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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 "BackForwardListClientImpl.h" | |
33 | |
34 #include "HistoryItem.h" | |
35 #include "WebViewClient.h" | |
36 #include "WebViewImpl.h" | |
37 | |
38 using namespace WebCore; | |
39 | |
40 namespace WebKit { | |
41 | |
42 const char backForwardNavigationScheme[] = "chrome-back-forward"; | |
43 | |
44 BackForwardListClientImpl::BackForwardListClientImpl(WebViewImpl* webView) | |
45 : m_webView(webView) | |
46 { | |
47 } | |
48 | |
49 BackForwardListClientImpl::~BackForwardListClientImpl() | |
50 { | |
51 } | |
52 | |
53 void BackForwardListClientImpl::setCurrentHistoryItem(HistoryItem* item) | |
54 { | |
55 m_previousItem = m_currentItem; | |
56 m_currentItem = item; | |
57 } | |
58 | |
59 HistoryItem* BackForwardListClientImpl::previousHistoryItem() const | |
60 { | |
61 return m_previousItem.get(); | |
62 } | |
63 | |
64 void BackForwardListClientImpl::addItem(PassRefPtr<HistoryItem> item) | |
65 { | |
66 m_previousItem = m_currentItem; | |
67 m_currentItem = item; | |
68 | |
69 // If WebCore adds a new HistoryItem, it means this is a new navigation (ie, | |
70 // not a reload or back/forward). | |
71 m_webView->observeNewNavigation(); | |
72 | |
73 if (m_webView->client()) | |
74 m_webView->client()->didAddHistoryItem(); | |
75 } | |
76 | |
77 void BackForwardListClientImpl::goToItem(HistoryItem* item) | |
78 { | |
79 m_previousItem = m_currentItem; | |
80 m_currentItem = item; | |
81 | |
82 if (m_pendingHistoryItem == item) | |
83 m_pendingHistoryItem = 0; | |
84 } | |
85 | |
86 HistoryItem* BackForwardListClientImpl::currentItem() | |
87 { | |
88 return m_currentItem.get(); | |
89 } | |
90 | |
91 HistoryItem* BackForwardListClientImpl::itemAtIndex(int index) | |
92 { | |
93 if (!m_webView->client()) | |
94 return 0; | |
95 | |
96 // Since we don't keep the entire back/forward list, we have no way to | |
97 // properly implement this method. We return a dummy entry instead that we | |
98 // intercept in our FrameLoaderClient implementation in case WebCore asks | |
99 // to navigate to this HistoryItem. | |
100 | |
101 // FIXME: We should change WebCore to handle history.{back,forward,go} | |
102 // differently. It should perhaps just ask the FrameLoaderClient to | |
103 // perform those navigations. | |
104 | |
105 String url_string = String::format( | |
106 "%s://go/%d", backForwardNavigationScheme, index); | |
107 | |
108 m_pendingHistoryItem = | |
109 HistoryItem::create(url_string, String(), 0.0); | |
110 return m_pendingHistoryItem.get(); | |
111 } | |
112 | |
113 int BackForwardListClientImpl::backListCount() | |
114 { | |
115 if (!m_webView->client()) | |
116 return 0; | |
117 | |
118 return m_webView->client()->historyBackListCount(); | |
119 } | |
120 | |
121 int BackForwardListClientImpl::forwardListCount() | |
122 { | |
123 if (!m_webView->client()) | |
124 return 0; | |
125 | |
126 return m_webView->client()->historyForwardListCount(); | |
127 } | |
128 | |
129 void BackForwardListClientImpl::close() | |
130 { | |
131 m_currentItem = 0; | |
132 m_previousItem = 0; | |
133 m_pendingHistoryItem = 0; | |
134 } | |
135 | |
136 } // namespace WebKit | |
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