[gtk+] stylecontext: Handle theme changes for cached styles

[Benjamin Otte <otte src gnome org>]

commit 29984c5282d1b47345b5b6627f796aa6cb34c752
Author: Benjamin Otte <otte redhat com>
Date:   Wed Jan 7 18:06:59 2015 +0100

    stylecontext: Handle theme changes for cached styles
    
    We need to clear the cache manually on full revalidates because
    _gtk_css_change_for_child() will clear the full revalidation flags.
    And then gtk_style_context_update_cache() will not do the right thing
    (which is to clear itself).

 gtk/gtkstylecontext.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkstylecontext.c b/gtk/gtkstylecontext.c
index eeb3022..4e91e84 100644
--- a/gtk/gtkstylecontext.c
+++ b/gtk/gtkstylecontext.c
@@ -2842,7 +2842,7 @@ gtk_style_context_update_cache (GtkStyleContext  *context,
   GtkCssStyle *parent;
   gpointer key, value;
 
-  if (_gtk_bitmask_is_empty (parent_changes))
+  if (change == 0 && _gtk_bitmask_is_empty (parent_changes))
     return;
 
   priv = context->priv;
@@ -2951,6 +2951,8 @@ _gtk_style_context_validate (GtkStyleContext  *context,
 
       g_object_unref (static_style);
       g_object_unref (style);
+  
+      gtk_style_context_clear_cache (context);
     }
   else
     {