[gtk+/gtk-style-context: 17/206] GtkWidget: Add gtk_widget_get_style_context().

[Carlos Garnacho <carlosg src gnome org>]

commit d5104e087f10944e9945632e9d4d6703180765c3
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Mar 10 00:55:48 2010 +0100

    GtkWidget: Add gtk_widget_get_style_context().
    
    There will be one GtkStyleContext per widget, at the moment its
    lifetime is tied to the widget's, but it could be narrowed down
    to GTK_WIDGET_REALIZED.

 gtk/gtkwidget.c |   24 +++++++++++++++++++++++-
 gtk/gtkwidget.h |    4 ++++
 2 files changed, 27 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 98f1723..b056a29 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -56,7 +56,7 @@
 #include "gtkbuildable.h"
 #include "gtkbuilderprivate.h"
 #include "gtksizerequest.h"
-
+#include "gtkstylecontext.h"
 
 /**
  * SECTION:gtkwidget
@@ -393,6 +393,7 @@ static GQuark		quark_mnemonic_labels = 0;
 static GQuark		quark_tooltip_markup = 0;
 static GQuark		quark_has_tooltip = 0;
 static GQuark		quark_tooltip_window = 0;
+static GQuark           quark_style_context = 0;
 GParamSpecPool         *_gtk_widget_child_property_pool = NULL;
 GObjectNotifyContext   *_gtk_widget_child_property_notify_context = NULL;
 
@@ -490,6 +491,7 @@ gtk_widget_class_init (GtkWidgetClass *klass)
   quark_tooltip_markup = g_quark_from_static_string ("gtk-tooltip-markup");
   quark_has_tooltip = g_quark_from_static_string ("gtk-has-tooltip");
   quark_tooltip_window = g_quark_from_static_string ("gtk-tooltip-window");
+  quark_style_context = g_quark_from_static_string ("gtk-style-context");
 
   style_property_spec_pool = g_param_spec_pool_new (FALSE);
   _gtk_widget_child_property_pool = g_param_spec_pool_new (TRUE);
@@ -11552,3 +11554,23 @@ gtk_widget_send_focus_change (GtkWidget *widget,
 
   return res;
 }
+
+GtkStyleContext *
+gtk_widget_get_style_context (GtkWidget *widget)
+{
+  GtkStyleContext *context;
+
+  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
+
+  context = g_object_get_qdata (G_OBJECT (widget),
+                                quark_style_context);
+
+  if (G_UNLIKELY (!context))
+    {
+      context = g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
+      g_object_set_qdata_full (widget, quark_style_context, context,
+                               (GDestroyNotify) g_object_unref);
+    }
+
+  return context;
+}
diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index 0bae2c6..1ca5ab5 100644
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -37,6 +37,7 @@
 #include <gtk/gtkadjustment.h>
 #include <gtk/gtkstyle.h>
 #include <gtk/gtksettings.h>
+#include <gtk/gtkstylecontext.h>
 #include <atk/atk.h>
 
 G_BEGIN_DECLS
@@ -994,6 +995,9 @@ void         _gtk_widget_buildable_finish_accelerator (GtkWidget *widget,
 						       GtkWidget *toplevel,
 						       gpointer   user_data);
 
+GtkStyleContext * gtk_widget_get_style_context (GtkWidget *widget);
+
+
 G_END_DECLS
 
 #endif /* __GTK_WIDGET_H__ */