[gtk+] stylecontext: Add _gtk_style_context_peek_property()

[Benjamin Otte <otte src gnome org>]

commit 2c8ef919ae79bdb676b0250911534d5896e77009
Author: Benjamin Otte <otte redhat com>
Date:   Tue Jan 3 02:35:05 2012 +0100

    stylecontext: Add _gtk_style_context_peek_property()
    
    This allows peeking at the computed value for a property. This is useful
    for looking at GtkCssImage.

 gtk/gtkstylecontext.c        |   21 +++++++++++++++++++++
 gtk/gtkstylecontextprivate.h |    2 ++
 2 files changed, 23 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkstylecontext.c b/gtk/gtkstylecontext.c
index 6588207..be0fb8a 100644
--- a/gtk/gtkstylecontext.c
+++ b/gtk/gtkstylecontext.c
@@ -2298,6 +2298,27 @@ style_property_values_cmp (gconstpointer bsearch_node1,
 }
 
 const GValue *
+_gtk_style_context_peek_property (GtkStyleContext *context,
+                                  const char      *property_name)
+{
+  GtkStyleProperty *property;
+  StyleData *data;
+
+  property = _gtk_style_property_lookup (property_name);
+  if (!GTK_IS_CSS_STYLE_PROPERTY (property))
+    {
+      g_warning ("Style property \"%s\" does not exist", property_name);
+      return NULL;
+    }
+
+  data = style_data_lookup (context, gtk_style_context_get_state (context));
+
+  return _gtk_style_properties_peek_property (data->store,
+                                              GTK_CSS_STYLE_PROPERTY (property),
+                                              0);
+}
+
+const GValue *
 _gtk_style_context_peek_style_property (GtkStyleContext *context,
                                         GType            widget_type,
                                         GtkStateFlags    state,
diff --git a/gtk/gtkstylecontextprivate.h b/gtk/gtkstylecontextprivate.h
index 981eda7..ffde8db 100644
--- a/gtk/gtkstylecontextprivate.h
+++ b/gtk/gtkstylecontextprivate.h
@@ -25,6 +25,8 @@
 
 G_BEGIN_DECLS
 
+const GValue * _gtk_style_context_peek_property              (GtkStyleContext *context,
+                                                              const char      *property_name);
 const GValue * _gtk_style_context_peek_style_property        (GtkStyleContext *context,
                                                               GType            widget_type,
                                                               GtkStateFlags    state,