1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/ui/gtk/owned_widget_gtk.h" 6 7 #include <gtk/gtk.h> 8 9 #include "base/logging.h" 10 11 OwnedWidgetGtk::~OwnedWidgetGtk() { 12 Destroy(); 13 } 14 15 void OwnedWidgetGtk::Own(GtkWidget* widget) { 16 if (!widget) 17 return; 18 19 DCHECK(!widget_); 20 // We want to make sure that Own() was called properly, right after the 21 // widget was created. There should be a floating reference. 22 DCHECK(g_object_is_floating(widget)); 23 24 // Sink the floating reference, we should now own this reference. 25 g_object_ref_sink(widget); 26 widget_ = widget; 27 } 28 29 void OwnedWidgetGtk::Destroy() { 30 if (!widget_) 31 return; 32 33 GtkWidget* widget = widget_; 34 widget_ = NULL; 35 gtk_widget_destroy(widget); 36 37 DCHECK(!g_object_is_floating(widget)); 38 // NOTE: Assumes some implementation details about glib internals. 39 DCHECK_EQ(G_OBJECT(widget)->ref_count, 1U); 40 g_object_unref(widget); 41 } 42
