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
39 using namespace WebCore;
40
41 namespace WebKit {
42
43 const char backForwardNavigationScheme[] = "chrome-back-forward";
44
create(WebViewImpl * webView)45 PassRefPtr<BackForwardListChromium> BackForwardListChromium::create(WebViewImpl* webView)
46 {
47 return adoptRef(new BackForwardListChromium(webView));
48 }
49
BackForwardListChromium(WebViewImpl * webView)50 BackForwardListChromium::BackForwardListChromium(WebViewImpl* webView)
51 : m_webView(webView)
52 {
53 }
54
~BackForwardListChromium()55 BackForwardListChromium::~BackForwardListChromium()
56 {
57 }
58
addItem(PassRefPtr<HistoryItem> item)59 void 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
goToItem(HistoryItem * item)71 void BackForwardListChromium::goToItem(HistoryItem* item)
72 {
73 m_currentItem = item;
74
75 if (m_pendingHistoryItem == item)
76 m_pendingHistoryItem = 0;
77 }
78
itemAtIndex(int index)79 HistoryItem* 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
backListCount()104 int BackForwardListChromium::backListCount()
105 {
106 if (!m_webView->client())
107 return 0;
108
109 return m_webView->client()->historyBackListCount();
110 }
111
forwardListCount()112 int BackForwardListChromium::forwardListCount()
113 {
114 if (!m_webView->client())
115 return 0;
116
117 return m_webView->client()->historyForwardListCount();
118 }
119
isActive()120 bool BackForwardListChromium::isActive()
121 {
122 return m_webView->client();
123 }
124
close()125 void BackForwardListChromium::close()
126 {
127 m_currentItem = 0;
128 m_pendingHistoryItem = 0;
129 }
130
131 } // namespace WebKit
132