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 StorageArea_h 27#define StorageArea_h 28 29#include <wtf/Forward.h> 30#include <wtf/PassRefPtr.h> 31#include <wtf/RefCounted.h> 32#include <wtf/text/WTFString.h> 33 34namespace WebCore { 35 36class Frame; 37class StorageSyncManager; 38typedef int ExceptionCode; 39enum StorageType { LocalStorage, SessionStorage }; 40 41class StorageArea : public RefCounted<StorageArea> { 42public: 43 virtual ~StorageArea() { } 44 45 virtual unsigned length() = 0; 46 virtual String key(unsigned index) = 0; 47 virtual String item(const String& key) = 0; 48 virtual void setItem(Frame* sourceFrame, const String& key, const String& value, bool& quotaException) = 0; 49 virtual void removeItem(Frame* sourceFrame, const String& key) = 0; 50 virtual void clear(Frame* sourceFrame) = 0; 51 virtual bool contains(const String& key) = 0; 52 53 virtual bool canAccessStorage(Frame*) = 0; 54 virtual StorageType storageType() const = 0; 55 56 virtual size_t memoryBytesUsedByCache() = 0; 57 58 virtual void incrementAccessCount() { } 59 virtual void decrementAccessCount() { } 60 virtual void closeDatabaseIfIdle() { } 61}; 62 63} // namespace WebCore 64 65#endif // StorageArea_h 66