1 | /* |
2 | * Copyright (C) 2014 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. ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #pragma once |
27 | |
28 | #include <wtf/RefPtr.h> |
29 | |
30 | namespace WebCore { |
31 | |
32 | class ContainerNode; |
33 | class Element; |
34 | class Frame; |
35 | |
36 | class ScrollLatchingState final { |
37 | public: |
38 | ScrollLatchingState(); |
39 | ~ScrollLatchingState(); |
40 | |
41 | void clear(); |
42 | |
43 | Element* wheelEventElement() { return m_wheelEventElement.get(); } |
44 | void setWheelEventElement(Element*); |
45 | Frame* frame() { return m_frame; } |
46 | void setFrame(Frame* frame) { m_frame = frame; } |
47 | |
48 | bool widgetIsLatched() const { return m_widgetIsLatched; } |
49 | void setWidgetIsLatched(bool isOverWidget); |
50 | |
51 | Element* previousWheelScrolledElement() { return m_previousWheelScrolledElement.get(); } |
52 | void setPreviousWheelScrolledElement(Element*); |
53 | |
54 | ContainerNode* scrollableContainer() { return m_scrollableContainer.get(); } |
55 | void setScrollableContainer(ContainerNode*); |
56 | bool startedGestureAtScrollLimit() const { return m_startedGestureAtScrollLimit; } |
57 | void setStartedGestureAtScrollLimit(bool startedAtLimit) { m_startedGestureAtScrollLimit = startedAtLimit; } |
58 | |
59 | private: |
60 | RefPtr<Element> m_wheelEventElement; |
61 | RefPtr<Element> m_previousWheelScrolledElement; |
62 | RefPtr<ContainerNode> m_scrollableContainer; |
63 | |
64 | Frame* m_frame { nullptr }; |
65 | |
66 | bool m_widgetIsLatched { false }; |
67 | bool m_startedGestureAtScrollLimit { false }; |
68 | }; |
69 | |
70 | } // namespace WebCore |
71 | |