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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef ScrollManager_h | 5 #ifndef ScrollManager_h |
6 #define ScrollManager_h | 6 #define ScrollManager_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "core/page/EventWithHitTestResults.h" | 9 #include "core/page/EventWithHitTestResults.h" |
10 #include "platform/geometry/LayoutSize.h" | 10 #include "platform/geometry/LayoutSize.h" |
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88 void resize(const WebMouseEvent&); | 88 void resize(const WebMouseEvent&); |
89 // Clears |m_resizeScrollableArea|. if |shouldNotBeNull| is true this | 89 // Clears |m_resizeScrollableArea|. if |shouldNotBeNull| is true this |
90 // function DCHECKs to make sure that variable is indeed not null. | 90 // function DCHECKs to make sure that variable is indeed not null. |
91 void clearResizeScrollableArea(bool shouldNotBeNull); | 91 void clearResizeScrollableArea(bool shouldNotBeNull); |
92 void setResizeScrollableArea(PaintLayer*, IntPoint); | 92 void setResizeScrollableArea(PaintLayer*, IntPoint); |
93 | 93 |
94 private: | 94 private: |
95 WebInputEventResult handleGestureScrollUpdate(const WebGestureEvent&); | 95 WebInputEventResult handleGestureScrollUpdate(const WebGestureEvent&); |
96 WebInputEventResult handleGestureScrollBegin(const WebGestureEvent&); | 96 WebInputEventResult handleGestureScrollBegin(const WebGestureEvent&); |
97 | 97 |
98 WebInputEventResult passScrollGestureEventToWidget(const WebGestureEvent&, | 98 WebInputEventResult passScrollGestureEvent(const WebGestureEvent&, |
99 LayoutObject*); | 99 LayoutObject*); |
100 | 100 |
101 void clearGestureScrollState(); | 101 void clearGestureScrollState(); |
102 | 102 |
103 void customizedScroll(const Node& startNode, ScrollState&); | 103 void customizedScroll(const Node& startNode, ScrollState&); |
104 | 104 |
105 FrameHost* frameHost() const; | 105 FrameHost* frameHost() const; |
106 | 106 |
107 bool isViewportScrollingElement(const Element&) const; | 107 bool isViewportScrollingElement(const Element&) const; |
108 | 108 |
109 bool handleScrollGestureOnResizer(Node*, const WebGestureEvent&); | 109 bool handleScrollGestureOnResizer(Node*, const WebGestureEvent&); |
110 | 110 |
111 void recomputeScrollChain(const Node& startNode, | 111 void recomputeScrollChain(const Node& startNode, |
112 std::deque<int>& scrollChain); | 112 std::deque<int>& scrollChain); |
113 | 113 |
114 // NOTE: If adding a new field to this class please ensure that it is | 114 // NOTE: If adding a new field to this class please ensure that it is |
115 // cleared in |ScrollManager::clear()|. | 115 // cleared in |ScrollManager::clear()|. |
116 | 116 |
117 const Member<LocalFrame> m_frame; | 117 const Member<LocalFrame> m_frame; |
118 | 118 |
119 // Only used with the ScrollCustomization runtime enabled feature. | 119 // Only used with the ScrollCustomization runtime enabled feature. |
120 std::deque<int> m_currentScrollChain; | 120 std::deque<int> m_currentScrollChain; |
121 | 121 |
122 Member<Node> m_scrollGestureHandlingNode; | 122 Member<Node> m_scrollGestureHandlingNode; |
123 | 123 |
124 bool m_lastGestureScrollOverWidget; | 124 bool m_lastGestureScrollOverFrameViewBase; |
125 | 125 |
126 // The most recent element to scroll natively during this scroll | 126 // The most recent element to scroll natively during this scroll |
127 // sequence. Null if no native element has scrolled this scroll | 127 // sequence. Null if no native element has scrolled this scroll |
128 // sequence, or if the most recent element to scroll used scroll | 128 // sequence, or if the most recent element to scroll used scroll |
129 // customization. | 129 // customization. |
130 Member<Element> m_previousGestureScrolledElement; | 130 Member<Element> m_previousGestureScrolledElement; |
131 | 131 |
132 // True iff some of the delta has been consumed for the current | 132 // True iff some of the delta has been consumed for the current |
133 // scroll sequence in this frame, or any child frames. Only used | 133 // scroll sequence in this frame, or any child frames. Only used |
134 // with ScrollCustomization. If some delta has been consumed, a | 134 // with ScrollCustomization. If some delta has been consumed, a |
135 // scroll which shouldn't propagate can't cause any element to | 135 // scroll which shouldn't propagate can't cause any element to |
136 // scroll other than the |m_previousGestureScrolledNode|. | 136 // scroll other than the |m_previousGestureScrolledNode|. |
137 bool m_deltaConsumedForScrollSequence; | 137 bool m_deltaConsumedForScrollSequence; |
138 | 138 |
139 Member<Scrollbar> m_scrollbarHandlingScrollGesture; | 139 Member<Scrollbar> m_scrollbarHandlingScrollGesture; |
140 | 140 |
141 Member<PaintLayerScrollableArea> m_resizeScrollableArea; | 141 Member<PaintLayerScrollableArea> m_resizeScrollableArea; |
142 | 142 |
143 LayoutSize | 143 LayoutSize |
144 m_offsetFromResizeCorner; // In the coords of m_resizeScrollableArea. | 144 m_offsetFromResizeCorner; // In the coords of m_resizeScrollableArea. |
145 }; | 145 }; |
146 | 146 |
147 } // namespace blink | 147 } // namespace blink |
148 | 148 |
149 #endif // ScrollManager_h | 149 #endif // ScrollManager_h |
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