Move storage-related files from webkit/ to new top-level directory storage/

webkit/browser/quota/storage_monitor.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEBKIT_BROWSER_QUOTA_STORAGE_MONITOR_H_
-#define WEBKIT_BROWSER_QUOTA_STORAGE_MONITOR_H_
-
-#include <map>
-
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "webkit/browser/quota/storage_observer.h"
-
-namespace content {
-class StorageMonitorTestBase;
-}
-
-namespace quota {
-
-class QuotaManager;
-
-// This class dispatches storage events to observers of a common
-// StorageObserver::Filter.
-class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE StorageObserverList {
- public:
-  StorageObserverList();
-  virtual ~StorageObserverList();
-
-  // Adds/removes an observer.
-  void AddObserver(StorageObserver* observer,
-                   const StorageObserver::MonitorParams& params);
-  void RemoveObserver(StorageObserver* observer);
-
-  // Returns the number of observers.
-  int ObserverCount() const;
-
-  // Forwards a storage change to observers. The event may be dispatched
-  // immediately to an observer or after a delay, depending on the desired event
-  // rate of the observer.
-  void OnStorageChange(const StorageObserver::Event& event);
-
-  // Dispatch an event to observers that require it.
-  void MaybeDispatchEvent(const StorageObserver::Event& event);
-
-  // Ensure the specified observer receives the next dispatched event.
-  void ScheduleUpdateForObserver(StorageObserver* observer);
-
- private:
-  struct WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE ObserverState {
-    GURL origin;
-    base::TimeTicks last_notification_time;
-    base::TimeDelta rate;
-    bool requires_update;
-
-    ObserverState();
-  };
-  typedef std::map<StorageObserver*, ObserverState> StorageObserverStateMap;
-
-  void DispatchPendingEvent();
-
-  StorageObserverStateMap observers_;
-  base::OneShotTimer<StorageObserverList> notification_timer_;
-  StorageObserver::Event pending_event_;
-
-  friend class content::StorageMonitorTestBase;
-
-  DISALLOW_COPY_AND_ASSIGN(StorageObserverList);
-};
-
-
-// Manages the storage observers of a common host. Caches the usage and quota of
-// the host to avoid accumulating for every change.
-class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE HostStorageObservers {
- public:
-  explicit HostStorageObservers(QuotaManager* quota_manager);
-  virtual ~HostStorageObservers();
-
-  bool is_initialized() const { return initialized_; }
-
-  // Adds/removes an observer.
-  void AddObserver(
-      StorageObserver* observer,
-      const StorageObserver::MonitorParams& params);
-  void RemoveObserver(StorageObserver* observer);
-  bool ContainsObservers() const;
-
-  // Handles a usage change.
-  void NotifyUsageChange(const StorageObserver::Filter& filter, int64 delta);
-
- private:
-  void StartInitialization(const StorageObserver::Filter& filter);
-  void GotHostUsageAndQuota(const StorageObserver::Filter& filter,
-                            QuotaStatusCode status,
-                            int64 usage,
-                            int64 quota);
-  void DispatchEvent(const StorageObserver::Filter& filter, bool is_update);
-
-  QuotaManager* quota_manager_;
-  StorageObserverList observers_;
-
-  // Flags used during initialization of the cached properties.
-  bool initialized_;
-  bool initializing_;
-  bool event_occurred_before_init_;
-  int64 usage_deltas_during_init_;
-
-  // Cached accumulated usage and quota for the host.
-  int64 cached_usage_;
-  int64 cached_quota_;
-
-  base::WeakPtrFactory<HostStorageObservers> weak_factory_;
-
-  friend class content::StorageMonitorTestBase;
-
-  DISALLOW_COPY_AND_ASSIGN(HostStorageObservers);
-};
-
-
-// Manages the observers of a common storage type.
-class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE StorageTypeObservers {
- public:
-  explicit StorageTypeObservers(QuotaManager* quota_manager);
-  virtual ~StorageTypeObservers();
-
-  // Adds and removes an observer.
-  void AddObserver(StorageObserver* observer,
-                   const StorageObserver::MonitorParams& params);
-  void RemoveObserver(StorageObserver* observer);
-  void RemoveObserverForFilter(StorageObserver* observer,
-                               const StorageObserver::Filter& filter);
-
-  // Returns the observers of a specific host.
-  const HostStorageObservers* GetHostObservers(const std::string& host) const;
-
-  // Handles a usage change.
-  void NotifyUsageChange(const StorageObserver::Filter& filter, int64 delta);
-
- private:
-  typedef std::map<std::string, HostStorageObservers*> HostObserversMap;
-
-  QuotaManager* quota_manager_;
-  HostObserversMap host_observers_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(StorageTypeObservers);
-};
-
-
-// Storage monitor manages observers and dispatches storage events to them.
-class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE StorageMonitor {
- public:
-  explicit StorageMonitor(QuotaManager* quota_manager);
-  virtual ~StorageMonitor();
-
-  // Adds and removes an observer.
-  void AddObserver(StorageObserver* observer,
-                   const StorageObserver::MonitorParams& params);
-  void RemoveObserver(StorageObserver* observer);
-  void RemoveObserverForFilter(StorageObserver* observer,
-                               const StorageObserver::Filter& filter);
-
-  // Returns the observers of a specific storage type.
-  const StorageTypeObservers* GetStorageTypeObservers(
-      StorageType storage_type) const;
-
-  // Handles a usage change.
-  void NotifyUsageChange(const StorageObserver::Filter& filter, int64 delta);
-
- private:
-  typedef std::map<StorageType, StorageTypeObservers*> StorageTypeObserversMap;
-
-  QuotaManager* quota_manager_;
-  StorageTypeObserversMap storage_type_observers_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(StorageMonitor);
-};
-
-}  // namespace quota
-
-#endif  // WEBKIT_BROWSER_QUOTA_STORAGE_MONITOR_H_