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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_TAB_FIRST_RENDER_WATCHER_H_
#define CHROME_BROWSER_TAB_FIRST_RENDER_WATCHER_H_
#pragma once
#include "base/compiler_specific.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class RenderViewHost;
class TabContents;
// This class watches given TabContent's loading and rendering state change.
class TabFirstRenderWatcher : public content::NotificationObserver {
public:
class Delegate {
public:
virtual void OnRenderHostCreated(RenderViewHost* host) = 0;
virtual void OnTabMainFrameLoaded() = 0;
virtual void OnTabMainFrameFirstRender() = 0;
};
TabFirstRenderWatcher(TabContents* tab, Delegate* delegate);
private:
// Overridden from content::NotificationObserver
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
enum State {
NONE,
LOADED, // Renderer loaded the page.
FIRST_PAINT, // 1st paint event after the page is loaded.
};
State state_;
// TabContents that this class watches.
TabContents* tab_contents_;
// Delegate to notify.
Delegate* delegate_;
content::NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(TabFirstRenderWatcher);
};
#endif // CHROME_BROWSER_TAB_FIRST_RENDER_WATCHER_H_
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