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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
      6 #define CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
      7 #pragma once
      8 
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/task.h"
     11 #include "content/browser/appcache/chrome_appcache_service.h"
     12 #include "googleurl/src/gurl.h"
     13 #include "net/url_request/url_request_context_getter.h"
     14 
     15 class Profile;
     16 
     17 // This class fetches appcache information on behalf of a caller
     18 // on the UI thread.
     19 class BrowsingDataAppCacheHelper
     20     : public base::RefCountedThreadSafe<BrowsingDataAppCacheHelper> {
     21  public:
     22   explicit BrowsingDataAppCacheHelper(Profile* profile);
     23 
     24   virtual void StartFetching(Callback0::Type* completion_callback);
     25   virtual void CancelNotification();
     26   virtual void DeleteAppCacheGroup(const GURL& manifest_url);
     27 
     28   appcache::AppCacheInfoCollection* info_collection() const {
     29     DCHECK(!is_fetching_);
     30     return info_collection_;
     31   }
     32 
     33  protected:
     34   friend class base::RefCountedThreadSafe<BrowsingDataAppCacheHelper>;
     35   virtual ~BrowsingDataAppCacheHelper();
     36 
     37   scoped_ptr<Callback0::Type> completion_callback_;
     38   scoped_refptr<appcache::AppCacheInfoCollection> info_collection_;
     39 
     40  private:
     41   void OnFetchComplete(int rv);
     42   ChromeAppCacheService* GetAppCacheService();
     43 
     44   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
     45   bool is_fetching_;
     46   scoped_refptr<net::CancelableCompletionCallback<BrowsingDataAppCacheHelper> >
     47       appcache_info_callback_;
     48 
     49   DISALLOW_COPY_AND_ASSIGN(BrowsingDataAppCacheHelper);
     50 };
     51 
     52 // This class is a thin wrapper around BrowsingDataAppCacheHelper that does not
     53 // fetch its information from the appcache service, but gets them passed as
     54 // a parameter during construction.
     55 class CannedBrowsingDataAppCacheHelper : public BrowsingDataAppCacheHelper {
     56  public:
     57   explicit CannedBrowsingDataAppCacheHelper(Profile* profile);
     58 
     59   // Return a copy of the appcache helper. Only one consumer can use the
     60   // StartFetching method at a time, so we need to create a copy of the helper
     61   // everytime we instantiate a cookies tree model for it.
     62   CannedBrowsingDataAppCacheHelper* Clone();
     63 
     64   // Add an appcache to the set of canned caches that is returned by this
     65   // helper.
     66   void AddAppCache(const GURL& manifest_url);
     67 
     68   // Clears the list of canned caches.
     69   void Reset();
     70 
     71   // True if no appcaches are currently stored.
     72   bool empty() const;
     73 
     74   // BrowsingDataAppCacheHelper methods.
     75   virtual void StartFetching(Callback0::Type* completion_callback);
     76   virtual void CancelNotification() {}
     77 
     78  private:
     79   virtual ~CannedBrowsingDataAppCacheHelper();
     80 
     81   Profile* profile_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataAppCacheHelper);
     84 };
     85 
     86 #endif  // CHROME_BROWSER_BROWSING_DATA_APPCACHE_HELPER_H_
     87