From 524d3e4fc324c2cbc2454e8b1fcddc6622dc4714 Mon Sep 17 00:00:00 2001
From: yetist <xiaotian.wu@i-soft.com.cn>
Date: Wed, 2 May 2018 22:46:52 +0800
Subject: backport from gnome-menus

---
 libmenu/menu-layout.c | 50 +++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 43 insertions(+), 7 deletions(-)

(limited to 'libmenu/menu-layout.c')

diff --git a/libmenu/menu-layout.c b/libmenu/menu-layout.c
index 89e9752..30d11b3 100644
--- a/libmenu/menu-layout.c
+++ b/libmenu/menu-layout.c
@@ -64,7 +64,10 @@ struct MenuLayoutNodeRoot
   char *basedir;
   char *name;
 
+  GMainContext *main_context;
+
   GSList *monitors;
+  GSource *monitors_idle_handler;
 };
 
 struct MenuLayoutNodeMenu
@@ -133,16 +136,14 @@ node_next (MenuLayoutNode *node)
   return node->next;
 }
 
-static void
-handle_entry_directory_changed (EntryDirectory *dir,
-                                MenuLayoutNode *node)
+static gboolean
+menu_layout_invoke_monitors (MenuLayoutNodeRoot *nr)
 {
-  MenuLayoutNodeRoot *nr;
-  GSList             *tmp;
+  GSList *tmp;
 
-  g_assert (node->type == MENU_LAYOUT_NODE_MENU);
+  g_assert (nr->node.type == MENU_LAYOUT_NODE_ROOT);
 
-  nr = (MenuLayoutNodeRoot *) menu_layout_node_get_root (node);
+  nr->monitors_idle_handler = NULL;
 
   tmp = nr->monitors;
   while (tmp != NULL)
@@ -154,6 +155,28 @@ handle_entry_directory_changed (EntryDirectory *dir,
 
       tmp = next;
     }
+
+  return FALSE;
+}
+
+static void
+handle_entry_directory_changed (EntryDirectory *dir,
+                                MenuLayoutNode *node)
+{
+  MenuLayoutNodeRoot *nr;
+
+  g_assert (node->type == MENU_LAYOUT_NODE_MENU);
+
+  nr = (MenuLayoutNodeRoot *) menu_layout_node_get_root (node);
+
+  if (nr->monitors_idle_handler == NULL)
+    {
+      nr->monitors_idle_handler = g_idle_source_new ();
+      g_source_set_callback (nr->monitors_idle_handler,
+                             (GSourceFunc) menu_layout_invoke_monitors, nr, NULL);
+      g_source_attach (nr->monitors_idle_handler, nr->main_context);
+      g_source_unref (nr->monitors_idle_handler);
+    }
 }
 
 static void
@@ -224,6 +247,14 @@ menu_layout_node_unref (MenuLayoutNode *node)
           g_slist_foreach (nr->monitors, (GFunc) g_free, NULL);
           g_slist_free (nr->monitors);
 
+          if (nr->monitors_idle_handler != NULL)
+            g_source_destroy (nr->monitors_idle_handler);
+          nr->monitors_idle_handler = NULL;
+
+          if (nr->main_context != NULL)
+            g_main_context_unref (nr->main_context);
+          nr->main_context = NULL;
+
           g_free (nr->basedir);
           g_free (nr->name);
         }
@@ -2266,6 +2297,7 @@ menu_layout_load (const char  *filename,
                   const char  *non_prefixed_basename,
                   GError     **err)
 {
+  GMainContext        *main_context;
   GMarkupParseContext *context;
   MenuLayoutNodeRoot  *root;
   MenuLayoutNode      *retval;
@@ -2281,6 +2313,8 @@ menu_layout_load (const char  *filename,
   retval = NULL;
   context = NULL;
 
+  main_context = g_main_context_get_thread_default ();
+
   menu_verbose ("Loading \"%s\" from disk\n", filename);
 
   if (!g_file_get_contents (filename,
@@ -2328,6 +2362,8 @@ menu_layout_load (const char  *filename,
   error = NULL;
   g_markup_parse_context_end_parse (context, &error);
 
+  root->main_context = main_context ? g_main_context_ref (main_context) : NULL;
+
  out:
   if (context)
     g_markup_parse_context_free (context);
-- 
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