Make Weston desktop-shell panel configurable (backport)

The Weston panel is the top bar containing launcher and
clock icons. We might want to disable it for demos.

This can now be done by adding in "weston.ini" :
[shell]
panel-location=none

This is a backport from upstream Weston :
http://cgit.freedesktop.org/wayland/weston/patch/
?id=e67118c80ad411ac46b7096aae2635510c80ea6d

Change-Id: Iaf60f612f8e01e7aa51f8a0558de00f26d36aee8
Signed-off-by: Manuel Bachmann <mbc@iot.bzh>

3 files changed, 105 insertions, 0 deletions

diff --git a/meta-agl/recipes-graphics/wayland/weston/0001-desktop-shell-add-option-to-avoid-creating-the-panel.patch b/meta-agl/recipes-graphics/wayland/weston/0001-desktop-shell-add-option-to-avoid-creating-the-panel.patch
new file mode 100644
index 000000000..5e8c3c9dc
--- /dev/null
+++ b/meta-agl/recipes-graphics/wayland/weston/0001-desktop-shell-add-option-to-avoid-creating-the-panel.patch
@@ -0,0 +1,99 @@
+From e67118c80ad411ac46b7096aae2635510c80ea6d Mon Sep 17 00:00:00 2001
+From: Jonny Lamb <jonny.lamb@collabora.co.uk>
+Date: Tue, 12 Aug 2014 15:07:51 +0200
+Subject: desktop-shell: add option to avoid creating the panel
+
+This option is so we can disable showing any panel at all. The default
+is to continue showing the panel and no example is added to weston.ini
+because it's an uncommon request.
+
+Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
+---
+
+--- a/clients/desktop-shell.c	2015-11-05 11:51:26.272052133 +0000
++++ b/clients/desktop-shell.c	2015-11-05 11:56:19.666887702 +0000
+@@ -1130,7 +1130,8 @@
+ output_destroy(struct output *output)
+ {
+ 	background_destroy(output->background);
+-	panel_destroy(output->panel);
++	if (output->panel)
++		panel_destroy(output->panel);
+ 	wl_output_destroy(output->output);
+ 	wl_list_remove(&output->link);
+ 
+@@ -1160,7 +1161,8 @@
+ {
+ 	struct output *output = data;
+ 
+-	window_set_buffer_transform(output->panel->window, transform);
++	if (output->panel)
++		window_set_buffer_transform(output->panel->window, transform);
+ 	window_set_buffer_transform(output->background->window, transform);
+ }
+ 
+@@ -1187,7 +1189,8 @@
+ {
+ 	struct output *output = data;
+ 
+-	window_set_buffer_scale(output->panel->window, scale);
++	if (output->panel)
++		window_set_buffer_scale(output->panel->window, scale);
+ 	window_set_buffer_scale(output->background->window, scale);
+ }
+ 
+@@ -1198,15 +1201,36 @@
+ 	output_handle_scale
+ };
+ 
++static int
++want_panel(struct desktop *desktop)
++{
++	struct weston_config_section *s;
++	char *location = NULL;
++	int ret = 1;
++
++	s = weston_config_get_section(desktop->config, "shell", NULL, NULL);
++	weston_config_section_get_string(s, "panel-location",
++	                                 &location, "top");
++
++	if (strcmp(location, "top") != 0)
++		ret = 0;
++
++	free(location);
++
++	return ret;
++}
++
+ static void
+ output_init(struct output *output, struct desktop *desktop)
+ {
+ 	struct wl_surface *surface;
+ 
+-	output->panel = panel_create(desktop);
+-	surface = window_get_wl_surface(output->panel->window);
+-	desktop_shell_set_panel(desktop->shell,
+-				output->output, surface);
++	if (want_panel(desktop)) {
++		output->panel = panel_create(desktop);
++		surface = window_get_wl_surface(output->panel->window);
++		desktop_shell_set_panel(desktop->shell,
++					output->output, surface);
++	}
+ 
+ 	output->background = background_create(desktop);
+ 	surface = window_get_wl_surface(output->background->window);
+--- a/man/weston.ini.man	2015-11-05 11:56:36.763111313 +0000
++++ b/man/weston.ini.man	2015-11-05 12:06:57.097226512 +0000
+@@ -186,6 +186,11 @@
+ .fi
+ .RE
+ .TP 7
++.BI "panel-location=" top
++sets the location of the panel (string). Can be
++.B top,
++.B none.
++.TP 7
+ .BI "locking=" true
+ enables screen locking (boolean).
+ .TP 7
diff --git a/meta-agl/recipes-graphics/wayland/weston/weston.ini b/meta-agl/recipes-graphics/wayland/weston/weston.ini
index 3241204b6..b533d8908 100644
--- a/meta-agl/recipes-graphics/wayland/weston/weston.ini
+++ b/meta-agl/recipes-graphics/wayland/weston/weston.ini
@@ -1,2 +1,7 @@
 [core]
 shell=desktop-shell.so
+
+[shell]
+locking=true
+# Uncomment below to hide panel
+#panel-location=none
diff --git a/meta-agl/recipes-graphics/wayland/weston_1.5.0.bbappend b/meta-agl/recipes-graphics/wayland/weston_1.5.0.bbappend
index fd195e90d..cb8d11ed9 100644
--- a/meta-agl/recipes-graphics/wayland/weston_1.5.0.bbappend
+++ b/meta-agl/recipes-graphics/wayland/weston_1.5.0.bbappend
@@ -1,6 +1,7 @@
 FILESEXTRAPATHS_append := ":${THISDIR}/${PN}"
 
 SRC_URI_append = "\
+    file://0001-desktop-shell-add-option-to-avoid-creating-the-panel.patch \
     file://weston.service \
     file://weston.ini \
     "