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
BackForwardListClientImpl(WebViewImpl * webView)44 BackForwardListClientImpl::BackForwardListClientImpl(WebViewImpl* webView)
45 : m_webView(webView)
46 {
47 }
48
~BackForwardListClientImpl()49 BackForwardListClientImpl::~BackForwardListClientImpl()
50 {
51 }
52
setCurrentHistoryItem(HistoryItem * item)53 void BackForwardListClientImpl::setCurrentHistoryItem(HistoryItem* item)
54 {
55 m_previousItem = m_currentItem;
56 m_currentItem = item;
57 }
58
previousHistoryItem() const59 HistoryItem* BackForwardListClientImpl::previousHistoryItem() const
60 {
61 return m_previousItem.get();
62 }
63
addItem(PassRefPtr<HistoryItem> item)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
goToItem(HistoryItem * item)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
currentItem()86 HistoryItem* BackForwardListClientImpl::currentItem()
87 {
88 return m_currentItem.get();
89 }
90
itemAtIndex(int index)91 HistoryItem* BackForwardListClientImpl::itemAtIndex(int index)
92 {
93 if (!m_webView->client() || index > forwardListCount() || -index > backListCount())
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
backListCount()113 int BackForwardListClientImpl::backListCount()
114 {
115 if (!m_webView->client())
116 return 0;
117
118 return m_webView->client()->historyBackListCount();
119 }
120
forwardListCount()121 int BackForwardListClientImpl::forwardListCount()
122 {
123 if (!m_webView->client())
124 return 0;
125
126 return m_webView->client()->historyForwardListCount();
127 }
128
close()129 void BackForwardListClientImpl::close()
130 {
131 m_currentItem = 0;
132 m_previousItem = 0;
133 m_pendingHistoryItem = 0;
134 }
135
136 } // namespace WebKit
137