From bbf2e6ebbd9c051775f43e1e3c3a2f41322342e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20D=C3=ADaz?= <daniel.diaz@linaro.org>
Date: Fri, 21 Oct 2016 14:03:13 -0500
Subject: [PATCH] Add configuration option for no input device.
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[Backported from master, 75b7197.]

As it has been discussed in the past [1], running Weston
without any input device at launch might be beneficial for
some use cases.

Certainly, it's best for the vast majority of users (and
the project) to require an input device to be present, as
to avoid frustration and hassle, but for those brave souls
that so prefer, this patch lets them run without any input
device at all.

This introduces a simple configuration in weston.ini:
  [core]
  require-input=true

True is the default, so no behavioral change is introduced.

[1] https://lists.freedesktop.org/archives/wayland-devel/2015-November/025193.html

Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>
---
 man/weston.ini.man  | 5 +++++
 src/compositor.h    | 4 ++++
 src/libinput-seat.c | 6 ++++++
 src/main.c          | 5 +++++
 weston.ini.in       | 1 +
 5 files changed, 21 insertions(+)

diff --git a/man/weston.ini.man b/man/weston.ini.man
index d7c4a6f..c7d0f01 100644
--- a/man/weston.ini.man
+++ b/man/weston.ini.man
@@ -169,6 +169,11 @@ time, the one specified in the command-line will be used. On the other
 hand, if none of these sets the value, default idle timeout will be
 set to 300 seconds.
 .RS
+.PP
+.RE
+.TP 7
+.BI "require-input=" true
+require an input device for launch
 
 .SH "LIBINPUT SECTION"
 The
diff --git a/src/compositor.h b/src/compositor.h
index 0bbf458..476b650 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -803,6 +803,10 @@ struct weston_compositor {
 
 	void *user_data;
 	void (*exit)(struct weston_compositor *c);
+
+	/* Whether to let the compositor run without any input device. */
+	bool require_input;
+
 };
 
 struct weston_buffer {
diff --git a/src/libinput-seat.c b/src/libinput-seat.c
index 8ce0ee0..e1fdcf0 100644
--- a/src/libinput-seat.c
+++ b/src/libinput-seat.c
@@ -255,6 +255,12 @@ udev_input_enable(struct udev_input *input)
 			devices_found = 1;
 	}
 
+	if (devices_found == 0 && !c->require_input) {
+		weston_log("warning: no input devices found, but none required "
+			   "as per configuration.\n");
+		return 0;
+	}
+
 	if (devices_found == 0) {
 		weston_log(
 			"warning: no input devices on entering Weston. "
diff --git a/src/main.c b/src/main.c
index 3279ac6..09905ea 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1298,6 +1298,7 @@ int main(int argc, char *argv[])
 	struct wl_client *primary_client;
 	struct wl_listener primary_client_destroyed;
 	struct weston_seat *seat;
+	int require_input;
 
 	const struct weston_option core_options[] = {
 		{ WESTON_OPTION_STRING, "backend", 'B', &backend },
@@ -1373,6 +1374,10 @@ int main(int argc, char *argv[])
 	if (weston_compositor_init_config(ec, config) < 0)
 		goto out;
 
+	weston_config_section_get_bool(section, "require-input",
+				       &require_input, true);
+	ec->require_input = require_input;
+
 	if (load_backend(ec, backend, &argc, argv, config) < 0) {
 		weston_log("fatal: failed to create compositor backend\n");
 		goto out;
diff --git a/weston.ini.in b/weston.ini.in
index 14a4c0c..d837fb5 100644
--- a/weston.ini.in
+++ b/weston.ini.in
@@ -2,6 +2,7 @@
 #modules=xwayland.so,cms-colord.so
 #shell=desktop-shell.so
 #gbm-format=xrgb2101010
+#require-input=true
 
 [shell]
 background-image=/usr/share/backgrounds/gnome/Aqua.jpg
-- 
1.9.1