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chrome_appcache_service.h

// 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_APPCACHE_CHROME_APPCACHE_SERVICE_H_
#define CHROME_BROWSER_APPCACHE_CHROME_APPCACHE_SERVICE_H_

#include "base/ref_counted.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/host_content_settings_map.h"
#include "chrome/common/notification_registrar.h"
#include "webkit/appcache/appcache_policy.h"
#include "webkit/appcache/appcache_service.h"

class ChromeURLRequestContext;
class FilePath;

// An AppCacheService subclass used by the chrome. There is an instance
// associated with each Profile. This derivation adds refcounting semantics
// since a profile has multiple URLRequestContexts which refer to the same
// object, and those URLRequestContexts are refcounted independently of the
// owning profile.
//
// All methods, including the ctor and dtor, are expected to be called on
// the IO thread (unless specifically called out in doc comments).
class ChromeAppCacheService
    : public base::RefCountedThreadSafe<ChromeAppCacheService,
                                        ChromeThread::DeleteOnIOThread>,
      public appcache::AppCacheService,
      public appcache::AppCachePolicy,
      public NotificationObserver {
 public:
  ChromeAppCacheService(const FilePath& profile_path,
                        ChromeURLRequestContext* request_context);

  static void ClearLocalState(const FilePath& profile_path);

 private:
  friend class ChromeThread;
  friend class DeleteTask<ChromeAppCacheService>;

  class PromptDelegate;

  virtual ~ChromeAppCacheService();

  // AppCachePolicy overrides
  virtual bool CanLoadAppCache(const GURL& manifest_url);
  virtual int CanCreateAppCache(const GURL& manifest_url,
                                net::CompletionCallback* callback);

  // The DoPrompt and DidPrrompt methods are called on the UI thread, and
  // the following CallCallback method is called on the IO thread.
  void DoPrompt(const GURL& manifest_url, net::CompletionCallback* callback);
  void DidPrompt(int rv, const GURL& manifest_url,
                 net::CompletionCallback* callback);
  void CallCallback(int rv, net::CompletionCallback* callback);

  // NotificationObserver override
  virtual void Observe(NotificationType type,
                       const NotificationSource& source,
                       const NotificationDetails& details);

  scoped_refptr<HostContentSettingsMap> host_contents_settings_map_;
  NotificationRegistrar registrar_;
};

#endif  // CHROME_BROWSER_APPCACHE_CHROME_APPCACHE_SERVICE_H_

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