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      1 // Copyright (c) 2012 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 WEBKIT_BROWSER_FILEAPI_SANDBOX_QUOTA_OBSERVER_H_
      6 #define WEBKIT_BROWSER_FILEAPI_SANDBOX_QUOTA_OBSERVER_H_
      7 
      8 #include <map>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/files/file_path.h"
     13 #include "base/memory/ref_counted.h"
     14 #include "base/memory/scoped_ptr.h"
     15 #include "base/memory/weak_ptr.h"
     16 #include "webkit/browser/fileapi/file_observers.h"
     17 #include "webkit/browser/fileapi/file_system_url.h"
     18 
     19 namespace base {
     20 class SequencedTaskRunner;
     21 }
     22 
     23 namespace quota {
     24 class QuotaManagerProxy;
     25 }
     26 
     27 namespace fileapi {
     28 
     29 class FileSystemUsageCache;
     30 class FileSystemURL;
     31 class TimedTaskHelper;
     32 class ObfuscatedFileUtil;
     33 
     34 class SandboxQuotaObserver
     35     : public FileUpdateObserver,
     36       public FileAccessObserver {
     37  public:
     38   typedef std::map<base::FilePath, int64> PendingUpdateNotificationMap;
     39 
     40   SandboxQuotaObserver(
     41       quota::QuotaManagerProxy* quota_manager_proxy,
     42       base::SequencedTaskRunner* update_notify_runner,
     43       ObfuscatedFileUtil* sandbox_file_util,
     44       FileSystemUsageCache* file_system_usage_cache_);
     45   virtual ~SandboxQuotaObserver();
     46 
     47   // FileUpdateObserver overrides.
     48   virtual void OnStartUpdate(const FileSystemURL& url) OVERRIDE;
     49   virtual void OnUpdate(const FileSystemURL& url, int64 delta) OVERRIDE;
     50   virtual void OnEndUpdate(const FileSystemURL& url) OVERRIDE;
     51 
     52   // FileAccessObserver overrides.
     53   virtual void OnAccess(const FileSystemURL& url) OVERRIDE;
     54 
     55   void SetUsageCacheEnabled(const GURL& origin,
     56                             FileSystemType type,
     57                             bool enabled);
     58 
     59  private:
     60   void ApplyPendingUsageUpdate();
     61   void UpdateUsageCacheFile(const base::FilePath& usage_file_path, int64 delta);
     62 
     63   base::FilePath GetUsageCachePath(const FileSystemURL& url);
     64 
     65   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
     66   scoped_refptr<base::SequencedTaskRunner> update_notify_runner_;
     67 
     68   // Not owned; sandbox_file_util_ should have identical lifetime with this.
     69   ObfuscatedFileUtil* sandbox_file_util_;
     70 
     71   // Not owned; file_system_usage_cache_ should have longer lifetime than this.
     72   FileSystemUsageCache* file_system_usage_cache_;
     73 
     74   PendingUpdateNotificationMap pending_update_notification_;
     75   scoped_ptr<TimedTaskHelper> delayed_cache_update_helper_;
     76 
     77   DISALLOW_COPY_AND_ASSIGN(SandboxQuotaObserver);
     78 };
     79 
     80 }  // namespace fileapi
     81 
     82 #endif  // WEBKIT_BROWSER_FILEAPI_SANDBOX_QUOTA_OBSERVER_H_
     83