[gtk+/gtk-style-context: 17/251] GtkWidget: Add gtk_widget_get_style_context().

[Carlos Garnacho <carlosg src gnome org>]

commit 9a552fb975ea178095f80a8eb8b4eb6e6ddbd644
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 |   23 +++++++++++++++++++++++
 gtk/gtkwidget.h |    4 ++++
 2 files changed, 27 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 0acf8ea..977b60d 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -57,6 +57,7 @@
 #include "gtkbuildable.h"
 #include "gtkbuilderprivate.h"
 #include "gtksizerequest.h"
+#include "gtkstylecontext.h"
 #include "gtkdebug.h"
 
 
@@ -508,6 +509,7 @@ static GQuark		quark_tooltip_markup = 0;
 static GQuark		quark_has_tooltip = 0;
 static GQuark		quark_tooltip_window = 0;
 static GQuark		quark_visual = 0;
+static GQuark           quark_style_context = 0;
 GParamSpecPool         *_gtk_widget_child_property_pool = NULL;
 GObjectNotifyContext   *_gtk_widget_child_property_notify_context = NULL;
 
@@ -621,6 +623,7 @@ gtk_widget_class_init (GtkWidgetClass *klass)
   quark_has_tooltip = g_quark_from_static_string ("gtk-has-tooltip");
   quark_tooltip_window = g_quark_from_static_string ("gtk-tooltip-window");
   quark_visual = g_quark_from_static_string ("gtk-widget-visual");
+  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);
@@ -12511,3 +12514,23 @@ _gtk_widget_set_height_request_needed (GtkWidget *widget,
 {
   widget->priv->height_request_needed = height_request_needed;
 }
+
+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 9674a5f..c6f03e4 100644
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -36,6 +36,7 @@
 #include <gtk/gtkadjustment.h>
 #include <gtk/gtkstyle.h>
 #include <gtk/gtksettings.h>
+#include <gtk/gtkstylecontext.h>
 #include <atk/atk.h>
 
 G_BEGIN_DECLS
@@ -888,6 +889,9 @@ void         _gtk_widget_buildable_finish_accelerator (GtkWidget *widget,
 
 gboolean     gtk_widget_in_destruction (GtkWidget *widget);
 
+GtkStyleContext * gtk_widget_get_style_context (GtkWidget *widget);
+
+
 G_END_DECLS
 
 #endif /* __GTK_WIDGET_H__ */