1 /* 2 * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef BackForwardController_h 27 #define BackForwardController_h 28 29 #include <wtf/Noncopyable.h> 30 #include <wtf/Forward.h> 31 #include <wtf/RefPtr.h> 32 33 namespace WebCore { 34 35 class BackForwardList; 36 class HistoryItem; 37 class Page; 38 39 class BackForwardController { 40 WTF_MAKE_NONCOPYABLE(BackForwardController); WTF_MAKE_FAST_ALLOCATED; 41 public: 42 BackForwardController(Page*, PassRefPtr<BackForwardList>); 43 ~BackForwardController(); 44 45 BackForwardList* client() const { return m_client.get(); } 46 47 bool canGoBackOrForward(int distance) const; 48 void goBackOrForward(int distance); 49 50 bool goBack(); 51 bool goForward(); 52 53 void addItem(PassRefPtr<HistoryItem>); 54 void setCurrentItem(HistoryItem*); 55 56 int count() const; 57 int backCount() const; 58 int forwardCount() const; 59 60 HistoryItem* itemAtIndex(int); 61 62 bool isActive(); 63 64 void close(); 65 66 HistoryItem* backItem() { return itemAtIndex(-1); } 67 HistoryItem* currentItem() { return itemAtIndex(0); } 68 HistoryItem* forwardItem() { return itemAtIndex(1); } 69 70 private: 71 Page* m_page; 72 RefPtr<BackForwardList> m_client; 73 }; 74 75 } // namespace WebCore 76 77 #endif // BackForwardController_h 78
