st-texture-cache: purge on resume

With the proprietary nvidia driver, textures get garbled on suspend,
so the texture cache needs to evict all textures in that situation.

data/org.gnome.shell.gschema.xml.in

@@ -39,7 +39,7 @@
       </description>
     </key>
     <key name="favorite-apps" type="as">
-      <default>[ 'epiphany.desktop', 'evolution.desktop', 'rhythmbox.desktop', 'shotwell.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop' ]</default>
+      <default>[ 'firefox.desktop', 'evolution.desktop', 'rhythmbox.desktop', 'shotwell.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop' ]</default>
       <summary>List of desktop file IDs for favorite applications</summary>
       <description>
         The applications corresponding to these identifiers

data/theme/gnome-shell-sass/_common.scss

@@ -824,6 +824,8 @@ StScrollBar {
 
   .screencast-indicator { color: $warning_color; }
 
+  .remote-access-indicator { color: $warning_color; }
+
   &.solid {
     background-color: black;
     /* transition from transparent to solid */

js/js-resources.gresource.xml

@@ -130,6 +130,7 @@
     <file>ui/status/rfkill.js</file>
     <file>ui/status/volume.js</file>
     <file>ui/status/bluetooth.js</file>
+    <file>ui/status/remoteAccess.js</file>
     <file>ui/status/screencast.js</file>
     <file>ui/status/system.js</file>
     <file>ui/status/thunderbolt.js</file>

js/ui/appFavorites.js

@@ -41,6 +41,7 @@ const RENAMED_DESKTOP_IDS = {
     'gnotravex.desktop': 'gnome-tetravex.desktop',
     'gnotski.desktop': 'gnome-klotski.desktop',
     'gtali.desktop': 'tali.desktop',
+    'mozilla-firefox.desktop': 'firefox.desktop',
     'nautilus.desktop': 'org.gnome.Nautilus.desktop',
     'polari.desktop': 'org.gnome.Polari.desktop',
     'totem.desktop': 'org.gnome.Totem.desktop',

js/ui/background.js

@@ -264,7 +264,7 @@ var Background = new Lang.Class({
             (lm, aboutToSuspend) => {
                 if (aboutToSuspend)
                     return;
-                this._refreshAnimation();
+                this.emit('changed');
             });
 
         this._settingsChangedSignalId = this._settings.connect('changed', () => {

js/ui/main.js

@@ -207,7 +207,13 @@ function _initializeUI() {
         return true;
     });
 
-    global.display.connect('gl-video-memory-purged', loadTheme);
+    global.display.connect('gl-video-memory-purged', () => {
+	let cache = St.TextureCache.get_default();
+
+        cache.clear();
+
+        loadTheme();
+    });
 
     // Provide the bus object for gnome-session to
     // initiate logouts.

js/ui/panel.js

@@ -709,6 +709,7 @@ var AggregateMenu = new Lang.Class({
             this._bluetooth = null;
         }
 
+        this._remoteAccess = new imports.ui.status.remoteAccess.RemoteAccessApplet();
         this._power = new imports.ui.status.power.Indicator();
         this._rfkill = new imports.ui.status.rfkill.Indicator();
         this._volume = new imports.ui.status.volume.Indicator();
@@ -729,6 +730,7 @@ var AggregateMenu = new Lang.Class({
         if (this._bluetooth) {
             this._indicators.add_child(this._bluetooth.indicators);
         }
+        this._indicators.add_child(this._remoteAccess.indicators);
         this._indicators.add_child(this._rfkill.indicators);
         this._indicators.add_child(this._volume.indicators);
         this._indicators.add_child(this._power.indicators);
@@ -743,6 +745,7 @@ var AggregateMenu = new Lang.Class({
         if (this._bluetooth) {
             this.menu.addMenuItem(this._bluetooth.menu);
         }
+        this.menu.addMenuItem(this._remoteAccess.menu);
         this.menu.addMenuItem(this._location.menu);
         this.menu.addMenuItem(this._rfkill.menu);
         this.menu.addMenuItem(this._power.menu);

js/ui/status/remoteAccess.js

@@ -0,0 +1,81 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+
+const Lang = imports.lang;
+const Meta = imports.gi.Meta;
+
+const PanelMenu = imports.ui.panelMenu;
+const PopupMenu = imports.ui.popupMenu;
+
+var RemoteAccessApplet = new Lang.Class({
+    Name: 'RemoteAccessApplet',
+    Extends: PanelMenu.SystemIndicator,
+
+    _init() {
+        this.parent();
+
+        let backend = Meta.get_backend();
+        let controller = backend.get_remote_access_controller();
+
+        if (!controller)
+            return;
+
+        // We can't possibly know about all types of screen sharing on X11, so
+        // showing these controls on X11 might give a false sense of security.
+        // Thus, only enable these controls when using Wayland, where we are
+        // in control of sharing.
+        if (!Meta.is_wayland_compositor())
+            return;
+
+        this._handles = new Set();
+        this._indicator = null;
+        this._menuSection = null;
+
+        controller.connect('new-handle', (controller, handle) => {
+            this._onNewHandle(handle);
+        });
+    },
+
+    _ensureControls() {
+        if (this._indicator)
+            return;
+
+        this._indicator = this._addIndicator();
+        this._indicator.icon_name = 'screen-shared-symbolic';
+        this._indicator.add_style_class_name('remote-access-indicator');
+        this._item =
+            new PopupMenu.PopupSubMenuMenuItem(_("Screen is Being Shared"),
+                                               true);
+        this._item.menu.addAction(_("Turn off"),
+                                  () => {
+                                      for (let handle of this._handles)
+                                            handle.stop();
+                                  });
+        this._item.icon.icon_name = 'screen-shared-symbolic';
+        this.menu.addMenuItem(this._item);
+    },
+
+    _sync() {
+        if (this._handles.size == 0) {
+            this._indicator.visible = false;
+            this._item.actor.visible = false;
+        } else {
+            this._indicator.visible = true;
+            this._item.actor.visible = true;
+        }
+    },
+
+    _onStopped(handle) {
+        this._handles.delete(handle);
+        this._sync();
+    },
+
+    _onNewHandle(handle) {
+        this._handles.add(handle);
+        handle.connect('stopped', this._onStopped.bind(this));
+
+        if (this._handles.size == 1) {
+            this._ensureControls();
+            this._sync();
+        }
+    },
+});

src/shell-util.c

@@ -399,9 +399,6 @@ get_gl_vendor (void)
 gboolean
 shell_util_need_background_refresh (void)
 {
-  if (!clutter_check_windowing_backend (CLUTTER_WINDOWING_X11))
-    return FALSE;
-
   if (g_strcmp0 (get_gl_vendor (), "NVIDIA Corporation") == 0)
     return TRUE;
 

src/st/st-texture-cache.c

@@ -105,6 +105,18 @@ st_texture_cache_class_init (StTextureCacheClass *klass)
                   G_TYPE_NONE, 1, G_TYPE_FILE);
 }
 
+/* Evicts all cached textures */
+void
+st_texture_cache_clear (StTextureCache *cache)
+{
+  GHashTableIter iter;
+  gpointer key;
+  gpointer value;
+
+  g_hash_table_remove_all (cache->priv->keyed_cache);
+  g_signal_emit (cache, signals[ICON_THEME_CHANGED], 0);
+}
+
 /* Evicts all cached textures for named icons */
 static void
 st_texture_cache_evict_icons (StTextureCache *cache)

src/st/st-texture-cache.h

@@ -52,6 +52,7 @@ typedef enum {
 } StTextureCachePolicy;
 
 StTextureCache* st_texture_cache_get_default (void);
+void st_texture_cache_clear (StTextureCache *cache);
 
 ClutterActor *
 st_texture_cache_load_sliced_image (StTextureCache *cache,