1/* 2 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved. 3 * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 4 * Copyright (C) 2009 Google, Inc. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#ifndef BackForwardClient_h 29#define BackForwardClient_h 30 31#include <wtf/Forward.h> 32#include <wtf/RefCounted.h> 33 34namespace WebCore { 35 36class HistoryItem; 37 38class BackForwardClient : public RefCounted<BackForwardClient> { 39public: 40 virtual ~BackForwardClient() 41 { 42 } 43 44 virtual void addItem(PassRefPtr<HistoryItem>) = 0; 45 46 virtual void goToItem(HistoryItem*) = 0; 47 48 virtual HistoryItem* itemAtIndex(int) = 0; 49 virtual int backListCount() = 0; 50 virtual int forwardListCount() = 0; 51 52 virtual void close() = 0; 53 54#if PLATFORM(IOS) 55 // FIXME: These methods seem to violate the encapsulation of this class. 56 virtual unsigned current() = 0; 57 virtual void setCurrent(unsigned newCurrent) = 0; 58 59 // FIXME: Consider renaming this method once we upstream the iOS changes to WebView.mm. 60 virtual bool clearAllPageCaches() = 0; 61#endif 62 63 // FIXME: Delete these once all callers are using BackForwardController 64 // instead of calling this directly. 65 HistoryItem* backItem() { return itemAtIndex(-1); } 66 HistoryItem* currentItem() { return itemAtIndex(0); } 67 HistoryItem* forwardItem() { return itemAtIndex(1); } 68}; 69 70} // namespace WebCore 71 72#endif // BackForwardClient_h 73