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      1 // Copyright 2013 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_QUOTA_QUOTA_BACKEND_IMPL_H_
      6 #define WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_BACKEND_IMPL_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "base/memory/weak_ptr.h"
     10 #include "webkit/browser/fileapi/quota/quota_reservation_manager.h"
     11 #include "webkit/browser/fileapi/sandbox_file_system_backend_delegate.h"
     12 #include "webkit/browser/webkit_storage_browser_export.h"
     13 #include "webkit/common/quota/quota_status_code.h"
     14 
     15 namespace base {
     16 class SequencedTaskRunner;
     17 }
     18 
     19 namespace quota {
     20 class QuotaManagerProxy;
     21 }
     22 
     23 namespace fileapi {
     24 
     25 class FileSystemUsageCache;
     26 class ObfuscatedFileUtil;
     27 
     28 // An instance of this class is owned by QuotaReservationManager.
     29 class WEBKIT_STORAGE_BROWSER_EXPORT QuotaBackendImpl
     30     : public QuotaReservationManager::QuotaBackend {
     31  public:
     32   typedef QuotaReservationManager::ReserveQuotaCallback
     33       ReserveQuotaCallback;
     34 
     35   QuotaBackendImpl(base::SequencedTaskRunner* file_task_runner,
     36                    ObfuscatedFileUtil* obfuscated_file_util,
     37                    FileSystemUsageCache* file_system_usage_cache,
     38                    quota::QuotaManagerProxy* quota_manager_proxy);
     39   virtual ~QuotaBackendImpl();
     40 
     41   // QuotaReservationManager::QuotaBackend overrides.
     42   virtual void ReserveQuota(
     43       const GURL& origin,
     44       FileSystemType type,
     45       int64 delta,
     46       const ReserveQuotaCallback& callback) OVERRIDE;
     47   virtual void ReleaseReservedQuota(
     48       const GURL& origin,
     49       FileSystemType type,
     50       int64 size) OVERRIDE;
     51   virtual void CommitQuotaUsage(
     52       const GURL& origin,
     53       FileSystemType type,
     54       int64 delta) OVERRIDE;
     55   virtual void IncrementDirtyCount(
     56       const GURL& origin,
     57       FileSystemType type) OVERRIDE;
     58   virtual void DecrementDirtyCount(
     59       const GURL& origin,
     60       FileSystemType type) OVERRIDE;
     61 
     62  private:
     63   friend class QuotaBackendImplTest;
     64 
     65   struct QuotaReservationInfo {
     66     QuotaReservationInfo(const GURL& origin, FileSystemType type, int64 delta);
     67     ~QuotaReservationInfo();
     68 
     69     GURL origin;
     70     FileSystemType type;
     71     int64 delta;
     72   };
     73 
     74   void DidGetUsageAndQuotaForReserveQuota(
     75       const QuotaReservationInfo& info,
     76       const ReserveQuotaCallback& callback,
     77       quota::QuotaStatusCode status,
     78       int64 usage,
     79       int64 quota);
     80 
     81   void ReserveQuotaInternal(
     82       const QuotaReservationInfo& info);
     83   base::PlatformFileError GetUsageCachePath(
     84       const GURL& origin,
     85       FileSystemType type,
     86       base::FilePath* usage_file_path);
     87 
     88   scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
     89 
     90   // Owned by SandboxFileSystemBackendDelegate.
     91   ObfuscatedFileUtil* obfuscated_file_util_;
     92   FileSystemUsageCache* file_system_usage_cache_;
     93 
     94   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
     95 
     96   base::WeakPtrFactory<QuotaBackendImpl> weak_ptr_factory_;
     97 
     98   DISALLOW_COPY_AND_ASSIGN(QuotaBackendImpl);
     99 };
    100 
    101 }  // namespace fileapi
    102 
    103 #endif  // WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_BACKEND_IMPL_H_
    104