1/* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef StorageAreaImpl_h 27#define StorageAreaImpl_h 28 29#include "StorageArea.h" 30#include "Timer.h" 31 32#include <wtf/HashMap.h> 33#include <wtf/PassRefPtr.h> 34#include <wtf/RefPtr.h> 35 36namespace WebCore { 37 38class SecurityOrigin; 39class StorageMap; 40class StorageAreaSync; 41 42class StorageAreaImpl : public StorageArea { 43public: 44 static PassRefPtr<StorageAreaImpl> create(StorageType, PassRefPtr<SecurityOrigin>, PassRefPtr<StorageSyncManager>, unsigned quota); 45 virtual ~StorageAreaImpl(); 46 47 virtual unsigned length() override; 48 virtual String key(unsigned index) override; 49 virtual String item(const String& key) override; 50 virtual void setItem(Frame* sourceFrame, const String& key, const String& value, bool& quotaException) override; 51 virtual void removeItem(Frame* sourceFrame, const String& key) override; 52 virtual void clear(Frame* sourceFrame) override; 53 virtual bool contains(const String& key) override; 54 55 virtual bool canAccessStorage(Frame* sourceFrame) override; 56 virtual StorageType storageType() const override; 57 58 virtual size_t memoryBytesUsedByCache() override; 59 60 virtual void incrementAccessCount(); 61 virtual void decrementAccessCount(); 62 virtual void closeDatabaseIfIdle(); 63 64 PassRefPtr<StorageAreaImpl> copy(); 65 void close(); 66 67 // Only called from a background thread. 68 void importItems(const HashMap<String, String>& items); 69 70 // Used to clear a StorageArea and close db before backing db file is deleted. 71 void clearForOriginDeletion(); 72 73 void sync(); 74 75private: 76 StorageAreaImpl(StorageType, PassRefPtr<SecurityOrigin>, PassRefPtr<StorageSyncManager>, unsigned quota); 77 explicit StorageAreaImpl(StorageAreaImpl*); 78 79 void blockUntilImportComplete() const; 80 void closeDatabaseTimerFired(Timer<StorageAreaImpl>*); 81 82 void dispatchStorageEvent(const String& key, const String& oldValue, const String& newValue, Frame* sourceFrame); 83 84 StorageType m_storageType; 85 RefPtr<SecurityOrigin> m_securityOrigin; 86 RefPtr<StorageMap> m_storageMap; 87 88 RefPtr<StorageAreaSync> m_storageAreaSync; 89 RefPtr<StorageSyncManager> m_storageSyncManager; 90 91#ifndef NDEBUG 92 bool m_isShutdown; 93#endif 94 unsigned m_accessCount; 95 Timer<StorageAreaImpl> m_closeDatabaseTimer; 96}; 97 98} // namespace WebCore 99 100#endif // StorageAreaImpl_h 101