1/*
2 * Copyright (C) 2010 Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "ScopedEventQueue.h"
33
34#include "Event.h"
35#include "Node.h"
36#include <wtf/NeverDestroyed.h>
37
38namespace WebCore {
39
40ScopedEventQueue& ScopedEventQueue::singleton()
41{
42 static NeverDestroyed<ScopedEventQueue> scopedEventQueue;
43 return scopedEventQueue;
44}
45
46void ScopedEventQueue::enqueueEvent(Ref<Event>&& event)
47{
48 ASSERT(is<Node>(event->target()));
49 if (m_scopingLevel)
50 m_queuedEvents.append(WTFMove(event));
51 else
52 dispatchEvent(event);
53}
54
55void ScopedEventQueue::dispatchEvent(Event& event) const
56{
57 downcast<Node>(*event.target()).dispatchEvent(event);
58}
59
60void ScopedEventQueue::dispatchAllEvents()
61{
62 Vector<Ref<Event>> queuedEvents = WTFMove(m_queuedEvents);
63 for (auto& queuedEvent : queuedEvents)
64 dispatchEvent(queuedEvent);
65}
66
67void ScopedEventQueue::incrementScopingLevel()
68{
69 ++m_scopingLevel;
70}
71
72void ScopedEventQueue::decrementScopingLevel()
73{
74 ASSERT(m_scopingLevel);
75 --m_scopingLevel;
76 if (!m_scopingLevel)
77 dispatchAllEvents();
78}
79
80}
81