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1 /* | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 * Copyright (C) 2015 Google Inc. All rights reserved. | 2 // Use of this source code is governed by a BSD-style license that can be |
3 * | 3 // found in the LICENSE file. |
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 * | |
8 * 1. Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright | |
11 * notice, this list of conditions and the following disclaimer in the | |
12 * documentation and/or other materials provided with the distribution. | |
13 * | |
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 */ | |
25 | 4 |
26 #include "config.h" | 5 #include "config.h" |
27 #include "TopControls.h" | 6 #include "TopControls.h" |
28 | 7 |
29 #include "core/frame/FrameHost.h" | 8 #include "core/frame/FrameHost.h" |
30 #include "core/page/Chrome.h" | 9 #include "core/page/Chrome.h" |
31 #include "core/page/ChromeClient.h" | 10 #include "core/page/ChromeClient.h" |
32 #include "platform/geometry/FloatSize.h" | 11 #include "platform/geometry/FloatSize.h" |
33 #include <algorithm> // for std::min and std::max | 12 #include <algorithm> // for std::min and std::max |
34 | 13 |
35 namespace blink { | 14 namespace blink { |
36 | 15 |
37 TopControls::TopControls(const FrameHost& frameHost) | 16 TopControls::TopControls(const FrameHost& frameHost) |
38 : m_frameHost(frameHost) | 17 : m_frameHost(&frameHost) |
39 , m_height(0) | 18 , m_height(0) |
40 , m_shownRatio(0) | 19 , m_shownRatio(0) |
41 , m_baselineContentOffset(0) | 20 , m_baselineContentOffset(0) |
42 , m_accumulatedScrollDelta(0) | 21 , m_accumulatedScrollDelta(0) |
43 , m_shrinkViewport(false) | 22 , m_shrinkViewport(false) |
44 , m_permittedState(WebTopControlsBoth) | 23 , m_permittedState(WebTopControlsBoth) |
45 { | 24 { |
46 } | 25 } |
47 | 26 |
| 27 TopControls::~TopControls() |
| 28 { |
| 29 } |
| 30 |
| 31 void TopControls::trace(Visitor* visitor) |
| 32 { |
| 33 visitor->trace(m_frameHost); |
| 34 } |
| 35 |
48 void TopControls::scrollBegin() | 36 void TopControls::scrollBegin() |
49 { | 37 { |
50 resetBaseline(); | 38 resetBaseline(); |
51 } | 39 } |
52 | 40 |
53 FloatSize TopControls::scrollBy(FloatSize pendingDelta) | 41 FloatSize TopControls::scrollBy(FloatSize pendingDelta) |
54 { | 42 { |
55 if ((m_permittedState == WebTopControlsShown && pendingDelta.height() < 0) |
| (m_permittedState == WebTopControlsHidden && pendingDelta.height() > 0)) | 43 if ((m_permittedState == WebTopControlsShown && pendingDelta.height() < 0) |
| (m_permittedState == WebTopControlsHidden && pendingDelta.height() > 0)) |
56 return pendingDelta; | 44 return pendingDelta; |
57 | 45 |
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90 | 78 |
91 void TopControls::setShownRatio(float shownRatio) | 79 void TopControls::setShownRatio(float shownRatio) |
92 { | 80 { |
93 shownRatio = std::min(shownRatio, 1.f); | 81 shownRatio = std::min(shownRatio, 1.f); |
94 shownRatio = std::max(shownRatio, 0.f); | 82 shownRatio = std::max(shownRatio, 0.f); |
95 | 83 |
96 if (m_shownRatio == shownRatio) | 84 if (m_shownRatio == shownRatio) |
97 return; | 85 return; |
98 | 86 |
99 m_shownRatio = shownRatio; | 87 m_shownRatio = shownRatio; |
100 m_frameHost.chrome().client().didUpdateTopControls(); | 88 m_frameHost->chrome().client().didUpdateTopControls(); |
101 } | 89 } |
102 | 90 |
103 void TopControls::updateConstraints(WebTopControlsState constraints) | 91 void TopControls::updateConstraints(WebTopControlsState constraints) |
104 { | 92 { |
105 m_permittedState = constraints; | 93 m_permittedState = constraints; |
106 } | 94 } |
107 | 95 |
108 void TopControls::setHeight(float height, bool shrinkViewport) | 96 void TopControls::setHeight(float height, bool shrinkViewport) |
109 { | 97 { |
110 if (m_height == height && m_shrinkViewport == shrinkViewport) | 98 if (m_height == height && m_shrinkViewport == shrinkViewport) |
111 return; | 99 return; |
112 | 100 |
113 m_height = height; | 101 m_height = height; |
114 m_shrinkViewport = shrinkViewport; | 102 m_shrinkViewport = shrinkViewport; |
115 m_frameHost.chrome().client().didUpdateTopControls(); | 103 m_frameHost->chrome().client().didUpdateTopControls(); |
116 } | 104 } |
117 | 105 |
118 } // namespace blink | 106 } // namespace blink |
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