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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_ALTERNATE_ERROR_TAB_OBSERVER_H_
#define CHROME_BROWSER_UI_ALTERNATE_ERROR_TAB_OBSERVER_H_
#pragma once
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "content/browser/tab_contents/tab_contents_observer.h"
#include "content/public/browser/notification_registrar.h"
class TabContentsWrapper;
// Per-tab class to implement alternate error page functionality.
class AlternateErrorPageTabObserver : public TabContentsObserver,
public content::NotificationObserver {
public:
explicit AlternateErrorPageTabObserver(TabContentsWrapper* wrapper);
virtual ~AlternateErrorPageTabObserver();
static void RegisterUserPrefs(PrefService* prefs);
private:
// TabContentsObserver overrides:
virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
// content::NotificationObserver overrides:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Internal helpers ----------------------------------------------------------
// Returns the server that can provide alternate error pages. If the returned
// URL is empty, the default error page built into WebKit will be used.
GURL GetAlternateErrorPageURL() const;
// Send the alternate error page URL to the renderer.
void UpdateAlternateErrorPageURL(RenderViewHost* rvh);
// Our owning TabContentsWrapper.
TabContentsWrapper* wrapper_;
content::NotificationRegistrar registrar_;
PrefChangeRegistrar pref_change_registrar_;
DISALLOW_COPY_AND_ASSIGN(AlternateErrorPageTabObserver);
};
#endif // CHROME_BROWSER_UI_ALTERNATE_ERROR_TAB_OBSERVER_H_
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