st-theme-context: Make icon theme changes a bit more efficient

There's no need to destroy and recreate the root node for an icon theme
change. Just emit the CHANGED signal.

https://bugzilla.gnome.org/show_bug.cgi?id=673512

diff --git a/src/st/st-theme-context.c b/src/st/st-theme-context.c
index 6fe5fb72f248ca196b00005016f22ef57a6e68dd..0e96cdba5224b469af9155c9623e1ea398811103 100644 (file)
--- a/src/st/st-theme-context.c
+++ b/src/st/st-theme-context.c
@@ -129,13 +129,19 @@ on_stage_destroy (ClutterStage *stage)
   g_object_unref (context);
 }
 
+static void
+emit_changed (StThemeContext *context)
+{
+  g_signal_emit (context, signals[CHANGED], 0);
+}
+
 static void
 st_theme_context_changed (StThemeContext *context)
 {
   StThemeNode *old_root = context->root_node;
   context->root_node = NULL;
 
-  g_signal_emit (context, signals[CHANGED], 0);
+  emit_changed (context);
 
   if (old_root)
     g_object_unref (old_root);
@@ -148,8 +154,9 @@ on_icon_theme_changed (StTextureCache *cache,
   /* Note that an icon theme change isn't really a change of the StThemeContext;
    * the style information has changed. But since the style factors into the
    * icon_name => icon lookup, faking a theme context change is a good way
-   * to force users such as StIcon to look up icons again */
-  st_theme_context_changed (context);
+   * to force users such as StIcon to look up icons again. Don't bother recreating
+   * the root node, though. */
+  emit_changed (context);
 }
 
 /**