[gtk+] GtkMenuItem: only set 'separator' class on the separator line

[Lars Uebernickel <larsu src gnome org>]

commit d736e8baf9cbda017f738b5c5dcbf71f0713b4bc
Author: Lars Uebernickel <lars uebernickel canonical com>
Date:   Wed Dec 4 19:45:30 2013 +0100

    GtkMenuItem: only set 'separator' class on the separator line
    
    To make the separator line distinguishable from the widget's normal
    border from css.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=719861

 gtk/gtkmenuitem.c          |   10 ++++++++++
 gtk/gtkseparatormenuitem.c |    4 ----
 2 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkmenuitem.c b/gtk/gtkmenuitem.c
index e6430db..61843f7 100644
--- a/gtk/gtkmenuitem.c
+++ b/gtk/gtkmenuitem.c
@@ -987,6 +987,9 @@ gtk_menu_item_real_get_height (GtkWidget *widget,
       gboolean wide_separators;
       gint     separator_height;
 
+      gtk_style_context_save (context);
+      gtk_style_context_add_class (context, GTK_STYLE_CLASS_SEPARATOR);
+
       gtk_widget_style_get (widget,
                             "wide-separators",  &wide_separators,
                             "separator-height", &separator_height,
@@ -1007,6 +1010,8 @@ gtk_menu_item_real_get_height (GtkWidget *widget,
           if (nat_height % 2 == 0)
             nat_height += 1;
         }
+
+      gtk_style_context_restore (context);
     }
 
   accel_width = 0;
@@ -1696,6 +1701,9 @@ gtk_menu_item_draw (GtkWidget *widget,
       gboolean wide_separators;
       gint     separator_height;
 
+      gtk_style_context_save (context);
+      gtk_style_context_add_class (context, GTK_STYLE_CLASS_SEPARATOR);
+
       gtk_widget_style_get (widget,
                             "wide-separators",    &wide_separators,
                             "separator-height",   &separator_height,
@@ -1712,6 +1720,8 @@ gtk_menu_item_draw (GtkWidget *widget,
                          y + padding.top,
                          x + w - padding.right - 1,
                          y + padding.top);
+
+      gtk_style_context_restore (context);
     }
 
   GTK_WIDGET_CLASS (gtk_menu_item_parent_class)->draw (widget, cr);
diff --git a/gtk/gtkseparatormenuitem.c b/gtk/gtkseparatormenuitem.c
index da72129..938ca21 100644
--- a/gtk/gtkseparatormenuitem.c
+++ b/gtk/gtkseparatormenuitem.c
@@ -51,10 +51,6 @@ gtk_separator_menu_item_class_init (GtkSeparatorMenuItemClass *class)
 static void 
 gtk_separator_menu_item_init (GtkSeparatorMenuItem *item)
 {
-  GtkStyleContext *context;
-
-  context = gtk_widget_get_style_context (GTK_WIDGET (item));
-  gtk_style_context_add_class (context, GTK_STYLE_CLASS_SEPARATOR);
 }
 
 /**