Add per-window actions

GTK+ also exports window-specific actions, by putting the object path
for the exported action group in the _DBUS_OBJECT_PATH X property.
We add this action group to the app's muxer with a 'win' prefix,
since that is what the exported menu expects. Whenever the focus
window changes, we update the window-specific actions of its
application, and emit notify::action-group to cause the app
menu to be updated.

js/ui/panel.js

@@ -244,6 +244,7 @@ const AppMenuButton = new Lang.Class({
         this._menuManager = menuManager;
         this._targetApp = null;
         this._appMenuNotifyId = 0;
+        this._actionGroupNotifyId = 0;
 
         let bin = new St.Bin({ name: 'appMenu' });
         this.actor.add_actor(bin);
@@ -522,8 +523,12 @@ const AppMenuButton = new Lang.Class({
 
         if (this._appMenuNotifyId)
             this._targetApp.disconnect(this._appMenuNotifyId);
-        if (targetApp)
+        if (this._actionGroupNotifyId)
+            this._targetApp.disconnect(this._actionGroupNotifyId);
+        if (targetApp) {
             this._appMenuNotifyId = targetApp.connect('notify::menu', Lang.bind(this, this._sync));
+            this._actionGroupNotifyId = targetApp.connect('notify::action-group', Lang.bind(this, this._sync));
+        }
 
         this._targetApp = targetApp;
         let icon = targetApp.get_faded_icon(2 * PANEL_ICON_SIZE);

src/shell-app.c

@@ -557,6 +557,31 @@ shell_app_activate_window (ShellApp     *app,
     }
 }
 
+
+void
+shell_app_update_window_actions (ShellApp *app, MetaWindow *window)
+{
+  const char *object_path;
+
+  object_path = meta_window_get_dbus_object_path (window);
+  if (object_path != NULL)
+    {
+      GActionGroup *actions;
+
+      actions = g_object_get_data (G_OBJECT (window), "actions");
+      if (actions == NULL)
+        {
+          actions = G_ACTION_GROUP (g_dbus_action_group_get (g_dbus_proxy_get_connection (app->running_state->app_proxy),
+                                                             meta_window_get_dbus_unique_name (window),
+                                                             object_path));
+          g_object_set_data_full (G_OBJECT (window), "actions", actions, g_object_unref);
+        }
+
+      g_action_muxer_insert (app->running_state->muxer, "win", actions);
+      g_object_notify (G_OBJECT (app), "action-group");
+    }
+}
+
 /**
  * shell_app_activate:
  * @app: a #ShellApp
@@ -1081,7 +1106,7 @@ on_dbus_proxy_gotten (GObject      *initable,
 
       g_variant_get_child (menu_property, 0, "&o", &object_path);
 
-      state->remote_menu = G_MENU_MODEL (g_dbus_menu_model_get (g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL),
+      state->remote_menu = G_MENU_MODEL (g_dbus_menu_model_get (g_dbus_proxy_get_connection (state->app_proxy),
                                                                 state->dbus_name,
                                                                 object_path));
 

src/shell-app.h

@@ -83,6 +83,8 @@ int shell_app_compare_by_name (ShellApp *app, ShellApp *other);
 
 int shell_app_compare (ShellApp *app, ShellApp *other);
 
+void shell_app_update_window_actions (ShellApp *app, MetaWindow *window);
+
 G_END_DECLS
 
 #endif /* __SHELL_APP_H__ */

src/shell-window-tracker.c

@@ -413,6 +413,9 @@ update_focus_app (ShellWindowTracker *self)
   new_focus_win = meta_display_get_focus_window (shell_global_get_display (shell_global_get ()));
   new_focus_app = new_focus_win ? shell_window_tracker_get_window_app (self, new_focus_win) : NULL;
 
+  if (new_focus_app)
+    shell_app_update_window_actions (new_focus_app, new_focus_win);
+
   set_focus_app (self, new_focus_app);
 }