background: fix a race condition when loading several animations

When loading several animations at the same time, the last call
overrides the result for all of them.

This commit caches all animations separately based on the source's
schemas.

https://bugzilla.gnome.org/show_bug.cgi?id=741453

diff --git a/js/ui/background.js b/js/ui/background.js
index a4634526c954eaed37a00d2b62caa37fcaa3dc49..e2f9a473b976f4daa55f24bbfa009f26ad26518a 100644 (file)
--- a/js/ui/background.js
+++ b/js/ui/background.js
@@ -144,6 +144,7 @@ const BackgroundCache = new Lang.Class({
         this._pendingFileLoads = [];
         this._fileMonitors = {};
         this._backgroundSources = {};
+        this._animations = {};
     },
 
     monitorFile: function(file) {
@@ -162,12 +163,13 @@ const BackgroundCache = new Lang.Class({
 
     getAnimation: function(params) {
         params = Params.parse(params, { file: null,
+                                        settingsSchema: null,
                                         onLoaded: null });
 
-        if (_fileEqual0(this._animationFile, params.file)) {
+        if (this._animations[params.settingsSchema] && _fileEqual0(this._animationFile, params.file)) {
             if (params.onLoaded) {
                 let id = GLib.idle_add(GLib.PRIORITY_DEFAULT, Lang.bind(this, function() {
-                    params.onLoaded(this._animation);
+                    params.onLoaded(this._animations[params.settingsSchema]);
                     return GLib.SOURCE_REMOVE;
                 }));
                 GLib.Source.set_name_by_id(id, '[gnome-shell] params.onLoaded');
@@ -178,12 +180,11 @@ const BackgroundCache = new Lang.Class({
         let animation = new Animation({ file: params.file });
 
         animation.load(Lang.bind(this, function() {
-                           this._animationFile = params.file;
-                           this._animation = animation;
+                           this._animations[params.settingsSchema] = animation;
 
                            if (params.onLoaded) {
                                let id = GLib.idle_add(GLib.PRIORITY_DEFAULT, Lang.bind(this, function() {
-                                   params.onLoaded(this._animation);
+                                   params.onLoaded(this._animations[params.settingsSchema]);
                                    return GLib.SOURCE_REMOVE;
                                }));
                                GLib.Source.set_name_by_id(id, '[gnome-shell] params.onLoaded');
@@ -403,6 +404,7 @@ const Background = new Lang.Class({
 
     _loadAnimation: function(file) {
         this._cache.getAnimation({ file: file,
+                                   settingsSchema: this._settings.schema_id,
                                    onLoaded: Lang.bind(this, function(animation) {
                                        this._animation = animation;