Introduce support for desktop actions in the dash

Using the new list_actions() API in Gio, add entries for static
actions specified in .desktop files in the right-click app menus,
in the dash, app well and search.

https://bugzilla.gnome.org/show_bug.cgi?id=669603

js/ui/appDisplay.js

@@ -1501,7 +1501,18 @@ const AppIconMenu = new Lang.Class({
                 this._source.app.open_new_window(-1);
                 this.emit('activate-window', null);
             }));
+            this._appendSeparator();
 
+            let appInfo = this._source.app.get_app_info();
+            let actions = appInfo.list_actions();
+            for (let i = 0; i < actions.length; i++) {
+                let action = actions[i];
+                let item = this._appendMenuItem(appInfo.get_action_name(action));
+                item.connect('activate', Lang.bind(this, function(emitter, event) {
+                    this._source.app.launch_action(action, event.get_time(), -1);
+                    this.emit('activate-window', null);
+                }));
+            }
             this._appendSeparator();
 
             let isFavorite = AppFavorites.getAppFavorites().isFavorite(this._source.app.get_id());

src/shell-app.c

@@ -1185,31 +1185,15 @@ app_child_setup (gpointer user_data)
 }
 #endif
 
-/**
- * shell_app_launch:
- * @timestamp: Event timestamp, or 0 for current event timestamp
- * @workspace: Start on this workspace, or -1 for default
- * @error: A #GError
- */
-gboolean
-shell_app_launch (ShellApp     *app,
-                  guint         timestamp,
-                  int           workspace,
-                  GError      **error)
+static GAppLaunchContext *
+make_launch_context (guint timestamp,
+                     int   workspace)
 {
   GdkAppLaunchContext *context;
-  gboolean ret;
   ShellGlobal *global;
   MetaScreen *screen;
   GdkDisplay *gdisplay;
 
-  if (app->info == NULL)
-    {
-      MetaWindow *window = window_backed_app_get_window (app);
-      meta_window_activate (window, timestamp);
-      return TRUE;
-    }
-
   global = shell_global_get ();
   screen = shell_global_get_screen (global);
   gdisplay = gdk_screen_get_display (shell_global_get_gdk_screen (global));
@@ -1224,8 +1208,35 @@ shell_app_launch (ShellApp     *app,
   gdk_app_launch_context_set_timestamp (context, timestamp);
   gdk_app_launch_context_set_desktop (context, workspace);
 
+  return G_APP_LAUNCH_CONTEXT (context);
+}
+
+/**
+ * shell_app_launch:
+ * @timestamp: Event timestamp, or 0 for current event timestamp
+ * @workspace: Start on this workspace, or -1 for default
+ * @error: A #GError
+ */
+gboolean
+shell_app_launch (ShellApp     *app,
+                  guint         timestamp,
+                  int           workspace,
+                  GError      **error)
+{
+  GAppLaunchContext *context;
+  gboolean ret;
+
+  if (app->info == NULL)
+    {
+      MetaWindow *window = window_backed_app_get_window (app);
+      meta_window_activate (window, timestamp);
+      return TRUE;
+    }
+
+  context = make_launch_context (timestamp, workspace),
+
   ret = g_desktop_app_info_launch_uris_as_manager (app->info, NULL,
-                                                   G_APP_LAUNCH_CONTEXT (context),
+                                                   context,
                                                    G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
 #ifdef HAVE_SYSTEMD
                                                    app_child_setup, (gpointer)shell_app_get_id (app),
@@ -1239,6 +1250,30 @@ shell_app_launch (ShellApp     *app,
   return ret;
 }
 
+/**
+ * shell_app_launch_action:
+ * @app: the #ShellApp
+ * @action_name: the name of the action to launch (as obtained by
+ *               g_desktop_app_info_list_actions())
+ * @timestamp: Event timestamp, or 0 for current event timestamp
+ * @workspace: Start on this workspace, or -1 for default
+ */
+void
+shell_app_launch_action (ShellApp        *app,
+                         const char      *action_name,
+                         guint            timestamp,
+                         int              workspace)
+{
+  GAppLaunchContext *context;
+
+  context = make_launch_context (timestamp, workspace);
+
+  g_desktop_app_info_launch_action (G_DESKTOP_APP_INFO (app->info),
+                                    action_name, context);
+
+  g_object_unref (context);
+}
+
 /**
  * shell_app_get_app_info:
  * @app: a #ShellApp

src/shell-app.h

@@ -74,6 +74,11 @@ gboolean shell_app_launch (ShellApp     *app,
                            int           workspace,
                            GError      **error);
 
+void shell_app_launch_action (ShellApp        *app,
+                              const char      *action_name,
+                              guint            timestamp,
+                              int              workspace);
+
 int shell_app_compare_by_name (ShellApp *app, ShellApp *other);
 
 int shell_app_compare (ShellApp *app, ShellApp *other);