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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/PlatformEvent.h" | 10 #include "platform/PlatformEvent.h" |
11 #include "platform/geometry/LayoutSize.h" | 11 #include "platform/geometry/LayoutSize.h" |
12 #include "platform/heap/Handle.h" | 12 #include "platform/heap/Handle.h" |
13 #include "platform/heap/Visitor.h" | 13 #include "platform/heap/Visitor.h" |
14 #include "platform/scroll/ScrollTypes.h" | 14 #include "platform/scroll/ScrollTypes.h" |
15 #include "public/platform/WebInputEventResult.h" | 15 #include "public/platform/WebInputEventResult.h" |
16 #include "wtf/Allocator.h" | 16 #include "wtf/Allocator.h" |
17 #include <deque> | 17 #include <deque> |
18 | 18 |
19 namespace blink { | 19 namespace blink { |
20 | 20 |
21 class AutoscrollController; | 21 class AutoscrollController; |
22 class FrameHost; | 22 class FrameHost; |
23 class LayoutBox; | 23 class LayoutBox; |
24 class LayoutObject; | 24 class LayoutObject; |
25 class LocalFrame; | 25 class LocalFrame; |
26 class PaintLayer; | 26 class PaintLayer; |
27 class PaintLayerScrollableArea; | 27 class PaintLayerScrollableArea; |
28 class PlatformGestureEvent; | |
29 class Scrollbar; | 28 class Scrollbar; |
30 class ScrollState; | 29 class ScrollState; |
| 30 class WebGestureEvent; |
31 | 31 |
32 // This class takes care of scrolling and resizing and the related states. The | 32 // This class takes care of scrolling and resizing and the related states. The |
33 // user action that causes scrolling or resizing is determined in other *Manager | 33 // user action that causes scrolling or resizing is determined in other *Manager |
34 // classes and they call into this class for doing the work. | 34 // classes and they call into this class for doing the work. |
35 class CORE_EXPORT ScrollManager | 35 class CORE_EXPORT ScrollManager |
36 : public GarbageCollectedFinalized<ScrollManager> { | 36 : public GarbageCollectedFinalized<ScrollManager> { |
37 WTF_MAKE_NONCOPYABLE(ScrollManager); | 37 WTF_MAKE_NONCOPYABLE(ScrollManager); |
38 | 38 |
39 public: | 39 public: |
40 explicit ScrollManager(LocalFrame&); | 40 explicit ScrollManager(LocalFrame&); |
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68 Node* startingNode, | 68 Node* startingNode, |
69 Node* mousePressNode); | 69 Node* mousePressNode); |
70 | 70 |
71 void setFrameWasScrolledByUser(); | 71 void setFrameWasScrolledByUser(); |
72 | 72 |
73 // TODO(crbug.com/616491): Consider moving all gesture related functions to | 73 // TODO(crbug.com/616491): Consider moving all gesture related functions to |
74 // another class. | 74 // another class. |
75 | 75 |
76 // Handle the provided scroll gesture event, propagating down to child frames | 76 // Handle the provided scroll gesture event, propagating down to child frames |
77 // as necessary. | 77 // as necessary. |
78 WebInputEventResult handleGestureScrollEvent(const PlatformGestureEvent&); | 78 WebInputEventResult handleGestureScrollEvent(const WebGestureEvent&); |
79 | 79 |
80 WebInputEventResult handleGestureScrollEnd(const PlatformGestureEvent&); | 80 WebInputEventResult handleGestureScrollEnd(const WebGestureEvent&); |
81 | 81 |
82 bool isScrollbarHandlingGestures() const; | 82 bool isScrollbarHandlingGestures() const; |
83 | 83 |
84 // Returns true if the gesture event should be handled in ScrollManager. | 84 // Returns true if the gesture event should be handled in ScrollManager. |
85 bool canHandleGestureEvent(const GestureEventWithHitTestResults&); | 85 bool canHandleGestureEvent(const GestureEventWithHitTestResults&); |
86 | 86 |
87 // These functions are related to |m_resizeScrollableArea|. | 87 // These functions are related to |m_resizeScrollableArea|. |
88 bool inResizeMode() const; | 88 bool inResizeMode() const; |
89 void resize(const PlatformEvent&); | 89 void resize(const PlatformMouseEvent&); |
90 // Clears |m_resizeScrollableArea|. if |shouldNotBeNull| is true this | 90 // Clears |m_resizeScrollableArea|. if |shouldNotBeNull| is true this |
91 // function DCHECKs to make sure that variable is indeed not null. | 91 // function DCHECKs to make sure that variable is indeed not null. |
92 void clearResizeScrollableArea(bool shouldNotBeNull); | 92 void clearResizeScrollableArea(bool shouldNotBeNull); |
93 void setResizeScrollableArea(PaintLayer*, IntPoint); | 93 void setResizeScrollableArea(PaintLayer*, IntPoint); |
94 | 94 |
95 private: | 95 private: |
96 WebInputEventResult handleGestureScrollUpdate(const PlatformGestureEvent&); | 96 WebInputEventResult handleGestureScrollUpdate(const WebGestureEvent&); |
97 WebInputEventResult handleGestureScrollBegin(const PlatformGestureEvent&); | 97 WebInputEventResult handleGestureScrollBegin(const WebGestureEvent&); |
98 | 98 |
99 WebInputEventResult passScrollGestureEventToWidget( | 99 WebInputEventResult passScrollGestureEventToWidget(const WebGestureEvent&, |
100 const PlatformGestureEvent&, | 100 LayoutObject*); |
101 LayoutObject*); | |
102 | 101 |
103 void clearGestureScrollState(); | 102 void clearGestureScrollState(); |
104 | 103 |
105 void customizedScroll(const Node& startNode, ScrollState&); | 104 void customizedScroll(const Node& startNode, ScrollState&); |
106 | 105 |
107 FrameHost* frameHost() const; | 106 FrameHost* frameHost() const; |
108 | 107 |
109 bool isViewportScrollingElement(const Element&) const; | 108 bool isViewportScrollingElement(const Element&) const; |
110 | 109 |
111 bool handleScrollGestureOnResizer(Node*, const PlatformGestureEvent&); | 110 bool handleScrollGestureOnResizer(Node*, const WebGestureEvent&); |
112 | 111 |
113 void recomputeScrollChain(const Node& startNode, | 112 void recomputeScrollChain(const Node& startNode, |
114 std::deque<int>& scrollChain); | 113 std::deque<int>& scrollChain); |
115 | 114 |
116 // NOTE: If adding a new field to this class please ensure that it is | 115 // NOTE: If adding a new field to this class please ensure that it is |
117 // cleared in |ScrollManager::clear()|. | 116 // cleared in |ScrollManager::clear()|. |
118 | 117 |
119 const Member<LocalFrame> m_frame; | 118 const Member<LocalFrame> m_frame; |
120 | 119 |
121 // Only used with the ScrollCustomization runtime enabled feature. | 120 // Only used with the ScrollCustomization runtime enabled feature. |
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142 | 141 |
143 Member<PaintLayerScrollableArea> m_resizeScrollableArea; | 142 Member<PaintLayerScrollableArea> m_resizeScrollableArea; |
144 | 143 |
145 LayoutSize | 144 LayoutSize |
146 m_offsetFromResizeCorner; // In the coords of m_resizeScrollableArea. | 145 m_offsetFromResizeCorner; // In the coords of m_resizeScrollableArea. |
147 }; | 146 }; |
148 | 147 |
149 } // namespace blink | 148 } // namespace blink |
150 | 149 |
151 #endif // ScrollManager_h | 150 #endif // ScrollManager_h |
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