[gedit/gnome-3-0] Fix slowdown when closing all tabs

[Ignacio Casal Quinteiro <icq src gnome org>]

commit e483ab955254245bc828010081cf1b3f9f858e29
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Jun 26 22:43:54 2011 +0200

    Fix slowdown when closing all tabs
    
    We were O^2 stupid: for each tab we were getting its position, which in
    turns requires walking the list of children and then we were removing
    the tab, which in turns requires gtk to re-walk the list of tabs to find
    the one we want to remove. Besides removing tabs starting from the first
    is bad for gtknotebook since even/odd css of each tab is recalculated
    over and over: we can remove tabs in reverse order.

 gedit/gedit-notebook.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/gedit/gedit-notebook.c b/gedit/gedit-notebook.c
index c61fa63..942a487 100644
--- a/gedit/gedit-notebook.c
+++ b/gedit/gedit-notebook.c
@@ -621,15 +621,23 @@ gedit_notebook_remove_tab (GeditNotebook *nb,
  */
 void
 gedit_notebook_remove_all_tabs (GeditNotebook *nb)
-{	
+{
+	GList *tabs, *t;
+
 	g_return_if_fail (GEDIT_IS_NOTEBOOK (nb));
 	
 	g_list_free (nb->priv->focused_pages);
 	nb->priv->focused_pages = NULL;
 
-	gtk_container_foreach (GTK_CONTAINER (nb),
-			       (GtkCallback)remove_tab,
-			       nb);
+	/* Remove tabs in reverse order since it is faster
+	 * due to how gtknotebook works */
+	tabs = gtk_container_get_children (GTK_CONTAINER (nb));
+	for (t = g_list_last (tabs); t != NULL; t = t->prev)
+	{
+		gtk_container_remove (GTK_CONTAINER (nb), GTK_WIDGET (t->data));
+	}
+
+	g_list_free (tabs);
 }
 
 static void