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 BackForwardList_h 29#define BackForwardList_h 30 31#include "BackForwardClient.h" 32#include <wtf/HashSet.h> 33#include <wtf/Vector.h> 34 35namespace WebCore { 36 37class Page; 38 39typedef Vector<RefPtr<HistoryItem>> HistoryItemVector; 40typedef HashSet<RefPtr<HistoryItem>> HistoryItemHashSet; 41 42class BackForwardList : public BackForwardClient { 43public: 44 static PassRefPtr<BackForwardList> create(Page* page) { return adoptRef(new BackForwardList(page)); } 45 virtual ~BackForwardList(); 46 47 Page* page() { return m_page; } 48 49 virtual void addItem(PassRefPtr<HistoryItem>) override; 50 void goBack(); 51 void goForward(); 52 virtual void goToItem(HistoryItem*) override; 53 54 HistoryItem* backItem(); 55 HistoryItem* currentItem(); 56 HistoryItem* forwardItem(); 57 virtual HistoryItem* itemAtIndex(int) override; 58 59 void backListWithLimit(int, HistoryItemVector&); 60 void forwardListWithLimit(int, HistoryItemVector&); 61 62 int capacity(); 63 void setCapacity(int); 64 bool enabled(); 65 void setEnabled(bool); 66 virtual int backListCount() override; 67 virtual int forwardListCount() override; 68 bool containsItem(HistoryItem*); 69 70 virtual void close() override; 71 bool closed(); 72 73 void removeItem(HistoryItem*); 74 HistoryItemVector& entries(); 75 76#if PLATFORM(IOS) 77 virtual unsigned current() override; 78 virtual void setCurrent(unsigned newCurrent) override; 79 80 virtual bool clearAllPageCaches() override; 81#endif 82 83private: 84 explicit BackForwardList(Page*); 85 86 Page* m_page; 87 HistoryItemVector m_entries; 88 HistoryItemHashSet m_entryHash; 89 unsigned m_current; 90 unsigned m_capacity; 91 bool m_closed; 92 bool m_enabled; 93}; 94 95} // namespace WebCore 96 97#endif // BackForwardList_h 98