app-system: Remove use of gnome-menus internally

We want to transition to a system in the future where we have a desktop
file cache. As we no longer differentiate categories or similar, it no
longer makes sense to have app visibility based on categories. Thus,
we no longer need to use gnome-menus to list all apps. The potential
issue here is reloading all desktop files when new files are created,
but this can be dealt with individually.

The "All Applications" view still uses gnome-menus.

https://bugzilla.gnome.org/show_bug.cgi?id=698486

1 files changed, 21 insertions, 155 deletions

diff --git a/src/shell-app-system.c b/src/shell-app-system.c
index af418225..7b38fe51 100644
--- a/src/shell-app-system.c
+++ b/src/shell-app-system.c
@@ -38,15 +38,12 @@ enum {
 static guint signals[LAST_SIGNAL] = { 0 };
 
 struct _ShellAppSystemPrivate {
-  GMenuTree *apps_tree;
-
   GHashTable *running_apps;
   GHashTable *id_to_app;
   GHashTable *startup_wm_class_to_id;
 };
 
 static void shell_app_system_finalize (GObject *object);
-static void on_apps_tree_changed_cb (GMenuTree *tree, gpointer user_data);
 
 G_DEFINE_TYPE(ShellAppSystem, shell_app_system, G_TYPE_OBJECT);
 
@@ -75,6 +72,26 @@ static void shell_app_system_class_init(ShellAppSystemClass *klass)
 }
 
 static void
+load_apps (ShellAppSystem *self)
+{
+  ShellAppSystemPrivate *priv = self->priv;
+  GList *apps, *l;
+
+  apps = g_app_info_get_all ();
+  for (l = apps; l != NULL; l = l->next)
+    {
+      GAppInfo *info = l->data;
+      g_hash_table_insert (priv->id_to_app,
+                           (char *) g_app_info_get_id (info),
+                           _shell_app_new (G_DESKTOP_APP_INFO (info)));
+    }
+
+  g_list_free_full (apps, g_object_unref);
+
+  g_signal_emit (self, signals[INSTALLED_CHANGED], 0);
+}
+
+static void
 shell_app_system_init (ShellAppSystem *self)
 {
   ShellAppSystemPrivate *priv;
@@ -90,12 +107,7 @@ shell_app_system_init (ShellAppSystem *self)
 
   priv->startup_wm_class_to_id = g_hash_table_new (g_str_hash, g_str_equal);
 
-  /* We want to track NoDisplay apps, so we add INCLUDE_NODISPLAY. We'll
-   * filter NoDisplay apps out when showing them to the user. */
-  priv->apps_tree = gmenu_tree_new ("applications.menu", GMENU_TREE_FLAGS_INCLUDE_NODISPLAY);
-  g_signal_connect (priv->apps_tree, "changed", G_CALLBACK (on_apps_tree_changed_cb), self);
-
-  on_apps_tree_changed_cb (priv->apps_tree, self);
+  load_apps (self);
 }
 
 static void
@@ -104,8 +116,6 @@ shell_app_system_finalize (GObject *object)
   ShellAppSystem *self = SHELL_APP_SYSTEM (object);
   ShellAppSystemPrivate *priv = self->priv;
 
-  g_object_unref (priv->apps_tree);
-
   g_hash_table_destroy (priv->running_apps);
   g_hash_table_destroy (priv->id_to_app);
   g_hash_table_destroy (priv->startup_wm_class_to_id);
@@ -113,150 +123,6 @@ shell_app_system_finalize (GObject *object)
   G_OBJECT_CLASS (shell_app_system_parent_class)->finalize (object);
 }
 
-static void
-get_flattened_entries_recurse (GMenuTreeDirectory *dir,
-                               GHashTable         *entry_set)
-{
-  GMenuTreeIter *iter = gmenu_tree_directory_iter (dir);
-  GMenuTreeItemType next_type;
-
-  while ((next_type = gmenu_tree_iter_next (iter)) != GMENU_TREE_ITEM_INVALID)
-    {
-      gpointer item = NULL;
-
-      switch (next_type)
-        {
-        case GMENU_TREE_ITEM_ENTRY:
-          {
-            GMenuTreeEntry *entry;
-            item = entry = gmenu_tree_iter_get_entry (iter);
-            /* Key is owned by entry */
-            g_hash_table_replace (entry_set,
-                                  (char*)gmenu_tree_entry_get_desktop_file_id (entry),
-                                  gmenu_tree_item_ref (entry));
-          }
-          break;
-        case GMENU_TREE_ITEM_DIRECTORY:
-          {
-            item = gmenu_tree_iter_get_directory (iter);
-            get_flattened_entries_recurse ((GMenuTreeDirectory*)item, entry_set);
-          }
-          break;
-        default:
-          break;
-        }
-      if (item != NULL)
-        gmenu_tree_item_unref (item);
-    }
-
-  gmenu_tree_iter_unref (iter);
-}
-
-static GHashTable *
-get_flattened_entries_from_tree (GMenuTree *tree)
-{
-  GHashTable *table;
-  GMenuTreeDirectory *root;
-
-  table = g_hash_table_new_full (g_str_hash, g_str_equal,
-                                 (GDestroyNotify) NULL,
-                                 (GDestroyNotify) gmenu_tree_item_unref);
-
-  root = gmenu_tree_get_root_directory (tree);
-  
-  if (root != NULL)
-    get_flattened_entries_recurse (root, table);
-
-  gmenu_tree_item_unref (root);
-  
-  return table;
-}
-
-static void
-on_apps_tree_changed_cb (GMenuTree *tree,
-                         gpointer   user_data)
-{
-  ShellAppSystem *self = SHELL_APP_SYSTEM (user_data);
-  GError *error = NULL;
-  GHashTable *new_apps;
-  GHashTableIter iter;
-  gpointer key, value;
-
-  g_assert (tree == self->priv->apps_tree);
-
-  if (!gmenu_tree_load_sync (self->priv->apps_tree, &error))
-    {
-      if (error)
-        {
-          g_warning ("Failed to load apps: %s", error->message);
-          g_error_free (error);
-        }
-      else
-        {
-          g_warning ("Failed to load apps");
-        }
-      return;
-    }
-
-  new_apps = get_flattened_entries_from_tree (self->priv->apps_tree);
-  g_hash_table_iter_init (&iter, new_apps);
-  while (g_hash_table_iter_next (&iter, &key, &value))
-    {
-      const char *id = key;
-      GMenuTreeEntry *entry = value;
-      ShellApp *app;
-      GDesktopAppInfo *info;
-      const char *startup_wm_class;
-
-      info = g_desktop_app_info_new (gmenu_tree_entry_get_desktop_file_id (entry));
-
-      app = g_hash_table_lookup (self->priv->id_to_app, id);
-      if (app != NULL)
-        {
-          GDesktopAppInfo *old_info;
-          const gchar *old_startup_wm_class;
-
-          old_info = shell_app_get_app_info (app);
-          old_startup_wm_class = g_desktop_app_info_get_startup_wm_class (old_info);
-
-          if (old_startup_wm_class)
-            g_hash_table_remove (self->priv->startup_wm_class_to_id, old_startup_wm_class);
-
-          _shell_app_set_app_info (app, info);
-          g_object_ref (app);  /* Extra ref, removed in _replace below */
-        }
-      else
-        {
-          app = _shell_app_new (info);
-        }
-
-      g_object_unref (info);
-
-      g_hash_table_replace (self->priv->id_to_app, (char*)id, app);
-
-      startup_wm_class = g_desktop_app_info_get_startup_wm_class (info);
-      if (startup_wm_class)
-        g_hash_table_replace (self->priv->startup_wm_class_to_id,
-                              (char*)startup_wm_class, (char*)id);
-    }
-  /* Now iterate over the apps again; we need to unreference any apps
-   * which have been removed.  The JS code may still be holding a
-   * reference; that's fine.
-   */
-  g_hash_table_iter_init (&iter, self->priv->id_to_app);
-  while (g_hash_table_iter_next (&iter, &key, &value))
-    {
-      const char *id = key;
-      
-      if (!g_hash_table_lookup (new_apps, id))
-        g_hash_table_iter_remove (&iter);
-    }
-
-  g_hash_table_destroy (new_apps);
-
-  g_signal_emit (self, signals[INSTALLED_CHANGED], 0);
-}
-
 /**
  * shell_app_system_get_default:
  *