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// Copyright (c) 2010 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_CHROMEOS_OFFLINE_OFFLINE_LOAD_SERVICE_H_
#define CHROME_BROWSER_CHROMEOS_OFFLINE_OFFLINE_LOAD_SERVICE_H_
#pragma once
#include <tr1/unordered_set>
#include "base/ref_counted.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
#include "chrome/common/notification_type.h"
class GURL;
class NavigationController;
class TabContents;
template<class A> class scoped_ptr;
namespace chromeos {
// OfflineLoadService decides whether or not the given url in the tab
// should be loaded when the network is not available. The current
// implementation simply memorize the tab that loads offline page.
// TODO(oshima): Improve the logic so that we can automatically load
// if there is valid cache content and/or it supports offline mode.
class OfflineLoadService
: public NotificationObserver,
public base::RefCountedThreadSafe<OfflineLoadService> {
public:
// Returns the singleton instance of the offline load service.
static OfflineLoadService* Get();
// Returns true if the tab should proceed with loading the page even if
// it's offline.
bool ShouldProceed(int process_id, int render_view_id,
const GURL& url) const;
// Record that the user pressed "procced" button for
// the tab_contents.
void Proceeded(int proceed_id, int render_view_id, const GURL& url);
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
friend class base::RefCountedThreadSafe<OfflineLoadService>;
friend class scoped_ptr<OfflineLoadService>;
friend class OfflineLoadServiceSingleton;
OfflineLoadService() {}
virtual ~OfflineLoadService() {}
// A method invoked in UI thread to remove |tab_contents| from |tabs_|.
void RemoveTabContents(TabContents* tab_contents);
// A method invoked in UI thread to register TAB_CLOSED
// notification.
void RegisterNotification(
NavigationController* navigation_controller);
NotificationRegistrar registrar_;
// Set of tabs that should proceed
std::tr1::unordered_set<const TabContents*> tabs_;
DISALLOW_COPY_AND_ASSIGN(OfflineLoadService);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_OFFLINE_OFFLINE_LOAD_SERVICE_H_
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