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 | #include "config.h" |
27 | #include "BackForwardController.h" |
28 | |
29 | #include "BackForwardClient.h" |
30 | #include "HistoryItem.h" |
31 | #include "Page.h" |
32 | #include "ShouldTreatAsContinuingLoad.h" |
33 | |
34 | namespace WebCore { |
35 | |
36 | BackForwardController::BackForwardController(Page& page, Ref<BackForwardClient>&& client) |
37 | : m_page(page) |
38 | , m_client(WTFMove(client)) |
39 | { |
40 | } |
41 | |
42 | BackForwardController::~BackForwardController() = default; |
43 | |
44 | RefPtr<HistoryItem> BackForwardController::backItem() |
45 | { |
46 | return itemAtIndex(-1); |
47 | } |
48 | |
49 | RefPtr<HistoryItem> BackForwardController::currentItem() |
50 | { |
51 | return itemAtIndex(0); |
52 | } |
53 | |
54 | RefPtr<HistoryItem> BackForwardController::forwardItem() |
55 | { |
56 | return itemAtIndex(1); |
57 | } |
58 | |
59 | bool BackForwardController::canGoBackOrForward(int distance) const |
60 | { |
61 | if (!distance) |
62 | return true; |
63 | if (distance > 0 && static_cast<unsigned>(distance) <= forwardCount()) |
64 | return true; |
65 | if (distance < 0 && static_cast<unsigned>(-distance) <= backCount()) |
66 | return true; |
67 | return false; |
68 | } |
69 | |
70 | void BackForwardController::goBackOrForward(int distance) |
71 | { |
72 | if (!distance) |
73 | return; |
74 | |
75 | auto historyItem = itemAtIndex(distance); |
76 | if (!historyItem) { |
77 | if (distance > 0) { |
78 | if (int forwardCount = this->forwardCount()) |
79 | historyItem = itemAtIndex(forwardCount); |
80 | } else { |
81 | if (int backCount = this->backCount()) |
82 | historyItem = itemAtIndex(-backCount); |
83 | } |
84 | } |
85 | |
86 | if (!historyItem) |
87 | return; |
88 | |
89 | m_page.goToItem(*historyItem, FrameLoadType::IndexedBackForward, ShouldTreatAsContinuingLoad::No); |
90 | } |
91 | |
92 | bool BackForwardController::goBack() |
93 | { |
94 | auto historyItem = backItem(); |
95 | if (!historyItem) |
96 | return false; |
97 | |
98 | m_page.goToItem(*historyItem, FrameLoadType::Back, ShouldTreatAsContinuingLoad::No); |
99 | return true; |
100 | } |
101 | |
102 | bool BackForwardController::goForward() |
103 | { |
104 | auto historyItem = forwardItem(); |
105 | if (!historyItem) |
106 | return false; |
107 | |
108 | m_page.goToItem(*historyItem, FrameLoadType::Forward, ShouldTreatAsContinuingLoad::No); |
109 | return true; |
110 | } |
111 | |
112 | void BackForwardController::addItem(Ref<HistoryItem>&& item) |
113 | { |
114 | m_client->addItem(WTFMove(item)); |
115 | } |
116 | |
117 | void BackForwardController::setCurrentItem(HistoryItem& item) |
118 | { |
119 | m_client->goToItem(item); |
120 | } |
121 | |
122 | unsigned BackForwardController::count() const |
123 | { |
124 | return m_client->backListCount() + 1 + m_client->forwardListCount(); |
125 | } |
126 | |
127 | unsigned BackForwardController::backCount() const |
128 | { |
129 | return m_client->backListCount(); |
130 | } |
131 | |
132 | unsigned BackForwardController::forwardCount() const |
133 | { |
134 | return m_client->forwardListCount(); |
135 | } |
136 | |
137 | RefPtr<HistoryItem> BackForwardController::itemAtIndex(int i) |
138 | { |
139 | return m_client->itemAtIndex(i); |
140 | } |
141 | |
142 | void BackForwardController::close() |
143 | { |
144 | m_client->close(); |
145 | } |
146 | |
147 | } // namespace WebCore |
148 | |