1/*
2 * Copyright (C) 2010 Google Inc. All Rights Reserved.
3 * Copyright (C) 2013 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 "Event.h"
31#include "EventQueue.h"
32#include <memory>
33#include <wtf/HashSet.h>
34#include <wtf/ListHashSet.h>
35
36namespace WebCore {
37
38class Document;
39class Node;
40
41class DocumentEventQueue final : public EventQueue {
42public:
43 explicit DocumentEventQueue(Document&);
44 virtual ~DocumentEventQueue();
45
46 bool enqueueEvent(Ref<Event>&&) override;
47 bool cancelEvent(Event&) override;
48 void close() override;
49
50 void enqueueOrDispatchScrollEvent(Node&);
51 void enqueueScrollEvent(EventTarget&, Event::CanBubble, Event::IsCancelable);
52 void enqueueResizeEvent(EventTarget&, Event::CanBubble, Event::IsCancelable);
53
54private:
55 void pendingEventTimerFired();
56 void dispatchEvent(Event&);
57
58 class Timer;
59
60 Document& m_document;
61 std::unique_ptr<Timer> m_pendingEventTimer;
62 ListHashSet<RefPtr<Event>> m_queuedEvents;
63 HashSet<EventTarget*> m_targetsWithQueuedScrollEvents;
64 HashSet<EventTarget*> m_targetsWithQueuedResizeEvents;
65 bool m_isClosed;
66};
67
68} // namespace WebCore
69