places-sidebar: Use asynchronous API for querying bookmarks

Removes two FIXMEs, and ensures that the places sidebar does not block
while enumerating bookmarks or application shortcuts to remote volumes.

https://bugzilla.gnome.org/show_bug.cgi?id=735953

gtk/gtkplacessidebar.c

@@ -743,46 +743,41 @@ file_is_shown (GtkPlacesSidebar *sidebar,
 }
 
 static void
-add_application_shortcuts (GtkPlacesSidebar *sidebar)
+on_app_shortcuts_query_complete (GObject      *source,
+                                 GAsyncResult *result,
+                                 gpointer      data)
 {
-  GSList *l;
+  GtkPlacesSidebar *sidebar = data;
-
+  GFile *file = G_FILE (source);
-  for (l = sidebar->shortcuts; l; l = l->next)
-    {
-      GFile *file;
   GFileInfo *info;
 
-      file = G_FILE (l->data);
+  info = g_file_query_info_finish (file, result, NULL);
 
-      if (!should_show_file (sidebar, file))
+  if (info == NULL)
-        continue;
-
-      if (file_is_shown (sidebar, file))
-        continue;
-
-      /* FIXME: we are getting file info synchronously.  We may want to do it async at some point. */
-      info = g_file_query_info (file,
-                                "standard::display-name,standard::symbolic-icon",
-                                G_FILE_QUERY_INFO_NONE,
-                                NULL,
-                                NULL); /* NULL-GError */
-
-      if (info)
     {
       gchar *uri;
       gchar *tooltip;
       const gchar *name;
       GIcon *icon;
+      int pos = 0;
 
       name = g_file_info_get_display_name (info);
       icon = g_file_info_get_symbolic_icon (info);
       uri = g_file_get_uri (file);
       tooltip = g_file_get_parse_name (file);
 
+      /* XXX: we could avoid this by using an ancillary closure
+       * with the index coming from add_application_shortcuts(),
+       * but in terms of algorithmic overhead, the application
+       * shortcuts is not going to be really big
+       */
+      pos = g_slist_index (sidebar->shortcuts, file);
+
       add_place (sidebar, PLACES_BUILT_IN,
                  SECTION_COMPUTER,
                  name, icon, uri,
-                     NULL, NULL, NULL, 0,
+                 NULL, NULL, NULL,
+                 pos,
                  tooltip);
 
       g_free (uri);
@@ -791,6 +786,30 @@ add_application_shortcuts (GtkPlacesSidebar *sidebar)
       g_object_unref (info);
     }
 }
+
+static void
+add_application_shortcuts (GtkPlacesSidebar *sidebar)
+{
+  GSList *l;
+
+  for (l = sidebar->shortcuts; l; l = l->next)
+    {
+      GFile *file = l->data;
+
+      if (!should_show_file (sidebar, file))
+        continue;
+
+      if (file_is_shown (sidebar, file))
+        continue;
+
+      g_file_query_info_async (file,
+                               "standard::display-name,standard::symbolic-icon",
+                               G_FILE_QUERY_INFO_NONE,
+                               G_PRIORITY_DEFAULT,
+                               NULL,
+                               on_app_shortcuts_query_complete,
+                               sidebar);
+    }
 }
 
 static gboolean
@@ -804,6 +823,65 @@ get_selected_iter (GtkPlacesSidebar *sidebar,
   return gtk_tree_selection_get_selected (selection, NULL, iter);
 }
 
+typedef struct {
+  GtkPlacesSidebar *sidebar;
+  int index;
+  gboolean is_native;
+} BookmarkQueryClosure;
+
+static void
+on_bookmark_query_info_complete (GObject *source,
+                                 GAsyncResult *result,
+                                 gpointer      data)
+{
+  BookmarkQueryClosure *clos = data;
+  GtkPlacesSidebar *sidebar = clos->sidebar;
+  GFile *root = G_FILE (source);
+  GFileInfo *info;
+  gchar *bookmark_name;
+  gchar *mount_uri;
+  gchar *tooltip;
+  GIcon *icon;
+
+  info = g_file_query_info_finish (root, result, NULL);
+
+  bookmark_name = _gtk_bookmarks_manager_get_bookmark_label (sidebar->bookmarks_manager, root);
+  if (bookmark_name == NULL && info != NULL)
+    bookmark_name = g_strdup (g_file_info_get_display_name (info));
+  else if (bookmark_name == NULL)
+    {
+      /* Don't add non-UTF-8 bookmarks */
+      bookmark_name = g_file_get_basename (root);
+      if (!g_utf8_validate (bookmark_name, -1, NULL))
+        {
+          g_free (bookmark_name);
+          goto out;
+        }
+    }
+
+  if (info)
+    icon = g_object_ref (g_file_info_get_symbolic_icon (info));
+  else
+    icon = g_themed_icon_new_with_default_fallbacks (clos->is_native ? ICON_NAME_FOLDER : ICON_NAME_FOLDER_NETWORK);
+
+  mount_uri = g_file_get_uri (root);
+  tooltip = g_file_get_parse_name (root);
+
+  add_place (sidebar, PLACES_BOOKMARK,
+             SECTION_BOOKMARKS,
+             bookmark_name, icon, mount_uri,
+             NULL, NULL, NULL, clos->index,
+             tooltip);
+
+  g_free (mount_uri);
+  g_free (tooltip);
+  g_free (bookmark_name);
+
+out:
+  g_clear_object (&info);
+  g_slice_free (BookmarkQueryClosure, clos);
+}
+
 static void
 update_places (GtkPlacesSidebar *sidebar)
 {
@@ -819,7 +897,6 @@ update_places (GtkPlacesSidebar *sidebar)
   gint index;
   gchar *original_uri, *mount_uri, *name, *identifier;
   gchar *home_uri;
-  gchar *bookmark_name;
   GIcon *icon;
   GFile *root;
   gchar *tooltip;
@@ -1131,8 +1208,8 @@ update_places (GtkPlacesSidebar *sidebar)
 
   for (sl = bookmarks, index = 0; sl; sl = sl->next, index++)
     {
-      GFileInfo *info;
       gboolean is_native;
+      BookmarkQueryClosure *clos;
 
       root = sl->data;
       is_native = g_file_is_native (root);
@@ -1149,47 +1226,17 @@ update_places (GtkPlacesSidebar *sidebar)
       if (sidebar->local_only && !is_native)
         continue;
 
-      /* FIXME: we are getting file info synchronously.  We may want to do it async at some point. */
+      clos = g_slice_new (BookmarkQueryClosure);
-      info = g_file_query_info (root,
+      clos->sidebar = sidebar;
+      clos->index = index;
+      clos->is_native = is_native;
+      g_file_query_info_async (root,
                                "standard::display-name,standard::symbolic-icon",
                                G_FILE_QUERY_INFO_NONE,
+                               G_PRIORITY_DEFAULT,
                                NULL,
-                                NULL); /* NULL-GError */
+                               on_bookmark_query_info_complete,
-
+                               clos);
-      bookmark_name = _gtk_bookmarks_manager_get_bookmark_label (sidebar->bookmarks_manager, root);
-      if (bookmark_name == NULL && info != NULL)
-        bookmark_name = g_strdup (g_file_info_get_display_name (info));
-      else if (bookmark_name == NULL)
-        {
-          /* Don't add non-UTF-8 bookmarks */
-          bookmark_name = g_file_get_basename (root);
-          if (!g_utf8_validate (bookmark_name, -1, NULL))
-            {
-              g_free (bookmark_name);
-              continue;
-            }
-        }
-
-      if (info)
-        icon = g_object_ref (g_file_info_get_symbolic_icon (info));
-      else
-        icon = g_themed_icon_new_with_default_fallbacks (is_native ? ICON_NAME_FOLDER : ICON_NAME_FOLDER_NETWORK);
-
-      mount_uri = g_file_get_uri (root);
-      tooltip = g_file_get_parse_name (root);
-
-      add_place (sidebar, PLACES_BOOKMARK,
-                 SECTION_BOOKMARKS,
-                 bookmark_name, icon, mount_uri,
-                 NULL, NULL, NULL, index,
-                 tooltip);
-
-      g_free (mount_uri);
-      g_free (tooltip);
-      g_free (bookmark_name);
-
-      if (info)
-        g_object_unref (info);
     }
 
   g_slist_foreach (bookmarks, (GFunc) g_object_unref, NULL);