app/vendors/hterm/hterm_all.js

// This file was generated by libdot/bin/concat.sh.
// It has been marked read-only for your safety.  Rather
// than edit it directly, please modify one of these source
// files...
//
// libdot/js/lib.js
// libdot/js/lib_colors.js
// libdot/js/lib_f.js
// libdot/js/lib_message_manager.js
// libdot/js/lib_preference_manager.js
// libdot/js/lib_resource.js
// libdot/js/lib_storage.js
// libdot/js/lib_storage_chrome.js
// libdot/js/lib_storage_local.js
// libdot/js/lib_storage_memory.js
// libdot/js/lib_test_manager.js
// libdot/js/lib_utf8.js
// libdot/js/lib_wc.js
// hterm/js/hterm.js
// hterm/js/hterm_frame.js
// hterm/js/hterm_keyboard.js
// hterm/js/hterm_keyboard_bindings.js
// hterm/js/hterm_keyboard_keymap.js
// hterm/js/hterm_keyboard_keypattern.js
// hterm/js/hterm_options.js
// hterm/js/hterm_parser.js
// hterm/js/hterm_parser_identifiers.js
// hterm/js/hterm_preference_manager.js
// hterm/js/hterm_pubsub.js
// hterm/js/hterm_screen.js
// hterm/js/hterm_scrollport.js
// hterm/js/hterm_terminal.js
// hterm/js/hterm_terminal_io.js
// hterm/js/hterm_text_attributes.js
// hterm/js/hterm_vt.js
// hterm/js/hterm_vt_character_map.js
//

// SOURCE FILE: libdot/js/lib.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

if (typeof lib != 'undefined')
  throw new Error('Global "lib" object already exists.');

var lib = {};

/**
 * Map of "dependency" to ["source", ...].
 *
 * Each dependency is a object name, like "lib.fs", "source" is the url that
 * depends on the object.
 */
lib.runtimeDependencies_ = {};

/**
 * List of functions that need to be invoked during library initialization.
 *
 * Each element in the initCallbacks_ array is itself a two-element array.
 * Element 0 is a short string describing the owner of the init routine, useful
 * for debugging.  Element 1 is the callback function.
 */
lib.initCallbacks_ = [];

/**
 * Records a runtime dependency.
 *
 * This can be useful when you want to express a run-time dependency at
 * compile time.  It is not intended to be a full-fledged library system or
 * dependency tracker.  It's just there to make it possible to debug the
 * deps without running all the code.
 *
 * Object names are specified as strings.  For example...
 *
 *     lib.rtdep('lib.colors', 'lib.PreferenceManager');
 *
 * Object names need not be rooted by 'lib'.  You may use this to declare a
 * dependency on any object.
 *
 * The client program may call lib.ensureRuntimeDependencies() at startup in
 * order to ensure that all runtime dependencies have been met.
 *
 * @param {string} var_args One or more objects specified as strings.
 */
lib.rtdep = function(var_args) {
  var source;

  try {
    throw new Error();
  } catch (ex) {
    var stackArray = ex.stack.split('\n');
    // In Safari, the resulting stackArray will only have 2 elements and the
    // individual strings are formatted differently.
    if (stackArray.length >= 3) {
      source = stackArray[2].replace(/^\s*at\s+/, '');
    } else {
      source = stackArray[1].replace(/^\s*global code@/, '');
    }
  }

  for (var i = 0; i < arguments.length; i++) {
    var path = arguments[i];
    if (path instanceof Array) {
      lib.rtdep.apply(lib, path);
    } else {
      var ary = this.runtimeDependencies_[path];
      if (!ary)
        ary = this.runtimeDependencies_[path] = [];
      ary.push(source);
    }
  }
};

/**
 * Ensures that all runtime dependencies are met, or an exception is thrown.
 *
 * Every unmet runtime dependency will be logged to the JS console.  If at
 * least one dependency is unmet this will raise an exception.
 */
lib.ensureRuntimeDependencies_ = function() {
  var passed = true;

  for (var path in lib.runtimeDependencies_) {
    var sourceList = lib.runtimeDependencies_[path];
    var names = path.split('.');

    // In a document context 'window' is the global object.  In a worker it's
    // called 'self'.
    var obj = (window || self);
    for (var i = 0; i < names.length; i++) {
      if (!(names[i] in obj)) {
        console.warn('Missing "' + path + '" is needed by', sourceList);
        passed = false;
        break;
      }

      obj = obj[names[i]];
    }
  }

  if (!passed)
    throw new Error('Failed runtime dependency check');
};

/**
 * Register an initialization function.
 *
 * The initialization functions are invoked in registration order when
 * lib.init() is invoked.  Each function will receive a single parameter, which
 * is a function to be invoked when it completes its part of the initialization.
 *
 * @param {string} name A short descriptive name of the init routine useful for
 *     debugging.
 * @param {function(function)} callback The initialization function to register.
 * @return {function} The callback parameter.
 */
lib.registerInit = function(name, callback) {
  lib.initCallbacks_.push([name, callback]);
  return callback;
};

/**
 * Initialize the library.
 *
 * This will ensure that all registered runtime dependencies are met, and
 * invoke any registered initialization functions.
 *
 * Initialization is asynchronous.  The library is not ready for use until
 * the onInit function is invoked.
 *
 * @param {function()} onInit The function to invoke when initialization is
 *     complete.
 * @param {function(*)} opt_logFunction An optional function to send
 *     initialization related log messages to.
 */
lib.init = function(onInit, opt_logFunction) {
  var ary = lib.initCallbacks_;

  var initNext = function() {
    if (ary.length) {
      var rec = ary.shift();
      if (opt_logFunction)
        opt_logFunction('init: ' + rec[0]);
      rec[1](lib.f.alarm(initNext));
    } else {
      onInit();
    }
  };

  if (typeof onInit != 'function')
    throw new Error('Missing or invalid argument: onInit');

  lib.ensureRuntimeDependencies_();

  setTimeout(initNext, 0);
};
// SOURCE FILE: libdot/js/lib_colors.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Namespace for color utilities.
 */
lib.colors = {};

/**
 * First, some canned regular expressions we're going to use in this file.
 *
 *
 *                              BRACE YOURSELF
 *
 *                                 ,~~~~.
 *                                 |>_< ~~
 *                                3`---'-/.
 *                                3:::::\v\
 *                               =o=:::::\,\
 *                                | :::::\,,\
 *
 *                        THE REGULAR EXPRESSIONS
 *                               ARE COMING.
 *
 * There's no way to break long RE literals in JavaScript.  Fix that why don't
 * you?  Oh, and also there's no way to write a string that doesn't interpret
 * escapes.
 *
 * Instead, we stoop to this .replace() trick.
 */
lib.colors.re_ = {
  // CSS hex color, #RGB.
  hex16: /#([a-f0-9])([a-f0-9])([a-f0-9])/i,

  // CSS hex color, #RRGGBB.
  hex24: /#([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/i,

  // CSS rgb color, rgb(rrr,ggg,bbb).
  rgb: new RegExp(
      ('^/s*rgb/s*/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,' +
       '/s*(/d{1,3})/s*/)/s*$'
       ).replace(/\//g, '\\'), 'i'),

  // CSS rgb color, rgb(rrr,ggg,bbb,aaa).
  rgba: new RegExp(
      ('^/s*rgba/s*' +
       '/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,/s*(/d{1,3})/s*' +
       '(?:,/s*(/d+(?:/./d+)?)/s*)/)/s*$'
       ).replace(/\//g, '\\'), 'i'),

  // Either RGB or RGBA.
  rgbx: new RegExp(
      ('^/s*rgba?/s*' +
       '/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,/s*(/d{1,3})/s*' +
       '(?:,/s*(/d+(?:/./d+)?)/s*)?/)/s*$'
       ).replace(/\//g, '\\'), 'i'),

  // An X11 "rgb:dddd/dddd/dddd" value.
  x11rgb: /^\s*rgb:([a-f0-9]{1,4})\/([a-f0-9]{1,4})\/([a-f0-9]{1,4})\s*$/i,

  // English color name.
  name: /[a-z][a-z0-9\s]+/,
};

/**
 * Convert a CSS rgb(ddd,ddd,ddd) color value into an X11 color value.
 *
 * Other CSS color values are ignored to ensure sanitary data handling.
 *
 * Each 'ddd' component is a one byte value specified in decimal.
 *
 * @param {string} value The CSS color value to convert.
 * @return {string} The X11 color value or null if the value could not be
 *     converted.
 */
lib.colors.rgbToX11 = function(value) {
  function scale(v) {
    v = (Math.min(v, 255) * 257).toString(16);
    return lib.f.zpad(v, 4);
  }

  var ary = value.match(lib.colors.re_.rgbx);
  if (!ary)
    return null;

  return 'rgb:' + scale(ary[1]) + '/' + scale(ary[2]) + '/' + scale(ary[3]);
};

/**
 * Convert a legacy X11 colover value into an CSS rgb(...) color value.
 *
 * They take the form:
 * 12 bit: #RGB          -> #R000G000B000
 * 24 bit: #RRGGBB       -> #RR00GG00BB00
 * 36 bit: #RRRGGGBBB    -> #RRR0GGG0BBB0
 * 48 bit: #RRRRGGGGBBBB
 * These are the most significant bits.
 *
 * Truncate values back down to 24 bit since that's all CSS supports.
 */
lib.colors.x11HexToCSS = function(v) {
  if (!v.startsWith('#'))
    return null;
  // Strip the leading # off.
  v = v.substr(1);

  // Reject unknown sizes.
  if ([3, 6, 9, 12].indexOf(v.length) == -1)
    return null;

  // Reject non-hex values.
  if (v.match(/[^a-f0-9]/i))
    return null;

  // Split the colors out.
  var size = v.length / 3;
  var r = v.substr(0, size);
  var g = v.substr(size, size);
  var b = v.substr(size + size, size);

  // Normalize to 16 bits.
  function norm16(v) {
    v = parseInt(v, 16);
    return size == 2 ? v :         // 16 bit
           size == 1 ? v << 4 :    // 8 bit
           v >> (4 * (size - 2));  // 24 or 32 bit
  }
  return lib.colors.arrayToRGBA([r, g, b].map(norm16));
};

/**
 * Convert an X11 color value into an CSS rgb(...) color value.
 *
 * The X11 value may be an X11 color name, or an RGB value of the form
 * rgb:hhhh/hhhh/hhhh.  If a component value is less than 4 digits it is
 * padded out to 4, then scaled down to fit in a single byte.
 *
 * @param {string} value The X11 color value to convert.
 * @return {string} The CSS color value or null if the value could not be
 *     converted.
 */
lib.colors.x11ToCSS = function(v) {
  function scale(v) {
    // Pad out values with less than four digits.  This padding (probably)
    // matches xterm.  It's difficult to say for sure since xterm seems to
    // arrive at a padded value and then perform some combination of
    // gamma correction, color space transformation, and quantization.

    if (v.length == 1) {
      // Single digits pad out to four by repeating the character.  "f" becomes
      // "ffff".  Scaling down a hex value of this pattern by 257 is the same
      // as cutting off one byte.  We skip the middle step and just double
      // the character.
      return parseInt(v + v, 16);
    }

    if (v.length == 2) {
      // Similar deal here.  X11 pads two digit values by repeating the
      // byte (or scale up by 257).  Since we're going to scale it back
      // down anyway, we can just return the original value.
      return parseInt(v, 16);
    }

    if (v.length == 3) {
      // Three digit values seem to be padded by repeating the final digit.
      // e.g. 10f becomes 10ff.
      v = v + v.substr(2);
    }

    // Scale down the 2 byte value.
    return Math.round(parseInt(v, 16) / 257);
  }

  var ary = v.match(lib.colors.re_.x11rgb);
  if (!ary) {
    // Handle the legacy format.
    if (v.startsWith('#'))
      return lib.colors.x11HexToCSS(v);
    else
      return lib.colors.nameToRGB(v);
  }

  ary.splice(0, 1);
  return lib.colors.arrayToRGBA(ary.map(scale));
};

/**
 * Converts one or more CSS '#RRGGBB' color values into their rgb(...)
 * form.
 *
 * Arrays are converted in place. If a value cannot be converted, it is
 * replaced with null.
 *
 * @param {string|Array.<string>} A single RGB value or array of RGB values to
 *     convert.
 * @return {string|Array.<string>} The converted value or values.
 */
lib.colors.hexToRGB = function(arg) {
  var hex16 = lib.colors.re_.hex16;
  var hex24 = lib.colors.re_.hex24;

  function convert(hex) {
    if (hex.length == 4) {
      hex = hex.replace(hex16, function(h, r, g, b) {
        return "#" + r + r + g + g + b + b;
      });
    }
    var ary = hex.match(hex24);
    if (!ary)
      return null;

    return 'rgb(' + parseInt(ary[1], 16) + ', ' +
        parseInt(ary[2], 16) + ', ' +
        parseInt(ary[3], 16) + ')';
  }

  if (arg instanceof Array) {
    for (var i = 0; i < arg.length; i++) {
      arg[i] = convert(arg[i]);
    }
  } else {
    arg = convert(arg);
  }

  return arg;
};

/**
 * Converts one or more CSS rgb(...) forms into their '#RRGGBB' color values.
 *
 * If given an rgba(...) form, the alpha field is thrown away.
 *
 * Arrays are converted in place. If a value cannot be converted, it is
 * replaced with null.
 *
 * @param {string|Array.<string>} A single rgb(...) value or array of rgb(...)
 *     values to convert.
 * @return {string|Array.<string>} The converted value or values.
 */
lib.colors.rgbToHex = function(arg) {
  function convert(rgb) {
    var ary = lib.colors.crackRGB(rgb);
    if (!ary)
      return null;
    return '#' + lib.f.zpad(((parseInt(ary[0]) << 16) |
                             (parseInt(ary[1]) <<  8) |
                             (parseInt(ary[2]) <<  0)).toString(16), 6);
  }

  if (arg instanceof Array) {
    for (var i = 0; i < arg.length; i++) {
      arg[i] = convert(arg[i]);
    }
  } else {
    arg = convert(arg);
  }

  return arg;
};

/**
 * Take any valid css color definition and turn it into an rgb or rgba value.
 *
 * Returns null if the value could not be normalized.
 */
lib.colors.normalizeCSS = function(def) {
  if (def.substr(0, 1) == '#')
    return lib.colors.hexToRGB(def);

  if (lib.colors.re_.rgbx.test(def))
    return def;

  return lib.colors.nameToRGB(def);
};

/**
 * Convert a 3 or 4 element array into an rgba(...) string.
 */
lib.colors.arrayToRGBA = function(ary) {
  var alpha = (ary.length > 3) ? ary[3] : 1;
  return 'rgba(' + ary[0] + ', ' + ary[1] + ', ' + ary[2] + ', ' + alpha + ')';
};

/**
 * Overwrite the alpha channel of an rgb/rgba color.
 */
lib.colors.setAlpha = function(rgb, alpha) {
  var ary = lib.colors.crackRGB(rgb);
  ary[3] = alpha;
  return lib.colors.arrayToRGBA(ary);
};

/**
 * Mix a percentage of a tint color into a base color.
 */
lib.colors.mix = function(base, tint, percent) {
  var ary1 = lib.colors.crackRGB(base);
  var ary2 = lib.colors.crackRGB(tint);

  for (var i = 0; i < 4; ++i) {
    var diff = ary2[i] - ary1[i];
    ary1[i] = Math.round(parseInt(ary1[i]) + diff * percent);
  }

  return lib.colors.arrayToRGBA(ary1);
};

/**
 * Split an rgb/rgba color into an array of its components.
 *
 * On success, a 4 element array will be returned.  For rgb values, the alpha
 * will be set to 1.
 */
lib.colors.crackRGB = function(color) {
  if (color.substr(0, 4) == 'rgba') {
    var ary = color.match(lib.colors.re_.rgba);
    if (ary) {
      ary.shift();
      return ary;
    }
  } else {
    var ary = color.match(lib.colors.re_.rgb);
    if (ary) {
      ary.shift();
      ary.push(1);
      return ary;
    }
  }

  console.error('Couldn\'t crack: ' + color);
  return null;
};

/**
 * Convert an X11 color name into a CSS rgb(...) value.
 *
 * Names are stripped of spaces and converted to lowercase.  If the name is
 * unknown, null is returned.
 *
 * This list of color name to RGB mapping is derived from the stock X11
 * rgb.txt file.
 *
 * @param {string} name The color name to convert.
 * @return {string} The corresponding CSS rgb(...) value.
 */
lib.colors.nameToRGB = function(name) {
  if (name in lib.colors.colorNames)
    return lib.colors.colorNames[name];

  name = name.toLowerCase();
  if (name in lib.colors.colorNames)
    return lib.colors.colorNames[name];

  name = name.replace(/\s+/g, '');
  if (name in lib.colors.colorNames)
    return lib.colors.colorNames[name];

  return null;
};

/**
 * The stock color palette.
 */
lib.colors.stockColorPalette = lib.colors.hexToRGB
  ([// The "ANSI 16"...
    '#000000', '#CC0000', '#4E9A06', '#C4A000',
    '#3465A4', '#75507B', '#06989A', '#D3D7CF',
    '#555753', '#EF2929', '#00BA13', '#FCE94F',
    '#729FCF', '#F200CB', '#00B5BD', '#EEEEEC',

    // The 6x6 color cubes...
    '#000000', '#00005F', '#000087', '#0000AF', '#0000D7', '#0000FF',
    '#005F00', '#005F5F', '#005F87', '#005FAF', '#005FD7', '#005FFF',
    '#008700', '#00875F', '#008787', '#0087AF', '#0087D7', '#0087FF',
    '#00AF00', '#00AF5F', '#00AF87', '#00AFAF', '#00AFD7', '#00AFFF',
    '#00D700', '#00D75F', '#00D787', '#00D7AF', '#00D7D7', '#00D7FF',
    '#00FF00', '#00FF5F', '#00FF87', '#00FFAF', '#00FFD7', '#00FFFF',

    '#5F0000', '#5F005F', '#5F0087', '#5F00AF', '#5F00D7', '#5F00FF',
    '#5F5F00', '#5F5F5F', '#5F5F87', '#5F5FAF', '#5F5FD7', '#5F5FFF',
    '#5F8700', '#5F875F', '#5F8787', '#5F87AF', '#5F87D7', '#5F87FF',
    '#5FAF00', '#5FAF5F', '#5FAF87', '#5FAFAF', '#5FAFD7', '#5FAFFF',
    '#5FD700', '#5FD75F', '#5FD787', '#5FD7AF', '#5FD7D7', '#5FD7FF',
    '#5FFF00', '#5FFF5F', '#5FFF87', '#5FFFAF', '#5FFFD7', '#5FFFFF',

    '#870000', '#87005F', '#870087', '#8700AF', '#8700D7', '#8700FF',
    '#875F00', '#875F5F', '#875F87', '#875FAF', '#875FD7', '#875FFF',
    '#878700', '#87875F', '#878787', '#8787AF', '#8787D7', '#8787FF',
    '#87AF00', '#87AF5F', '#87AF87', '#87AFAF', '#87AFD7', '#87AFFF',
    '#87D700', '#87D75F', '#87D787', '#87D7AF', '#87D7D7', '#87D7FF',
    '#87FF00', '#87FF5F', '#87FF87', '#87FFAF', '#87FFD7', '#87FFFF',

    '#AF0000', '#AF005F', '#AF0087', '#AF00AF', '#AF00D7', '#AF00FF',
    '#AF5F00', '#AF5F5F', '#AF5F87', '#AF5FAF', '#AF5FD7', '#AF5FFF',
    '#AF8700', '#AF875F', '#AF8787', '#AF87AF', '#AF87D7', '#AF87FF',
    '#AFAF00', '#AFAF5F', '#AFAF87', '#AFAFAF', '#AFAFD7', '#AFAFFF',
    '#AFD700', '#AFD75F', '#AFD787', '#AFD7AF', '#AFD7D7', '#AFD7FF',
    '#AFFF00', '#AFFF5F', '#AFFF87', '#AFFFAF', '#AFFFD7', '#AFFFFF',

    '#D70000', '#D7005F', '#D70087', '#D700AF', '#D700D7', '#D700FF',
    '#D75F00', '#D75F5F', '#D75F87', '#D75FAF', '#D75FD7', '#D75FFF',
    '#D78700', '#D7875F', '#D78787', '#D787AF', '#D787D7', '#D787FF',
    '#D7AF00', '#D7AF5F', '#D7AF87', '#D7AFAF', '#D7AFD7', '#D7AFFF',
    '#D7D700', '#D7D75F', '#D7D787', '#D7D7AF', '#D7D7D7', '#D7D7FF',
    '#D7FF00', '#D7FF5F', '#D7FF87', '#D7FFAF', '#D7FFD7', '#D7FFFF',

    '#FF0000', '#FF005F', '#FF0087', '#FF00AF', '#FF00D7', '#FF00FF',
    '#FF5F00', '#FF5F5F', '#FF5F87', '#FF5FAF', '#FF5FD7', '#FF5FFF',
    '#FF8700', '#FF875F', '#FF8787', '#FF87AF', '#FF87D7', '#FF87FF',
    '#FFAF00', '#FFAF5F', '#FFAF87', '#FFAFAF', '#FFAFD7', '#FFAFFF',
    '#FFD700', '#FFD75F', '#FFD787', '#FFD7AF', '#FFD7D7', '#FFD7FF',
    '#FFFF00', '#FFFF5F', '#FFFF87', '#FFFFAF', '#FFFFD7', '#FFFFFF',

    // The greyscale ramp...
    '#080808', '#121212', '#1C1C1C', '#262626', '#303030', '#3A3A3A',
    '#444444', '#4E4E4E', '#585858', '#626262', '#6C6C6C', '#767676',
    '#808080', '#8A8A8A', '#949494', '#9E9E9E', '#A8A8A8', '#B2B2B2',
    '#BCBCBC', '#C6C6C6', '#D0D0D0', '#DADADA', '#E4E4E4', '#EEEEEE'
   ]);

/**
 * The current color palette, possibly with user changes.
 */
lib.colors.colorPalette = lib.colors.stockColorPalette;

/**
 * Named colors according to the stock X11 rgb.txt file.
 */
lib.colors.colorNames = {
  "aliceblue": "rgb(240, 248, 255)",
  "antiquewhite": "rgb(250, 235, 215)",
  "antiquewhite1": "rgb(255, 239, 219)",
  "antiquewhite2": "rgb(238, 223, 204)",
  "antiquewhite3": "rgb(205, 192, 176)",
  "antiquewhite4": "rgb(139, 131, 120)",
  "aquamarine": "rgb(127, 255, 212)",
  "aquamarine1": "rgb(127, 255, 212)",
  "aquamarine2": "rgb(118, 238, 198)",
  "aquamarine3": "rgb(102, 205, 170)",
  "aquamarine4": "rgb(69, 139, 116)",
  "azure": "rgb(240, 255, 255)",
  "azure1": "rgb(240, 255, 255)",
  "azure2": "rgb(224, 238, 238)",
  "azure3": "rgb(193, 205, 205)",
  "azure4": "rgb(131, 139, 139)",
  "beige": "rgb(245, 245, 220)",
  "bisque": "rgb(255, 228, 196)",
  "bisque1": "rgb(255, 228, 196)",
  "bisque2": "rgb(238, 213, 183)",
  "bisque3": "rgb(205, 183, 158)",
  "bisque4": "rgb(139, 125, 107)",
  "black": "rgb(0, 0, 0)",
  "blanchedalmond": "rgb(255, 235, 205)",
  "blue": "rgb(0, 0, 255)",
  "blue1": "rgb(0, 0, 255)",
  "blue2": "rgb(0, 0, 238)",
  "blue3": "rgb(0, 0, 205)",
  "blue4": "rgb(0, 0, 139)",
  "blueviolet": "rgb(138, 43, 226)",
  "brown": "rgb(165, 42, 42)",
  "brown1": "rgb(255, 64, 64)",
  "brown2": "rgb(238, 59, 59)",
  "brown3": "rgb(205, 51, 51)",
  "brown4": "rgb(139, 35, 35)",
  "burlywood": "rgb(222, 184, 135)",
  "burlywood1": "rgb(255, 211, 155)",
  "burlywood2": "rgb(238, 197, 145)",
  "burlywood3": "rgb(205, 170, 125)",
  "burlywood4": "rgb(139, 115, 85)",
  "cadetblue": "rgb(95, 158, 160)",
  "cadetblue1": "rgb(152, 245, 255)",
  "cadetblue2": "rgb(142, 229, 238)",
  "cadetblue3": "rgb(122, 197, 205)",
  "cadetblue4": "rgb(83, 134, 139)",
  "chartreuse": "rgb(127, 255, 0)",
  "chartreuse1": "rgb(127, 255, 0)",
  "chartreuse2": "rgb(118, 238, 0)",
  "chartreuse3": "rgb(102, 205, 0)",
  "chartreuse4": "rgb(69, 139, 0)",
  "chocolate": "rgb(210, 105, 30)",
  "chocolate1": "rgb(255, 127, 36)",
  "chocolate2": "rgb(238, 118, 33)",
  "chocolate3": "rgb(205, 102, 29)",
  "chocolate4": "rgb(139, 69, 19)",
  "coral": "rgb(255, 127, 80)",
  "coral1": "rgb(255, 114, 86)",
  "coral2": "rgb(238, 106, 80)",
  "coral3": "rgb(205, 91, 69)",
  "coral4": "rgb(139, 62, 47)",
  "cornflowerblue": "rgb(100, 149, 237)",
  "cornsilk": "rgb(255, 248, 220)",
  "cornsilk1": "rgb(255, 248, 220)",
  "cornsilk2": "rgb(238, 232, 205)",
  "cornsilk3": "rgb(205, 200, 177)",
  "cornsilk4": "rgb(139, 136, 120)",
  "cyan": "rgb(0, 255, 255)",
  "cyan1": "rgb(0, 255, 255)",
  "cyan2": "rgb(0, 238, 238)",
  "cyan3": "rgb(0, 205, 205)",
  "cyan4": "rgb(0, 139, 139)",
  "darkblue": "rgb(0, 0, 139)",
  "darkcyan": "rgb(0, 139, 139)",
  "darkgoldenrod": "rgb(184, 134, 11)",
  "darkgoldenrod1": "rgb(255, 185, 15)",
  "darkgoldenrod2": "rgb(238, 173, 14)",
  "darkgoldenrod3": "rgb(205, 149, 12)",
  "darkgoldenrod4": "rgb(139, 101, 8)",
  "darkgray": "rgb(169, 169, 169)",
  "darkgreen": "rgb(0, 100, 0)",
  "darkgrey": "rgb(169, 169, 169)",
  "darkkhaki": "rgb(189, 183, 107)",
  "darkmagenta": "rgb(139, 0, 139)",
  "darkolivegreen": "rgb(85, 107, 47)",
  "darkolivegreen1": "rgb(202, 255, 112)",
  "darkolivegreen2": "rgb(188, 238, 104)",
  "darkolivegreen3": "rgb(162, 205, 90)",
  "darkolivegreen4": "rgb(110, 139, 61)",
  "darkorange": "rgb(255, 140, 0)",
  "darkorange1": "rgb(255, 127, 0)",
  "darkorange2": "rgb(238, 118, 0)",
  "darkorange3": "rgb(205, 102, 0)",
  "darkorange4": "rgb(139, 69, 0)",
  "darkorchid": "rgb(153, 50, 204)",
  "darkorchid1": "rgb(191, 62, 255)",
  "darkorchid2": "rgb(178, 58, 238)",
  "darkorchid3": "rgb(154, 50, 205)",
  "darkorchid4": "rgb(104, 34, 139)",
  "darkred": "rgb(139, 0, 0)",
  "darksalmon": "rgb(233, 150, 122)",
  "darkseagreen": "rgb(143, 188, 143)",
  "darkseagreen1": "rgb(193, 255, 193)",
  "darkseagreen2": "rgb(180, 238, 180)",
  "darkseagreen3": "rgb(155, 205, 155)",
  "darkseagreen4": "rgb(105, 139, 105)",
  "darkslateblue": "rgb(72, 61, 139)",
  "darkslategray": "rgb(47, 79, 79)",
  "darkslategray1": "rgb(151, 255, 255)",
  "darkslategray2": "rgb(141, 238, 238)",
  "darkslategray3": "rgb(121, 205, 205)",
  "darkslategray4": "rgb(82, 139, 139)",
  "darkslategrey": "rgb(47, 79, 79)",
  "darkturquoise": "rgb(0, 206, 209)",
  "darkviolet": "rgb(148, 0, 211)",
  "debianred": "rgb(215, 7, 81)",
  "deeppink": "rgb(255, 20, 147)",
  "deeppink1": "rgb(255, 20, 147)",
  "deeppink2": "rgb(238, 18, 137)",
  "deeppink3": "rgb(205, 16, 118)",
  "deeppink4": "rgb(139, 10, 80)",
  "deepskyblue": "rgb(0, 191, 255)",
  "deepskyblue1": "rgb(0, 191, 255)",
  "deepskyblue2": "rgb(0, 178, 238)",
  "deepskyblue3": "rgb(0, 154, 205)",
  "deepskyblue4": "rgb(0, 104, 139)",
  "dimgray": "rgb(105, 105, 105)",
  "dimgrey": "rgb(105, 105, 105)",
  "dodgerblue": "rgb(30, 144, 255)",
  "dodgerblue1": "rgb(30, 144, 255)",
  "dodgerblue2": "rgb(28, 134, 238)",
  "dodgerblue3": "rgb(24, 116, 205)",
  "dodgerblue4": "rgb(16, 78, 139)",
  "firebrick": "rgb(178, 34, 34)",
  "firebrick1": "rgb(255, 48, 48)",
  "firebrick2": "rgb(238, 44, 44)",
  "firebrick3": "rgb(205, 38, 38)",
  "firebrick4": "rgb(139, 26, 26)",
  "floralwhite": "rgb(255, 250, 240)",
  "forestgreen": "rgb(34, 139, 34)",
  "gainsboro": "rgb(220, 220, 220)",
  "ghostwhite": "rgb(248, 248, 255)",
  "gold": "rgb(255, 215, 0)",
  "gold1": "rgb(255, 215, 0)",
  "gold2": "rgb(238, 201, 0)",
  "gold3": "rgb(205, 173, 0)",
  "gold4": "rgb(139, 117, 0)",
  "goldenrod": "rgb(218, 165, 32)",
  "goldenrod1": "rgb(255, 193, 37)",
  "goldenrod2": "rgb(238, 180, 34)",
  "goldenrod3": "rgb(205, 155, 29)",
  "goldenrod4": "rgb(139, 105, 20)",
  "gray": "rgb(190, 190, 190)",
  "gray0": "rgb(0, 0, 0)",
  "gray1": "rgb(3, 3, 3)",
  "gray10": "rgb(26, 26, 26)",
  "gray100": "rgb(255, 255, 255)",
  "gray11": "rgb(28, 28, 28)",
  "gray12": "rgb(31, 31, 31)",
  "gray13": "rgb(33, 33, 33)",
  "gray14": "rgb(36, 36, 36)",
  "gray15": "rgb(38, 38, 38)",
  "gray16": "rgb(41, 41, 41)",
  "gray17": "rgb(43, 43, 43)",
  "gray18": "rgb(46, 46, 46)",
  "gray19": "rgb(48, 48, 48)",
  "gray2": "rgb(5, 5, 5)",
  "gray20": "rgb(51, 51, 51)",
  "gray21": "rgb(54, 54, 54)",
  "gray22": "rgb(56, 56, 56)",
  "gray23": "rgb(59, 59, 59)",
  "gray24": "rgb(61, 61, 61)",
  "gray25": "rgb(64, 64, 64)",
  "gray26": "rgb(66, 66, 66)",
  "gray27": "rgb(69, 69, 69)",
  "gray28": "rgb(71, 71, 71)",
  "gray29": "rgb(74, 74, 74)",
  "gray3": "rgb(8, 8, 8)",
  "gray30": "rgb(77, 77, 77)",
  "gray31": "rgb(79, 79, 79)",
  "gray32": "rgb(82, 82, 82)",
  "gray33": "rgb(84, 84, 84)",
  "gray34": "rgb(87, 87, 87)",
  "gray35": "rgb(89, 89, 89)",
  "gray36": "rgb(92, 92, 92)",
  "gray37": "rgb(94, 94, 94)",
  "gray38": "rgb(97, 97, 97)",
  "gray39": "rgb(99, 99, 99)",
  "gray4": "rgb(10, 10, 10)",
  "gray40": "rgb(102, 102, 102)",
  "gray41": "rgb(105, 105, 105)",
  "gray42": "rgb(107, 107, 107)",
  "gray43": "rgb(110, 110, 110)",
  "gray44": "rgb(112, 112, 112)",
  "gray45": "rgb(115, 115, 115)",
  "gray46": "rgb(117, 117, 117)",
  "gray47": "rgb(120, 120, 120)",
  "gray48": "rgb(122, 122, 122)",
  "gray49": "rgb(125, 125, 125)",
  "gray5": "rgb(13, 13, 13)",
  "gray50": "rgb(127, 127, 127)",
  "gray51": "rgb(130, 130, 130)",
  "gray52": "rgb(133, 133, 133)",
  "gray53": "rgb(135, 135, 135)",
  "gray54": "rgb(138, 138, 138)",
  "gray55": "rgb(140, 140, 140)",
  "gray56": "rgb(143, 143, 143)",
  "gray57": "rgb(145, 145, 145)",
  "gray58": "rgb(148, 148, 148)",
  "gray59": "rgb(150, 150, 150)",
  "gray6": "rgb(15, 15, 15)",
  "gray60": "rgb(153, 153, 153)",
  "gray61": "rgb(156, 156, 156)",
  "gray62": "rgb(158, 158, 158)",
  "gray63": "rgb(161, 161, 161)",
  "gray64": "rgb(163, 163, 163)",
  "gray65": "rgb(166, 166, 166)",
  "gray66": "rgb(168, 168, 168)",
  "gray67": "rgb(171, 171, 171)",
  "gray68": "rgb(173, 173, 173)",
  "gray69": "rgb(176, 176, 176)",
  "gray7": "rgb(18, 18, 18)",
  "gray70": "rgb(179, 179, 179)",
  "gray71": "rgb(181, 181, 181)",
  "gray72": "rgb(184, 184, 184)",
  "gray73": "rgb(186, 186, 186)",
  "gray74": "rgb(189, 189, 189)",
  "gray75": "rgb(191, 191, 191)",
  "gray76": "rgb(194, 194, 194)",
  "gray77": "rgb(196, 196, 196)",
  "gray78": "rgb(199, 199, 199)",
  "gray79": "rgb(201, 201, 201)",
  "gray8": "rgb(20, 20, 20)",
  "gray80": "rgb(204, 204, 204)",
  "gray81": "rgb(207, 207, 207)",
  "gray82": "rgb(209, 209, 209)",
  "gray83": "rgb(212, 212, 212)",
  "gray84": "rgb(214, 214, 214)",
  "gray85": "rgb(217, 217, 217)",
  "gray86": "rgb(219, 219, 219)",
  "gray87": "rgb(222, 222, 222)",
  "gray88": "rgb(224, 224, 224)",
  "gray89": "rgb(227, 227, 227)",
  "gray9": "rgb(23, 23, 23)",
  "gray90": "rgb(229, 229, 229)",
  "gray91": "rgb(232, 232, 232)",
  "gray92": "rgb(235, 235, 235)",
  "gray93": "rgb(237, 237, 237)",
  "gray94": "rgb(240, 240, 240)",
  "gray95": "rgb(242, 242, 242)",
  "gray96": "rgb(245, 245, 245)",
  "gray97": "rgb(247, 247, 247)",
  "gray98": "rgb(250, 250, 250)",
  "gray99": "rgb(252, 252, 252)",
  "green": "rgb(0, 255, 0)",
  "green1": "rgb(0, 255, 0)",
  "green2": "rgb(0, 238, 0)",
  "green3": "rgb(0, 205, 0)",
  "green4": "rgb(0, 139, 0)",
  "greenyellow": "rgb(173, 255, 47)",
  "grey": "rgb(190, 190, 190)",
  "grey0": "rgb(0, 0, 0)",
  "grey1": "rgb(3, 3, 3)",
  "grey10": "rgb(26, 26, 26)",
  "grey100": "rgb(255, 255, 255)",
  "grey11": "rgb(28, 28, 28)",
  "grey12": "rgb(31, 31, 31)",
  "grey13": "rgb(33, 33, 33)",
  "grey14": "rgb(36, 36, 36)",
  "grey15": "rgb(38, 38, 38)",
  "grey16": "rgb(41, 41, 41)",
  "grey17": "rgb(43, 43, 43)",
  "grey18": "rgb(46, 46, 46)",
  "grey19": "rgb(48, 48, 48)",
  "grey2": "rgb(5, 5, 5)",
  "grey20": "rgb(51, 51, 51)",
  "grey21": "rgb(54, 54, 54)",
  "grey22": "rgb(56, 56, 56)",
  "grey23": "rgb(59, 59, 59)",
  "grey24": "rgb(61, 61, 61)",
  "grey25": "rgb(64, 64, 64)",
  "grey26": "rgb(66, 66, 66)",
  "grey27": "rgb(69, 69, 69)",
  "grey28": "rgb(71, 71, 71)",
  "grey29": "rgb(74, 74, 74)",
  "grey3": "rgb(8, 8, 8)",
  "grey30": "rgb(77, 77, 77)",
  "grey31": "rgb(79, 79, 79)",
  "grey32": "rgb(82, 82, 82)",
  "grey33": "rgb(84, 84, 84)",
  "grey34": "rgb(87, 87, 87)",
  "grey35": "rgb(89, 89, 89)",
  "grey36": "rgb(92, 92, 92)",
  "grey37": "rgb(94, 94, 94)",
  "grey38": "rgb(97, 97, 97)",
  "grey39": "rgb(99, 99, 99)",
  "grey4": "rgb(10, 10, 10)",
  "grey40": "rgb(102, 102, 102)",
  "grey41": "rgb(105, 105, 105)",
  "grey42": "rgb(107, 107, 107)",
  "grey43": "rgb(110, 110, 110)",
  "grey44": "rgb(112, 112, 112)",
  "grey45": "rgb(115, 115, 115)",
  "grey46": "rgb(117, 117, 117)",
  "grey47": "rgb(120, 120, 120)",
  "grey48": "rgb(122, 122, 122)",
  "grey49": "rgb(125, 125, 125)",
  "grey5": "rgb(13, 13, 13)",
  "grey50": "rgb(127, 127, 127)",
  "grey51": "rgb(130, 130, 130)",
  "grey52": "rgb(133, 133, 133)",
  "grey53": "rgb(135, 135, 135)",
  "grey54": "rgb(138, 138, 138)",
  "grey55": "rgb(140, 140, 140)",
  "grey56": "rgb(143, 143, 143)",
  "grey57": "rgb(145, 145, 145)",
  "grey58": "rgb(148, 148, 148)",
  "grey59": "rgb(150, 150, 150)",
  "grey6": "rgb(15, 15, 15)",
  "grey60": "rgb(153, 153, 153)",
  "grey61": "rgb(156, 156, 156)",
  "grey62": "rgb(158, 158, 158)",
  "grey63": "rgb(161, 161, 161)",
  "grey64": "rgb(163, 163, 163)",
  "grey65": "rgb(166, 166, 166)",
  "grey66": "rgb(168, 168, 168)",
  "grey67": "rgb(171, 171, 171)",
  "grey68": "rgb(173, 173, 173)",
  "grey69": "rgb(176, 176, 176)",
  "grey7": "rgb(18, 18, 18)",
  "grey70": "rgb(179, 179, 179)",
  "grey71": "rgb(181, 181, 181)",
  "grey72": "rgb(184, 184, 184)",
  "grey73": "rgb(186, 186, 186)",
  "grey74": "rgb(189, 189, 189)",
  "grey75": "rgb(191, 191, 191)",
  "grey76": "rgb(194, 194, 194)",
  "grey77": "rgb(196, 196, 196)",
  "grey78": "rgb(199, 199, 199)",
  "grey79": "rgb(201, 201, 201)",
  "grey8": "rgb(20, 20, 20)",
  "grey80": "rgb(204, 204, 204)",
  "grey81": "rgb(207, 207, 207)",
  "grey82": "rgb(209, 209, 209)",
  "grey83": "rgb(212, 212, 212)",
  "grey84": "rgb(214, 214, 214)",
  "grey85": "rgb(217, 217, 217)",
  "grey86": "rgb(219, 219, 219)",
  "grey87": "rgb(222, 222, 222)",
  "grey88": "rgb(224, 224, 224)",
  "grey89": "rgb(227, 227, 227)",
  "grey9": "rgb(23, 23, 23)",
  "grey90": "rgb(229, 229, 229)",
  "grey91": "rgb(232, 232, 232)",
  "grey92": "rgb(235, 235, 235)",
  "grey93": "rgb(237, 237, 237)",
  "grey94": "rgb(240, 240, 240)",
  "grey95": "rgb(242, 242, 242)",
  "grey96": "rgb(245, 245, 245)",
  "grey97": "rgb(247, 247, 247)",
  "grey98": "rgb(250, 250, 250)",
  "grey99": "rgb(252, 252, 252)",
  "honeydew": "rgb(240, 255, 240)",
  "honeydew1": "rgb(240, 255, 240)",
  "honeydew2": "rgb(224, 238, 224)",
  "honeydew3": "rgb(193, 205, 193)",
  "honeydew4": "rgb(131, 139, 131)",
  "hotpink": "rgb(255, 105, 180)",
  "hotpink1": "rgb(255, 110, 180)",
  "hotpink2": "rgb(238, 106, 167)",
  "hotpink3": "rgb(205, 96, 144)",
  "hotpink4": "rgb(139, 58, 98)",
  "indianred": "rgb(205, 92, 92)",
  "indianred1": "rgb(255, 106, 106)",
  "indianred2": "rgb(238, 99, 99)",
  "indianred3": "rgb(205, 85, 85)",
  "indianred4": "rgb(139, 58, 58)",
  "ivory": "rgb(255, 255, 240)",
  "ivory1": "rgb(255, 255, 240)",
  "ivory2": "rgb(238, 238, 224)",
  "ivory3": "rgb(205, 205, 193)",
  "ivory4": "rgb(139, 139, 131)",
  "khaki": "rgb(240, 230, 140)",
  "khaki1": "rgb(255, 246, 143)",
  "khaki2": "rgb(238, 230, 133)",
  "khaki3": "rgb(205, 198, 115)",
  "khaki4": "rgb(139, 134, 78)",
  "lavender": "rgb(230, 230, 250)",
  "lavenderblush": "rgb(255, 240, 245)",
  "lavenderblush1": "rgb(255, 240, 245)",
  "lavenderblush2": "rgb(238, 224, 229)",
  "lavenderblush3": "rgb(205, 193, 197)",
  "lavenderblush4": "rgb(139, 131, 134)",
  "lawngreen": "rgb(124, 252, 0)",
  "lemonchiffon": "rgb(255, 250, 205)",
  "lemonchiffon1": "rgb(255, 250, 205)",
  "lemonchiffon2": "rgb(238, 233, 191)",
  "lemonchiffon3": "rgb(205, 201, 165)",
  "lemonchiffon4": "rgb(139, 137, 112)",
  "lightblue": "rgb(173, 216, 230)",
  "lightblue1": "rgb(191, 239, 255)",
  "lightblue2": "rgb(178, 223, 238)",
  "lightblue3": "rgb(154, 192, 205)",
  "lightblue4": "rgb(104, 131, 139)",
  "lightcoral": "rgb(240, 128, 128)",
  "lightcyan": "rgb(224, 255, 255)",
  "lightcyan1": "rgb(224, 255, 255)",
  "lightcyan2": "rgb(209, 238, 238)",
  "lightcyan3": "rgb(180, 205, 205)",
  "lightcyan4": "rgb(122, 139, 139)",
  "lightgoldenrod": "rgb(238, 221, 130)",
  "lightgoldenrod1": "rgb(255, 236, 139)",
  "lightgoldenrod2": "rgb(238, 220, 130)",
  "lightgoldenrod3": "rgb(205, 190, 112)",
  "lightgoldenrod4": "rgb(139, 129, 76)",
  "lightgoldenrodyellow": "rgb(250, 250, 210)",
  "lightgray": "rgb(211, 211, 211)",
  "lightgreen": "rgb(144, 238, 144)",
  "lightgrey": "rgb(211, 211, 211)",
  "lightpink": "rgb(255, 182, 193)",
  "lightpink1": "rgb(255, 174, 185)",
  "lightpink2": "rgb(238, 162, 173)",
  "lightpink3": "rgb(205, 140, 149)",
  "lightpink4": "rgb(139, 95, 101)",
  "lightsalmon": "rgb(255, 160, 122)",
  "lightsalmon1": "rgb(255, 160, 122)",
  "lightsalmon2": "rgb(238, 149, 114)",
  "lightsalmon3": "rgb(205, 129, 98)",
  "lightsalmon4": "rgb(139, 87, 66)",
  "lightseagreen": "rgb(32, 178, 170)",
  "lightskyblue": "rgb(135, 206, 250)",
  "lightskyblue1": "rgb(176, 226, 255)",
  "lightskyblue2": "rgb(164, 211, 238)",
  "lightskyblue3": "rgb(141, 182, 205)",
  "lightskyblue4": "rgb(96, 123, 139)",
  "lightslateblue": "rgb(132, 112, 255)",
  "lightslategray": "rgb(119, 136, 153)",
  "lightslategrey": "rgb(119, 136, 153)",
  "lightsteelblue": "rgb(176, 196, 222)",
  "lightsteelblue1": "rgb(202, 225, 255)",
  "lightsteelblue2": "rgb(188, 210, 238)",
  "lightsteelblue3": "rgb(162, 181, 205)",
  "lightsteelblue4": "rgb(110, 123, 139)",
  "lightyellow": "rgb(255, 255, 224)",
  "lightyellow1": "rgb(255, 255, 224)",
  "lightyellow2": "rgb(238, 238, 209)",
  "lightyellow3": "rgb(205, 205, 180)",
  "lightyellow4": "rgb(139, 139, 122)",
  "limegreen": "rgb(50, 205, 50)",
  "linen": "rgb(250, 240, 230)",
  "magenta": "rgb(255, 0, 255)",
  "magenta1": "rgb(255, 0, 255)",
  "magenta2": "rgb(238, 0, 238)",
  "magenta3": "rgb(205, 0, 205)",
  "magenta4": "rgb(139, 0, 139)",
  "maroon": "rgb(176, 48, 96)",
  "maroon1": "rgb(255, 52, 179)",
  "maroon2": "rgb(238, 48, 167)",
  "maroon3": "rgb(205, 41, 144)",
  "maroon4": "rgb(139, 28, 98)",
  "mediumaquamarine": "rgb(102, 205, 170)",
  "mediumblue": "rgb(0, 0, 205)",
  "mediumorchid": "rgb(186, 85, 211)",
  "mediumorchid1": "rgb(224, 102, 255)",
  "mediumorchid2": "rgb(209, 95, 238)",
  "mediumorchid3": "rgb(180, 82, 205)",
  "mediumorchid4": "rgb(122, 55, 139)",
  "mediumpurple": "rgb(147, 112, 219)",
  "mediumpurple1": "rgb(171, 130, 255)",
  "mediumpurple2": "rgb(159, 121, 238)",
  "mediumpurple3": "rgb(137, 104, 205)",
  "mediumpurple4": "rgb(93, 71, 139)",
  "mediumseagreen": "rgb(60, 179, 113)",
  "mediumslateblue": "rgb(123, 104, 238)",
  "mediumspringgreen": "rgb(0, 250, 154)",
  "mediumturquoise": "rgb(72, 209, 204)",
  "mediumvioletred": "rgb(199, 21, 133)",
  "midnightblue": "rgb(25, 25, 112)",
  "mintcream": "rgb(245, 255, 250)",
  "mistyrose": "rgb(255, 228, 225)",
  "mistyrose1": "rgb(255, 228, 225)",
  "mistyrose2": "rgb(238, 213, 210)",
  "mistyrose3": "rgb(205, 183, 181)",
  "mistyrose4": "rgb(139, 125, 123)",
  "moccasin": "rgb(255, 228, 181)",
  "navajowhite": "rgb(255, 222, 173)",
  "navajowhite1": "rgb(255, 222, 173)",
  "navajowhite2": "rgb(238, 207, 161)",
  "navajowhite3": "rgb(205, 179, 139)",
  "navajowhite4": "rgb(139, 121, 94)",
  "navy": "rgb(0, 0, 128)",
  "navyblue": "rgb(0, 0, 128)",
  "oldlace": "rgb(253, 245, 230)",
  "olivedrab": "rgb(107, 142, 35)",
  "olivedrab1": "rgb(192, 255, 62)",
  "olivedrab2": "rgb(179, 238, 58)",
  "olivedrab3": "rgb(154, 205, 50)",
  "olivedrab4": "rgb(105, 139, 34)",
  "orange": "rgb(255, 165, 0)",
  "orange1": "rgb(255, 165, 0)",
  "orange2": "rgb(238, 154, 0)",
  "orange3": "rgb(205, 133, 0)",
  "orange4": "rgb(139, 90, 0)",
  "orangered": "rgb(255, 69, 0)",
  "orangered1": "rgb(255, 69, 0)",
  "orangered2": "rgb(238, 64, 0)",
  "orangered3": "rgb(205, 55, 0)",
  "orangered4": "rgb(139, 37, 0)",
  "orchid": "rgb(218, 112, 214)",
  "orchid1": "rgb(255, 131, 250)",
  "orchid2": "rgb(238, 122, 233)",
  "orchid3": "rgb(205, 105, 201)",
  "orchid4": "rgb(139, 71, 137)",
  "palegoldenrod": "rgb(238, 232, 170)",
  "palegreen": "rgb(152, 251, 152)",
  "palegreen1": "rgb(154, 255, 154)",
  "palegreen2": "rgb(144, 238, 144)",
  "palegreen3": "rgb(124, 205, 124)",
  "palegreen4": "rgb(84, 139, 84)",
  "paleturquoise": "rgb(175, 238, 238)",
  "paleturquoise1": "rgb(187, 255, 255)",
  "paleturquoise2": "rgb(174, 238, 238)",
  "paleturquoise3": "rgb(150, 205, 205)",
  "paleturquoise4": "rgb(102, 139, 139)",
  "palevioletred": "rgb(219, 112, 147)",
  "palevioletred1": "rgb(255, 130, 171)",
  "palevioletred2": "rgb(238, 121, 159)",
  "palevioletred3": "rgb(205, 104, 137)",
  "palevioletred4": "rgb(139, 71, 93)",
  "papayawhip": "rgb(255, 239, 213)",
  "peachpuff": "rgb(255, 218, 185)",
  "peachpuff1": "rgb(255, 218, 185)",
  "peachpuff2": "rgb(238, 203, 173)",
  "peachpuff3": "rgb(205, 175, 149)",
  "peachpuff4": "rgb(139, 119, 101)",
  "peru": "rgb(205, 133, 63)",
  "pink": "rgb(255, 192, 203)",
  "pink1": "rgb(255, 181, 197)",
  "pink2": "rgb(238, 169, 184)",
  "pink3": "rgb(205, 145, 158)",
  "pink4": "rgb(139, 99, 108)",
  "plum": "rgb(221, 160, 221)",
  "plum1": "rgb(255, 187, 255)",
  "plum2": "rgb(238, 174, 238)",
  "plum3": "rgb(205, 150, 205)",
  "plum4": "rgb(139, 102, 139)",
  "powderblue": "rgb(176, 224, 230)",
  "purple": "rgb(160, 32, 240)",
  "purple1": "rgb(155, 48, 255)",
  "purple2": "rgb(145, 44, 238)",
  "purple3": "rgb(125, 38, 205)",
  "purple4": "rgb(85, 26, 139)",
  "red": "rgb(255, 0, 0)",
  "red1": "rgb(255, 0, 0)",
  "red2": "rgb(238, 0, 0)",
  "red3": "rgb(205, 0, 0)",
  "red4": "rgb(139, 0, 0)",
  "rosybrown": "rgb(188, 143, 143)",
  "rosybrown1": "rgb(255, 193, 193)",
  "rosybrown2": "rgb(238, 180, 180)",
  "rosybrown3": "rgb(205, 155, 155)",
  "rosybrown4": "rgb(139, 105, 105)",
  "royalblue": "rgb(65, 105, 225)",
  "royalblue1": "rgb(72, 118, 255)",
  "royalblue2": "rgb(67, 110, 238)",
  "royalblue3": "rgb(58, 95, 205)",
  "royalblue4": "rgb(39, 64, 139)",
  "saddlebrown": "rgb(139, 69, 19)",
  "salmon": "rgb(250, 128, 114)",
  "salmon1": "rgb(255, 140, 105)",
  "salmon2": "rgb(238, 130, 98)",
  "salmon3": "rgb(205, 112, 84)",
  "salmon4": "rgb(139, 76, 57)",
  "sandybrown": "rgb(244, 164, 96)",
  "seagreen": "rgb(46, 139, 87)",
  "seagreen1": "rgb(84, 255, 159)",
  "seagreen2": "rgb(78, 238, 148)",
  "seagreen3": "rgb(67, 205, 128)",
  "seagreen4": "rgb(46, 139, 87)",
  "seashell": "rgb(255, 245, 238)",
  "seashell1": "rgb(255, 245, 238)",
  "seashell2": "rgb(238, 229, 222)",
  "seashell3": "rgb(205, 197, 191)",
  "seashell4": "rgb(139, 134, 130)",
  "sienna": "rgb(160, 82, 45)",
  "sienna1": "rgb(255, 130, 71)",
  "sienna2": "rgb(238, 121, 66)",
  "sienna3": "rgb(205, 104, 57)",
  "sienna4": "rgb(139, 71, 38)",
  "skyblue": "rgb(135, 206, 235)",
  "skyblue1": "rgb(135, 206, 255)",
  "skyblue2": "rgb(126, 192, 238)",
  "skyblue3": "rgb(108, 166, 205)",
  "skyblue4": "rgb(74, 112, 139)",
  "slateblue": "rgb(106, 90, 205)",
  "slateblue1": "rgb(131, 111, 255)",
  "slateblue2": "rgb(122, 103, 238)",
  "slateblue3": "rgb(105, 89, 205)",
  "slateblue4": "rgb(71, 60, 139)",
  "slategray": "rgb(112, 128, 144)",
  "slategray1": "rgb(198, 226, 255)",
  "slategray2": "rgb(185, 211, 238)",
  "slategray3": "rgb(159, 182, 205)",
  "slategray4": "rgb(108, 123, 139)",
  "slategrey": "rgb(112, 128, 144)",
  "snow": "rgb(255, 250, 250)",
  "snow1": "rgb(255, 250, 250)",
  "snow2": "rgb(238, 233, 233)",
  "snow3": "rgb(205, 201, 201)",
  "snow4": "rgb(139, 137, 137)",
  "springgreen": "rgb(0, 255, 127)",
  "springgreen1": "rgb(0, 255, 127)",
  "springgreen2": "rgb(0, 238, 118)",
  "springgreen3": "rgb(0, 205, 102)",
  "springgreen4": "rgb(0, 139, 69)",
  "steelblue": "rgb(70, 130, 180)",
  "steelblue1": "rgb(99, 184, 255)",
  "steelblue2": "rgb(92, 172, 238)",
  "steelblue3": "rgb(79, 148, 205)",
  "steelblue4": "rgb(54, 100, 139)",
  "tan": "rgb(210, 180, 140)",
  "tan1": "rgb(255, 165, 79)",
  "tan2": "rgb(238, 154, 73)",
  "tan3": "rgb(205, 133, 63)",
  "tan4": "rgb(139, 90, 43)",
  "thistle": "rgb(216, 191, 216)",
  "thistle1": "rgb(255, 225, 255)",
  "thistle2": "rgb(238, 210, 238)",
  "thistle3": "rgb(205, 181, 205)",
  "thistle4": "rgb(139, 123, 139)",
  "tomato": "rgb(255, 99, 71)",
  "tomato1": "rgb(255, 99, 71)",
  "tomato2": "rgb(238, 92, 66)",
  "tomato3": "rgb(205, 79, 57)",
  "tomato4": "rgb(139, 54, 38)",
  "turquoise": "rgb(64, 224, 208)",
  "turquoise1": "rgb(0, 245, 255)",
  "turquoise2": "rgb(0, 229, 238)",
  "turquoise3": "rgb(0, 197, 205)",
  "turquoise4": "rgb(0, 134, 139)",
  "violet": "rgb(238, 130, 238)",
  "violetred": "rgb(208, 32, 144)",
  "violetred1": "rgb(255, 62, 150)",
  "violetred2": "rgb(238, 58, 140)",
  "violetred3": "rgb(205, 50, 120)",
  "violetred4": "rgb(139, 34, 82)",
  "wheat": "rgb(245, 222, 179)",
  "wheat1": "rgb(255, 231, 186)",
  "wheat2": "rgb(238, 216, 174)",
  "wheat3": "rgb(205, 186, 150)",
  "wheat4": "rgb(139, 126, 102)",
  "white": "rgb(255, 255, 255)",
  "whitesmoke": "rgb(245, 245, 245)",
  "yellow": "rgb(255, 255, 0)",
  "yellow1": "rgb(255, 255, 0)",
  "yellow2": "rgb(238, 238, 0)",
  "yellow3": "rgb(205, 205, 0)",
  "yellow4": "rgb(139, 139, 0)",
  "yellowgreen": "rgb(154, 205, 50)"
};
// SOURCE FILE: libdot/js/lib_f.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Grab bag of utility functions.
 */
lib.f = {};

/**
 * Replace variable references in a string.
 *
 * Variables are of the form %FUNCTION(VARNAME).  FUNCTION is an optional
 * escape function to apply to the value.
 *
 * For example
 *   lib.f.replaceVars("%(greeting), %encodeURIComponent(name)",
 *                     { greeting: "Hello",
 *                       name: "Google+" });
 *
 * Will result in "Hello, Google%2B".
 */
lib.f.replaceVars = function(str, vars) {
  return str.replace(/%([a-z]*)\(([^\)]+)\)/gi, function(match, fn, varname) {
      if (typeof vars[varname] == 'undefined')
        throw 'Unknown variable: ' + varname;

      var rv = vars[varname];

      if (fn in lib.f.replaceVars.functions) {
        rv = lib.f.replaceVars.functions[fn](rv);
      } else if (fn) {
        throw 'Unknown escape function: ' + fn;
      }

      return rv;
    });
};

/**
 * Functions that can be used with replaceVars.
 *
 * Clients can add to this list to extend lib.f.replaceVars().
 */
lib.f.replaceVars.functions = {
  encodeURI: encodeURI,
  encodeURIComponent: encodeURIComponent,
  escapeHTML: function(str) {
    var map = {
      '<': '&lt;',
      '>': '&gt;',
      '&': '&amp;',
      '"': '&quot;',
      "'": '&#39;'
    };

    return str.replace(/[<>&\"\']/g, function(m) { return map[m] });
  }
};

/**
 * Get the list of accepted UI languages.
 *
 * @param {function(Array)} callback Function to invoke with the results.  The
 *     parameter is a list of locale names.
 */
lib.f.getAcceptLanguages = function(callback) {
  if (lib.f.getAcceptLanguages.chromeSupported()) {
    chrome.i18n.getAcceptLanguages(callback);
  } else {
    setTimeout(function() {
        callback([navigator.language.replace(/-/g, '_')]);
      }, 0);
  }
};

lib.f.getAcceptLanguages.chromeSupported = function() {
  return window.chrome && chrome.i18n;
};

/**
 * Parse a query string into a hash.
 *
 * This takes a url query string in the form 'name1=value&name2=value' and
 * converts it into an object of the form { name1: 'value', name2: 'value' }.
 * If a given name appears multiple times in the query string, only the
 * last value will appear in the result.
 *
 * Names and values are passed through decodeURIComponent before being added
 * to the result object.
 *
 * @param {string} queryString The string to parse.  If it starts with a
 *     leading '?', the '?' will be ignored.
 */
lib.f.parseQuery = function(queryString) {
  if (queryString.substr(0, 1) == '?')
    queryString = queryString.substr(1);

  var rv = {};

  var pairs = queryString.split('&');
  for (var i = 0; i < pairs.length; i++) {
    var pair = pairs[i].split('=');
    rv[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
  }

  return rv;
};

lib.f.getURL = function(path) {
  if (lib.f.getURL.chromeSupported())
    return chrome.runtime.getURL(path);

  return path;
};

lib.f.getURL.chromeSupported = function() {
  return window.chrome && chrome.runtime && chrome.runtime.getURL;
};

/**
 * Clamp a given integer to a specified range.
 *
 * @param {integer} v The value to be clamped.
 * @param {integer} min The minimum acceptable value.
 * @param {integer} max The maximum acceptable value.
 */
lib.f.clamp = function(v, min, max) {
  if (v < min)
    return min;
  if (v > max)
    return max;
  return v;
};

/**
 * Left pad a string to a given length using a given character.
 *
 * @param {string} str The string to pad.
 * @param {integer} length The desired length.
 * @param {string} opt_ch The optional padding character, defaults to ' '.
 * @return {string} The padded string.
 */
lib.f.lpad = function(str, length, opt_ch) {
  str = String(str);
  opt_ch = opt_ch || ' ';

  while (str.length < length)
    str = opt_ch + str;

  return str;
};

/**
 * Left pad a number to a given length with leading zeros.
 *
 * @param {string|integer} number The number to pad.
 * @param {integer} length The desired length.
 * @return {string} The padded number as a string.
 */
lib.f.zpad = function(number, length) {
  return lib.f.lpad(number, length, '0');
};

/**
 * Return a string containing a given number of space characters.
 *
 * This method maintains a static cache of the largest amount of whitespace
 * ever requested.  It shouldn't be used to generate an insanely huge amount of
 * whitespace.
 *
 * @param {integer} length The desired amount of whitespace.
 * @param {string} A string of spaces of the requested length.
 */
lib.f.getWhitespace = function(length) {
  if (length <= 0)
    return '';

  var f = this.getWhitespace;
  if (!f.whitespace)
    f.whitespace = '          ';

  while (length > f.whitespace.length) {
    f.whitespace += f.whitespace;
  }

  return f.whitespace.substr(0, length);
};

 /**
 * Ensure that a function is called within a certain time limit.
 *
 * Simple usage looks like this...
 *
 *  lib.registerInit(lib.f.alarm(onInit));
 *
 * This will log a warning to the console if onInit() is not invoked within
 * 5 seconds.
 *
 * If you're performing some operation that may take longer than 5 seconds you
 * can pass a duration in milliseconds as the optional second parameter.
 *
 * If you pass a string identifier instead of a callback function, you'll get a
 * wrapper generator rather than a single wrapper.  Each call to the
 * generator will return a wrapped version of the callback wired to
 * a shared timeout.  This is for cases where you want to ensure that at least
 * one of a set of callbacks is invoked before a timeout expires.
 *
 *   var alarm = lib.f.alarm('fetch object');
 *   lib.foo.fetchObject(alarm(onSuccess), alarm(onFailure));
 *
 * @param {function(*)} callback The function to wrap in an alarm.
 * @param {int} opt_ms Optional number of milliseconds to wait before raising
 *     an alarm.  Default is 5000 (5 seconds).
 * @return {function} If callback is a function then the return value will be
 *     the wrapped callback.  If callback is a string then the return value will
 *     be a function that generates new wrapped callbacks.
 */
lib.f.alarm = function(callback, opt_ms) {
  var ms = opt_ms || 5 * 1000;
  var stack = lib.f.getStack(1);

  return (function() {
    // This outer function is called immediately.  It's here to capture a new
    // scope for the timeout variable.

    // The 'timeout' variable is shared by this timeout function, and the
    // callback wrapper.
    var timeout = setTimeout(function() {
      var name = (typeof callback == 'string') ? name : callback.name;
      name = name ? (': ' + name) : '';
      console.warn('lib.f.alarm: timeout expired: ' + (ms / 1000) + 's' + name);
      console.log(stack);
      timeout = null;
    }, ms);

    var wrapperGenerator = function(callback) {
      return function() {
        if (timeout) {
          clearTimeout(timeout);
          timeout = null;
        }

        return callback.apply(null, arguments);
      }
    };

    if (typeof callback == 'string')
      return wrapperGenerator;

    return wrapperGenerator(callback);
  })();
};

/**
 * Return the current call stack after skipping a given number of frames.
 *
 * This method is intended to be used for debugging only.  It returns an
 * Object instead of an Array, because the console stringifies arrays by
 * default and that's not what we want.
 *
 * A typical call might look like...
 *
 *    console.log('Something wicked this way came', lib.f.getStack());
 *    //                         Notice the comma ^
 *
 * This would print the message to the js console, followed by an object
 * which can be clicked to reveal the stack.
 *
 * @param {number} opt_ignoreFrames The optional number of stack frames to
 *     ignore.  The actual 'getStack' call is always ignored.
 */
lib.f.getStack = function(opt_ignoreFrames) {
  var ignoreFrames = opt_ignoreFrames ? opt_ignoreFrames + 2 : 2;

  var stackArray;

  try {
    throw new Error();
  } catch (ex) {
    stackArray = ex.stack.split('\n');
  }

  var stackObject = {};
  for (var i = ignoreFrames; i < stackArray.length; i++) {
    stackObject[i - ignoreFrames] = stackArray[i].replace(/^\s*at\s+/, '');
  }

  return stackObject;
};

/**
 * Divides the two numbers and floors the results, unless the remainder is less
 * than an incredibly small value, in which case it returns the ceiling.
 * This is useful when the number are truncated approximations of longer
 * values, and so doing division with these numbers yields a result incredibly
 * close to a whole number.
 *
 * @param {number} numerator
 * @param {number} denominator
 * @return {number}
 */
lib.f.smartFloorDivide = function(numerator,  denominator) {
  var val = numerator / denominator;
  var ceiling = Math.ceil(val);
  if (ceiling - val < .0001) {
    return ceiling;
  } else {
    return Math.floor(val);
  }
};
// SOURCE FILE: libdot/js/lib_message_manager.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * MessageManager class handles internationalized strings.
 *
 * Note: chrome.i18n isn't sufficient because...
 *     1. There's a bug in chrome that makes it unavailable in iframes:
 *        https://crbug.com/130200
 *     2. The client code may not be packaged in a Chrome extension.
 *     3. The client code may be part of a library packaged in a third-party
 *        Chrome extension.
 *
 * @param {Array} languages List of languages to load, in the order they
 *     should be loaded.  Newer messages replace older ones.  'en' is
 *     automatically added as the first language if it is not already present.
 */
lib.MessageManager = function(languages) {
  this.languages_ = languages.map(
      function(el) { return el.replace(/-/g, '_') });

  if (this.languages_.indexOf('en') == -1)
    this.languages_.unshift('en');

  this.messages = {};
};

/**
 * Add message definitions to the message manager.
 *
 * This takes an object of the same format of a Chrome messages.json file.  See
 * <https://developer.chrome.com/extensions/i18n-messages>.
 */
lib.MessageManager.prototype.addMessages = function(defs) {
  for (var key in defs) {
    var def = defs[key];

    if (!def.placeholders) {
      this.messages[key] = def.message;
    } else {
      // Replace "$NAME$" placeholders with "$1", etc.
      this.messages[key] = def.message.replace(
          /\$([a-z][^\s\$]+)\$/ig,
          function(m, name) {
            return defs[key].placeholders[name.toLowerCase()].content;
          });
    }
  }
};

/**
 * Load the first available language message bundle.
 *
 * @param {string} pattern A url pattern containing a "$1" where the locale
 *     name should go.
 * @param {function(Array,Array)} onComplete Function to be called when loading
 *     is complete.  The two arrays are the list of successful and failed
 *     locale names.  If the first parameter is length 0, no locales were
 *     loaded.
 */
lib.MessageManager.prototype.findAndLoadMessages = function(
    pattern, onComplete) {
  var languages = this.languages_.concat();
  var loaded = [];
  var failed = [];

  function onLanguageComplete(state) {
    if (state) {
      loaded = languages.shift();
    } else {
      failed = languages.shift();
    }

    if (languages.length) {
      tryNextLanguage();
    } else {
      onComplete(loaded, failed);
    }
  }

  var tryNextLanguage = function() {
    this.loadMessages(this.replaceReferences(pattern, languages),
                      onLanguageComplete.bind(this, true),
                      onLanguageComplete.bind(this, false));
  }.bind(this);

  tryNextLanguage();
};

/**
 * Load messages from a messages.json file.
 */
lib.MessageManager.prototype.loadMessages = function(
    url, onSuccess, opt_onError) {
  var xhr = new XMLHttpRequest();

  xhr.onloadend = function() {
    if (xhr.status != 200) {
      if (opt_onError)
        opt_onError(xhr.status);

      return;
    }

    this.addMessages(JSON.parse(xhr.responseText));
    onSuccess();
  }.bind(this);

  xhr.open('GET', url);
  xhr.send();
};

/**
 * Replace $1...$n references with the elements of the args array.
 *
 * @param {string} msg String containing the message and argument references.
 * @param {Array} args Array containing the argument values.
 */
lib.MessageManager.replaceReferences = function(msg, args) {
  return msg.replace(/\$(\d+)/g, function (m, index) {
      return args[index - 1];
    });
};

/**
 * Per-instance copy of replaceReferences.
 */
lib.MessageManager.prototype.replaceReferences =
    lib.MessageManager.replaceReferences;

/**
 * Get a message by name, optionally replacing arguments too.
 *
 * @param {string} msgname String containing the name of the message to get.
 * @param {Array} opt_args Optional array containing the argument values.
 * @param {string} opt_default Optional value to return if the msgname is not
 *     found.  Returns the message name by default.
 */
lib.MessageManager.prototype.get = function(msgname, opt_args, opt_default) {
  var message;

  if (msgname in this.messages) {
    message = this.messages[msgname];

  } else {
    if (window.chrome.i18n)
      message = chrome.i18n.getMessage(msgname);

    if (!message) {
      console.warn('Unknown message: ' + msgname);
      return (typeof opt_default == 'undefined') ? msgname : opt_default;
    }
  }

  if (!opt_args)
    return message;

  if (!(opt_args instanceof Array))
    opt_args = [opt_args];

  return this.replaceReferences(message, opt_args);
};

/**
 * Process all of the "i18n" html attributes found in a given dom fragment.
 *
 * Each i18n attribute should contain a JSON object.  The keys are taken to
 * be attribute names, and the values are message names.
 *
 * If the JSON object has a "_" (underscore) key, it's value is used as the
 * textContent of the element.
 *
 * Message names can refer to other attributes on the same element with by
 * prefixing with a dollar sign.  For example...
 *
 *   <button id='send-button'
 *           i18n='{"aria-label": "$id", "_": "SEND_BUTTON_LABEL"}'
 *           ></button>
 *
 * The aria-label message name will be computed as "SEND_BUTTON_ARIA_LABEL".
 * Notice that the "id" attribute was appended to the target attribute, and
 * the result converted to UPPER_AND_UNDER style.
 */
lib.MessageManager.prototype.processI18nAttributes = function(dom) {
  // Convert the "lower-and-dashes" attribute names into
  // "UPPER_AND_UNDER" style.
  function thunk(str) { return str.replace(/-/g, '_').toUpperCase() }

  var nodes = dom.querySelectorAll('[i18n]');

  for (var i = 0; i < nodes.length; i++) {
    var node = nodes[i];
    var i18n = node.getAttribute('i18n');

    if (!i18n)
      continue;

    try {
      i18n = JSON.parse(i18n);
    } catch (ex) {
      console.error('Can\'t parse ' + node.tagName + '#' + node.id + ': ' +
                    i18n);
      throw ex;
    }

    for (var key in i18n) {
      var msgname = i18n[key];
      if (msgname.substr(0, 1) == '$')
        msgname = thunk(node.getAttribute(msgname.substr(1)) + '_' + key);

      var msg = this.get(msgname);
      if (key == '_') {
        node.textContent = msg;
      } else {
        node.setAttribute(key, msg);
      }
    }
  }
};
// SOURCE FILE: libdot/js/lib_preference_manager.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Constructor for lib.PreferenceManager objects.
 *
 * These objects deal with persisting changes to stable storage and notifying
 * consumers when preferences change.
 *
 * It is intended that the backing store could be something other than HTML5
 * storage, but there aren't any use cases at the moment.  In the future there
 * may be a chrome api to store sync-able name/value pairs, and we'd want
 * that.
 *
 * @param {lib.Storage.*} storage The storage object to use as a backing
 *     store.
 * @param {string} opt_prefix The optional prefix to be used for all preference
 *     names.  The '/' character should be used to separate levels of hierarchy,
 *     if you're going to have that kind of thing.  If provided, the prefix
 *     should start with a '/'.  If not provided, it defaults to '/'.
 */
lib.PreferenceManager = function(storage, opt_prefix) {
  this.storage = storage;
  this.storageObserver_ = this.onStorageChange_.bind(this);

  this.isActive_ = false;
  this.activate();

  this.trace = false;

  var prefix = opt_prefix || '/';
  if (prefix.substr(prefix.length - 1) != '/')
    prefix += '/';

  this.prefix = prefix;

  this.prefRecords_ = {};
  this.globalObservers_ = [];

  this.childFactories_ = {};

  // Map of list-name to {map of child pref managers}
  // As in...
  //
  //  this.childLists_ = {
  //    'profile-ids': {
  //      'one': PreferenceManager,
  //      'two': PreferenceManager,
  //      ...
  //    },
  //
  //    'frob-ids': {
  //      ...
  //    }
  //  }
  this.childLists_ = {};
};

/**
 * Used internally to indicate that the current value of the preference should
 * be taken from the default value defined with the preference.
 *
 * Equality tests against this value MUST use '===' or '!==' to be accurate.
 */
lib.PreferenceManager.prototype.DEFAULT_VALUE = new String('DEFAULT');

/**
 * An individual preference.
 *
 * These objects are managed by the PreferenceManager, you shouldn't need to
 * handle them directly.
 */
lib.PreferenceManager.Record = function(name, defaultValue) {
  this.name = name;
  this.defaultValue = defaultValue;
  this.currentValue = this.DEFAULT_VALUE;
  this.observers = [];
};

/**
 * A local copy of the DEFAULT_VALUE constant to make it less verbose.
 */
lib.PreferenceManager.Record.prototype.DEFAULT_VALUE =
    lib.PreferenceManager.prototype.DEFAULT_VALUE;

/**
 * Register a callback to be invoked when this preference changes.
 *
 * @param {function(value, string, lib.PreferenceManager} observer The function
 *     to invoke.  It will receive the new value, the name of the preference,
 *     and a reference to the PreferenceManager as parameters.
 */
lib.PreferenceManager.Record.prototype.addObserver = function(observer) {
  this.observers.push(observer);
};

/**
 * Unregister an observer callback.
 *
 * @param {function} observer A previously registered callback.
 */
lib.PreferenceManager.Record.prototype.removeObserver = function(observer) {
  var i = this.observers.indexOf(observer);
  if (i >= 0)
    this.observers.splice(i, 1);
};

/**
 * Fetch the value of this preference.
 */
lib.PreferenceManager.Record.prototype.get = function() {
  if (this.currentValue === this.DEFAULT_VALUE) {
    if (/^(string|number)$/.test(typeof this.defaultValue))
      return this.defaultValue;

    if (typeof this.defaultValue == 'object') {
      // We want to return a COPY of the default value so that users can
      // modify the array or object without changing the default value.
      return JSON.parse(JSON.stringify(this.defaultValue));
    }

    return this.defaultValue;
  }

  return this.currentValue;
};

/**
 * Stop this preference manager from tracking storage changes.
 *
 * Call this if you're going to swap out one preference manager for another so
 * that you don't get notified about irrelevant changes.
 */
lib.PreferenceManager.prototype.deactivate = function() {
  if (!this.isActive_)
    throw new Error('Not activated');

  this.isActive_ = false;
  this.storage.removeObserver(this.storageObserver_);
};

/**
 * Start tracking storage changes.
 *
 * If you previously deactivated this preference manager, you can reactivate it
 * with this method.  You don't need to call this at initialization time, as
 * it's automatically called as part of the constructor.
 */
lib.PreferenceManager.prototype.activate = function() {
  if (this.isActive_)
    throw new Error('Already activated');

  this.isActive_ = true;
  this.storage.addObserver(this.storageObserver_);
};

/**
 * Read the backing storage for these preferences.
 *
 * You should do this once at initialization time to prime the local cache
 * of preference values.  The preference manager will monitor the backing
 * storage for changes, so you should not need to call this more than once.
 *
 * This function recursively reads storage for all child preference managers as
 * well.
 *
 * This function is asynchronous, if you need to read preference values, you
 * *must* wait for the callback.
 *
 * @param {function()} opt_callback Optional function to invoke when the read
 *     has completed.
 */
lib.PreferenceManager.prototype.readStorage = function(opt_callback) {
  var pendingChildren = 0;

  function onChildComplete() {
    if (--pendingChildren == 0 && opt_callback)
      opt_callback();
  }

  var keys = Object.keys(this.prefRecords_).map(
      function(el) { return this.prefix + el }.bind(this));

  if (this.trace)
    console.log('Preferences read: ' + this.prefix);

  this.storage.getItems(keys, function(items) {
      var prefixLength = this.prefix.length;

      for (var key in items) {
        var value = items[key];
        var name = key.substr(prefixLength);
        var needSync = (name in this.childLists_ &&
                        (JSON.stringify(value) !=
                         JSON.stringify(this.prefRecords_[name].currentValue)));

        this.prefRecords_[name].currentValue = value;

        if (needSync) {
          pendingChildren++;
          this.syncChildList(name, onChildComplete);
        }
      }

      if (pendingChildren == 0 && opt_callback)
        setTimeout(opt_callback);
    }.bind(this));
};

/**
 * Define a preference.
 *
 * This registers a name, default value, and onChange handler for a preference.
 *
 * @param {string} name The name of the preference.  This will be prefixed by
 *     the prefix of this PreferenceManager before written to local storage.
 * @param {string|number|boolean|Object|Array|null} value The default value of
 *     this preference.  Anything that can be represented in JSON is a valid
 *     default value.
 * @param {function(value, string, lib.PreferenceManager} opt_observer A
 *     function to invoke when the preference changes.  It will receive the new
 *     value, the name of the preference, and a reference to the
 *     PreferenceManager as parameters.
 */
lib.PreferenceManager.prototype.definePreference = function(
    name, value, opt_onChange) {

  var record = this.prefRecords_[name];
  if (record) {
    this.changeDefault(name, value);
  } else {
    record = this.prefRecords_[name] =
        new lib.PreferenceManager.Record(name, value);
  }

  if (opt_onChange)
    record.addObserver(opt_onChange);
};

/**
 * Define multiple preferences with a single function call.
 *
 * @param {Array} defaults An array of 3-element arrays.  Each three element
 *     array should contain the [key, value, onChange] parameters for a
 *     preference.
 */
lib.PreferenceManager.prototype.definePreferences = function(defaults) {
  for (var i = 0; i < defaults.length; i++) {
    this.definePreference(defaults[i][0], defaults[i][1], defaults[i][2]);
  }
};

/**
 * Define an ordered list of child preferences.
 *
 * Child preferences are different from just storing an array of JSON objects
 * in that each child is an instance of a preference manager.  This means you
 * can observe changes to individual child preferences, and get some validation
 * that you're not reading or writing to an undefined child preference value.
 *
 * @param {string} listName A name for the list of children.  This must be
 *     unique in this preference manager.  The listName will become a
 *     preference on this PreferenceManager used to store the ordered list of
 *     child ids.  It is also used in get/add/remove operations to identify the
 *     list of children to operate on.
 * @param {function} childFactory A function that will be used to generate
 *     instances of these children.  The factory function will receive the
 *     parent lib.PreferenceManager object and a unique id for the new child
 *     preferences.
 */
lib.PreferenceManager.prototype.defineChildren = function(
    listName, childFactory) {

  // Define a preference to hold the ordered list of child ids.
  this.definePreference(listName, [],
                        this.onChildListChange_.bind(this, listName));
  this.childFactories_[listName] = childFactory;
  this.childLists_[listName] = {};
};

/**
 * Register to observe preference changes.
 *
 * @param {Function} global A callback that will happen for every preference.
 *     Pass null if you don't need one.
 * @param {Object} map A map of preference specific callbacks.  Pass null if
 *     you don't need any.
 */
lib.PreferenceManager.prototype.addObservers = function(global, map) {
  if (global && typeof global != 'function')
    throw new Error('Invalid param: globals');

  if (global)
    this.globalObservers_.push(global);

  if (!map)
    return;

  for (var name in map) {
    if (!(name in this.prefRecords_))
      throw new Error('Unknown preference: ' + name);

    this.prefRecords_[name].addObserver(map[name]);
  }
};

/**
 * Dispatch the change observers for all known preferences.
 *
 * It may be useful to call this after readStorage completes, in order to
 * get application state in sync with user preferences.
 *
 * This can be used if you've changed a preference manager out from under
 * a live object, for example when switching to a different prefix.
 */
lib.PreferenceManager.prototype.notifyAll = function() {
  for (var name in this.prefRecords_) {
    this.notifyChange_(name);
  }
};

/**
 * Notify the change observers for a given preference.
 *
 * @param {string} name The name of the preference that changed.
 */
lib.PreferenceManager.prototype.notifyChange_ = function(name) {
  var record = this.prefRecords_[name];
  if (!record)
    throw new Error('Unknown preference: ' + name);

  var currentValue = record.get();

  for (var i = 0; i < this.globalObservers_.length; i++)
    this.globalObservers_[i](name, currentValue);

  for (var i = 0; i < record.observers.length; i++) {
    record.observers[i](currentValue, name, this);
  }
};

/**
 * Create a new child PreferenceManager for the given child list.
 *
 * The optional hint parameter is an opaque prefix added to the auto-generated
 * unique id for this child.  Your child factory can parse out the prefix
 * and use it.
 *
 * @param {string} listName The child list to create the new instance from.
 * @param {string} opt_hint Optional hint to include in the child id.
 * @param {string} opt_id Optional id to override the generated id.
 */
lib.PreferenceManager.prototype.createChild = function(listName, opt_hint,
                                                       opt_id) {
  var ids = this.get(listName);
  var id;

  if (opt_id) {
    id = opt_id;
    if (ids.indexOf(id) != -1)
      throw new Error('Duplicate child: ' + listName + ': ' + id);

  } else {
    // Pick a random, unique 4-digit hex identifier for the new profile.
    while (!id || ids.indexOf(id) != -1) {
      id = Math.floor(Math.random() * 0xffff + 1).toString(16);
      id = lib.f.zpad(id, 4);
      if (opt_hint)
        id = opt_hint + ':' + id;
    }
  }

  var childManager = this.childFactories_[listName](this, id);
  childManager.trace = this.trace;
  childManager.resetAll();

  this.childLists_[listName][id] = childManager;

  ids.push(id);
  this.set(listName, ids);

  return childManager;
};

/**
 * Remove a child preferences instance.
 *
 * Removes a child preference manager and clears any preferences stored in it.
 *
 * @param {string} listName The name of the child list containing the child to
 *     remove.
 * @param {string} id The child ID.
 */
lib.PreferenceManager.prototype.removeChild = function(listName, id) {
  var prefs = this.getChild(listName, id);
  prefs.resetAll();

  var ids = this.get(listName);
  var i = ids.indexOf(id);
  if (i != -1) {
    ids.splice(i, 1);
    this.set(listName, ids);
  }

  delete this.childLists_[listName][id];
};

/**
 * Return a child PreferenceManager instance for a given id.
 *
 * If the child list or child id is not known this will return the specified
 * default value or throw an exception if no default value is provided.
 *
 * @param {string} listName The child list to look in.
 * @param {string} id The child ID.
 * @param {*} opt_default The optional default value to return if the child
 *     is not found.
 */
lib.PreferenceManager.prototype.getChild = function(listName, id, opt_default) {
  if (!(listName in this.childLists_))
    throw new Error('Unknown child list: ' + listName);

  var childList = this.childLists_[listName];
  if (!(id in childList)) {
    if (typeof opt_default == 'undefined')
      throw new Error('Unknown "' + listName + '" child: ' + id);

    return opt_default;
  }

  return childList[id];
};

/**
 * Calculate the difference between two lists of child ids.
 *
 * Given two arrays of child ids, this function will return an object
 * with "added", "removed", and "common" properties.  Each property is
 * a map of child-id to `true`.  For example, given...
 *
 *    a = ['child-x', 'child-y']
 *    b = ['child-y']
 *
 *    diffChildLists(a, b) =>
 *      { added: { 'child-x': true }, removed: {}, common: { 'child-y': true } }
 *
 * The added/removed properties assume that `a` is the current list.
 *
 * @param {Array[string]} a The most recent list of child ids.
 * @param {Array[string]} b An older list of child ids.
 * @return {Object} An object with added/removed/common properties.
 */
lib.PreferenceManager.diffChildLists = function(a, b) {
  var rv = {
    added: {},
    removed: {},
    common: {},
  };

  for (var i = 0; i < a.length; i++) {
    if (b.indexOf(a[i]) != -1) {
      rv.common[a[i]] = true;
    } else {
      rv.added[a[i]] = true;
    }
  }

  for (var i = 0; i < b.length; i++) {
    if ((b[i] in rv.added) || (b[i] in rv.common))
      continue;

    rv.removed[b[i]] = true;
  }

  return rv;
};

/**
 * Synchronize a list of child PreferenceManagers instances with the current
 * list stored in prefs.
 *
 * This will instantiate any missing managers and read current preference values
 * from storage.  Any active managers that no longer appear in preferences will
 * be deleted.
 *
 * @param {string} listName The child list to synchronize.
 * @param {function()} opt_callback Optional function to invoke when the sync
 *     is complete.
 */
lib.PreferenceManager.prototype.syncChildList = function(
    listName, opt_callback) {

  var pendingChildren = 0;
  function onChildStorage() {
    if (--pendingChildren == 0 && opt_callback)
      opt_callback();
  }

  // The list of child ids that we *should* have a manager for.
  var currentIds = this.get(listName);

  // The known managers at the start of the sync.  Any manager still in this
  // list at the end should be discarded.
  var oldIds = Object.keys(this.childLists_[listName]);

  var rv = lib.PreferenceManager.diffChildLists(currentIds, oldIds);

  for (var i = 0; i < currentIds.length; i++) {
    var id = currentIds[i];

    var managerIndex = oldIds.indexOf(id);
    if (managerIndex >= 0)
      oldIds.splice(managerIndex, 1);

    if (!this.childLists_[listName][id]) {
      var childManager = this.childFactories_[listName](this, id);
      if (!childManager) {
        console.warn('Unable to restore child: ' + listName + ': ' + id);
        continue;
      }

      childManager.trace = this.trace;
      this.childLists_[listName][id] = childManager;
      pendingChildren++;
      childManager.readStorage(onChildStorage);
    }
  }

  for (var i = 0; i < oldIds.length; i++) {
    delete this.childLists_[listName][oldIds[i]];
  }

  if (!pendingChildren && opt_callback)
    setTimeout(opt_callback);
};

/**
 * Reset a preference to its default state.
 *
 * This will dispatch the onChange handler if the preference value actually
 * changes.
 *
 * @param {string} name The preference to reset.
 */
lib.PreferenceManager.prototype.reset = function(name) {
  var record = this.prefRecords_[name];
  if (!record)
    throw new Error('Unknown preference: ' + name);

  this.storage.removeItem(this.prefix + name);

  if (record.currentValue !== this.DEFAULT_VALUE) {
    record.currentValue = this.DEFAULT_VALUE;
    this.notifyChange_(name);
  }
};

/**
 * Reset all preferences back to their default state.
 */
lib.PreferenceManager.prototype.resetAll = function() {
  var changed = [];

  for (var listName in this.childLists_) {
    var childList = this.childLists_[listName];
    for (var id in childList) {
      childList[id].resetAll();
    }
  }

  for (var name in this.prefRecords_) {
    if (this.prefRecords_[name].currentValue !== this.DEFAULT_VALUE) {
      this.prefRecords_[name].currentValue = this.DEFAULT_VALUE;
      changed.push(name);
    }
  }

  var keys = Object.keys(this.prefRecords_).map(function(el) {
      return this.prefix + el;
  }.bind(this));

  this.storage.removeItems(keys);

  changed.forEach(this.notifyChange_.bind(this));
};

/**
 * Return true if two values should be considered not-equal.
 *
 * If both values are the same scalar type and compare equal this function
 * returns false (no difference), otherwise return true.
 *
 * This is used in places where we want to check if a preference has changed.
 * Rather than take the time to compare complex values we just consider them
 * to always be different.
 *
 * @param {*} a A value to compare.
 * @param {*} b A value to compare.
 */
lib.PreferenceManager.prototype.diff = function(a, b) {
  // If the types are different, or the type is not a simple primitive one.
  if ((typeof a) !== (typeof b) ||
      !(/^(undefined|boolean|number|string)$/.test(typeof a))) {
    return true;
  }

  return a !== b;
};

/**
 * Change the default value of a preference.
 *
 * This is useful when subclassing preference managers.
 *
 * The function does not alter the current value of the preference, unless
 * it has the old default value.  When that happens, the change observers
 * will be notified.
 *
 * @param {string} name The name of the parameter to change.
 * @param {*} newValue The new default value for the preference.
 */
lib.PreferenceManager.prototype.changeDefault = function(name, newValue) {
  var record = this.prefRecords_[name];
  if (!record)
    throw new Error('Unknown preference: ' + name);

  if (!this.diff(record.defaultValue, newValue)) {
    // Default value hasn't changed.
    return;
  }

  if (record.currentValue !== this.DEFAULT_VALUE) {
    // This pref has a specific value, just change the default and we're done.
    record.defaultValue = newValue;
    return;
  }

  record.defaultValue = newValue;

  this.notifyChange_(name);
};

/**
 * Change the default value of multiple preferences.
 *
 * @param {Object} map A map of name -> value pairs specifying the new default
 *     values.
 */
lib.PreferenceManager.prototype.changeDefaults = function(map) {
  for (var key in map) {
    this.changeDefault(key, map[key]);
  }
};

/**
 * Set a preference to a specific value.
 *
 * This will dispatch the onChange handler if the preference value actually
 * changes.
 *
 * @param {string} key The preference to set.
 * @param {*} value The value to set.  Anything that can be represented in
 *     JSON is a valid value.
 */
lib.PreferenceManager.prototype.set = function(name, newValue) {
  var record = this.prefRecords_[name];
  if (!record)
    throw new Error('Unknown preference: ' + name);

  var oldValue = record.get();

  if (!this.diff(oldValue, newValue))
    return;

  if (this.diff(record.defaultValue, newValue)) {
    record.currentValue = newValue;
    this.storage.setItem(this.prefix + name, newValue);
  } else {
    record.currentValue = this.DEFAULT_VALUE;
    this.storage.removeItem(this.prefix + name);
  }

  // We need to manually send out the notification on this instance.  If we
  // The storage event won't fire a notification because we've already changed
  // the currentValue, so it won't see a difference.  If we delayed changing
  // currentValue until the storage event, a pref read immediately after a write
  // would return the previous value.
  //
  // The notification is in a timeout so clients don't accidentally depend on
  // a synchronous notification.
  setTimeout(this.notifyChange_.bind(this, name), 0);
};

/**
 * Get the value of a preference.
 *
 * @param {string} key The preference to get.
 */
lib.PreferenceManager.prototype.get = function(name) {
  var record = this.prefRecords_[name];
  if (!record)
    throw new Error('Unknown preference: ' + name);

  return record.get();
};

/**
 * Return all non-default preferences as a JSON object.
 *
 * This includes any nested preference managers as well.
 */
lib.PreferenceManager.prototype.exportAsJson = function() {
  var rv = {};

  for (var name in this.prefRecords_) {
    if (name in this.childLists_) {
      rv[name] = [];
      var childIds = this.get(name);
      for (var i = 0; i < childIds.length; i++) {
        var id = childIds[i];
        rv[name].push({id: id, json: this.getChild(name, id).exportAsJson()});
      }

    } else {
      var record = this.prefRecords_[name];
      if (record.currentValue != this.DEFAULT_VALUE)
        rv[name] = record.currentValue;
    }
  }

  return rv;
};

/**
 * Import a JSON blob of preferences previously generated with exportAsJson.
 *
 * This will create nested preference managers as well.
 */
lib.PreferenceManager.prototype.importFromJson = function(json) {
  for (var name in json) {
    if (name in this.childLists_) {
      var childList = json[name];
      for (var i = 0; i < childList.length; i++) {
        var id = childList[i].id;

        var childPrefManager = this.childLists_[name][id];
        if (!childPrefManager)
          childPrefManager = this.createChild(name, null, id);

        childPrefManager.importFromJson(childList[i].json);
      }

    } else {
      this.set(name, json[name]);
    }
  }
};

/**
 * Called when one of the child list preferences changes.
 */
lib.PreferenceManager.prototype.onChildListChange_ = function(listName) {
  this.syncChildList(listName);
};

/**
 * Called when a key in the storage changes.
 */
lib.PreferenceManager.prototype.onStorageChange_ = function(map) {
  for (var key in map) {
    if (this.prefix) {
      if (key.lastIndexOf(this.prefix, 0) != 0)
        continue;
    }

    var name = key.substr(this.prefix.length);

    if (!(name in this.prefRecords_)) {
      // Sometimes we'll get notified about prefs that are no longer defined.
      continue;
    }

    var record = this.prefRecords_[name];

    var newValue = map[key].newValue;
    var currentValue = record.currentValue;
    if (currentValue === record.DEFAULT_VALUE)
      currentValue = (void 0);

    if (this.diff(currentValue, newValue)) {
      if (typeof newValue == 'undefined') {
        record.currentValue = record.DEFAULT_VALUE;
      } else {
        record.currentValue = newValue;
      }

      this.notifyChange_(name);
    }
  }
};
// SOURCE FILE: libdot/js/lib_resource.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Storage for canned resources.
 *
 * These are usually non-JavaScript things that are collected during a build
 * step and converted into a series of 'lib.resource.add(...)' calls.  See
 * the "@resource" directive from libdot/bin/concat.sh for the canonical use
 * case.
 *
 * This is global storage, so you should prefix your resource names to avoid
 * collisions.
 */
lib.resource = {
  resources_: {}
};

/**
 * Add a resource.
 *
 * @param {string} name A name for the resource.  You should prefix this to
 *   avoid collisions with resources from a shared library.
 * @param {string} type A mime type for the resource, or "raw" if not
 *   applicable.
 * @param {*} data The value of the resource.
 */
lib.resource.add = function(name, type, data) {
  lib.resource.resources_[name] = {
    type: type,
    name: name,
    data: data
  };
};

/**
 * Retrieve a resource record.
 *
 * The resource data is stored on the "data" property of the returned object.
 *
 * @param {string} name The name of the resource to get.
 * @param {*} opt_defaultValue The optional value to return if the resource is
 *   not defined.
 * @return {object} An object with "type", "name", and "data" properties.
 */
lib.resource.get = function(name, opt_defaultValue) {
  if (!(name in lib.resource.resources_)) {
    if (typeof opt_defaultValue == 'undefined')
      throw 'Unknown resource: ' + name;

    return opt_defaultValue;
  }

  return lib.resource.resources_[name];
};

/**
 * Retrieve resource data.
 *
 * @param {string} name The name of the resource to get.
 * @param {*} opt_defaultValue The optional value to return if the resource is
 *   not defined.
 * @return {*} The resource data.
 */
lib.resource.getData = function(name, opt_defaultValue) {
  if (!(name in lib.resource.resources_)) {
    if (typeof opt_defaultValue == 'undefined')
      throw 'Unknown resource: ' + name;

    return opt_defaultValue;
  }

  return lib.resource.resources_[name].data;
};

/**
 * Retrieve resource as a data: url.
 *
 * @param {string} name The name of the resource to get.
 * @param {*} opt_defaultValue The optional value to return if the resource is
 *   not defined.
 * @return {*} A data: url encoded version of the resource.
 */
lib.resource.getDataUrl = function(name, opt_defaultValue) {
  var resource = lib.resource.get(name, opt_defaultValue);
  return 'data:' + resource.type + ',' + resource.data;
};
// SOURCE FILE: libdot/js/lib_storage.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Namespace for implementations of persistent, possibly cloud-backed
 * storage.
 */
lib.Storage = new Object();
// SOURCE FILE: libdot/js/lib_storage_chrome.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * chrome.storage based class with an async interface that is interchangeable
 * with other lib.Storage.* implementations.
 */
lib.Storage.Chrome = function(storage) {
  this.storage_ = storage;
  this.observers_ = [];

  chrome.storage.onChanged.addListener(this.onChanged_.bind(this));
};

/**
 * Called by the storage implementation when the storage is modified.
 */
lib.Storage.Chrome.prototype.onChanged_ = function(changes, areaname) {
  if (chrome.storage[areaname] != this.storage_)
    return;

  for (var i = 0; i < this.observers_.length; i++) {
    this.observers_[i](changes);
  }
};

/**
 * Register a function to observe storage changes.
 *
 * @param {function(map)} callback The function to invoke when the storage
 *     changes.
 */
lib.Storage.Chrome.prototype.addObserver = function(callback) {
  this.observers_.push(callback);
};

/**
 * Unregister a change observer.
 *
 * @param {function} observer A previously registered callback.
 */
lib.Storage.Chrome.prototype.removeObserver = function(callback) {
  var i = this.observers_.indexOf(callback);
  if (i != -1)
    this.observers_.splice(i, 1);
};

/**
 * Delete everything in this storage.
 *
 * @param {function(map)} callback The function to invoke when the delete
 *     has completed.
 */
lib.Storage.Chrome.prototype.clear = function(opt_callback) {
  this.storage_.clear();

  if (opt_callback)
    setTimeout(opt_callback, 0);
};

/**
 * Return the current value of a storage item.
 *
 * @param {string} key The key to look up.
 * @param {function(value) callback The function to invoke when the value has
 *     been retrieved.
 */
lib.Storage.Chrome.prototype.getItem = function(key, callback) {
  this.storage_.get(key, callback);
};
/**
 * Fetch the values of multiple storage items.
 *
 * @param {Array} keys The keys to look up.
 * @param {function(map) callback The function to invoke when the values have
 *     been retrieved.
 */

lib.Storage.Chrome.prototype.getItems = function(keys, callback) {
  this.storage_.get(keys, callback);
};

/**
 * Set a value in storage.
 *
 * @param {string} key The key for the value to be stored.
 * @param {*} value The value to be stored.  Anything that can be serialized
 *     with JSON is acceptable.
 * @param {function()} opt_callback Optional function to invoke when the
 *     set is complete.  You don't have to wait for the set to complete in order
 *     to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Chrome.prototype.setItem = function(key, value, opt_callback) {
  var obj = {};
  obj[key] = value;
  this.storage_.set(obj, opt_callback);
};

/**
 * Set multiple values in storage.
 *
 * @param {Object} map A map of key/values to set in storage.
 * @param {function()} opt_callback Optional function to invoke when the
 *     set is complete.  You don't have to wait for the set to complete in order
 *     to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Chrome.prototype.setItems = function(obj, opt_callback) {
  this.storage_.set(obj, opt_callback);
};

/**
 * Remove an item from storage.
 *
 * @param {string} key The key to be removed.
 * @param {function()} opt_callback Optional function to invoke when the
 *     remove is complete.  You don't have to wait for the set to complete in
 *     order to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Chrome.prototype.removeItem = function(key, opt_callback) {
  this.storage_.remove(key, opt_callback);
};

/**
 * Remove multiple items from storage.
 *
 * @param {Array} keys The keys to be removed.
 * @param {function()} opt_callback Optional function to invoke when the
 *     remove is complete.  You don't have to wait for the set to complete in
 *     order to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Chrome.prototype.removeItems = function(keys, opt_callback) {
  this.storage_.remove(keys, opt_callback);
};
// SOURCE FILE: libdot/js/lib_storage_local.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * window.localStorage based class with an async interface that is
 * interchangeable with other lib.Storage.* implementations.
 */
lib.Storage.Local = function() {
  this.observers_ = [];
  this.storage_ = window.localStorage;
  window.addEventListener('storage', this.onStorage_.bind(this));
};

/**
 * Called by the storage implementation when the storage is modified.
 */
lib.Storage.Local.prototype.onStorage_ = function(e) {
  if (e.storageArea != this.storage_)
    return;

  // IE throws an exception if JSON.parse is given an empty string.
  var prevValue = e.oldValue ? JSON.parse(e.oldValue) : "";
  var curValue = e.newValue ? JSON.parse(e.newValue) : "";
  var o = {};
  o[e.key] = {
    oldValue: prevValue,
    newValue: curValue
  };

  for (var i = 0; i < this.observers_.length; i++) {
    this.observers_[i](o);
  }
};

/**
 * Register a function to observe storage changes.
 *
 * @param {function(map)} callback The function to invoke when the storage
 *     changes.
 */
lib.Storage.Local.prototype.addObserver = function(callback) {
  this.observers_.push(callback);
};

/**
 * Unregister a change observer.
 *
 * @param {function} observer A previously registered callback.
 */
lib.Storage.Local.prototype.removeObserver = function(callback) {
  var i = this.observers_.indexOf(callback);
  if (i != -1)
    this.observers_.splice(i, 1);
};

/**
 * Delete everything in this storage.
 *
 * @param {function(map)} callback The function to invoke when the delete
 *     has completed.
 */
lib.Storage.Local.prototype.clear = function(opt_callback) {
  this.storage_.clear();

  if (opt_callback)
    setTimeout(opt_callback, 0);
};

/**
 * Return the current value of a storage item.
 *
 * @param {string} key The key to look up.
 * @param {function(value) callback The function to invoke when the value has
 *     been retrieved.
 */
lib.Storage.Local.prototype.getItem = function(key, callback) {
  var value = this.storage_.getItem(key);

  if (typeof value == 'string') {
    try {
      value = JSON.parse(value);
    } catch (e) {
      // If we can't parse the value, just return it unparsed.
    }
  }

  setTimeout(callback.bind(null, value), 0);
};

/**
 * Fetch the values of multiple storage items.
 *
 * @param {Array} keys The keys to look up.
 * @param {function(map) callback The function to invoke when the values have
 *     been retrieved.
 */
lib.Storage.Local.prototype.getItems = function(keys, callback) {
  var rv = {};

  for (var i = keys.length - 1; i >= 0; i--) {
    var key = keys[i];
    var value = this.storage_.getItem(key);
    if (typeof value == 'string') {
      try {
        rv[key] = JSON.parse(value);
      } catch (e) {
        // If we can't parse the value, just return it unparsed.
        rv[key] = value;
      }
    } else {
      keys.splice(i, 1);
    }
  }

  setTimeout(callback.bind(null, rv), 0);
};

/**
 * Set a value in storage.
 *
 * @param {string} key The key for the value to be stored.
 * @param {*} value The value to be stored.  Anything that can be serialized
 *     with JSON is acceptable.
 * @param {function()} opt_callback Optional function to invoke when the
 *     set is complete.  You don't have to wait for the set to complete in order
 *     to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Local.prototype.setItem = function(key, value, opt_callback) {
  this.storage_.setItem(key, JSON.stringify(value));

  if (opt_callback)
  setTimeout(opt_callback, 0);
};

/**
 * Set multiple values in storage.
 *
 * @param {Object} map A map of key/values to set in storage.
 * @param {function()} opt_callback Optional function to invoke when the
 *     set is complete.  You don't have to wait for the set to complete in order
 *     to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Local.prototype.setItems = function(obj, opt_callback) {
  for (var key in obj) {
    this.storage_.setItem(key, JSON.stringify(obj[key]));
  }

  if (opt_callback)
  setTimeout(opt_callback, 0);
};

/**
 * Remove an item from storage.
 *
 * @param {string} key The key to be removed.
 * @param {function()} opt_callback Optional function to invoke when the
 *     remove is complete.  You don't have to wait for the set to complete in
 *     order to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Local.prototype.removeItem = function(key, opt_callback) {
  this.storage_.removeItem(key);

  if (opt_callback)
  setTimeout(opt_callback, 0);
};

/**
 * Remove multiple items from storage.
 *
 * @param {Array} keys The keys to be removed.
 * @param {function()} opt_callback Optional function to invoke when the
 *     remove is complete.  You don't have to wait for the set to complete in
 *     order to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Local.prototype.removeItems = function(ary, opt_callback) {
  for (var i = 0; i < ary.length; i++) {
    this.storage_.removeItem(ary[i]);
  }

  if (opt_callback)
  setTimeout(opt_callback, 0);
};
// SOURCE FILE: libdot/js/lib_storage_memory.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * In-memory storage class with an async interface that is interchangeable with
 * other lib.Storage.* implementations.
 */
lib.Storage.Memory = function() {
  this.observers_ = [];
  this.storage_ = {};
};

/**
 * Register a function to observe storage changes.
 *
 * @param {function(map)} callback The function to invoke when the storage
 *     changes.
 */
lib.Storage.Memory.prototype.addObserver = function(callback) {
  this.observers_.push(callback);
};

/**
 * Unregister a change observer.
 *
 * @param {function} observer A previously registered callback.
 */
lib.Storage.Memory.prototype.removeObserver = function(callback) {
  var i = this.observers_.indexOf(callback);
  if (i != -1)
    this.observers_.splice(i, 1);
};

/**
 * Delete everything in this storage.
 *
 * @param {function(map)} callback The function to invoke when the delete
 *     has completed.
 */
lib.Storage.Memory.prototype.clear = function(opt_callback) {
  var e = {};
  for (var key in this.storage_) {
    e[key] = {oldValue: this.storage_[key], newValue: (void 0)};
  }

  this.storage_ = {};

  setTimeout(function() {
    for (var i = 0; i < this.observers_.length; i++) {
      this.observers_[i](e);
    }
  }.bind(this), 0);

  if (opt_callback)
    setTimeout(opt_callback, 0);
};

/**
 * Return the current value of a storage item.
 *
 * @param {string} key The key to look up.
 * @param {function(value) callback The function to invoke when the value has
 *     been retrieved.
 */
lib.Storage.Memory.prototype.getItem = function(key, callback) {
  var value = this.storage_[key];

  if (typeof value == 'string') {
    try {
      value = JSON.parse(value);
    } catch (e) {
      // If we can't parse the value, just return it unparsed.
    }
  }

  setTimeout(callback.bind(null, value), 0);
};

/**
 * Fetch the values of multiple storage items.
 *
 * @param {Array} keys The keys to look up.
 * @param {function(map) callback The function to invoke when the values have
 *     been retrieved.
 */
lib.Storage.Memory.prototype.getItems = function(keys, callback) {
  var rv = {};

  for (var i = keys.length - 1; i >= 0; i--) {
    var key = keys[i];
    var value = this.storage_[key];
    if (typeof value == 'string') {
      try {
        rv[key] = JSON.parse(value);
      } catch (e) {
        // If we can't parse the value, just return it unparsed.
        rv[key] = value;
      }
    } else {
      keys.splice(i, 1);
    }
  }

  setTimeout(callback.bind(null, rv), 0);
};

/**
 * Set a value in storage.
 *
 * @param {string} key The key for the value to be stored.
 * @param {*} value The value to be stored.  Anything that can be serialized
 *     with JSON is acceptable.
 * @param {function()} opt_callback Optional function to invoke when the
 *     set is complete.  You don't have to wait for the set to complete in order
 *     to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Memory.prototype.setItem = function(key, value, opt_callback) {
  var oldValue = this.storage_[key];
  this.storage_[key] = JSON.stringify(value);

  var e = {};
  e[key] = {oldValue: oldValue, newValue: value};

  setTimeout(function() {
    for (var i = 0; i < this.observers_.length; i++) {
      this.observers_[i](e);
    }
  }.bind(this), 0);

  if (opt_callback)
  setTimeout(opt_callback, 0);
};

/**
 * Set multiple values in storage.
 *
 * @param {Object} map A map of key/values to set in storage.
 * @param {function()} opt_callback Optional function to invoke when the
 *     set is complete.  You don't have to wait for the set to complete in order
 *     to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Memory.prototype.setItems = function(obj, opt_callback) {
  var e = {};

  for (var key in obj) {
    e[key] = {oldValue: this.storage_[key], newValue: obj[key]};
    this.storage_[key] = JSON.stringify(obj[key]);
  }

  setTimeout(function() {
    for (var i = 0; i < this.observers_.length; i++) {
      this.observers_[i](e);
    }
  }.bind(this));

  if (opt_callback)
  setTimeout(opt_callback, 0);
};

/**
 * Remove an item from storage.
 *
 * @param {string} key The key to be removed.
 * @param {function()} opt_callback Optional function to invoke when the
 *     remove is complete.  You don't have to wait for the set to complete in
 *     order to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Memory.prototype.removeItem = function(key, opt_callback) {
  delete this.storage_[key];

  if (opt_callback)
  setTimeout(opt_callback, 0);
};

/**
 * Remove multiple items from storage.
 *
 * @param {Array} keys The keys to be removed.
 * @param {function()} opt_callback Optional function to invoke when the
 *     remove is complete.  You don't have to wait for the set to complete in
 *     order to read the value, since the local cache is updated synchronously.
 */
lib.Storage.Memory.prototype.removeItems = function(ary, opt_callback) {
  for (var i = 0; i < ary.length; i++) {
    delete this.storage_[ary[i]];
  }

  if (opt_callback)
  setTimeout(opt_callback, 0);
};
// SOURCE FILE: libdot/js/lib_test_manager.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * @fileoverview JavaScript unit testing framework for synchronous and
 *     asynchronous tests.
 *
 * This file contains the lib.TestManager and related classes.  At the moment
 * it's all collected in a single file since it's reasonably small
 * (=~1k lines), and it's a lot easier to include one file into your test
 * harness than it is to include seven.
 *
 * The following classes are defined...
 *
 *   lib.TestManager - The root class and entrypoint for creating test runs.
 *   lib.TestManager.Log - Logging service.
 *   lib.TestManager.Suite - A collection of tests.
 *   lib.TestManager.Test - A single test.
 *   lib.TestManager.TestRun - Manages the execution of a set of tests.
 *   lib.TestManager.Result - A single test result.
 */

/**
 * Root object in the unit test hierarchy, and keeper of the log object.
 *
 * @param {lib.TestManager.Log} opt_log Optional lib.TestManager.Log object.
 *     Logs to the JavaScript console if omitted.
 */
lib.TestManager = function(opt_log) {
  this.log = opt_log || new lib.TestManager.Log();
}

/**
 * Create a new test run object for this test manager.
 *
 * @param {Object} opt_cx An object to be passed to test suite setup(),
 *     preamble(), and test cases during this test run.  This object is opaque
 *     to lib.TestManager.* code.  It's entirely up to the test suite what it's
 *     used for.
 */
lib.TestManager.prototype.createTestRun = function(opt_cx) {
  return new lib.TestManager.TestRun(this, opt_cx);
};

/**
 * Called when a test run associated with this test manager completes.
 *
 * Clients may override this to call an appropriate function.
 */
lib.TestManager.prototype.onTestRunComplete = function(testRun) {};

/**
 * Called before a test associated with this test manager is run.
 *
 * @param {lib.TestManager.Result} result The result object for the upcoming
 *     test.
 * @param {Object} cx The context object for a test run.
 */
lib.TestManager.prototype.testPreamble = function(result, cx) {};

/**
 * Called after a test associated with this test manager finishes.
 *
 * @param {lib.TestManager.Result} result The result object for the finished
 *     test.
 * @param {Object} cx The context object for a test run.
 */
lib.TestManager.prototype.testPostamble = function(result, cx) {};

/**
 * Destination for test case output.
 *
 * @param {function(string)} opt_logFunction Optional function to call to
 *     write a string to the log.  If omitted, console.log is used.
 */
lib.TestManager.Log = function(opt_logFunction) {
  this.save = false;
  this.data = '';
  this.logFunction_ = opt_logFunction || function(s) {
    if (this.save)
      this.data += s + '\n';
    console.log(s);
  };
  this.pending_ = '';
  this.prefix_ = '';
  this.prefixStack_ = [];
};

/**
 * Add a prefix to log messages.
 *
 * This only affects log messages that are added after the prefix is pushed.
 *
 * @param {string} str The prefix to prepend to future log messages.
 */
lib.TestManager.Log.prototype.pushPrefix = function(str) {
  this.prefixStack_.push(str);
  this.prefix_ = this.prefixStack_.join('');
};

/**
 * Remove the most recently added message prefix.
 */
lib.TestManager.Log.prototype.popPrefix = function() {
  this.prefixStack_.pop();
  this.prefix_ = this.prefixStack_.join('');
};

/**
 * Queue up a string to print to the log.
 *
 * If a line is already pending, this string is added to it.
 *
 * The string is not actually printed to the log until flush() or println()
 * is called.  The following call sequence will result in TWO lines in the
 * log...
 *
 *   log.print('hello');
 *   log.print(' ');
 *   log.println('world');
 *
 * While a typical stream-like thing would result in 'hello world\n', this one
 * results in 'hello \nworld\n'.
 *
 * @param {string} str The string to add to the log.
 */
lib.TestManager.Log.prototype.print = function(str) {
  if (this.pending_) {
    this.pending_ += str;
  } else {
    this.pending_ = this.prefix_ + str;
  }
};

/**
 * Print a line to the log and flush it immediately.
 *
 * @param {string} str The string to add to the log.
 */
lib.TestManager.Log.prototype.println = function(str) {
  if (this.pending_)
    this.flush();

  this.logFunction_(this.prefix_ + str);
};

/**
 * Flush any pending log message.
 */
lib.TestManager.Log.prototype.flush = function() {
  if (!this.pending_)
    return;

  this.logFunction_(this.pending_);
  this.pending_ = '';
};

/**
 * Returns a new constructor function that will inherit from
 * lib.TestManager.Suite.
 *
 * Use this function to create a new test suite subclass.  It will return a
 * properly initialized constructor function for the subclass.  You can then
 * override the setup() and preamble() methods if necessary and add test cases
 * to the subclass.
 *
 *   var MyTests = new lib.TestManager.Suite('MyTests');
 *
 *   MyTests.prototype.setup = function(cx) {
 *     // Sets this.size to cx.size if it exists, or the default value of 10
 *     // if not.
 *     this.setDefault(cx, {size: 10});
 *   };
 *
 *   MyTests.prototype.preamble = function(result, cx) {
 *     // Some tests (even successful ones) may side-effect this list, so
 *     // recreate it before every test.
 *     this.list = [];
 *     for (var i = 0; i < this.size; i++) {
 *       this.list[i] = i;
 *     }
 *   };
 *
 *   // Basic synchronous test case.
 *   MyTests.addTest('pop-length', function(result, cx) {
 *       this.list.pop();
 *
 *       // If this assertion fails, the testcase will stop here.
 *       result.assertEQ(this.list.length, this.size - 1);
 *
 *       // A test must indicate it has passed by calling this method.
 *       result.pass();
 *     });
 *
 *   // Sample asynchronous test case.
 *   MyTests.addTest('async-pop-length', function(result, cx) {
 *       var self = this;
 *
 *       var callback = function() {
 *           result.assertEQ(self.list.length, self.size - 1);
 *           result.pass();
 *       };
 *
 *       // Wait 100ms to check the array length for the sake of this example.
 *       setTimeout(callback, 100);
 *
 *       this.list.pop();
 *
 *       // Indicate that this test needs another 200ms to complete.
 *       // If the test does not report pass/fail by then, it is considered to
 *       // have timed out.
 *       result.requestTime(200);
 *     });
 *
 *   ...
 *
 * @param {string} suiteName The name of the test suite.
 */
lib.TestManager.Suite = function(suiteName) {
  function ctor(testManager, cx) {
    this.testManager_ = testManager;
    this.suiteName = suiteName;

    this.setup(cx);
  }

  ctor.suiteName = suiteName;
  ctor.addTest = lib.TestManager.Suite.addTest;
  ctor.disableTest = lib.TestManager.Suite.disableTest;
  ctor.getTest = lib.TestManager.Suite.getTest;
  ctor.getTestList = lib.TestManager.Suite.getTestList;
  ctor.testList_ = [];
  ctor.testMap_ = {};
  ctor.prototype = { __proto__: lib.TestManager.Suite.prototype };

  lib.TestManager.Suite.subclasses.push(ctor);

  return ctor;
};

/**
 * List of lib.TestManager.Suite subclasses, in the order they were defined.
 */
lib.TestManager.Suite.subclasses = [];

/**
 * Add a test to a lib.TestManager.Suite.
 *
 * This method is copied to new subclasses when they are created.
 */
lib.TestManager.Suite.addTest = function(testName, testFunction) {
  if (testName in this.testMap_)
    throw 'Duplicate test name: ' + testName;

  var test = new lib.TestManager.Test(this, testName, testFunction);
  this.testMap_[testName] = test;
  this.testList_.push(test);
};

/**
 * Defines a disabled test.
 */
lib.TestManager.Suite.disableTest = function(testName, testFunction) {
  if (testName in this.testMap_)
    throw 'Duplicate test name: ' + testName;

  var test = new lib.TestManager.Test(this, testName, testFunction);
  console.log('Disabled test: ' + test.fullName);
};

/**
 * Get a lib.TestManager.Test instance by name.
 *
 * This method is copied to new subclasses when they are created.
 *
 * @param {string} testName The name of the desired test.
 * @return {lib.TestManager.Test} The requested test, or undefined if it was not
 *     found.
 */
lib.TestManager.Suite.getTest = function(testName) {
  return this.testMap_[testName];
};

/**
 * Get an array of lib.TestManager.Tests associated with this Suite.
 *
 * This method is copied to new subclasses when they are created.
 */
lib.TestManager.Suite.getTestList = function() {
  return this.testList_;
};

/**
 * Set properties on a test suite instance, pulling the property value from
 * the context if it exists and from the defaults dictionary if not.
 *
 * This is intended to be used in your test suite's setup() method to
 * define parameters for the test suite which may be overridden through the
 * context object.  For example...
 *
 *   MySuite.prototype.setup = function(cx) {
 *     this.setDefaults(cx, {size: 10});
 *   };
 *
 * If the context object has a 'size' property then this.size will be set to
 * the value of cx.size, otherwise this.size will get a default value of 10.
 *
 * @param {Object} cx The context object for a test run.
 * @param {Object} defaults An object containing name/value pairs to set on
 *     this test suite instance.  The value listed here will be used if the
 *     name is not defined on the context object.
 */
lib.TestManager.Suite.prototype.setDefaults = function(cx, defaults) {
  for (var k in defaults) {
    this[k] = (k in cx) ? cx[k] : defaults[k];
  }
};

/**
 * Subclassable method called to set up the test suite.
 *
 * The default implementation of this method is a no-op.  If your test suite
 * requires some kind of suite-wide setup, this is the place to do it.
 *
 * It's fine to store state on the test suite instance, that state will be
 * accessible to all tests in the suite.  If any test case fails, the entire
 * test suite object will be discarded and a new one will be created for
 * the remaining tests.
 *
 * Any side effects outside of this test suite instance must be idempotent.
 * For example, if you're adding DOM nodes to a document, make sure to first
 * test that they're not already there.  If they are, remove them rather than
 * reuse them.  You should not count on their state, since they were probably
 * left behind by a failed testcase.
 *
 * Any exception here will abort the remainder of the test run.
 *
 * @param {Object} cx The context object for a test run.
 */
lib.TestManager.Suite.prototype.setup = function(cx) {};

/**
 * Subclassable method called to do pre-test set up.
 *
 * The default implementation of this method is a no-op.  If your test suite
 * requires some kind of pre-test setup, this is the place to do it.
 *
 * This can be used to avoid a bunch of boilerplate setup/teardown code in
 * this suite's testcases.
 *
 * Any exception here will abort the remainder of the test run.
 *
 * @param {lib.TestManager.Result} result The result object for the upcoming
 *     test.
 * @param {Object} cx The context object for a test run.
 */
lib.TestManager.Suite.prototype.preamble = function(result, cx) {};

/**
 * Subclassable method called to do post-test tear-down.
 *
 * The default implementation of this method is a no-op.  If your test suite
 * requires some kind of pre-test setup, this is the place to do it.
 *
 * This can be used to avoid a bunch of boilerplate setup/teardown code in
 * this suite's testcases.
 *
 * Any exception here will abort the remainder of the test run.
 *
 * @param {lib.TestManager.Result} result The result object for the finished
 *     test.
 * @param {Object} cx The context object for a test run.
 */
lib.TestManager.Suite.prototype.postamble = function(result, cx) {};

/**
 * Object representing a single test in a test suite.
 *
 * These are created as part of the lib.TestManager.Suite.addTest() method.
 * You should never have to construct one by hand.
 *
 * @param {lib.TestManager.Suite} suiteClass The test suite class containing
 *     this test.
 * @param {string} testName The local name of this test case, not including the
 *     test suite name.
 * @param {function(lib.TestManager.Result, Object)} testFunction The function
 *     to invoke for this test case.  This is passed a Result instance and the
 *     context object associated with the test run.
 *
 */
lib.TestManager.Test = function(suiteClass, testName, testFunction) {
  /**
   * The test suite class containing this function.
   */
  this.suiteClass = suiteClass;

  /**
   * The local name of this test, not including the test suite name.
   */
  this.testName = testName;

  /**
   * The global name of this test, including the test suite name.
   */
  this.fullName = suiteClass.suiteName + '[' + testName + ']';

  // The function to call for this test.
  this.testFunction_ = testFunction;
};

/**
 * Execute this test.
 *
 * This is called by a lib.TestManager.Result instance, as part of a
 * lib.TestManager.TestRun.  You should not call it by hand.
 *
 * @param {lib.TestManager.Result} result The result object for the test.
 */
lib.TestManager.Test.prototype.run = function(result) {
  try {
    // Tests are applied to the parent lib.TestManager.Suite subclass.
    this.testFunction_.apply(result.suite,
                             [result, result.testRun.cx]);
  } catch (ex) {
    if (ex instanceof lib.TestManager.Result.TestComplete)
      return;

    result.println('Test raised an exception: ' + ex);

    if (ex.stack) {
      if (ex.stack instanceof Array) {
        result.println(ex.stack.join('\n'));
      } else {
        result.println(ex.stack);
      }
    }

    result.completeTest_(result.FAILED, false);
  }
};

/**
 * Used to choose a set of tests and run them.
 *
 * It's slightly more convenient to construct one of these from
 * lib.TestManager.prototype.createTestRun().
 *
 * @param {lib.TestManager} testManager The testManager associated with this
 *     TestRun.
 * @param {Object} cx A context to be passed into the tests.  This can be used
 *     to set parameters for the test suite or individual test cases.
 */
lib.TestManager.TestRun = function(testManager, cx) {
  /**
   * The associated lib.TestManager instance.
   */
  this.testManager = testManager;

  /**
   * Shortcut to the lib.TestManager's log.
   */
  this.log = testManager.log;

  /**
   * The test run context.  It's entirely up to the test suite and test cases
   * how this is used.  It is opaque to lib.TestManager.* classes.
   */
  this.cx = cx || {};

  /**
   * The list of test cases that encountered failures.
   */
  this.failures = [];

  /**
   * The list of test cases that passed.
   */
  this.passes = [];

  /**
   * The time the test run started, or null if it hasn't been started yet.
   */
  this.startDate = null;

  /**
   * The time in milliseconds that the test run took to complete, or null if
   * it hasn't completed yet.
   */
  this.duration = null;

  /**
   * The most recent result object, or null if the test run hasn't started
   * yet.  In order to detect late failures, this is not cleared when the test
   * completes.
   */
  this.currentResult = null;

  /**
   * Number of maximum failures.  The test run will stop when this number is
   * reached.  If 0 or omitted, the entire set of selected tests is run, even
   * if some fail.
   */
  this.maxFailures = 0;

  /**
   * True if this test run ended early because of an unexpected condition.
   */
  this.panic = false;

  // List of pending test cases.
  this.testQueue_ = [];

};

/**
 * This value can be passed to select() to indicate that all tests should
 * be selected.
 */
lib.TestManager.TestRun.prototype.ALL_TESTS = new String('<all-tests>');

/**
 * Add a single test to the test run.
 */
lib.TestManager.TestRun.prototype.selectTest = function(test) {
  this.testQueue_.push(test);
};

lib.TestManager.TestRun.prototype.selectSuite = function(
    suiteClass, opt_pattern) {
  var pattern = opt_pattern || this.ALL_TESTS;
  var selectCount = 0;
  var testList = suiteClass.getTestList();

  for (var j = 0; j < testList.length; j++) {
    var test = testList[j];
    // Note that we're using "!==" rather than "!=" so that we're matching
    // the ALL_TESTS String object, rather than the contents of the string.
    if (pattern !== this.ALL_TESTS) {
      if (pattern instanceof RegExp) {
        if (!pattern.test(test.testName))
          continue;
      } else if (test.testName != pattern) {
        continue;
      }
    }

    this.selectTest(test);
    selectCount++;
  }

  return selectCount;
};

/**
 * Selects one or more tests to gather results for.
 *
 * Selecting the same test more than once is allowed.
 *
 * @param {string|RegExp} pattern Pattern used to select tests.
 *     If TestRun.prototype.ALL_TESTS, all tests are selected.
 *     If a string, only the test that exactly matches is selected.
 *     If a RegExp, only tests matching the RegExp are added.
 *
 * @return {int} The number of additional tests that have been selected into
 *     this TestRun.
 */
lib.TestManager.TestRun.prototype.selectPattern = function(pattern) {
  var selectCount = 0;

  for (var i = 0; i < lib.TestManager.Suite.subclasses.length; i++) {
    selectCount += this.selectSuite(lib.TestManager.Suite.subclasses[i],
                                    pattern);
  }

  if (!selectCount) {
    this.log.println('No tests matched selection criteria: ' + pattern);
  }

  return selectCount;
};

/**
 * Hooked up to window.onerror during a test run in order to catch exceptions
 * that would otherwise go uncaught.
 */
lib.TestManager.TestRun.prototype.onUncaughtException_ = function(
    message, file, line) {

  if (message.indexOf('Uncaught lib.TestManager.Result.TestComplete') == 0 ||
      message.indexOf('status: passed') != -1) {
    // This is a result.pass() or result.fail() call from a callback.  We're
    // already going to deal with it as part of the completeTest_() call
    // that raised it.  We can safely squelch this error message.
    return true;
  }

  if (!this.currentResult)
    return;

  if (message == 'Uncaught ' + this.currentResult.expectedErrorMessage_) {
    // Test cases may need to raise an unhandled exception as part of the test.
    return;
  }

  var when = 'during';

  if (this.currentResult.status != this.currentResult.PENDING)
    when = 'after';

  this.log.println('Uncaught exception ' + when + ' test case: ' +
                   this.currentResult.test.fullName);
  this.log.println(message + ', ' + file + ':' + line);

  this.currentResult.completeTest_(this.currentResult.FAILED, false);

  return false;
};

/**
 * Called to when this test run has completed.
 *
 * This method typically re-runs itself asynchronously, in order to let the
 * DOM stabilize and short-term timeouts to complete before declaring the
 * test run complete.
 *
 * @param {boolean} opt_skipTimeout If true, the timeout is skipped and the
 *     test run is completed immediately.  This should only be used from within
 *     this function.
 */
lib.TestManager.TestRun.prototype.onTestRunComplete_ = function(
    opt_skipTimeout) {
  if (!opt_skipTimeout) {
    // The final test may have left a lingering setTimeout(..., 0), or maybe
    // poked at the DOM in a way that will trigger a event to fire at the end
    // of this stack, so we give things a chance to settle down before our
    // final cleanup...
    setTimeout(this.onTestRunComplete_.bind(this), 0, true);
    return;
  }

  this.duration = (new Date()) - this.startDate;

  this.log.popPrefix();
  this.log.println('} ' + this.passes.length + ' passed, ' +
                   this.failures.length + ' failed, '  +
                   this.msToSeconds_(this.duration));
  this.log.println('');

  this.summarize();

  window.onerror = null;

  this.testManager.onTestRunComplete(this);
};

/**
 * Called by the lib.TestManager.Result object when a test completes.
 *
 * @param {lib.TestManager.Result} result The result object which has just
 *     completed.
 */
lib.TestManager.TestRun.prototype.onResultComplete = function(result) {
  try {
    this.testManager.testPostamble(result, this.cx);
    result.suite.postamble(result, this.ctx);
  } catch (ex) {
    this.log.println('Unexpected exception in postamble: ' +
                     (ex.stack ? ex.stack : ex));
    this.panic = true;
  }

  this.log.popPrefix();
  this.log.print('} ' + result.status + ', ' +
                 this.msToSeconds_(result.duration));
  this.log.flush();

  if (result.status == result.FAILED) {
    this.failures.push(result);
    this.currentSuite = null;
  } else if (result.status == result.PASSED) {
    this.passes.push(result);
  } else {
    this.log.println('Unknown result status: ' + result.test.fullName + ': ' +
                     result.status);
    return this.panic = true;
  }

  this.runNextTest_();
};

/**
 * Called by the lib.TestManager.Result object when a test which has already
 * completed reports another completion.
 *
 * This is usually indicative of a buggy testcase.  It is probably reporting a
 * result on exit and then again from an asynchronous callback.
 *
 * It may also be the case that the last act of the testcase causes a DOM change
 * which triggers some event to run after the test returns.  If the event
 * handler reports a failure or raises an uncaught exception, the test will
 * fail even though it has already completed.
 *
 * In any case, re-completing a test ALWAYS moves it into the failure pile.
 *
 * @param {lib.TestManager.Result} result The result object which has just
 *     completed.
 * @param {string} lateStatus The status that the test attempted to record this
 *     time around.
 */
lib.TestManager.TestRun.prototype.onResultReComplete = function(
    result, lateStatus) {
  this.log.println('Late complete for test: ' + result.test.fullName + ': ' +
                   lateStatus);

  // Consider any late completion a failure, even if it's a double-pass, since
  // it's a misuse of the testing API.
  var index = this.passes.indexOf(result);
  if (index >= 0) {
    this.passes.splice(index, 1);
    this.failures.push(result);
  }
};

/**
 * Run the next test in the queue.
 */
lib.TestManager.TestRun.prototype.runNextTest_ = function() {
  if (this.panic || !this.testQueue_.length)
    return this.onTestRunComplete_();

  if (this.maxFailures && this.failures.length >= this.maxFailures) {
    this.log.println('Maximum failure count reached, aborting test run.');
    return this.onTestRunComplete_();
  }

  // Peek at the top test first.  We remove it later just before it's about
  // to run, so that we don't disturb the incomplete test count in the
  // event that we fail before running it.
  var test = this.testQueue_[0];
  var suite = this.currentResult ? this.currentResult.suite : null;

  try {
    if (!suite || !(suite instanceof test.suiteClass)) {
      this.log.println('Initializing suite: ' + test.suiteClass.suiteName);
      suite = new test.suiteClass(this.testManager, this.cx);
    }
  } catch (ex) {
    // If test suite setup fails we're not even going to try to run the tests.
    this.log.println('Exception during setup: ' + (ex.stack ? ex.stack : ex));
    this.panic = true;
    this.onTestRunComplete_();
    return;
  }

  try {
    this.log.print('Test: ' + test.fullName + ' {');
    this.log.pushPrefix('  ');

    this.currentResult = new lib.TestManager.Result(this, suite, test);
    this.testManager.testPreamble(this.currentResult, this.cx);
    suite.preamble(this.currentResult, this.cx);

    this.testQueue_.shift();
  } catch (ex) {
    this.log.println('Unexpected exception during test preamble: ' +
                     (ex.stack ? ex.stack : ex));
    this.log.popPrefix();
    this.log.println('}');

    this.panic = true;
    this.onTestRunComplete_();
    return;
  }

  try {
    this.currentResult.run();
  } catch (ex) {
    // Result.run() should catch test exceptions and turn them into failures.
    // If we got here, it means there is trouble in the testing framework.
    this.log.println('Unexpected exception during test run: ' +
                     (ex.stack ? ex.stack : ex));
    this.panic = true;
  }
};

/**
 * Run the selected list of tests.
 *
 * Some tests may need to run asynchronously, so you cannot assume the run is
 * complete when this function returns.  Instead, pass in a function to be
 * called back when the run has completed.
 *
 * This function will log the results of the test run as they happen into the
 * log defined by the associated lib.TestManager.  By default this is
 * console.log, which can be viewed in the JavaScript console of most browsers.
 *
 * The browser state is determined by the last test to run.  We intentionally
 * don't do any cleanup so that you can inspect the state of a failed test, or
 * leave the browser ready for manual testing.
 *
 * Any failures in lib.TestManager.* code or test suite setup or test case
 * preamble will cause the test run to abort.
 */
lib.TestManager.TestRun.prototype.run = function() {
  this.log.println('Running ' + this.testQueue_.length + ' test(s) {');
  this.log.pushPrefix('  ');

  window.onerror = this.onUncaughtException_.bind(this);
  this.startDate = new Date();
  this.runNextTest_();
};

/**
 * Format milliseconds as fractional seconds.
 */
lib.TestManager.TestRun.prototype.msToSeconds_ = function(ms) {
  var secs = (ms / 1000).toFixed(2);
  return secs + 's';
};

/**
 * Log the current result summary.
 */
lib.TestManager.TestRun.prototype.summarize = function() {
  if (this.failures.length) {
    for (var i = 0; i < this.failures.length; i++) {
      this.log.println('FAILED: ' + this.failures[i].test.fullName);
    }
  }

  if (this.testQueue_.length) {
    this.log.println('Test run incomplete: ' + this.testQueue_.length +
                     ' test(s) were not run.');
  }
};

/**
 * Record of the result of a single test.
 *
 * These are constructed during a test run, you shouldn't have to make one
 * on your own.
 *
 * An instance of this class is passed in to each test function.  It can be
 * used to add messages to the test log, to record a test pass/fail state, to
 * test assertions, or to create exception-proof wrappers for callback
 * functions.
 *
 * @param {lib.TestManager.TestRun} testRun The TestRun instance associated with
 *     this result.
 * @param {lib.TestManager.Suit} suite The Suite containing the test we're
 *     collecting this result for.
 * @param {lib.TestManager.Test} test The test we're collecting this result for.
 */
lib.TestManager.Result = function(testRun, suite, test) {
  /**
   * The TestRun instance associated with this result.
   */
  this.testRun = testRun;

  /**
   * The Suite containing the test we're collecting this result for.
   */
  this.suite = suite;

  /**
   * The test we're collecting this result for.
   */
  this.test = test;

  /**
   * The time we started to collect this result, or null if we haven't started.
   */
  this.startDate = null;

  /**
   * The time in milliseconds that the test took to complete, or null if
   * it hasn't completed yet.
   */
  this.duration = null;

  /**
   * The current status of this test result.
   */
  this.status = this.PENDING;

  // An error message that the test case is expected to generate.
  this.expectedErrorMessage_ = null;
};

/**
 * Possible values for this.status.
 */
lib.TestManager.Result.prototype.PENDING = 'pending';
lib.TestManager.Result.prototype.FAILED  = 'FAILED';
lib.TestManager.Result.prototype.PASSED  = 'passed';

/**
 * Exception thrown when a test completes (pass or fail), to ensure no more of
 * the test is run.
 */
lib.TestManager.Result.TestComplete = function(result) {
  this.result = result;
};

lib.TestManager.Result.TestComplete.prototype.toString = function() {
  return 'lib.TestManager.Result.TestComplete: ' + this.result.test.fullName +
      ', status: ' + this.result.status;
}

/**
 * Start the test associated with this result.
 */
lib.TestManager.Result.prototype.run = function() {
  var self = this;

  this.startDate = new Date();
  this.test.run(this);

  if (this.status == this.PENDING && !this.timeout_) {
    this.println('Test did not return a value and did not request more time.');
    this.completeTest_(this.FAILED, false);
  }
};

/**
 * Unhandled error message this test expects to generate.
 *
 * This must be the exact string that would appear in the JavaScript console,
 * minus the 'Uncaught ' prefix.
 *
 * The test case does *not* automatically fail if the error message is not
 * encountered.
 */
lib.TestManager.Result.prototype.expectErrorMessage = function(str) {
  this.expectedErrorMessage_ = str;
};

/**
 * Function called when a test times out.
 */
lib.TestManager.Result.prototype.onTimeout_ = function() {
  this.timeout_ = null;

  if (this.status != this.PENDING)
    return;

  this.println('Test timed out.');
  this.completeTest_(this.FAILED, false);
};

/**
 * Indicate that a test case needs more time to complete.
 *
 * Before a test case returns it must report a pass/fail result, or request more
 * time to do so.
 *
 * If a test does not report pass/fail before the time expires it will
 * be reported as a timeout failure.  Any late pass/fails will be noted in the
 * test log, but will not affect the final result of the test.
 *
 * Test cases may call requestTime more than once.  If you have a few layers
 * of asynchronous API to go through, you should call this once per layer with
 * an estimate of how long each callback will take to complete.
 *
 * @param {int} ms Number of milliseconds requested.
 */
lib.TestManager.Result.prototype.requestTime = function(ms) {
  if (this.timeout_)
    clearTimeout(this.timeout_);

  this.timeout_ = setTimeout(this.onTimeout_.bind(this), ms);
};

/**
 * Report the completion of a test.
 *
 * @param {string} status The status of the test case.
 * @param {boolean} opt_throw Optional boolean indicating whether or not
 *     to throw the TestComplete exception.
 */
lib.TestManager.Result.prototype.completeTest_ = function(status, opt_throw) {
  if (this.status == this.PENDING) {
    this.duration = (new Date()) - this.startDate;
    this.status = status;

    this.testRun.onResultComplete(this);
  } else {
    this.testRun.onResultReComplete(this, status);
  }

  if (arguments.length < 2 || opt_throw)
    throw new lib.TestManager.Result.TestComplete(this);
};

/**
 * Check that two arrays are equal.
 */
lib.TestManager.Result.prototype.arrayEQ_ = function(actual, expected) {
  if (!actual || !expected)
    return (!actual && !expected);

  if (actual.length != expected.length)
    return false;

  for (var i = 0; i < actual.length; ++i)
    if (actual[i] != expected[i])
      return false;

  return true;
};

/**
 * Assert that an actual value is exactly equal to the expected value.
 *
 * This uses the JavaScript '===' operator in order to avoid type coercion.
 *
 * If the assertion fails, the test is marked as a failure and a TestCompleted
 * exception is thrown.
 *
 * @param {*} actual The actual measured value.
 * @param {*} expected The value expected.
 * @param {string} opt_name An optional name used to identify this
 *     assertion in the test log.  If omitted it will be the file:line
 *     of the caller.
 */
lib.TestManager.Result.prototype.assertEQ = function(
    actual, expected, opt_name) {
  // Utility function to pretty up the log.
  function format(value) {
    if (typeof value == 'number')
      return value;

    var str = String(value);
    var ary = str.split('\n').map(function (e) { return JSON.stringify(e) });
    if (ary.length > 1) {
      // If the string has newlines, start it off on its own line so that
      // it's easier to compare against another string with newlines.
      return '\n' + ary.join('\n');
    } else {
      return ary.join('\n');
    }
  }

  if (actual === expected)
    return;

  // Deal with common object types since JavaScript can't.
  if (expected instanceof Array)
    if (this.arrayEQ_(actual, expected))
      return;

  var name = opt_name ? '[' + opt_name + ']' : '';

  this.fail('assertEQ' + name + ': ' + this.getCallerLocation_(1) + ': ' +
            format(actual) + ' !== ' + format(expected));
};

/**
 * Assert that a value is true.
 *
 * This uses the JavaScript '===' operator in order to avoid type coercion.
 * The must be the boolean value `true`, not just some "truish" value.
 *
 * If the assertion fails, the test is marked as a failure and a TestCompleted
 * exception is thrown.
 *
 * @param {boolean} actual The actual measured value.
 * @param {string} opt_name An optional name used to identify this
 *     assertion in the test log.  If omitted it will be the file:line
 *     of the caller.
 */
lib.TestManager.Result.prototype.assert = function(actual, opt_name) {
  if (actual === true)
    return;

  var name = opt_name ? '[' + opt_name + ']' : '';

  this.fail('assert' + name + ': ' + this.getCallerLocation_(1) + ': ' +
            String(actual));
};

/**
 * Return the filename:line of a calling stack frame.
 *
 * This uses a dirty hack.  It throws an exception, catches it, and examines
 * the stack property of the caught exception.
 *
 * @param {int} frameIndex The stack frame to return.  0 is the frame that
 *     called this method, 1 is its caller, and so on.
 * @return {string} A string of the format "filename:linenumber".
 */
lib.TestManager.Result.prototype.getCallerLocation_ = function(frameIndex) {
  try {
    throw new Error();
  } catch (ex) {
    var frame = ex.stack.split('\n')[frameIndex + 2];
    var ary = frame.match(/([^/]+:\d+):\d+\)?$/);
    return ary ? ary[1] : '???';
  }
};

/**
 * Write a message to the result log.
 */
lib.TestManager.Result.prototype.println = function(message) {
  this.testRun.log.println(message);
};

/**
 * Mark a failed test and exit out of the rest of the test.
 *
 * This will throw a TestCompleted exception, causing the current test to stop.
 *
 * @param {string} opt_message Optional message to add to the log.
 */
lib.TestManager.Result.prototype.fail = function(opt_message) {
  if (arguments.length)
    this.println(opt_message);

  this.completeTest_(this.FAILED, true);
};

/**
 * Mark a passed test and exit out of the rest of the test.
 *
 * This will throw a TestCompleted exception, causing the current test to stop.
 */
lib.TestManager.Result.prototype.pass = function() {
  this.completeTest_(this.PASSED, true);
};
// SOURCE FILE: libdot/js/lib_utf8.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

// TODO(davidben): When the string encoding API is implemented,
// replace this with the native in-browser implementation.
//
// https://wiki.whatwg.org/wiki/StringEncoding
// https://encoding.spec.whatwg.org/

/**
 * A stateful UTF-8 decoder.
 */
lib.UTF8Decoder = function() {
  // The number of bytes left in the current sequence.
  this.bytesLeft = 0;
  // The in-progress code point being decoded, if bytesLeft > 0.
  this.codePoint = 0;
  // The lower bound on the final code point, if bytesLeft > 0.
  this.lowerBound = 0;
};

/**
 * Decodes a some UTF-8 data, taking into account state from previous
 * data streamed through the encoder.
 *
 * @param {String} str data to decode, represented as a JavaScript
 *     String with each code unit representing a byte between 0x00 to
 *     0xFF.
 * @return {String} The data decoded into a JavaScript UTF-16 string.
 */
lib.UTF8Decoder.prototype.decode = function(str) {
  var ret = '';
  for (var i = 0; i < str.length; i++) {
    var c = str.charCodeAt(i);
    if (this.bytesLeft == 0) {
      if (c <= 0x7F) {
        ret += str.charAt(i);
      } else if (0xC0 <= c && c <= 0xDF) {
        this.codePoint = c - 0xC0;
        this.bytesLeft = 1;
        this.lowerBound = 0x80;
      } else if (0xE0 <= c && c <= 0xEF) {
        this.codePoint = c - 0xE0;
        this.bytesLeft = 2;
        this.lowerBound = 0x800;
      } else if (0xF0 <= c && c <= 0xF7) {
        this.codePoint = c - 0xF0;
        this.bytesLeft = 3;
        this.lowerBound = 0x10000;
      } else if (0xF8 <= c && c <= 0xFB) {
        this.codePoint = c - 0xF8;
        this.bytesLeft = 4;
        this.lowerBound = 0x200000;
      } else if (0xFC <= c && c <= 0xFD) {
        this.codePoint = c - 0xFC;
        this.bytesLeft = 5;
        this.lowerBound = 0x4000000;
      } else {
        ret += '\ufffd';
      }
    } else {
      if (0x80 <= c && c <= 0xBF) {
        this.bytesLeft--;
        this.codePoint = (this.codePoint << 6) + (c - 0x80);
        if (this.bytesLeft == 0) {
          // Got a full sequence. Check if it's within bounds and
          // filter out surrogate pairs.
          var codePoint = this.codePoint;
          if (codePoint < this.lowerBound
              || (0xD800 <= codePoint && codePoint <= 0xDFFF)
              || codePoint > 0x10FFFF) {
            ret += '\ufffd';
          } else {
            // Encode as UTF-16 in the output.
            if (codePoint < 0x10000) {
              ret += String.fromCharCode(codePoint);
            } else {
              // Surrogate pair.
              codePoint -= 0x10000;
              ret += String.fromCharCode(
                0xD800 + ((codePoint >>> 10) & 0x3FF),
                0xDC00 + (codePoint & 0x3FF));
            }
          }
        }
      } else {
        // Too few bytes in multi-byte sequence. Rewind stream so we
        // don't lose the next byte.
        ret += '\ufffd';
        this.bytesLeft = 0;
        i--;
      }
    }
  }
  return ret;
};

/**
 * Decodes UTF-8 data. This is a convenience function for when all the
 * data is already known.
 *
 * @param {String} str data to decode, represented as a JavaScript
 *     String with each code unit representing a byte between 0x00 to
 *     0xFF.
 * @return {String} The data decoded into a JavaScript UTF-16 string.
 */
lib.decodeUTF8 = function(utf8) {
  return (new lib.UTF8Decoder()).decode(utf8);
};

/**
 * Encodes a UTF-16 string into UTF-8.
 *
 * TODO(davidben): Do we need a stateful version of this that can
 * handle a surrogate pair split in two calls? What happens if a
 * keypress event would have contained a character outside the BMP?
 *
 * @param {String} str The string to encode.
 * @return {String} The string encoded as UTF-8, as a JavaScript
 *     string with bytes represented as code units from 0x00 to 0xFF.
 */
lib.encodeUTF8 = function(str) {
  var ret = '';
  for (var i = 0; i < str.length; i++) {
    // Get a unicode code point out of str.
    var c = str.charCodeAt(i);
    if (0xDC00 <= c && c <= 0xDFFF) {
      c = 0xFFFD;
    } else if (0xD800 <= c && c <= 0xDBFF) {
      if (i+1 < str.length) {
        var d = str.charCodeAt(i+1);
        if (0xDC00 <= d && d <= 0xDFFF) {
          // Swallow a surrogate pair.
          c = 0x10000 + ((c & 0x3FF) << 10) + (d & 0x3FF);
          i++;
        } else {
          c = 0xFFFD;
        }
      } else {
        c = 0xFFFD;
      }
    }

    // Encode c in UTF-8.
    var bytesLeft;
    if (c <= 0x7F) {
      ret += str.charAt(i);
      continue;
    } else if (c <= 0x7FF) {
      ret += String.fromCharCode(0xC0 | (c >>> 6));
      bytesLeft = 1;
    } else if (c <= 0xFFFF) {
      ret += String.fromCharCode(0xE0 | (c >>> 12));
      bytesLeft = 2;
    } else /* if (c <= 0x10FFFF) */ {
      ret += String.fromCharCode(0xF0 | (c >>> 18));
      bytesLeft = 3;
    }

    while (bytesLeft > 0) {
      bytesLeft--;
      ret += String.fromCharCode(0x80 | ((c >>> (6 * bytesLeft)) & 0x3F));
    }
  }
  return ret;
};
// SOURCE FILE: libdot/js/lib_wc.js
// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
// Use of lib.wc source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * This JavaScript library is ported from the wcwidth.js module of node.js.
 * The original implementation can be found at:
 * https://npmjs.org/package/wcwidth.js
 */

/**
 * JavaScript porting of Markus Kuhn's wcwidth() implementation
 *
 * The following explanation comes from the original C implementation:
 *
 * This is an implementation of wcwidth() and wcswidth() (defined in
 * IEEE Std 1002.1-2001) for Unicode.
 *
 * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
 * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
 *
 * In fixed-width output devices, Latin characters all occupy a single
 * "cell" position of equal width, whereas ideographic CJK characters
 * occupy two such cells. Interoperability between terminal-line
 * applications and (teletype-style) character terminals using the
 * UTF-8 encoding requires agreement on which character should advance
 * the cursor by how many cell positions. No established formal
 * standards exist at present on which Unicode character shall occupy
 * how many cell positions on character terminals. These routines are
 * a first attempt of defining such behavior based on simple rules
 * applied to data provided by the Unicode Consortium.
 *
 * For some graphical characters, the Unicode standard explicitly
 * defines a character-cell width via the definition of the East Asian
 * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
 * In all these cases, there is no ambiguity about which width a
 * terminal shall use. For characters in the East Asian Ambiguous (A)
 * class, the width choice depends purely on a preference of backward
 * compatibility with either historic CJK or Western practice.
 * Choosing single-width for these characters is easy to justify as
 * the appropriate long-term solution, as the CJK practice of
 * displaying these characters as double-width comes from historic
 * implementation simplicity (8-bit encoded characters were displayed
 * single-width and 16-bit ones double-width, even for Greek,
 * Cyrillic, etc.) and not any typographic considerations.
 *
 * Much less clear is the choice of width for the Not East Asian
 * (Neutral) class. Existing practice does not dictate a width for any
 * of these characters. It would nevertheless make sense
 * typographically to allocate two character cells to characters such
 * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
 * represented adequately with a single-width glyph. The following
 * routines at present merely assign a single-cell width to all
 * neutral characters, in the interest of simplicity. This is not
 * entirely satisfactory and should be reconsidered before
 * establishing a formal standard in lib.wc area. At the moment, the
 * decision which Not East Asian (Neutral) characters should be
 * represented by double-width glyphs cannot yet be answered by
 * applying a simple rule from the Unicode database content. Setting
 * up a proper standard for the behavior of UTF-8 character terminals
 * will require a careful analysis not only of each Unicode character,
 * but also of each presentation form, something the author of these
 * routines has avoided to do so far.
 *
 * http://www.unicode.org/unicode/reports/tr11/
 *
 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
 *
 * Permission to use, copy, modify, and distribute lib.wc software
 * for any purpose and without fee is hereby granted. The author
 * disclaims all warranties with regard to lib.wc software.
 *
 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
 */

/**
 * The following function defines the column width of an ISO 10646 character
 * as follows:
 *
 *  - The null character (U+0000) has a column width of 0.
 *  - Other C0/C1 control characters and DEL will lead to a return value of -1.
 *  - Non-spacing and enclosing combining characters (general category code Mn
 *    or Me in the Unicode database) have a column width of 0.
 *  - SOFT HYPHEN (U+00AD) has a column width of 1.
 *  - Other format characters (general category code Cf in the Unicode database)
 *    and ZERO WIDTH SPACE (U+200B) have a column width of 0.
 *  - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) have a
 *    column width of 0.
 *  - Spacing characters in the East Asian Wide (W) or East Asian Full-width (F)
 *    category as defined in Unicode Technical Report #11 have a column width of
 *    2.
 *  - East Asian Ambiguous characters are taken into account if
 *    regardCjkAmbiguous flag is enabled. They have a column width of 2.
 *  - All remaining characters (including all printable ISO 8859-1 and WGL4
 *    characters, Unicode control characters, etc.) have a column width of 1.
 *
 * This implementation assumes that characters are encoded in ISO 10646.
 */

/**
 * This library relies on the use of codePointAt, which is not supported in
 * all browsers. Polyfill if not.  See
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt#Polyfill
 */
if (!String.prototype.codePointAt) {
  (function() {
    'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
    var codePointAt = function(position) {
      if (this == null) {
        throw TypeError();
      }
      var string = String(this);
      var size = string.length;
      // `ToInteger`
      var index = position ? Number(position) : 0;
      if (index != index) { // better `isNaN`
        index = 0;
      }
      // Account for out-of-bounds indices:
      if (index < 0 || index >= size) {
        return undefined;
      }
      // Get the first code unit
      var first = string.charCodeAt(index);
      var second;
      if ( // check if it’s the start of a surrogate pair
        first >= 0xD800 && first <= 0xDBFF && // high surrogate
        size > index + 1 // there is a next code unit
      ) {
        second = string.charCodeAt(index + 1);
        if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
          // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
          return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
        }
      }
      return first;
    };
    if (Object.defineProperty) {
      Object.defineProperty(String.prototype, 'codePointAt', {
        'value': codePointAt,
        'configurable': true,
        'writable': true
      });
    } else {
      String.prototype.codePointAt = codePointAt;
    }
  }());
}

lib.wc = {};

// Width of a nul character.
lib.wc.nulWidth = 0;

// Width of a control character.
lib.wc.controlWidth = 0;

// Flag whether to consider East Asian Ambiguous characters.
lib.wc.regardCjkAmbiguous = false;

// Width of an East Asian Ambiguous character.
lib.wc.cjkAmbiguousWidth = 2;

// Sorted list of non-overlapping intervals of non-spacing characters
// generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c"
lib.wc.combining = [
    [ 0x0300, 0x036F ], [ 0x0483, 0x0486 ], [ 0x0488, 0x0489 ],
    [ 0x0591, 0x05BD ], [ 0x05BF, 0x05BF ], [ 0x05C1, 0x05C2 ],
    [ 0x05C4, 0x05C5 ], [ 0x05C7, 0x05C7 ], [ 0x0600, 0x0603 ],
    [ 0x0610, 0x0615 ], [ 0x064B, 0x065E ], [ 0x0670, 0x0670 ],
    [ 0x06D6, 0x06E4 ], [ 0x06E7, 0x06E8 ], [ 0x06EA, 0x06ED ],
    [ 0x070F, 0x070F ], [ 0x0711, 0x0711 ], [ 0x0730, 0x074A ],
    [ 0x07A6, 0x07B0 ], [ 0x07EB, 0x07F3 ], [ 0x0901, 0x0902 ],
    [ 0x093C, 0x093C ], [ 0x0941, 0x0948 ], [ 0x094D, 0x094D ],
    [ 0x0951, 0x0954 ], [ 0x0962, 0x0963 ], [ 0x0981, 0x0981 ],
    [ 0x09BC, 0x09BC ], [ 0x09C1, 0x09C4 ], [ 0x09CD, 0x09CD ],
    [ 0x09E2, 0x09E3 ], [ 0x0A01, 0x0A02 ], [ 0x0A3C, 0x0A3C ],
    [ 0x0A41, 0x0A42 ], [ 0x0A47, 0x0A48 ], [ 0x0A4B, 0x0A4D ],
    [ 0x0A70, 0x0A71 ], [ 0x0A81, 0x0A82 ], [ 0x0ABC, 0x0ABC ],
    [ 0x0AC1, 0x0AC5 ], [ 0x0AC7, 0x0AC8 ], [ 0x0ACD, 0x0ACD ],
    [ 0x0AE2, 0x0AE3 ], [ 0x0B01, 0x0B01 ], [ 0x0B3C, 0x0B3C ],
    [ 0x0B3F, 0x0B3F ], [ 0x0B41, 0x0B43 ], [ 0x0B4D, 0x0B4D ],
    [ 0x0B56, 0x0B56 ], [ 0x0B82, 0x0B82 ], [ 0x0BC0, 0x0BC0 ],
    [ 0x0BCD, 0x0BCD ], [ 0x0C3E, 0x0C40 ], [ 0x0C46, 0x0C48 ],
    [ 0x0C4A, 0x0C4D ], [ 0x0C55, 0x0C56 ], [ 0x0CBC, 0x0CBC ],
    [ 0x0CBF, 0x0CBF ], [ 0x0CC6, 0x0CC6 ], [ 0x0CCC, 0x0CCD ],
    [ 0x0CE2, 0x0CE3 ], [ 0x0D41, 0x0D43 ], [ 0x0D4D, 0x0D4D ],
    [ 0x0DCA, 0x0DCA ], [ 0x0DD2, 0x0DD4 ], [ 0x0DD6, 0x0DD6 ],
    [ 0x0E31, 0x0E31 ], [ 0x0E34, 0x0E3A ], [ 0x0E47, 0x0E4E ],
    [ 0x0EB1, 0x0EB1 ], [ 0x0EB4, 0x0EB9 ], [ 0x0EBB, 0x0EBC ],
    [ 0x0EC8, 0x0ECD ], [ 0x0F18, 0x0F19 ], [ 0x0F35, 0x0F35 ],
    [ 0x0F37, 0x0F37 ], [ 0x0F39, 0x0F39 ], [ 0x0F71, 0x0F7E ],
    [ 0x0F80, 0x0F84 ], [ 0x0F86, 0x0F87 ], [ 0x0F90, 0x0F97 ],
    [ 0x0F99, 0x0FBC ], [ 0x0FC6, 0x0FC6 ], [ 0x102D, 0x1030 ],
    [ 0x1032, 0x1032 ], [ 0x1036, 0x1037 ], [ 0x1039, 0x1039 ],
    [ 0x1058, 0x1059 ], [ 0x1160, 0x11FF ], [ 0x135F, 0x135F ],
    [ 0x1712, 0x1714 ], [ 0x1732, 0x1734 ], [ 0x1752, 0x1753 ],
    [ 0x1772, 0x1773 ], [ 0x17B4, 0x17B5 ], [ 0x17B7, 0x17BD ],
    [ 0x17C6, 0x17C6 ], [ 0x17C9, 0x17D3 ], [ 0x17DD, 0x17DD ],
    [ 0x180B, 0x180D ], [ 0x18A9, 0x18A9 ], [ 0x1920, 0x1922 ],
    [ 0x1927, 0x1928 ], [ 0x1932, 0x1932 ], [ 0x1939, 0x193B ],
    [ 0x1A17, 0x1A18 ], [ 0x1B00, 0x1B03 ], [ 0x1B34, 0x1B34 ],
    [ 0x1B36, 0x1B3A ], [ 0x1B3C, 0x1B3C ], [ 0x1B42, 0x1B42 ],
    [ 0x1B6B, 0x1B73 ], [ 0x1DC0, 0x1DCA ], [ 0x1DFE, 0x1DFF ],
    [ 0x200B, 0x200F ], [ 0x202A, 0x202E ], [ 0x2060, 0x2063 ],
    [ 0x206A, 0x206F ], [ 0x20D0, 0x20EF ], [ 0x302A, 0x302F ],
    [ 0x3099, 0x309A ], [ 0xA806, 0xA806 ], [ 0xA80B, 0xA80B ],
    [ 0xA825, 0xA826 ], [ 0xFB1E, 0xFB1E ], [ 0xFE00, 0xFE0F ],
    [ 0xFE20, 0xFE23 ], [ 0xFEFF, 0xFEFF ], [ 0xFFF9, 0xFFFB ],
    [ 0x10A01, 0x10A03 ], [ 0x10A05, 0x10A06 ], [ 0x10A0C, 0x10A0F ],
    [ 0x10A38, 0x10A3A ], [ 0x10A3F, 0x10A3F ], [ 0x1D167, 0x1D169 ],
    [ 0x1D173, 0x1D182 ], [ 0x1D185, 0x1D18B ], [ 0x1D1AA, 0x1D1AD ],
    [ 0x1D242, 0x1D244 ], [ 0xE0001, 0xE0001 ], [ 0xE0020, 0xE007F ],
    [ 0xE0100, 0xE01EF ]
];

// Sorted list of non-overlapping intervals of East Asian Ambiguous characters
// generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c"
lib.wc.ambiguous = [
    [ 0x00A1, 0x00A1 ], [ 0x00A4, 0x00A4 ], [ 0x00A7, 0x00A8 ],
    [ 0x00AA, 0x00AA ], [ 0x00AE, 0x00AE ], [ 0x00B0, 0x00B4 ],
    [ 0x00B6, 0x00BA ], [ 0x00BC, 0x00BF ], [ 0x00C6, 0x00C6 ],
    [ 0x00D0, 0x00D0 ], [ 0x00D7, 0x00D8 ], [ 0x00DE, 0x00E1 ],
    [ 0x00E6, 0x00E6 ], [ 0x00E8, 0x00EA ], [ 0x00EC, 0x00ED ],
    [ 0x00F0, 0x00F0 ], [ 0x00F2, 0x00F3 ], [ 0x00F7, 0x00FA ],
    [ 0x00FC, 0x00FC ], [ 0x00FE, 0x00FE ], [ 0x0101, 0x0101 ],
    [ 0x0111, 0x0111 ], [ 0x0113, 0x0113 ], [ 0x011B, 0x011B ],
    [ 0x0126, 0x0127 ], [ 0x012B, 0x012B ], [ 0x0131, 0x0133 ],
    [ 0x0138, 0x0138 ], [ 0x013F, 0x0142 ], [ 0x0144, 0x0144 ],
    [ 0x0148, 0x014B ], [ 0x014D, 0x014D ], [ 0x0152, 0x0153 ],
    [ 0x0166, 0x0167 ], [ 0x016B, 0x016B ], [ 0x01CE, 0x01CE ],
    [ 0x01D0, 0x01D0 ], [ 0x01D2, 0x01D2 ], [ 0x01D4, 0x01D4 ],
    [ 0x01D6, 0x01D6 ], [ 0x01D8, 0x01D8 ], [ 0x01DA, 0x01DA ],
    [ 0x01DC, 0x01DC ], [ 0x0251, 0x0251 ], [ 0x0261, 0x0261 ],
    [ 0x02C4, 0x02C4 ], [ 0x02C7, 0x02C7 ], [ 0x02C9, 0x02CB ],
    [ 0x02CD, 0x02CD ], [ 0x02D0, 0x02D0 ], [ 0x02D8, 0x02DB ],
    [ 0x02DD, 0x02DD ], [ 0x02DF, 0x02DF ], [ 0x0391, 0x03A1 ],
    [ 0x03A3, 0x03A9 ], [ 0x03B1, 0x03C1 ], [ 0x03C3, 0x03C9 ],
    [ 0x0401, 0x0401 ], [ 0x0410, 0x044F ], [ 0x0451, 0x0451 ],
    [ 0x2010, 0x2010 ], [ 0x2013, 0x2016 ], [ 0x2018, 0x2019 ],
    [ 0x201C, 0x201D ], [ 0x2020, 0x2022 ], [ 0x2024, 0x2027 ],
    [ 0x2030, 0x2030 ], [ 0x2032, 0x2033 ], [ 0x2035, 0x2035 ],
    [ 0x203B, 0x203B ], [ 0x203E, 0x203E ], [ 0x2074, 0x2074 ],
    [ 0x207F, 0x207F ], [ 0x2081, 0x2084 ], [ 0x20AC, 0x20AC ],
    [ 0x2103, 0x2103 ], [ 0x2105, 0x2105 ], [ 0x2109, 0x2109 ],
    [ 0x2113, 0x2113 ], [ 0x2116, 0x2116 ], [ 0x2121, 0x2122 ],
    [ 0x2126, 0x2126 ], [ 0x212B, 0x212B ], [ 0x2153, 0x2154 ],
    [ 0x215B, 0x215E ], [ 0x2160, 0x216B ], [ 0x2170, 0x2179 ],
    [ 0x2190, 0x2199 ], [ 0x21B8, 0x21B9 ], [ 0x21D2, 0x21D2 ],
    [ 0x21D4, 0x21D4 ], [ 0x21E7, 0x21E7 ], [ 0x2200, 0x2200 ],
    [ 0x2202, 0x2203 ], [ 0x2207, 0x2208 ], [ 0x220B, 0x220B ],
    [ 0x220F, 0x220F ], [ 0x2211, 0x2211 ], [ 0x2215, 0x2215 ],
    [ 0x221A, 0x221A ], [ 0x221D, 0x2220 ], [ 0x2223, 0x2223 ],
    [ 0x2225, 0x2225 ], [ 0x2227, 0x222C ], [ 0x222E, 0x222E ],
    [ 0x2234, 0x2237 ], [ 0x223C, 0x223D ], [ 0x2248, 0x2248 ],
    [ 0x224C, 0x224C ], [ 0x2252, 0x2252 ], [ 0x2260, 0x2261 ],
    [ 0x2264, 0x2267 ], [ 0x226A, 0x226B ], [ 0x226E, 0x226F ],
    [ 0x2282, 0x2283 ], [ 0x2286, 0x2287 ], [ 0x2295, 0x2295 ],
    [ 0x2299, 0x2299 ], [ 0x22A5, 0x22A5 ], [ 0x22BF, 0x22BF ],
    [ 0x2312, 0x2312 ], [ 0x2460, 0x24E9 ], [ 0x24EB, 0x254B ],
    [ 0x2550, 0x2573 ], [ 0x2580, 0x258F ], [ 0x2592, 0x2595 ],
    [ 0x25A0, 0x25A1 ], [ 0x25A3, 0x25A9 ], [ 0x25B2, 0x25B3 ],
    [ 0x25B6, 0x25B7 ], [ 0x25BC, 0x25BD ], [ 0x25C0, 0x25C1 ],
    [ 0x25C6, 0x25C8 ], [ 0x25CB, 0x25CB ], [ 0x25CE, 0x25D1 ],
    [ 0x25E2, 0x25E5 ], [ 0x25EF, 0x25EF ], [ 0x2605, 0x2606 ],
    [ 0x2609, 0x2609 ], [ 0x260E, 0x260F ], [ 0x2614, 0x2615 ],
    [ 0x261C, 0x261C ], [ 0x261E, 0x261E ], [ 0x2640, 0x2640 ],
    [ 0x2642, 0x2642 ], [ 0x2660, 0x2661 ], [ 0x2663, 0x2665 ],
    [ 0x2667, 0x266A ], [ 0x266C, 0x266D ], [ 0x266F, 0x266F ],
    [ 0x273D, 0x273D ], [ 0x2776, 0x277F ], [ 0xE000, 0xF8FF ],
    [ 0xFFFD, 0xFFFD ], [ 0xF0000, 0xFFFFD ], [ 0x100000, 0x10FFFD ]
];

/**
 * Binary search to check if the given unicode character is a space character.
 *
 * @param {integer} ucs A unicode character code.
 *
 * @return {boolean} True if the given character is a space character; false
 *     otherwise.
 */
lib.wc.isSpace = function(ucs) {
  // Auxiliary function for binary search in interval table.
  var min = 0, max = lib.wc.combining.length - 1;
  var mid;

  if (ucs < lib.wc.combining[0][0] || ucs > lib.wc.combining[max][1])
    return false;
  while (max >= min) {
    mid = Math.floor((min + max) / 2);
    if (ucs > lib.wc.combining[mid][1]) {
      min = mid + 1;
    } else if (ucs < lib.wc.combining[mid][0]) {
      max = mid - 1;
    } else {
      return true;
    }
  }

  return false;
};

/**
 * Auxiliary function for checking if the given unicode character is a East
 * Asian Ambiguous character.
 *
 * @param {integer} ucs A unicode character code.
 *
 * @return {boolean} True if the given character is a East Asian Ambiguous
 * character.
 */
lib.wc.isCjkAmbiguous = function(ucs) {
  var min = 0, max = lib.wc.ambiguous.length - 1;
  var mid;

  if (ucs < lib.wc.ambiguous[0][0] || ucs > lib.wc.ambiguous[max][1])
    return false;
  while (max >= min) {
    mid = Math.floor((min + max) / 2);
    if (ucs > lib.wc.ambiguous[mid][1]) {
      min = mid + 1;
    } else if (ucs < lib.wc.ambiguous[mid][0]) {
      max = mid - 1;
    } else {
      return true;
    }
  }

  return false;
};

/**
 * Determine the column width of the given character.
 *
 * @param {integer} ucs A unicode character code.
 *
 * @return {integer} The column width of the given character.
 */
lib.wc.charWidth = function(ucs) {
  if (lib.wc.regardCjkAmbiguous) {
    return lib.wc.charWidthRegardAmbiguous(ucs);
  } else {
    return lib.wc.charWidthDisregardAmbiguous(ucs);
  }
};

/**
 * Determine the column width of the given character without considering East
 * Asian Ambiguous characters.
 *
 * @param {integer} ucs A unicode character code.
 *
 * @return {integer} The column width of the given character.
 */
lib.wc.charWidthDisregardAmbiguous = function(ucs) {
  // Test for 8-bit control characters.
  if (ucs === 0)
    return lib.wc.nulWidth;
  if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
    return lib.wc.controlWidth;

  // Optimize for ASCII characters.
  if (ucs < 0x7f)
    return 1;

  // Binary search in table of non-spacing characters.
  if (lib.wc.isSpace(ucs))
    return 0;

  // If we arrive here, ucs is not a combining or C0/C1 control character.
  return 1 +
    (ucs >= 0x1100 &&
     (ucs <= 0x115f ||             // Hangul Jamo init. consonants
      ucs == 0x2329 || ucs == 0x232a ||
      (ucs >= 0x2e80 && ucs <= 0xa4cf &&
       ucs != 0x303f) ||           // CJK ... Yi
      (ucs >= 0xac00 && ucs <= 0xd7a3) ||  // Hangul Syllables
      (ucs >= 0xf900 && ucs <= 0xfaff) ||  // CJK Compatibility Ideographs
      (ucs >= 0xfe10 && ucs <= 0xfe19) ||  // Vertical forms
      (ucs >= 0xfe30 && ucs <= 0xfe6f) ||  // CJK Compatibility Forms
      (ucs >= 0xff00 && ucs <= 0xff60) ||  // Fullwidth Forms
      (ucs >= 0xffe0 && ucs <= 0xffe6) ||
      (ucs >= 0x20000 && ucs <= 0x2fffd) ||
      (ucs >= 0x30000 && ucs <= 0x3fffd)));
  // TODO: emoji characters usually require space for wide characters although
  // East Asian width spec says nothing. Should we add special cases for them?
};

/**
 * Determine the column width of the given character considering East Asian
 * Ambiguous characters.
 *
 * @param {integer} ucs A unicode character code.
 *
 * @return {integer} The column width of the given character.
 */
lib.wc.charWidthRegardAmbiguous = function(ucs) {
  if (lib.wc.isCjkAmbiguous(ucs))
    return lib.wc.cjkAmbiguousWidth;

  return lib.wc.charWidthDisregardAmbiguous(ucs);
};

/**
 * Determine the column width of the given string.
 *
 * @param {string} str A string.
 *
 * @return {integer} The column width of the given string.
 */
lib.wc.strWidth = function(str) {
  var width, rv = 0;

  for (var i = 0; i < str.length;) {
    var codePoint = str.codePointAt(i);
    width = lib.wc.charWidth(codePoint);
    if (width < 0)
      return -1;
    rv += width;
    i += (codePoint <= 0xffff) ? 1 : 2;
  }

  return rv;
};

/**
 * Get the substring at the given column offset of the given column width.
 *
 * @param {string} str The string to get substring from.
 * @param {integer} start The starting column offset to get substring.
 * @param {integer} opt_width The column width of the substring.
 *
 * @return {string} The substring.
 */
lib.wc.substr = function(str, start, opt_width) {
  var startIndex, endIndex, width;

  for (startIndex = 0, width = 0; startIndex < str.length; startIndex++) {
    width += lib.wc.charWidth(str.charCodeAt(startIndex));
    if (width > start)
      break;
  }

  if (opt_width != undefined) {
    for (endIndex = startIndex, width = 0;
         endIndex < str.length && width < opt_width;
         width += lib.wc.charWidth(str.charCodeAt(endIndex)), endIndex++);
    if (width > opt_width)
      endIndex--;
    return str.substring(startIndex, endIndex);
  }

  return str.substr(startIndex);
};

/**
 * Get substring at the given start and end column offset.
 *
 * @param {string} str The string to get substring from.
 * @param {integer} start The starting column offset.
 * @param {integer} end The ending column offset.
 *
 * @return {string} The substring.
 */
lib.wc.substring = function(str, start, end) {
  return lib.wc.substr(str, start, end - start);
};
lib.resource.add('libdot/changelog/version', 'text/plain',
'1.11' +
''
);

lib.resource.add('libdot/changelog/date', 'text/plain',
'2017-04-17' +
''
);

// SOURCE FILE: hterm/js/hterm.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.Storage');

/**
 * @fileoverview Declares the hterm.* namespace and some basic shared utilities
 * that are too small to deserve dedicated files.
 */
var hterm = {};

/**
 * The type of window hosting hterm.
 *
 * This is set as part of hterm.init().  The value is invalid until
 * initialization completes.
 */
hterm.windowType = null;

/**
 * Warning message to display in the terminal when browser zoom is enabled.
 *
 * You can replace it with your own localized message.
 */
hterm.zoomWarningMessage = 'ZOOM != 100%';

/**
 * Brief overlay message displayed when text is copied to the clipboard.
 *
 * By default it is the unicode BLACK SCISSORS character, but you can
 * replace it with your own localized message.
 *
 * This is only displayed when the 'enable-clipboard-notice' preference
 * is enabled.
 */
hterm.notifyCopyMessage = '\u2702';


/**
 * Text shown in a desktop notification for the terminal
 * bell.  \u226a is a unicode EIGHTH NOTE, %(title) will
 * be replaced by the terminal title.
 */
hterm.desktopNotificationTitle = '\u266A %(title) \u266A';

/**
 * List of known hterm test suites.
 *
 * A test harness should ensure that they all exist before running.
 */
hterm.testDeps = ['hterm.ScrollPort.Tests', 'hterm.Screen.Tests',
                  'hterm.Terminal.Tests', 'hterm.VT.Tests',
                  'hterm.VT.CannedTests'];

/**
 * The hterm init function, registered with lib.registerInit().
 *
 * This is called during lib.init().
 *
 * @param {function} onInit The function lib.init() wants us to invoke when
 *     initialization is complete.
 */
lib.registerInit('hterm', function(onInit) {
  function onWindow(window) {
    hterm.windowType = window.type;
    setTimeout(onInit, 0);
  }

  function onTab(tab) {
    if (tab && window.chrome) {
      chrome.windows.get(tab.windowId, null, onWindow);
    } else {
      // TODO(rginda): This is where we end up for a v1 app's background page.
      // Maybe windowType = 'none' would be more appropriate, or something.
      hterm.windowType = 'normal';
      setTimeout(onInit, 0);
    }
  }

  if (!hterm.defaultStorage) {
    var ary = navigator.userAgent.match(/\sChrome\/(\d\d)/);
    var version = ary ? parseInt(ary[1]) : -1;
    if (window.chrome && chrome.storage && chrome.storage.sync &&
        version > 21) {
      hterm.defaultStorage = new lib.Storage.Chrome(chrome.storage.sync);
    } else {
      hterm.defaultStorage = new lib.Storage.Local();
    }
  }

  // The chrome.tabs API is not supported in packaged apps, and detecting if
  // you're a packaged app is a little awkward.
  var isPackagedApp = false;
  if (window.chrome && chrome.runtime && chrome.runtime.getManifest) {
    var manifest = chrome.runtime.getManifest();
    isPackagedApp = manifest.app && manifest.app.background;
  }

  if (isPackagedApp) {
    // Packaged apps are never displayed in browser tabs.
    setTimeout(onWindow.bind(null, {type: 'popup'}), 0);
  } else {
    if (window.chrome && chrome.tabs) {
      // The getCurrent method gets the tab that is "currently running", not the
      // topmost or focused tab.
      chrome.tabs.getCurrent(onTab);
    } else {
      setTimeout(onWindow.bind(null, {type: 'normal'}), 0);
    }
  }
});

/**
 * Return decimal { width, height } for a given dom node.
 */
hterm.getClientSize = function(dom) {
  return dom.getBoundingClientRect();
};

/**
 * Return decimal width for a given dom node.
 */
hterm.getClientWidth = function(dom) {
  return dom.getBoundingClientRect().width;
};

/**
 * Return decimal height for a given dom node.
 */
hterm.getClientHeight = function(dom) {
  return dom.getBoundingClientRect().height;
};

/**
 * Copy the current selection to the system clipboard.
 *
 * @param {HTMLDocument} The document with the selection to copy.
 */
hterm.copySelectionToClipboard = function(document) {
  try {
    document.execCommand('copy');
  } catch (firefoxException) {
    // Ignore this. FF throws an exception if there was an error, even though
    // the spec says just return false.
  }
};

/**
 * Paste the system clipboard into the element with focus.
 *
 * @param {HTMLDocument} The document to paste into.
 */
hterm.pasteFromClipboard = function(document) {
  try {
    document.execCommand('paste');
  } catch (firefoxException) {
    // Ignore this. FF throws an exception if there was an error, even though
    // the spec says just return false.
  }
};

/**
 * Constructor for a hterm.Size record.
 *
 * Instances of this class have public read/write members for width and height.
 *
 * @param {integer} width The width of this record.
 * @param {integer} height The height of this record.
 */
hterm.Size = function(width, height) {
  this.width = width;
  this.height = height;
};

/**
 * Adjust the width and height of this record.
 *
 * @param {integer} width The new width of this record.
 * @param {integer} height The new height of this record.
 */
hterm.Size.prototype.resize = function(width, height) {
  this.width = width;
  this.height = height;
};

/**
 * Return a copy of this record.
 *
 * @return {hterm.Size} A new hterm.Size instance with the same width and
 * height.
 */
hterm.Size.prototype.clone = function() {
  return new hterm.Size(this.width, this.height);
};

/**
 * Set the height and width of this instance based on another hterm.Size.
 *
 * @param {hterm.Size} that The object to copy from.
 */
hterm.Size.prototype.setTo = function(that) {
  this.width = that.width;
  this.height = that.height;
};

/**
 * Test if another hterm.Size instance is equal to this one.
 *
 * @param {hterm.Size} that The other hterm.Size instance.
 * @return {boolean} True if both instances have the same width/height, false
 *     otherwise.
 */
hterm.Size.prototype.equals = function(that) {
  return this.width == that.width && this.height == that.height;
};

/**
 * Return a string representation of this instance.
 *
 * @return {string} A string that identifies the width and height of this
 *     instance.
 */
hterm.Size.prototype.toString = function() {
  return '[hterm.Size: ' + this.width + ', ' + this.height + ']';
};

/**
 * Constructor for a hterm.RowCol record.
 *
 * Instances of this class have public read/write members for row and column.
 *
 * This class includes an 'overflow' bit which is use to indicate that an
 * attempt has been made to move the cursor column passed the end of the
 * screen.  When this happens we leave the cursor column set to the last column
 * of the screen but set the overflow bit.  In this state cursor movement
 * happens normally, but any attempt to print new characters causes a cr/lf
 * first.
 *
 * @param {integer} row The row of this record.
 * @param {integer} column The column of this record.
 * @param {boolean} opt_overflow Optional boolean indicating that the RowCol
 *     has overflowed.
 */
hterm.RowCol = function(row, column, opt_overflow) {
  this.row = row;
  this.column = column;
  this.overflow = !!opt_overflow;
};

/**
 * Adjust the row and column of this record.
 *
 * @param {integer} row The new row of this record.
 * @param {integer} column The new column of this record.
 * @param {boolean} opt_overflow Optional boolean indicating that the RowCol
 *     has overflowed.
 */
hterm.RowCol.prototype.move = function(row, column, opt_overflow) {
  this.row = row;
  this.column = column;
  this.overflow = !!opt_overflow;
};

/**
 * Return a copy of this record.
 *
 * @return {hterm.RowCol} A new hterm.RowCol instance with the same row and
 * column.
 */
hterm.RowCol.prototype.clone = function() {
  return new hterm.RowCol(this.row, this.column, this.overflow);
};

/**
 * Set the row and column of this instance based on another hterm.RowCol.
 *
 * @param {hterm.RowCol} that The object to copy from.
 */
hterm.RowCol.prototype.setTo = function(that) {
  this.row = that.row;
  this.column = that.column;
  this.overflow = that.overflow;
};

/**
 * Test if another hterm.RowCol instance is equal to this one.
 *
 * @param {hterm.RowCol} that The other hterm.RowCol instance.
 * @return {boolean} True if both instances have the same row/column, false
 *     otherwise.
 */
hterm.RowCol.prototype.equals = function(that) {
  return (this.row == that.row && this.column == that.column &&
          this.overflow == that.overflow);
};

/**
 * Return a string representation of this instance.
 *
 * @return {string} A string that identifies the row and column of this
 *     instance.
 */
hterm.RowCol.prototype.toString = function() {
  return ('[hterm.RowCol: ' + this.row + ', ' + this.column + ', ' +
          this.overflow + ']');
};
// SOURCE FILE: hterm/js/hterm_frame.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.f');

/**
 * First draft of the interface between the terminal and a third party dialog.
 *
 * This is rough.  It's just the terminal->dialog layer.  To complete things
 * we'll also need a command->terminal layer.  That will have to facilitate
 * command->terminal->dialog or direct command->dialog communication.
 *
 * I imagine this class will change significantly when that happens.
 */

/**
 * Construct a new frame for the given terminal.
 *
 * @param terminal {hterm.Terminal} The parent terminal object.
 * @param url {String} The url to load in the frame.
 * @param opt_options {Object} Optional options for the frame.  Not implemented.
 */
hterm.Frame = function(terminal, url, opt_options) {
  this.terminal_ = terminal;
  this.div_ = terminal.div_;
  this.url = url;
  this.options = opt_options || {};
  this.iframe_ = null;
  this.container_ = null;
  this.messageChannel_ = null;
};

/**
 * Handle messages from the iframe.
 */
hterm.Frame.prototype.onMessage_ = function(e) {
  if (e.data.name != 'ipc-init-ok') {
    console.log('Unknown message from frame:', e.data);
    return;
  }

  this.sendTerminalInfo_();
  this.messageChannel_.port1.onmessage = this.onMessage.bind(this);
  this.onLoad();
};

/**
 * Clients could override this, I guess.
 *
 * It doesn't support multiple listeners, but I'm not sure that would make sense
 * here.  It's probably better to speak directly to our parents.
 */
hterm.Frame.prototype.onMessage = function() {};

/**
 * Handle iframe onLoad event.
 */
hterm.Frame.prototype.onLoad_ = function() {
  this.messageChannel_ = new MessageChannel();
  this.messageChannel_.port1.onmessage = this.onMessage_.bind(this);
  this.messageChannel_.port1.start();
  this.iframe_.contentWindow.postMessage(
      {name: 'ipc-init', argv: [{messagePort: this.messageChannel_.port2}]},
      this.url, [this.messageChannel_.port2]);
};

/**
 * Clients may override this.
 */
hterm.Frame.prototype.onLoad = function() {};

/**
 * Sends the terminal-info message to the iframe.
 */
hterm.Frame.prototype.sendTerminalInfo_ = function() {
  lib.f.getAcceptLanguages(function(languages) {
      this.postMessage('terminal-info', [{
         acceptLanguages: languages,
         foregroundColor: this.terminal_.getForegroundColor(),
         backgroundColor: this.terminal_.getBackgroundColor(),
         cursorColor: this.terminal_.getCursorColor(),
         fontSize: this.terminal_.getFontSize(),
         fontFamily: this.terminal_.getFontFamily(),
         baseURL: lib.f.getURL('/')
          }]
        );
    }.bind(this));
};

/**
 * User clicked the close button on the frame decoration.
 */
hterm.Frame.prototype.onCloseClicked_ = function() {
  this.close();
};

/**
 * Close this frame.
 */
hterm.Frame.prototype.close = function() {
  if (!this.container_ || !this.container_.parentNode)
      return;

  this.container_.parentNode.removeChild(this.container_);
  this.onClose();
};


/**
 * Clients may override this.
 */
hterm.Frame.prototype.onClose = function() {};

/**
 * Send a message to the iframe.
 */
hterm.Frame.prototype.postMessage = function(name, argv) {
  if (!this.messageChannel_)
    throw new Error('Message channel is not set up.');

  this.messageChannel_.port1.postMessage({name: name, argv: argv});
};

/**
 * Show the UI for this frame.
 *
 * The iframe src is not loaded until this method is called.
 */
hterm.Frame.prototype.show = function() {
  var self = this;

  function opt(name, defaultValue) {
    if (name in self.options)
      return self.options[name];

    return defaultValue;
  }

  var self = this;

  if (this.container_ && this.container_.parentNode) {
    console.error('Frame already visible');
    return;
  }

  var headerHeight = '16px';

  var divSize = hterm.getClientSize(this.div_);

  var width = opt('width', 640);
  var height = opt('height', 480);
  var left = (divSize.width - width) / 2;
  var top = (divSize.height - height) / 2;

  var document = this.terminal_.document_;

  var container = this.container_ = document.createElement('div');
  container.style.cssText = (
      'position: absolute;' +
      'display: -webkit-flex;' +
      '-webkit-flex-direction: column;' +
      'top: 10%;' +
      'left: 4%;' +
      'width: 90%;' +
      'height: 80%;' +
      'box-shadow: 0 0 2px ' + this.terminal_.getForegroundColor() + ';' +
      'border: 2px ' + this.terminal_.getForegroundColor() + ' solid;');

  var header = document.createElement('div');
  header.style.cssText = (
      'display: -webkit-flex;' +
      '-webkit-justify-content: flex-end;' +
      'height: ' + headerHeight + ';' +
      'background-color: ' + this.terminal_.getForegroundColor() + ';' +
      'color: ' + this.terminal_.getBackgroundColor() + ';' +
      'font-size: 16px;' +
      'font-family: ' + this.terminal_.getFontFamily());
  container.appendChild(header);

  if (false) {
    // No use for the close button.
    var button = document.createElement('div');
    button.setAttribute('role', 'button');
    button.style.cssText = (
        'margin-top: -3px;' +
        'margin-right: 3px;' +
        'cursor: pointer;');
    button.textContent = '\u2a2f';
    button.addEventListener('click', this.onCloseClicked_.bind(this));
    header.appendChild(button);
  }

  var iframe = this.iframe_ = document.createElement('iframe');
  iframe.onload = this.onLoad_.bind(this);
  iframe.style.cssText = (
      'display: -webkit-flex;' +
      '-webkit-flex: 1;' +
      'width: 100%');
  iframe.setAttribute('src', this.url);
  iframe.setAttribute('seamless', true);
  container.appendChild(iframe);

  this.div_.appendChild(container);
};
// SOURCE FILE: hterm/js/hterm_keyboard.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('hterm.Keyboard.KeyMap');

/**
 * Keyboard handler.
 *
 * Consumes onKey* events and invokes onVTKeystroke on the associated
 * hterm.Terminal object.
 *
 * See also: [XTERM] as referenced in vt.js.
 *
 * @param {hterm.Terminal} The Terminal object associated with this keyboard.
 */
hterm.Keyboard = function(terminal) {
  // The parent vt interpreter.
  this.terminal = terminal;

  // The element we're currently capturing keyboard events for.
  this.keyboardElement_ = null;

  // The event handlers we are interested in, and their bound callbacks, saved
  // so they can be uninstalled with removeEventListener, when required.
  this.handlers_ = [
      ['focusout', this.onFocusOut_.bind(this)],
      ['keydown', this.onKeyDown_.bind(this)],
      ['keypress', this.onKeyPress_.bind(this)],
      ['keyup', this.onKeyUp_.bind(this)],
      ['textInput', this.onTextInput_.bind(this)]
  ];

  /**
   * The current key map.
   */
  this.keyMap = new hterm.Keyboard.KeyMap(this);

  this.bindings = new hterm.Keyboard.Bindings(this);

  /**
   * none: Disable any AltGr related munging.
   * ctrl-alt: Assume Ctrl+Alt means AltGr.
   * left-alt: Assume left Alt means AltGr.
   * right-alt: Assume right Alt means AltGr.
   */
  this.altGrMode = 'none';

  /**
   * If true, Shift-Insert will fall through to the browser as a paste.
   * If false, the keystroke will be sent to the host.
   */
  this.shiftInsertPaste = true;

  /**
   * If true, home/end will control the terminal scrollbar and shift home/end
   * will send the VT keycodes.  If false then home/end sends VT codes and
   * shift home/end scrolls.
   */
  this.homeKeysScroll = false;

  /**
   * Same as above, except for page up/page down.
   */
  this.pageKeysScroll = false;

  /**
   * If true, Ctrl-Plus/Minus/Zero controls zoom.
   * If false, Ctrl-Shift-Plus/Minus/Zero controls zoom, Ctrl-Minus sends ^_,
   * Ctrl-Plus/Zero do nothing.
   */
  this.ctrlPlusMinusZeroZoom = true;

  /**
   * Ctrl+C copies if true, sends ^C to host if false.
   * Ctrl+Shift+C sends ^C to host if true, copies if false.
   */
  this.ctrlCCopy = false;

  /**
   * Ctrl+V pastes if true, sends ^V to host if false.
   * Ctrl+Shift+V sends ^V to host if true, pastes if false.
   */
  this.ctrlVPaste = false;

  /**
   * Enable/disable application keypad.
   *
   * This changes the way numeric keys are sent from the keyboard.
   */
  this.applicationKeypad = false;

  /**
   * Enable/disable the application cursor mode.
   *
   * This changes the way cursor keys are sent from the keyboard.
   */
  this.applicationCursor = false;

  /**
   * If true, the backspace should send BS ('\x08', aka ^H).  Otherwise
   * the backspace key should send '\x7f'.
   */
  this.backspaceSendsBackspace = false;

  /**
   * The encoding method for data sent to the host.
   */
  this.characterEncoding = 'utf-8';

  /**
   * Set whether the meta key sends a leading escape or not.
   */
  this.metaSendsEscape = true;

  /**
   * Set whether meta-V gets passed to host.
   */
  this.passMetaV = true;

  /**
   * Controls how the alt key is handled.
   *
   *  escape....... Send an ESC prefix.
   *  8-bit........ Add 128 to the unshifted character as in xterm.
   *  browser-key.. Wait for the keypress event and see what the browser says.
   *                (This won't work well on platforms where the browser
   *                 performs a default action for some alt sequences.)
   *
   * This setting only matters when alt is distinct from meta (altIsMeta is
   * false.)
   */
  this.altSendsWhat = 'escape';

  /**
   * Set whether the alt key acts as a meta key, instead of producing 8-bit
   * characters.
   *
   * True to enable, false to disable, null to autodetect based on platform.
   */
  this.altIsMeta = false;

  /**
   * If true, tries to detect DEL key events that are from alt-backspace on
   * Chrome OS vs from a true DEL key press.
   *
   * Background: At the time of writing, on Chrome OS, alt-backspace is mapped
   * to DEL. Some users may be happy with this, but others may be frustrated
   * that it's impossible to do meta-backspace. If the user enables this pref,
   * we use a trick to tell a true DEL keypress from alt-backspace: on
   * alt-backspace, we will see the alt key go down, then get a DEL keystroke
   * that indicates that alt is not pressed. See https://crbug.com/174410 .
   */
  this.altBackspaceIsMetaBackspace = false;

  /**
   * Used to keep track of the current alt-key state, which is necessary for
   * the altBackspaceIsMetaBackspace preference above and for the altGrMode
   * preference.  This is a bitmap with where bit positions correspond to the
   * "location" property of the key event.
   */
  this.altKeyPressed = 0;

  /**
   * If true, Chrome OS media keys will be mapped to their F-key equivalent.
   * E.g. "Back" will be mapped to F1. If false, Chrome will handle the keys.
   */
  this.mediaKeysAreFKeys = false;

  /**
   * Holds the previous setting of altSendsWhat when DECSET 1039 is used. When
   * DECRST 1039 is used, altSendsWhat is changed back to this and this is
   * nulled out.
   */
  this.previousAltSendsWhat_ = null;
};

/**
 * Special handling for keyCodes in a keyboard layout.
 */
hterm.Keyboard.KeyActions = {
  /**
   * Call preventDefault and stopPropagation for this key event and nothing
   * else.
   */
  CANCEL: new String('CANCEL'),

  /**
   * This performs the default terminal action for the key.  If used in the
   * 'normal' action and the the keystroke represents a printable key, the
   * character will be sent to the host.  If used in one of the modifier
   * actions, the terminal will perform the normal action after (possibly)
   * altering it.
   *
   *  - If the normal sequence starts with CSI, the sequence will be adjusted
   *    to include the modifier parameter as described in [XTERM] in the final
   *    table of the "PC-Style Function Keys" section.
   *
   *  - If the control key is down and the key represents a printable character,
   *    and the uppercase version of the unshifted keycap is between
   *    64 (ASCII '@') and 95 (ASCII '_'), then the uppercase version of the
   *    unshifted keycap minus 64 is sent.  This makes '^@' send '\x00' and
   *    '^_' send '\x1f'.  (Note that one higher that 0x1f is 0x20, which is
   *    the first printable ASCII value.)
   *
   *  - If the alt key is down and the key represents a printable character then
   *    the value of the character is shifted up by 128.
   *
   *  - If meta is down and configured to send an escape, '\x1b' will be sent
   *    before the normal action is performed.
   */
  DEFAULT: new String('DEFAULT'),

  /**
   * Causes the terminal to opt out of handling the key event, instead letting
   * the browser deal with it.
   */
  PASS: new String('PASS'),

  /**
   * Insert the first or second character of the keyCap, based on e.shiftKey.
   * The key will be handled in onKeyDown, and e.preventDefault() will be
   * called.
   *
   * It is useful for a modified key action, where it essentially strips the
   * modifier while preventing the browser from reacting to the key.
   */
  STRIP: new String('STRIP')
};

/**
 * Encode a string according to the 'send-encoding' preference.
 */
hterm.Keyboard.prototype.encode = function(str) {
  if (this.characterEncoding == 'utf-8')
    return this.terminal.vt.encodeUTF8(str);

  return str;
};

/**
 * Capture keyboard events sent to the associated element.
 *
 * This enables the keyboard.  Captured events are consumed by this class
 * and will not perform their default action or bubble to other elements.
 *
 * Passing a null element will uninstall the keyboard handlers.
 *
 * @param {HTMLElement} element The element whose events should be captured, or
 *     null to disable the keyboard.
 */
hterm.Keyboard.prototype.installKeyboard = function(element) {
  if (element == this.keyboardElement_)
    return;

  if (element && this.keyboardElement_)
    this.installKeyboard(null);

  for (var i = 0; i < this.handlers_.length; i++) {
    var handler = this.handlers_[i];
    if (element) {
      element.addEventListener(handler[0], handler[1]);
    } else {
      this.keyboardElement_.removeEventListener(handler[0], handler[1]);
    }
  }

  this.keyboardElement_ = element;
};

/**
 * Disable keyboard event capture.
 *
 * This will allow the browser to process key events normally.
 */
hterm.Keyboard.prototype.uninstallKeyboard = function() {
  this.installKeyboard(null);
};

/**
 * Handle onTextInput events.
 *
 * We're not actually supposed to get these, but we do on the Mac in the case
 * where a third party app sends synthetic keystrokes to Chrome.
 */
hterm.Keyboard.prototype.onTextInput_ = function(e) {
  if (!e.data)
    return;

  e.data.split('').forEach(this.terminal.onVTKeystroke.bind(this.terminal));
};

/**
 * Handle onKeyPress events.
 */
hterm.Keyboard.prototype.onKeyPress_ = function(e) {
  var code;

  var key = String.fromCharCode(e.which);
  var lowerKey = key.toLowerCase();
  if ((e.ctrlKey || e.metaKey) && (lowerKey == 'c' || lowerKey == 'v')) {
    // On FF the key press (not key down) event gets fired for copy/paste.
    // Let it fall through for the default browser behavior.
    return;
  }

  if (e.altKey && this.altSendsWhat == 'browser-key' && e.charCode == 0) {
    // If we got here because we were expecting the browser to handle an
    // alt sequence but it didn't do it, then we might be on an OS without
    // an enabled IME system.  In that case we fall back to xterm-like
    // behavior.
    //
    // This happens here only as a fallback.  Typically these platforms should
    // set altSendsWhat to either 'escape' or '8-bit'.
    var ch = String.fromCharCode(e.keyCode);
    if (!e.shiftKey)
      ch = ch.toLowerCase();
    code = ch.charCodeAt(0) + 128;

  } else if (e.charCode >= 32) {
    ch = e.charCode;
  }

  if (ch)
    this.terminal.onVTKeystroke(String.fromCharCode(ch));

  e.preventDefault();
  e.stopPropagation();
};

/**
 * Prevent default handling for non-ctrl-shifted event.
 *
 * When combined with Chrome permission 'app.window.fullscreen.overrideEsc',
 * and called for both key down and key up events,
 * the ESC key remains usable within fullscreen Chrome app windows.
 */
hterm.Keyboard.prototype.preventChromeAppNonCtrlShiftDefault_ = function(e) {
  if (!window.chrome || !window.chrome.app || !window.chrome.app.window)
    return;
  if (!e.ctrlKey || !e.shiftKey)
    e.preventDefault();
};

hterm.Keyboard.prototype.onFocusOut_ = function(e) {
  this.altKeyPressed = 0;
};

hterm.Keyboard.prototype.onKeyUp_ = function(e) {
  if (e.keyCode == 18)
    this.altKeyPressed = this.altKeyPressed & ~(1 << (e.location - 1));

  if (e.keyCode == 27)
    this.preventChromeAppNonCtrlShiftDefault_(e);
};

/**
 * Handle onKeyDown events.
 */
hterm.Keyboard.prototype.onKeyDown_ = function(e) {
  if (e.keyCode == 18)
    this.altKeyPressed = this.altKeyPressed | (1 << (e.location - 1));

  if (e.keyCode == 27)
    this.preventChromeAppNonCtrlShiftDefault_(e);

  var keyDef = this.keyMap.keyDefs[e.keyCode];
  if (!keyDef) {
    console.warn('No definition for keyCode: ' + e.keyCode);
    return;
  }

  // The type of action we're going to use.
  var resolvedActionType = null;

  var self = this;
  function getAction(name) {
    // Get the key action for the given action name.  If the action is a
    // function, dispatch it.  If the action defers to the normal action,
    // resolve that instead.

    resolvedActionType = name;

    var action = keyDef[name];
    if (typeof action == 'function')
      action = action.apply(self.keyMap, [e, keyDef]);

    if (action === DEFAULT && name != 'normal')
      action = getAction('normal');

    return action;
  }

  // Note that we use the triple-equals ('===') operator to test equality for
  // these constants, in order to distinguish usage of the constant from usage
  // of a literal string that happens to contain the same bytes.
  var CANCEL = hterm.Keyboard.KeyActions.CANCEL;
  var DEFAULT = hterm.Keyboard.KeyActions.DEFAULT;
  var PASS = hterm.Keyboard.KeyActions.PASS;
  var STRIP = hterm.Keyboard.KeyActions.STRIP;

  var control = e.ctrlKey;
  var alt = this.altIsMeta ? false : e.altKey;
  var meta = this.altIsMeta ? (e.altKey || e.metaKey) : e.metaKey;

  // In the key-map, we surround the keyCap for non-printables in "[...]"
  var isPrintable = !(/^\[\w+\]$/.test(keyDef.keyCap));

  switch (this.altGrMode) {
    case 'ctrl-alt':
    if (isPrintable && control && alt) {
      // ctrl-alt-printable means altGr.  We clear out the control and
      // alt modifiers and wait to see the charCode in the keydown event.
      control = false;
      alt = false;
    }
    break;

    case 'right-alt':
    if (isPrintable && (this.terminal.keyboard.altKeyPressed & 2)) {
      control = false;
      alt = false;
    }
    break;

    case 'left-alt':
    if (isPrintable && (this.terminal.keyboard.altKeyPressed & 1)) {
      control = false;
      alt = false;
    }
    break;
  }

  var action;

  if (control) {
    action = getAction('control');
  } else if (alt) {
    action = getAction('alt');
  } else if (meta) {
    action = getAction('meta');
  } else {
    action = getAction('normal');
  }

  // If e.maskShiftKey was set (during getAction) it means the shift key is
  // already accounted for in the action, and we should not act on it any
  // further. This is currently only used for Ctrl-Shift-Tab, which should send
  // "CSI Z", not "CSI 1 ; 2 Z".
  var shift = !e.maskShiftKey && e.shiftKey;

  var keyDown = {
    keyCode: e.keyCode,
    shift: e.shiftKey, // not `var shift` from above.
    ctrl: control,
    alt: alt,
    meta: meta
  };

  var binding = this.bindings.getBinding(keyDown);

  if (binding) {
    // Clear out the modifier bits so we don't try to munge the sequence
    // further.
    shift = control = alt = meta = false;
    resolvedActionType = 'normal';
    action = binding.action;

    if (typeof action == 'function')
      action = action.call(this, this.terminal, keyDown);
  }

  if (alt && this.altSendsWhat == 'browser-key' && action == DEFAULT) {
    // When altSendsWhat is 'browser-key', we wait for the keypress event.
    // In keypress, the browser should have set the event.charCode to the
    // appropriate character.
    // TODO(rginda): Character compositions will need some black magic.
    action = PASS;
  }

  if (action === PASS || (action === DEFAULT && !(control || alt || meta))) {
    // If this key is supposed to be handled by the browser, or it is an
    // unmodified key with the default action, then exit this event handler.
    // If it's an unmodified key, it'll be handled in onKeyPress where we
    // can tell for sure which ASCII code to insert.
    //
    // This block needs to come before the STRIP test, otherwise we'll strip
    // the modifier and think it's ok to let the browser handle the keypress.
    // The browser won't know we're trying to ignore the modifiers and might
    // perform some default action.
    return;
  }

  if (action === STRIP) {
    alt = control = false;
    action = keyDef.normal;
    if (typeof action == 'function')
      action = action.apply(this.keyMap, [e, keyDef]);

    if (action == DEFAULT && keyDef.keyCap.length == 2)
      action = keyDef.keyCap.substr((shift ? 1 : 0), 1);
  }

  e.preventDefault();
  e.stopPropagation();

  if (action === CANCEL)
    return;

  if (action !== DEFAULT && typeof action != 'string') {
    console.warn('Invalid action: ' + JSON.stringify(action));
    return;
  }

  // Strip the modifier that is associated with the action, since we assume that
  // modifier has already been accounted for in the action.
  if (resolvedActionType == 'control') {
    control = false;
  } else if (resolvedActionType == 'alt') {
    alt = false;
  } else if (resolvedActionType == 'meta') {
    meta = false;
  }

  if (action.substr(0, 2) == '\x1b[' && (alt || control || shift)) {
    // The action is an escape sequence that and it was triggered in the
    // presence of a keyboard modifier, we may need to alter the action to
    // include the modifier before sending it.

    var mod;

    if (shift && !(alt || control)) {
      mod = ';2';
    } else if (alt && !(shift || control)) {
      mod = ';3';
    } else if (shift && alt && !control) {
      mod = ';4';
    } else if (control && !(shift || alt)) {
      mod = ';5';
    } else if (shift && control && !alt) {
      mod = ';6';
    } else if (alt && control && !shift) {
      mod = ';7';
    } else if (shift && alt && control) {
      mod = ';8';
    }

    if (action.length == 3) {
      // Some of the CSI sequences have zero parameters unless modified.
      action = '\x1b[1' + mod + action.substr(2, 1);
    } else {
      // Others always have at least one parameter.
      action = action.substr(0, action.length - 1) + mod +
          action.substr(action.length - 1);
    }

  } else {
    if (action === DEFAULT) {
      action = keyDef.keyCap.substr((shift ? 1 : 0), 1);

      if (control) {
        var unshifted = keyDef.keyCap.substr(0, 1);
        var code = unshifted.charCodeAt(0);
        if (code >= 64 && code <= 95) {
          action = String.fromCharCode(code - 64);
        }
      }
    }

    if (alt && this.altSendsWhat == '8-bit' && action.length == 1) {
      var code = action.charCodeAt(0) + 128;
      action = String.fromCharCode(code);
    }

    // We respect alt/metaSendsEscape even if the keymap action was a literal
    // string.  Otherwise, every overridden alt/meta action would have to
    // check alt/metaSendsEscape.
    if ((alt && this.altSendsWhat == 'escape') ||
        (meta && this.metaSendsEscape)) {
      action = '\x1b' + action;
    }
  }

  this.terminal.onVTKeystroke(action);
};
// SOURCE FILE: hterm/js/hterm_keyboard_bindings.js
// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * A mapping from hterm.Keyboard.KeyPattern to an action.
 *
 * TODO(rginda): For now this bindings code is only used for user overrides.
 * hterm.Keyboard.KeyMap still handles all of the built-in key mappings.
 * It'd be nice if we migrated that over to be hterm.Keyboard.Bindings based.
 */
hterm.Keyboard.Bindings = function() {
  this.bindings_ = {};
};

/**
 * Remove all bindings.
 */
hterm.Keyboard.Bindings.prototype.clear = function () {
  this.bindings_ = {};
};

/**
 * Add a new binding.
 *
 * Internal API that assumes parsed objects as inputs.
 * See the public addBinding for more details.
 *
 * @param {hterm.Keyboard.KeyPattern} keyPattern
 * @param {string|function|hterm.Keyboard.KeyAction} action
 */
hterm.Keyboard.Bindings.prototype.addBinding_ = function(keyPattern, action) {
  var binding = null;
  var list = this.bindings_[keyPattern.keyCode];
  if (list) {
    for (var i = 0; i < list.length; i++) {
      if (list[i].keyPattern.matchKeyPattern(keyPattern)) {
        binding = list[i];
        break;
      }
    }
  }

  if (binding) {
    binding.action = action;
  } else {
    binding = {keyPattern: keyPattern, action: action};

    if (!list) {
      this.bindings_[keyPattern.keyCode] = [binding];
    } else {
      this.bindings_[keyPattern.keyCode].push(binding);

      list.sort(function(a, b) {
        return hterm.Keyboard.KeyPattern.sortCompare(
            a.keyPattern, b.keyPattern);
      });
    }
  }
};

/**
 * Add a new binding.
 *
 * If a binding for the keyPattern already exists it will be overridden.
 *
 * More specific keyPatterns take precedence over those with wildcards.  Given
 * bindings for "Ctrl-A" and "Ctrl-*-A", and a "Ctrl-A" keydown, the "Ctrl-A"
 * binding will match even if "Ctrl-*-A" was created last.
 *
 * If action is a string, it will be passed through hterm.Parser.parseKeyAction.
 *
 * For example:
 *   // Will replace Ctrl-P keystrokes with the string "hiya!".
 *   addBinding('Ctrl-P', "'hiya!'");
 *   // Will cancel the keystroke entirely (make it do nothing).
 *   addBinding('Alt-D', hterm.Keyboard.KeyActions.CANCEL);
 *   // Will execute the code and return the action.
 *   addBinding('Ctrl-T', function() {
 *     console.log('Got a T!');
 *     return hterm.Keyboard.KeyActions.PASS;
 *   });
 *
 * @param {string|hterm.Keyboard.KeyPattern} keyPattern
 * @param {string|function|hterm.Keyboard.KeyAction} action
 */
hterm.Keyboard.Bindings.prototype.addBinding = function(key, action) {
  // If we're given a hterm.Keyboard.KeyPattern object, pass it down.
  if (typeof key != 'string') {
    this.addBinding_(key, action);
    return;
  }

  // Here we treat key as a string.
  var p = new hterm.Parser();

  p.reset(key);
  var sequence;

  try {
    sequence = p.parseKeySequence();
  } catch (ex) {
    console.error(ex);
    return;
  }

  if (!p.isComplete()) {
    console.error(p.error('Expected end of sequence: ' + sequence));
    return;
  }

  // If action is a string, parse it.  Otherwise assume it's callable.
  if (typeof action == 'string') {
    p.reset(action);
    try {
      action = p.parseKeyAction();
    } catch (ex) {
      console.error(ex);
      return;
    }
  }

  if (!p.isComplete()) {
    console.error(p.error('Expected end of sequence: ' + sequence));
    return;
  }

  this.addBinding_(new hterm.Keyboard.KeyPattern(sequence), action);
};

/**
 * Add multiple bindings at a time using a map of {string: string, ...}
 *
 * This uses hterm.Parser to parse the maps key into KeyPatterns, and the
 * map values into {string|function|KeyAction}.
 *
 * For example:
 *  {
 *    // Will replace Ctrl-P keystrokes with the string "hiya!".
 *    'Ctrl-P': "'hiya!'",
 *    // Will cancel the keystroke entirely (make it do nothing).
 *    'Alt-D': hterm.Keyboard.KeyActions.CANCEL,
 *  }
 *
 * @param {Object} map
 */
hterm.Keyboard.Bindings.prototype.addBindings = function(map) {
  for (var key in map) {
    this.addBinding(key, map[key]);
  }
};

/**
 * Return the binding that is the best match for the given keyDown record,
 * or null if there is no match.
 *
 * @param {Object} keyDown An object with a keyCode property and zero or
 *   more boolean properties representing key modifiers.  These property names
 *   must match those defined in hterm.Keyboard.KeyPattern.modifiers.
 */
hterm.Keyboard.Bindings.prototype.getBinding = function(keyDown) {
  var list = this.bindings_[keyDown.keyCode];
  if (!list)
    return null;

  for (var i = 0; i < list.length; i++) {
    var binding = list[i];
    if (binding.keyPattern.matchKeyDown(keyDown))
      return binding;
  }

  return null;
};
// SOURCE FILE: hterm/js/hterm_keyboard_keymap.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('hterm.Keyboard.KeyActions');

/**
 * The default key map for hterm.
 *
 * Contains a mapping of keyCodes to keyDefs (aka key definitions).  The key
 * definition tells the hterm.Keyboard class how to handle keycodes.
 *
 * This should work for most cases, as the printable characters get handled
 * in the keypress event.  In that case, even if the keycap is wrong in the
 * key map, the correct character should be sent.
 *
 * Different layouts, such as Dvorak should work with this keymap, as those
 * layouts typically move keycodes around on the keyboard without disturbing
 * the actual keycaps.
 *
 * There may be issues with control keys on non-US keyboards or with keyboards
 * that very significantly from the expectations here, in which case we may
 * have to invent new key maps.
 *
 * The sequences defined in this key map come from [XTERM] as referenced in
 * vt.js, starting with the section titled "Alt and Meta Keys".
 */
hterm.Keyboard.KeyMap = function(keyboard) {
  this.keyboard = keyboard;
  this.keyDefs = {};
  this.reset();
};

/**
 * Add a single key definition.
 *
 * The definition is a hash containing the following keys: 'keyCap', 'normal',
 * 'control', and 'alt'.
 *
 *  - keyCap is a string identifying the key.  For printable
 *    keys, the key cap should be exactly two characters, starting with the
 *    unshifted version.  For example, 'aA', 'bB', '1!' and '=+'.  For
 *    non-printable the key cap should be surrounded in square braces, as in
 *    '[INS]', '[LEFT]'.  By convention, non-printable keycaps are in uppercase
 *    but this is not a strict requirement.
 *
 *  - Normal is the action that should be performed when they key is pressed
 *    in the absence of any modifier.  See below for the supported actions.
 *
 *  - Control is the action that should be performed when they key is pressed
 *    along with the control modifier.  See below for the supported actions.
 *
 *  - Alt is the action that should be performed when they key is pressed
 *    along with the alt modifier.  See below for the supported actions.
 *
 *  - Meta is the action that should be performed when they key is pressed
 *    along with the meta modifier.  See below for the supported actions.
 *
 * Actions can be one of the hterm.Keyboard.KeyActions as documented below,
 * a literal string, or an array.  If the action is a literal string then
 * the string is sent directly to the host.  If the action is an array it
 * is taken to be an escape sequence that may be altered by modifier keys.
 * The second-to-last element of the array will be overwritten with the
 * state of the modifier keys, as specified in the final table of "PC-Style
 * Function Keys" from [XTERM].
 */
hterm.Keyboard.KeyMap.prototype.addKeyDef = function(keyCode, def) {
  if (keyCode in this.keyDefs)
    console.warn('Duplicate keyCode: ' + keyCode);

  this.keyDefs[keyCode] = def;
};

/**
 * Add multiple key definitions in a single call.
 *
 * This function takes the key definitions as variable argument list.  Each
 * argument is the key definition specified as an array.
 *
 * (If the function took everything as one big hash we couldn't detect
 * duplicates, and there would be a lot more typing involved.)
 *
 * Each key definition should have 6 elements: (keyCode, keyCap, normal action,
 * control action, alt action and meta action).  See KeyMap.addKeyDef for the
 * meaning of these elements.
 */
hterm.Keyboard.KeyMap.prototype.addKeyDefs = function(var_args) {
  for (var i = 0; i < arguments.length; i++) {
    this.addKeyDef(arguments[i][0],
                   { keyCap: arguments[i][1],
                     normal: arguments[i][2],
                     control: arguments[i][3],
                     alt: arguments[i][4],
                     meta: arguments[i][5]
                   });
  }
};

/**
 * Set up the default state for this keymap.
 */
hterm.Keyboard.KeyMap.prototype.reset = function() {
  this.keyDefs = {};

  var self = this;

  // This function is used by the "macro" functions below.  It makes it
  // possible to use the call() macro as an argument to any other macro.
  function resolve(action, e, k) {
    if (typeof action == 'function')
      return action.apply(self, [e, k]);

    return action;
  }

  // If not application keypad a, else b.  The keys that care about
  // application keypad ignore it when the key is modified.
  function ak(a, b) {
    return function(e, k) {
      var action = (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
                    !self.keyboard.applicationKeypad) ? a : b;
      return resolve(action, e, k);
    };
  }

  // If mod or not application cursor a, else b.  The keys that care about
  // application cursor ignore it when the key is modified.
  function ac(a, b) {
    return function(e, k) {
      var action = (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
                    !self.keyboard.applicationCursor) ? a : b;
      return resolve(action, e, k);
    };
  }

  // If not backspace-sends-backspace keypad a, else b.
  function bs(a, b) {
    return function(e, k) {
      var action = !self.keyboard.backspaceSendsBackspace ? a : b;
      return resolve(action, e, k);
    };
  }

  // If not e.shiftKey a, else b.
  function sh(a, b) {
    return function(e, k) {
      var action = !e.shiftKey ? a : b;
      e.maskShiftKey = true;
      return resolve(action, e, k);
    };
  }

  // If not e.altKey a, else b.
  function alt(a, b) {
    return function(e, k) {
      var action = !e.altKey ? a : b;
      return resolve(action, e, k);
    };
  }

  // If no modifiers a, else b.
  function mod(a, b) {
    return function(e, k) {
      var action = !(e.shiftKey || e.ctrlKey || e.altKey || e.metaKey) ? a : b;
      return resolve(action, e, k);
    };
  }

  // Compute a control character for a given character.
  function ctl(ch) { return String.fromCharCode(ch.charCodeAt(0) - 64) }

  // Call a method on the keymap instance.
  function c(m) { return function (e, k) { return this[m](e, k) } }

  // Ignore if not trapping media keys.
  function med(fn) {
    return function(e, k) {
      if (!self.keyboard.mediaKeysAreFKeys) {
        // Block Back, Forward, and Reload keys to avoid navigating away from
        // the current page.
        return (e.keyCode == 166 || e.keyCode == 167 || e.keyCode == 168) ?
            hterm.Keyboard.KeyActions.CANCEL :
            hterm.Keyboard.KeyActions.PASS;
      }
      return resolve(fn, e, k);
    };
  }

  var ESC = '\x1b';
  var CSI = '\x1b[';
  var SS3 = '\x1bO';

  var CANCEL = hterm.Keyboard.KeyActions.CANCEL;
  var DEFAULT = hterm.Keyboard.KeyActions.DEFAULT;
  var PASS = hterm.Keyboard.KeyActions.PASS;
  var STRIP = hterm.Keyboard.KeyActions.STRIP;

  this.addKeyDefs(
    // These fields are: [keycode, keycap, normal, control, alt, meta]

    // The browser sends the keycode 0 for some keys.  We'll just assume it's
    // going to do the right thing by default for those keys.
    [0,   '[UNKNOWN]', PASS, PASS, PASS, PASS],

    // First row.
    [27,  '[ESC]', ESC,                       DEFAULT, DEFAULT,     DEFAULT],
    [112, '[F1]',  mod(SS3 + 'P', CSI + 'P'), DEFAULT, CSI + "23~", DEFAULT],
    [113, '[F2]',  mod(SS3 + 'Q', CSI + 'Q'), DEFAULT, CSI + "24~", DEFAULT],
    [114, '[F3]',  mod(SS3 + 'R', CSI + 'R'), DEFAULT, CSI + "25~", DEFAULT],
    [115, '[F4]',  mod(SS3 + 'S', CSI + 'S'), DEFAULT, CSI + "26~", DEFAULT],
    [116, '[F5]',  CSI + '15~',               DEFAULT, CSI + "28~", DEFAULT],
    [117, '[F6]',  CSI + '17~',               DEFAULT, CSI + "29~", DEFAULT],
    [118, '[F7]',  CSI + '18~',               DEFAULT, CSI + "31~", DEFAULT],
    [119, '[F8]',  CSI + '19~',               DEFAULT, CSI + "32~", DEFAULT],
    [120, '[F9]',  CSI + '20~',               DEFAULT, CSI + "33~", DEFAULT],
    [121, '[F10]', CSI + '21~',               DEFAULT, CSI + "34~", DEFAULT],
    [122, '[F11]', CSI + '23~',               DEFAULT, CSI + "42~", DEFAULT],
    [123, '[F12]', CSI + '24~',               DEFAULT, CSI + "43~", DEFAULT],

    // Second row.
    [192, '`~', DEFAULT, sh(ctl('@'), ctl('^')),     DEFAULT,           PASS],
    [49,  '1!', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [50,  '2@', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [51,  '3#', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [52,  '4$', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [53,  '5%', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [54,  '6^', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [55,  '7&', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [56,  '8*', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [57,  '9(', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
    [48,  '0)', DEFAULT, c('onPlusMinusZero_'),c('onAltNum_'),c('onPlusMinusZero_')],
    [189, '-_', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
    [187, '=+', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
    // Firefox -_ and =+
    [173, '-_', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
    [61, '=+', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
    // Firefox Italian +*
    [171, '+*', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],

    [8,   '[BKSP]', bs('\x7f', '\b'), bs('\b', '\x7f'), DEFAULT,     DEFAULT],

    // Third row.
    [9,   '[TAB]', sh('\t', CSI + 'Z'), STRIP,     PASS,    DEFAULT],
    [81,  'qQ',    DEFAULT,             ctl('Q'),  DEFAULT, DEFAULT],
    [87,  'wW',    DEFAULT,             ctl('W'),  DEFAULT, DEFAULT],
    [69,  'eE',    DEFAULT,             ctl('E'),  DEFAULT, DEFAULT],
    [82,  'rR',    DEFAULT,             ctl('R'),  DEFAULT, DEFAULT],
    [84,  'tT',    DEFAULT,             ctl('T'),  DEFAULT, DEFAULT],
    [89,  'yY',    DEFAULT,             ctl('Y'),  DEFAULT, DEFAULT],
    [85,  'uU',    DEFAULT,             ctl('U'),  DEFAULT, DEFAULT],
    [73,  'iI',    DEFAULT,             ctl('I'),  DEFAULT, DEFAULT],
    [79,  'oO',    DEFAULT,             ctl('O'),  DEFAULT, DEFAULT],
    [80,  'pP',    DEFAULT,             ctl('P'),  DEFAULT, DEFAULT],
    [219, '[{',    DEFAULT,             ctl('['),  DEFAULT, DEFAULT],
    [221, ']}',    DEFAULT,             ctl(']'),  DEFAULT, DEFAULT],
    [220, '\\|',   DEFAULT,             ctl('\\'), DEFAULT, DEFAULT],

    // Fourth row. (We let Ctrl-Shift-J pass for Chrome DevTools.)
    [20,  '[CAPS]',  PASS,    PASS,                           PASS,    DEFAULT],
    [65,  'aA',      DEFAULT, ctl('A'),                       DEFAULT, DEFAULT],
    [83,  'sS',      DEFAULT, ctl('S'),                       DEFAULT, DEFAULT],
    [68,  'dD',      DEFAULT, ctl('D'),                       DEFAULT, DEFAULT],
    [70,  'fF',      DEFAULT, ctl('F'),                       DEFAULT, DEFAULT],
    [71,  'gG',      DEFAULT, ctl('G'),                       DEFAULT, DEFAULT],
    [72,  'hH',      DEFAULT, ctl('H'),                       DEFAULT, DEFAULT],
    [74,  'jJ',      DEFAULT, sh(ctl('J'), PASS),             DEFAULT, DEFAULT],
    [75,  'kK',      DEFAULT, sh(ctl('K'), c('onClear_')),    DEFAULT, DEFAULT],
    [76,  'lL',      DEFAULT, sh(ctl('L'), PASS),             DEFAULT, DEFAULT],
    [186, ';:',      DEFAULT, STRIP,                          DEFAULT, DEFAULT],
    [222, '\'"',     DEFAULT, STRIP,                          DEFAULT, DEFAULT],
    [13,  '[ENTER]', '\r',    CANCEL,                         CANCEL,  DEFAULT],

    // Fifth row.  This includes the copy/paste shortcuts.  On some
    // platforms it's Ctrl-C/V, on others it's Meta-C/V.  We assume either
    // Ctrl-C/Meta-C should pass to the browser when there is a selection,
    // and Ctrl-Shift-V/Meta-*-V should always pass to the browser (since
    // these seem to be recognized as paste too).
    [16,  '[SHIFT]', PASS, PASS,                   PASS,    DEFAULT],
    [90,  'zZ',   DEFAULT, ctl('Z'),               DEFAULT, DEFAULT],
    [88,  'xX',   DEFAULT, ctl('X'),               DEFAULT, DEFAULT],
    [67,  'cC',   DEFAULT, c('onCtrlC_'),          DEFAULT, c('onMetaC_')],
    [86,  'vV',   DEFAULT, c('onCtrlV_'),          DEFAULT, c('onMetaV_')],
    [66,  'bB',   DEFAULT, sh(ctl('B'), PASS),     DEFAULT, sh(DEFAULT, PASS)],
    [78,  'nN',   DEFAULT, c('onCtrlN_'),          DEFAULT, c('onMetaN_')],
    [77,  'mM',   DEFAULT, ctl('M'),               DEFAULT, DEFAULT],
    [188, ',<',   DEFAULT, alt(STRIP, PASS),       DEFAULT, DEFAULT],
    [190, '.>',   DEFAULT, alt(STRIP, PASS),       DEFAULT, DEFAULT],
    [191, '/?',   DEFAULT, sh(ctl('_'), ctl('?')), DEFAULT, DEFAULT],

    // Sixth and final row.
    [17,  '[CTRL]',  PASS,    PASS,     PASS,    PASS],
    [18,  '[ALT]',   PASS,    PASS,     PASS,    PASS],
    [91,  '[LAPL]',  PASS,    PASS,     PASS,    PASS],
    [32,  ' ',       DEFAULT, ctl('@'), DEFAULT, DEFAULT],
    [92,  '[RAPL]',  PASS,    PASS,     PASS,    PASS],
    [93,  '[RMENU]', PASS,    PASS,     PASS,    PASS],

    // These things.
    [42,  '[PRTSCR]', PASS, PASS, PASS, PASS],
    [145, '[SCRLK]',  PASS, PASS, PASS, PASS],
    [19,  '[BREAK]',  PASS, PASS, PASS, PASS],

    // The block of six keys above the arrows.
    [45,  '[INSERT]', c('onKeyInsert_'),   DEFAULT, DEFAULT, DEFAULT],
    [36,  '[HOME]',   c('onKeyHome_'),     DEFAULT, DEFAULT, DEFAULT],
    [33,  '[PGUP]',   c('onKeyPageUp_'),   DEFAULT, DEFAULT, DEFAULT],
    [46,  '[DEL]',    c('onKeyDel_'),      DEFAULT, DEFAULT, DEFAULT],
    [35,  '[END]',    c('onKeyEnd_'),      DEFAULT, DEFAULT, DEFAULT],
    [34,  '[PGDOWN]', c('onKeyPageDown_'), DEFAULT, DEFAULT, DEFAULT],

    // Arrow keys.  When unmodified they respect the application cursor state,
    // otherwise they always send the CSI codes.
    [38, '[UP]',    ac(CSI + 'A', SS3 + 'A'), DEFAULT, DEFAULT, DEFAULT],
    [40, '[DOWN]',  ac(CSI + 'B', SS3 + 'B'), DEFAULT, DEFAULT, DEFAULT],
    [39, '[RIGHT]', ac(CSI + 'C', SS3 + 'C'), DEFAULT, DEFAULT, DEFAULT],
    [37, '[LEFT]',  ac(CSI + 'D', SS3 + 'D'), DEFAULT, DEFAULT, DEFAULT],

    [144, '[NUMLOCK]', PASS, PASS, PASS, PASS],

    // With numlock off, the keypad generates the same key codes as the arrows
    // and 'block of six' for some keys, and null key codes for the rest.

    // Keypad with numlock on generates unique key codes...
    [96,  '[KP0]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [97,  '[KP1]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [98,  '[KP2]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [99,  '[KP3]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [100, '[KP4]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [101, '[KP5]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [102, '[KP6]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [103, '[KP7]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [104, '[KP8]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [105, '[KP9]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [107, '[KP+]', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
    [109, '[KP-]', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
    [106, '[KP*]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [111, '[KP/]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
    [110, '[KP.]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],

    // Chrome OS keyboard top row.
    [166, '[BACK]',   med(mod(SS3+'P', CSI+'P')), DEFAULT, CSI+"23~", DEFAULT],
    [167, '[FWD]',    med(mod(SS3+'Q', CSI+'Q')), DEFAULT, CSI+"24~", DEFAULT],
    [168, '[RELOAD]', med(mod(SS3+'R', CSI+'R')), DEFAULT, CSI+"25~", DEFAULT],
    [183, '[FSCR]',   med(mod(SS3+'S', CSI+'S')), DEFAULT, CSI+"26~", DEFAULT],
    [182, '[WINS]',   med(CSI + '15~'),           DEFAULT, CSI+"28~", DEFAULT],
    [216, '[BRIT-]',  med(CSI + '17~'),           DEFAULT, CSI+"29~", DEFAULT],
    [217, '[BRIT+]',  med(CSI + '18~'),           DEFAULT, CSI+"31~", DEFAULT]

    // 173 [MUTE], 174 [VOL-] and 175 [VOL+] are trapped by the Chrome OS
    // window manager, so we'll never see them. Note that 173 is also
    // Firefox's -_ keycode.
  );
};

/**
 * Either allow the paste or send a key sequence.
 */
hterm.Keyboard.KeyMap.prototype.onKeyInsert_ = function(e) {
  if (this.keyboard.shiftInsertPaste && e.shiftKey)
    return hterm.Keyboard.KeyActions.PASS;

  return '\x1b[2~';
};

/**
 * Either scroll the scrollback buffer or send a key sequence.
 */
hterm.Keyboard.KeyMap.prototype.onKeyHome_ = function(e) {
  if (!this.keyboard.homeKeysScroll ^ e.shiftKey) {
    if ((e.altey || e.ctrlKey || e.shiftKey) ||
        !this.keyboard.applicationCursor) {
      return '\x1b[H';
    }

    return '\x1bOH';
  }

  this.keyboard.terminal.scrollHome();
  return hterm.Keyboard.KeyActions.CANCEL;
};

/**
 * Either scroll the scrollback buffer or send a key sequence.
 */
hterm.Keyboard.KeyMap.prototype.onKeyEnd_ = function(e) {
  if (!this.keyboard.homeKeysScroll ^ e.shiftKey) {
    if ((e.altKey || e.ctrlKey || e.shiftKey) ||
        !this.keyboard.applicationCursor) {
      return '\x1b[F';
    }

    return '\x1bOF';
  }

  this.keyboard.terminal.scrollEnd();
  return hterm.Keyboard.KeyActions.CANCEL;
};

/**
 * Either scroll the scrollback buffer or send a key sequence.
 */
hterm.Keyboard.KeyMap.prototype.onKeyPageUp_ = function(e) {
  if (!this.keyboard.pageKeysScroll ^ e.shiftKey)
    return '\x1b[5~';

  this.keyboard.terminal.scrollPageUp();
  return hterm.Keyboard.KeyActions.CANCEL;
};

/**
 * Either send a true DEL, or sub in meta-backspace.
 *
 * On Chrome OS, if we know the alt key is down, but we get a DEL event that
 * claims that the alt key is not pressed, we know the DEL was a synthetic
 * one from a user that hit alt-backspace. Based on a user pref, we can sub
 * in meta-backspace in this case.
 */
hterm.Keyboard.KeyMap.prototype.onKeyDel_ = function(e) {
  if (this.keyboard.altBackspaceIsMetaBackspace &&
      this.keyboard.altKeyPressed && !e.altKey)
    return '\x1b\x7f';
  return '\x1b[3~';
};

/**
 * Either scroll the scrollback buffer or send a key sequence.
 */
hterm.Keyboard.KeyMap.prototype.onKeyPageDown_ = function(e) {
  if (!this.keyboard.pageKeysScroll ^ e.shiftKey)
    return '\x1b[6~';

  this.keyboard.terminal.scrollPageDown();
  return hterm.Keyboard.KeyActions.CANCEL;
};

/**
 * Clear the primary/alternate screens and the scrollback buffer.
 */
hterm.Keyboard.KeyMap.prototype.onClear_ = function(e, keyDef) {
  this.keyboard.terminal.wipeContents();
  return hterm.Keyboard.KeyActions.CANCEL;
};

/**
 * Either pass Ctrl-1..9 to the browser or send them to the host.
 *
 * Note that Ctrl-1 and Ctrl-9 don't actually have special sequences mapped
 * to them in xterm or gnome-terminal.  The range is really Ctrl-2..8, but
 * we handle 1..9 since Chrome treats the whole range special.
 */
hterm.Keyboard.KeyMap.prototype.onCtrlNum_ = function(e, keyDef) {
  // Compute a control character for a given character.
  function ctl(ch) { return String.fromCharCode(ch.charCodeAt(0) - 64) }

  if (this.keyboard.terminal.passCtrlNumber && !e.shiftKey)
    return hterm.Keyboard.KeyActions.PASS;

  switch (keyDef.keyCap.substr(0, 1)) {
    case '1': return '1';
    case '2': return ctl('@');
    case '3': return ctl('[');
    case '4': return ctl('\\');
    case '5': return ctl(']');
    case '6': return ctl('^');
    case '7': return ctl('_');
    case '8': return '\x7f';
    case '9': return '9';
  }
};

/**
 * Either pass Alt-1..9 to the browser or send them to the host.
 */
hterm.Keyboard.KeyMap.prototype.onAltNum_ = function(e, keyDef) {
  if (this.keyboard.terminal.passAltNumber && !e.shiftKey)
    return hterm.Keyboard.KeyActions.PASS;

  return hterm.Keyboard.KeyActions.DEFAULT;
};

/**
 * Either pass Meta-1..9 to the browser or send them to the host.
 */
hterm.Keyboard.KeyMap.prototype.onMetaNum_ = function(e, keyDef) {
  if (this.keyboard.terminal.passMetaNumber && !e.shiftKey)
    return hterm.Keyboard.KeyActions.PASS;

  return hterm.Keyboard.KeyActions.DEFAULT;
};

/**
 * Either send a ^C or interpret the keystroke as a copy command.
 */
hterm.Keyboard.KeyMap.prototype.onCtrlC_ = function(e, keyDef) {
  var selection = this.keyboard.terminal.getDocument().getSelection();

  if (!selection.isCollapsed) {
    if (this.keyboard.ctrlCCopy && !e.shiftKey) {
      // Ctrl-C should copy if there is a selection, send ^C otherwise.
      // Perform the copy by letting the browser handle Ctrl-C.  On most
      // browsers, this is the *only* way to place text on the clipboard from
      // the 'drive-by' web.
      if (this.keyboard.terminal.clearSelectionAfterCopy) {
        setTimeout(selection.collapseToEnd.bind(selection), 50);
      }
      return hterm.Keyboard.KeyActions.PASS;
    }

    if (!this.keyboard.ctrlCCopy && e.shiftKey) {
      // Ctrl-Shift-C should copy if there is a selection, send ^C otherwise.
      // Perform the copy manually.  This only works in situations where
      // document.execCommand('copy') is allowed.
      if (this.keyboard.terminal.clearSelectionAfterCopy) {
        setTimeout(selection.collapseToEnd.bind(selection), 50);
      }
      this.keyboard.terminal.copySelectionToClipboard();
      return hterm.Keyboard.KeyActions.CANCEL;
    }
  }

  return '\x03';
};

/**
 * Either send a ^N or open a new window to the same location.
 */
hterm.Keyboard.KeyMap.prototype.onCtrlN_ = function(e, keyDef) {
  if (e.shiftKey) {
    window.open(document.location.href, '',
                'chrome=no,close=yes,resize=yes,scrollbars=yes,' +
                'minimizable=yes,width=' + window.innerWidth +
                ',height=' + window.innerHeight);
    return hterm.Keyboard.KeyActions.CANCEL;
  }

  return '\x0e';
};

/**
 * Either send a ^V or allow the browser to interpret the keystroke as a paste
 * command.
 *
 * The default behavior is to paste if the user presses Ctrl-Shift-V, and send
 * a ^V if the user presses Ctrl-V. This can be flipped with the
 * 'ctrl-v-paste' preference.
 */
hterm.Keyboard.KeyMap.prototype.onCtrlV_ = function(e, keyDef) {
  if ((!e.shiftKey && this.keyboard.ctrlVPaste) ||
      (e.shiftKey && !this.keyboard.ctrlVPaste)) {
    return hterm.Keyboard.KeyActions.PASS;
  }

  return '\x16';
};

/**
 * Either the default action or open a new window to the same location.
 */
hterm.Keyboard.KeyMap.prototype.onMetaN_ = function(e, keyDef) {
  if (e.shiftKey) {
    window.open(document.location.href, '',
                'chrome=no,close=yes,resize=yes,scrollbars=yes,' +
                'minimizable=yes,width=' + window.outerWidth +
                ',height=' + window.outerHeight);
    return hterm.Keyboard.KeyActions.CANCEL;
  }

  return hterm.Keyboard.KeyActions.DEFAULT;
};

/**
 * Either send a Meta-C or allow the browser to interpret the keystroke as a
 * copy command.
 *
 * If there is no selection, or if the user presses Meta-Shift-C, then we'll
 * transmit an '\x1b' (if metaSendsEscape is on) followed by 'c' or 'C'.
 *
 * If there is a selection, we defer to the browser.  In this case we clear out
 * the selection so the user knows we heard them, and also to give them a
 * chance to send a Meta-C by just hitting the key again.
 */
hterm.Keyboard.KeyMap.prototype.onMetaC_ = function(e, keyDef) {
  var document = this.keyboard.terminal.getDocument();
  if (e.shiftKey || document.getSelection().isCollapsed) {
    // If the shift key is being held, or there is no document selection, send
    // a Meta-C.  The keyboard code will add the ESC if metaSendsEscape is true,
    // we just have to decide between 'c' and 'C'.
    return keyDef.keyCap.substr(e.shiftKey ? 1 : 0, 1);
  }

  // Otherwise let the browser handle it as a copy command.
  if (this.keyboard.terminal.clearSelectionAfterCopy) {
    setTimeout(function() { document.getSelection().collapseToEnd() }, 50);
  }
  return hterm.Keyboard.KeyActions.PASS;
};

/**
 * Either PASS or DEFAULT Meta-V, depending on preference.
 *
 * Always PASS Meta-Shift-V to allow browser to interpret the keystroke as
 * a paste command.
 */
hterm.Keyboard.KeyMap.prototype.onMetaV_ = function(e, keyDef) {
  if (e.shiftKey)
    return hterm.Keyboard.KeyActions.PASS;

  return this.keyboard.passMetaV ?
      hterm.Keyboard.KeyActions.PASS :
      hterm.Keyboard.KeyActions.DEFAULT;
};

/**
 * Handle font zooming.
 *
 * The browser's built-in zoom has a bit of an issue at certain zoom levels.
 * At some magnifications, the measured height of a row of text differs from
 * the height that was explicitly set.
 *
 * We override the browser zoom keys to change the ScrollPort's font size to
 * avoid the issue.
 */
hterm.Keyboard.KeyMap.prototype.onPlusMinusZero_ = function(e, keyDef) {
  if (!(this.keyboard.ctrlPlusMinusZeroZoom ^ e.shiftKey)) {
    // If ctrl-PMZ controls zoom and the shift key is pressed, or
    // ctrl-shift-PMZ controls zoom and this shift key is not pressed,
    // then we want to send the control code instead of affecting zoom.
    if (keyDef.keyCap == '-_')
      return '\x1f';  // ^_

    // Only ^_ is valid, the other sequences have no meaning.
    return hterm.Keyboard.KeyActions.CANCEL;
  }

  if (this.keyboard.terminal.getZoomFactor() != 1) {
    // If we're not at 1:1 zoom factor, let the Ctrl +/-/0 keys control the
    // browser zoom, so it's easier to for the user to get back to 100%.
    return hterm.Keyboard.KeyActions.PASS;
  }

  var cap = keyDef.keyCap.substr(0, 1);
  if (cap == '0') {
      this.keyboard.terminal.setFontSize(0);
  } else {
    var size = this.keyboard.terminal.getFontSize();

    if (cap == '-' || keyDef.keyCap == '[KP-]') {
      size -= 1;
    } else {
      size += 1;
    }

    this.keyboard.terminal.setFontSize(size);
  }

  return hterm.Keyboard.KeyActions.CANCEL;
};
// SOURCE FILE: hterm/js/hterm_keyboard_keypattern.js
// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * A record of modifier bits and keycode used to define a key binding.
 *
 * The modifier names are enumerated in the static KeyPattern.modifiers
 * property below.  Each modifier can be true, false, or "*".  True means
 * the modifier key must be present, false means it must not, and "*" means
 * it doesn't matter.
 */
hterm.Keyboard.KeyPattern = function(spec) {
  this.wildcardCount = 0;
  this.keyCode = spec.keyCode;

  hterm.Keyboard.KeyPattern.modifiers.forEach(function(mod) {
    this[mod] = spec[mod] || false;
    if (this[mod] == '*')
      this.wildcardCount++;
  }.bind(this));
};

/**
 * Valid modifier names.
 */
hterm.Keyboard.KeyPattern.modifiers = [
  'shift', 'ctrl', 'alt', 'meta'
];

/**
 * A compare callback for Array.prototype.sort().
 *
 * The bindings code wants to be sure to search through the strictest key
 * patterns first, so that loosely defined patterns have a lower priority than
 * exact patterns.
 *
 * @param {hterm.Keyboard.KeyPattern} a
 * @param {hterm.Keyboard.KeyPattern} b
 */
hterm.Keyboard.KeyPattern.sortCompare = function(a, b) {
  if (a.wildcardCount < b.wildcardCount)
    return -1;

  if (a.wildcardCount > b.wildcardCount)
    return 1;

  return 0;
};

/**
 * Private method used to match this key pattern against other key patterns
 * or key down events.
 *
 * @param {Object} The object to match.
 * @param {boolean} True if we should ignore wildcards.  Useful when you want
 *   to perform and exact match against another key pattern.
 */
hterm.Keyboard.KeyPattern.prototype.match_ = function(obj, exactMatch) {
  if (this.keyCode != obj.keyCode)
    return false;

  var rv = true;

  hterm.Keyboard.KeyPattern.modifiers.forEach(function(mod) {
    var modValue = (mod in obj) ? obj[mod] : false;
    if (!rv || (!exactMatch && this[mod] == '*') || this[mod] == modValue)
      return;

    rv = false;
  }.bind(this));

  return rv;
};

/**
 * Return true if the given keyDown object is a match for this key pattern.
 *
 * @param {Object} keyDown An object with a keyCode property and zero or
 *   more boolean properties representing key modifiers.  These property names
 *   must match those defined in hterm.Keyboard.KeyPattern.modifiers.
 */
hterm.Keyboard.KeyPattern.prototype.matchKeyDown = function(keyDown) {
  return this.match_(keyDown, false);
};

/**
 * Return true if the given hterm.Keyboard.KeyPattern is exactly the same as
 * this one.
 *
 * @param {hterm.Keyboard.KeyPattern}
 */
hterm.Keyboard.KeyPattern.prototype.matchKeyPattern = function(keyPattern) {
  return this.match_(keyPattern, true);
};
// SOURCE FILE: hterm/js/hterm_options.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * @fileoverview This file implements the hterm.Options class,
 * which stores current operating conditions for the terminal.  This object is
 * used instead of a series of parameters to allow saving/restoring of cursor
 * conditions easily, and to provide an easy place for common configuration
 * options.
 *
 * Original code by Cory Maccarrone.
 */

/**
 * Constructor for the hterm.Options class, optionally acting as a copy
 * constructor.
 *
 * The defaults are as defined in http://www.vt100.net/docs/vt510-rm/DECSTR
 * except that we enable autowrap (wraparound) by default since that seems to
 * be what xterm does.
 *
 * @param {hterm.Options=} opt_copy Optional instance to copy.
 * @constructor
 */
hterm.Options = function(opt_copy) {
  // All attributes in this class are public to allow easy access by the
  // terminal.

  this.wraparound = opt_copy ? opt_copy.wraparound : true;
  this.reverseWraparound = opt_copy ? opt_copy.reverseWraparound : false;
  this.originMode = opt_copy ? opt_copy.originMode : false;
  this.autoCarriageReturn = opt_copy ? opt_copy.autoCarriageReturn : false;
  this.cursorVisible = opt_copy ? opt_copy.cursorVisible : false;
  this.cursorBlink = opt_copy ? opt_copy.cursorBlink : false;
  this.insertMode = opt_copy ? opt_copy.insertMode : false;
  this.reverseVideo = opt_copy ? opt_copy.reverseVideo : false;
  this.bracketedPaste = opt_copy ? opt_copy.bracketedPaste : false;
};
// SOURCE FILE: hterm/js/hterm_parser.js
// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('hterm.Keyboard.KeyActions');

/**
 * @constructor
 * Parses the key definition syntax used for user keyboard customizations.
 */
hterm.Parser = function() {
  /**
   * @type {string} The source string.
   */
  this.source = '';

  /**
   * @type {number} The current position.
   */
  this.pos = 0;

  /**
   * @type {string?} The character at the current position.
   */
  this.ch = null;
};

hterm.Parser.prototype.error = function(message) {
  return new Error('Parse error at ' + this.pos + ': ' + message);
};

hterm.Parser.prototype.isComplete = function() {
  return this.pos == this.source.length;
};

hterm.Parser.prototype.reset = function(source, opt_pos) {
  this.source = source;
  this.pos = opt_pos || 0;
  this.ch = source.substr(0, 1);
};

/**
 * Parse a key sequence.
 *
 * A key sequence is zero or more of the key modifiers defined in
 * hterm.Parser.identifiers.modifierKeys followed by a key code.  Key
 * codes can be an integer or an identifier from
 * hterm.Parser.identifiers.keyCodes.  Modifiers and keyCodes should be joined
 * by the dash character.
 *
 * An asterisk "*" can be used to indicate that the unspecified modifiers
 * are optional.
 *
 * For example:
 *   A: Matches only an unmodified "A" character.
 *   65: Same as above.
 *   0x41: Same as above.
 *   Ctrl-A: Matches only Ctrl-A.
 *   Ctrl-65: Same as above.
 *   Ctrl-0x41: Same as above.
 *   Ctrl-Shift-A: Matches only Ctrl-Shift-A.
 *   Ctrl-*-A: Matches Ctrl-A, as well as any other key sequence that includes
 *     at least the Ctrl and A keys.
 *
 * @return {Object} An object with shift, ctrl, alt, meta, keyCode
 *   properties.
 */
hterm.Parser.prototype.parseKeySequence = function() {
  var rv = {
    keyCode: null
  };

  for (var k in hterm.Parser.identifiers.modifierKeys) {
    rv[hterm.Parser.identifiers.modifierKeys[k]] = false;
  }

  while (this.pos < this.source.length) {
    this.skipSpace();

    var token = this.parseToken();
    if (token.type == 'integer') {
      rv.keyCode = token.value;

    } else if (token.type == 'identifier') {
      if (token.value in hterm.Parser.identifiers.modifierKeys) {
        var mod = hterm.Parser.identifiers.modifierKeys[token.value];
        if (rv[mod] && rv[mod] != '*')
          throw this.error('Duplicate modifier: ' + token.value);
        rv[mod] = true;

      } else if (token.value in hterm.Parser.identifiers.keyCodes) {
        rv.keyCode = hterm.Parser.identifiers.keyCodes[token.value];

      } else {
        throw this.error('Unknown key: ' + token.value);
      }

    } else if (token.type == 'symbol') {
      if (token.value == '*') {
        for (var id in hterm.Parser.identifiers.modifierKeys) {
          var p = hterm.Parser.identifiers.modifierKeys[id];
          if (!rv[p])
            rv[p] =  '*';
        }
      } else {
        throw this.error('Unexpected symbol: ' + token.value);
      }
    } else {
      throw this.error('Expected integer or identifier');
    }

    this.skipSpace();

    if (this.ch != '-')
      break;

    if (rv.keyCode != null)
      throw this.error('Extra definition after target key');

    this.advance(1);
  }

  if (rv.keyCode == null)
    throw this.error('Missing target key');

  return rv;
};

hterm.Parser.prototype.parseKeyAction = function() {
  this.skipSpace();

  var token = this.parseToken();

  if (token.type == 'string')
    return token.value;

  if (token.type == 'identifier') {
    if (token.value in hterm.Parser.identifiers.actions)
      return hterm.Parser.identifiers.actions[token.value];

    throw this.error('Unknown key action: ' + token.value);
  }

  throw this.error('Expected string or identifier');

};

hterm.Parser.prototype.peekString = function() {
  return this.ch == '\'' || this.ch == '"';
};

hterm.Parser.prototype.peekIdentifier = function() {
  return this.ch.match(/[a-z_]/i);
};

hterm.Parser.prototype.peekInteger = function() {
  return this.ch.match(/[0-9]/);
};

hterm.Parser.prototype.parseToken = function() {
  if (this.ch == '*') {
    var rv = {type: 'symbol', value: this.ch};
    this.advance(1);
    return rv;
  }

  if (this.peekIdentifier())
    return {type: 'identifier', value: this.parseIdentifier()};

  if (this.peekString())
    return {type: 'string', value: this.parseString()};

  if (this.peekInteger())
    return {type: 'integer', value: this.parseInteger()};


  throw this.error('Unexpected token');
};

hterm.Parser.prototype.parseIdentifier = function() {
  if (!this.peekIdentifier())
    throw this.error('Expected identifier');

  return this.parsePattern(/[a-z0-9_]+/ig);
};

hterm.Parser.prototype.parseInteger = function() {
  var base = 10;

  if (this.ch == '0' && this.pos < this.source.length - 1 &&
      this.source.substr(this.pos + 1, 1) == 'x') {
    return parseInt(this.parsePattern(/0x[0-9a-f]+/gi));
  }

  return parseInt(this.parsePattern(/\d+/g));
};

/**
 * Parse a single or double quoted string.
 *
 * The current position should point at the initial quote character.  Single
 * quoted strings will be treated literally, double quoted will process escapes.
 *
 * TODO(rginda): Variable interpolation.
 *
 * @param {ParseState} parseState
 * @param {string} quote A single or double-quote character.
 * @return {string}
 */
hterm.Parser.prototype.parseString = function() {
  var result = '';

  var quote = this.ch;
  if (quote != '"' && quote != '\'')
    throw this.error('String expected');

  this.advance(1);

  var re = new RegExp('[\\\\' + quote + ']', 'g');

  while (this.pos < this.source.length) {
    re.lastIndex = this.pos;
    if (!re.exec(this.source))
      throw this.error('Unterminated string literal');

    result += this.source.substring(this.pos, re.lastIndex - 1);

    this.advance(re.lastIndex - this.pos - 1);

    if (quote == '"' && this.ch == '\\') {
      this.advance(1);
      result += this.parseEscape();
      continue;
    }

    if (quote == '\'' && this.ch == '\\') {
      result += this.ch;
      this.advance(1);
      continue;
    }

    if (this.ch == quote) {
      this.advance(1);
      return result;
    }
  }

  throw this.error('Unterminated string literal');
};


/**
 * Parse an escape code from the current position (which should point to
 * the first character AFTER the leading backslash.)
 *
 * @return {string}
 */
hterm.Parser.prototype.parseEscape = function() {
  var map = {
    '"': '"',
    '\'': '\'',
    '\\': '\\',
    'a': '\x07',
    'b': '\x08',
    'e': '\x1b',
    'f': '\x0c',
    'n': '\x0a',
    'r': '\x0d',
    't': '\x09',
    'v': '\x0b',
    'x': function() {
      var value = this.parsePattern(/[a-z0-9]{2}/ig);
      return String.fromCharCode(parseInt(value, 16));
    },
    'u': function() {
      var value = this.parsePattern(/[a-z0-9]{4}/ig);
      return String.fromCharCode(parseInt(value, 16));
    }
  };

  if (!(this.ch in map))
    throw this.error('Unknown escape: ' + this.ch);

  var value = map[this.ch];
  this.advance(1);

  if (typeof value == 'function')
    value = value.call(this);

  return value;
};

/**
 * Parse the given pattern starting from the current position.
 *
 * @param {RegExp} pattern A pattern representing the characters to span.  MUST
 *   include the "global" RegExp flag.
 * @return {string}
 */
hterm.Parser.prototype.parsePattern = function(pattern) {
  if (!pattern.global)
    throw this.error('Internal error: Span patterns must be global');

  pattern.lastIndex = this.pos;
  var ary = pattern.exec(this.source);

  if (!ary || pattern.lastIndex - ary[0].length != this.pos)
    throw this.error('Expected match for: ' + pattern);

  this.pos = pattern.lastIndex - 1;
  this.advance(1);

  return ary[0];
};


/**
 * Advance the current position.
 *
 * @param {number} count
 */
hterm.Parser.prototype.advance = function(count) {
  this.pos += count;
  this.ch = this.source.substr(this.pos, 1);
};

/**
 * @param {string=} opt_expect A list of valid non-whitespace characters to
 *   terminate on.
 * @return {void}
 */
hterm.Parser.prototype.skipSpace = function(opt_expect) {
  if (!/\s/.test(this.ch))
    return;

  var re = /\s+/gm;
  re.lastIndex = this.pos;

  var source = this.source;
  if (re.exec(source))
    this.pos = re.lastIndex;

  this.ch = this.source.substr(this.pos, 1);

  if (opt_expect) {
    if (this.ch.indexOf(opt_expect) == -1) {
      throw this.error('Expected one of ' + opt_expect + ', found: ' +
          this.ch);
    }
  }
};
// SOURCE FILE: hterm/js/hterm_parser_identifiers.js
// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Collections of identifier for hterm.Parser.
 */
hterm.Parser.identifiers = {};

hterm.Parser.identifiers.modifierKeys = {
  Shift: 'shift',
  Ctrl: 'ctrl',
  Alt: 'alt',
  Meta: 'meta'
};

/**
 * Key codes useful when defining key sequences.
 *
 * Punctuation is mostly left out of this list because they can move around
 * based on keyboard locale and browser.
 *
 * In a key sequence like "Ctrl-ESC", the ESC comes from this list of
 * identifiers.  It is equivalent to "Ctrl-27" and "Ctrl-0x1b".
 */
hterm.Parser.identifiers.keyCodes = {
  // Top row.
  ESC: 27,
  F1: 112,
  F2: 113,
  F3: 114,
  F4: 115,
  F5: 116,
  F6: 117,
  F7: 118,
  F8: 119,
  F9: 120,
  F10: 121,
  F11: 122,
  F12: 123,

  // Row two.
  ONE: 49,
  TWO: 50,
  THREE: 51,
  FOUR: 52,
  FIVE: 53,
  SIX: 54,
  SEVEN: 55,
  EIGHT: 56,
  NINE: 57,
  ZERO: 48,
  BACKSPACE: 8,

  // Row three.
  TAB: 9,
  Q: 81,
  W: 87,
  E: 69,
  R: 82,
  T: 84,
  Y: 89,
  U: 85,
  I: 73,
  O: 79,
  P: 80,

  // Row four.
  CAPSLOCK: 20,
  A: 65,
  S: 83,
  D: 68,
  F: 70,
  G: 71,
  H: 72,
  J: 74,
  K: 75,
  L: 76,
  ENTER: 13,

  // Row five.
  Z: 90,
  X: 88,
  C: 67,
  V: 86,
  B: 66,
  N: 78,
  M: 77,

  // Etc.
  SPACE: 32,
  PRINT_SCREEN: 42,
  SCROLL_LOCK: 145,
  BREAK: 19,
  INSERT: 45,
  HOME: 36,
  PGUP: 33,
  DEL: 46,
  END: 35,
  PGDOWN: 34,
  UP: 38,
  DOWN: 40,
  RIGHT: 39,
  LEFT: 37,
  NUMLOCK: 144,

  // Keypad
  KP0: 96,
  KP1: 97,
  KP2: 98,
  KP3: 99,
  KP4: 100,
  KP5: 101,
  KP6: 102,
  KP7: 103,
  KP8: 104,
  KP9: 105,
  KP_PLUS: 107,
  KP_MINUS: 109,
  KP_STAR: 106,
  KP_DIVIDE: 111,
  KP_DECIMAL: 110,

  // Chrome OS media keys
  NAVIGATE_BACK: 166,
  NAVIGATE_FORWARD: 167,
  RELOAD: 168,
  FULL_SCREEN: 183,
  WINDOW_OVERVIEW: 182,
  BRIGHTNESS_UP: 216,
  BRIGHTNESS_DOWN: 217
};

/**
 * Identifiers for use in key actions.
 */
hterm.Parser.identifiers.actions = {
  /**
   * Prevent the browser and operating system from handling the event.
   */
  CANCEL: hterm.Keyboard.KeyActions.CANCEL,

  /**
   * Wait for a "keypress" event, send the keypress charCode to the host.
   */
  DEFAULT: hterm.Keyboard.KeyActions.DEFAULT,

  /**
   * Let the browser or operating system handle the key.
   */
  PASS: hterm.Keyboard.KeyActions.PASS,

  /**
   * Scroll the terminal one page up.
   */
  scrollPageUp: function(terminal) {
    terminal.scrollPageUp();
    return hterm.Keyboard.KeyActions.CANCEL;
  },

  /**
   * Scroll the terminal one page down.
   */
  scrollPageDown: function(terminal) {
    terminal.scrollPageDown();
    return hterm.Keyboard.KeyActions.CANCEL;
  },

  /**
   * Scroll the terminal to the top.
   */
  scrollToTop: function(terminal) {
    terminal.scrollEnd();
    return hterm.Keyboard.KeyActions.CANCEL;
  },

  /**
   * Scroll the terminal to the bottom.
   */
  scrollToBottom: function(terminal) {
    terminal.scrollEnd();
    return hterm.Keyboard.KeyActions.CANCEL;
  },

  /**
   * Clear the terminal and scrollback buffer.
   */
  clearScrollback: function(terminal) {
    terminal.wipeContents();
    return hterm.Keyboard.KeyActions.CANCEL;
  }
};
// SOURCE FILE: hterm/js/hterm_preference_manager.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.f', 'lib.Storage');

/**
 * PreferenceManager subclass managing global NaSSH preferences.
 *
 * This is currently just an ordered list of known connection profiles.
 */
hterm.PreferenceManager = function(profileId) {
  lib.PreferenceManager.call(this, hterm.defaultStorage,
                             '/hterm/profiles/' + profileId);
  var defs = hterm.PreferenceManager.defaultPreferences;
  Object.keys(defs).forEach(function(key) {
    this.definePreference(key, defs[key][1]);
  }.bind(this));
};

hterm.PreferenceManager.categories = {};
hterm.PreferenceManager.categories.Keyboard = 'Keyboard';
hterm.PreferenceManager.categories.Appearance = 'Appearance';
hterm.PreferenceManager.categories.CopyPaste = 'CopyPaste';
hterm.PreferenceManager.categories.Sounds = 'Sounds';
hterm.PreferenceManager.categories.Scrolling = 'Scrolling';
hterm.PreferenceManager.categories.Encoding = 'Encoding';
hterm.PreferenceManager.categories.Miscellaneous = 'Miscellaneous';

/**
 * List of categories, ordered by display order (top to bottom)
 */
hterm.PreferenceManager.categoryDefinitions = [
  { id: hterm.PreferenceManager.categories.Appearance,
    text: 'Appearance (fonts, colors, images)'},
  { id: hterm.PreferenceManager.categories.CopyPaste,
    text: 'Copy & Paste'},
  { id: hterm.PreferenceManager.categories.Encoding,
    text: 'Encoding'},
  { id: hterm.PreferenceManager.categories.Keyboard,
    text: 'Keyboard'},
  { id: hterm.PreferenceManager.categories.Scrolling,
    text: 'Scrolling'},
  { id: hterm.PreferenceManager.categories.Sounds,
    text: 'Sounds'},
  { id: hterm.PreferenceManager.categories.Miscellaneous,
    text: 'Misc.'}
];


hterm.PreferenceManager.defaultPreferences = {
  'alt-gr-mode':
  [hterm.PreferenceManager.categories.Keyboard, null,
   [null, 'none', 'ctrl-alt', 'left-alt', 'right-alt'],
   'Select an AltGr detection hack^Wheuristic.\n' +
   '\n' +
   '\'null\': Autodetect based on navigator.language:\n' +
   '      \'en-us\' => \'none\', else => \'right-alt\'\n' +
   '\'none\': Disable any AltGr related munging.\n' +
   '\'ctrl-alt\': Assume Ctrl+Alt means AltGr.\n' +
   '\'left-alt\': Assume left Alt means AltGr.\n' +
   '\'right-alt\': Assume right Alt means AltGr.\n'],

  'alt-backspace-is-meta-backspace':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'If set, undoes the Chrome OS Alt-Backspace->DEL remap, so that ' +
   'alt-backspace indeed is alt-backspace.'],

  'alt-is-meta':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'Set whether the alt key acts as a meta key or as a distinct alt key.'],

  'alt-sends-what':
  [hterm.PreferenceManager.categories.Keyboard, 'escape',
   ['escape', '8-bit', 'browser-key'],
   'Controls how the alt key is handled.\n' +
   '\n' +
   '  escape....... Send an ESC prefix.\n' +
   '  8-bit........ Add 128 to the unshifted character as in xterm.\n' +
   '  browser-key.. Wait for the keypress event and see what the browser \n' +
   '                says.  (This won\'t work well on platforms where the \n' +
   '                browser performs a default action for some alt sequences.)'
  ],

  'audible-bell-sound':
  [hterm.PreferenceManager.categories.Sounds, 'lib-resource:hterm/audio/bell',
   'url',
   'URL of the terminal bell sound.  Empty string for no audible bell.'],

  'desktop-notification-bell':
  [hterm.PreferenceManager.categories.Sounds, false, 'bool',
   'If true, terminal bells in the background will create a Web ' +
   'Notification. https://www.w3.org/TR/notifications/\n' +
   '\n'+
   'Displaying notifications requires permission from the user. When this ' +
   'option is set to true, hterm will attempt to ask the user for permission ' +
   'if necessary. Note browsers may not show this permission request if it ' +
   'did not originate from a user action.\n' +
   '\n' +
   'Chrome extensions with the "notifications" permission have permission to ' +
   'display notifications.'],

  'background-color':
  [hterm.PreferenceManager.categories.Appearance, 'rgb(16, 16, 16)', 'color',
   'The background color for text with no other color attributes.'],

  'background-image':
  [hterm.PreferenceManager.categories.Appearance, '', 'string',
   'CSS value of the background image.  Empty string for no image.\n' +
   '\n' +
   'For example:\n' +
   '  url(https://goo.gl/anedTK)\n' +
   '  linear-gradient(top bottom, blue, red)'],

  'background-size':
  [hterm.PreferenceManager.categories.Appearance, '', 'string',
   'CSS value of the background image size.  Defaults to none.'],

  'background-position':
  [hterm.PreferenceManager.categories.Appearance, '', 'string',
   'CSS value of the background image position.\n' +
   '\n' +
   'For example:\n' +
   '  10% 10%\n' +
   '  center'],

  'backspace-sends-backspace':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'If true, the backspace should send BS (\'\\x08\', aka ^H).  Otherwise ' +
   'the backspace key should send \'\\x7f\'.'],

  'character-map-overrides':
  [hterm.PreferenceManager.categories.Appearance, null, 'value',
    'This is specified as an object. It is a sparse array, where each '  +
    'property is the character set code and the value is an object that is ' +
    'a sparse array itself. In that sparse array, each property is the ' +
    'received character and the value is the displayed character.\n' +
    '\n' +
    'For example:\n' +
    '  {"0":{"+":"\\u2192",",":"\\u2190","-":"\\u2191",".":"\\u2193", ' +
    '"0":"\\u2588"}}'
  ],

  'close-on-exit':
  [hterm.PreferenceManager.categories.Miscellaneous, true, 'bool',
   'Whether or not to close the window when the command exits.'],

  'cursor-blink':
  [hterm.PreferenceManager.categories.Appearance, false, 'bool',
   'Whether or not to blink the cursor by default.'],

  'cursor-blink-cycle':
  [hterm.PreferenceManager.categories.Appearance, [1000, 500], 'value',
   'The cursor blink rate in milliseconds.\n' +
   '\n' +
   'A two element array, the first of which is how long the cursor should be ' +
   'on, second is how long it should be off.'],

  'cursor-color':
  [hterm.PreferenceManager.categories.Appearance, 'rgba(255, 0, 0, 0.5)',
   'color',
   'The color of the visible cursor.'],

  'color-palette-overrides':
  [hterm.PreferenceManager.categories.Appearance, null, 'value',
   'Override colors in the default palette.\n' +
   '\n' +
   'This can be specified as an array or an object.  If specified as an ' +
   'object it is assumed to be a sparse array, where each property ' +
   'is a numeric index into the color palette.\n' +
   '\n' +
   'Values can be specified as almost any css color value.  This ' +
   'includes #RGB, #RRGGBB, rgb(...), rgba(...), and any color names ' +
   'that are also part of the stock X11 rgb.txt file.\n' +
   '\n' +
   'You can use \'null\' to specify that the default value should be not ' +
   'be changed.  This is useful for skipping a small number of indices ' +
   'when the value is specified as an array.'],

  'copy-on-select':
  [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
   'Automatically copy mouse selection to the clipboard.'],

  'use-default-window-copy':
  [hterm.PreferenceManager.categories.CopyPaste, false, 'bool',
   'Whether to use the default window copy behavior'],

  'clear-selection-after-copy':
  [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
   'Whether to clear the selection after copying.'],

  'ctrl-plus-minus-zero-zoom':
  [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
   'If true, Ctrl-Plus/Minus/Zero controls zoom.\n' +
   'If false, Ctrl-Shift-Plus/Minus/Zero controls zoom, Ctrl-Minus sends ^_, ' +
   'Ctrl-Plus/Zero do nothing.'],

  'ctrl-c-copy':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'Ctrl+C copies if true, send ^C to host if false.\n' +
   'Ctrl+Shift+C sends ^C to host if true, copies if false.'],

  'ctrl-v-paste':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'Ctrl+V pastes if true, send ^V to host if false.\n' +
   'Ctrl+Shift+V sends ^V to host if true, pastes if false.'],

  'east-asian-ambiguous-as-two-column':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'Set whether East Asian Ambiguous characters have two column width.'],

  'enable-8-bit-control':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'True to enable 8-bit control characters, false to ignore them.\n' +
   '\n' +
   'We\'ll respect the two-byte versions of these control characters ' +
   'regardless of this setting.'],

  'enable-bold':
  [hterm.PreferenceManager.categories.Appearance, null, 'tristate',
   'True if we should use bold weight font for text with the bold/bright ' +
   'attribute.  False to use the normal weight font.  Null to autodetect.'],

  'enable-bold-as-bright':
  [hterm.PreferenceManager.categories.Appearance, true, 'bool',
   'True if we should use bright colors (8-15 on a 16 color palette) ' +
   'for any text with the bold attribute.  False otherwise.'],

  'enable-blink':
  [hterm.PreferenceManager.categories.Appearance, true, 'bool',
   'True if we should respect the blink attribute.  False to ignore it.  '],

  'enable-clipboard-notice':
  [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
   'Show a message in the terminal when the host writes to the clipboard.'],

  'enable-clipboard-write':
  [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
   'Allow the host to write directly to the system clipboard.'],

  'enable-dec12':
  [hterm.PreferenceManager.categories.Miscellaneous, false, 'bool',
   'Respect the host\'s attempt to change the cursor blink status using ' +
   'DEC Private Mode 12.'],

  'environment':
  [hterm.PreferenceManager.categories.Miscellaneous, {'TERM': 'xterm-256color'},
   'value',
   'The default environment variables, as an object.'],

  'font-family':
  [hterm.PreferenceManager.categories.Appearance,
   '"DejaVu Sans Mono", "Everson Mono", FreeMono, "Menlo", "Terminal", ' +
   'monospace', 'string',
   'Default font family for the terminal text.'],

  'font-size':
  [hterm.PreferenceManager.categories.Appearance, 15, 'int',
   'The default font size in pixels.'],

  'font-smoothing':
  [hterm.PreferenceManager.categories.Appearance, 'antialiased', 'string',
   'CSS font-smoothing property.'],

  'foreground-color':
  [hterm.PreferenceManager.categories.Appearance, 'rgb(240, 240, 240)', 'color',
   'The foreground color for text with no other color attributes.'],

  'home-keys-scroll':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'If true, home/end will control the terminal scrollbar and shift home/end ' +
   'will send the VT keycodes.  If false then home/end sends VT codes and ' +
   'shift home/end scrolls.'],

  'keybindings':
  [hterm.PreferenceManager.categories.Keyboard, null, 'value',
   'A map of key sequence to key actions.  Key sequences include zero or ' +
   'more modifier keys followed by a key code.  Key codes can be decimal or ' +
   'hexadecimal numbers, or a key identifier.  Key actions can be specified ' +
   'a string to send to the host, or an action identifier.  For a full ' +
   'list of key code and action identifiers, see https://goo.gl/8AoD09.' +
   '\n' +
   '\n' +
   'Sample keybindings:\n' +
   '{ "Ctrl-Alt-K": "clearScrollback",\n' +
   '  "Ctrl-Shift-L": "PASS",\n' +
   '  "Ctrl-H": "\'HELLO\\n\'"\n' +
   '}'],

  'max-string-sequence':
  [hterm.PreferenceManager.categories.Encoding, 100000, 'int',
   'Max length of a DCS, OSC, PM, or APS sequence before we give up and ' +
   'ignore the code.'],

  'media-keys-are-fkeys':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'If true, convert media keys to their Fkey equivalent. If false, let ' +
   'the browser handle the keys.'],

  'meta-sends-escape':
  [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
   'Set whether the meta key sends a leading escape or not.'],

  'mouse-paste-button':
  [hterm.PreferenceManager.categories.CopyPaste, null,
   [null, 0, 1, 2, 3, 4, 5, 6],
   'Mouse paste button, or null to autodetect.\n' +
   '\n' +
   'For autodetect, we\'ll try to enable middle button paste for non-X11 ' +
   'platforms.  On X11 we move it to button 3.'],

  'page-keys-scroll':
  [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
   'If true, page up/down will control the terminal scrollbar and shift ' +
   'page up/down will send the VT keycodes.  If false then page up/down ' +
   'sends VT codes and shift page up/down scrolls.'],

  'pass-alt-number':
  [hterm.PreferenceManager.categories.Keyboard, null, 'tristate',
   'Set whether we should pass Alt-1..9 to the browser.\n' +
   '\n' +
   'This is handy when running hterm in a browser tab, so that you don\'t ' +
   'lose Chrome\'s "switch to tab" keyboard accelerators.  When not running ' +
   'in a tab it\'s better to send these keys to the host so they can be ' +
   'used in vim or emacs.\n' +
   '\n' +
   'If true, Alt-1..9 will be handled by the browser.  If false, Alt-1..9 ' +
   'will be sent to the host.  If null, autodetect based on browser platform ' +
   'and window type.'],

  'pass-ctrl-number':
  [hterm.PreferenceManager.categories.Keyboard, null, 'tristate',
   'Set whether we should pass Ctrl-1..9 to the browser.\n' +
   '\n' +
   'This is handy when running hterm in a browser tab, so that you don\'t ' +
   'lose Chrome\'s "switch to tab" keyboard accelerators.  When not running ' +
   'in a tab it\'s better to send these keys to the host so they can be ' +
   'used in vim or emacs.\n' +
   '\n' +
   'If true, Ctrl-1..9 will be handled by the browser.  If false, Ctrl-1..9 ' +
   'will be sent to the host.  If null, autodetect based on browser platform ' +
   'and window type.'],

   'pass-meta-number':
  [hterm.PreferenceManager.categories.Keyboard, null, 'tristate',
   'Set whether we should pass Meta-1..9 to the browser.\n' +
   '\n' +
   'This is handy when running hterm in a browser tab, so that you don\'t ' +
   'lose Chrome\'s "switch to tab" keyboard accelerators.  When not running ' +
   'in a tab it\'s better to send these keys to the host so they can be ' +
   'used in vim or emacs.\n' +
   '\n' +
   'If true, Meta-1..9 will be handled by the browser.  If false, Meta-1..9 ' +
   'will be sent to the host.  If null, autodetect based on browser platform ' +
   'and window type.'],

  'pass-meta-v':
  [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
   'Set whether meta-V gets passed to host.'],

  'receive-encoding':
  [hterm.PreferenceManager.categories.Encoding, 'utf-8', ['utf-8', 'raw'],
   'Set the expected encoding for data received from the host.\n' +
   '\n' +
   'Valid values are \'utf-8\' and \'raw\'.'],

  'scroll-on-keystroke':
  [hterm.PreferenceManager.categories.Scrolling, true, 'bool',
   'If true, scroll to the bottom on any keystroke.'],

  'scroll-on-output':
  [hterm.PreferenceManager.categories.Scrolling, false, 'bool',
   'If true, scroll to the bottom on terminal output.'],

  'scrollbar-visible':
  [hterm.PreferenceManager.categories.Scrolling, true, 'bool',
   'The vertical scrollbar mode.'],

  'scroll-wheel-move-multiplier':
  [hterm.PreferenceManager.categories.Scrolling, 1, 'int',
   'The multiplier for the pixel delta in mousewheel event caused by the ' +
   'scroll wheel. Alters how fast the page scrolls.'],

  'send-encoding':
  [hterm.PreferenceManager.categories.Encoding, 'utf-8', ['utf-8', 'raw'],
   'Set the encoding for data sent to host.'],

  'shift-insert-paste':
  [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
   'Shift + Insert pastes if true, sent to host if false.'],

  'user-css':
  [hterm.PreferenceManager.categories.Appearance, '', 'url',
   'URL of user stylesheet to include in the terminal document.']
};

hterm.PreferenceManager.prototype = {
  __proto__: lib.PreferenceManager.prototype
};
// SOURCE FILE: hterm/js/hterm_pubsub.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

/**
 * Utility class used to add publish/subscribe/unsubscribe functionality to
 * an existing object.
 */
hterm.PubSub = function() {
  this.observers_ = {};
};

/**
 * Add publish, subscribe, and unsubscribe methods to an existing object.
 *
 * No other properties of the object are touched, so there is no need to
 * worry about clashing private properties.
 *
 * @param {Object} obj The object to add this behavior to.
 */
hterm.PubSub.addBehavior = function(obj) {
  var pubsub = new hterm.PubSub();
  for (var m in hterm.PubSub.prototype) {
    obj[m] = hterm.PubSub.prototype[m].bind(pubsub);
  }
};

/**
 * Subscribe to be notified of messages about a subject.
 *
 * @param {string} subject The subject to subscribe to.
 * @param {function(Object)} callback The function to invoke for notifications.
 */
hterm.PubSub.prototype.subscribe = function(subject, callback) {
  if (!(subject in this.observers_))
    this.observers_[subject] = [];

  this.observers_[subject].push(callback);
};

/**
 * Unsubscribe from a subject.
 *
 * @param {string} subject The subject to unsubscribe from.
 * @param {function(Object)} callback A callback previously registered via
 *     subscribe().
 */
hterm.PubSub.prototype.unsubscribe = function(subject, callback) {
  var list = this.observers_[subject];
  if (!list)
    throw 'Invalid subject: ' + subject;

  var i = list.indexOf(callback);
  if (i < 0)
    throw 'Not subscribed: ' + subject;

  list.splice(i, 1);
};

/**
 * Publish a message about a subject.
 *
 * Subscribers (and the optional final callback) are invoked asynchronously.
 * This method will return before anyone is actually notified.
 *
 * @param {string} subject The subject to publish about.
 * @param {Object} e An arbitrary object associated with this notification.
 * @param {function(Object)} opt_lastCallback An optional function to call after
 *     all subscribers have been notified.
 */
hterm.PubSub.prototype.publish = function(subject, e, opt_lastCallback) {
  function notifyList(i) {
    // Set this timeout before invoking the callback, so we don't have to
    // concern ourselves with exceptions.
    if (i < list.length - 1)
      setTimeout(notifyList, 0, i + 1);

    list[i](e);
  }

  var list = this.observers_[subject];
  if (list) {
    // Copy the list, in case it changes while we're notifying.
    list = [].concat(list);
  }

  if (opt_lastCallback) {
    if (list) {
      list.push(opt_lastCallback);
    } else {
      list = [opt_lastCallback];
    }
  }

  if (list)
    setTimeout(notifyList, 0, 0);
};
// SOURCE FILE: hterm/js/hterm_screen.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.f', 'lib.wc',
          'hterm.RowCol', 'hterm.Size', 'hterm.TextAttributes');

/**
 * @fileoverview This class represents a single terminal screen full of text.
 *
 * It maintains the current cursor position and has basic methods for text
 * insert and overwrite, and adding or removing rows from the screen.
 *
 * This class has no knowledge of the scrollback buffer.
 *
 * The number of rows on the screen is determined only by the number of rows
 * that the caller inserts into the screen.  If a caller wants to ensure a
 * constant number of rows on the screen, it's their responsibility to remove a
 * row for each row inserted.
 *
 * The screen width, in contrast, is enforced locally.
 *
 *
 * In practice...
 * - The hterm.Terminal class holds two hterm.Screen instances.  One for the
 * primary screen and one for the alternate screen.
 *
 * - The html.Screen class only cares that rows are HTMLElements.  In the
 * larger context of hterm, however, the rows happen to be displayed by an
 * hterm.ScrollPort and have to follow a few rules as a result.  Each
 * row must be rooted by the custom HTML tag 'x-row', and each must have a
 * rowIndex property that corresponds to the index of the row in the context
 * of the scrollback buffer.  These invariants are enforced by hterm.Terminal
 * because that is the class using the hterm.Screen in the context of an
 * hterm.ScrollPort.
 */

/**
 * Create a new screen instance.
 *
 * The screen initially has no rows and a maximum column count of 0.
 *
 * @param {integer} opt_columnCount The maximum number of columns for this
 *    screen.  See insertString() and overwriteString() for information about
 *    what happens when too many characters are added too a row.  Defaults to
 *    0 if not provided.
 */
hterm.Screen = function(opt_columnCount) {
  /**
   * Public, read-only access to the rows in this screen.
   */
  this.rowsArray = [];

  // The max column width for this screen.
  this.columnCount_ = opt_columnCount || 80;

  // The current color, bold, underline and blink attributes.
  this.textAttributes = new hterm.TextAttributes(window.document);

  // Current zero-based cursor coordinates.
  this.cursorPosition = new hterm.RowCol(0, 0);

  // The node containing the row that the cursor is positioned on.
  this.cursorRowNode_ = null;

  // The node containing the span of text that the cursor is positioned on.
  this.cursorNode_ = null;

  // The offset in column width into cursorNode_ where the cursor is positioned.
  this.cursorOffset_ = null;
};

/**
 * Return the screen size as an hterm.Size object.
 *
 * @return {hterm.Size} hterm.Size object representing the current number
 *     of rows and columns in this screen.
 */
hterm.Screen.prototype.getSize = function() {
  return new hterm.Size(this.columnCount_, this.rowsArray.length);
};

/**
 * Return the current number of rows in this screen.
 *
 * @return {integer} The number of rows in this screen.
 */
hterm.Screen.prototype.getHeight = function() {
  return this.rowsArray.length;
};

/**
 * Return the current number of columns in this screen.
 *
 * @return {integer} The number of columns in this screen.
 */
hterm.Screen.prototype.getWidth = function() {
  return this.columnCount_;
};

/**
 * Set the maximum number of columns per row.
 *
 * @param {integer} count The maximum number of columns per row.
 */
hterm.Screen.prototype.setColumnCount = function(count) {
  this.columnCount_ = count;

  if (this.cursorPosition.column >= count)
    this.setCursorPosition(this.cursorPosition.row, count - 1);
};

/**
 * Remove the first row from the screen and return it.
 *
 * @return {HTMLElement} The first row in this screen.
 */
hterm.Screen.prototype.shiftRow = function() {
  return this.shiftRows(1)[0];
};

/**
 * Remove rows from the top of the screen and return them as an array.
 *
 * @param {integer} count The number of rows to remove.
 * @return {Array.<HTMLElement>} The selected rows.
 */
hterm.Screen.prototype.shiftRows = function(count) {
  return this.rowsArray.splice(0, count);
};

/**
 * Insert a row at the top of the screen.
 *
 * @param {HTMLElement} row The row to insert.
 */
hterm.Screen.prototype.unshiftRow = function(row) {
  this.rowsArray.splice(0, 0, row);
};

/**
 * Insert rows at the top of the screen.
 *
 * @param {Array.<HTMLElement>} rows The rows to insert.
 */
hterm.Screen.prototype.unshiftRows = function(rows) {
  this.rowsArray.unshift.apply(this.rowsArray, rows);
};

/**
 * Remove the last row from the screen and return it.
 *
 * @return {HTMLElement} The last row in this screen.
 */
hterm.Screen.prototype.popRow = function() {
  return this.popRows(1)[0];
};

/**
 * Remove rows from the bottom of the screen and return them as an array.
 *
 * @param {integer} count The number of rows to remove.
 * @return {Array.<HTMLElement>} The selected rows.
 */
hterm.Screen.prototype.popRows = function(count) {
  return this.rowsArray.splice(this.rowsArray.length - count, count);
};

/**
 * Insert a row at the bottom of the screen.
 *
 * @param {HTMLElement} row The row to insert.
 */
hterm.Screen.prototype.pushRow = function(row) {
  this.rowsArray.push(row);
};

/**
 * Insert rows at the bottom of the screen.
 *
 * @param {Array.<HTMLElement>} rows The rows to insert.
 */
hterm.Screen.prototype.pushRows = function(rows) {
  rows.push.apply(this.rowsArray, rows);
};

/**
 * Insert a row at the specified row of the screen.
 *
 * @param {integer} index The index to insert the row.
 * @param {HTMLElement} row The row to insert.
 */
hterm.Screen.prototype.insertRow = function(index, row) {
  this.rowsArray.splice(index, 0, row);
};

/**
 * Insert rows at the specified row of the screen.
 *
 * @param {integer} index The index to insert the rows.
 * @param {Array.<HTMLElement>} rows The rows to insert.
 */
hterm.Screen.prototype.insertRows = function(index, rows) {
  for (var i = 0; i < rows.length; i++) {
    this.rowsArray.splice(index + i, 0, rows[i]);
  }
};

/**
 * Remove a row from the screen and return it.
 *
 * @param {integer} index The index of the row to remove.
 * @return {HTMLElement} The selected row.
 */
hterm.Screen.prototype.removeRow = function(index) {
  return this.rowsArray.splice(index, 1)[0];
};

/**
 * Remove rows from the bottom of the screen and return them as an array.
 *
 * @param {integer} index The index to start removing rows.
 * @param {integer} count The number of rows to remove.
 * @return {Array.<HTMLElement>} The selected rows.
 */
hterm.Screen.prototype.removeRows = function(index, count) {
  return this.rowsArray.splice(index, count);
};

/**
 * Invalidate the current cursor position.
 *
 * This sets this.cursorPosition to (0, 0) and clears out some internal
 * data.
 *
 * Attempting to insert or overwrite text while the cursor position is invalid
 * will raise an obscure exception.
 */
hterm.Screen.prototype.invalidateCursorPosition = function() {
  this.cursorPosition.move(0, 0);
  this.cursorRowNode_ = null;
  this.cursorNode_ = null;
  this.cursorOffset_ = null;
};

/**
 * Clear the contents of the cursor row.
 */
hterm.Screen.prototype.clearCursorRow = function() {
  this.cursorRowNode_.innerHTML = '';
  this.cursorRowNode_.removeAttribute('line-overflow');
  this.cursorOffset_ = 0;
  this.cursorPosition.column = 0;
  this.cursorPosition.overflow = false;

  var text;
  if (this.textAttributes.isDefault()) {
    text = '';
  } else {
    text = lib.f.getWhitespace(this.columnCount_);
  }

  // We shouldn't honor inverse colors when clearing an area, to match
  // xterm's back color erase behavior.
  var inverse = this.textAttributes.inverse;
  this.textAttributes.inverse = false;
  this.textAttributes.syncColors();

  var node = this.textAttributes.createContainer(text);
  this.cursorRowNode_.appendChild(node);
  this.cursorNode_ = node;

  this.textAttributes.inverse = inverse;
  this.textAttributes.syncColors();
};

/**
 * Mark the current row as having overflowed to the next line.
 *
 * The line overflow state is used when converting a range of rows into text.
 * It makes it possible to recombine two or more overflow terminal rows into
 * a single line.
 *
 * This is distinct from the cursor being in the overflow state.  Cursor
 * overflow indicates that printing at the cursor position will commit a
 * line overflow, unless it is preceded by a repositioning of the cursor
 * to a non-overflow state.
 */
hterm.Screen.prototype.commitLineOverflow = function() {
  this.cursorRowNode_.setAttribute('line-overflow', true);
};

/**
 * Relocate the cursor to a give row and column.
 *
 * @param {integer} row The zero based row.
 * @param {integer} column The zero based column.
 */
hterm.Screen.prototype.setCursorPosition = function(row, column) {
  if (!this.rowsArray.length) {
    console.warn('Attempt to set cursor position on empty screen.');
    return;
  }

  if (row >= this.rowsArray.length) {
    console.error('Row out of bounds: ' + row);
    row = this.rowsArray.length - 1;
  } else if (row < 0) {
    console.error('Row out of bounds: ' + row);
    row = 0;
  }

  if (column >= this.columnCount_) {
    console.error('Column out of bounds: ' + column);
    column = this.columnCount_ - 1;
  } else if (column < 0) {
    console.error('Column out of bounds: ' + column);
    column = 0;
  }

  this.cursorPosition.overflow = false;

  var rowNode = this.rowsArray[row];
  var node = rowNode.firstChild;

  if (!node) {
    node = rowNode.ownerDocument.createTextNode('');
    rowNode.appendChild(node);
  }

  var currentColumn = 0;

  if (rowNode == this.cursorRowNode_) {
    if (column >= this.cursorPosition.column - this.cursorOffset_) {
      node = this.cursorNode_;
      currentColumn = this.cursorPosition.column - this.cursorOffset_;
    }
  } else {
    this.cursorRowNode_ = rowNode;
  }

  this.cursorPosition.move(row, column);

  while (node) {
    var offset = column - currentColumn;
    var width = hterm.TextAttributes.nodeWidth(node);
    if (!node.nextSibling || width > offset) {
      this.cursorNode_ = node;
      this.cursorOffset_ = offset;
      return;
    }

    currentColumn += width;
    node = node.nextSibling;
  }
};

/**
 * Set the provided selection object to be a caret selection at the current
 * cursor position.
 */
hterm.Screen.prototype.syncSelectionCaret = function(selection) {
  try {
    selection.collapse(this.cursorNode_, this.cursorOffset_);
  } catch (firefoxIgnoredException) {
    // FF can throw an exception if the range is off, rather than just not
    // performing the collapse.
  }
};

/**
 * Split a single node into two nodes at the given offset.
 *
 * For example:
 * Given the DOM fragment '<div><span>Hello World</span></div>', call splitNode_
 * passing the span and an offset of 6.  This would modify the fragment to
 * become: '<div><span>Hello </span><span>World</span></div>'.  If the span
 * had any attributes they would have been copied to the new span as well.
 *
 * The to-be-split node must have a container, so that the new node can be
 * placed next to it.
 *
 * @param {HTMLNode} node The node to split.
 * @param {integer} offset The offset into the node where the split should
 *     occur.
 */
hterm.Screen.prototype.splitNode_ = function(node, offset) {
  var afterNode = node.cloneNode(false);

  var textContent = node.textContent;
  node.textContent = hterm.TextAttributes.nodeSubstr(node, 0, offset);
  afterNode.textContent = lib.wc.substr(textContent, offset);

  if (afterNode.textContent)
    node.parentNode.insertBefore(afterNode, node.nextSibling);
  if (!node.textContent)
    node.parentNode.removeChild(node);
};

/**
 * Ensure that text is clipped and the cursor is clamped to the column count.
 */
hterm.Screen.prototype.maybeClipCurrentRow = function() {
  var width = hterm.TextAttributes.nodeWidth(this.cursorRowNode_);

  if (width <= this.columnCount_) {
    // Current row does not need clipping, but may need clamping.
    if (this.cursorPosition.column >= this.columnCount_) {
      this.setCursorPosition(this.cursorPosition.row, this.columnCount_ - 1);
      this.cursorPosition.overflow = true;
    }

    return;
  }

  // Save off the current column so we can maybe restore it later.
  var currentColumn = this.cursorPosition.column;

  // Move the cursor to the final column.
  this.setCursorPosition(this.cursorPosition.row, this.columnCount_ - 1);

  // Remove any text that partially overflows.
  width = hterm.TextAttributes.nodeWidth(this.cursorNode_);

  if (this.cursorOffset_ < width - 1) {
    this.cursorNode_.textContent = hterm.TextAttributes.nodeSubstr(
        this.cursorNode_, 0, this.cursorOffset_ + 1);
  }

  // Remove all nodes after the cursor.
  var rowNode = this.cursorRowNode_;
  var node = this.cursorNode_.nextSibling;

  while (node) {
    rowNode.removeChild(node);
    node = this.cursorNode_.nextSibling;
  }

  if (currentColumn < this.columnCount_) {
    // If the cursor was within the screen before we started then restore its
    // position.
    this.setCursorPosition(this.cursorPosition.row, currentColumn);
  } else {
    // Otherwise leave it at the the last column in the overflow state.
    this.cursorPosition.overflow = true;
  }
};

/**
 * Insert a string at the current character position using the current
 * text attributes.
 *
 * You must call maybeClipCurrentRow() after in order to clip overflowed
 * text and clamp the cursor.
 *
 * It is also up to the caller to properly maintain the line overflow state
 * using hterm.Screen..commitLineOverflow().
 */
hterm.Screen.prototype.insertString = function(str) {
  var cursorNode = this.cursorNode_;
  var cursorNodeText = cursorNode.textContent;

  this.cursorRowNode_.removeAttribute('line-overflow');

  // We may alter the width of the string by prepending some missing
  // whitespaces, so we need to record the string width ahead of time.
  var strWidth = lib.wc.strWidth(str);

  // No matter what, before this function exits the cursor column will have
  // moved this much.
  this.cursorPosition.column += strWidth;

  // Local cache of the cursor offset.
  var offset = this.cursorOffset_;

  // Reverse offset is the offset measured from the end of the string.
  // Zero implies that the cursor is at the end of the cursor node.
  var reverseOffset = hterm.TextAttributes.nodeWidth(cursorNode) - offset;

  if (reverseOffset < 0) {
    // A negative reverse offset means the cursor is positioned past the end
    // of the characters on this line.  We'll need to insert the missing
    // whitespace.
    var ws = lib.f.getWhitespace(-reverseOffset);

    // This whitespace should be completely unstyled.  Underline, background
    // color, and strikethrough would be visible on whitespace, so we can't use
    // one of those spans to hold the text.
    if (!(this.textAttributes.underline ||
          this.textAttributes.strikethrough ||
          this.textAttributes.background ||
          this.textAttributes.wcNode ||
          this.textAttributes.tileData != null)) {
      // Best case scenario, we can just pretend the spaces were part of the
      // original string.
      str = ws + str;
    } else if (cursorNode.nodeType == 3 ||
               !(cursorNode.wcNode ||
                 cursorNode.tileNode ||
                 cursorNode.style.textDecoration ||
                 cursorNode.style.backgroundColor)) {
      // Second best case, the current node is able to hold the whitespace.
      cursorNode.textContent = (cursorNodeText += ws);
    } else {
      // Worst case, we have to create a new node to hold the whitespace.
      var wsNode = cursorNode.ownerDocument.createTextNode(ws);
      this.cursorRowNode_.insertBefore(wsNode, cursorNode.nextSibling);
      this.cursorNode_ = cursorNode = wsNode;
      this.cursorOffset_ = offset = -reverseOffset;
      cursorNodeText = ws;
    }

    // We now know for sure that we're at the last character of the cursor node.
    reverseOffset = 0;
  }

  if (this.textAttributes.matchesContainer(cursorNode)) {
    // The new text can be placed directly in the cursor node.
    if (reverseOffset == 0) {
      cursorNode.textContent = cursorNodeText + str;
    } else if (offset == 0) {
      cursorNode.textContent = str + cursorNodeText;
    } else {
      cursorNode.textContent =
          hterm.TextAttributes.nodeSubstr(cursorNode, 0, offset) +
          str + hterm.TextAttributes.nodeSubstr(cursorNode, offset);
    }

    this.cursorOffset_ += strWidth;
    return;
  }

  // The cursor node is the wrong style for the new text.  If we're at the
  // beginning or end of the cursor node, then the adjacent node is also a
  // potential candidate.

  if (offset == 0) {
    // At the beginning of the cursor node, the check the previous sibling.
    var previousSibling = cursorNode.previousSibling;
    if (previousSibling &&
        this.textAttributes.matchesContainer(previousSibling)) {
      previousSibling.textContent += str;
      this.cursorNode_ = previousSibling;
      this.cursorOffset_ = lib.wc.strWidth(previousSibling.textContent);
      return;
    }

    var newNode = this.textAttributes.createContainer(str);
    this.cursorRowNode_.insertBefore(newNode, cursorNode);
    this.cursorNode_ = newNode;
    this.cursorOffset_ = strWidth;
    return;
  }

  if (reverseOffset == 0) {
    // At the end of the cursor node, the check the next sibling.
    var nextSibling = cursorNode.nextSibling;
    if (nextSibling &&
        this.textAttributes.matchesContainer(nextSibling)) {
      nextSibling.textContent = str + nextSibling.textContent;
      this.cursorNode_ = nextSibling;
      this.cursorOffset_ = lib.wc.strWidth(str);
      return;
    }

    var newNode = this.textAttributes.createContainer(str);
    this.cursorRowNode_.insertBefore(newNode, nextSibling);
    this.cursorNode_ = newNode;
    // We specifically need to include any missing whitespace here, since it's
    // going in a new node.
    this.cursorOffset_ = hterm.TextAttributes.nodeWidth(newNode);
    return;
  }

  // Worst case, we're somewhere in the middle of the cursor node.  We'll
  // have to split it into two nodes and insert our new container in between.
  this.splitNode_(cursorNode, offset);
  var newNode = this.textAttributes.createContainer(str);
  this.cursorRowNode_.insertBefore(newNode, cursorNode.nextSibling);
  this.cursorNode_ = newNode;
  this.cursorOffset_ = strWidth;
};

/**
 * Overwrite the text at the current cursor position.
 *
 * You must call maybeClipCurrentRow() after in order to clip overflowed
 * text and clamp the cursor.
 *
 * It is also up to the caller to properly maintain the line overflow state
 * using hterm.Screen..commitLineOverflow().
 */
hterm.Screen.prototype.overwriteString = function(str) {
  var maxLength = this.columnCount_ - this.cursorPosition.column;
  if (!maxLength)
    return [str];

  var width = lib.wc.strWidth(str);
  if (this.textAttributes.matchesContainer(this.cursorNode_) &&
      this.cursorNode_.textContent.substr(this.cursorOffset_) == str) {
    // This overwrite would be a no-op, just move the cursor and return.
    this.cursorOffset_ += width;
    this.cursorPosition.column += width;
    return;
  }

  this.deleteChars(Math.min(width, maxLength));
  this.insertString(str);
};

/**
 * Forward-delete one or more characters at the current cursor position.
 *
 * Text to the right of the deleted characters is shifted left.  Only affects
 * characters on the same row as the cursor.
 *
 * @param {integer} count The column width of characters to delete.  This is
 *     clamped to the column width minus the cursor column.
 * @return {integer} The column width of the characters actually deleted.
 */
hterm.Screen.prototype.deleteChars = function(count) {
  var node = this.cursorNode_;
  var offset = this.cursorOffset_;

  var currentCursorColumn = this.cursorPosition.column;
  count = Math.min(count, this.columnCount_ - currentCursorColumn);
  if (!count)
    return 0;

  var rv = count;
  var startLength, endLength;

  while (node && count) {
    startLength = hterm.TextAttributes.nodeWidth(node);
    node.textContent = hterm.TextAttributes.nodeSubstr(node, 0, offset) +
        hterm.TextAttributes.nodeSubstr(node, offset + count);
    endLength = hterm.TextAttributes.nodeWidth(node);
    count -= startLength - endLength;
    if (offset < startLength && endLength && startLength == endLength) {
      // No characters were deleted when there should be.  We're probably trying
      // to delete one column width from a wide character node.  We remove the
      // wide character node here and replace it with a single space.
      var spaceNode = this.textAttributes.createContainer(' ');
      node.parentNode.insertBefore(spaceNode, node.nextSibling);
      node.textContent = '';
      endLength = 0;
      count -= 1;
    }

    var nextNode = node.nextSibling;
    if (endLength == 0 && node != this.cursorNode_) {
      node.parentNode.removeChild(node);
    }
    node = nextNode;
    offset = 0;
  }

  // Remove this.cursorNode_ if it is an empty non-text node.
  if (this.cursorNode_.nodeType != 3 && !this.cursorNode_.textContent) {
    var cursorNode = this.cursorNode_;
    if (cursorNode.previousSibling) {
      this.cursorNode_ = cursorNode.previousSibling;
      this.cursorOffset_ = hterm.TextAttributes.nodeWidth(
          cursorNode.previousSibling);
    } else if (cursorNode.nextSibling) {
      this.cursorNode_ = cursorNode.nextSibling;
      this.cursorOffset_ = 0;
    } else {
      var emptyNode = this.cursorRowNode_.ownerDocument.createTextNode('');
      this.cursorRowNode_.appendChild(emptyNode);
      this.cursorNode_ = emptyNode;
      this.cursorOffset_ = 0;
    }
    this.cursorRowNode_.removeChild(cursorNode);
  }

  return rv;
};

/**
 * Finds first X-ROW of a line containing specified X-ROW.
 * Used to support line overflow.
 *
 * @param {Node} row X-ROW to begin search for first row of line.
 * @return {Node} The X-ROW that is at the beginning of the line.
 **/
hterm.Screen.prototype.getLineStartRow_ = function(row) {
  while (row.previousSibling &&
         row.previousSibling.hasAttribute('line-overflow')) {
    row = row.previousSibling;
  }
  return row;
};

/**
 * Gets text of a line beginning with row.
 * Supports line overflow.
 *
 * @param {Node} row First X-ROW of line.
 * @return {string} Text content of line.
 **/
hterm.Screen.prototype.getLineText_ = function(row) {
  var rowText = "";
  while (row) {
    rowText += row.textContent;
    if (row.hasAttribute('line-overflow')) {
      row = row.nextSibling;
    } else {
      break;
    }
  }
  return rowText;
};

/**
 * Returns X-ROW that is ancestor of the node.
 *
 * @param {Node} node Node to get X-ROW ancestor for.
 * @return {Node} X-ROW ancestor of node, or null if not found.
 **/
hterm.Screen.prototype.getXRowAncestor_ = function(node) {
  while (node) {
    if (node.nodeName === 'X-ROW')
      break;
    node = node.parentNode;
  }
  return node;
};

/**
 * Returns position within line of character at offset within node.
 * Supports line overflow.
 *
 * @param {Node} row X-ROW at beginning of line.
 * @param {Node} node Node to get position of.
 * @param {integer} offset Offset into node.
 *
 * @return {integer} Position within line of character at offset within node.
 **/
hterm.Screen.prototype.getPositionWithOverflow_ = function(row, node, offset) {
  if (!node)
    return -1;
  var ancestorRow = this.getXRowAncestor_(node);
  if (!ancestorRow)
    return -1;
  var position = 0;
  while (ancestorRow != row) {
    position += hterm.TextAttributes.nodeWidth(row);
    if (row.hasAttribute('line-overflow') && row.nextSibling) {
      row = row.nextSibling;
    } else {
      return -1;
    }
  }
  return position + this.getPositionWithinRow_(row, node, offset);
};

/**
 * Returns position within row of character at offset within node.
 * Does not support line overflow.
 *
 * @param {Node} row X-ROW to get position within.
 * @param {Node} node Node to get position for.
 * @param {integer} offset Offset within node to get position for.
 * @return {integer} Position within row of character at offset within node.
 **/
hterm.Screen.prototype.getPositionWithinRow_ = function(row, node, offset) {
  if (node.parentNode != row) {
    return this.getPositionWithinRow_(node.parentNode, node, offset) +
           this.getPositionWithinRow_(row, node.parentNode, 0);
  }
  var position = 0;
  for (var i = 0; i < row.childNodes.length; i++) {
    var currentNode = row.childNodes[i];
    if (currentNode == node)
      return position + offset;
    position += hterm.TextAttributes.nodeWidth(currentNode);
  }
  return -1;
};

/**
 * Returns the node and offset corresponding to position within line.
 * Supports line overflow.
 *
 * @param {Node} row X-ROW at beginning of line.
 * @param {integer} position Position within line to retrieve node and offset.
 * @return {Array} Two element array containing node and offset respectively.
 **/
hterm.Screen.prototype.getNodeAndOffsetWithOverflow_ = function(row, position) {
  while (row && position > hterm.TextAttributes.nodeWidth(row)) {
    if (row.hasAttribute('line-overflow') && row.nextSibling) {
      position -= hterm.TextAttributes.nodeWidth(row);
      row = row.nextSibling;
    } else {
      return -1;
    }
  }
  return this.getNodeAndOffsetWithinRow_(row, position);
};

/**
 * Returns the node and offset corresponding to position within row.
 * Does not support line overflow.
 *
 * @param {Node} row X-ROW to get position within.
 * @param {integer} position Position within row to retrieve node and offset.
 * @return {Array} Two element array containing node and offset respectively.
 **/
hterm.Screen.prototype.getNodeAndOffsetWithinRow_ = function(row, position) {
  for (var i = 0; i < row.childNodes.length; i++) {
    var node = row.childNodes[i];
    var nodeTextWidth = hterm.TextAttributes.nodeWidth(node);
    if (position <= nodeTextWidth) {
      if (node.nodeName === 'SPAN') {
        /** Drill down to node contained by SPAN. **/
        return this.getNodeAndOffsetWithinRow_(node, position);
      } else {
        return [node, position];
      }
    }
    position -= nodeTextWidth;
  }
  return null;
};

/**
 * Returns the node and offset corresponding to position within line.
 * Supports line overflow.
 *
 * @param {Node} row X-ROW at beginning of line.
 * @param {integer} start Start position of range within line.
 * @param {integer} end End position of range within line.
 * @param {Range} range Range to modify.
 **/
hterm.Screen.prototype.setRange_ = function(row, start, end, range) {
  var startNodeAndOffset = this.getNodeAndOffsetWithOverflow_(row, start);
  if (startNodeAndOffset == null)
    return;
  var endNodeAndOffset = this.getNodeAndOffsetWithOverflow_(row, end);
  if (endNodeAndOffset == null)
    return;
  range.setStart(startNodeAndOffset[0], startNodeAndOffset[1]);
  range.setEnd(endNodeAndOffset[0], endNodeAndOffset[1]);
};

/**
 * Expands selection to surround URLs.
 *
 * @param {Selection} selection Selection to expand.
 **/
hterm.Screen.prototype.expandSelection = function(selection) {
  if (!selection)
    return;

  var range = selection.getRangeAt(0);
  if (!range || range.toString().match(/\s/))
    return;

  var row = this.getLineStartRow_(this.getXRowAncestor_(range.startContainer));
  if (!row)
    return;

  var startPosition = this.getPositionWithOverflow_(row,
                                                    range.startContainer,
                                                    range.startOffset);
  if (startPosition == -1)
    return;
  var endPosition = this.getPositionWithOverflow_(row,
                                                  range.endContainer,
                                                  range.endOffset);
  if (endPosition == -1)
    return;

  // Matches can start with '~' or '.', since paths frequently do.
  var leftMatch   = '[^\\s\\[\\](){}<>"\'\\^!@#$%&*,;:`]';
  var rightMatch  = '[^\\s\\[\\](){}<>"\'\\^!@#$%&*,;:~.`]';
  var insideMatch = '[^\\s\\[\\](){}<>"\'\\^]*';

  //Move start to the left.
  var rowText = this.getLineText_(row);
  var lineUpToRange = lib.wc.substring(rowText, 0, endPosition);
  var leftRegularExpression = new RegExp(leftMatch + insideMatch + "$");
  var expandedStart = lineUpToRange.search(leftRegularExpression);
  if (expandedStart == -1 || expandedStart > startPosition)
    return;

  //Move end to the right.
  var lineFromRange = lib.wc.substring(rowText, startPosition,
                                       lib.wc.strWidth(rowText));
  var rightRegularExpression = new RegExp("^" + insideMatch + rightMatch);
  var found = lineFromRange.match(rightRegularExpression);
  if (!found)
    return;
  var expandedEnd = startPosition + lib.wc.strWidth(found[0]);
  if (expandedEnd == -1 || expandedEnd < endPosition)
    return;

  this.setRange_(row, expandedStart, expandedEnd, range);
  selection.addRange(range);
};
// SOURCE FILE: hterm/js/hterm_scrollport.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.f', 'hterm.PubSub', 'hterm.Size');

/**
 * A 'viewport' view of fixed-height rows with support for selection and
 * copy-to-clipboard.
 *
 * 'Viewport' in this case means that only the visible rows are in the DOM.
 * If the rowProvider has 100,000 rows, but the ScrollPort is only 25 rows
 * tall, then only 25 dom nodes are created.  The ScrollPort will ask the
 * RowProvider to create new visible rows on demand as they are scrolled in
 * to the visible area.
 *
 * This viewport is designed so that select and copy-to-clipboard still works,
 * even when all or part of the selection is scrolled off screen.
 *
 * Note that the X11 mouse clipboard does not work properly when all or part
 * of the selection is off screen.  It would be difficult to fix this without
 * adding significant overhead to pathologically large selection cases.
 *
 * The RowProvider should return rows rooted by the custom tag name 'x-row'.
 * This ensures that we can quickly assign the correct display height
 * to the rows with css.
 *
 * @param {RowProvider} rowProvider An object capable of providing rows as
 *     raw text or row nodes.
 */
hterm.ScrollPort = function(rowProvider) {
  hterm.PubSub.addBehavior(this);

  this.rowProvider_ = rowProvider;

  // SWAG the character size until we can measure it.
  this.characterSize = new hterm.Size(10, 10);

  // DOM node used for character measurement.
  this.ruler_ = null;

  this.selection = new hterm.ScrollPort.Selection(this);

  // A map of rowIndex => rowNode for each row that is drawn as part of a
  // pending redraw_() call.  Null if there is no pending redraw_ call.
  this.currentRowNodeCache_ = null;

  // A map of rowIndex => rowNode for each row that was drawn as part of the
  // previous redraw_() call.
  this.previousRowNodeCache_ = {};

  // Used during scroll events to detect when the underlying cause is a resize.
  this.lastScreenWidth_ = null;
  this.lastScreenHeight_ = null;

  // True if the user should be allowed to select text in the terminal.
  // This is disabled when the host requests mouse drag events so that we don't
  // end up with two notions of selection.
  this.selectionEnabled_ = true;

  // The last row count returned by the row provider, re-populated during
  // syncScrollHeight().
  this.lastRowCount_ = 0;

  // The scroll wheel pixel delta multiplier to increase/decrease
  // the scroll speed of mouse wheel events. See: https://goo.gl/sXelnq
  this.scrollWheelMultiplier_ = 1;

  /**
   * True if the last scroll caused the scrollport to show the final row.
   */
  this.isScrolledEnd = true;

  // The css rule that we use to control the height of a row.
  this.xrowCssRule_ = null;

  /**
   * A guess at the current scrollbar width, fixed in resize().
   */
  this.currentScrollbarWidthPx = 16;

  /**
   * Whether the ctrl-v key on the screen should paste.
   */
  this.ctrlVPaste = false;

  this.div_ = null;
  this.document_ = null;

  // Collection of active timeout handles.
  this.timeouts_ = {};

  this.observers_ = {};

  this.DEBUG_ = false;
}

/**
 * Proxy for the native selection object which understands how to walk up the
 * DOM to find the containing row node and sort out which comes first.
 *
 * @param {hterm.ScrollPort} scrollPort The parent hterm.ScrollPort instance.
 */
hterm.ScrollPort.Selection = function(scrollPort) {
  this.scrollPort_ = scrollPort;

  /**
   * The row containing the start of the selection.
   *
   * This may be partially or fully selected.  It may be the selection anchor
   * or the focus, but its rowIndex is guaranteed to be less-than-or-equal-to
   * that of the endRow.
   *
   * If only one row is selected then startRow == endRow.  If there is no
   * selection or the selection is collapsed then startRow == null.
   */
  this.startRow = null;

  /**
   * The row containing the end of the selection.
   *
   * This may be partially or fully selected.  It may be the selection anchor
   * or the focus, but its rowIndex is guaranteed to be greater-than-or-equal-to
   * that of the startRow.
   *
   * If only one row is selected then startRow == endRow.  If there is no
   * selection or the selection is collapsed then startRow == null.
   */
  this.endRow = null;

  /**
   * True if startRow != endRow.
   */
  this.isMultiline = null;

  /**
   * True if the selection is just a point rather than a range.
   */
  this.isCollapsed = null;
};

/**
 * Given a list of DOM nodes and a container, return the DOM node that
 * is first according to a depth-first search.
 *
 * Returns null if none of the children are found.
 */
hterm.ScrollPort.Selection.prototype.findFirstChild = function(
    parent, childAry) {
  var node = parent.firstChild;

  while (node) {
    if (childAry.indexOf(node) != -1)
      return node;

    if (node.childNodes.length) {
      var rv = this.findFirstChild(node, childAry);
      if (rv)
        return rv;
    }

    node = node.nextSibling;
  }

  return null;
};

/**
 * Synchronize this object with the current DOM selection.
 *
 * This is a one-way synchronization, the DOM selection is copied to this
 * object, not the other way around.
 */
hterm.ScrollPort.Selection.prototype.sync = function() {
  var self = this;

  // The dom selection object has no way to tell which nodes come first in
  // the document, so we have to figure that out.
  //
  // This function is used when we detect that the "anchor" node is first.
  function anchorFirst() {
    self.startRow = anchorRow;
    self.startNode = selection.anchorNode;
    self.startOffset = selection.anchorOffset;
    self.endRow = focusRow;
    self.endNode = selection.focusNode;
    self.endOffset = selection.focusOffset;
  }

  // This function is used when we detect that the "focus" node is first.
  function focusFirst() {
    self.startRow = focusRow;
    self.startNode = selection.focusNode;
    self.startOffset = selection.focusOffset;
    self.endRow = anchorRow;
    self.endNode = selection.anchorNode;
    self.endOffset = selection.anchorOffset;
  }

  var selection = this.scrollPort_.getDocument().getSelection();

  this.startRow = null;
  this.endRow = null;
  this.isMultiline = null;
  this.isCollapsed = !selection || selection.isCollapsed;

  if (this.isCollapsed)
    return;

  var anchorRow = selection.anchorNode;
  while (anchorRow && !('rowIndex' in anchorRow)) {
    anchorRow = anchorRow.parentNode;
  }

  if (!anchorRow) {
    console.error('Selection anchor is not rooted in a row node: ' +
                  selection.anchorNode.nodeName);
    return;
  }

  var focusRow = selection.focusNode;
  while (focusRow && !('rowIndex' in focusRow)) {
    focusRow = focusRow.parentNode;
  }

  if (!focusRow) {
    console.error('Selection focus is not rooted in a row node: ' +
                  selection.focusNode.nodeName);
    return;
  }

  if (anchorRow.rowIndex < focusRow.rowIndex) {
    anchorFirst();

  } else if (anchorRow.rowIndex > focusRow.rowIndex) {
    focusFirst();

  } else if (selection.focusNode == selection.anchorNode) {
    if (selection.anchorOffset < selection.focusOffset) {
      anchorFirst();
    } else {
      focusFirst();
    }

  } else {
    // The selection starts and ends in the same row, but isn't contained all
    // in a single node.
    var firstNode = this.findFirstChild(
        anchorRow, [selection.anchorNode, selection.focusNode]);

    if (!firstNode)
      throw new Error('Unexpected error syncing selection.');

    if (firstNode == selection.anchorNode) {
      anchorFirst();
    } else {
      focusFirst();
    }
  }

  this.isMultiline = anchorRow.rowIndex != focusRow.rowIndex;
};


/**
 * Turn a div into this hterm.ScrollPort.
 */
hterm.ScrollPort.prototype.decorate = function(div) {
  this.div_ = div;

  this.iframe_ = div.ownerDocument.createElement('iframe');
  this.iframe_.style.cssText = (
      'border: 0;' +
      'height: 100%;' +
      'position: absolute;' +
      'width: 100%');

  // Set the iframe src to # in FF.  Otherwise when the frame's
  // load event fires in FF it clears out the content of the iframe.
  if ('mozInnerScreenX' in window)  // detect a FF only property
    this.iframe_.src = '#';

  div.appendChild(this.iframe_);

  this.iframe_.contentWindow.addEventListener('resize',
                                              this.onResize_.bind(this));

  var doc = this.document_ = this.iframe_.contentDocument;
  doc.body.style.cssText = (
      'margin: 0px;' +
      'padding: 0px;' +
      'height: 100%;' +
      'width: 100%;' +
      'overflow: hidden;' +
      'cursor: text;' +
      '-webkit-user-select: none;' +
      '-moz-user-select: none;');

  var style = doc.createElement('style');
  style.textContent = 'x-row {}';
  doc.head.appendChild(style);

  this.xrowCssRule_ = doc.styleSheets[0].cssRules[0];
  this.xrowCssRule_.style.display = 'block';

  this.userCssLink_ = doc.createElement('link');
  this.userCssLink_.setAttribute('rel', 'stylesheet');

  // TODO(rginda): Sorry, this 'screen_' isn't the same thing as hterm.Screen
  // from screen.js.  I need to pick a better name for one of them to avoid
  // the collision.
  this.screen_ = doc.createElement('x-screen');
  this.screen_.setAttribute('role', 'textbox');
  this.screen_.setAttribute('tabindex', '-1');
  this.screen_.style.cssText = (
      'display: block;' +
      'font-family: monospace;' +
      'font-size: 15px;' +
      'font-variant-ligatures: none;' +
      'height: 100%;' +
      'overflow-y: scroll; overflow-x: hidden;' +
      'white-space: pre;' +
      'width: 100%;' +
      'outline: none !important');

  doc.body.appendChild(this.screen_);

  this.screen_.addEventListener('scroll', this.onScroll_.bind(this));
  this.screen_.addEventListener('mousewheel', this.onScrollWheel_.bind(this));
  this.screen_.addEventListener(
      'DOMMouseScroll', this.onScrollWheel_.bind(this));
  this.screen_.addEventListener('copy', this.onCopy_.bind(this));
  this.screen_.addEventListener('paste', this.onPaste_.bind(this));

  doc.body.addEventListener('keydown', this.onBodyKeyDown_.bind(this));

  // This is the main container for the fixed rows.
  this.rowNodes_ = doc.createElement('div');
  this.rowNodes_.style.cssText = (
      'display: block;' +
      'position: fixed;' +
      'overflow: hidden;' +
      '-webkit-user-select: text;' +
      '-moz-user-select: text;');
  this.screen_.appendChild(this.rowNodes_);

  // Two nodes to hold offscreen text during the copy event.
  this.topSelectBag_ = doc.createElement('x-select-bag');
  this.topSelectBag_.style.cssText = (
      'display: block;' +
      'overflow: hidden;' +
      'white-space: pre;');

  this.bottomSelectBag_ = this.topSelectBag_.cloneNode();

  // Nodes above the top fold and below the bottom fold are hidden.  They are
  // only used to hold rows that are part of the selection but are currently
  // scrolled off the top or bottom of the visible range.
  this.topFold_ = doc.createElement('x-fold');
  this.topFold_.style.cssText = 'display: block;';
  this.rowNodes_.appendChild(this.topFold_);

  this.bottomFold_ = this.topFold_.cloneNode();
  this.rowNodes_.appendChild(this.bottomFold_);

  // This hidden div accounts for the vertical space that would be consumed by
  // all the rows in the buffer if they were visible.  It's what causes the
  // scrollbar to appear on the 'x-screen', and it moves within the screen when
  // the scrollbar is moved.
  //
  // It is set 'visibility: hidden' to keep the browser from trying to include
  // it in the selection when a user 'drag selects' upwards (drag the mouse to
  // select and scroll at the same time).  Without this, the selection gets
  // out of whack.
  this.scrollArea_ = doc.createElement('div');
  this.scrollArea_.style.cssText = 'visibility: hidden';
  this.screen_.appendChild(this.scrollArea_);

  // This svg element is used to detect when the browser is zoomed.  It must be
  // placed in the outermost document for currentScale to be correct.
  // TODO(rginda): This means that hterm nested in an iframe will not correctly
  // detect browser zoom level.  We should come up with a better solution.
  // Note: This must be http:// else Chrome cannot create the element correctly.
  var xmlns = 'http://www.w3.org/2000/svg';
  this.svg_ = this.div_.ownerDocument.createElementNS(xmlns, 'svg');
  this.svg_.setAttribute('xmlns', xmlns);
  this.svg_.setAttribute('version', '1.1');
  this.svg_.style.cssText = (
      'position: absolute;' +
      'top: 0;' +
      'left: 0;' +
      'visibility: hidden');


  // We send focus to this element just before a paste happens, so we can
  // capture the pasted text and forward it on to someone who cares.
  this.pasteTarget_ = doc.createElement('textarea');
  this.pasteTarget_.setAttribute('tabindex', '-1');
  this.pasteTarget_.style.cssText = (
    'position: absolute;' +
    'height: 1px;' +
    'width: 1px;' +
    'left: 0px; ' +
    'bottom: 0px;' +
    'opacity: 0');
  this.pasteTarget_.contentEditable = true;

  this.screen_.appendChild(this.pasteTarget_);
  this.pasteTarget_.addEventListener(
      'textInput', this.handlePasteTargetTextInput_.bind(this));

  this.resize();
};

/**
 * Select the font-family and font-smoothing for this scrollport.
 *
 * @param {string} fontFamily Value of the CSS 'font-family' to use for this
 *     scrollport.  Should be a monospace font.
 * @param {string} opt_smoothing Optional value for '-webkit-font-smoothing'.
 *     Defaults to an empty string if not specified.
 */
hterm.ScrollPort.prototype.setFontFamily = function(fontFamily, opt_smoothing) {
  this.screen_.style.fontFamily = fontFamily;
  if (opt_smoothing) {
    this.screen_.style.webkitFontSmoothing = opt_smoothing;
  } else {
    this.screen_.style.webkitFontSmoothing = '';
  }

  this.syncCharacterSize();
};

hterm.ScrollPort.prototype.getFontFamily = function() {
  return this.screen_.style.fontFamily;
};

/**
 * Set a custom stylesheet to include in the scrollport.
 *
 * Defaults to null, meaning no custom css is loaded.  Set it back to null or
 * the empty string to remove a previously applied custom css.
 */
hterm.ScrollPort.prototype.setUserCss = function(url) {
  if (url) {
    this.userCssLink_.setAttribute('href', url);

    if (!this.userCssLink_.parentNode)
      this.document_.head.appendChild(this.userCssLink_);
  } else if (this.userCssLink_.parentNode) {
    this.document_.head.removeChild(this.userCssLink_);
  }
};

hterm.ScrollPort.prototype.focus = function() {
  this.iframe_.focus();
  this.screen_.focus();
};

hterm.ScrollPort.prototype.getForegroundColor = function() {
  return this.screen_.style.color;
};

hterm.ScrollPort.prototype.setForegroundColor = function(color) {
  this.screen_.style.color = color;
};

hterm.ScrollPort.prototype.getBackgroundColor = function() {
  return this.screen_.style.backgroundColor;
};

hterm.ScrollPort.prototype.setBackgroundColor = function(color) {
  this.screen_.style.backgroundColor = color;
};

hterm.ScrollPort.prototype.setBackgroundImage = function(image) {
  this.screen_.style.backgroundImage = image;
};

hterm.ScrollPort.prototype.setBackgroundSize = function(size) {
  this.screen_.style.backgroundSize = size;
};

hterm.ScrollPort.prototype.setBackgroundPosition = function(position) {
  this.screen_.style.backgroundPosition = position;
};

hterm.ScrollPort.prototype.setCtrlVPaste = function(ctrlVPaste) {
  this.ctrlVPaste = ctrlVPaste;
};

/**
 * Get the usable size of the scrollport screen.
 *
 * The width will not include the scrollbar width.
 */
hterm.ScrollPort.prototype.getScreenSize = function() {
  var size = hterm.getClientSize(this.screen_);
  return {
    height: size.height,
    width: size.width - this.currentScrollbarWidthPx
  };
};

/**
 * Get the usable width of the scrollport screen.
 *
 * This the widget width minus scrollbar width.
 */
hterm.ScrollPort.prototype.getScreenWidth = function() {
  return this.getScreenSize().width ;
};

/**
 * Get the usable height of the scrollport screen.
 */
hterm.ScrollPort.prototype.getScreenHeight = function() {
  return this.getScreenSize().height;
};

/**
 * Return the document that holds the visible rows of this hterm.ScrollPort.
 */
hterm.ScrollPort.prototype.getDocument = function() {
  return this.document_;
};

/**
 * Returns the x-screen element that holds the rows of this hterm.ScrollPort.
 */
hterm.ScrollPort.prototype.getScreenNode = function() {
  return this.screen_;
};

/**
 * Clear out any cached rowNodes.
 */
hterm.ScrollPort.prototype.resetCache = function() {
  this.currentRowNodeCache_ = null;
  this.previousRowNodeCache_ = {};
};

/**
 * Change the current rowProvider.
 *
 * This will clear the row cache and cause a redraw.
 *
 * @param {Object} rowProvider An object capable of providing the rows
 *     in this hterm.ScrollPort.
 */
hterm.ScrollPort.prototype.setRowProvider = function(rowProvider) {
  this.resetCache();
  this.rowProvider_ = rowProvider;
  this.scheduleRedraw();
};

/**
 * Inform the ScrollPort that the root DOM nodes for some or all of the visible
 * rows are no longer valid.
 *
 * Specifically, this should be called if this.rowProvider_.getRowNode() now
 * returns an entirely different node than it did before.  It does not
 * need to be called if the content of a row node is the only thing that
 * changed.
 *
 * This skips some of the overhead of a full redraw, but should not be used
 * in cases where the scrollport has been scrolled, or when the row count has
 * changed.
 */
hterm.ScrollPort.prototype.invalidate = function() {
  var node = this.topFold_.nextSibling;
  while (node != this.bottomFold_) {
    var nextSibling = node.nextSibling;
    node.parentElement.removeChild(node);
    node = nextSibling;
  }

  this.previousRowNodeCache_ = null;
  var topRowIndex = this.getTopRowIndex();
  var bottomRowIndex = this.getBottomRowIndex(topRowIndex);

  this.drawVisibleRows_(topRowIndex, bottomRowIndex);
};

hterm.ScrollPort.prototype.scheduleInvalidate = function() {
  if (this.timeouts_.invalidate)
    return;

  var self = this;
  this.timeouts_.invalidate = setTimeout(function () {
      delete self.timeouts_.invalidate;
      self.invalidate();
    }, 0);
};

/**
 * Set the font size of the ScrollPort.
 */
hterm.ScrollPort.prototype.setFontSize = function(px) {
  this.screen_.style.fontSize = px + 'px';
  this.syncCharacterSize();
};

/**
 * Return the current font size of the ScrollPort.
 */
hterm.ScrollPort.prototype.getFontSize = function() {
  return parseInt(this.screen_.style.fontSize);
};

/**
 * Measure the size of a single character in pixels.
 *
 * @param {string} opt_weight The font weight to measure, or 'normal' if
 *     omitted.
 * @return {hterm.Size} A new hterm.Size object.
 */
hterm.ScrollPort.prototype.measureCharacterSize = function(opt_weight) {
  // Number of lines used to average the height of a single character.
  var numberOfLines = 100;
  var rulerSingleLineContents = ('XXXXXXXXXXXXXXXXXXXX' +
                                 'XXXXXXXXXXXXXXXXXXXX' +
                                 'XXXXXXXXXXXXXXXXXXXX' +
                                 'XXXXXXXXXXXXXXXXXXXX' +
                                 'XXXXXXXXXXXXXXXXXXXX');
  if (!this.ruler_) {
    this.ruler_ = this.document_.createElement('div');
    this.ruler_.style.cssText = (
        'position: absolute;' +
        'top: 0;' +
        'left: 0;' +
        'visibility: hidden;' +
        'height: auto !important;' +
        'width: auto !important;');

    // We need to put the text in a span to make the size calculation
    // work properly in Firefox
    this.rulerSpan_ = this.document_.createElement('span');
    var rulerContents = '' + rulerSingleLineContents;
    for (var i = 0; i < numberOfLines - 1; ++i)
      rulerContents += String.fromCharCode(13) + rulerSingleLineContents;

    this.rulerSpan_.innerHTML = rulerContents;
    this.ruler_.appendChild(this.rulerSpan_);

    this.rulerBaseline_ = this.document_.createElement('span');
    // We want to collapse it on the baseline
    this.rulerBaseline_.style.fontSize = '0px';
    this.rulerBaseline_.textContent = 'X';
  }

  this.rulerSpan_.style.fontWeight = opt_weight || '';

  this.rowNodes_.appendChild(this.ruler_);
  var rulerSize = hterm.getClientSize(this.rulerSpan_);

  var size = new hterm.Size(rulerSize.width / rulerSingleLineContents.length,
                            rulerSize.height / numberOfLines);

  this.ruler_.appendChild(this.rulerBaseline_);
  size.baseline = this.rulerBaseline_.offsetTop;
  this.ruler_.removeChild(this.rulerBaseline_);

  this.rowNodes_.removeChild(this.ruler_);

  this.div_.ownerDocument.body.appendChild(this.svg_);
  size.zoomFactor = this.svg_.currentScale;
  this.div_.ownerDocument.body.removeChild(this.svg_);

  return size;
};

/**
 * Synchronize the character size.
 *
 * This will re-measure the current character size and adjust the height
 * of an x-row to match.
 */
hterm.ScrollPort.prototype.syncCharacterSize = function() {
  this.characterSize = this.measureCharacterSize();

  var lineHeight = this.characterSize.height + 'px';
  this.xrowCssRule_.style.height = lineHeight;
  this.topSelectBag_.style.height = lineHeight;
  this.bottomSelectBag_.style.height = lineHeight;

  this.resize();

  if (this.DEBUG_) {
    // When we're debugging we add padding to the body so that the offscreen
    // elements are visible.
    this.document_.body.style.paddingTop =
        this.document_.body.style.paddingBottom =
        3 * this.characterSize.height + 'px';
  }
};

/**
 * Reset dimensions and visible row count to account for a change in the
 * dimensions of the 'x-screen'.
 */
hterm.ScrollPort.prototype.resize = function() {
  this.currentScrollbarWidthPx = hterm.getClientWidth(this.screen_) -
    this.screen_.clientWidth;

  this.syncScrollHeight();
  this.syncRowNodesDimensions_();

  var self = this;
  this.publish(
      'resize', { scrollPort: this },
      function() {
        self.scrollRowToBottom(self.rowProvider_.getRowCount());
        self.scheduleRedraw();
      });
};

/**
 * Set the position and size of the row nodes element.
 */
hterm.ScrollPort.prototype.syncRowNodesDimensions_ = function() {
  var screenSize = this.getScreenSize();

  this.lastScreenWidth_ = screenSize.width;
  this.lastScreenHeight_ = screenSize.height;

  // We don't want to show a partial row because it would be distracting
  // in a terminal, so we floor any fractional row count.
  this.visibleRowCount = lib.f.smartFloorDivide(
      screenSize.height, this.characterSize.height);

  // Then compute the height of our integral number of rows.
  var visibleRowsHeight = this.visibleRowCount * this.characterSize.height;

  // Then the difference between the screen height and total row height needs to
  // be made up for as top margin.  We need to record this value so it
  // can be used later to determine the topRowIndex.
  this.visibleRowTopMargin = 0;
  this.visibleRowBottomMargin = screenSize.height - visibleRowsHeight;

  this.topFold_.style.marginBottom = this.visibleRowTopMargin + 'px';


  var topFoldOffset = 0;
  var node = this.topFold_.previousSibling;
  while (node) {
    topFoldOffset += hterm.getClientHeight(node);
    node = node.previousSibling;
  }

  // Set the dimensions of the visible rows container.
  this.rowNodes_.style.width = screenSize.width + 'px';
  this.rowNodes_.style.height = visibleRowsHeight + topFoldOffset + 'px';
  this.rowNodes_.style.left = this.screen_.offsetLeft + 'px';
  this.rowNodes_.style.top = this.screen_.offsetTop - topFoldOffset + 'px';
};

hterm.ScrollPort.prototype.syncScrollHeight = function() {
  // Resize the scroll area to appear as though it contains every row.
  this.lastRowCount_ = this.rowProvider_.getRowCount();
  this.scrollArea_.style.height = (this.characterSize.height *
                                   this.lastRowCount_ +
                                   this.visibleRowTopMargin +
                                   this.visibleRowBottomMargin +
                                   'px');
};

/**
 * Schedule a redraw to happen asynchronously.
 *
 * If this method is called multiple times before the redraw has a chance to
 * run only one redraw occurs.
 */
hterm.ScrollPort.prototype.scheduleRedraw = function() {
  if (this.timeouts_.redraw)
    return;

  var self = this;
  this.timeouts_.redraw = setTimeout(function () {
      delete self.timeouts_.redraw;
      self.redraw_();
    }, 0);
};

/**
 * Redraw the current hterm.ScrollPort based on the current scrollbar position.
 *
 * When redrawing, we are careful to make sure that the rows that start or end
 * the current selection are not touched in any way.  Doing so would disturb
 * the selection, and cleaning up after that would cause flashes at best and
 * incorrect selection at worst.  Instead, we modify the DOM around these nodes.
 * We even stash the selection start/end outside of the visible area if
 * they are not supposed to be visible in the hterm.ScrollPort.
 */
hterm.ScrollPort.prototype.redraw_ = function() {
  this.resetSelectBags_();
  this.selection.sync();

  this.syncScrollHeight();

  this.currentRowNodeCache_ = {};

  var topRowIndex = this.getTopRowIndex();
  var bottomRowIndex = this.getBottomRowIndex(topRowIndex);

  this.drawTopFold_(topRowIndex);
  this.drawBottomFold_(bottomRowIndex);
  this.drawVisibleRows_(topRowIndex, bottomRowIndex);

  this.syncRowNodesDimensions_();

  this.previousRowNodeCache_ = this.currentRowNodeCache_;
  this.currentRowNodeCache_ = null;

  this.isScrolledEnd = (
    this.getTopRowIndex() + this.visibleRowCount >= this.lastRowCount_);
};

/**
 * Ensure that the nodes above the top fold are as they should be.
 *
 * If the selection start and/or end nodes are above the visible range
 * of this hterm.ScrollPort then the dom will be adjusted so that they appear
 * before the top fold (the first x-fold element, aka this.topFold).
 *
 * If not, the top fold will be the first element.
 *
 * It is critical that this method does not move the selection nodes.  Doing
 * so would clear the current selection.  Instead, the rest of the DOM is
 * adjusted around them.
 */
hterm.ScrollPort.prototype.drawTopFold_ = function(topRowIndex) {
  if (!this.selection.startRow ||
      this.selection.startRow.rowIndex >= topRowIndex) {
    // Selection is entirely below the top fold, just make sure the fold is
    // the first child.
    if (this.rowNodes_.firstChild != this.topFold_)
      this.rowNodes_.insertBefore(this.topFold_, this.rowNodes_.firstChild);

    return;
  }

  if (!this.selection.isMultiline ||
      this.selection.endRow.rowIndex >= topRowIndex) {
    // Only the startRow is above the fold.
    if (this.selection.startRow.nextSibling != this.topFold_)
      this.rowNodes_.insertBefore(this.topFold_,
                                  this.selection.startRow.nextSibling);
  } else {
    // Both rows are above the fold.
    if (this.selection.endRow.nextSibling != this.topFold_) {
      this.rowNodes_.insertBefore(this.topFold_,
                                  this.selection.endRow.nextSibling);
    }

    // Trim any intermediate lines.
    while (this.selection.startRow.nextSibling !=
           this.selection.endRow) {
      this.rowNodes_.removeChild(this.selection.startRow.nextSibling);
    }
  }

  while(this.rowNodes_.firstChild != this.selection.startRow) {
    this.rowNodes_.removeChild(this.rowNodes_.firstChild);
  }
};

/**
 * Ensure that the nodes below the bottom fold are as they should be.
 *
 * If the selection start and/or end nodes are below the visible range
 * of this hterm.ScrollPort then the dom will be adjusted so that they appear
 * after the bottom fold (the second x-fold element, aka this.bottomFold).
 *
 * If not, the bottom fold will be the last element.
 *
 * It is critical that this method does not move the selection nodes.  Doing
 * so would clear the current selection.  Instead, the rest of the DOM is
 * adjusted around them.
 */
hterm.ScrollPort.prototype.drawBottomFold_ = function(bottomRowIndex) {
  if (!this.selection.endRow ||
      this.selection.endRow.rowIndex <= bottomRowIndex) {
    // Selection is entirely above the bottom fold, just make sure the fold is
    // the last child.
    if (this.rowNodes_.lastChild != this.bottomFold_)
      this.rowNodes_.appendChild(this.bottomFold_);

    return;
  }

  if (!this.selection.isMultiline ||
      this.selection.startRow.rowIndex <= bottomRowIndex) {
    // Only the endRow is below the fold.
    if (this.bottomFold_.nextSibling != this.selection.endRow)
      this.rowNodes_.insertBefore(this.bottomFold_,
                                  this.selection.endRow);
  } else {
    // Both rows are below the fold.
    if (this.bottomFold_.nextSibling != this.selection.startRow) {
      this.rowNodes_.insertBefore(this.bottomFold_,
                                  this.selection.startRow);
    }

    // Trim any intermediate lines.
    while (this.selection.startRow.nextSibling !=
           this.selection.endRow) {
      this.rowNodes_.removeChild(this.selection.startRow.nextSibling);
    }
  }

  while(this.rowNodes_.lastChild != this.selection.endRow) {
    this.rowNodes_.removeChild(this.rowNodes_.lastChild);
  }
};

/**
 * Ensure that the rows between the top and bottom folds are as they should be.
 *
 * This method assumes that drawTopFold_() and drawBottomFold_() have already
 * run, and that they have left any visible selection row (selection start
 * or selection end) between the folds.
 *
 * It recycles DOM nodes from the previous redraw where possible, but will ask
 * the rowSource to make new nodes if necessary.
 *
 * It is critical that this method does not move the selection nodes.  Doing
 * so would clear the current selection.  Instead, the rest of the DOM is
 * adjusted around them.
 */
hterm.ScrollPort.prototype.drawVisibleRows_ = function(
    topRowIndex, bottomRowIndex) {
  var self = this;

  // Keep removing nodes, starting with currentNode, until we encounter
  // targetNode.  Throws on failure.
  function removeUntilNode(currentNode, targetNode) {
    while (currentNode != targetNode) {
      if (!currentNode)
        throw 'Did not encounter target node';

      if (currentNode == self.bottomFold_)
        throw 'Encountered bottom fold before target node';

      var deadNode = currentNode;
      currentNode = currentNode.nextSibling;
      deadNode.parentNode.removeChild(deadNode);
    }
  }

  // Shorthand for things we're going to use a lot.
  var selectionStartRow = this.selection.startRow;
  var selectionEndRow = this.selection.endRow;
  var bottomFold = this.bottomFold_;

  // The node we're examining during the current iteration.
  var node = this.topFold_.nextSibling;

  var targetDrawCount = Math.min(this.visibleRowCount,
                                 this.rowProvider_.getRowCount());

  for (var drawCount = 0; drawCount < targetDrawCount; drawCount++) {
    var rowIndex = topRowIndex + drawCount;

    if (node == bottomFold) {
      // We've hit the bottom fold, we need to insert a new row.
      var newNode = this.fetchRowNode_(rowIndex);
      if (!newNode) {
        console.log("Couldn't fetch row index: " + rowIndex);
        break;
      }

      this.rowNodes_.insertBefore(newNode, node);
      continue;
    }

    if (node.rowIndex == rowIndex) {
      // This node is in the right place, move along.
      node = node.nextSibling;
      continue;
    }

    if (selectionStartRow && selectionStartRow.rowIndex == rowIndex) {
      // The selection start row is supposed to be here, remove nodes until
      // we find it.
      removeUntilNode(node, selectionStartRow);
      node = selectionStartRow.nextSibling;
      continue;
    }

    if (selectionEndRow && selectionEndRow.rowIndex == rowIndex) {
      // The selection end row is supposed to be here, remove nodes until
      // we find it.
      removeUntilNode(node, selectionEndRow);
      node = selectionEndRow.nextSibling;
      continue;
    }

    if (node == selectionStartRow || node == selectionEndRow) {
      // We encountered the start/end of the selection, but we don't want it
      // yet.  Insert a new row instead.
      var newNode = this.fetchRowNode_(rowIndex);
      if (!newNode) {
        console.log("Couldn't fetch row index: " + rowIndex);
        break;
      }

      this.rowNodes_.insertBefore(newNode, node);
      continue;
    }

    // There is nothing special about this node, but it's in our way.  Replace
    // it with the node that should be here.
    var newNode = this.fetchRowNode_(rowIndex);
    if (!newNode) {
      console.log("Couldn't fetch row index: " + rowIndex);
      break;
    }

    if (node == newNode) {
      node = node.nextSibling;
      continue;
    }

    this.rowNodes_.insertBefore(newNode, node);
    if (!newNode.nextSibling)
      debugger;
    this.rowNodes_.removeChild(node);
    node = newNode.nextSibling;
  }

  if (node != this.bottomFold_)
    removeUntilNode(node, bottomFold);
};

/**
 * Empty out both select bags and remove them from the document.
 *
 * These nodes hold the text between the start and end of the selection
 * when that text is otherwise off screen.  They are filled out in the
 * onCopy_ event.
 */
hterm.ScrollPort.prototype.resetSelectBags_ = function() {
  if (this.topSelectBag_.parentNode) {
    this.topSelectBag_.textContent = '';
    this.topSelectBag_.parentNode.removeChild(this.topSelectBag_);
  }

  if (this.bottomSelectBag_.parentNode) {
    this.bottomSelectBag_.textContent = '';
    this.bottomSelectBag_.parentNode.removeChild(this.bottomSelectBag_);
  }
};

/**
 * Place a row node in the cache of visible nodes.
 *
 * This method may only be used during a redraw_.
 */
hterm.ScrollPort.prototype.cacheRowNode_ = function(rowNode) {
  this.currentRowNodeCache_[rowNode.rowIndex] = rowNode;
};

/**
 * Fetch the row node for the given index.
 *
 * This will return a node from the cache if possible, or will request one
 * from the RowProvider if not.
 *
 * If a redraw_ is in progress the row will be added to the current cache.
 */
hterm.ScrollPort.prototype.fetchRowNode_ = function(rowIndex) {
  var node;

  if (this.previousRowNodeCache_ && rowIndex in this.previousRowNodeCache_) {
    node = this.previousRowNodeCache_[rowIndex];
  } else {
    node = this.rowProvider_.getRowNode(rowIndex);
  }

  if (this.currentRowNodeCache_)
    this.cacheRowNode_(node);

  return node;
};

/**
 * Select all rows in the viewport.
 */
hterm.ScrollPort.prototype.selectAll = function() {
  var firstRow;

  if (this.topFold_.nextSibling.rowIndex != 0) {
    while (this.topFold_.previousSibling) {
      this.rowNodes_.removeChild(this.topFold_.previousSibling);
    }

    firstRow = this.fetchRowNode_(0);
    this.rowNodes_.insertBefore(firstRow, this.topFold_);
    this.syncRowNodesDimensions_();
  } else {
    firstRow = this.topFold_.nextSibling;
  }

  var lastRowIndex = this.rowProvider_.getRowCount() - 1;
  var lastRow;

  if (this.bottomFold_.previousSibling.rowIndex != lastRowIndex) {
    while (this.bottomFold_.nextSibling) {
      this.rowNodes_.removeChild(this.bottomFold_.nextSibling);
    }

    lastRow = this.fetchRowNode_(lastRowIndex);
    this.rowNodes_.appendChild(lastRow);
  } else {
    lastRow = this.bottomFold_.previousSibling.rowIndex;
  }

  var selection = this.document_.getSelection();
  selection.collapse(firstRow, 0);
  selection.extend(lastRow, lastRow.childNodes.length);

  this.selection.sync();
};

/**
 * Return the maximum scroll position in pixels.
 */
hterm.ScrollPort.prototype.getScrollMax_ = function(e) {
  return (hterm.getClientHeight(this.scrollArea_) +
          this.visibleRowTopMargin + this.visibleRowBottomMargin -
          hterm.getClientHeight(this.screen_));
};

/**
 * Scroll the given rowIndex to the top of the hterm.ScrollPort.
 *
 * @param {integer} rowIndex Index of the target row.
 */
hterm.ScrollPort.prototype.scrollRowToTop = function(rowIndex) {
  this.syncScrollHeight();

  this.isScrolledEnd = (
    rowIndex + this.visibleRowCount >= this.lastRowCount_);

  var scrollTop = rowIndex * this.characterSize.height +
      this.visibleRowTopMargin;

  var scrollMax = this.getScrollMax_();
  if (scrollTop > scrollMax)
    scrollTop = scrollMax;

  if (this.screen_.scrollTop == scrollTop)
    return;

  this.screen_.scrollTop = scrollTop;
  this.scheduleRedraw();
};

/**
 * Scroll the given rowIndex to the bottom of the hterm.ScrollPort.
 *
 * @param {integer} rowIndex Index of the target row.
 */
hterm.ScrollPort.prototype.scrollRowToBottom = function(rowIndex) {
  this.syncScrollHeight();

  this.isScrolledEnd = (
    rowIndex + this.visibleRowCount >= this.lastRowCount_);

  var scrollTop = rowIndex * this.characterSize.height +
      this.visibleRowTopMargin + this.visibleRowBottomMargin;
  scrollTop -= this.visibleRowCount * this.characterSize.height;

  if (scrollTop < 0)
    scrollTop = 0;

  if (this.screen_.scrollTop == scrollTop)
    return;

  this.screen_.scrollTop = scrollTop;
};

/**
 * Return the row index of the first visible row.
 *
 * This is based on the scroll position.  If a redraw_ is in progress this
 * returns the row that *should* be at the top.
 */
hterm.ScrollPort.prototype.getTopRowIndex = function() {
  return Math.round(this.screen_.scrollTop / this.characterSize.height);
};

/**
 * Return the row index of the last visible row.
 *
 * This is based on the scroll position.  If a redraw_ is in progress this
 * returns the row that *should* be at the bottom.
 */
hterm.ScrollPort.prototype.getBottomRowIndex = function(topRowIndex) {
  return topRowIndex + this.visibleRowCount - 1;
};

/**
 * Handler for scroll events.
 *
 * The onScroll event fires when scrollArea's scrollTop property changes.  This
 * may be due to the user manually move the scrollbar, or a programmatic change.
 */
hterm.ScrollPort.prototype.onScroll_ = function(e) {
  var screenSize = this.getScreenSize();
  if (screenSize.width != this.lastScreenWidth_ ||
      screenSize.height != this.lastScreenHeight_) {
    // This event may also fire during a resize (but before the resize event!).
    // This happens when the browser moves the scrollbar as part of the resize.
    // In these cases, we want to ignore the scroll event and let onResize
    // handle things.  If we don't, then we end up scrolling to the wrong
    // position after a resize.
    this.resize();
    return;
  }

  this.redraw_();
  this.publish('scroll', { scrollPort: this });
};

/**
 * Clients can override this if they want to hear scrollwheel events.
 *
 * Clients may call event.preventDefault() if they want to keep the scrollport
 * from also handling the events.
 */
hterm.ScrollPort.prototype.onScrollWheel = function(e) {};

/**
 * Handler for scroll-wheel events.
 *
 * The onScrollWheel event fires when the user moves their scrollwheel over this
 * hterm.ScrollPort.  Because the frontmost element in the hterm.ScrollPort is
 * a fixed position DIV, the scroll wheel does nothing by default.  Instead, we
 * have to handle it manually.
 */
hterm.ScrollPort.prototype.onScrollWheel_ = function(e) {
  this.onScrollWheel(e);

  if (e.defaultPrevented)
    return;

  // In FF, the event is DOMMouseScroll and puts the scroll pixel delta in the
  // 'detail' field of the event.  It also flips the mapping of which direction
  // a negative number means in the scroll.
  var delta = e.type == 'DOMMouseScroll' ? (-1 * e.detail) : e.wheelDeltaY;
  delta *= this.scrollWheelMultiplier_;

  var top = this.screen_.scrollTop - delta;
  if (top < 0)
    top = 0;

  var scrollMax = this.getScrollMax_();
  if (top > scrollMax)
    top = scrollMax;

  if (top != this.screen_.scrollTop) {
    // Moving scrollTop causes a scroll event, which triggers the redraw.
    this.screen_.scrollTop = top;

    // Only preventDefault when we've actually scrolled.  If there's nothing
    // to scroll we want to pass the event through so Chrome can detect the
    // overscroll.
    e.preventDefault();
  }
};

/**
 * Handler for resize events.
 *
 * The browser will resize us such that the top row stays at the top, but we
 * prefer to the bottom row to stay at the bottom.
 */
hterm.ScrollPort.prototype.onResize_ = function(e) {
  // Re-measure, since onResize also happens for browser zoom changes.
  this.syncCharacterSize();
  this.resize();
};

/**
 * Clients can override this if they want to hear copy events.
 *
 * Clients may call event.preventDefault() if they want to keep the scrollport
 * from also handling the events.
 */
hterm.ScrollPort.prototype.onCopy = function(e) { };

/**
 * Handler for copy-to-clipboard events.
 *
 * If some or all of the selected rows are off screen we may need to fill in
 * the rows between selection start and selection end.  This handler determines
 * if we're missing some of the selected text, and if so populates one or both
 * of the "select bags" with the missing text.
 */
hterm.ScrollPort.prototype.onCopy_ = function(e) {
  this.onCopy(e);

  if (e.defaultPrevented)
    return;

  this.resetSelectBags_();
  this.selection.sync();

  if (!this.selection.startRow ||
      this.selection.endRow.rowIndex - this.selection.startRow.rowIndex < 2) {
    return;
  }

  var topRowIndex = this.getTopRowIndex();
  var bottomRowIndex = this.getBottomRowIndex(topRowIndex);

  if (this.selection.startRow.rowIndex < topRowIndex) {
    // Start of selection is above the top fold.
    var endBackfillIndex;

    if (this.selection.endRow.rowIndex < topRowIndex) {
      // Entire selection is above the top fold.
      endBackfillIndex = this.selection.endRow.rowIndex;
    } else {
      // Selection extends below the top fold.
      endBackfillIndex = this.topFold_.nextSibling.rowIndex;
    }

    this.topSelectBag_.textContent = this.rowProvider_.getRowsText(
        this.selection.startRow.rowIndex + 1, endBackfillIndex);
    this.rowNodes_.insertBefore(this.topSelectBag_,
                                this.selection.startRow.nextSibling);
    this.syncRowNodesDimensions_();
  }

  if (this.selection.endRow.rowIndex > bottomRowIndex) {
    // Selection ends below the bottom fold.
    var startBackfillIndex;

    if (this.selection.startRow.rowIndex > bottomRowIndex) {
      // Entire selection is below the bottom fold.
      startBackfillIndex = this.selection.startRow.rowIndex + 1;
    } else {
      // Selection starts above the bottom fold.
      startBackfillIndex = this.bottomFold_.previousSibling.rowIndex + 1;
    }

    this.bottomSelectBag_.textContent = this.rowProvider_.getRowsText(
        startBackfillIndex, this.selection.endRow.rowIndex);
    this.rowNodes_.insertBefore(this.bottomSelectBag_, this.selection.endRow);
  }
};

/**
 * Focuses on the paste target on a ctrl-v keydown event, as in
 * FF a content editable element must be focused before the paste event.
 */
hterm.ScrollPort.prototype.onBodyKeyDown_ = function(e) {
  if (!this.ctrlVPaste)
    return;

  var key = String.fromCharCode(e.which);
  var lowerKey = key.toLowerCase();
  if ((e.ctrlKey || e.metaKey) && lowerKey == "v")
    this.pasteTarget_.focus();
};

/**
 * Handle a paste event on the the ScrollPort's screen element.
 */
hterm.ScrollPort.prototype.onPaste_ = function(e) {
  this.pasteTarget_.focus();

  var self = this;
  setTimeout(function() {
      self.publish('paste', { text: self.pasteTarget_.value });
      self.pasteTarget_.value = '';
      self.screen_.focus();
    }, 0);
};

/**
 * Handles a textInput event on the paste target. Stops this from
 * propagating as we want this to be handled in the onPaste_ method.
 */
hterm.ScrollPort.prototype.handlePasteTargetTextInput_ = function(e) {
  e.stopPropagation();
};

/**
 * Set the vertical scrollbar mode of the ScrollPort.
 */
hterm.ScrollPort.prototype.setScrollbarVisible = function(state) {
  this.screen_.style.overflowY = state ? 'scroll' : 'hidden';
};

/**
 * Set scroll wheel multiplier. This alters how much the screen scrolls on
 * mouse wheel events.
 */
hterm.ScrollPort.prototype.setScrollWheelMoveMultipler = function(multiplier) {
  this.scrollWheelMultiplier_ = multiplier;
};
// SOURCE FILE: hterm/js/hterm_terminal.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.colors', 'lib.PreferenceManager', 'lib.resource', 'lib.wc',
          'lib.f', 'hterm.Keyboard', 'hterm.Options', 'hterm.PreferenceManager',
          'hterm.Screen', 'hterm.ScrollPort', 'hterm.Size',
          'hterm.TextAttributes', 'hterm.VT');

/**
 * Constructor for the Terminal class.
 *
 * A Terminal pulls together the hterm.ScrollPort, hterm.Screen and hterm.VT100
 * classes to provide the complete terminal functionality.
 *
 * There are a number of lower-level Terminal methods that can be called
 * directly to manipulate the cursor, text, scroll region, and other terminal
 * attributes.  However, the primary method is interpret(), which parses VT
 * escape sequences and invokes the appropriate Terminal methods.
 *
 * This class was heavily influenced by Cory Maccarrone's Framebuffer class.
 *
 * TODO(rginda): Eventually we're going to need to support characters which are
 * displayed twice as wide as standard latin characters.  This is to support
 * CJK (and possibly other character sets).
 *
 * @param {string} opt_profileId Optional preference profile name.  If not
 *     provided, defaults to 'default'.
 */
hterm.Terminal = function(opt_profileId) {
  this.profileId_ = null;

  // Two screen instances.
  this.primaryScreen_ = new hterm.Screen();
  this.alternateScreen_ = new hterm.Screen();

  // The "current" screen.
  this.screen_ = this.primaryScreen_;

  // The local notion of the screen size.  ScreenBuffers also have a size which
  // indicates their present size.  During size changes, the two may disagree.
  // Also, the inactive screen's size is not altered until it is made the active
  // screen.
  this.screenSize = new hterm.Size(0, 0);

  // The scroll port we'll be using to display the visible rows.
  this.scrollPort_ = new hterm.ScrollPort(this);
  this.scrollPort_.subscribe('resize', this.onResize_.bind(this));
  this.scrollPort_.subscribe('scroll', this.onScroll_.bind(this));
  this.scrollPort_.subscribe('paste', this.onPaste_.bind(this));
  this.scrollPort_.onCopy = this.onCopy_.bind(this);

  // The div that contains this terminal.
  this.div_ = null;

  // The document that contains the scrollPort.  Defaulted to the global
  // document here so that the terminal is functional even if it hasn't been
  // inserted into a document yet, but re-set in decorate().
  this.document_ = window.document;

  // The rows that have scrolled off screen and are no longer addressable.
  this.scrollbackRows_ = [];

  // Saved tab stops.
  this.tabStops_ = [];

  // Keep track of whether default tab stops have been erased; after a TBC
  // clears all tab stops, defaults aren't restored on resize until a reset.
  this.defaultTabStops = true;

  // The VT's notion of the top and bottom rows.  Used during some VT
  // cursor positioning and scrolling commands.
  this.vtScrollTop_ = null;
  this.vtScrollBottom_ = null;

  // The DIV element for the visible cursor.
  this.cursorNode_ = null;

  // The current cursor shape of the terminal.
  this.cursorShape_ = hterm.Terminal.cursorShape.BLOCK;

  // The current color of the cursor.
  this.cursorColor_ = null;

  // Cursor blink on/off cycle in ms, overwritten by prefs once they're loaded.
  this.cursorBlinkCycle_ = [100, 100];

  // Pre-bound onCursorBlink_ handler, so we don't have to do this for each
  // cursor on/off servicing.
  this.myOnCursorBlink_ = this.onCursorBlink_.bind(this);

  // These prefs are cached so we don't have to read from local storage with
  // each output and keystroke.  They are initialized by the preference manager.
  this.backgroundColor_ = null;
  this.foregroundColor_ = null;
  this.scrollOnOutput_ = null;
  this.scrollOnKeystroke_ = null;

  // True if we should override mouse event reporting to allow local selection.
  this.defeatMouseReports_ = false;

  // Terminal bell sound.
  this.bellAudio_ = this.document_.createElement('audio');
  this.bellAudio_.setAttribute('preload', 'auto');

  // All terminal bell notifications that have been generated (not necessarily
  // shown).
  this.bellNotificationList_ = [];

  // Whether we have permission to display notifications.
  this.desktopNotificationBell_ = false;

  // Cursor position and attributes saved with DECSC.
  this.savedOptions_ = {};

  // The current mode bits for the terminal.
  this.options_ = new hterm.Options();

  // Timeouts we might need to clear.
  this.timeouts_ = {};

  // The VT escape sequence interpreter.
  this.vt = new hterm.VT(this);

  // The keyboard handler.
  this.keyboard = new hterm.Keyboard(this);

  // General IO interface that can be given to third parties without exposing
  // the entire terminal object.
  this.io = new hterm.Terminal.IO(this);

  // True if mouse-click-drag should scroll the terminal.
  this.enableMouseDragScroll = true;

  this.copyOnSelect = null;
  this.mousePasteButton = null;

  // Whether to use the default window copy behavior.
  this.useDefaultWindowCopy = false;

  this.clearSelectionAfterCopy = true;

  this.realizeSize_(80, 24);
  this.setDefaultTabStops();

  this.setProfile(opt_profileId || 'default',
                  function() { this.onTerminalReady(); }.bind(this));
};

/**
 * Possible cursor shapes.
 */
hterm.Terminal.cursorShape = {
  BLOCK: 'BLOCK',
  BEAM: 'BEAM',
  UNDERLINE: 'UNDERLINE'
};

/**
 * Clients should override this to be notified when the terminal is ready
 * for use.
 *
 * The terminal initialization is asynchronous, and shouldn't be used before
 * this method is called.
 */
hterm.Terminal.prototype.onTerminalReady = function() { };

/**
 * Default tab with of 8 to match xterm.
 */
hterm.Terminal.prototype.tabWidth = 8;

/**
 * Select a preference profile.
 *
 * This will load the terminal preferences for the given profile name and
 * associate subsequent preference changes with the new preference profile.
 *
 * @param {string} profileId The name of the preference profile.  Forward slash
 *     characters will be removed from the name.
 * @param {function} opt_callback Optional callback to invoke when the profile
 *     transition is complete.
 */
hterm.Terminal.prototype.setProfile = function(profileId, opt_callback) {
  this.profileId_ = profileId.replace(/\//g, '');

  var terminal = this;

  if (this.prefs_)
    this.prefs_.deactivate();

  this.prefs_ = new hterm.PreferenceManager(this.profileId_);
  this.prefs_.addObservers(null, {
    'alt-gr-mode': function(v) {
      if (v == null) {
        if (navigator.language.toLowerCase() == 'en-us') {
          v = 'none';
        } else {
          v = 'right-alt';
        }
      } else if (typeof v == 'string') {
        v = v.toLowerCase();
      } else {
        v = 'none';
      }

      if (!/^(none|ctrl-alt|left-alt|right-alt)$/.test(v))
        v = 'none';

      terminal.keyboard.altGrMode = v;
    },

    'alt-backspace-is-meta-backspace': function(v) {
      terminal.keyboard.altBackspaceIsMetaBackspace = v;
    },

    'alt-is-meta': function(v) {
      terminal.keyboard.altIsMeta = v;
    },

    'alt-sends-what': function(v) {
      if (!/^(escape|8-bit|browser-key)$/.test(v))
        v = 'escape';

      terminal.keyboard.altSendsWhat = v;
    },

    'audible-bell-sound': function(v) {
      var ary = v.match(/^lib-resource:(\S+)/);
      if (ary) {
        terminal.bellAudio_.setAttribute('src',
                                         lib.resource.getDataUrl(ary[1]));
      } else {
        terminal.bellAudio_.setAttribute('src', v);
      }
    },

    'desktop-notification-bell': function(v) {
      if (v && Notification) {
        terminal.desktopNotificationBell_ =
            Notification.permission === 'granted';
        if (!terminal.desktopNotificationBell_) {
          // Note: We don't call Notification.requestPermission here because
          // Chrome requires the call be the result of a user action (such as an
          // onclick handler), and pref listeners are run asynchronously.
          //
          // A way of working around this would be to display a dialog in the
          // terminal with a "click-to-request-permission" button.
          console.warn('desktop-notification-bell is true but we do not have ' +
                       'permission to display notifications.');
        }
      } else {
        terminal.desktopNotificationBell_ = false;
      }
    },

    'background-color': function(v) {
      terminal.setBackgroundColor(v);
    },

    'background-image': function(v) {
      terminal.scrollPort_.setBackgroundImage(v);
    },

    'background-size': function(v) {
      terminal.scrollPort_.setBackgroundSize(v);
    },

    'background-position': function(v) {
      terminal.scrollPort_.setBackgroundPosition(v);
    },

    'backspace-sends-backspace': function(v) {
      terminal.keyboard.backspaceSendsBackspace = v;
    },

    'character-map-overrides': function(v) {
      if (!(v == null || v instanceof Object)) {
        console.warn('Preference character-map-modifications is not an ' +
                     'object: ' + v);
        return;
      }

      for (var code in v) {
        var glmap = hterm.VT.CharacterMap.maps[code].glmap;
        for (var received in v[code]) {
          glmap[received] = v[code][received];
        }
        hterm.VT.CharacterMap.maps[code].reset(glmap);
      }
    },

    'cursor-blink': function(v) {
      terminal.setCursorBlink(!!v);
    },

    'cursor-blink-cycle': function(v) {
        if (v instanceof Array &&
            typeof v[0] == 'number' &&
            typeof v[1] == 'number') {
          terminal.cursorBlinkCycle_ = v;
        } else if (typeof v == 'number') {
          terminal.cursorBlinkCycle_ = [v, v];
        } else {
          // Fast blink indicates an error.
          terminal.cursorBlinkCycle_ = [100, 100];
        }
    },

    'cursor-color': function(v) {
      terminal.setCursorColor(v);
    },

    'color-palette-overrides': function(v) {
      if (!(v == null || v instanceof Object || v instanceof Array)) {
        console.warn('Preference color-palette-overrides is not an array or ' +
                     'object: ' + v);
        return;
      }

      lib.colors.colorPalette = lib.colors.stockColorPalette.concat();

      if (v) {
        for (var key in v) {
          var i = parseInt(key);
          if (isNaN(i) || i < 0 || i > 255) {
            console.log('Invalid value in palette: ' + key + ': ' + v[key]);
            continue;
          }

          if (v[i]) {
            var rgb = lib.colors.normalizeCSS(v[i]);
            if (rgb)
              lib.colors.colorPalette[i] = rgb;
          }
        }
      }

      terminal.primaryScreen_.textAttributes.resetColorPalette();
      terminal.alternateScreen_.textAttributes.resetColorPalette();
    },

    'copy-on-select': function(v) {
      terminal.copyOnSelect = !!v;
    },

    'use-default-window-copy': function(v) {
      terminal.useDefaultWindowCopy = !!v;
    },

    'clear-selection-after-copy': function(v) {
      terminal.clearSelectionAfterCopy = !!v;
    },

    'ctrl-plus-minus-zero-zoom': function(v) {
      terminal.keyboard.ctrlPlusMinusZeroZoom = v;
    },

    'ctrl-c-copy': function(v) {
      terminal.keyboard.ctrlCCopy = v;
    },

    'ctrl-v-paste': function(v) {
      terminal.keyboard.ctrlVPaste = v;
      terminal.scrollPort_.setCtrlVPaste(v);
    },

    'east-asian-ambiguous-as-two-column': function(v) {
      lib.wc.regardCjkAmbiguous = v;
    },

    'enable-8-bit-control': function(v) {
      terminal.vt.enable8BitControl = !!v;
    },

    'enable-bold': function(v) {
      terminal.syncBoldSafeState();
    },

    'enable-bold-as-bright': function(v) {
      terminal.primaryScreen_.textAttributes.enableBoldAsBright = !!v;
      terminal.alternateScreen_.textAttributes.enableBoldAsBright = !!v;
    },

    'enable-blink': function(v) {
      terminal.syncBlinkState();
    },

    'enable-clipboard-write': function(v) {
      terminal.vt.enableClipboardWrite = !!v;
    },

    'enable-dec12': function(v) {
      terminal.vt.enableDec12 = !!v;
    },

    'font-family': function(v) {
      terminal.syncFontFamily();
    },

    'font-size': function(v) {
      terminal.setFontSize(v);
    },

    'font-smoothing': function(v) {
      terminal.syncFontFamily();
    },

    'foreground-color': function(v) {
      terminal.setForegroundColor(v);
    },

    'home-keys-scroll': function(v) {
      terminal.keyboard.homeKeysScroll = v;
    },

    'keybindings': function(v) {
      terminal.keyboard.bindings.clear();

      if (!v)
        return;

      if (!(v instanceof Object)) {
        console.error('Error in keybindings preference: Expected object');
        return;
      }

      try {
        terminal.keyboard.bindings.addBindings(v);
      } catch (ex) {
        console.error('Error in keybindings preference: ' + ex);
      }
    },

    'max-string-sequence': function(v) {
      terminal.vt.maxStringSequence = v;
    },

    'media-keys-are-fkeys': function(v) {
      terminal.keyboard.mediaKeysAreFKeys = v;
    },

    'meta-sends-escape': function(v) {
      terminal.keyboard.metaSendsEscape = v;
    },

    'mouse-paste-button': function(v) {
      terminal.syncMousePasteButton();
    },

    'page-keys-scroll': function(v) {
      terminal.keyboard.pageKeysScroll = v;
    },

    'pass-alt-number': function(v) {
      if (v == null) {
        var osx = window.navigator.userAgent.match(/Mac OS X/);

        // Let Alt-1..9 pass to the browser (to control tab switching) on
        // non-OS X systems, or if hterm is not opened in an app window.
        v = (!osx && hterm.windowType != 'popup');
      }

      terminal.passAltNumber = v;
    },

    'pass-ctrl-number': function(v) {
      if (v == null) {
        var osx = window.navigator.userAgent.match(/Mac OS X/);

        // Let Ctrl-1..9 pass to the browser (to control tab switching) on
        // non-OS X systems, or if hterm is not opened in an app window.
        v = (!osx && hterm.windowType != 'popup');
      }

      terminal.passCtrlNumber = v;
    },

    'pass-meta-number': function(v) {
      if (v == null) {
        var osx = window.navigator.userAgent.match(/Mac OS X/);

        // Let Meta-1..9 pass to the browser (to control tab switching) on
        // OS X systems, or if hterm is not opened in an app window.
        v = (osx && hterm.windowType != 'popup');
      }

      terminal.passMetaNumber = v;
    },

    'pass-meta-v': function(v) {
      terminal.keyboard.passMetaV = v;
    },

    'receive-encoding': function(v) {
       if (!(/^(utf-8|raw)$/).test(v)) {
         console.warn('Invalid value for "receive-encoding": ' + v);
         v = 'utf-8';
       }

       terminal.vt.characterEncoding = v;
    },

    'scroll-on-keystroke': function(v) {
      terminal.scrollOnKeystroke_ = v;
    },

    'scroll-on-output': function(v) {
      terminal.scrollOnOutput_ = v;
    },

    'scrollbar-visible': function(v) {
      terminal.setScrollbarVisible(v);
    },

    'scroll-wheel-move-multiplier': function(v) {
      terminal.setScrollWheelMoveMultipler(v);
    },

    'send-encoding': function(v) {
       if (!(/^(utf-8|raw)$/).test(v)) {
         console.warn('Invalid value for "send-encoding": ' + v);
         v = 'utf-8';
       }

       terminal.keyboard.characterEncoding = v;
    },

    'shift-insert-paste': function(v) {
      terminal.keyboard.shiftInsertPaste = v;
    },

    'user-css': function(v) {
      terminal.scrollPort_.setUserCss(v);
    }
  });

  this.prefs_.readStorage(function() {
    this.prefs_.notifyAll();

    if (opt_callback)
      opt_callback();
  }.bind(this));
};


/**
 * Returns the preferences manager used for configuring this terminal.
 *
 * @return {hterm.PreferenceManager}
 */
hterm.Terminal.prototype.getPrefs = function() {
  return this.prefs_;
};

/**
 * Enable or disable bracketed paste mode.
 *
 * @param {boolean} state The value to set.
 */
hterm.Terminal.prototype.setBracketedPaste = function(state) {
  this.options_.bracketedPaste = state;
};

/**
 * Set the color for the cursor.
 *
 * If you want this setting to persist, set it through prefs_, rather than
 * with this method.
 *
 * @param {string} color The color to set.
 */
hterm.Terminal.prototype.setCursorColor = function(color) {
  this.cursorColor_ = color;
  this.cursorNode_.style.backgroundColor = color;
  this.cursorNode_.style.borderColor = color;
};

/**
 * Return the current cursor color as a string.
 * @return {string}
 */
hterm.Terminal.prototype.getCursorColor = function() {
  return this.cursorColor_;
};

/**
 * Enable or disable mouse based text selection in the terminal.
 *
 * @param {boolean} state The value to set.
 */
hterm.Terminal.prototype.setSelectionEnabled = function(state) {
  this.enableMouseDragScroll = state;
};

/**
 * Set the background color.
 *
 * If you want this setting to persist, set it through prefs_, rather than
 * with this method.
 *
 * @param {string} color The color to set.
 */
hterm.Terminal.prototype.setBackgroundColor = function(color) {
  this.backgroundColor_ = lib.colors.normalizeCSS(color);
  this.primaryScreen_.textAttributes.setDefaults(
      this.foregroundColor_, this.backgroundColor_);
  this.alternateScreen_.textAttributes.setDefaults(
      this.foregroundColor_, this.backgroundColor_);
  this.scrollPort_.setBackgroundColor(color);
};

/**
 * Return the current terminal background color.
 *
 * Intended for use by other classes, so we don't have to expose the entire
 * prefs_ object.
 *
 * @return {string}
 */
hterm.Terminal.prototype.getBackgroundColor = function() {
  return this.backgroundColor_;
};

/**
 * Set the foreground color.
 *
 * If you want this setting to persist, set it through prefs_, rather than
 * with this method.
 *
 * @param {string} color The color to set.
 */
hterm.Terminal.prototype.setForegroundColor = function(color) {
  this.foregroundColor_ = lib.colors.normalizeCSS(color);
  this.primaryScreen_.textAttributes.setDefaults(
      this.foregroundColor_, this.backgroundColor_);
  this.alternateScreen_.textAttributes.setDefaults(
      this.foregroundColor_, this.backgroundColor_);
  this.scrollPort_.setForegroundColor(color);
};

/**
 * Return the current terminal foreground color.
 *
 * Intended for use by other classes, so we don't have to expose the entire
 * prefs_ object.
 *
 * @return {string}
 */
hterm.Terminal.prototype.getForegroundColor = function() {
  return this.foregroundColor_;
};

/**
 * Create a new instance of a terminal command and run it with a given
 * argument string.
 *
 * @param {function} commandClass The constructor for a terminal command.
 * @param {string} argString The argument string to pass to the command.
 */
hterm.Terminal.prototype.runCommandClass = function(commandClass, argString) {
  var environment = this.prefs_.get('environment');
  if (typeof environment != 'object' || environment == null)
    environment = {};

  var self = this;
  this.command = new commandClass(
      { argString: argString || '',
        io: this.io.push(),
        environment: environment,
        onExit: function(code) {
          self.io.pop();
          self.uninstallKeyboard();
          if (self.prefs_.get('close-on-exit'))
              window.close();
        }
      });

  this.installKeyboard();
  this.command.run();
};

/**
 * Returns true if the current screen is the primary screen, false otherwise.
 *
 * @return {boolean}
 */
hterm.Terminal.prototype.isPrimaryScreen = function() {
  return this.screen_ == this.primaryScreen_;
};

/**
 * Install the keyboard handler for this terminal.
 *
 * This will prevent the browser from seeing any keystrokes sent to the
 * terminal.
 */
hterm.Terminal.prototype.installKeyboard = function() {
  this.keyboard.installKeyboard(this.scrollPort_.getDocument().body);
}

/**
 * Uninstall the keyboard handler for this terminal.
 */
hterm.Terminal.prototype.uninstallKeyboard = function() {
  this.keyboard.installKeyboard(null);
}

/**
 * Set the font size for this terminal.
 *
 * Call setFontSize(0) to reset to the default font size.
 *
 * This function does not modify the font-size preference.
 *
 * @param {number} px The desired font size, in pixels.
 */
hterm.Terminal.prototype.setFontSize = function(px) {
  if (px === 0)
    px = this.prefs_.get('font-size');

  this.scrollPort_.setFontSize(px);
  if (this.wcCssRule_) {
    this.wcCssRule_.style.width = this.scrollPort_.characterSize.width * 2 +
        'px';
  }
};

/**
 * Get the current font size.
 *
 * @return {number}
 */
hterm.Terminal.prototype.getFontSize = function() {
  return this.scrollPort_.getFontSize();
};

/**
 * Get the current font family.
 *
 * @return {string}
 */
hterm.Terminal.prototype.getFontFamily = function() {
  return this.scrollPort_.getFontFamily();
};

/**
 * Set the CSS "font-family" for this terminal.
 */
hterm.Terminal.prototype.syncFontFamily = function() {
  this.scrollPort_.setFontFamily(this.prefs_.get('font-family'),
                                 this.prefs_.get('font-smoothing'));
  this.syncBoldSafeState();
};

/**
 * Set this.mousePasteButton based on the mouse-paste-button pref,
 * autodetecting if necessary.
 */
hterm.Terminal.prototype.syncMousePasteButton = function() {
  var button = this.prefs_.get('mouse-paste-button');
  if (typeof button == 'number') {
    this.mousePasteButton = button;
    return;
  }

  var ary = navigator.userAgent.match(/\(X11;\s+(\S+)/);
  if (!ary || ary[2] == 'CrOS') {
    this.mousePasteButton = 2;
  } else {
    this.mousePasteButton = 3;
  }
};

/**
 * Enable or disable bold based on the enable-bold pref, autodetecting if
 * necessary.
 */
hterm.Terminal.prototype.syncBoldSafeState = function() {
  var enableBold = this.prefs_.get('enable-bold');
  if (enableBold !== null) {
    this.primaryScreen_.textAttributes.enableBold = enableBold;
    this.alternateScreen_.textAttributes.enableBold = enableBold;
    return;
  }

  var normalSize = this.scrollPort_.measureCharacterSize();
  var boldSize = this.scrollPort_.measureCharacterSize('bold');

  var isBoldSafe = normalSize.equals(boldSize);
  if (!isBoldSafe) {
    console.warn('Bold characters disabled: Size of bold weight differs ' +
                 'from normal.  Font family is: ' +
                 this.scrollPort_.getFontFamily());
  }

  this.primaryScreen_.textAttributes.enableBold = isBoldSafe;
  this.alternateScreen_.textAttributes.enableBold = isBoldSafe;
};

/**
 * Enable or disable blink based on the enable-blink pref.
 */
hterm.Terminal.prototype.syncBlinkState = function() {
  this.document_.documentElement.style.setProperty(
      '--hterm-blink-node-duration',
      this.prefs_.get('enable-blink') ? '0.7s' : '0');
};

/**
 * Return a copy of the current cursor position.
 *
 * @return {hterm.RowCol} The RowCol object representing the current position.
 */
hterm.Terminal.prototype.saveCursor = function() {
  return this.screen_.cursorPosition.clone();
};

/**
 * Return the current text attributes.
 *
 * @return {string}
 */
hterm.Terminal.prototype.getTextAttributes = function() {
  return this.screen_.textAttributes;
};

/**
 * Set the text attributes.
 *
 * @param {string} textAttributes The attributes to set.
 */
hterm.Terminal.prototype.setTextAttributes = function(textAttributes) {
  this.screen_.textAttributes = textAttributes;
};

/**
 * Return the current browser zoom factor applied to the terminal.
 *
 * @return {number} The current browser zoom factor.
 */
hterm.Terminal.prototype.getZoomFactor = function() {
  return this.scrollPort_.characterSize.zoomFactor;
};

/**
 * Change the title of this terminal's window.
 *
 * @param {string} title The title to set.
 */
hterm.Terminal.prototype.setWindowTitle = function(title) {
  window.document.title = title;
};

/**
 * Restore a previously saved cursor position.
 *
 * @param {hterm.RowCol} cursor The position to restore.
 */
hterm.Terminal.prototype.restoreCursor = function(cursor) {
  var row = lib.f.clamp(cursor.row, 0, this.screenSize.height - 1);
  var column = lib.f.clamp(cursor.column, 0, this.screenSize.width - 1);
  this.screen_.setCursorPosition(row, column);
  if (cursor.column > column ||
      cursor.column == column && cursor.overflow) {
    this.screen_.cursorPosition.overflow = true;
  }
};

/**
 * Clear the cursor's overflow flag.
 */
hterm.Terminal.prototype.clearCursorOverflow = function() {
  this.screen_.cursorPosition.overflow = false;
};

/**
 * Sets the cursor shape
 *
 * @param {string} shape The shape to set.
 */
hterm.Terminal.prototype.setCursorShape = function(shape) {
  this.cursorShape_ = shape;
  this.restyleCursor_();
}

/**
 * Get the cursor shape
 *
 * @return {string}
 */
hterm.Terminal.prototype.getCursorShape = function() {
  return this.cursorShape_;
}

/**
 * Set the width of the terminal, resizing the UI to match.
 *
 * @param {number} columnCount
 */
hterm.Terminal.prototype.setWidth = function(columnCount) {
  if (columnCount == null) {
    this.div_.style.width = '100%';
    return;
  }

  this.div_.style.width = Math.ceil(
      this.scrollPort_.characterSize.width *
      columnCount + this.scrollPort_.currentScrollbarWidthPx) + 'px';
  this.realizeSize_(columnCount, this.screenSize.height);
  this.scheduleSyncCursorPosition_();
};

/**
 * Set the height of the terminal, resizing the UI to match.
 *
 * @param {number} rowCount The height in rows.
 */
hterm.Terminal.prototype.setHeight = function(rowCount) {
  if (rowCount == null) {
    this.div_.style.height = '100%';
    return;
  }

  this.div_.style.height =
      this.scrollPort_.characterSize.height * rowCount + 'px';
  this.realizeSize_(this.screenSize.width, rowCount);
  this.scheduleSyncCursorPosition_();
};

/**
 * Deal with terminal size changes.
 *
 * @param {number} columnCount The number of columns.
 * @param {number} rowCount The number of rows.
 */
hterm.Terminal.prototype.realizeSize_ = function(columnCount, rowCount) {
  if (columnCount != this.screenSize.width)
    this.realizeWidth_(columnCount);

  if (rowCount != this.screenSize.height)
    this.realizeHeight_(rowCount);

  // Send new terminal size to plugin.
  this.io.onTerminalResize_(columnCount, rowCount);
};

/**
 * Deal with terminal width changes.
 *
 * This function does what needs to be done when the terminal width changes
 * out from under us.  It happens here rather than in onResize_() because this
 * code may need to run synchronously to handle programmatic changes of
 * terminal width.
 *
 * Relying on the browser to send us an async resize event means we may not be
 * in the correct state yet when the next escape sequence hits.
 *
 * @param {number} columnCount The number of columns.
 */
hterm.Terminal.prototype.realizeWidth_ = function(columnCount) {
  if (columnCount <= 0)
    throw new Error('Attempt to realize bad width: ' + columnCount);

  var deltaColumns = columnCount - this.screen_.getWidth();

  this.screenSize.width = columnCount;
  this.screen_.setColumnCount(columnCount);

  if (deltaColumns > 0) {
    if (this.defaultTabStops)
      this.setDefaultTabStops(this.screenSize.width - deltaColumns);
  } else {
    for (var i = this.tabStops_.length - 1; i >= 0; i--) {
      if (this.tabStops_[i] < columnCount)
        break;

      this.tabStops_.pop();
    }
  }

  this.screen_.setColumnCount(this.screenSize.width);
};

/**
 * Deal with terminal height changes.
 *
 * This function does what needs to be done when the terminal height changes
 * out from under us.  It happens here rather than in onResize_() because this
 * code may need to run synchronously to handle programmatic changes of
 * terminal height.
 *
 * Relying on the browser to send us an async resize event means we may not be
 * in the correct state yet when the next escape sequence hits.
 *
 * @param {number} rowCount The number of rows.
 */
hterm.Terminal.prototype.realizeHeight_ = function(rowCount) {
  if (rowCount <= 0)
    throw new Error('Attempt to realize bad height: ' + rowCount);

  var deltaRows = rowCount - this.screen_.getHeight();

  this.screenSize.height = rowCount;

  var cursor = this.saveCursor();

  if (deltaRows < 0) {
    // Screen got smaller.
    deltaRows *= -1;
    while (deltaRows) {
      var lastRow = this.getRowCount() - 1;
      if (lastRow - this.scrollbackRows_.length == cursor.row)
        break;

      if (this.getRowText(lastRow))
        break;

      this.screen_.popRow();
      deltaRows--;
    }

    var ary = this.screen_.shiftRows(deltaRows);
    this.scrollbackRows_.push.apply(this.scrollbackRows_, ary);

    // We just removed rows from the top of the screen, we need to update
    // the cursor to match.
    cursor.row = Math.max(cursor.row - deltaRows, 0);
  } else if (deltaRows > 0) {
    // Screen got larger.

    if (deltaRows <= this.scrollbackRows_.length) {
      var scrollbackCount = Math.min(deltaRows, this.scrollbackRows_.length);
      var rows = this.scrollbackRows_.splice(
          this.scrollbackRows_.length - scrollbackCount, scrollbackCount);
      this.screen_.unshiftRows(rows);
      deltaRows -= scrollbackCount;
      cursor.row += scrollbackCount;
    }

    if (deltaRows)
      this.appendRows_(deltaRows);
  }

  this.setVTScrollRegion(null, null);
  this.restoreCursor(cursor);
};

/**
 * Scroll the terminal to the top of the scrollback buffer.
 */
hterm.Terminal.prototype.scrollHome = function() {
  this.scrollPort_.scrollRowToTop(0);
};

/**
 * Scroll the terminal to the end.
 */
hterm.Terminal.prototype.scrollEnd = function() {
  this.scrollPort_.scrollRowToBottom(this.getRowCount());
};

/**
 * Scroll the terminal one page up (minus one line) relative to the current
 * position.
 */
hterm.Terminal.prototype.scrollPageUp = function() {
  var i = this.scrollPort_.getTopRowIndex();
  this.scrollPort_.scrollRowToTop(i - this.screenSize.height + 1);
};

/**
 * Scroll the terminal one page down (minus one line) relative to the current
 * position.
 */
hterm.Terminal.prototype.scrollPageDown = function() {
  var i = this.scrollPort_.getTopRowIndex();
  this.scrollPort_.scrollRowToTop(i + this.screenSize.height - 1);
};

/**
 * Clear primary screen, secondary screen, and the scrollback buffer.
 */
hterm.Terminal.prototype.wipeContents = function() {
  this.scrollbackRows_.length = 0;
  this.scrollPort_.resetCache();

  [this.primaryScreen_, this.alternateScreen_].forEach(function(screen) {
    var bottom = screen.getHeight();
    if (bottom > 0) {
      this.renumberRows_(0, bottom);
      this.clearHome(screen);
    }
  }.bind(this));

  this.syncCursorPosition_();
  this.scrollPort_.invalidate();
};

/**
 * Full terminal reset.
 */
hterm.Terminal.prototype.reset = function() {
  this.clearAllTabStops();
  this.setDefaultTabStops();

  this.clearHome(this.primaryScreen_);
  this.primaryScreen_.textAttributes.reset();

  this.clearHome(this.alternateScreen_);
  this.alternateScreen_.textAttributes.reset();

  this.setCursorBlink(!!this.prefs_.get('cursor-blink'));

  this.vt.reset();

  this.softReset();
};

/**
 * Soft terminal reset.
 *
 * Perform a soft reset to the default values listed in
 * http://www.vt100.net/docs/vt510-rm/DECSTR#T5-9
 */
hterm.Terminal.prototype.softReset = function() {
  // Reset terminal options to their default values.
  this.options_ = new hterm.Options();

  // We show the cursor on soft reset but do not alter the blink state.
  this.options_.cursorBlink = !!this.timeouts_.cursorBlink;

  // Xterm also resets the color palette on soft reset, even though it doesn't
  // seem to be documented anywhere.
  this.primaryScreen_.textAttributes.resetColorPalette();
  this.alternateScreen_.textAttributes.resetColorPalette();

  // The xterm man page explicitly says this will happen on soft reset.
  this.setVTScrollRegion(null, null);

  // Xterm also shows the cursor on soft reset, but does not alter the blink
  // state.
  this.setCursorVisible(true);
};

/**
 * Move the cursor forward to the next tab stop, or to the last column
 * if no more tab stops are set.
 */
hterm.Terminal.prototype.forwardTabStop = function() {
  var column = this.screen_.cursorPosition.column;

  for (var i = 0; i < this.tabStops_.length; i++) {
    if (this.tabStops_[i] > column) {
      this.setCursorColumn(this.tabStops_[i]);
      return;
    }
  }

  // xterm does not clear the overflow flag on HT or CHT.
  var overflow = this.screen_.cursorPosition.overflow;
  this.setCursorColumn(this.screenSize.width - 1);
  this.screen_.cursorPosition.overflow = overflow;
};

/**
 * Move the cursor backward to the previous tab stop, or to the first column
 * if no previous tab stops are set.
 */
hterm.Terminal.prototype.backwardTabStop = function() {
  var column = this.screen_.cursorPosition.column;

  for (var i = this.tabStops_.length - 1; i >= 0; i--) {
    if (this.tabStops_[i] < column) {
      this.setCursorColumn(this.tabStops_[i]);
      return;
    }
  }

  this.setCursorColumn(1);
};

/**
 * Set a tab stop at the given column.
 *
 * @param {integer} column Zero based column.
 */
hterm.Terminal.prototype.setTabStop = function(column) {
  for (var i = this.tabStops_.length - 1; i >= 0; i--) {
    if (this.tabStops_[i] == column)
      return;

    if (this.tabStops_[i] < column) {
      this.tabStops_.splice(i + 1, 0, column);
      return;
    }
  }

  this.tabStops_.splice(0, 0, column);
};

/**
 * Clear the tab stop at the current cursor position.
 *
 * No effect if there is no tab stop at the current cursor position.
 */
hterm.Terminal.prototype.clearTabStopAtCursor = function() {
  var column = this.screen_.cursorPosition.column;

  var i = this.tabStops_.indexOf(column);
  if (i == -1)
    return;

  this.tabStops_.splice(i, 1);
};

/**
 * Clear all tab stops.
 */
hterm.Terminal.prototype.clearAllTabStops = function() {
  this.tabStops_.length = 0;
  this.defaultTabStops = false;
};

/**
 * Set up the default tab stops, starting from a given column.
 *
 * This sets a tabstop every (column % this.tabWidth) column, starting
 * from the specified column, or 0 if no column is provided.  It also flags
 * future resizes to set them up.
 *
 * This does not clear the existing tab stops first, use clearAllTabStops
 * for that.
 *
 * @param {integer} opt_start Optional starting zero based starting column, useful
 *     for filling out missing tab stops when the terminal is resized.
 */
hterm.Terminal.prototype.setDefaultTabStops = function(opt_start) {
  var start = opt_start || 0;
  var w = this.tabWidth;
  // Round start up to a default tab stop.
  start = start - 1 - ((start - 1) % w) + w;
  for (var i = start; i < this.screenSize.width; i += w) {
    this.setTabStop(i);
  }

  this.defaultTabStops = true;
};

/**
 * Interpret a sequence of characters.
 *
 * Incomplete escape sequences are buffered until the next call.
 *
 * @param {string} str Sequence of characters to interpret or pass through.
 */
hterm.Terminal.prototype.interpret = function(str) {
  this.vt.interpret(str);
  this.scheduleSyncCursorPosition_();
};

/**
 * Take over the given DIV for use as the terminal display.
 *
 * @param {HTMLDivElement} div The div to use as the terminal display.
 */
hterm.Terminal.prototype.decorate = function(div) {
  this.div_ = div;

  this.scrollPort_.decorate(div);
  this.scrollPort_.setBackgroundImage(this.prefs_.get('background-image'));
  this.scrollPort_.setBackgroundSize(this.prefs_.get('background-size'));
  this.scrollPort_.setBackgroundPosition(
      this.prefs_.get('background-position'));
  this.scrollPort_.setUserCss(this.prefs_.get('user-css'));

  this.div_.focus = this.focus.bind(this);

  this.setFontSize(this.prefs_.get('font-size'));
  this.syncFontFamily();

  this.setScrollbarVisible(this.prefs_.get('scrollbar-visible'));
  this.setScrollWheelMoveMultipler(
      this.prefs_.get('scroll-wheel-move-multiplier'));

  this.document_ = this.scrollPort_.getDocument();

  this.document_.body.oncontextmenu = function() { return false; };

  var onMouse = this.onMouse_.bind(this);
  var screenNode = this.scrollPort_.getScreenNode();
  screenNode.addEventListener('mousedown', onMouse);
  screenNode.addEventListener('mouseup', onMouse);
  screenNode.addEventListener('mousemove', onMouse);
  this.scrollPort_.onScrollWheel = onMouse;

  screenNode.addEventListener(
      'focus', this.onFocusChange_.bind(this, true));
  // Listen for mousedown events on the screenNode as in FF the focus
  // events don't bubble.
  screenNode.addEventListener('mousedown', function() {
    setTimeout(this.onFocusChange_.bind(this, true));
  }.bind(this));

  screenNode.addEventListener(
      'blur', this.onFocusChange_.bind(this, false));

  var style = this.document_.createElement('style');
  style.textContent =
      ('.cursor-node[focus="false"] {' +
       '  box-sizing: border-box;' +
       '  background-color: transparent !important;' +
       '  border-width: 2px;' +
       '  border-style: solid;' +
       '}' +
       '.wc-node {' +
       '  display: inline-block;' +
       '  text-align: center;' +
       '  width: ' + this.scrollPort_.characterSize.width * 2 + 'px;' +
       '}' +
       ':root {' +
       '  --hterm-blink-node-duration: 0.7s;' +
       '}' +
       '@keyframes blink {' +
       '  from { opacity: 1.0; }' +
       '  to { opacity: 0.0; }' +
       '}' +
       '.blink-node {' +
       '  animation-name: blink;' +
       '  animation-duration: var(--hterm-blink-node-duration);' +
       '  animation-iteration-count: infinite;' +
       '  animation-timing-function: ease-in-out;' +
       '  animation-direction: alternate;' +
       '}');
  this.document_.head.appendChild(style);

  var styleSheets = this.document_.styleSheets;
  var cssRules = styleSheets[styleSheets.length - 1].cssRules;
  this.wcCssRule_ = cssRules[cssRules.length - 1];

  this.cursorNode_ = this.document_.createElement('div');
  this.cursorNode_.className = 'cursor-node';
  this.cursorNode_.style.cssText =
      ('position: absolute;' +
       'top: -99px;' +
       'display: block;' +
       'width: ' + this.scrollPort_.characterSize.width + 'px;' +
       'height: ' + this.scrollPort_.characterSize.height + 'px;' +
       '-webkit-transition: opacity, background-color 100ms linear;' +
       '-moz-transition: opacity, background-color 100ms linear;');

  this.setCursorColor(this.prefs_.get('cursor-color'));
  this.setCursorBlink(!!this.prefs_.get('cursor-blink'));
  this.restyleCursor_();

  this.document_.body.appendChild(this.cursorNode_);

  // When 'enableMouseDragScroll' is off we reposition this element directly
  // under the mouse cursor after a click.  This makes Chrome associate
  // subsequent mousemove events with the scroll-blocker.  Since the
  // scroll-blocker is a peer (not a child) of the scrollport, the mousemove
  // events do not cause the scrollport to scroll.
  //
  // It's a hack, but it's the cleanest way I could find.
  this.scrollBlockerNode_ = this.document_.createElement('div');
  this.scrollBlockerNode_.style.cssText =
      ('position: absolute;' +
       'top: -99px;' +
       'display: block;' +
       'width: 10px;' +
       'height: 10px;');
  this.document_.body.appendChild(this.scrollBlockerNode_);

  this.scrollPort_.onScrollWheel = onMouse;
  ['mousedown', 'mouseup', 'mousemove', 'click', 'dblclick',
   ].forEach(function(event) {
       this.scrollBlockerNode_.addEventListener(event, onMouse);
       this.cursorNode_.addEventListener(event, onMouse);
       this.document_.addEventListener(event, onMouse);
     }.bind(this));

  this.cursorNode_.addEventListener('mousedown', function() {
      setTimeout(this.focus.bind(this));
    }.bind(this));

  this.setReverseVideo(false);

  this.scrollPort_.focus();
  this.scrollPort_.scheduleRedraw();
};

/**
 * Return the HTML document that contains the terminal DOM nodes.
 *
 * @return {HTMLDocument}
 */
hterm.Terminal.prototype.getDocument = function() {
  return this.document_;
};

/**
 * Focus the terminal.
 */
hterm.Terminal.prototype.focus = function() {
  this.scrollPort_.focus();
};

/**
 * Return the HTML Element for a given row index.
 *
 * This is a method from the RowProvider interface.  The ScrollPort uses
 * it to fetch rows on demand as they are scrolled into view.
 *
 * TODO(rginda): Consider saving scrollback rows as (HTML source, text content)
 * pairs to conserve memory.
 *
 * @param {integer} index The zero-based row index, measured relative to the
 *     start of the scrollback buffer.  On-screen rows will always have the
 *     largest indices.
 * @return {HTMLElement} The 'x-row' element containing for the requested row.
 */
hterm.Terminal.prototype.getRowNode = function(index) {
  if (index < this.scrollbackRows_.length)
    return this.scrollbackRows_[index];

  var screenIndex = index - this.scrollbackRows_.length;
  return this.screen_.rowsArray[screenIndex];
};

/**
 * Return the text content for a given range of rows.
 *
 * This is a method from the RowProvider interface.  The ScrollPort uses
 * it to fetch text content on demand when the user attempts to copy their
 * selection to the clipboard.
 *
 * @param {integer} start The zero-based row index to start from, measured
 *     relative to the start of the scrollback buffer.  On-screen rows will
 *     always have the largest indices.
 * @param {integer} end The zero-based row index to end on, measured
 *     relative to the start of the scrollback buffer.
 * @return {string} A single string containing the text value of the range of
 *     rows.  Lines will be newline delimited, with no trailing newline.
 */
hterm.Terminal.prototype.getRowsText = function(start, end) {
  var ary = [];
  for (var i = start; i < end; i++) {
    var node = this.getRowNode(i);
    ary.push(node.textContent);
    if (i < end - 1 && !node.getAttribute('line-overflow'))
      ary.push('\n');
  }

  return ary.join('');
};

/**
 * Return the text content for a given row.
 *
 * This is a method from the RowProvider interface.  The ScrollPort uses
 * it to fetch text content on demand when the user attempts to copy their
 * selection to the clipboard.
 *
 * @param {integer} index The zero-based row index to return, measured
 *     relative to the start of the scrollback buffer.  On-screen rows will
 *     always have the largest indices.
 * @return {string} A string containing the text value of the selected row.
 */
hterm.Terminal.prototype.getRowText = function(index) {
  var node = this.getRowNode(index);
  return node.textContent;
};

/**
 * Return the total number of rows in the addressable screen and in the
 * scrollback buffer of this terminal.
 *
 * This is a method from the RowProvider interface.  The ScrollPort uses
 * it to compute the size of the scrollbar.
 *
 * @return {integer} The number of rows in this terminal.
 */
hterm.Terminal.prototype.getRowCount = function() {
  return this.scrollbackRows_.length + this.screen_.rowsArray.length;
};

/**
 * Create DOM nodes for new rows and append them to the end of the terminal.
 *
 * This is the only correct way to add a new DOM node for a row.  Notice that
 * the new row is appended to the bottom of the list of rows, and does not
 * require renumbering (of the rowIndex property) of previous rows.
 *
 * If you think you want a new blank row somewhere in the middle of the
 * terminal, look into moveRows_().
 *
 * This method does not pay attention to vtScrollTop/Bottom, since you should
 * be using moveRows() in cases where they would matter.
 *
 * The cursor will be positioned at column 0 of the first inserted line.
 *
 * @param {number} count The number of rows to created.
 */
hterm.Terminal.prototype.appendRows_ = function(count) {
  var cursorRow = this.screen_.rowsArray.length;
  var offset = this.scrollbackRows_.length + cursorRow;
  for (var i = 0; i < count; i++) {
    var row = this.document_.createElement('x-row');
    row.appendChild(this.document_.createTextNode(''));
    row.rowIndex = offset + i;
    this.screen_.pushRow(row);
  }

  var extraRows = this.screen_.rowsArray.length - this.screenSize.height;
  if (extraRows > 0) {
    var ary = this.screen_.shiftRows(extraRows);
    Array.prototype.push.apply(this.scrollbackRows_, ary);
    if (this.scrollPort_.isScrolledEnd)
      this.scheduleScrollDown_();
  }

  if (cursorRow >= this.screen_.rowsArray.length)
    cursorRow = this.screen_.rowsArray.length - 1;

  this.setAbsoluteCursorPosition(cursorRow, 0);
};

/**
 * Relocate rows from one part of the addressable screen to another.
 *
 * This is used to recycle rows during VT scrolls (those which are driven
 * by VT commands, rather than by the user manipulating the scrollbar.)
 *
 * In this case, the blank lines scrolled into the scroll region are made of
 * the nodes we scrolled off.  These have their rowIndex properties carefully
 * renumbered so as not to confuse the ScrollPort.
 *
 * @param {number} fromIndex The start index.
 * @param {number} count The number of rows to move.
 * @param {number} toIndex The destination index.
 */
hterm.Terminal.prototype.moveRows_ = function(fromIndex, count, toIndex) {
  var ary = this.screen_.removeRows(fromIndex, count);
  this.screen_.insertRows(toIndex, ary);

  var start, end;
  if (fromIndex < toIndex) {
    start = fromIndex;
    end = toIndex + count;
  } else {
    start = toIndex;
    end = fromIndex + count;
  }

  this.renumberRows_(start, end);
  this.scrollPort_.scheduleInvalidate();
};

/**
 * Renumber the rowIndex property of the given range of rows.
 *
 * The start and end indices are relative to the screen, not the scrollback.
 * Rows in the scrollback buffer cannot be renumbered.  Since they are not
 * addressable (you can't delete them, scroll them, etc), you should have
 * no need to renumber scrollback rows.
 *
 * @param {number} start The start index.
 * @param {number} end The end index.
 * @param {hterm.Screen} opt_screen The screen to renumber.
 */
hterm.Terminal.prototype.renumberRows_ = function(start, end, opt_screen) {
  var screen = opt_screen || this.screen_;

  var offset = this.scrollbackRows_.length;
  for (var i = start; i < end; i++) {
    screen.rowsArray[i].rowIndex = offset + i;
  }
};

/**
 * Print a string to the terminal.
 *
 * This respects the current insert and wraparound modes.  It will add new lines
 * to the end of the terminal, scrolling off the top into the scrollback buffer
 * if necessary.
 *
 * The string is *not* parsed for escape codes.  Use the interpret() method if
 * that's what you're after.
 *
 * @param{string} str The string to print.
 */
hterm.Terminal.prototype.print = function(str) {
  var startOffset = 0;

  var strWidth = lib.wc.strWidth(str);

  while (startOffset < strWidth) {
    if (this.options_.wraparound && this.screen_.cursorPosition.overflow) {
      this.screen_.commitLineOverflow();
      this.newLine();
    }

    var count = strWidth - startOffset;
    var didOverflow = false;
    var substr;

    if (this.screen_.cursorPosition.column + count >= this.screenSize.width) {
      didOverflow = true;
      count = this.screenSize.width - this.screen_.cursorPosition.column;
    }

    if (didOverflow && !this.options_.wraparound) {
      // If the string overflowed the line but wraparound is off, then the
      // last printed character should be the last of the string.
      // TODO: This will add to our problems with multibyte UTF-16 characters.
      substr = lib.wc.substr(str, startOffset, count - 1) +
          lib.wc.substr(str, strWidth - 1);
      count = strWidth;
    } else {
      substr = lib.wc.substr(str, startOffset, count);
    }

    var tokens = hterm.TextAttributes.splitWidecharString(substr);
    for (var i = 0; i < tokens.length; i++) {
      if (tokens[i].wcNode)
        this.screen_.textAttributes.wcNode = true;

      if (this.options_.insertMode) {
          this.screen_.insertString(tokens[i].str);
      } else {
        this.screen_.overwriteString(tokens[i].str);
      }
      this.screen_.textAttributes.wcNode = false;
    }

    this.screen_.maybeClipCurrentRow();
    startOffset += count;
  }

  this.scheduleSyncCursorPosition_();

  if (this.scrollOnOutput_)
    this.scrollPort_.scrollRowToBottom(this.getRowCount());
};

/**
 * Set the VT scroll region.
 *
 * This also resets the cursor position to the absolute (0, 0) position, since
 * that's what xterm appears to do.
 *
 * Setting the scroll region to the full height of the terminal will clear
 * the scroll region.  This is *NOT* what most terminals do.  We're explicitly
 * going "off-spec" here because it makes `screen` and `tmux` overflow into the
 * local scrollback buffer, which means the scrollbars and shift-pgup/pgdn
 * continue to work as most users would expect.
 *
 * @param {integer} scrollTop The zero-based top of the scroll region.
 * @param {integer} scrollBottom The zero-based bottom of the scroll region,
 *     inclusive.
 */
hterm.Terminal.prototype.setVTScrollRegion = function(scrollTop, scrollBottom) {
  if (scrollTop == 0 && scrollBottom == this.screenSize.height - 1) {
    this.vtScrollTop_ = null;
    this.vtScrollBottom_ = null;
  } else {
    this.vtScrollTop_ = scrollTop;
    this.vtScrollBottom_ = scrollBottom;
  }
};

/**
 * Return the top row index according to the VT.
 *
 * This will return 0 unless the terminal has been told to restrict scrolling
 * to some lower row.  It is used for some VT cursor positioning and scrolling
 * commands.
 *
 * @return {integer} The topmost row in the terminal's scroll region.
 */
hterm.Terminal.prototype.getVTScrollTop = function() {
  if (this.vtScrollTop_ != null)
    return this.vtScrollTop_;

  return 0;
};

/**
 * Return the bottom row index according to the VT.
 *
 * This will return the height of the terminal unless the it has been told to
 * restrict scrolling to some higher row.  It is used for some VT cursor
 * positioning and scrolling commands.
 *
 * @return {integer} The bottom most row in the terminal's scroll region.
 */
hterm.Terminal.prototype.getVTScrollBottom = function() {
  if (this.vtScrollBottom_ != null)
    return this.vtScrollBottom_;

  return this.screenSize.height - 1;
}

/**
 * Process a '\n' character.
 *
 * If the cursor is on the final row of the terminal this will append a new
 * blank row to the screen and scroll the topmost row into the scrollback
 * buffer.
 *
 * Otherwise, this moves the cursor to column zero of the next row.
 */
hterm.Terminal.prototype.newLine = function() {
  var cursorAtEndOfScreen = (this.screen_.cursorPosition.row ==
                             this.screen_.rowsArray.length - 1);

  if (this.vtScrollBottom_ != null) {
    // A VT Scroll region is active, we never append new rows.
    if (this.screen_.cursorPosition.row == this.vtScrollBottom_) {
      // We're at the end of the VT Scroll Region, perform a VT scroll.
      this.vtScrollUp(1);
      this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, 0);
    } else if (cursorAtEndOfScreen) {
      // We're at the end of the screen, the only thing to do is put the
      // cursor to column 0.
      this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, 0);
    } else {
      // Anywhere else, advance the cursor row, and reset the column.
      this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row + 1, 0);
    }
  } else if (cursorAtEndOfScreen) {
    // We're at the end of the screen.  Append a new row to the terminal,
    // shifting the top row into the scrollback.
    this.appendRows_(1);
  } else {
    // Anywhere else in the screen just moves the cursor.
    this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row + 1, 0);
  }
};

/**
 * Like newLine(), except maintain the cursor column.
 */
hterm.Terminal.prototype.lineFeed = function() {
  var column = this.screen_.cursorPosition.column;
  this.newLine();
  this.setCursorColumn(column);
};

/**
 * If autoCarriageReturn is set then newLine(), else lineFeed().
 */
hterm.Terminal.prototype.formFeed = function() {
  if (this.options_.autoCarriageReturn) {
    this.newLine();
  } else {
    this.lineFeed();
  }
};

/**
 * Move the cursor up one row, possibly inserting a blank line.
 *
 * The cursor column is not changed.
 */
hterm.Terminal.prototype.reverseLineFeed = function() {
  var scrollTop = this.getVTScrollTop();
  var currentRow = this.screen_.cursorPosition.row;

  if (currentRow == scrollTop) {
    this.insertLines(1);
  } else {
    this.setAbsoluteCursorRow(currentRow - 1);
  }
};

/**
 * Replace all characters to the left of the current cursor with the space
 * character.
 *
 * TODO(rginda): This should probably *remove* the characters (not just replace
 * with a space) if there are no characters at or beyond the current cursor
 * position.
 */
hterm.Terminal.prototype.eraseToLeft = function() {
  var cursor = this.saveCursor();
  this.setCursorColumn(0);
  this.screen_.overwriteString(lib.f.getWhitespace(cursor.column + 1));
  this.restoreCursor(cursor);
};

/**
 * Erase a given number of characters to the right of the cursor.
 *
 * The cursor position is unchanged.
 *
 * If the current background color is not the default background color this
 * will insert spaces rather than delete.  This is unfortunate because the
 * trailing space will affect text selection, but it's difficult to come up
 * with a way to style empty space that wouldn't trip up the hterm.Screen
 * code.
 *
 * eraseToRight is ignored in the presence of a cursor overflow.  This deviates
 * from xterm, but agrees with gnome-terminal and konsole, xfce4-terminal.  See
 * crbug.com/232390 for details.
 *
 * @param {number} opt_count The number of characters to erase.
 */
hterm.Terminal.prototype.eraseToRight = function(opt_count) {
  if (this.screen_.cursorPosition.overflow)
    return;

  var maxCount = this.screenSize.width - this.screen_.cursorPosition.column;
  var count = opt_count ? Math.min(opt_count, maxCount) : maxCount;

  if (this.screen_.textAttributes.background ===
      this.screen_.textAttributes.DEFAULT_COLOR) {
    var cursorRow = this.screen_.rowsArray[this.screen_.cursorPosition.row];
    if (hterm.TextAttributes.nodeWidth(cursorRow) <=
        this.screen_.cursorPosition.column + count) {
      this.screen_.deleteChars(count);
      this.clearCursorOverflow();
      return;
    }
  }

  var cursor = this.saveCursor();
  this.screen_.overwriteString(lib.f.getWhitespace(count));
  this.restoreCursor(cursor);
  this.clearCursorOverflow();
};

/**
 * Erase the current line.
 *
 * The cursor position is unchanged.
 */
hterm.Terminal.prototype.eraseLine = function() {
  var cursor = this.saveCursor();
  this.screen_.clearCursorRow();
  this.restoreCursor(cursor);
  this.clearCursorOverflow();
};

/**
 * Erase all characters from the start of the screen to the current cursor
 * position, regardless of scroll region.
 *
 * The cursor position is unchanged.
 */
hterm.Terminal.prototype.eraseAbove = function() {
  var cursor = this.saveCursor();

  this.eraseToLeft();

  for (var i = 0; i < cursor.row; i++) {
    this.setAbsoluteCursorPosition(i, 0);
    this.screen_.clearCursorRow();
  }

  this.restoreCursor(cursor);
  this.clearCursorOverflow();
};

/**
 * Erase all characters from the current cursor position to the end of the
 * screen, regardless of scroll region.
 *
 * The cursor position is unchanged.
 */
hterm.Terminal.prototype.eraseBelow = function() {
  var cursor = this.saveCursor();

  this.eraseToRight();

  var bottom = this.screenSize.height - 1;
  for (var i = cursor.row + 1; i <= bottom; i++) {
    this.setAbsoluteCursorPosition(i, 0);
    this.screen_.clearCursorRow();
  }

  this.restoreCursor(cursor);
  this.clearCursorOverflow();
};

/**
 * Fill the terminal with a given character.
 *
 * This methods does not respect the VT scroll region.
 *
 * @param {string} ch The character to use for the fill.
 */
hterm.Terminal.prototype.fill = function(ch) {
  var cursor = this.saveCursor();

  this.setAbsoluteCursorPosition(0, 0);
  for (var row = 0; row < this.screenSize.height; row++) {
    for (var col = 0; col < this.screenSize.width; col++) {
      this.setAbsoluteCursorPosition(row, col);
      this.screen_.overwriteString(ch);
    }
  }

  this.restoreCursor(cursor);
};

/**
 * Erase the entire display and leave the cursor at (0, 0).
 *
 * This does not respect the scroll region.
 *
 * @param {hterm.Screen} opt_screen Optional screen to operate on.  Defaults
 *     to the current screen.
 */
hterm.Terminal.prototype.clearHome = function(opt_screen) {
  var screen = opt_screen || this.screen_;
  var bottom = screen.getHeight();

  if (bottom == 0) {
    // Empty screen, nothing to do.
    return;
  }

  for (var i = 0; i < bottom; i++) {
    screen.setCursorPosition(i, 0);
    screen.clearCursorRow();
  }

  screen.setCursorPosition(0, 0);
};

/**
 * Erase the entire display without changing the cursor position.
 *
 * The cursor position is unchanged.  This does not respect the scroll
 * region.
 *
 * @param {hterm.Screen} opt_screen Optional screen to operate on.  Defaults
 *     to the current screen.
 */
hterm.Terminal.prototype.clear = function(opt_screen) {
  var screen = opt_screen || this.screen_;
  var cursor = screen.cursorPosition.clone();
  this.clearHome(screen);
  screen.setCursorPosition(cursor.row, cursor.column);
};

/**
 * VT command to insert lines at the current cursor row.
 *
 * This respects the current scroll region.  Rows pushed off the bottom are
 * lost (they won't show up in the scrollback buffer).
 *
 * @param {integer} count The number of lines to insert.
 */
hterm.Terminal.prototype.insertLines = function(count) {
  var cursorRow = this.screen_.cursorPosition.row;

  var bottom = this.getVTScrollBottom();
  count = Math.min(count, bottom - cursorRow);

  // The moveCount is the number of rows we need to relocate to make room for
  // the new row(s).  The count is the distance to move them.
  var moveCount = bottom - cursorRow - count + 1;
  if (moveCount)
    this.moveRows_(cursorRow, moveCount, cursorRow + count);

  for (var i = count - 1; i >= 0; i--) {
    this.setAbsoluteCursorPosition(cursorRow + i, 0);
    this.screen_.clearCursorRow();
  }
};

/**
 * VT command to delete lines at the current cursor row.
 *
 * New rows are added to the bottom of scroll region to take their place.  New
 * rows are strictly there to take up space and have no content or style.
 *
 * @param {number} count The number of lines to delete.
 */
hterm.Terminal.prototype.deleteLines = function(count) {
  var cursor = this.saveCursor();

  var top = cursor.row;
  var bottom = this.getVTScrollBottom();

  var maxCount = bottom - top + 1;
  count = Math.min(count, maxCount);

  var moveStart = bottom - count + 1;
  if (count != maxCount)
    this.moveRows_(top, count, moveStart);

  for (var i = 0; i < count; i++) {
    this.setAbsoluteCursorPosition(moveStart + i, 0);
    this.screen_.clearCursorRow();
  }

  this.restoreCursor(cursor);
  this.clearCursorOverflow();
};

/**
 * Inserts the given number of spaces at the current cursor position.
 *
 * The cursor position is not changed.
 *
 * @param {number} count The number of spaces to insert.
 */
hterm.Terminal.prototype.insertSpace = function(count) {
  var cursor = this.saveCursor();

  var ws = lib.f.getWhitespace(count || 1);
  this.screen_.insertString(ws);
  this.screen_.maybeClipCurrentRow();

  this.restoreCursor(cursor);
  this.clearCursorOverflow();
};

/**
 * Forward-delete the specified number of characters starting at the cursor
 * position.
 *
 * @param {integer} count The number of characters to delete.
 */
hterm.Terminal.prototype.deleteChars = function(count) {
  var deleted = this.screen_.deleteChars(count);
  if (deleted && !this.screen_.textAttributes.isDefault()) {
    var cursor = this.saveCursor();
    this.setCursorColumn(this.screenSize.width - deleted);
    this.screen_.insertString(lib.f.getWhitespace(deleted));
    this.restoreCursor(cursor);
  }

  this.clearCursorOverflow();
};

/**
 * Shift rows in the scroll region upwards by a given number of lines.
 *
 * New rows are inserted at the bottom of the scroll region to fill the
 * vacated rows.  The new rows not filled out with the current text attributes.
 *
 * This function does not affect the scrollback rows at all.  Rows shifted
 * off the top are lost.
 *
 * The cursor position is not altered.
 *
 * @param {integer} count The number of rows to scroll.
 */
hterm.Terminal.prototype.vtScrollUp = function(count) {
  var cursor = this.saveCursor();

  this.setAbsoluteCursorRow(this.getVTScrollTop());
  this.deleteLines(count);

  this.restoreCursor(cursor);
};

/**
 * Shift rows below the cursor down by a given number of lines.
 *
 * This function respects the current scroll region.
 *
 * New rows are inserted at the top of the scroll region to fill the
 * vacated rows.  The new rows not filled out with the current text attributes.
 *
 * This function does not affect the scrollback rows at all.  Rows shifted
 * off the bottom are lost.
 *
 * @param {integer} count The number of rows to scroll.
 */
hterm.Terminal.prototype.vtScrollDown = function(opt_count) {
  var cursor = this.saveCursor();

  this.setAbsoluteCursorPosition(this.getVTScrollTop(), 0);
  this.insertLines(opt_count);

  this.restoreCursor(cursor);
};


/**
 * Set the cursor position.
 *
 * The cursor row is relative to the scroll region if the terminal has
 * 'origin mode' enabled, or relative to the addressable screen otherwise.
 *
 * @param {integer} row The new zero-based cursor row.
 * @param {integer} row The new zero-based cursor column.
 */
hterm.Terminal.prototype.setCursorPosition = function(row, column) {
  if (this.options_.originMode) {
    this.setRelativeCursorPosition(row, column);
  } else {
    this.setAbsoluteCursorPosition(row, column);
  }
};

/**
 * Move the cursor relative to its current position.
 *
 * @param {number} row
 * @param {number} column
 */
hterm.Terminal.prototype.setRelativeCursorPosition = function(row, column) {
  var scrollTop = this.getVTScrollTop();
  row = lib.f.clamp(row + scrollTop, scrollTop, this.getVTScrollBottom());
  column = lib.f.clamp(column, 0, this.screenSize.width - 1);
  this.screen_.setCursorPosition(row, column);
};

/**
 * Move the cursor to the specified position.
 *
 * @param {number} row
 * @param {number} column
 */
hterm.Terminal.prototype.setAbsoluteCursorPosition = function(row, column) {
  row = lib.f.clamp(row, 0, this.screenSize.height - 1);
  column = lib.f.clamp(column, 0, this.screenSize.width - 1);
  this.screen_.setCursorPosition(row, column);
};

/**
 * Set the cursor column.
 *
 * @param {integer} column The new zero-based cursor column.
 */
hterm.Terminal.prototype.setCursorColumn = function(column) {
  this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, column);
};

/**
 * Return the cursor column.
 *
 * @return {integer} The zero-based cursor column.
 */
hterm.Terminal.prototype.getCursorColumn = function() {
  return this.screen_.cursorPosition.column;
};

/**
 * Set the cursor row.
 *
 * The cursor row is relative to the scroll region if the terminal has
 * 'origin mode' enabled, or relative to the addressable screen otherwise.
 *
 * @param {integer} row The new cursor row.
 */
hterm.Terminal.prototype.setAbsoluteCursorRow = function(row) {
  this.setAbsoluteCursorPosition(row, this.screen_.cursorPosition.column);
};

/**
 * Return the cursor row.
 *
 * @return {integer} The zero-based cursor row.
 */
hterm.Terminal.prototype.getCursorRow = function() {
  return this.screen_.cursorPosition.row;
};

/**
 * Request that the ScrollPort redraw itself soon.
 *
 * The redraw will happen asynchronously, soon after the call stack winds down.
 * Multiple calls will be coalesced into a single redraw.
 */
hterm.Terminal.prototype.scheduleRedraw_ = function() {
  if (this.timeouts_.redraw)
    return;

  var self = this;
  this.timeouts_.redraw = setTimeout(function() {
      delete self.timeouts_.redraw;
      self.scrollPort_.redraw_();
    }, 0);
};

/**
 * Request that the ScrollPort be scrolled to the bottom.
 *
 * The scroll will happen asynchronously, soon after the call stack winds down.
 * Multiple calls will be coalesced into a single scroll.
 *
 * This affects the scrollbar position of the ScrollPort, and has nothing to
 * do with the VT scroll commands.
 */
hterm.Terminal.prototype.scheduleScrollDown_ = function() {
  if (this.timeouts_.scrollDown)
    return;

  var self = this;
  this.timeouts_.scrollDown = setTimeout(function() {
      delete self.timeouts_.scrollDown;
      self.scrollPort_.scrollRowToBottom(self.getRowCount());
    }, 10);
};

/**
 * Move the cursor up a specified number of rows.
 *
 * @param {integer} count The number of rows to move the cursor.
 */
hterm.Terminal.prototype.cursorUp = function(count) {
  return this.cursorDown(-(count || 1));
};

/**
 * Move the cursor down a specified number of rows.
 *
 * @param {integer} count The number of rows to move the cursor.
 */
hterm.Terminal.prototype.cursorDown = function(count) {
  count = count || 1;
  var minHeight = (this.options_.originMode ? this.getVTScrollTop() : 0);
  var maxHeight = (this.options_.originMode ? this.getVTScrollBottom() :
                   this.screenSize.height - 1);

  var row = lib.f.clamp(this.screen_.cursorPosition.row + count,
                        minHeight, maxHeight);
  this.setAbsoluteCursorRow(row);
};

/**
 * Move the cursor left a specified number of columns.
 *
 * If reverse wraparound mode is enabled and the previous row wrapped into
 * the current row then we back up through the wraparound as well.
 *
 * @param {integer} count The number of columns to move the cursor.
 */
hterm.Terminal.prototype.cursorLeft = function(count) {
  count = count || 1;

  if (count < 1)
    return;

  var currentColumn = this.screen_.cursorPosition.column;
  if (this.options_.reverseWraparound) {
    if (this.screen_.cursorPosition.overflow) {
      // If this cursor is in the right margin, consume one count to get it
      // back to the last column.  This only applies when we're in reverse
      // wraparound mode.
      count--;
      this.clearCursorOverflow();

      if (!count)
        return;
    }

    var newRow = this.screen_.cursorPosition.row;
    var newColumn = currentColumn - count;
    if (newColumn < 0) {
      newRow = newRow - Math.floor(count / this.screenSize.width) - 1;
      if (newRow < 0) {
        // xterm also wraps from row 0 to the last row.
        newRow = this.screenSize.height + newRow % this.screenSize.height;
      }
      newColumn = this.screenSize.width + newColumn % this.screenSize.width;
    }

    this.setCursorPosition(Math.max(newRow, 0), newColumn);

  } else {
    var newColumn = Math.max(currentColumn - count, 0);
    this.setCursorColumn(newColumn);
  }
};

/**
 * Move the cursor right a specified number of columns.
 *
 * @param {integer} count The number of columns to move the cursor.
 */
hterm.Terminal.prototype.cursorRight = function(count) {
  count = count || 1;

  if (count < 1)
    return;

  var column = lib.f.clamp(this.screen_.cursorPosition.column + count,
                           0, this.screenSize.width - 1);
  this.setCursorColumn(column);
};

/**
 * Reverse the foreground and background colors of the terminal.
 *
 * This only affects text that was drawn with no attributes.
 *
 * TODO(rginda): Test xterm to see if reverse is respected for text that has
 * been drawn with attributes that happen to coincide with the default
 * 'no-attribute' colors.  My guess is probably not.
 *
 * @param {boolean} state The state to set.
 */
hterm.Terminal.prototype.setReverseVideo = function(state) {
  this.options_.reverseVideo = state;
  if (state) {
    this.scrollPort_.setForegroundColor(this.prefs_.get('background-color'));
    this.scrollPort_.setBackgroundColor(this.prefs_.get('foreground-color'));
  } else {
    this.scrollPort_.setForegroundColor(this.prefs_.get('foreground-color'));
    this.scrollPort_.setBackgroundColor(this.prefs_.get('background-color'));
  }
};

/**
 * Ring the terminal bell.
 *
 * This will not play the bell audio more than once per second.
 */
hterm.Terminal.prototype.ringBell = function() {
  this.cursorNode_.style.backgroundColor =
      this.scrollPort_.getForegroundColor();

  var self = this;
  setTimeout(function() {
      self.cursorNode_.style.backgroundColor = self.prefs_.get('cursor-color');
    }, 200);

  // bellSquelchTimeout_ affects both audio and notification bells.
  if (this.bellSquelchTimeout_)
    return;

  if (this.bellAudio_.getAttribute('src')) {
    this.bellAudio_.play();
    this.bellSequelchTimeout_ = setTimeout(function() {
        delete this.bellSquelchTimeout_;
      }.bind(this), 500);
  } else {
    delete this.bellSquelchTimeout_;
  }

  if (this.desktopNotificationBell_ && !this.document_.hasFocus()) {
    var n = new Notification(
        lib.f.replaceVars(hterm.desktopNotificationTitle,
                          {'title': window.document.title || 'hterm'}));
    this.bellNotificationList_.push(n);
    // TODO: Should we try to raise the window here?
    n.onclick = function() { self.closeBellNotifications_(); };
  }
};

/**
 * Set the origin mode bit.
 *
 * If origin mode is on, certain VT cursor and scrolling commands measure their
 * row parameter relative to the VT scroll region.  Otherwise, row 0 corresponds
 * to the top of the addressable screen.
 *
 * Defaults to off.
 *
 * @param {boolean} state True to set origin mode, false to unset.
 */
hterm.Terminal.prototype.setOriginMode = function(state) {
  this.options_.originMode = state;
  this.setCursorPosition(0, 0);
};

/**
 * Set the insert mode bit.
 *
 * If insert mode is on, existing text beyond the cursor position will be
 * shifted right to make room for new text.  Otherwise, new text overwrites
 * any existing text.
 *
 * Defaults to off.
 *
 * @param {boolean} state True to set insert mode, false to unset.
 */
hterm.Terminal.prototype.setInsertMode = function(state) {
  this.options_.insertMode = state;
};

/**
 * Set the auto carriage return bit.
 *
 * If auto carriage return is on then a formfeed character is interpreted
 * as a newline, otherwise it's the same as a linefeed.  The difference boils
 * down to whether or not the cursor column is reset.
 *
 * @param {boolean} state The state to set.
 */
hterm.Terminal.prototype.setAutoCarriageReturn = function(state) {
  this.options_.autoCarriageReturn = state;
};

/**
 * Set the wraparound mode bit.
 *
 * If wraparound mode is on, certain VT commands will allow the cursor to wrap
 * to the start of the following row.  Otherwise, the cursor is clamped to the
 * end of the screen and attempts to write past it are ignored.
 *
 * Defaults to on.
 *
 * @param {boolean} state True to set wraparound mode, false to unset.
 */
hterm.Terminal.prototype.setWraparound = function(state) {
  this.options_.wraparound = state;
};

/**
 * Set the reverse-wraparound mode bit.
 *
 * If wraparound mode is off, certain VT commands will allow the cursor to wrap
 * to the end of the previous row.  Otherwise, the cursor is clamped to column
 * 0.
 *
 * Defaults to off.
 *
 * @param {boolean} state True to set reverse-wraparound mode, false to unset.
 */
hterm.Terminal.prototype.setReverseWraparound = function(state) {
  this.options_.reverseWraparound = state;
};

/**
 * Selects between the primary and alternate screens.
 *
 * If alternate mode is on, the alternate screen is active.  Otherwise the
 * primary screen is active.
 *
 * Swapping screens has no effect on the scrollback buffer.
 *
 * Each screen maintains its own cursor position.
 *
 * Defaults to off.
 *
 * @param {boolean} state True to set alternate mode, false to unset.
 */
hterm.Terminal.prototype.setAlternateMode = function(state) {
  var cursor = this.saveCursor();
  this.screen_ = state ? this.alternateScreen_ : this.primaryScreen_;

  if (this.screen_.rowsArray.length &&
      this.screen_.rowsArray[0].rowIndex != this.scrollbackRows_.length) {
    // If the screen changed sizes while we were away, our rowIndexes may
    // be incorrect.
    var offset = this.scrollbackRows_.length;
    var ary = this.screen_.rowsArray;
    for (var i = 0; i < ary.length; i++) {
      ary[i].rowIndex = offset + i;
    }
  }

  this.realizeWidth_(this.screenSize.width);
  this.realizeHeight_(this.screenSize.height);
  this.scrollPort_.syncScrollHeight();
  this.scrollPort_.invalidate();

  this.restoreCursor(cursor);
  this.scrollPort_.resize();
};

/**
 * Set the cursor-blink mode bit.
 *
 * If cursor-blink is on, the cursor will blink when it is visible.  Otherwise
 * a visible cursor does not blink.
 *
 * You should make sure to turn blinking off if you're going to dispose of a
 * terminal, otherwise you'll leak a timeout.
 *
 * Defaults to on.
 *
 * @param {boolean} state True to set cursor-blink mode, false to unset.
 */
hterm.Terminal.prototype.setCursorBlink = function(state) {
  this.options_.cursorBlink = state;

  if (!state && this.timeouts_.cursorBlink) {
    clearTimeout(this.timeouts_.cursorBlink);
    delete this.timeouts_.cursorBlink;
  }

  if (this.options_.cursorVisible)
    this.setCursorVisible(true);
};

/**
 * Set the cursor-visible mode bit.
 *
 * If cursor-visible is on, the cursor will be visible.  Otherwise it will not.
 *
 * Defaults to on.
 *
 * @param {boolean} state True to set cursor-visible mode, false to unset.
 */
hterm.Terminal.prototype.setCursorVisible = function(state) {
  this.options_.cursorVisible = state;

  if (!state) {
    if (this.timeouts_.cursorBlink) {
      clearTimeout(this.timeouts_.cursorBlink);
      delete this.timeouts_.cursorBlink;
    }
    this.cursorNode_.style.opacity = '0';
    return;
  }

  this.syncCursorPosition_();

  this.cursorNode_.style.opacity = '1';

  if (this.options_.cursorBlink) {
    if (this.timeouts_.cursorBlink)
      return;

    this.onCursorBlink_();
  } else {
    if (this.timeouts_.cursorBlink) {
      clearTimeout(this.timeouts_.cursorBlink);
      delete this.timeouts_.cursorBlink;
    }
  }
};

/**
 * Synchronizes the visible cursor and document selection with the current
 * cursor coordinates.
 */
hterm.Terminal.prototype.syncCursorPosition_ = function() {
  var topRowIndex = this.scrollPort_.getTopRowIndex();
  var bottomRowIndex = this.scrollPort_.getBottomRowIndex(topRowIndex);
  var cursorRowIndex = this.scrollbackRows_.length +
      this.screen_.cursorPosition.row;

  if (cursorRowIndex > bottomRowIndex) {
    // Cursor is scrolled off screen, move it outside of the visible area.
    this.cursorNode_.style.top = -this.scrollPort_.characterSize.height + 'px';
    return;
  }

  if (this.options_.cursorVisible &&
      this.cursorNode_.style.display == 'none') {
    // Re-display the terminal cursor if it was hidden by the mouse cursor.
    this.cursorNode_.style.display = '';
  }


  this.cursorNode_.style.top = this.scrollPort_.visibleRowTopMargin +
      this.scrollPort_.characterSize.height * (cursorRowIndex - topRowIndex) +
      'px';
  this.cursorNode_.style.left = this.scrollPort_.characterSize.width *
      this.screen_.cursorPosition.column + 'px';

  this.cursorNode_.setAttribute('title',
                                '(' + this.screen_.cursorPosition.row +
                                ', ' + this.screen_.cursorPosition.column +
                                ')');

  // Update the caret for a11y purposes.
  var selection = this.document_.getSelection();
  if (selection && selection.isCollapsed)
    this.screen_.syncSelectionCaret(selection);
};

/**
 * Adjusts the style of this.cursorNode_ according to the current cursor shape
 * and character cell dimensions.
 */
hterm.Terminal.prototype.restyleCursor_ = function() {
  var shape = this.cursorShape_;

  if (this.cursorNode_.getAttribute('focus') == 'false') {
    // Always show a block cursor when unfocused.
    shape = hterm.Terminal.cursorShape.BLOCK;
  }

  var style = this.cursorNode_.style;

  style.width = this.scrollPort_.characterSize.width + 'px';

  switch (shape) {
    case hterm.Terminal.cursorShape.BEAM:
      style.height = this.scrollPort_.characterSize.height + 'px';
      style.backgroundColor = 'transparent';
      style.borderBottomStyle = null;
      style.borderLeftStyle = 'solid';
      break;

    case hterm.Terminal.cursorShape.UNDERLINE:
      style.height = this.scrollPort_.characterSize.baseline + 'px';
      style.backgroundColor = 'transparent';
      style.borderBottomStyle = 'solid';
      // correct the size to put it exactly at the baseline
      style.borderLeftStyle = null;
      break;

    default:
      style.height = this.scrollPort_.characterSize.height + 'px';
      style.backgroundColor = this.cursorColor_;
      style.borderBottomStyle = null;
      style.borderLeftStyle = null;
      break;
  }
};

/**
 * Synchronizes the visible cursor with the current cursor coordinates.
 *
 * The sync will happen asynchronously, soon after the call stack winds down.
 * Multiple calls will be coalesced into a single sync.
 */
hterm.Terminal.prototype.scheduleSyncCursorPosition_ = function() {
  if (this.timeouts_.syncCursor)
    return;

  var self = this;
  this.timeouts_.syncCursor = setTimeout(function() {
      self.syncCursorPosition_();
      delete self.timeouts_.syncCursor;
    }, 0);
};

/**
 * Show or hide the zoom warning.
 *
 * The zoom warning is a message warning the user that their browser zoom must
 * be set to 100% in order for hterm to function properly.
 *
 * @param {boolean} state True to show the message, false to hide it.
 */
hterm.Terminal.prototype.showZoomWarning_ = function(state) {
  if (!this.zoomWarningNode_) {
    if (!state)
      return;

    this.zoomWarningNode_ = this.document_.createElement('div');
    this.zoomWarningNode_.style.cssText = (
        'color: black;' +
        'background-color: #ff2222;' +
        'font-size: large;' +
        'border-radius: 8px;' +
        'opacity: 0.75;' +
        'padding: 0.2em 0.5em 0.2em 0.5em;' +
        'top: 0.5em;' +
        'right: 1.2em;' +
        'position: absolute;' +
        '-webkit-text-size-adjust: none;' +
        '-webkit-user-select: none;' +
        '-moz-text-size-adjust: none;' +
        '-moz-user-select: none;');

    this.zoomWarningNode_.addEventListener('click', function(e) {
      this.parentNode.removeChild(this);
    });
  }

  this.zoomWarningNode_.textContent = lib.MessageManager.replaceReferences(
      hterm.zoomWarningMessage,
      [parseInt(this.scrollPort_.characterSize.zoomFactor * 100)]);

  this.zoomWarningNode_.style.fontFamily = this.prefs_.get('font-family');

  if (state) {
    if (!this.zoomWarningNode_.parentNode)
      this.div_.parentNode.appendChild(this.zoomWarningNode_);
  } else if (this.zoomWarningNode_.parentNode) {
    this.zoomWarningNode_.parentNode.removeChild(this.zoomWarningNode_);
  }
};

/**
 * Show the terminal overlay for a given amount of time.
 *
 * The terminal overlay appears in inverse video in a large font, centered
 * over the terminal.  You should probably keep the overlay message brief,
 * since it's in a large font and you probably aren't going to check the size
 * of the terminal first.
 *
 * @param {string} msg The text (not HTML) message to display in the overlay.
 * @param {number} opt_timeout The amount of time to wait before fading out
 *     the overlay.  Defaults to 1.5 seconds.  Pass null to have the overlay
 *     stay up forever (or until the next overlay).
 */
hterm.Terminal.prototype.showOverlay = function(msg, opt_timeout) {
  if (!this.overlayNode_) {
    if (!this.div_)
      return;

    this.overlayNode_ = this.document_.createElement('div');
    this.overlayNode_.style.cssText = (
        'border-radius: 15px;' +
        'font-size: xx-large;' +
        'opacity: 0.75;' +
        'padding: 0.2em 0.5em 0.2em 0.5em;' +
        'position: absolute;' +
        '-webkit-user-select: none;' +
        '-webkit-transition: opacity 180ms ease-in;' +
        '-moz-user-select: none;' +
        '-moz-transition: opacity 180ms ease-in;');

    this.overlayNode_.addEventListener('mousedown', function(e) {
      e.preventDefault();
      e.stopPropagation();
    }, true);
  }

  this.overlayNode_.style.color = this.prefs_.get('background-color');
  this.overlayNode_.style.backgroundColor = this.prefs_.get('foreground-color');
  this.overlayNode_.style.fontFamily = this.prefs_.get('font-family');

  this.overlayNode_.textContent = msg;
  this.overlayNode_.style.opacity = '0.75';

  if (!this.overlayNode_.parentNode)
    this.div_.appendChild(this.overlayNode_);

  var divSize = hterm.getClientSize(this.div_);
  var overlaySize = hterm.getClientSize(this.overlayNode_);

  this.overlayNode_.style.top =
      (divSize.height - overlaySize.height) / 2 + 'px';
  this.overlayNode_.style.left = (divSize.width - overlaySize.width -
      this.scrollPort_.currentScrollbarWidthPx) / 2 + 'px';

  var self = this;

  if (this.overlayTimeout_)
    clearTimeout(this.overlayTimeout_);

  if (opt_timeout === null)
    return;

  this.overlayTimeout_ = setTimeout(function() {
      self.overlayNode_.style.opacity = '0';
      self.overlayTimeout_ = setTimeout(function() {
          if (self.overlayNode_.parentNode)
            self.overlayNode_.parentNode.removeChild(self.overlayNode_);
          self.overlayTimeout_ = null;
          self.overlayNode_.style.opacity = '0.75';
        }, 200);
    }, opt_timeout || 1500);
};

/**
 * Paste from the system clipboard to the terminal.
 */
hterm.Terminal.prototype.paste = function() {
  hterm.pasteFromClipboard(this.document_);
};

/**
 * Copy a string to the system clipboard.
 *
 * Note: If there is a selected range in the terminal, it'll be cleared.
 *
 * @param {string} str The string to copy.
 */
hterm.Terminal.prototype.copyStringToClipboard = function(str) {
  if (this.prefs_.get('enable-clipboard-notice'))
    setTimeout(this.showOverlay.bind(this, hterm.notifyCopyMessage, 500), 200);

  var copySource = this.document_.createElement('pre');
  copySource.textContent = str;
  copySource.style.cssText = (
      '-webkit-user-select: text;' +
      '-moz-user-select: text;' +
      'position: absolute;' +
      'top: -99px');

  this.document_.body.appendChild(copySource);

  var selection = this.document_.getSelection();
  var anchorNode = selection.anchorNode;
  var anchorOffset = selection.anchorOffset;
  var focusNode = selection.focusNode;
  var focusOffset = selection.focusOffset;

  selection.selectAllChildren(copySource);

  hterm.copySelectionToClipboard(this.document_);

  // IE doesn't support selection.extend. This means that the selection
  // won't return on IE.
  if (selection.extend) {
    selection.collapse(anchorNode, anchorOffset);
    selection.extend(focusNode, focusOffset);
  }

  copySource.parentNode.removeChild(copySource);
};

/**
 * Returns the selected text, or null if no text is selected.
 *
 * @return {string|null}
 */
hterm.Terminal.prototype.getSelectionText = function() {
  var selection = this.scrollPort_.selection;
  selection.sync();

  if (selection.isCollapsed)
    return null;


  // Start offset measures from the beginning of the line.
  var startOffset = selection.startOffset;
  var node = selection.startNode;

  if (node.nodeName != 'X-ROW') {
    // If the selection doesn't start on an x-row node, then it must be
    // somewhere inside the x-row.  Add any characters from previous siblings
    // into the start offset.

    if (node.nodeName == '#text' && node.parentNode.nodeName == 'SPAN') {
      // If node is the text node in a styled span, move up to the span node.
      node = node.parentNode;
    }

    while (node.previousSibling) {
      node = node.previousSibling;
      startOffset += hterm.TextAttributes.nodeWidth(node);
    }
  }

  // End offset measures from the end of the line.
  var endOffset = (hterm.TextAttributes.nodeWidth(selection.endNode) -
                   selection.endOffset);
  node = selection.endNode;

  if (node.nodeName != 'X-ROW') {
    // If the selection doesn't end on an x-row node, then it must be
    // somewhere inside the x-row.  Add any characters from following siblings
    // into the end offset.

    if (node.nodeName == '#text' && node.parentNode.nodeName == 'SPAN') {
      // If node is the text node in a styled span, move up to the span node.
      node = node.parentNode;
    }

    while (node.nextSibling) {
      node = node.nextSibling;
      endOffset += hterm.TextAttributes.nodeWidth(node);
    }
  }

  var rv = this.getRowsText(selection.startRow.rowIndex,
                            selection.endRow.rowIndex + 1);
  return lib.wc.substring(rv, startOffset, lib.wc.strWidth(rv) - endOffset);
};

/**
 * Copy the current selection to the system clipboard, then clear it after a
 * short delay.
 */
hterm.Terminal.prototype.copySelectionToClipboard = function() {
  var text = this.getSelectionText();
  if (text != null)
    this.copyStringToClipboard(text);
};

hterm.Terminal.prototype.overlaySize = function() {
  this.showOverlay(this.screenSize.width + 'x' + this.screenSize.height);
};

/**
 * Invoked by hterm.Terminal.Keyboard when a VT keystroke is detected.
 *
 * @param {string} string The VT string representing the keystroke, in UTF-16.
 */
hterm.Terminal.prototype.onVTKeystroke = function(string) {
  if (this.scrollOnKeystroke_)
    this.scrollPort_.scrollRowToBottom(this.getRowCount());

  this.io.onVTKeystroke(this.keyboard.encode(string));
};

/**
 * Launches url in a new tab.
 *
 * @param {string} url URL to launch in a new tab.
 */
hterm.Terminal.prototype.openUrl = function(url) {
  var win = window.open(url, '_blank');
  win.focus();
}

/**
 * Open the selected url.
 */
hterm.Terminal.prototype.openSelectedUrl_ = function() {
  var str = this.getSelectionText();

  // If there is no selection, try and expand wherever they clicked.
  if (str == null) {
    this.screen_.expandSelection(this.document_.getSelection());
    str = this.getSelectionText();
  }

  // Make sure URL is valid before opening.
  if (str.length > 2048 || str.search(/[\s\[\](){}<>"'\\^`]/) >= 0)
    return;
  // If the URL isn't anchored, it'll open relative to the extension.
  // We have no way of knowing the correct schema, so assume http.
  if (str.search('^[a-zA-Z][a-zA-Z0-9+.-]*://') < 0)
    str = 'http://' + str;

  this.openUrl(str);
}


/**
 * Add the terminalRow and terminalColumn properties to mouse events and
 * then forward on to onMouse().
 *
 * The terminalRow and terminalColumn properties contain the (row, column)
 * coordinates for the mouse event.
 *
 * @param {Event} e The mouse event to handle.
 */
hterm.Terminal.prototype.onMouse_ = function(e) {
  if (e.processedByTerminalHandler_) {
    // We register our event handlers on the document, as well as the cursor
    // and the scroll blocker.  Mouse events that occur on the cursor or
    // scroll blocker will also appear on the document, but we don't want to
    // process them twice.
    //
    // We can't just prevent bubbling because that has other side effects, so
    // we decorate the event object with this property instead.
    return;
  }

  var reportMouseEvents = (!this.defeatMouseReports_ &&
      this.vt.mouseReport != this.vt.MOUSE_REPORT_DISABLED);

  e.processedByTerminalHandler_ = true;

  // One based row/column stored on the mouse event.
  e.terminalRow = parseInt((e.clientY - this.scrollPort_.visibleRowTopMargin) /
                           this.scrollPort_.characterSize.height) + 1;
  e.terminalColumn = parseInt(e.clientX /
                              this.scrollPort_.characterSize.width) + 1;

  if (e.type == 'mousedown' && e.terminalColumn > this.screenSize.width) {
    // Mousedown in the scrollbar area.
    return;
  }

  if (this.options_.cursorVisible && !reportMouseEvents) {
    // If the cursor is visible and we're not sending mouse events to the
    // host app, then we want to hide the terminal cursor when the mouse
    // cursor is over top.  This keeps the terminal cursor from interfering
    // with local text selection.
    if (e.terminalRow - 1 == this.screen_.cursorPosition.row &&
        e.terminalColumn - 1 == this.screen_.cursorPosition.column) {
      this.cursorNode_.style.display = 'none';
    } else if (this.cursorNode_.style.display == 'none') {
      this.cursorNode_.style.display = '';
    }
  }

  if (e.type == 'mousedown') {
    if (e.altKey || !reportMouseEvents) {
      // If VT mouse reporting is disabled, or has been defeated with
      // alt-mousedown, then the mouse will act on the local selection.
      this.defeatMouseReports_ = true;
      this.setSelectionEnabled(true);
    } else {
      // Otherwise we defer ownership of the mouse to the VT.
      this.defeatMouseReports_ = false;
      this.document_.getSelection().collapseToEnd();
      this.setSelectionEnabled(false);
      e.preventDefault();
    }
  }

  if (!reportMouseEvents) {
    if (e.type == 'dblclick' && this.copyOnSelect) {
      this.screen_.expandSelection(this.document_.getSelection());
      this.copySelectionToClipboard(this.document_);
    }

    if (e.type == 'click' && !e.shiftKey && e.ctrlKey) {
      // Debounce this event with the dblclick event.  If you try to doubleclick
      // a URL to open it, Chrome will fire click then dblclick, but we won't
      // have expanded the selection text at the first click event.
      clearTimeout(this.timeouts_.openUrl);
      this.timeouts_.openUrl = setTimeout(this.openSelectedUrl_.bind(this),
                                          500);
      return;
    }

    if (e.type == 'mousedown' && e.which == this.mousePasteButton)
      this.paste();

    if (e.type == 'mouseup' && e.which == 1 && this.copyOnSelect &&
        !this.document_.getSelection().isCollapsed) {
      this.copySelectionToClipboard(this.document_);
    }

    if ((e.type == 'mousemove' || e.type == 'mouseup') &&
        this.scrollBlockerNode_.engaged) {
      // Disengage the scroll-blocker after one of these events.
      this.scrollBlockerNode_.engaged = false;
      this.scrollBlockerNode_.style.top = '-99px';
    }

  } else /* if (this.reportMouseEvents) */ {
    if (!this.scrollBlockerNode_.engaged) {
      if (e.type == 'mousedown') {
        // Move the scroll-blocker into place if we want to keep the scrollport
        // from scrolling.
        this.scrollBlockerNode_.engaged = true;
        this.scrollBlockerNode_.style.top = (e.clientY - 5) + 'px';
        this.scrollBlockerNode_.style.left = (e.clientX - 5) + 'px';
      } else if (e.type == 'mousemove') {
        // Oh.  This means that drag-scroll was disabled AFTER the mouse down,
        // in which case it's too late to engage the scroll-blocker.
        this.document_.getSelection().collapseToEnd();
        e.preventDefault();
      }
    }

    this.onMouse(e);
  }

  if (e.type == 'mouseup' && this.document_.getSelection().isCollapsed) {
    // Restore this on mouseup in case it was temporarily defeated with a
    // alt-mousedown.  Only do this when the selection is empty so that
    // we don't immediately kill the users selection.
    this.defeatMouseReports_ = false;
  }
};

/**
 * Clients should override this if they care to know about mouse events.
 *
 * The event parameter will be a normal DOM mouse click event with additional
 * 'terminalRow' and 'terminalColumn' properties.
 *
 * @param {Event} e The mouse event to handle.
 */
hterm.Terminal.prototype.onMouse = function(e) { };

/**
 * React when focus changes.
 *
 * @param {boolean} focused True if focused, false otherwise.
 */
hterm.Terminal.prototype.onFocusChange_ = function(focused) {
  this.cursorNode_.setAttribute('focus', focused);
  this.restyleCursor_();
  if (focused === true)
    this.closeBellNotifications_();
};

/**
 * React when the ScrollPort is scrolled.
 */
hterm.Terminal.prototype.onScroll_ = function() {
  this.scheduleSyncCursorPosition_();
};

/**
 * React when text is pasted into the scrollPort.
 *
 * @param {Event} e The DOM paste event to handle.
 */
hterm.Terminal.prototype.onPaste_ = function(e) {
  var data = e.text.replace(/\n/mg, '\r');
  data = this.keyboard.encode(data);
  if (this.options_.bracketedPaste)
    data = '\x1b[200~' + data + '\x1b[201~';

  this.io.sendString(data);
};

/**
 * React when the user tries to copy from the scrollPort.
 *
 * @param {Event} e The DOM copy event.
 */
hterm.Terminal.prototype.onCopy_ = function(e) {
  if (!this.useDefaultWindowCopy) {
    e.preventDefault();
    setTimeout(this.copySelectionToClipboard.bind(this), 0);
  }
};

/**
 * React when the ScrollPort is resized.
 *
 * Note: This function should not directly contain code that alters the internal
 * state of the terminal.  That kind of code belongs in realizeWidth or
 * realizeHeight, so that it can be executed synchronously in the case of a
 * programmatic width change.
 */
hterm.Terminal.prototype.onResize_ = function() {
  var columnCount = Math.floor(this.scrollPort_.getScreenWidth() /
                               this.scrollPort_.characterSize.width) || 0;
  var rowCount = lib.f.smartFloorDivide(this.scrollPort_.getScreenHeight(),
                            this.scrollPort_.characterSize.height) || 0;

  if (columnCount <= 0 || rowCount <= 0) {
    // We avoid these situations since they happen sometimes when the terminal
    // gets removed from the document or during the initial load, and we can't
    // deal with that.
    // This can also happen if called before the scrollPort calculates the
    // character size, meaning we dived by 0 above and default to 0 values.
    return;
  }

  var isNewSize = (columnCount != this.screenSize.width ||
                   rowCount != this.screenSize.height);

  // We do this even if the size didn't change, just to be sure everything is
  // in sync.
  this.realizeSize_(columnCount, rowCount);
  this.showZoomWarning_(this.scrollPort_.characterSize.zoomFactor != 1);

  if (isNewSize)
    this.overlaySize();

  this.restyleCursor_();
  this.scheduleSyncCursorPosition_();
};

/**
 * Service the cursor blink timeout.
 */
hterm.Terminal.prototype.onCursorBlink_ = function() {
  if (!this.options_.cursorBlink) {
    delete this.timeouts_.cursorBlink;
    return;
  }

  if (this.cursorNode_.getAttribute('focus') == 'false' ||
      this.cursorNode_.style.opacity == '0') {
    this.cursorNode_.style.opacity = '1';
    this.timeouts_.cursorBlink = setTimeout(this.myOnCursorBlink_,
                                            this.cursorBlinkCycle_[0]);
  } else {
    this.cursorNode_.style.opacity = '0';
    this.timeouts_.cursorBlink = setTimeout(this.myOnCursorBlink_,
                                            this.cursorBlinkCycle_[1]);
  }
};

/**
 * Set the scrollbar-visible mode bit.
 *
 * If scrollbar-visible is on, the vertical scrollbar will be visible.
 * Otherwise it will not.
 *
 * Defaults to on.
 *
 * @param {boolean} state True to set scrollbar-visible mode, false to unset.
 */
hterm.Terminal.prototype.setScrollbarVisible = function(state) {
  this.scrollPort_.setScrollbarVisible(state);
};

/**
 * Set the scroll wheel move multiplier.  This will affect how fast the page
 * scrolls on mousewheel events.
 *
 * Defaults to 1.
 *
 * @param {number} multiplier The multiplier to set.
 */
hterm.Terminal.prototype.setScrollWheelMoveMultipler = function(multiplier) {
  this.scrollPort_.setScrollWheelMoveMultipler(multiplier);
};

/**
 * Close all web notifications created by terminal bells.
 */
hterm.Terminal.prototype.closeBellNotifications_ = function() {
  this.bellNotificationList_.forEach(function(n) {
      n.close();
    });
  this.bellNotificationList_.length = 0;
};
// SOURCE FILE: hterm/js/hterm_terminal_io.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.encodeUTF8');

/**
 * Input/Output interface used by commands to communicate with the terminal.
 *
 * Commands like `nassh` and `crosh` receive an instance of this class as
 * part of their argv object.  This allows them to write to and read from the
 * terminal without exposing them to an entire hterm.Terminal instance.
 *
 * The active command must override the onVTKeystroke() and sendString() methods
 * of this class in order to receive keystrokes and send output to the correct
 * destination.
 *
 * Isolating commands from the terminal provides the following benefits:
 * - Provides a mechanism to save and restore onVTKeystroke and sendString
 *   handlers when invoking subcommands (see the push() and pop() methods).
 * - The isolation makes it easier to make changes in Terminal and supporting
 *   classes without affecting commands.
 * - In The Future commands may run in web workers where they would only be able
 *   to talk to a Terminal instance through an IPC mechanism.
 *
 * @param {hterm.Terminal}
 */
hterm.Terminal.IO = function(terminal) {
  this.terminal_ = terminal;

  // The IO object to restore on IO.pop().
  this.previousIO_ = null;
};

/**
 * Show the terminal overlay for a given amount of time.
 *
 * The terminal overlay appears in inverse video in a large font, centered
 * over the terminal.  You should probably keep the overlay message brief,
 * since it's in a large font and you probably aren't going to check the size
 * of the terminal first.
 *
 * @param {string} msg The text (not HTML) message to display in the overlay.
 * @param {number} opt_timeout The amount of time to wait before fading out
 *     the overlay.  Defaults to 1.5 seconds.  Pass null to have the overlay
 *     stay up forever (or until the next overlay).
 */
hterm.Terminal.IO.prototype.showOverlay = function(message, opt_timeout) {
  this.terminal_.showOverlay(message, opt_timeout);
};

/**
 * Open an frame in the current terminal window, pointed to the specified
 * url.
 *
 * Eventually we'll probably need size/position/decoration options.
 * The user should also be able to move/resize the frame.
 *
 * @param {string} url The URL to load in the frame.
 * @param {Object} opt_options Optional frame options.  Not implemented.
 */
hterm.Terminal.IO.prototype.createFrame = function(url, opt_options) {
  return new hterm.Frame(this.terminal_, url, opt_options);
};

/**
 * Change the preference profile for the terminal.
 *
 * @param profileName {string} The name of the preference profile to activate.
 */
hterm.Terminal.IO.prototype.setTerminalProfile = function(profileName) {
  this.terminal_.setProfile(profileName);
};

/**
 * Create a new hterm.Terminal.IO instance and make it active on the Terminal
 * object associated with this instance.
 *
 * This is used to pass control of the terminal IO off to a subcommand.  The
 * IO.pop() method can be used to restore control when the subcommand completes.
 */
hterm.Terminal.IO.prototype.push = function() {
  var io = new hterm.Terminal.IO(this.terminal_);
  io.keyboardCaptured_ = this.keyboardCaptured_;

  io.columnCount = this.columnCount;
  io.rowCount = this.rowCount;

  io.previousIO_ = this.terminal_.io;
  this.terminal_.io = io;

  return io;
};

/**
 * Restore the Terminal's previous IO object.
 */
hterm.Terminal.IO.prototype.pop = function() {
  this.terminal_.io = this.previousIO_;
};

/**
 * Called when data needs to be sent to the current command.
 *
 * Clients should override this to receive notification of pending data.
 *
 * @param {string} string The data to send.
 */
hterm.Terminal.IO.prototype.sendString = function(string) {
  // Override this.
  console.log('Unhandled sendString: ' + string);
};

/**
 * Called when a terminal keystroke is detected.
 *
 * Clients should override this to receive notification of keystrokes.
 *
 * The keystroke data will be encoded according to the 'send-encoding'
 * preference.
 *
 * @param {string} string The VT key sequence.
 */
hterm.Terminal.IO.prototype.onVTKeystroke = function(string) {
  // Override this.
  console.log('Unobserverd VT keystroke: ' + JSON.stringify(string));
};

hterm.Terminal.IO.prototype.onTerminalResize_ = function(width, height) {
  var obj = this;
  while (obj) {
    obj.columnCount = width;
    obj.rowCount = height;
    obj = obj.previousIO_;
  }

  this.onTerminalResize(width, height);
};

/**
 * Called when terminal size is changed.
 *
 * Clients should override this to receive notification of resize.
 *
 * @param {string|integer} terminal width.
 * @param {string|integer} terminal height.
 */
hterm.Terminal.IO.prototype.onTerminalResize = function(width, height) {
  // Override this.
};

/**
 * Write a UTF-8 encoded byte string to the terminal.
 *
 * @param {string} string The UTF-8 encoded string to print.
 */
hterm.Terminal.IO.prototype.writeUTF8 = function(string) {
  if (this.terminal_.io != this)
    throw 'Attempt to print from inactive IO object.';

  this.terminal_.interpret(string);
};

/**
 * Write a UTF-8 encoded byte string to the terminal followed by crlf.
 *
 * @param {string} string The UTF-8 encoded string to print.
 */
hterm.Terminal.IO.prototype.writelnUTF8 = function(string) {
  if (this.terminal_.io != this)
    throw 'Attempt to print from inactive IO object.';

  this.terminal_.interpret(string + '\r\n');
};

/**
 * Write a UTF-16 JavaScript string to the terminal.
 *
 * @param {string} string The string to print.
 */
hterm.Terminal.IO.prototype.print =
hterm.Terminal.IO.prototype.writeUTF16 = function(string) {
  this.writeUTF8(lib.encodeUTF8(string));
};

/**
 * Print a UTF-16 JavaScript string to the terminal followed by a newline.
 *
 * @param {string} string The string to print.
 */
hterm.Terminal.IO.prototype.println =
hterm.Terminal.IO.prototype.writelnUTF16 = function(string) {
  this.writelnUTF8(lib.encodeUTF8(string));
};
// SOURCE FILE: hterm/js/hterm_text_attributes.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.colors');

/**
 * Constructor for TextAttribute objects.
 *
 * These objects manage a set of text attributes such as foreground/
 * background color, bold, faint, italic, blink, underline, and strikethrough.
 *
 * TextAttribute instances can be used to construct a DOM container implementing
 * the current attributes, or to test an existing DOM container for
 * compatibility with the current attributes.
 *
 * @constructor
 * @param {HTMLDocument} document The parent document to use when creating
 *     new DOM containers.
 */
hterm.TextAttributes = function(document) {
  this.document_ = document;
  // These variables contain the source of the color as either:
  // SRC_DEFAULT  (use context default)
  // SRC_RGB      (specified in 'rgb( r, g, b)' form)
  // number       (representing the index from color palette to use)
  this.foregroundSource = this.SRC_DEFAULT;
  this.backgroundSource = this.SRC_DEFAULT;

  // These properties cache the value in the color table, but foregroundSource
  // and backgroundSource contain the canonical values.
  this.foreground = this.DEFAULT_COLOR;
  this.background = this.DEFAULT_COLOR;

  this.defaultForeground = 'rgb(255, 255, 255)';
  this.defaultBackground = 'rgb(0, 0, 0)';

  this.bold = false;
  this.faint = false;
  this.italic = false;
  this.blink = false;
  this.underline = false;
  this.strikethrough = false;
  this.inverse = false;
  this.invisible = false;
  this.wcNode = false;
  this.tileData = null;

  this.colorPalette = null;
  this.resetColorPalette();
};

/**
 * If false, we ignore the bold attribute.
 *
 * This is used for fonts that have a bold version that is a different size
 * than the normal weight version.
 */
hterm.TextAttributes.prototype.enableBold = true;

/**
 * If true, use bright colors (if available) for bold text.
 *
 * This setting is independent of the enableBold setting.
 */
hterm.TextAttributes.prototype.enableBoldAsBright = true;

/**
 * A sentinel constant meaning "whatever the default color is in this context".
 */
hterm.TextAttributes.prototype.DEFAULT_COLOR = new String('');

/**
 * A constant string used to specify that source color is context default.
 */
hterm.TextAttributes.prototype.SRC_DEFAULT = 'default';


/**
 * A constant string used to specify that the source of a color is a valid
 * rgb( r, g, b) specifier.
 */
hterm.TextAttributes.prototype.SRC_RGB = 'rgb';

/**
 * The document object which should own the DOM nodes created by this instance.
 *
 * @param {HTMLDocument} document The parent document.
 */
hterm.TextAttributes.prototype.setDocument = function(document) {
  this.document_ = document;
};

/**
 * Create a deep copy of this object.
 *
 * @return {hterm.TextAttributes} A deep copy of this object.
 */
hterm.TextAttributes.prototype.clone = function() {
  var rv = new hterm.TextAttributes(null);

  for (var key in this) {
    rv[key] = this[key];
  }

  rv.colorPalette = this.colorPalette.concat();
  return rv;
};

/**
 * Reset the current set of attributes.
 *
 * This does not affect the palette.  Use resetColorPalette() for that.
 * It also doesn't affect the tile data, it's not meant to.
 */
hterm.TextAttributes.prototype.reset = function() {
  this.foregroundSource = this.SRC_DEFAULT;
  this.backgroundSource = this.SRC_DEFAULT;
  this.foreground = this.DEFAULT_COLOR;
  this.background = this.DEFAULT_COLOR;
  this.bold = false;
  this.faint = false;
  this.italic = false;
  this.blink = false;
  this.underline = false;
  this.strikethrough = false;
  this.inverse = false;
  this.invisible = false;
  this.wcNode = false;
};

/**
 * Reset the color palette to the default state.
 */
hterm.TextAttributes.prototype.resetColorPalette = function() {
  this.colorPalette = lib.colors.colorPalette.concat();
  this.syncColors();
};

/**
 * Test if the current attributes describe unstyled text.
 *
 * @return {boolean} True if the current attributes describe unstyled text.
 */
hterm.TextAttributes.prototype.isDefault = function() {
  return (this.foregroundSource == this.SRC_DEFAULT &&
          this.backgroundSource == this.SRC_DEFAULT &&
          !this.bold &&
          !this.faint &&
          !this.italic &&
          !this.blink &&
          !this.underline &&
          !this.strikethrough &&
          !this.inverse &&
          !this.invisible &&
          !this.wcNode &&
          this.tileData == null);
};

/**
 * Create a DOM container (a span or a text node) with a style to match the
 * current set of attributes.
 *
 * This method will create a plain text node if the text is unstyled, or
 * an HTML span if the text is styled.  Due to lack of monospace wide character
 * fonts on certain systems (e.g. Chrome OS), we need to put each wide character
 * in a span of CSS class '.wc-node' which has double column width.
 * Each vt_tiledata tile is also represented by a span with a single
 * character, with CSS classes '.tile' and '.tile_<glyph number>'.
 *
 * @param {string} opt_textContent Optional text content for the new container.
 * @return {HTMLNode} An HTML span or text nodes styled to match the current
 *     attributes.
 */
hterm.TextAttributes.prototype.createContainer = function(opt_textContent) {
  if (this.isDefault())
    return this.document_.createTextNode(opt_textContent);

  var span = this.document_.createElement('span');
  var style = span.style;
  var classes = [];

  if (this.foreground != this.DEFAULT_COLOR)
    style.color = this.foreground;

  if (this.background != this.DEFAULT_COLOR)
    style.backgroundColor = this.background;

  if (this.enableBold && this.bold)
    style.fontWeight = 'bold';

  if (this.faint)
    span.faint = true;

  if (this.italic)
    style.fontStyle = 'italic';

  if (this.blink) {
    classes.push('blink-node');
    span.blinkNode = true;
  }

  var textDecoration = '';
  if (this.underline) {
    textDecoration += ' underline';
    span.underline = true;
  }
  if (this.strikethrough) {
    textDecoration += ' line-through';
    span.strikethrough = true;
  }
  if (textDecoration) {
    style.textDecoration = textDecoration;
  }

  if (this.wcNode) {
    classes.push('wc-node');
    span.wcNode = true;
  }

  if (this.tileData != null) {
    classes.push('tile');
    classes.push('tile_' + this.tileData);
    span.tileNode = true;
  }

  if (opt_textContent)
    span.textContent = opt_textContent;

  if (classes.length)
    span.className = classes.join(' ');

  return span;
};

/**
 * Tests if the provided object (string, span or text node) has the same
 * style as this TextAttributes instance.
 *
 * This indicates that text with these attributes could be inserted directly
 * into the target DOM node.
 *
 * For the purposes of this method, a string is considered a text node.
 *
 * @param {string|HTMLNode} obj The object to test.
 * @return {boolean} True if the provided container has the same style as
 *     this attributes instance.
 */
hterm.TextAttributes.prototype.matchesContainer = function(obj) {
  if (typeof obj == 'string' || obj.nodeType == 3)
    return this.isDefault();

  var style = obj.style;

  // We don't want to put multiple characters in a wcNode or a tile.
  // See the comments in createContainer.
  return (!(this.wcNode || obj.wcNode) &&
          !(this.tileData != null || obj.tileNode) &&
          this.foreground == style.color &&
          this.background == style.backgroundColor &&
          (this.enableBold && this.bold) == !!style.fontWeight &&
          this.blink == obj.blinkNode &&
          this.italic == !!style.fontStyle &&
          !!this.underline == !!obj.underline &&
          !!this.strikethrough == !!obj.strikethrough);
};

hterm.TextAttributes.prototype.setDefaults = function(foreground, background) {
  this.defaultForeground = foreground;
  this.defaultBackground = background;

  this.syncColors();
};

/**
 * Updates foreground and background properties based on current indices and
 * other state.
 *
 * @param {string} terminalForeground The terminal foreground color for use as
 *     inverse text background.
 * @param {string} terminalBackground The terminal background color for use as
 *     inverse text foreground.
 *
 */
hterm.TextAttributes.prototype.syncColors = function() {
  function getBrightIndex(i) {
    if (i < 8) {
      // If the color is from the lower half of the ANSI 16, add 8.
      return i + 8;
    }

    // If it's not from the 16 color palette, ignore bold requests.  This
    // matches the behavior of gnome-terminal.
    return i;
  }

  var foregroundSource = this.foregroundSource;
  var backgroundSource = this.backgroundSource;
  var defaultForeground = this.DEFAULT_COLOR;
  var defaultBackground = this.DEFAULT_COLOR;

  if (this.inverse) {
    foregroundSource = this.backgroundSource;
    backgroundSource = this.foregroundSource;
    // We can't inherit the container's color anymore.
    defaultForeground = this.defaultBackground;
    defaultBackground = this.defaultForeground;
  }

  if (this.enableBoldAsBright && this.bold) {
    if (foregroundSource != this.SRC_DEFAULT &&
        foregroundSource != this.SRC_RGB) {
      foregroundSource = getBrightIndex(foregroundSource);
    }
  }

  if (this.invisible) {
    foregroundSource = backgroundSource;
    defaultForeground = this.defaultBackground;
  }

  // Set fore/background colors unless already specified in rgb(r, g, b) form.
  if (foregroundSource != this.SRC_RGB) {
    this.foreground = ((foregroundSource == this.SRC_DEFAULT) ?
                       defaultForeground : this.colorPalette[foregroundSource]);
  }

  if (this.faint && !this.invisible) {
    var colorToMakeFaint = ((this.foreground == this.DEFAULT_COLOR) ?
                            this.defaultForeground : this.foreground);
    this.foreground = lib.colors.mix(colorToMakeFaint, 'rgb(0, 0, 0)', 0.3333);
  }

  if (backgroundSource != this.SRC_RGB) {
    this.background = ((backgroundSource == this.SRC_DEFAULT) ?
                       defaultBackground : this.colorPalette[backgroundSource]);
  }
};

/**
 * Static method used to test if the provided objects (strings, spans or
 * text nodes) have the same style.
 *
 * For the purposes of this method, a string is considered a text node.
 *
 * @param {string|HTMLNode} obj1 An object to test.
 * @param {string|HTMLNode} obj2 Another object to test.
 * @return {boolean} True if the containers have the same style.
 */
hterm.TextAttributes.containersMatch = function(obj1, obj2) {
  if (typeof obj1 == 'string')
    return hterm.TextAttributes.containerIsDefault(obj2);

  if (obj1.nodeType != obj2.nodeType)
    return false;

  if (obj1.nodeType == 3)
    return true;

  var style1 = obj1.style;
  var style2 = obj2.style;

  return (style1.color == style2.color &&
          style1.backgroundColor == style2.backgroundColor &&
          style1.fontWeight == style2.fontWeight &&
          style1.fontStyle == style2.fontStyle &&
          style1.textDecoration == style2.textDecoration);
};

/**
 * Static method to test if a given DOM container represents unstyled text.
 *
 * For the purposes of this method, a string is considered a text node.
 *
 * @param {string|HTMLNode} obj1 An object to test.
 * @return {boolean} True if the object is unstyled.
 */
hterm.TextAttributes.containerIsDefault = function(obj) {
  return typeof obj == 'string'  || obj.nodeType == 3;
};

/**
 * Static method to get the column width of a node's textContent.
 *
 * @param {HTMLElement} node The HTML element to get the width of textContent
 *     from.
 * @return {integer} The column width of the node's textContent.
 */
hterm.TextAttributes.nodeWidth = function(node) {
  if (node.wcNode) {
    return lib.wc.strWidth(node.textContent);
  } else {
    return node.textContent.length;
  }
}

/**
 * Static method to get the substr of a node's textContent.  The start index
 * and substr width are computed in column width.
 *
 * @param {HTMLElement} node The HTML element to get the substr of textContent
 *     from.
 * @param {integer} start The starting offset in column width.
 * @param {integer} width The width to capture in column width.
 * @return {integer} The extracted substr of the node's textContent.
 */
hterm.TextAttributes.nodeSubstr = function(node, start, width) {
  if (node.wcNode) {
    return lib.wc.substr(node.textContent, start, width);
  } else {
    return node.textContent.substr(start, width);
  }
}

/**
 * Static method to get the substring based of a node's textContent.  The
 * start index of end index are computed in column width.
 *
 * @param {HTMLElement} node The HTML element to get the substr of textContent
 *     from.
 * @param {integer} start The starting offset in column width.
 * @param {integer} end The ending offset in column width.
 * @return {integer} The extracted substring of the node's textContent.
 */
hterm.TextAttributes.nodeSubstring = function(node, start, end) {
  if (node.wcNode) {
    return lib.wc.substring(node.textContent, start, end);
  } else {
    return node.textContent.substring(start, end);
  }
};

/**
 * Static method to split a string into contiguous runs of single-width
 * characters and runs of double-width characters.
 *
 * @param {string} str The string to split.
 * @return {Array} An array of objects that contain substrings of str, where
 *     each substring is either a contiguous runs of single-width characters
 *     or a double-width character.  For object that contains a double-width
 *     character, its wcNode property is set to true.
 */
hterm.TextAttributes.splitWidecharString = function(str) {
  var rv = [];
  var base = 0, length = 0;

  for (var i = 0; i < str.length;) {
    var c = str.codePointAt(i);
    var increment = (c <= 0xffff) ? 1 : 2;
    if (c < 128 || lib.wc.charWidth(c) == 1) {
      length += increment;
    } else {
      if (length) {
        rv.push({str: str.substr(base, length)});
      }
      rv.push({str: str.substr(i, increment), wcNode: true});
      base = i + increment;
      length = 0;
    }
    i += increment;
  }

  if (length)
    rv.push({str: str.substr(base, length)});

  return rv;
};
// SOURCE FILE: hterm/js/hterm_vt.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.colors', 'lib.f', 'lib.UTF8Decoder',
          'hterm.VT.CharacterMap');

/**
 * Constructor for the VT escape sequence interpreter.
 *
 * The interpreter operates on a terminal object capable of performing cursor
 * move operations, painting characters, etc.
 *
 * This interpreter is intended to be compatible with xterm, though it
 * ignores some of the more esoteric escape sequences.
 *
 * Some sequences are marked "Will not implement", meaning that they aren't
 * considered relevant to hterm and will probably never be implemented.
 *
 * Others are marked "Not currently implemented", meaning that they are lower
 * priority items that may be useful to implement at some point.
 *
 * See also:
 *   [VT100] VT100 User Guide
 *           http://vt100.net/docs/vt100-ug/chapter3.html
 *   [VT510] VT510 Video Terminal Programmer Information
 *           http://vt100.net/docs/vt510-rm/contents
 *   [XTERM] Xterm Control Sequences
 *           http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
 *   [CTRL]  Wikipedia: C0 and C1 Control Codes
 *           https://en.wikipedia.org/wiki/C0_and_C1_control_codes
 *   [CSI]   Wikipedia: ANSI Escape Code
 *           https://en.wikipedia.org/wiki/Control_Sequence_Introducer
 *   man 5 terminfo, man infocmp, infocmp -L xterm-new
 *
 * @param {hterm.Terminal} terminal Terminal to use with the interpreter.
 */
hterm.VT = function(terminal) {
  /**
   * The display terminal object associated with this virtual terminal.
   */
  this.terminal = terminal;

  terminal.onMouse = this.onTerminalMouse_.bind(this);
  this.mouseReport = this.MOUSE_REPORT_DISABLED;

  // Parse state left over from the last parse.  You should use the parseState
  // instance passed into your parse routine, rather than reading
  // this.parseState_ directly.
  this.parseState_ = new hterm.VT.ParseState(this.parseUnknown_);

  // Any "leading modifiers" for the escape sequence, such as '?', ' ', or the
  // other modifiers handled in this.parseCSI_.
  this.leadingModifier_ = '';

  // Any "trailing modifiers".  Same character set as a leading modifier,
  // except these are found after the numeric arguments.
  this.trailingModifier_ = '';

  // Whether or not to respect the escape codes for setting terminal width.
  this.allowColumnWidthChanges_ = false;

  // The amount of time we're willing to wait for the end of an OSC sequence.
  this.oscTimeLimit_ = 20000;

  // Construct a regular expression to match the known one-byte control chars.
  // This is used in parseUnknown_ to quickly scan a string for the next
  // control character.
  var cc1 = Object.keys(hterm.VT.CC1).map(
      function(e) {
        return '\\x' + lib.f.zpad(e.charCodeAt().toString(16), 2)
      }).join('');
  this.cc1Pattern_ = new RegExp('[' + cc1 + ']');

  // Decoder to maintain UTF-8 decode state.
  this.utf8Decoder_ = new lib.UTF8Decoder();

  /**
   * Whether to accept the 8-bit control characters.
   *
   * An 8-bit control character is one with the eighth bit set.  These
   * didn't work on 7-bit terminals so they all have two byte equivalents.
   * Most hosts still only use the two-byte versions.
   *
   * We ignore 8-bit control codes by default.  This is in order to avoid
   * issues with "accidental" usage of codes that need to be terminated.
   * The "accident" usually involves cat'ing binary data.
   */
  this.enable8BitControl = false;

  /**
   * Whether to allow the OSC 52 sequence to write to the system clipboard.
   */
  this.enableClipboardWrite = true;

  /**
   * Respect the host's attempt to change the cursor blink status using
   * the DEC Private mode 12.
   */
  this.enableDec12 = false;

  /**
   * The expected encoding method for data received from the host.
   */
  this.characterEncoding = 'utf-8';

  /**
   * Max length of an unterminated DCS, OSC, PM or APC sequence before we give
   * up and ignore the code.
   *
   * These all end with a String Terminator (ST, '\x9c', ESC '\\') or
   * (BEL, '\x07') character, hence the "string sequence" moniker.
   */
  this.maxStringSequence = 1024;

  /**
   * If true, emit warnings when we encounter a control character or escape
   * sequence that we don't recognize or explicitly ignore.
   */
  this.warnUnimplemented = true;

  /**
   * The default G0...G3 character maps.
   */
  this.G0 = hterm.VT.CharacterMap.maps['B'];
  this.G1 = hterm.VT.CharacterMap.maps['0'];
  this.G2 = hterm.VT.CharacterMap.maps['B'];
  this.G3 = hterm.VT.CharacterMap.maps['B'];

  /**
   * The 7-bit visible character set.
   *
   * This is a mapping from inbound data to display glyph.  The GL set
   * contains the 94 bytes from 0x21 to 0x7e.
   *
   * The default GL set is 'B', US ASCII.
   */
  this.GL = 'G0';

  /**
   * The 8-bit visible character set.
   *
   * This is a mapping from inbound data to display glyph.  The GR set
   * contains the 94 bytes from 0xa1 to 0xfe.
   */
  this.GR = 'G0';

  // Saved state used in DECSC.
  //
  // This is a place to store a copy VT state, it is *not* the active state.
  this.savedState_ = new hterm.VT.CursorState(this);
};

/**
 * No mouse events.
 */
hterm.VT.prototype.MOUSE_REPORT_DISABLED = 0;

/**
 * DECSET mode 1000.
 *
 * Report mouse down/up events only.
 */
hterm.VT.prototype.MOUSE_REPORT_CLICK = 1;

/**
 * DECSET mode 1002.
 *
 * Report mouse down/up and movement while a button is down.
 */
hterm.VT.prototype.MOUSE_REPORT_DRAG = 3;

/**
 * ParseState constructor.
 *
 * This object tracks the current state of the parse.  It has fields for the
 * current buffer, position in the buffer, and the parse function.
 *
 * @param {function} defaultFunc The default parser function.
 * @param {string} opt_buf Optional string to use as the current buffer.
 */
hterm.VT.ParseState = function(defaultFunction, opt_buf) {
  this.defaultFunction = defaultFunction;
  this.buf = opt_buf || null;
  this.pos = 0;
  this.func = defaultFunction;
  this.args = [];
};

/**
 * Reset the parser function, buffer, and position.
 */
hterm.VT.ParseState.prototype.reset = function(opt_buf) {
  this.resetParseFunction();
  this.resetBuf(opt_buf || '');
  this.resetArguments();
};

/**
 * Reset the parser function only.
 */
hterm.VT.ParseState.prototype.resetParseFunction = function() {
  this.func = this.defaultFunction;
};

/**
 * Reset the buffer and position only.
 *
 * @param {string} buf Optional new value for buf, defaults to null.
 */
hterm.VT.ParseState.prototype.resetBuf = function(opt_buf) {
  this.buf = (typeof opt_buf == 'string') ? opt_buf : null;
  this.pos = 0;
};

/**
 * Reset the arguments list only.
 *
 * @param {string} opt_arg_zero Optional initial value for args[0].
 */
hterm.VT.ParseState.prototype.resetArguments = function(opt_arg_zero) {
  this.args.length = 0;
  if (typeof opt_arg_zero != 'undefined')
    this.args[0] = opt_arg_zero;
};

/**
 * Get an argument as an integer.
 *
 * @param {number} argnum The argument number to retrieve.
 */
hterm.VT.ParseState.prototype.iarg = function(argnum, defaultValue) {
  var str = this.args[argnum];
  if (str) {
    var ret = parseInt(str, 10);
    // An argument of zero is treated as the default value.
    if (ret == 0)
      ret = defaultValue;
    return ret;
  }
  return defaultValue;
};

/**
 * Advance the parse position.
 *
 * @param {integer} count The number of bytes to advance.
 */
hterm.VT.ParseState.prototype.advance = function(count) {
  this.pos += count;
};

/**
 * Return the remaining portion of the buffer without affecting the parse
 * position.
 *
 * @return {string} The remaining portion of the buffer.
 */
hterm.VT.ParseState.prototype.peekRemainingBuf = function() {
  return this.buf.substr(this.pos);
};

/**
 * Return the next single character in the buffer without affecting the parse
 * position.
 *
 * @return {string} The next character in the buffer.
 */
hterm.VT.ParseState.prototype.peekChar = function() {
  return this.buf.substr(this.pos, 1);
};

/**
 * Return the next single character in the buffer and advance the parse
 * position one byte.
 *
 * @return {string} The next character in the buffer.
 */
hterm.VT.ParseState.prototype.consumeChar = function() {
  return this.buf.substr(this.pos++, 1);
};

/**
 * Return true if the buffer is empty, or the position is past the end.
 */
hterm.VT.ParseState.prototype.isComplete = function() {
  return this.buf == null || this.buf.length <= this.pos;
};

hterm.VT.CursorState = function(vt) {
  this.vt_ = vt;
  this.save();
};

hterm.VT.CursorState.prototype.save = function() {
  this.cursor = this.vt_.terminal.saveCursor();

  this.textAttributes = this.vt_.terminal.getTextAttributes().clone();

  this.GL = this.vt_.GL;
  this.GR = this.vt_.GR;

  this.G0 = this.vt_.G0;
  this.G1 = this.vt_.G1;
  this.G2 = this.vt_.G2;
  this.G3 = this.vt_.G3;
};

hterm.VT.CursorState.prototype.restore = function() {
  this.vt_.terminal.restoreCursor(this.cursor);

  this.vt_.terminal.setTextAttributes(this.textAttributes.clone());

  this.vt_.GL = this.GL;
  this.vt_.GR = this.GR;

  this.vt_.G0 = this.G0;
  this.vt_.G1 = this.G1;
  this.vt_.G2 = this.G2;
  this.vt_.G3 = this.G3;
};

hterm.VT.prototype.reset = function() {
  this.G0 = hterm.VT.CharacterMap.maps['B'];
  this.G1 = hterm.VT.CharacterMap.maps['0'];
  this.G2 = hterm.VT.CharacterMap.maps['B'];
  this.G3 = hterm.VT.CharacterMap.maps['B'];

  this.GL = 'G0';
  this.GR = 'G0';

  this.savedState_ = new hterm.VT.CursorState(this);

  this.mouseReport = this.MOUSE_REPORT_DISABLED;
};

/**
 * Handle terminal mouse events.
 *
 * See the "Mouse Tracking" section of [xterm].
 */
hterm.VT.prototype.onTerminalMouse_ = function(e) {
  if (this.mouseReport == this.MOUSE_REPORT_DISABLED)
    return;

  // Temporary storage for our response.
  var response;

  // Modifier key state.
  var mod = 0;
  if (e.shiftKey)
    mod |= 4;
  if (e.metaKey || (this.terminal.keyboard.altIsMeta && e.altKey))
    mod |= 8;
  if (e.ctrlKey)
    mod |= 16;

  // TODO(rginda): We should also support mode 1005 and/or 1006 to extend the
  // coordinate space.  Though, after poking around just a little, I wasn't
  // able to get vi or emacs to use either of these modes.
  var x = String.fromCharCode(lib.f.clamp(e.terminalColumn + 32, 32, 255));
  var y = String.fromCharCode(lib.f.clamp(e.terminalRow + 32, 32, 255));

  switch (e.type) {
    case 'mousewheel':
      // Mouse wheel is treated as button 1 or 2 plus an additional 64.
      b = ((e.wheelDeltaY > 0) ? 0 : 1) + 96;
      b |= mod;
      response = '\x1b[M' + String.fromCharCode(b) + x + y;

      // Keep the terminal from scrolling.
      e.preventDefault();
      break;

    case 'mousedown':
      // Buttons are encoded as button number plus 32.
      var b = Math.min(e.which - 1, 2) + 32;

      // And mix in the modifier keys.
      b |= mod;

      response = '\x1b[M' + String.fromCharCode(b) + x + y;
      break;

    case 'mouseup':
      // Mouse up has no indication of which button was released.
      response = '\x1b[M\x23' + x + y;
      break;

    case 'mousemove':
      if (this.mouseReport == this.MOUSE_REPORT_DRAG && e.which) {
        // Standard button bits.
        b = 32 + Math.min(e.which - 1, 2);

        // Add 32 to indicate mouse motion.
        b += 32;

        // And mix in the modifier keys.
        b |= mod;

        response = '\x1b[M' + String.fromCharCode(b) + x + y;
      }

      break;

    case 'click':
    case 'dblclick':
      break;

    default:
      console.error('Unknown mouse event: ' + e.type, e);
      break;
  }

  if (response)
    this.terminal.io.sendString(response);
};

/**
 * Interpret a string of characters, displaying the results on the associated
 * terminal object.
 *
 * The buffer will be decoded according to the 'receive-encoding' preference.
 */
hterm.VT.prototype.interpret = function(buf) {
  this.parseState_.resetBuf(this.decode(buf));

  while (!this.parseState_.isComplete()) {
    var func = this.parseState_.func;
    var pos = this.parseState_.pos;
    var buf = this.parseState_.buf;

    this.parseState_.func.call(this, this.parseState_);

    if (this.parseState_.func == func && this.parseState_.pos == pos &&
        this.parseState_.buf == buf) {
      throw 'Parser did not alter the state!';
    }
  }
};

/**
 * Decode a string according to the 'receive-encoding' preference.
 */
hterm.VT.prototype.decode = function(str) {
  if (this.characterEncoding == 'utf-8')
    return this.decodeUTF8(str);

  return str;
};

/**
 * Encode a UTF-16 string as UTF-8.
 *
 * See also: https://en.wikipedia.org/wiki/UTF-16
 */
hterm.VT.prototype.encodeUTF8 = function(str) {
  return lib.encodeUTF8(str);
};

/**
 * Decode a UTF-8 string into UTF-16.
 */
hterm.VT.prototype.decodeUTF8 = function(str) {
  return this.utf8Decoder_.decode(str);
};

/**
 * The default parse function.
 *
 * This will scan the string for the first 1-byte control character (C0/C1
 * characters from [CTRL]).  Any plain text coming before the code will be
 * printed to the terminal, then the control character will be dispatched.
 */
hterm.VT.prototype.parseUnknown_ = function(parseState) {
  var self = this;

  function print(str) {
    if (self[self.GL].GL)
      str = self[self.GL].GL(str);

    if (self[self.GR].GR)
      str = self[self.GR].GR(str);

    self.terminal.print(str);
  };

  // Search for the next contiguous block of plain text.
  var buf = parseState.peekRemainingBuf();
  var nextControl = buf.search(this.cc1Pattern_);

  if (nextControl == 0) {
    // We've stumbled right into a control character.
    this.dispatch('CC1', buf.substr(0, 1), parseState);
    parseState.advance(1);
    return;
  }

  if (nextControl == -1) {
    // There are no control characters in this string.
    print(buf);
    parseState.reset();
    return;
  }

  print(buf.substr(0, nextControl));
  this.dispatch('CC1', buf.substr(nextControl, 1), parseState);
  parseState.advance(nextControl + 1);
};

/**
 * Parse a Control Sequence Introducer code and dispatch it.
 *
 * See [CSI] for some useful information about these codes.
 */
hterm.VT.prototype.parseCSI_ = function(parseState) {
  var ch = parseState.peekChar();
  var args = parseState.args;

  if (ch >= '@' && ch <= '~') {
    // This is the final character.
    this.dispatch('CSI', this.leadingModifier_ + this.trailingModifier_ + ch,
                  parseState);
    parseState.resetParseFunction();

  } else if (ch == ';') {
    // Parameter delimiter.
    if (this.trailingModifier_) {
      // Parameter delimiter after the trailing modifier.  That's a paddlin'.
      parseState.resetParseFunction();

    } else {
      if (!args.length) {
        // They omitted the first param, we need to supply it.
        args.push('');
      }

      args.push('');
    }

  } else if (ch >= '0' && ch <= '9') {
    // Next byte in the current parameter.

    if (this.trailingModifier_) {
      // Numeric parameter after the trailing modifier.  That's a paddlin'.
      parseState.resetParseFunction();
    } else {
      if (!args.length) {
        args[0] = ch;
      } else {
        args[args.length - 1] += ch;
      }
    }

  } else if (ch >= ' ' && ch <= '?' && ch != ':') {
    // Modifier character.
    if (!args.length) {
      this.leadingModifier_ += ch;
    } else {
      this.trailingModifier_ += ch;
    }

  } else if (this.cc1Pattern_.test(ch)) {
    // Control character.
    this.dispatch('CC1', ch, parseState);

  } else {
    // Unexpected character in sequence, bail out.
    parseState.resetParseFunction();
  }

  parseState.advance(1);
};

/**
 * Skip over the string until the next String Terminator (ST, 'ESC \') or
 * Bell (BEL, '\x07').
 *
 * The string is accumulated in parseState.args[0].  Make sure to reset the
 * arguments (with parseState.resetArguments) before starting the parse.
 *
 * You can detect that parsing in complete by checking that the parse
 * function has changed back to the default parse function.
 *
 * If we encounter more than maxStringSequence characters, we send back
 * the unterminated sequence to be re-parsed with the default parser function.
 *
 * @return {boolean} If true, parsing is ongoing or complete.  If false, we've
 *     exceeded the max string sequence.
 */
hterm.VT.prototype.parseUntilStringTerminator_ = function(parseState) {
  var buf = parseState.peekRemainingBuf();
  var nextTerminator = buf.search(/(\x1b\\|\x07)/);
  var args = parseState.args;

  if (!args.length) {
    args[0] = '';
    args[1] = new Date();
  }

  if (nextTerminator == -1) {
    // No terminator here, have to wait for the next string.

    args[0] += buf;

    var abortReason;

    if (args[0].length > this.maxStringSequence)
      abortReason = 'too long: ' + args[0].length;

    if (args[0].indexOf('\x1b') != -1)
      abortReason = 'embedded escape: ' + args[0].indexOf('\x1b');

    if (new Date() - args[1] > this.oscTimeLimit_)
      abortReason = 'timeout expired: ' + new Date() - args[1];

    if (abortReason) {
      console.log('parseUntilStringTerminator_: aborting: ' + abortReason,
                  args[0]);
      parseState.reset(args[0]);
      return false;
    }

    parseState.advance(buf.length);
    return true;
  }

  if (args[0].length + nextTerminator > this.maxStringSequence) {
    // We found the end of the sequence, but we still think it's too long.
    parseState.reset(args[0] + buf);
    return false;
  }

  args[0] += buf.substr(0, nextTerminator);

  parseState.resetParseFunction();
  parseState.advance(nextTerminator +
                     (buf.substr(nextTerminator, 1) == '\x1b' ? 2 : 1));

  return true;
};

/**
 * Dispatch to the function that handles a given CC1, ESC, or CSI or VT52 code.
 */
hterm.VT.prototype.dispatch = function(type, code, parseState) {
  var handler = hterm.VT[type][code];
  if (!handler) {
    if (this.warnUnimplemented)
      console.warn('Unknown ' + type + ' code: ' + JSON.stringify(code));
    return;
  }

  if (handler == hterm.VT.ignore) {
    if (this.warnUnimplemented)
      console.warn('Ignored ' + type + ' code: ' + JSON.stringify(code));
    return;
  }

  if (type == 'CC1' && code > '\x7f' && !this.enable8BitControl) {
    // It's kind of a hack to put this here, but...
    //
    // If we're dispatching a 'CC1' code, and it's got the eighth bit set,
    // but we're not supposed to handle 8-bit codes?  Just ignore it.
    //
    // This prevents an errant (DCS, '\x90'), (OSC, '\x9d'), (PM, '\x9e') or
    // (APC, '\x9f') from locking up the terminal waiting for its expected
    // (ST, '\x9c') or (BEL, '\x07').
    console.warn('Ignoring 8-bit control code: 0x' +
                 code.charCodeAt(0).toString(16));
    return;
  }

  handler.apply(this, [parseState, code]);
};

/**
 * Set one of the ANSI defined terminal mode bits.
 *
 * Invoked in response to SM/RM.
 *
 * Expected values for code:
 *   2 - Keyboard Action Mode (AM).  Will not implement.
 *   4 - Insert Mode (IRM).
 *   12 - Send/receive (SRM).  Will not implement.
 *   20 - Automatic Newline (LNM).
 *
 * Unexpected and unimplemented values are silently ignored.
 */
hterm.VT.prototype.setANSIMode = function(code, state) {
  if (code == '4') {
    this.terminal.setInsertMode(state);
  } else if (code == '20') {
    this.terminal.setAutoCarriageReturn(state);
  } else if (this.warnUnimplemented) {
    console.warn('Unimplemented ANSI Mode: ' + code);
  }
};

/**
 * Set or reset one of the DEC Private modes.
 *
 * Invoked in response to DECSET/DECRST.
 *
 * Expected values for code:
 *      1 - Application Cursor Keys (DECCKM).
 *      2 - [!] Designate USASCII for character sets G0-G3 (DECANM), and set
 *          VT100 mode.
 *      3 - 132 Column Mode (DECCOLM).
 *      4 - [x] Smooth (Slow) Scroll (DECSCLM).
 *      5 - Reverse Video (DECSCNM).
 *      6 - Origin Mode (DECOM).
 *      7 - Wraparound Mode (DECAWM).
 *      8 - [x] Auto-repeat Keys (DECARM).
 *      9 - [!] Send Mouse X & Y on button press.
 *     10 - [x] Show toolbar (rxvt).
 *     12 - Start Blinking Cursor (att610).
 *     18 - [!] Print form feed (DECPFF).
 *     19 - [x] Set print extent to full screen (DECPEX).
 *     25 - Show Cursor (DECTCEM).
 *     30 - [!] Show scrollbar (rxvt).
 *     35 - [x] Enable font-shifting functions (rxvt).
 *     38 - [x] Enter Tektronix Mode (DECTEK).
 *     40 - Allow 80 - 132 Mode.
 *     41 - [!] more(1) fix (see curses resource).
 *     42 - [!] Enable Nation Replacement Character sets (DECNRCM).
 *     44 - [!] Turn On Margin Bell.
 *     45 - Reverse-wraparound Mode.
 *     46 - [x] Start Logging.
 *     47 - [!] Use Alternate Screen Buffer.
 *     66 - [!] Application keypad (DECNKM).
 *     67 - Backarrow key sends backspace (DECBKM).
 *   1000 - Send Mouse X & Y on button press and release.  (MOUSE_REPORT_CLICK)
 *   1001 - [!] Use Hilite Mouse Tracking.
 *   1002 - Use Cell Motion Mouse Tracking.  (MOUSE_REPORT_DRAG)
 *   1003 - [!] Use All Motion Mouse Tracking.
 *   1004 - [!] Send FocusIn/FocusOut events.
 *   1005 - [!] Enable Extended Mouse Mode.
 *   1010 - Scroll to bottom on tty output (rxvt).
 *   1011 - Scroll to bottom on key press (rxvt).
 *   1034 - [x] Interpret "meta" key, sets eighth bit.
 *   1035 - [x] Enable special modifiers for Alt and NumLock keys.
 *   1036 - Send ESC when Meta modifies a key.
 *   1037 - [!] Send DEL from the editing-keypad Delete key.
 *   1039 - Send ESC when Alt modifies a key.
 *   1040 - [x] Keep selection even if not highlighted.
 *   1041 - [x] Use the CLIPBOARD selection.
 *   1042 - [!] Enable Urgency window manager hint when Control-G is received.
 *   1043 - [!] Enable raising of the window when Control-G is received.
 *   1047 - [!] Use Alternate Screen Buffer.
 *   1048 - Save cursor as in DECSC.
 *   1049 - Save cursor as in DECSC and use Alternate Screen Buffer, clearing
 *          it first. (This may be disabled by the titeInhibit resource). This
 *          combines the effects of the 1047 and 1048 modes. Use this with
 *          terminfo-based applications rather than the 47 mode.
 *   1050 - [!] Set terminfo/termcap function-key mode.
 *   1051 - [x] Set Sun function-key mode.
 *   1052 - [x] Set HP function-key mode.
 *   1053 - [x] Set SCO function-key mode.
 *   1060 - [x] Set legacy keyboard emulation (X11R6).
 *   1061 - [!] Set VT220 keyboard emulation.
 *   2004 - Set bracketed paste mode.
 *
 * [!] - Not currently implemented, may be in the future.
 * [x] - Will not implement.
 */
hterm.VT.prototype.setDECMode = function(code, state) {
  switch (code) {
    case '1':  // DECCKM
      this.terminal.keyboard.applicationCursor = state;
      break;

    case '3':  // DECCOLM
      if (this.allowColumnWidthChanges_) {
        this.terminal.setWidth(state ? 132 : 80);

        this.terminal.clearHome();
        this.terminal.setVTScrollRegion(null, null);
      }
      break;

    case '5':  // DECSCNM
      this.terminal.setReverseVideo(state);
      break;

    case '6':  // DECOM
      this.terminal.setOriginMode(state);
      break;

    case '7':  // DECAWM
      this.terminal.setWraparound(state);
      break;

    case '12':  // att610
      if (this.enableDec12)
        this.terminal.setCursorBlink(state);
      break;

    case '25':  // DECTCEM
      this.terminal.setCursorVisible(state);
      break;

    case '40':  // no-spec
      this.terminal.allowColumnWidthChanges_ = state;
      break;

    case '45':  // no-spec
      this.terminal.setReverseWraparound(state);
      break;

    case '67':  // DECBKM
      this.terminal.keyboard.backspaceSendsBackspace = state;
      break;

    case '1000':  // Report on mouse clicks only.
      this.mouseReport = (
          state ? this.MOUSE_REPORT_CLICK : this.MOUSE_REPORT_DISABLED);
      break;

    case '1002':  // Report on mouse clicks and drags
      this.mouseReport = (
          state ? this.MOUSE_REPORT_DRAG : this.MOUSE_REPORT_DISABLED);
      break;

    case '1010':  // rxvt
      this.terminal.scrollOnOutput = state;
      break;

    case '1011':  // rxvt
      this.terminal.scrollOnKeystroke = state;
      break;

    case '1036':  // no-spec
      this.terminal.keyboard.metaSendsEscape = state;
      break;

    case '1039':  // no-spec
      if (state) {
        if (!this.terminal.keyboard.previousAltSendsWhat_) {
          this.terminal.keyboard.previousAltSendsWhat_ =
              this.terminal.keyboard.altSendsWhat;
          this.terminal.keyboard.altSendsWhat = 'escape';
        }
      } else if (this.terminal.keyboard.previousAltSendsWhat_) {
        this.terminal.keyboard.altSendsWhat =
            this.terminal.keyboard.previousAltSendsWhat_;
        this.terminal.keyboard.previousAltSendsWhat_ = null;
      }
      break;

    case '47':
    case '1047':  // no-spec
      this.terminal.setAlternateMode(state);
      break;

    case '1048':  // Save cursor as in DECSC.
      this.savedState_.save();

    case '1049':  // 1047 + 1048 + clear.
      if (state) {
        this.savedState_.save();
        this.terminal.setAlternateMode(state);
        this.terminal.clear();
      } else {
        this.terminal.setAlternateMode(state);
        this.savedState_.restore();
      }

      break;

    case '2004':  // Bracketed paste mode.
      this.terminal.setBracketedPaste(state);
      break;

    default:
      if (this.warnUnimplemented)
        console.warn('Unimplemented DEC Private Mode: ' + code);
      break;
  }
};

/**
 * Function shared by control characters and escape sequences that are
 * ignored.
 */
hterm.VT.ignore = function() {};

/**
 * Collection of control characters expressed in a single byte.
 *
 * This includes the characters from the C0 and C1 sets (see [CTRL]) that we
 * care about.  Two byte versions of the C1 codes are defined in the
 * hterm.VT.ESC collection.
 *
 * The 'CC1' mnemonic here refers to the fact that these are one-byte Control
 * Codes.  It's only used in this source file and not defined in any of the
 * referenced documents.
 */
hterm.VT.CC1 = {};

/**
 * Collection of two-byte and three-byte sequences starting with ESC.
 */
hterm.VT.ESC = {};

/**
 * Collection of CSI (Control Sequence Introducer) sequences.
 *
 * These sequences begin with 'ESC [', and may take zero or more arguments.
 */
hterm.VT.CSI = {};

/**
 * Collection of OSC (Operating System Control) sequences.
 *
 * These sequences begin with 'ESC ]', followed by a function number and a
 * string terminated by either ST or BEL.
 */
hterm.VT.OSC = {};

/**
 * Collection of VT52 sequences.
 *
 * When in VT52 mode, other sequences are disabled.
 */
hterm.VT.VT52 = {};

/**
 * Null (NUL).
 *
 * Silently ignored.
 */
hterm.VT.CC1['\x00'] = function () {};

/**
 * Enquiry (ENQ).
 *
 * Transmit answerback message.
 *
 * The default answerback message in xterm is an empty string, so we just
 * ignore this.
 */
hterm.VT.CC1['\x05'] = hterm.VT.ignore;

/**
 * Ring Bell (BEL).
 */
hterm.VT.CC1['\x07'] = function() {
  this.terminal.ringBell();
};

/**
 * Backspace (BS).
 *
 * Move the cursor to the left one character position, unless it is at the
 * left margin, in which case no action occurs.
 */
hterm.VT.CC1['\x08'] = function() {
  this.terminal.cursorLeft(1);
};

/**
 * Horizontal Tab (HT).
 *
 * Move the cursor to the next tab stop, or to the right margin if no further
 * tab stops are present on the line.
 */
hterm.VT.CC1['\x09'] = function() {
  this.terminal.forwardTabStop();
};

/**
 * Line Feed (LF).
 *
 * This code causes a line feed or a new line operation.  See Automatic
 * Newline (LNM).
 */
hterm.VT.CC1['\x0a'] = function() {
  this.terminal.formFeed();
};

/**
 * Vertical Tab (VT).
 *
 * Interpreted as LF.
 */
hterm.VT.CC1['\x0b'] = hterm.VT.CC1['\x0a'];

/**
 * Form Feed (FF).
 *
 * Interpreted as LF.
 */
hterm.VT.CC1['\x0c'] = function() {
  this.terminal.formFeed();
};

/**
 * Carriage Return (CR).
 *
 * Move cursor to the left margin on the current line.
 */
hterm.VT.CC1['\x0d'] = function() {
  this.terminal.setCursorColumn(0);
};

/**
 * Shift Out (SO), aka Lock Shift 0 (LS1).
 *
 * Invoke G1 character set in GL.
 */
hterm.VT.CC1['\x0e'] = function() {
  this.GL = 'G1';
};

/**
 * Shift In (SI), aka Lock Shift 0 (LS0).
 *
 * Invoke G0 character set in GL.
 */
hterm.VT.CC1['\x0f'] = function() {
  this.GL = 'G0';
};

/**
 * Transmit On (XON).
 *
 * Not currently implemented.
 *
 * TODO(rginda): Implement?
 */
hterm.VT.CC1['\x11'] = hterm.VT.ignore;

/**
 * Transmit Off (XOFF).
 *
 * Not currently implemented.
 *
 * TODO(rginda): Implement?
 */
hterm.VT.CC1['\x13'] = hterm.VT.ignore;

/**
 * Cancel (CAN).
 *
 * If sent during a control sequence, the sequence is immediately terminated
 * and not executed.
 *
 * It also causes the error character to be displayed.
 */
hterm.VT.CC1['\x18'] = function(parseState) {
  // If we've shifted in the G1 character set, shift it back out to
  // the default character set.
  if (this.GL == 'G1') {
    this.GL = 'G0';
  }
  parseState.resetParseFunction();
  this.terminal.print('?');
};

/**
 * Substitute (SUB).
 *
 * Interpreted as CAN.
 */
hterm.VT.CC1['\x1a'] = hterm.VT.CC1['\x18'];

/**
 * Escape (ESC).
 */
hterm.VT.CC1['\x1b'] = function(parseState) {
  function parseESC(parseState) {
    var ch = parseState.consumeChar();

    if (ch == '\x1b')
      return;

    this.dispatch('ESC', ch, parseState);

    if (parseState.func == parseESC)
      parseState.resetParseFunction();
  };

  parseState.func = parseESC;
};

/**
 * Delete (DEL).
 */
hterm.VT.CC1['\x7f'] = hterm.VT.ignore;

// 8 bit control characters and their two byte equivalents, below...

/**
 * Index (IND).
 *
 * Like newline, only keep the X position
 */
hterm.VT.CC1['\x84'] =
hterm.VT.ESC['D'] = function() {
  this.terminal.lineFeed();
};

/**
 * Next Line (NEL).
 *
 * Like newline, but doesn't add lines.
 */
hterm.VT.CC1['\x85'] =
hterm.VT.ESC['E'] = function() {
  this.terminal.setCursorColumn(0);
  this.terminal.cursorDown(1);
};

/**
 * Horizontal Tabulation Set (HTS).
 */
hterm.VT.CC1['\x88'] =
hterm.VT.ESC['H'] = function() {
  this.terminal.setTabStop(this.terminal.getCursorColumn());
};

/**
 * Reverse Index (RI).
 *
 * Move up one line.
 */
hterm.VT.CC1['\x8d'] =
hterm.VT.ESC['M'] = function() {
  this.terminal.reverseLineFeed();
};

/**
 * Single Shift 2 (SS2).
 *
 * Select of G2 Character Set for the next character only.
 *
 * Not currently implemented.
 */
hterm.VT.CC1['\x8e'] =
hterm.VT.ESC['N'] = hterm.VT.ignore;

/**
 * Single Shift 3 (SS3).
 *
 * Select of G3 Character Set for the next character only.
 *
 * Not currently implemented.
 */
hterm.VT.CC1['\x8f'] =
hterm.VT.ESC['O'] = hterm.VT.ignore;

/**
 * Device Control String (DCS).
 *
 * Indicate a DCS sequence.  See Device-Control functions in [XTERM].
 * Not currently implemented.
 *
 * TODO(rginda): Consider implementing DECRQSS, the rest don't seem applicable.
 */
hterm.VT.CC1['\x90'] =
hterm.VT.ESC['P'] = function(parseState) {
  parseState.resetArguments();
  parseState.func = this.parseUntilStringTerminator_;
};

/**
 * Start of Protected Area (SPA).
 *
 * Will not implement.
 */
hterm.VT.CC1['\x96'] =
hterm.VT.ESC['V'] = hterm.VT.ignore;

/**
 * End of Protected Area (EPA).
 *
 * Will not implement.
 */
hterm.VT.CC1['\x97'] =
hterm.VT.ESC['W'] = hterm.VT.ignore;

/**
 * Start of String (SOS).
 *
 * Will not implement.
 */
hterm.VT.CC1['\x98'] =
hterm.VT.ESC['X'] = hterm.VT.ignore;

/**
 * Single Character Introducer (SCI, also DECID).
 *
 * Return Terminal ID.  Obsolete form of 'ESC [ c' (DA).
 */
hterm.VT.CC1['\x9a'] =
hterm.VT.ESC['Z'] = function() {
  this.terminal.io.sendString('\x1b[?1;2c');
};

/**
 * Control Sequence Introducer (CSI).
 *
 * The lead into most escape sequences.  See [CSI].
 */
hterm.VT.CC1['\x9b'] =
hterm.VT.ESC['['] = function(parseState) {
  parseState.resetArguments();
  this.leadingModifier_ = '';
  this.trailingModifier_ = '';
  parseState.func = this.parseCSI_;
};

/**
 * String Terminator (ST).
 *
 * Used to terminate DCS/OSC/PM/APC commands which may take string arguments.
 *
 * We don't directly handle it here, as it's only used to terminate other
 * sequences.  See the 'parseUntilStringTerminator_' method.
 */
hterm.VT.CC1['\x9c'] =
hterm.VT.ESC['\\'] = hterm.VT.ignore;

/**
 * Operating System Command (OSC).
 *
 * Commands relating to the operating system.
 */
hterm.VT.CC1['\x9d'] =
hterm.VT.ESC[']'] = function(parseState) {
  parseState.resetArguments();

  function parseOSC(parseState) {
    if (!this.parseUntilStringTerminator_(parseState)) {
      // The string sequence was too long.
      return;
    }

    if (parseState.func == parseOSC) {
      // We're not done parsing the string yet.
      return;
    }

    // We're done.
    var ary = parseState.args[0].match(/^(\d+);(.*)$/);
    if (ary) {
      parseState.args[0] = ary[2];
      this.dispatch('OSC', ary[1], parseState);
    } else {
      console.warn('Invalid OSC: ' + JSON.stringify(parseState.args[0]));
    }
  };

  parseState.func = parseOSC;
};

/**
 * Privacy Message (PM).
 *
 * Will not implement.
 */
hterm.VT.CC1['\x9e'] =
hterm.VT.ESC['^'] = function(parseState) {
  parseState.resetArguments();
  parseState.func = this.parseUntilStringTerminator_;
};

/**
 * Application Program Control (APC).
 *
 * Will not implement.
 */
hterm.VT.CC1['\x9f'] =
hterm.VT.ESC['_'] = function(parseState) {
  parseState.resetArguments();
  parseState.func = this.parseUntilStringTerminator_;
};

/**
 * ESC \x20 - Unclear to me where these originated, possibly in xterm.
 *
 * Not currently implemented:
 *   ESC \x20 F - Select 7 bit escape codes in responses (S7C1T).
 *   ESC \x20 G - Select 8 bit escape codes in responses (S8C1T).
 *                NB: We currently assume S7C1T always.
 *
 * Will not implement:
 *   ESC \x20 L - Set ANSI conformance level 1.
 *   ESC \x20 M - Set ANSI conformance level 2.
 *   ESC \x20 N - Set ANSI conformance level 3.
 */
hterm.VT.ESC['\x20'] = function(parseState) {
  parseState.func = function(parseState) {
    var ch = parseState.consumeChar();
    if (this.warnUnimplemented)
      console.warn('Unimplemented sequence: ESC 0x20 ' + ch);
    parseState.resetParseFunction();
  };
};

/**
 * DEC 'ESC #' sequences.
 *
 * Handled:
 *   ESC # 8 - DEC Screen Alignment Test (DECALN).
 *             Fills the terminal with 'E's.  Used liberally by vttest.
 *
 * Ignored:
 *   ESC # 3 - DEC double-height line, top half (DECDHL).
 *   ESC # 4 - DEC double-height line, bottom half (DECDHL).
 *   ESC # 5 - DEC single-width line (DECSWL).
 *   ESC # 6 - DEC double-width line (DECDWL).
 */
hterm.VT.ESC['#'] = function(parseState) {
  parseState.func = function(parseState) {
    var ch = parseState.consumeChar();
    if (ch == '8')
      this.terminal.fill('E');

    parseState.resetParseFunction();
  };
};

/**
 * 'ESC %' sequences, character set control.  Not currently implemented.
 *
 * To be implemented (currently ignored):
 *   ESC % @ - Set ISO 8859-1 character set.
 *   ESC % G - Set UTF-8 character set.
 *
 * All other ESC # sequences are echoed to the terminal.
 *
 * TODO(rginda): Implement.
 */
hterm.VT.ESC['%'] = function(parseState) {
  parseState.func = function(parseState) {
    var ch = parseState.consumeChar();
    if (ch != '@' && ch != 'G' && this.warnUnimplemented)
      console.warn('Unknown ESC % argument: ' + JSON.stringify(ch));
    parseState.resetParseFunction();
  };
};

/**
 * Character Set Selection (SCS).
 *
 *   ESC ( Ps - Set G0 character set (VT100).
 *   ESC ) Ps - Set G1 character set (VT220).
 *   ESC * Ps - Set G2 character set (VT220).
 *   ESC + Ps - Set G3 character set (VT220).
 *   ESC - Ps - Set G1 character set (VT300).
 *   ESC . Ps - Set G2 character set (VT300).
 *   ESC / Ps - Set G3 character set (VT300).
 *
 * Values for Ps are:
 *   0 - DEC Special Character and Line Drawing Set.
 *   A - United Kingdom (UK).
 *   B - United States (USASCII).
 *   4 - Dutch.
 *   C or 5 - Finnish.
 *   R - French.
 *   Q - French Canadian.
 *   K - German.
 *   Y - Italian.
 *   E or 6 - Norwegian/Danish.
 *   Z - Spanish.
 *   H or 7 - Swedish.
 *   = - Swiss.
 *
 * All other sequences are echoed to the terminal.
 *
 * TODO(rginda): Implement.
 */
hterm.VT.ESC['('] =
hterm.VT.ESC[')'] =
hterm.VT.ESC['*'] =
hterm.VT.ESC['+'] =
hterm.VT.ESC['-'] =
hterm.VT.ESC['.'] =
hterm.VT.ESC['/'] = function(parseState, code) {
  parseState.func = function(parseState) {
    var ch = parseState.consumeChar();
    if (ch == '\x1b') {
      parseState.resetParseFunction();
      parseState.func();
      return;
    }

    if (ch in hterm.VT.CharacterMap.maps) {
      if (code == '(') {
        this.G0 = hterm.VT.CharacterMap.maps[ch];
      } else if (code == ')' || code == '-') {
        this.G1 = hterm.VT.CharacterMap.maps[ch];
      } else if (code == '*' || code == '.') {
        this.G2 = hterm.VT.CharacterMap.maps[ch];
      } else if (code == '+' || code == '/') {
        this.G3 = hterm.VT.CharacterMap.maps[ch];
      }
    } else if (this.warnUnimplemented) {
      console.log('Invalid character set for "' + code + '": ' + ch);
    }

    parseState.resetParseFunction();
  };
};

/**
 * Back Index (DECBI).
 *
 * VT420 and up.  Not currently implemented.
 */
hterm.VT.ESC['6'] = hterm.VT.ignore;

/**
 * Save Cursor (DECSC).
 */
hterm.VT.ESC['7'] = function() {
  this.savedState_.save();
};

/**
 * Restore Cursor (DECSC).
 */
hterm.VT.ESC['8'] = function() {
  this.savedState_.restore();
};

/**
 * Forward Index (DECFI).
 *
 * VT210 and up.  Not currently implemented.
 */
hterm.VT.ESC['9'] = hterm.VT.ignore;

/**
 * Application keypad (DECPAM).
 */
hterm.VT.ESC['='] = function() {
  this.terminal.keyboard.applicationKeypad = true;
};

/**
 * Normal keypad (DECPNM).
 */
hterm.VT.ESC['>'] = function() {
  this.terminal.keyboard.applicationKeypad = false;
};

/**
 * Cursor to lower left corner of screen.
 *
 * Will not implement.
 *
 * This is only recognized by xterm when the hpLowerleftBugCompat resource is
 * set.
 */
hterm.VT.ESC['F'] = hterm.VT.ignore;

/**
 * Full Reset (RIS).
 */
hterm.VT.ESC['c'] = function() {
  this.reset();
  this.terminal.reset();
};

/**
 * Memory lock/unlock.
 *
 * Will not implement.
 */
hterm.VT.ESC['l'] =
hterm.VT.ESC['m'] = hterm.VT.ignore;

/**
 * Lock Shift 2 (LS2)
 *
 * Invoke the G2 Character Set as GL.
 */
hterm.VT.ESC['n'] = function() {
  this.GL = 'G2';
};

/**
 * Lock Shift 3 (LS3)
 *
 * Invoke the G3 Character Set as GL.
 */
hterm.VT.ESC['o'] = function() {
  this.GL = 'G3';
};

/**
 * Lock Shift 2, Right (LS3R)
 *
 * Invoke the G3 Character Set as GR.
 */
hterm.VT.ESC['|'] = function() {
  this.GR = 'G3';
};

/**
 * Lock Shift 2, Right (LS2R)
 *
 * Invoke the G2 Character Set as GR.
 */
hterm.VT.ESC['}'] = function() {
  this.GR = 'G2';
};

/**
 * Lock Shift 1, Right (LS1R)
 *
 * Invoke the G1 Character Set as GR.
 */
hterm.VT.ESC['~'] = function() {
  this.GR = 'G1';
};

/**
 * Change icon name and window title.
 *
 * We only change the window title.
 */
hterm.VT.OSC['0'] = function(parseState) {
  this.terminal.setWindowTitle(parseState.args[0]);
};

/**
 * Change window title.
 */
hterm.VT.OSC['2'] = hterm.VT.OSC['0'];

/**
 * Set/read color palette.
 */
hterm.VT.OSC['4'] = function(parseState) {
  // Args come in as a single 'index1;rgb1 ... ;indexN;rgbN' string.
  // We split on the semicolon and iterate through the pairs.
  var args = parseState.args[0].split(';');

  var pairCount = parseInt(args.length / 2);
  var colorPalette = this.terminal.getTextAttributes().colorPalette;
  var responseArray = [];

  for (var pairNumber = 0; pairNumber < pairCount; ++pairNumber) {
    var colorIndex = parseInt(args[pairNumber * 2]);
    var colorValue = args[pairNumber * 2 + 1];

    if (colorIndex >= colorPalette.length)
      continue;

    if (colorValue == '?') {
      // '?' means we should report back the current color value.
      colorValue = lib.colors.rgbToX11(colorPalette[colorIndex]);
      if (colorValue)
        responseArray.push(colorIndex + ';' + colorValue);

      continue;
    }

    colorValue = lib.colors.x11ToCSS(colorValue);
    if (colorValue)
      colorPalette[colorIndex] = colorValue;
  }

  if (responseArray.length)
    this.terminal.io.sendString('\x1b]4;' + responseArray.join(';') + '\x07');
};

/**
 * Set the cursor shape.
 *
 * Parameter is expected to be in the form "CursorShape=number", where number is
 * one of:
 *
 *   0 - Block
 *   1 - I-Beam
 *   2 - Underline
 *
 * This is a bit of a de-facto standard supported by iTerm 2 and Konsole.  See
 * also: DECSCUSR.
 *
 * Invalid numbers will restore the cursor to the block shape.
 */
hterm.VT.OSC['50'] = function(parseState) {
  var args = parseState.args[0].match(/CursorShape=(.)/i);
  if (!args) {
    console.warn('Could not parse OSC 50 args: ' + parseState.args[0]);
    return;
  }

  switch (args[1]) {
    case '1':
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.BEAM);
      break;

    case '2':
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
      break;

    default:
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
  }
};

/**
 * Set/read system clipboard.
 *
 * Read is not implemented due to security considerations.  A remote app
 * that is able to both write and read to the clipboard could essentially
 * take over your session.
 *
 * The clipboard data will be decoded according to the 'receive-encoding'
 * preference.
 */
hterm.VT.OSC['52'] = function(parseState) {
  // Args come in as a single 'clipboard;b64-data' string.  The clipboard
  // parameter is used to select which of the X clipboards to address.  Since
  // we're not integrating with X, we treat them all the same.
  var args = parseState.args[0].match(/^[cps01234567]*;(.*)/);
  if (!args)
    return;

  var data = window.atob(args[1]);
  if (data)
    this.terminal.copyStringToClipboard(this.decode(data));
};

/**
 * Insert (blank) characters (ICH).
 */
hterm.VT.CSI['@'] = function(parseState) {
  this.terminal.insertSpace(parseState.iarg(0, 1));
};

/**
 * Cursor Up (CUU).
 */
hterm.VT.CSI['A'] = function(parseState) {
  this.terminal.cursorUp(parseState.iarg(0, 1));
};

/**
 * Cursor Down (CUD).
 */
hterm.VT.CSI['B'] = function(parseState) {
  this.terminal.cursorDown(parseState.iarg(0, 1));
};

/**
 * Cursor Forward (CUF).
 */
hterm.VT.CSI['C'] = function(parseState) {
  this.terminal.cursorRight(parseState.iarg(0, 1));
};

/**
 * Cursor Backward (CUB).
 */
hterm.VT.CSI['D'] = function(parseState) {
  this.terminal.cursorLeft(parseState.iarg(0, 1));
};

/**
 * Cursor Next Line (CNL).
 *
 * This is like Cursor Down, except the cursor moves to the beginning of the
 * line as well.
 */
hterm.VT.CSI['E'] = function(parseState) {
  this.terminal.cursorDown(parseState.iarg(0, 1));
  this.terminal.setCursorColumn(0);
};

/**
 * Cursor Preceding Line (CPL).
 *
 * This is like Cursor Up, except the cursor moves to the beginning of the
 * line as well.
 */
hterm.VT.CSI['F'] = function(parseState) {
  this.terminal.cursorUp(parseState.iarg(0, 1));
  this.terminal.setCursorColumn(0);
};

/**
 * Cursor Character Absolute (CHA).
 */
hterm.VT.CSI['G'] = function(parseState) {
  this.terminal.setCursorColumn(parseState.iarg(0, 1) - 1);
};

/**
 * Cursor Position (CUP).
 */
hterm.VT.CSI['H'] = function(parseState) {
  this.terminal.setCursorPosition(parseState.iarg(0, 1) - 1,
                                  parseState.iarg(1, 1) - 1);
};

/**
 * Cursor Forward Tabulation (CHT).
 */
hterm.VT.CSI['I'] = function(parseState) {
  var count = parseState.iarg(0, 1);
  count = lib.f.clamp(count, 1, this.terminal.screenSize.width);
  for (var i = 0; i < count; i++) {
    this.terminal.forwardTabStop();
  }
};

/**
 * Erase in Display (ED, DECSED).
 */
hterm.VT.CSI['J'] =
hterm.VT.CSI['?J'] = function(parseState, code) {
  var arg = parseState.args[0];

  if (!arg || arg == '0') {
      this.terminal.eraseBelow();
  } else if (arg == '1') {
    this.terminal.eraseAbove();
  } else if (arg == '2') {
    this.terminal.clear();
  } else if (arg == '3') {
    // The xterm docs say this means "Erase saved lines", but we'll just clear
    // the display since killing the scrollback seems rude.
    this.terminal.clear();
  }
};

/**
 * Erase in line (EL, DECSEL).
 */
hterm.VT.CSI['K'] =
hterm.VT.CSI['?K'] = function(parseState, code) {
  var arg = parseState.args[0];

  if (!arg || arg == '0') {
    this.terminal.eraseToRight();
  } else if (arg == '1'){
    this.terminal.eraseToLeft();
  } else if (arg == '2') {
    this.terminal.eraseLine();
  }
};

/**
 * Insert Lines (IL).
 */
hterm.VT.CSI['L'] = function(parseState) {
  this.terminal.insertLines(parseState.iarg(0, 1));
};

/**
 * Delete Lines (DL).
 */
hterm.VT.CSI['M'] = function(parseState) {
  this.terminal.deleteLines(parseState.iarg(0, 1));
};

/**
 * Delete Characters (DCH).
 *
 * This command shifts the line contents left, starting at the cursor position.
 */
hterm.VT.CSI['P'] = function(parseState) {
  this.terminal.deleteChars(parseState.iarg(0, 1));
};

/**
 * Scroll Up (SU).
 */
hterm.VT.CSI['S'] = function(parseState) {
  this.terminal.vtScrollUp(parseState.iarg(0, 1));
};

/**
 * Scroll Down (SD).
 * Also 'Initiate highlight mouse tracking'.  Will not implement this part.
 */
hterm.VT.CSI['T'] = function(parseState) {
  if (parseState.args.length <= 1)
    this.terminal.vtScrollDown(parseState.iarg(0, 1));
};

/**
 * Reset one or more features of the title modes to the default value.
 *
 *   ESC [ > Ps T
 *
 * Normally, "reset" disables the feature. It is possible to disable the
 * ability to reset features by compiling a different default for the title
 * modes into xterm.
 *
 * Ps values:
 *   0 - Do not set window/icon labels using hexadecimal.
 *   1 - Do not query window/icon labels using hexadecimal.
 *   2 - Do not set window/icon labels using UTF-8.
 *   3 - Do not query window/icon labels using UTF-8.
 *
 * Will not implement.
 */
hterm.VT.CSI['>T'] = hterm.VT.ignore;

/**
 * Erase Characters (ECH).
 */
hterm.VT.CSI['X'] = function(parseState) {
  this.terminal.eraseToRight(parseState.iarg(0, 1));
};

/**
 * Cursor Backward Tabulation (CBT).
 */
hterm.VT.CSI['Z'] = function(parseState) {
  var count = parseState.iarg(0, 1);
  count = lib.f.clamp(count, 1, this.terminal.screenSize.width);
  for (var i = 0; i < count; i++) {
    this.terminal.backwardTabStop();
  }
};

/**
 * Character Position Absolute (HPA).
 */
hterm.VT.CSI['`'] = function(parseState) {
  this.terminal.setCursorColumn(parseState.iarg(0, 1) - 1);
};

/**
 * Repeat the preceding graphic character.
 *
 * Not currently implemented.
 */
hterm.VT.CSI['b'] = hterm.VT.ignore;

/**
 * Send Device Attributes (Primary DA).
 *
 * TODO(rginda): This is hardcoded to send back 'VT100 with Advanced Video
 * Option', but it may be more correct to send a VT220 response once
 * we fill out the 'Not currently implemented' parts.
 */
hterm.VT.CSI['c'] = function(parseState) {
  if (!parseState.args[0] || parseState.args[0] == '0') {
    this.terminal.io.sendString('\x1b[?1;2c');
  }
};

/**
 * Send Device Attributes (Secondary DA).
 *
 * TODO(rginda): This is hardcoded to send back 'VT100' but it may be more
 * correct to send a VT220 response once we fill out more 'Not currently
 * implemented' parts.
 */
hterm.VT.CSI['>c'] = function(parseState) {
  this.terminal.io.sendString('\x1b[>0;256;0c');
};

/**
 * Line Position Absolute (VPA).
 */
hterm.VT.CSI['d'] = function(parseState) {
  this.terminal.setAbsoluteCursorRow(parseState.iarg(0, 1) - 1);
};

/**
 * Horizontal and Vertical Position (HVP).
 *
 * Same as Cursor Position (CUP).
 */
hterm.VT.CSI['f'] = hterm.VT.CSI['H'];

/**
 * Tab Clear (TBC).
 */
hterm.VT.CSI['g'] = function(parseState) {
  if (!parseState.args[0] || parseState.args[0] == '0') {
    // Clear tab stop at cursor.
    this.terminal.clearTabStopAtCursor(false);
  } else if (parseState.args[0] == '3') {
    // Clear all tab stops.
    this.terminal.clearAllTabStops();
  }
};

/**
 * Set Mode (SM).
 */
hterm.VT.CSI['h'] = function(parseState) {
  for (var i = 0; i < parseState.args.length; i++) {
    this.setANSIMode(parseState.args[i], true);
  }
};

/**
 * DEC Private Mode Set (DECSET).
 */
hterm.VT.CSI['?h'] = function(parseState) {
  for (var i = 0; i < parseState.args.length; i++) {
    this.setDECMode(parseState.args[i], true);
  }
};

/**
 * Media Copy (MC).
 * Media Copy (MC, DEC Specific).
 *
 * These commands control the printer.  Will not implement.
 */
hterm.VT.CSI['i'] =
hterm.VT.CSI['?i'] = hterm.VT.ignore;

/**
 * Reset Mode (RM).
 */
hterm.VT.CSI['l'] = function(parseState) {
  for (var i = 0; i < parseState.args.length; i++) {
    this.setANSIMode(parseState.args[i], false);
  }
};

/**
 * DEC Private Mode Reset (DECRST).
 */
hterm.VT.CSI['?l'] = function(parseState) {
  for (var i = 0; i < parseState.args.length; i++) {
    this.setDECMode(parseState.args[i], false);
  }
};

/**
 * Character Attributes (SGR).
 *
 * Iterate through the list of arguments, applying the following attribute
 * changes based on the argument value...
 *
 *    0 Normal (default).
 *    1 Bold.
 *    2 Faint.
 *    3 Italic (non-xterm).
 *    4 Underlined.
 *    5 Blink (appears as Bold).
 *    7 Inverse.
 *    8 Invisible, i.e., hidden (VT300).
 *    9 Crossed out (ECMA-48).
 *   22 Normal (neither bold nor faint).
 *   23 Not italic (non-xterm).
 *   24 Not underlined.
 *   25 Steady (not blinking).
 *   27 Positive (not inverse).
 *   28 Visible, i.e., not hidden (VT300).
 *   29 Not crossed out (ECMA-48).
 *   30 Set foreground color to Black.
 *   31 Set foreground color to Red.
 *   32 Set foreground color to Green.
 *   33 Set foreground color to Yellow.
 *   34 Set foreground color to Blue.
 *   35 Set foreground color to Magenta.
 *   36 Set foreground color to Cyan.
 *   37 Set foreground color to White.
 *   39 Set foreground color to default (original).
 *   40 Set background color to Black.
 *   41 Set background color to Red.
 *   42 Set background color to Green.
 *   43 Set background color to Yellow.
 *   44 Set background color to Blue.
 *   45 Set background color to Magenta.
 *   46 Set background color to Cyan.
 *   47 Set background color to White.
 *   49 Set background color to default (original)
 *
 * Non-xterm (italic) codes have mixed support, but are supported by both
 * gnome-terminal and rxvt and are recognized as CSI codes on Wikipedia
 * (https://en.wikipedia.org/wiki/ANSI_escape_code).
 *
 * For 16-color support, the following apply.
 *
 *   90 Set foreground color to Bright Black.
 *   91 Set foreground color to Bright Red.
 *   92 Set foreground color to Bright Green.
 *   93 Set foreground color to Bright Yellow.
 *   94 Set foreground color to Bright Blue.
 *   95 Set foreground color to Bright Magenta.
 *   96 Set foreground color to Bright Cyan.
 *   97 Set foreground color to Bright White.
 *  100 Set background color to Bright Black.
 *  101 Set background color to Bright Red.
 *  102 Set background color to Bright Green.
 *  103 Set background color to Bright Yellow.
 *  104 Set background color to Bright Blue.
 *  105 Set background color to Bright Magenta.
 *  106 Set background color to Bright Cyan.
 *  107 Set background color to Bright White.
 *
 * For 88- or 256-color support, the following apply.
 *  38 ; 5 ; P Set foreground color to P.
 *  48 ; 5 ; P Set background color to P.
 *
 *  For true color (24-bit) support, the following apply.
 *  38 ; 2 ; R ; G ; B Set foreground color to rgb(R, G, B)
 *  48 ; 2 ; R ; G ; B Set background color to rgb(R, G, B)
 *
 * Note that most terminals consider "bold" to be "bold and bright".  In
 * some documents the bold state is even referred to as bright.  We interpret
 * bold as bold-bright here too, but only when the "bold" setting comes before
 * the color selection.
 */
hterm.VT.CSI['m'] = function(parseState) {
  function get256(i) {
    if (parseState.args.length < i + 2 || parseState.args[i + 1] != '5')
      return null;

    return parseState.iarg(i + 2, 0);
  }

  function getTrueColor(i) {
    if (parseState.args.length < i + 5 || parseState.args[i + 1] != '2')
      return null;
    var r = parseState.iarg(i + 2, 0);
    var g = parseState.iarg(i + 3, 0);
    var b = parseState.iarg(i + 4, 0);

    return 'rgb(' + r + ' ,' + g + ' ,' + b + ')';
  }

  var attrs = this.terminal.getTextAttributes();

  if (!parseState.args.length) {
    attrs.reset();
    return;
  }

  for (var i = 0; i < parseState.args.length; i++) {
    var arg = parseState.iarg(i, 0);

    if (arg < 30) {
      if (arg == 0) {
        attrs.reset();
      } else if (arg == 1) {
        attrs.bold = true;
      } else if (arg == 2) {
        attrs.faint = true;
      } else if (arg == 3) {
        attrs.italic = true;
      } else if (arg == 4) {
        attrs.underline = true;
      } else if (arg == 5) {
        attrs.blink = true;
      } else if (arg == 7) {  // Inverse.
        attrs.inverse = true;
      } else if (arg == 8) {  // Invisible.
        attrs.invisible = true;
      } else if (arg == 9) {
        attrs.strikethrough = true;
      } else if (arg == 22) {
        attrs.bold = false;
        attrs.faint = false;
      } else if (arg == 23) {
        attrs.italic = false;
      } else if (arg == 24) {
        attrs.underline = false;
      } else if (arg == 25) {
        attrs.blink = false;
      } else if (arg == 27) {
        attrs.inverse = false;
      } else if (arg == 28) {
        attrs.invisible = false;
      } else if (arg == 29) {
        attrs.strikethrough = false;
      }

    } else if (arg < 50) {
      // Select fore/background color from bottom half of 16 color palette
      // or from the 256 color palette or alternative specify color in fully
      // qualified rgb(r, g, b) form.
      if (arg < 38) {
        attrs.foregroundSource = arg - 30;

      } else if (arg == 38) {
        // First check for true color definition
        var trueColor = getTrueColor(i);
        if (trueColor != null) {
          attrs.foregroundSource = attrs.SRC_RGB;
          attrs.foreground = trueColor;

          i += 5;
        } else {
          // Check for 256 color
          var c = get256(i);
          if (c == null)
            break;

          i += 2;

          if (c >= attrs.colorPalette.length)
            continue;

          attrs.foregroundSource = c;
        }

      } else if (arg == 39) {
        attrs.foregroundSource = attrs.SRC_DEFAULT;

      } else if (arg < 48) {
        attrs.backgroundSource = arg - 40;

      } else if (arg == 48) {
        // First check for true color definition
        var trueColor = getTrueColor(i);
        if (trueColor != null) {
          attrs.backgroundSource = attrs.SRC_RGB;
          attrs.background = trueColor;

          i += 5;
        } else {
          // Check for 256 color
          var c = get256(i);
          if (c == null)
            break;

          i += 2;

          if (c >= attrs.colorPalette.length)
            continue;

          attrs.backgroundSource = c;
        }
      } else {
        attrs.backgroundSource = attrs.SRC_DEFAULT;
      }

    } else if (arg >= 90 && arg <= 97) {
      attrs.foregroundSource = arg - 90 + 8;

    } else if (arg >= 100 && arg <= 107) {
      attrs.backgroundSource = arg - 100 + 8;
    }
  }

  attrs.setDefaults(this.terminal.getForegroundColor(),
                    this.terminal.getBackgroundColor());
};

/**
 * Set xterm-specific keyboard modes.
 *
 * Will not implement.
 */
hterm.VT.CSI['>m'] = hterm.VT.ignore;

/**
 * Device Status Report (DSR, DEC Specific).
 *
 * 5 - Status Report. Result (OK) is CSI 0 n
 * 6 - Report Cursor Position (CPR) [row;column]. Result is CSI r ; c R
 */
hterm.VT.CSI['n'] = function(parseState) {
  if (parseState.args[0] == '5') {
    this.terminal.io.sendString('\x1b0n');
  } else if (parseState.args[0] == '6') {
    var row = this.terminal.getCursorRow() + 1;
    var col = this.terminal.getCursorColumn() + 1;
    this.terminal.io.sendString('\x1b[' + row + ';' + col + 'R');
  }
};

/**
 * Disable modifiers which may be enabled via CSI['>m'].
 *
 * Will not implement.
 */
hterm.VT.CSI['>n'] = hterm.VT.ignore;

/**
 * Device Status Report (DSR, DEC Specific).
 *
 * 6  - Report Cursor Position (CPR) [row;column] as CSI ? r ; c R
 * 15 - Report Printer status as CSI ? 1 0 n (ready) or
 *      CSI ? 1 1 n (not ready).
 * 25 - Report UDK status as CSI ? 2 0 n (unlocked) or CSI ? 2 1 n (locked).
 * 26 - Report Keyboard status as CSI ? 2 7 ; 1 ; 0 ; 0 n (North American).
 *      The last two parameters apply to VT400 & up, and denote keyboard ready
 *      and LK01 respectively.
 * 53 - Report Locator status as CSI ? 5 3 n Locator available, if compiled-in,
 *      or CSI ? 5 0 n No Locator, if not.
 */
hterm.VT.CSI['?n'] = function(parseState) {
  if (parseState.args[0] == '6') {
    var row = this.terminal.getCursorRow() + 1;
    var col = this.terminal.getCursorColumn() + 1;
    this.terminal.io.sendString('\x1b[' + row + ';' + col + 'R');
  } else if (parseState.args[0] == '15') {
    this.terminal.io.sendString('\x1b[?11n');
  } else if (parseState.args[0] == '25') {
    this.terminal.io.sendString('\x1b[?21n');
  } else if (parseState.args[0] == '26') {
    this.terminal.io.sendString('\x1b[?12;1;0;0n');
  } else if (parseState.args[0] == '53') {
    this.terminal.io.sendString('\x1b[?50n');
  }
};

/**
 * This is used by xterm to decide whether to hide the pointer cursor as the
 * user types.
 *
 * Valid values for the parameter:
 *   0 - Never hide the pointer.
 *   1 - Hide if the mouse tracking mode is not enabled.
 *   2 - Always hide the pointer.
 *
 * If no parameter is given, xterm uses the default, which is 1.
 *
 * Not currently implemented.
 */
hterm.VT.CSI['>p'] = hterm.VT.ignore;

/**
 * Soft terminal reset (DECSTR).
 */
hterm.VT.CSI['!p'] = function() {
  this.reset();
  this.terminal.softReset();
};

/**
 * Request ANSI Mode (DECRQM).
 *
 * Not currently implemented.
 */
hterm.VT.CSI['$p'] = hterm.VT.ignore;
hterm.VT.CSI['?$p'] = hterm.VT.ignore;

/**
 * Set conformance level (DECSCL).
 *
 * Not currently implemented.
 */
hterm.VT.CSI['"p'] = hterm.VT.ignore;

/**
 * Load LEDs (DECLL).
 *
 * Not currently implemented.  Could be implemented as virtual LEDs overlaying
 * the terminal if anyone cares.
 */
hterm.VT.CSI['q'] = hterm.VT.ignore;

/**
 * Set cursor style (DECSCUSR, VT520).
 *
 *   0 - Blinking block.
 *   1 - Blinking block (default).
 *   2 - Steady block.
 *   3 - Blinking underline.
 *   4 - Steady underline.
 */
hterm.VT.CSI[' q'] = function(parseState) {
  var arg = parseState.args[0];

  if (arg == '0' || arg == '1') {
    this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
    this.terminal.setCursorBlink(true);
  } else if (arg == '2') {
    this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
    this.terminal.setCursorBlink(false);
  } else if (arg == '3') {
    this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
    this.terminal.setCursorBlink(true);
  } else if (arg == '4') {
    this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
    this.terminal.setCursorBlink(false);
  } else {
    console.warn('Unknown cursor style: ' + arg);
  }
};

/**
 * Select character protection attribute (DECSCA).
 *
 * Will not implement.
 */
hterm.VT.CSI['"q'] = hterm.VT.ignore;

/**
 * Set Scrolling Region (DECSTBM).
 */
hterm.VT.CSI['r'] = function(parseState) {
  var args = parseState.args;
  var scrollTop = args[0] ? parseInt(args[0], 10) -1 : null;
  var scrollBottom = args[1] ? parseInt(args[1], 10) - 1 : null;
  this.terminal.setVTScrollRegion(scrollTop, scrollBottom);
  this.terminal.setCursorPosition(0, 0);
};

/**
 * Restore DEC Private Mode Values.
 *
 * Will not implement.
 */
hterm.VT.CSI['?r'] = hterm.VT.ignore;

/**
 * Change Attributes in Rectangular Area (DECCARA)
 *
 * Will not implement.
 */
hterm.VT.CSI['$r'] = hterm.VT.ignore;

/**
 * Save cursor (ANSI.SYS)
 */
hterm.VT.CSI['s'] = function() {
  this.savedState_.save();
};

/**
 * Save DEC Private Mode Values.
 *
 * Will not implement.
 */
hterm.VT.CSI['?s'] = hterm.VT.ignore;

/**
 * Window manipulation (from dtterm, as well as extensions).
 *
 * Will not implement.
 */
hterm.VT.CSI['t'] = hterm.VT.ignore;

/**
 * Reverse Attributes in Rectangular Area (DECRARA).
 *
 * Will not implement.
 */
hterm.VT.CSI['$t'] = hterm.VT.ignore;

/**
 * Set one or more features of the title modes.
 *
 * Will not implement.
 */
hterm.VT.CSI['>t'] = hterm.VT.ignore;

/**
 * Set warning-bell volume (DECSWBV, VT520).
 *
 * Will not implement.
 */
hterm.VT.CSI[' t'] = hterm.VT.ignore;

/**
 * Restore cursor (ANSI.SYS).
 */
hterm.VT.CSI['u'] = function() {
  this.savedState_.restore();
};

/**
 * Set margin-bell volume (DECSMBV, VT520).
 *
 * Will not implement.
 */
hterm.VT.CSI[' u'] = hterm.VT.ignore;

/**
 * Copy Rectangular Area (DECCRA, VT400 and up).
 *
 * Will not implement.
 */
hterm.VT.CSI['$v'] = hterm.VT.ignore;

/**
 * Enable Filter Rectangle (DECEFR).
 *
 * Will not implement.
 */
hterm.VT.CSI['\'w'] = hterm.VT.ignore;

/**
 * Request Terminal Parameters (DECREQTPARM).
 *
 * Not currently implemented.
 */
hterm.VT.CSI['x'] = hterm.VT.ignore;

/**
 * Select Attribute Change Extent (DECSACE).
 *
 * Will not implement.
 */
hterm.VT.CSI['*x'] = hterm.VT.ignore;

/**
 * Fill Rectangular Area (DECFRA), VT420 and up.
 *
 * Will not implement.
 */
hterm.VT.CSI['$x'] = hterm.VT.ignore;

/**
 * vt_tiledata (as used by NAOhack and UnNetHack)
 * (see https://nethackwiki.com/wiki/Vt_tiledata for more info)
 *
 * Implemented as far as we care (start a glyph and end a glyph).
 */
hterm.VT.CSI['z'] = function(parseState) {
  if (parseState.args.length < 1)
    return;
  var arg = parseState.args[0];
  if (arg == '0') {
    // Start a glyph (one parameter, the glyph number).
    if (parseState.args.length < 2)
      return;
    this.terminal.getTextAttributes().tileData = parseState.args[1];
  } else if (arg == '1') {
    // End a glyph.
    this.terminal.getTextAttributes().tileData = null;
  }
};

/**
 * Enable Locator Reporting (DECELR).
 *
 * Not currently implemented.
 */
hterm.VT.CSI['\'z'] = hterm.VT.ignore;

/**
 * Erase Rectangular Area (DECERA), VT400 and up.
 *
 * Will not implement.
 */
hterm.VT.CSI['$z'] = hterm.VT.ignore;

/**
 * Select Locator Events (DECSLE).
 *
 * Not currently implemented.
 */
hterm.VT.CSI['\'{'] = hterm.VT.ignore;

/**
 * Request Locator Position (DECRQLP).
 *
 * Not currently implemented.
 */
hterm.VT.CSI['\'|'] = hterm.VT.ignore;

/**
 * Insert Columns (DECIC), VT420 and up.
 *
 * Will not implement.
 */
hterm.VT.CSI[' }'] = hterm.VT.ignore;

/**
 * Delete P s Columns (DECDC), VT420 and up.
 *
 * Will not implement.
 */
hterm.VT.CSI[' ~'] = hterm.VT.ignore;
// SOURCE FILE: hterm/js/hterm_vt_character_map.js
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

lib.rtdep('lib.f');

/**
 * Character map object.
 *
 * @param {object} The GL mapping from input characters to output characters.
 *     The GR mapping will be automatically created.
 */
hterm.VT.CharacterMap = function(name, glmap) {
  /**
   * Short name for this character set, useful for debugging.
   */
  this.name = name;

  /**
   * The function to call to when this map is installed in GL.
   */
  this.GL = null;

  /**
   * The function to call to when this map is installed in GR.
   */
  this.GR = null;

  if (glmap)
    this.reset(glmap);
};

/**
 * @param {object} The GL mapping from input characters to output characters.
 *     The GR mapping will be automatically created.
 */
hterm.VT.CharacterMap.prototype.reset = function(glmap) {
  // Set the the GL mapping.
  this.glmap = glmap;

  var glkeys = Object.keys(this.glmap).map(function(key) {
      return '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16));
    });

  this.glre = new RegExp('[' + glkeys.join('') + ']', 'g');

  // Compute the GR mapping.
  // This is the same as GL except all keys have their MSB set.
  this.grmap = {};

  glkeys.forEach(function(glkey) {
      var grkey = String.fromCharCode(glkey.charCodeAt(0) & 0x80);
      this.grmap[grkey] = this.glmap[glkey];
    }.bind(this));

  var grkeys = Object.keys(this.grmap).map(function(key) {
      return '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16), 2);
    });

  this.grre = new RegExp('[' + grkeys.join('') + ']', 'g');

  this.GL = function(str) {
    return str.replace(this.glre,
                       function(ch) { return this.glmap[ch] }.bind(this));
  }.bind(this);

  this.GR = function(str) {
    return str.replace(this.grre,
                       function(ch) { return this.grmap[ch] }.bind(this));
  }.bind(this);
};

/**
 * Mapping from received to display character, used depending on the active
 * VT character set.
 */
hterm.VT.CharacterMap.maps = {};

/**
 * VT100 Graphic character map.
 * http://vt100.net/docs/vt220-rm/table2-4.html
 */
hterm.VT.CharacterMap.maps['0'] = new hterm.VT.CharacterMap(
    'graphic', {
      '\x60':'\u25c6',  // ` -> diamond
      '\x61':'\u2592',  // a -> grey-box
      '\x62':'\u2409',  // b -> h/t
      '\x63':'\u240c',  // c -> f/f
      '\x64':'\u240d',  // d -> c/r
      '\x65':'\u240a',  // e -> l/f
      '\x66':'\u00b0',  // f -> degree
      '\x67':'\u00b1',  // g -> +/-
      '\x68':'\u2424',  // h -> n/l
      '\x69':'\u240b',  // i -> v/t
      '\x6a':'\u2518',  // j -> bottom-right
      '\x6b':'\u2510',  // k -> top-right
      '\x6c':'\u250c',  // l -> top-left
      '\x6d':'\u2514',  // m -> bottom-left
      '\x6e':'\u253c',  // n -> line-cross
      '\x6f':'\u23ba',  // o -> scan1
      '\x70':'\u23bb',  // p -> scan3
      '\x71':'\u2500',  // q -> scan5
      '\x72':'\u23bc',  // r -> scan7
      '\x73':'\u23bd',  // s -> scan9
      '\x74':'\u251c',  // t -> left-tee
      '\x75':'\u2524',  // u -> right-tee
      '\x76':'\u2534',  // v -> bottom-tee
      '\x77':'\u252c',  // w -> top-tee
      '\x78':'\u2502',  // x -> vertical-line
      '\x79':'\u2264',  // y -> less-equal
      '\x7a':'\u2265',  // z -> greater-equal
      '\x7b':'\u03c0',  // { -> pi
      '\x7c':'\u2260',  // | -> not-equal
      '\x7d':'\u00a3',  // } -> british-pound
      '\x7e':'\u00b7',  // ~ -> dot
    });

/**
 * British character map.
 * http://vt100.net/docs/vt220-rm/table2-5.html
 */
hterm.VT.CharacterMap.maps['A'] = new hterm.VT.CharacterMap(
    'british', {
      '\x23': '\u00a3',  // # -> british-pound
    });

/**
 * US ASCII map, no changes.
 */
hterm.VT.CharacterMap.maps['B'] = new hterm.VT.CharacterMap(
    'us', null);

/**
 * Dutch character map.
 * http://vt100.net/docs/vt220-rm/table2-6.html
 */
hterm.VT.CharacterMap.maps['4'] = new hterm.VT.CharacterMap(
    'dutch', {
      '\x23': '\u00a3',  // # -> british-pound

      '\x40': '\u00be',  // @ -> 3/4

      '\x5b': '\u0132',  // [ -> 'ij' ligature (xterm goes with \u00ff?)
      '\x5c': '\u00bd',  // \ -> 1/2
      '\x5d': '\u007c',  // ] -> vertical bar

      '\x7b': '\u00a8',  // { -> two dots
      '\x7c': '\u0066',  // | -> f
      '\x7d': '\u00bc',  // } -> 1/4
      '\x7e': '\u00b4',  // ~ -> acute
    });

/**
 * Finnish character map.
 * http://vt100.net/docs/vt220-rm/table2-7.html
 */
hterm.VT.CharacterMap.maps['C'] =
hterm.VT.CharacterMap.maps['5'] = new hterm.VT.CharacterMap(
    'finnish', {
      '\x5b': '\u00c4',  // [ -> 'A' umlaut
      '\x5c': '\u00d6',  // \ -> 'O' umlaut
      '\x5d': '\u00c5',  // ] -> 'A' ring
      '\x5e': '\u00dc',  // ~ -> 'u' umlaut

      '\x60': '\u00e9',  // ` -> 'e' acute

      '\x7b': '\u00e4',  // { -> 'a' umlaut
      '\x7c': '\u00f6',  // | -> 'o' umlaut
      '\x7d': '\u00e5',  // } -> 'a' ring
      '\x7e': '\u00fc',  // ~ -> 'u' umlaut
    });

/**
 * French character map.
 * http://vt100.net/docs/vt220-rm/table2-8.html
 */
hterm.VT.CharacterMap.maps['R'] = new hterm.VT.CharacterMap(
    'french', {
      '\x23': '\u00a3',  // # -> british-pound

      '\x40': '\u00e0',  // @ -> 'a' grave

      '\x5b': '\u00b0',  // [ -> ring
      '\x5c': '\u00e7',  // \ -> 'c' cedilla
      '\x5d': '\u00a7',  // ] -> section symbol (double s)

      '\x7b': '\u00e9',  // { -> 'e' acute
      '\x7c': '\u00f9',  // | -> 'u' grave
      '\x7d': '\u00e8',  // } -> 'e' grave
      '\x7e': '\u00a8',  // ~ -> umlaut
    });

/**
 * French Canadian character map.
 * http://vt100.net/docs/vt220-rm/table2-9.html
 */
hterm.VT.CharacterMap.maps['Q'] = new hterm.VT.CharacterMap(
    'french canadian', {
      '\x40': '\u00e0',  // @ -> 'a' grave

      '\x5b': '\u00e2',  // [ -> 'a' circumflex
      '\x5c': '\u00e7',  // \ -> 'c' cedilla
      '\x5d': '\u00ea',  // ] -> 'e' circumflex
      '\x5e': '\u00ee',  // ^ -> 'i' circumflex

      '\x60': '\u00f4',  // ` -> 'o' circumflex

      '\x7b': '\u00e9',  // { -> 'e' acute
      '\x7c': '\u00f9',  // | -> 'u' grave
      '\x7d': '\u00e8',  // } -> 'e' grave
      '\x7e': '\u00fb',  // ~ -> 'u' circumflex
    });

/**
 * German character map.
 * http://vt100.net/docs/vt220-rm/table2-10.html
 */
hterm.VT.CharacterMap.maps['K'] = new hterm.VT.CharacterMap(
    'german', {
      '\x40': '\u00a7',  // @ -> section symbol (double s)

      '\x5b': '\u00c4',  // [ -> 'A' umlaut
      '\x5c': '\u00d6',  // \ -> 'O' umlaut
      '\x5d': '\u00dc',  // ] -> 'U' umlaut

      '\x7b': '\u00e4',  // { -> 'a' umlaut
      '\x7c': '\u00f6',  // | -> 'o' umlaut
      '\x7d': '\u00fc',  // } -> 'u' umlaut
      '\x7e': '\u00df',  // ~ -> eszett
    });

/**
 * Italian character map.
 * http://vt100.net/docs/vt220-rm/table2-11.html
 */
hterm.VT.CharacterMap.maps['Y'] = new hterm.VT.CharacterMap(
    'italian', {
      '\x23': '\u00a3',  // # -> british-pound

      '\x40': '\u00a7',  // @ -> section symbol (double s)

      '\x5b': '\u00b0',  // [ -> ring
      '\x5c': '\u00e7',  // \ -> 'c' cedilla
      '\x5d': '\u00e9',  // ] -> 'e' acute

      '\x60': '\u00f9',  // ` -> 'u' grave

      '\x7b': '\u00e0',  // { -> 'a' grave
      '\x7c': '\u00f2',  // | -> 'o' grave
      '\x7d': '\u00e8',  // } -> 'e' grave
      '\x7e': '\u00ec',  // ~ -> 'i' grave
    });

/**
 * Norwegian/Danish character map.
 * http://vt100.net/docs/vt220-rm/table2-12.html
 */
hterm.VT.CharacterMap.maps['E'] =
hterm.VT.CharacterMap.maps['6'] = new hterm.VT.CharacterMap(
    'norwegian/danish', {
      '\x40': '\u00c4',  // @ -> 'A' umlaut

      '\x5b': '\u00c6',  // [ -> 'AE' ligature
      '\x5c': '\u00d8',  // \ -> 'O' stroke
      '\x5d': '\u00c5',  // ] -> 'A' ring
      '\x5e': '\u00dc',  // ^ -> 'U' umlaut

      '\x60': '\u00e4',  // ` -> 'a' umlaut

      '\x7b': '\u00e6',  // { -> 'ae' ligature
      '\x7c': '\u00f8',  // | -> 'o' stroke
      '\x7d': '\u00e5',  // } -> 'a' ring
      '\x7e': '\u00fc',  // ~ -> 'u' umlaut
    });

/**
 * Spanish character map.
 * http://vt100.net/docs/vt220-rm/table2-13.html
 */
hterm.VT.CharacterMap.maps['Z'] = new hterm.VT.CharacterMap(
    'spanish', {
      '\x23': '\u00a3',  // # -> british-pound

      '\x40': '\u00a7',  // @ -> section symbol (double s)

      '\x5b': '\u00a1',  // [ -> '!' inverted
      '\x5c': '\u00d1',  // \ -> 'N' tilde
      '\x5d': '\u00bf',  // ] -> '?' inverted

      '\x7b': '\u00b0',  // { -> ring
      '\x7c': '\u00f1',  // | -> 'n' tilde
      '\x7d': '\u00e7',  // } -> 'c' cedilla
    });

/**
 * Swedish character map.
 * http://vt100.net/docs/vt220-rm/table2-14.html
 */
hterm.VT.CharacterMap.maps['7'] =
hterm.VT.CharacterMap.maps['H'] = new hterm.VT.CharacterMap(
    'swedish', {
      '\x40': '\u00c9',  // @ -> 'E' acute

      '\x5b': '\u00c4',  // [ -> 'A' umlaut
      '\x5c': '\u00d6',  // \ -> 'O' umlaut
      '\x5d': '\u00c5',  // ] -> 'A' ring
      '\x5e': '\u00dc',  // ^ -> 'U' umlaut

      '\x60': '\u00e9',  // ` -> 'e' acute

      '\x7b': '\u00e4',  // { -> 'a' umlaut
      '\x7c': '\u00f6',  // | -> 'o' umlaut
      '\x7d': '\u00e5',  // } -> 'a' ring
      '\x7e': '\u00fc',  // ~ -> 'u' umlaut
    });

/**
 * Swiss character map.
 * http://vt100.net/docs/vt220-rm/table2-15.html
 */
hterm.VT.CharacterMap.maps['='] = new hterm.VT.CharacterMap(
    'swiss', {
      '\x23': '\u00f9',  // # -> 'u' grave

      '\x40': '\u00e0',  // @ -> 'a' grave

      '\x5b': '\u00e9',  // [ -> 'e' acute
      '\x5c': '\u00e7',  // \ -> 'c' cedilla
      '\x5d': '\u00ea',  // ] -> 'e' circumflex
      '\x5e': '\u00ee',  // ^ -> 'i' circumflex
      '\x5f': '\u00e8',  // _ -> 'e' grave

      '\x60': '\u00f4',  // ` -> 'o' circumflex

      '\x7b': '\u00e4',  // { -> 'a' umlaut
      '\x7c': '\u00f6',  // | -> 'o' umlaut
      '\x7d': '\u00fc',  // } -> 'u' umlaut
      '\x7e': '\u00fb',  // ~ -> 'u' circumflex
    });
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''
);

lib.resource.add('hterm/concat/date', 'text/plain',
'Tue, 25 Apr 2017 15:12:45 +0000' +
''
);

lib.resource.add('hterm/changelog/version', 'text/plain',
'1.62' +
''
);

lib.resource.add('hterm/changelog/date', 'text/plain',
'2017-04-17' +
''
);

lib.resource.add('hterm/git/HEAD', 'text/plain',
'git rev-parse HEAD' +
''
);