1/* 2 * Copyright (C) 2009 Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32#include "BackForwardListChromium.h" 33 34#include "HistoryItem.h" 35#include "WebViewClient.h" 36#include "WebViewImpl.h" 37#include <wtf/text/StringConcatenate.h> 38 39using namespace WebCore; 40 41namespace WebKit { 42 43const char backForwardNavigationScheme[] = "chrome-back-forward"; 44 45PassRefPtr<BackForwardListChromium> BackForwardListChromium::create(WebViewImpl* webView) 46{ 47 return adoptRef(new BackForwardListChromium(webView)); 48} 49 50BackForwardListChromium::BackForwardListChromium(WebViewImpl* webView) 51 : m_webView(webView) 52{ 53} 54 55BackForwardListChromium::~BackForwardListChromium() 56{ 57} 58 59void BackForwardListChromium::addItem(PassRefPtr<HistoryItem> item) 60{ 61 m_currentItem = item; 62 63 // If WebCore adds a new HistoryItem, it means this is a new navigation (ie, 64 // not a reload or back/forward). 65 m_webView->observeNewNavigation(); 66 67 if (m_webView->client()) 68 m_webView->client()->didAddHistoryItem(); 69} 70 71void BackForwardListChromium::goToItem(HistoryItem* item) 72{ 73 m_currentItem = item; 74 75 if (m_pendingHistoryItem == item) 76 m_pendingHistoryItem = 0; 77} 78 79HistoryItem* BackForwardListChromium::itemAtIndex(int index) 80{ 81 if (!m_webView->client()) 82 return 0; 83 84 if (!index) 85 return m_currentItem.get(); 86 87 if (index > forwardListCount() || -index > backListCount()) 88 return 0; 89 90 // Since we don't keep the entire back/forward list, we have no way to 91 // properly implement this method. We return a dummy entry instead that we 92 // intercept in our FrameLoaderClient implementation in case WebCore asks 93 // to navigate to this HistoryItem. 94 95 // FIXME: We should change WebCore to handle history.{back,forward,go} 96 // differently. It should perhaps just ask the FrameLoaderClient to 97 // perform those navigations. 98 99 String urlString = makeString(backForwardNavigationScheme, "://go/", String::number(index)); 100 m_pendingHistoryItem = HistoryItem::create(urlString, String(), 0); 101 return m_pendingHistoryItem.get(); 102} 103 104int BackForwardListChromium::backListCount() 105{ 106 if (!m_webView->client()) 107 return 0; 108 109 return m_webView->client()->historyBackListCount(); 110} 111 112int BackForwardListChromium::forwardListCount() 113{ 114 if (!m_webView->client()) 115 return 0; 116 117 return m_webView->client()->historyForwardListCount(); 118} 119 120bool BackForwardListChromium::isActive() 121{ 122 return m_webView->client(); 123} 124 125void BackForwardListChromium::close() 126{ 127 m_currentItem = 0; 128 m_pendingHistoryItem = 0; 129} 130 131} // namespace WebKit 132