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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 STORAGE_BROWSER_FILEAPI_SANDBOX_QUOTA_OBSERVER_H_
      6 #define STORAGE_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 "storage/browser/fileapi/file_observers.h"
     17 #include "storage/browser/fileapi/file_system_url.h"
     18 
     19 namespace base {
     20 class SequencedTaskRunner;
     21 }
     22 
     23 namespace storage {
     24 class QuotaManagerProxy;
     25 }
     26 
     27 namespace storage {
     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(storage::QuotaManagerProxy* quota_manager_proxy,
     41                        base::SequencedTaskRunner* update_notify_runner,
     42                        ObfuscatedFileUtil* sandbox_file_util,
     43                        FileSystemUsageCache* file_system_usage_cache_);
     44   virtual ~SandboxQuotaObserver();
     45 
     46   // FileUpdateObserver overrides.
     47   virtual void OnStartUpdate(const FileSystemURL& url) OVERRIDE;
     48   virtual void OnUpdate(const FileSystemURL& url, int64 delta) OVERRIDE;
     49   virtual void OnEndUpdate(const FileSystemURL& url) OVERRIDE;
     50 
     51   // FileAccessObserver overrides.
     52   virtual void OnAccess(const FileSystemURL& url) OVERRIDE;
     53 
     54   void SetUsageCacheEnabled(const GURL& origin,
     55                             FileSystemType type,
     56                             bool enabled);
     57 
     58  private:
     59   void ApplyPendingUsageUpdate();
     60   void UpdateUsageCacheFile(const base::FilePath& usage_file_path, int64 delta);
     61 
     62   base::FilePath GetUsageCachePath(const FileSystemURL& url);
     63 
     64   scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy_;
     65   scoped_refptr<base::SequencedTaskRunner> update_notify_runner_;
     66 
     67   // Not owned; sandbox_file_util_ should have identical lifetime with this.
     68   ObfuscatedFileUtil* sandbox_file_util_;
     69 
     70   // Not owned; file_system_usage_cache_ should have longer lifetime than this.
     71   FileSystemUsageCache* file_system_usage_cache_;
     72 
     73   PendingUpdateNotificationMap pending_update_notification_;
     74   scoped_ptr<TimedTaskHelper> delayed_cache_update_helper_;
     75 
     76   DISALLOW_COPY_AND_ASSIGN(SandboxQuotaObserver);
     77 };
     78 
     79 }  // namespace storage
     80 
     81 #endif  // STORAGE_BROWSER_FILEAPI_SANDBOX_QUOTA_OBSERVER_H_
     82