1 /*
2 * Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
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 COMPUTER, 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 COMPUTER, 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 #include "config.h"
27
28 #include "core/events/GenericEventQueue.h"
29
30 #include "core/events/Event.h"
31 #include "platform/TraceEvent.h"
32
33 namespace WebCore {
34
create(EventTarget * owner)35 PassOwnPtr<GenericEventQueue> GenericEventQueue::create(EventTarget* owner)
36 {
37 return adoptPtr(new GenericEventQueue(owner));
38 }
39
GenericEventQueue(EventTarget * owner)40 GenericEventQueue::GenericEventQueue(EventTarget* owner)
41 : m_owner(owner)
42 , m_timer(this, &GenericEventQueue::timerFired)
43 , m_isClosed(false)
44 {
45 }
46
~GenericEventQueue()47 GenericEventQueue::~GenericEventQueue()
48 {
49 }
50
enqueueEvent(PassRefPtr<Event> event)51 bool GenericEventQueue::enqueueEvent(PassRefPtr<Event> event)
52 {
53 if (m_isClosed)
54 return false;
55
56 if (event->target() == m_owner)
57 event->setTarget(0);
58
59 TRACE_EVENT_ASYNC_BEGIN1("event", "GenericEventQueue:enqueueEvent", event.get(), "type", event->type().string().ascii());
60 m_pendingEvents.append(event);
61
62 if (!m_timer.isActive())
63 m_timer.startOneShot(0);
64
65 return true;
66 }
67
cancelEvent(Event * event)68 bool GenericEventQueue::cancelEvent(Event* event)
69 {
70 bool found = m_pendingEvents.contains(event);
71
72 if (found) {
73 m_pendingEvents.remove(m_pendingEvents.find(event));
74 TRACE_EVENT_ASYNC_END2("event", "GenericEventQueue:enqueueEvent", event, "type", event->type().string().ascii(), "status", "cancelled");
75 }
76
77 if (m_pendingEvents.isEmpty())
78 m_timer.stop();
79
80 return found;
81 }
82
timerFired(Timer<GenericEventQueue> *)83 void GenericEventQueue::timerFired(Timer<GenericEventQueue>*)
84 {
85 ASSERT(!m_timer.isActive());
86 ASSERT(!m_pendingEvents.isEmpty());
87
88 Vector<RefPtr<Event> > pendingEvents;
89 m_pendingEvents.swap(pendingEvents);
90
91 RefPtr<EventTarget> protect(m_owner);
92 for (size_t i = 0; i < pendingEvents.size(); ++i) {
93 Event* event = pendingEvents[i].get();
94 EventTarget* target = event->target() ? event->target() : m_owner;
95 CString type(event->type().string().ascii());
96 TRACE_EVENT_ASYNC_STEP_INTO1("event", "GenericEventQueue:enqueueEvent", event, "dispatch", "type", type);
97 target->dispatchEvent(pendingEvents[i].release());
98 TRACE_EVENT_ASYNC_END1("event", "GenericEventQueue:enqueueEvent", event, "type", type);
99 }
100 }
101
close()102 void GenericEventQueue::close()
103 {
104 m_isClosed = true;
105 cancelAllEvents();
106 }
107
cancelAllEvents()108 void GenericEventQueue::cancelAllEvents()
109 {
110 m_timer.stop();
111
112 for (size_t i = 0; i < m_pendingEvents.size(); ++i) {
113 Event* event = m_pendingEvents[i].get();
114 TRACE_EVENT_ASYNC_END2("event", "GenericEventQueue:enqueueEvent", event, "type", event->type().string().ascii(), "status", "cancelled");
115 }
116 m_pendingEvents.clear();
117 }
118
hasPendingEvents() const119 bool GenericEventQueue::hasPendingEvents() const
120 {
121 return m_pendingEvents.size();
122 }
123
124 }
125