1/*
2 * Copyright (C) 2001 Peter Kelly (pmk@post.com)
3 * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
4 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
5 * Copyright (C) 2003-2017 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#include "config.h"
24#include "Event.h"
25
26#include "DOMWindow.h"
27#include "Document.h"
28#include "EventNames.h"
29#include "EventPath.h"
30#include "EventTarget.h"
31#include "InspectorInstrumentation.h"
32#include "Performance.h"
33#include "UserGestureIndicator.h"
34#include "WorkerGlobalScope.h"
35
36namespace WebCore {
37
38ALWAYS_INLINE Event::Event(MonotonicTime createTime, const AtomicString& type, IsTrusted isTrusted, CanBubble canBubble, IsCancelable cancelable, IsComposed composed)
39 : m_isInitialized { !type.isNull() }
40 , m_canBubble { canBubble == CanBubble::Yes }
41 , m_cancelable { cancelable == IsCancelable::Yes }
42 , m_composed { composed == IsComposed::Yes }
43 , m_propagationStopped { false }
44 , m_immediatePropagationStopped { false }
45 , m_wasCanceled { false }
46 , m_defaultHandled { false }
47 , m_isDefaultEventHandlerIgnored { false }
48 , m_isTrusted { isTrusted == IsTrusted::Yes }
49 , m_isExecutingPassiveEventListener { false }
50 , m_eventPhase { NONE }
51 , m_type { type }
52 , m_createTime { createTime }
53{
54}
55
56Event::Event(IsTrusted isTrusted)
57 : Event { MonotonicTime::now(), { }, isTrusted, CanBubble::No, IsCancelable::No, IsComposed::No }
58{
59}
60
61Event::Event(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed)
62 : Event { MonotonicTime::now(), eventType, IsTrusted::Yes, canBubble, isCancelable, isComposed }
63{
64 ASSERT(!eventType.isNull());
65}
66
67Event::Event(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, IsTrusted isTrusted)
68 : Event { timestamp, eventType, isTrusted, canBubble, isCancelable, isComposed }
69{
70 ASSERT(!eventType.isNull());
71}
72
73Event::Event(const AtomicString& eventType, const EventInit& initializer, IsTrusted isTrusted)
74 : Event { MonotonicTime::now(), eventType, isTrusted,
75 initializer.bubbles ? CanBubble::Yes : CanBubble::No,
76 initializer.cancelable ? IsCancelable::Yes : IsCancelable::No,
77 initializer.composed ? IsComposed::Yes : IsComposed::No }
78{
79 ASSERT(!eventType.isNull());
80}
81
82Event::~Event() = default;
83
84Ref<Event> Event::create(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed)
85{
86 return adoptRef(*new Event(type, canBubble, isCancelable, isComposed));
87}
88
89Ref<Event> Event::createForBindings()
90{
91 return adoptRef(*new Event);
92}
93
94Ref<Event> Event::create(const AtomicString& type, const EventInit& initializer, IsTrusted isTrusted)
95{
96 return adoptRef(*new Event(type, initializer, isTrusted));
97}
98
99void Event::initEvent(const AtomicString& eventTypeArg, bool canBubbleArg, bool cancelableArg)
100{
101 if (isBeingDispatched())
102 return;
103
104 m_isInitialized = true;
105 m_propagationStopped = false;
106 m_immediatePropagationStopped = false;
107 m_wasCanceled = false;
108 m_isTrusted = false;
109 m_target = nullptr;
110 m_type = eventTypeArg;
111 m_canBubble = canBubbleArg;
112 m_cancelable = cancelableArg;
113
114 m_underlyingEvent = nullptr;
115}
116
117void Event::setTarget(RefPtr<EventTarget>&& target)
118{
119 if (m_target == target)
120 return;
121
122 m_target = WTFMove(target);
123 if (m_target)
124 receivedTarget();
125}
126
127void Event::setCurrentTarget(EventTarget* currentTarget)
128{
129 m_currentTarget = currentTarget;
130}
131
132Vector<EventTarget*> Event::composedPath() const
133{
134 if (!m_eventPath)
135 return Vector<EventTarget*>();
136 return m_eventPath->computePathUnclosedToTarget(*m_currentTarget);
137}
138
139void Event::setUnderlyingEvent(Event* underlyingEvent)
140{
141 // Prohibit creation of a cycle by doing nothing if a cycle would be created.
142 for (Event* event = underlyingEvent; event; event = event->underlyingEvent()) {
143 if (event == this)
144 return;
145 }
146 m_underlyingEvent = underlyingEvent;
147}
148
149DOMHighResTimeStamp Event::timeStampForBindings(ScriptExecutionContext& context) const
150{
151 Performance* performance = nullptr;
152 if (is<WorkerGlobalScope>(context))
153 performance = &downcast<WorkerGlobalScope>(context).performance();
154 else if (auto* window = downcast<Document>(context).domWindow())
155 performance = &window->performance();
156
157 if (!performance)
158 return 0;
159
160 return std::max(performance->relativeTimeFromTimeOriginInReducedResolution(m_createTime), 0.);
161}
162
163void Event::resetBeforeDispatch()
164{
165 m_defaultHandled = false;
166}
167
168void Event::resetAfterDispatch()
169{
170 m_eventPath = nullptr;
171 m_currentTarget = nullptr;
172 m_eventPhase = NONE;
173 m_propagationStopped = false;
174 m_immediatePropagationStopped = false;
175
176 InspectorInstrumentation::eventDidResetAfterDispatch(*this);
177}
178
179} // namespace WebCore
180