[gnome-shell-extensions] window-list: Sort buttons by stable sequence

[Florian Müllner <fmuellner src gnome org>]

commit d8eb2273c099f1da40f4df67b0feae464ebc331f
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Apr 8 19:39:38 2014 +0200

    window-list: Sort buttons by stable sequence
    
    Currently the initial set of buttons is in stack/MRU order. To
    avoid shuffling around the list each time it is disabled/re-enabled
    (lock screen) or the group-mode settings changes, sort it by the
    stable sequence.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=719933

 extensions/window-list/extension.js |   18 ++++++++++++++++--
 1 files changed, 16 insertions(+), 2 deletions(-)
---
diff --git a/extensions/window-list/extension.js b/extensions/window-list/extension.js
index 32f15af..9a1c08d 100644
--- a/extensions/window-list/extension.js
+++ b/extensions/window-list/extension.js
@@ -57,6 +57,12 @@ function _onMenuStateChanged(menu, isOpen) {
         actor.sync_hover();
 }
 
+function _getAppStableSequence(app) {
+    return app.get_windows().reduce(function(prev, cur) {
+        return Math.min(prev, cur.get_stable_sequence());
+    }, 0);
+}
+
 
 const WindowContextMenu = new Lang.Class({
     Name: 'WindowContextMenu',
@@ -892,11 +898,19 @@ const WindowList = new Lang.Class({
         this._windowList.destroy_all_children();
 
         if (!this._grouped) {
-            let windows = Meta.get_window_actors(global.screen);
+            let windows = Meta.get_window_actors(global.screen).sort(
+                function(w1, w2) {
+                    return w1.metaWindow.get_stable_sequence() -
+                           w2.metaWindow.get_stable_sequence();
+                });
             for (let i = 0; i < windows.length; i++)
                 this._onWindowAdded(null, windows[i].metaWindow);
         } else {
-            let apps = this._appSystem.get_running();
+            let apps = this._appSystem.get_running().sort(
+                function(a1, a2) {
+                    return _getAppStableSequence(a1) -
+                           _getAppStableSequence(a2);
+                });
             for (let i = 0; i < apps.length; i++)
                 this._addApp(apps[i]);
         }