1 | /* |
2 | * Copyright (C) 2010 Google Inc. All Rights Reserved. |
3 | * Copyright (C) 2017 Apple Inc. All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
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 INC. ``AS IS'' AND ANY |
15 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
17 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
18 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
19 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
20 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
21 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
22 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
24 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
25 | * |
26 | */ |
27 | |
28 | #pragma once |
29 | |
30 | #include "Node.h" |
31 | |
32 | namespace WebCore { |
33 | |
34 | class TouchList; |
35 | |
36 | class EventContext { |
37 | WTF_MAKE_FAST_ALLOCATED; |
38 | public: |
39 | using EventInvokePhase = EventTarget::EventInvokePhase; |
40 | |
41 | EventContext(Node*, EventTarget* currentTarget, EventTarget*, int closedShadowDepth); |
42 | virtual ~EventContext(); |
43 | |
44 | Node* node() const { return m_node.get(); } |
45 | EventTarget* currentTarget() const { return m_currentTarget.get(); } |
46 | EventTarget* target() const { return m_target.get(); } |
47 | int closedShadowDepth() const { return m_closedShadowDepth; } |
48 | |
49 | virtual void handleLocalEvents(Event&, EventInvokePhase) const; |
50 | |
51 | virtual bool isMouseOrFocusEventContext() const; |
52 | virtual bool isTouchEventContext() const; |
53 | |
54 | protected: |
55 | #if !ASSERT_DISABLED |
56 | bool isUnreachableNode(EventTarget*) const; |
57 | #endif |
58 | |
59 | RefPtr<Node> m_node; |
60 | RefPtr<EventTarget> m_currentTarget; |
61 | RefPtr<EventTarget> m_target; |
62 | int m_closedShadowDepth { 0 }; |
63 | }; |
64 | |
65 | class MouseOrFocusEventContext final : public EventContext { |
66 | public: |
67 | MouseOrFocusEventContext(Node&, EventTarget* currentTarget, EventTarget*, int closedShadowDepth); |
68 | virtual ~MouseOrFocusEventContext(); |
69 | |
70 | Node* relatedTarget() const { return m_relatedTarget.get(); } |
71 | void setRelatedTarget(Node*); |
72 | |
73 | private: |
74 | void handleLocalEvents(Event&, EventInvokePhase) const final; |
75 | bool isMouseOrFocusEventContext() const final; |
76 | |
77 | RefPtr<Node> m_relatedTarget; |
78 | }; |
79 | |
80 | #if ENABLE(TOUCH_EVENTS) |
81 | |
82 | class TouchEventContext final : public EventContext { |
83 | public: |
84 | TouchEventContext(Node&, EventTarget* currentTarget, EventTarget*, int closedShadowDepth); |
85 | virtual ~TouchEventContext(); |
86 | |
87 | enum TouchListType { Touches, TargetTouches, ChangedTouches }; |
88 | TouchList& touchList(TouchListType); |
89 | |
90 | private: |
91 | void handleLocalEvents(Event&, EventInvokePhase) const final; |
92 | bool isTouchEventContext() const final; |
93 | |
94 | void checkReachability(const Ref<TouchList>&) const; |
95 | |
96 | Ref<TouchList> m_touches; |
97 | Ref<TouchList> m_targetTouches; |
98 | Ref<TouchList> m_changedTouches; |
99 | }; |
100 | |
101 | #endif // ENABLE(TOUCH_EVENTS) |
102 | |
103 | #if !ASSERT_DISABLED |
104 | |
105 | inline bool EventContext::isUnreachableNode(EventTarget* target) const |
106 | { |
107 | // FIXME: Checks also for SVG elements. |
108 | return is<Node>(target) && !downcast<Node>(*target).isSVGElement() && m_node->isClosedShadowHidden(downcast<Node>(*target)); |
109 | } |
110 | |
111 | #endif |
112 | |
113 | inline void MouseOrFocusEventContext::setRelatedTarget(Node* relatedTarget) |
114 | { |
115 | ASSERT(!isUnreachableNode(relatedTarget)); |
116 | m_relatedTarget = relatedTarget; |
117 | } |
118 | |
119 | #if ENABLE(TOUCH_EVENTS) |
120 | |
121 | inline TouchList& TouchEventContext::touchList(TouchListType type) |
122 | { |
123 | switch (type) { |
124 | case Touches: |
125 | return m_touches.get(); |
126 | case TargetTouches: |
127 | return m_targetTouches.get(); |
128 | case ChangedTouches: |
129 | return m_changedTouches.get(); |
130 | } |
131 | ASSERT_NOT_REACHED(); |
132 | return m_touches.get(); |
133 | } |
134 | |
135 | #endif |
136 | |
137 | #if ENABLE(TOUCH_EVENTS) && ASSERT_DISABLED |
138 | |
139 | inline void TouchEventContext::checkReachability(const Ref<TouchList>&) const |
140 | { |
141 | } |
142 | |
143 | #endif |
144 | |
145 | } // namespace WebCore |
146 | |
147 | SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::MouseOrFocusEventContext) |
148 | static bool isType(const WebCore::EventContext& context) { return context.isMouseOrFocusEventContext(); } |
149 | SPECIALIZE_TYPE_TRAITS_END() |
150 | |
151 | #if ENABLE(TOUCH_EVENTS) |
152 | SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::TouchEventContext) |
153 | static bool isType(const WebCore::EventContext& context) { return context.isTouchEventContext(); } |
154 | SPECIALIZE_TYPE_TRAITS_END() |
155 | #endif |
156 | |