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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chrome/common/owned_widget_gtk.h" | 5 #include "chrome/common/owned_widget_gtk.h" |
| 6 | 6 |
| 7 #include <gtk/gtk.h> | 7 #include <gtk/gtk.h> |
| 8 | 8 |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 | 10 |
| 11 OwnedWidgetGtk::~OwnedWidgetGtk() { | 11 OwnedWidgetGtk::~OwnedWidgetGtk() { |
| 12 DCHECK(!widget_) << "You must explicitly call OwnerWidgetGtk::Destroy()."; | 12 DCHECK(!widget_) << "You must explicitly call OwnerWidgetGtk::Destroy()."; |
| 13 } | 13 } |
| 14 | 14 |
| 15 void OwnedWidgetGtk::Own(GtkWidget* widget) { | 15 void OwnedWidgetGtk::Own(GtkWidget* widget) { |
| 16 if (!widget_) | 16 if (!widget) |
| 17 return; | 17 return; |
| 18 | 18 |
| 19 DCHECK(!widget_); | 19 DCHECK(!widget_); |
| 20 // We want to make sure that Own() was called properly, right after the | 20 // We want to make sure that Own() was called properly, right after the |
| 21 // widget was created. There should be a floating reference. | 21 // widget was created. There should be a floating reference. |
| 22 DCHECK(g_object_is_floating(widget)); | 22 DCHECK(g_object_is_floating(widget)); |
| 23 | 23 |
| 24 // Sink the floating reference, we should now own this reference. | 24 // Sink the floating reference, we should now own this reference. |
| 25 g_object_ref_sink(widget); | 25 g_object_ref_sink(widget); |
| 26 widget_ = widget; | 26 widget_ = widget; |
| 27 } | 27 } |
| 28 | 28 |
| 29 void OwnedWidgetGtk::Destroy() { | 29 void OwnedWidgetGtk::Destroy() { |
| 30 if (!widget_) | 30 if (!widget_) |
| 31 return; | 31 return; |
| 32 | 32 |
| 33 GtkWidget* widget = widget_; | 33 GtkWidget* widget = widget_; |
| 34 widget_ = NULL; | 34 widget_ = NULL; |
| 35 gtk_widget_destroy(widget); | 35 gtk_widget_destroy(widget); |
| 36 | 36 |
| 37 DCHECK(!g_object_is_floating(widget)); | 37 DCHECK(!g_object_is_floating(widget)); |
| 38 // NOTE: Assumes some implementation details about glib internals. | 38 // NOTE: Assumes some implementation details about glib internals. |
| 39 DCHECK_EQ(G_OBJECT(widget)->ref_count, 1U); | 39 DCHECK_EQ(G_OBJECT(widget)->ref_count, 1U); |
| 40 g_object_unref(widget); | 40 g_object_unref(widget); |
| 41 } | 41 } |
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