webkit/browser/fileapi/file_system_quota_util.h

   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_FILE_SYSTEM_QUOTA_UTIL_H_
   6 #define WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_QUOTA_UTIL_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/files/file.h"
  13 #include "url/gurl.h"
  14 #include "webkit/browser/fileapi/task_runner_bound_observer_list.h"
  15 #include "webkit/browser/webkit_storage_browser_export.h"
  16 #include "webkit/common/fileapi/file_system_types.h"
  17
  18 namespace base {
  19 class SequencedTaskRunner;
  20 }
  21
  22 namespace quota {
  23 class QuotaManagerProxy;
  24 }
  25
  26 namespace fileapi {
  27
  28 class FileSystemContext;
  29 class QuotaReservation;
  30
  31 // An abstract interface that provides common quota-related utility functions
  32 // for file_system_quota_client.
  33 // All the methods of this class are synchronous and need to be called on
  34 // the thread that the method name implies.
  35 class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemQuotaUtil {
  36  public:
  37   virtual ~FileSystemQuotaUtil() {}
  38
  39   // Deletes the data on the origin and reports the amount of deleted data
  40   // to the quota manager via |proxy|.
  41   virtual base::File::Error DeleteOriginDataOnFileTaskRunner(
  42       FileSystemContext* context,
  43       quota::QuotaManagerProxy* proxy,
  44       const GURL& origin_url,
  45       FileSystemType type) = 0;
  46
  47   virtual void GetOriginsForTypeOnFileTaskRunner(
  48       fileapi::FileSystemType type,
  49       std::set<GURL>* origins) = 0;
  50
  51   virtual void GetOriginsForHostOnFileTaskRunner(
  52       fileapi::FileSystemType type,
  53       const std::string& host,
  54       std::set<GURL>* origins) = 0;
  55
  56   // Returns the amount of data used for the origin for usage tracking.
  57   virtual int64 GetOriginUsageOnFileTaskRunner(
  58       fileapi::FileSystemContext* file_system_context,
  59       const GURL& origin_url,
  60       fileapi::FileSystemType type) = 0;
  61
  62   // Creates new reservation object for the origin and the type.
  63   virtual scoped_refptr<QuotaReservation>
  64       CreateQuotaReservationOnFileTaskRunner(
  65           const GURL& origin_url,
  66           FileSystemType type) = 0;
  67
  68   virtual void AddFileUpdateObserver(
  69       FileSystemType type,
  70       FileUpdateObserver* observer,
  71       base::SequencedTaskRunner* task_runner) = 0;
  72   virtual void AddFileChangeObserver(
  73       FileSystemType type,
  74       FileChangeObserver* observer,
  75       base::SequencedTaskRunner* task_runner) = 0;
  76   virtual void AddFileAccessObserver(
  77       FileSystemType type,
  78       FileAccessObserver* observer,
  79       base::SequencedTaskRunner* task_runner) = 0;
  80
  81   // Returns the observer list for |type|, or returns NULL if any observers
  82   // have not been registered on |type|.
  83   virtual const UpdateObserverList* GetUpdateObservers(
  84       FileSystemType type) const = 0;
  85   virtual const ChangeObserverList* GetChangeObservers(
  86       FileSystemType type) const = 0;
  87   virtual const AccessObserverList* GetAccessObservers(
  88       FileSystemType type) const = 0;
  89 };
  90
  91 }  // namespace fileapi
  92
  93 #endif  // WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_QUOTA_UTIL_H_