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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_SAD_TAB_OBSERVER_H_
#define CHROME_BROWSER_UI_SAD_TAB_OBSERVER_H_
#pragma once
#include "base/memory/scoped_ptr.h"
#include "content/browser/tab_contents/tab_contents_observer.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "ui/gfx/native_widget_types.h"
#if defined(OS_MACOSX)
#include "base/mac/foundation_util.h"
#endif
#if defined(OS_MACOSX)
class SadTabController;
#elif defined(TOOLKIT_VIEWS)
namespace views {
class Widget;
}
#elif defined(TOOLKIT_GTK)
class SadTabGtk;
#endif
// Per-tab class to manage sad tab views.
class SadTabObserver : public TabContentsObserver,
public content::NotificationObserver {
public:
explicit SadTabObserver(TabContents* tab_contents);
virtual ~SadTabObserver();
private:
// Platform specific function to get an instance of the sad tab page.
gfx::NativeView AcquireSadTab(base::TerminationStatus status);
// Platform specific function to release the instance of the sad tab page.
void ReleaseSadTab();
// Platform specific function to determine if there is a current sad tab page.
bool HasSadTab();
// Overridden from TabContentsObserver:
virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
// Overridden from content::NotificationObserver:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Used to get notifications about renderers coming and going.
content::NotificationRegistrar registrar_;
// The platform views used to render the sad tab, non-NULL if visible.
#if defined(OS_MACOSX)
class ScopedPtrRelease {
public:
inline void operator()(void* x) const {
base::mac::NSObjectRelease(x);
}
};
scoped_ptr_malloc<SadTabController, ScopedPtrRelease> sad_tab_;
#elif defined(TOOLKIT_VIEWS)
scoped_ptr<views::Widget> sad_tab_;
#elif defined(TOOLKIT_GTK)
scoped_ptr<SadTabGtk> sad_tab_;
#endif
DISALLOW_COPY_AND_ASSIGN(SadTabObserver);
};
#endif // CHROME_BROWSER_UI_SAD_TAB_OBSERVER_H_
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