1/*
2 * Copyright (C) 2011 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
6 * are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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#include "FrameActionScheduler.h"
28
29#include "Event.h"
30#include "Node.h"
31#include <wtf/Vector.h>
32
33namespace WebCore {
34
35class EventFrameAction : public FrameAction {
36public:
37 EventFrameAction(PassRefPtr<Event> event, PassRefPtr<Node> target)
38 : m_event(event)
39 , m_eventTarget(target)
40 {
41 }
42
43 virtual void fire()
44 {
45 // Only dispatch events to nodes that are in the document
46 ExceptionCode ec = 0;
47 if (m_eventTarget->inDocument())
48 m_eventTarget->dispatchEvent(m_event, ec);
49 }
50
51private:
52 RefPtr<Event> m_event;
53 RefPtr<Node> m_eventTarget;
54};
55
56FrameActionScheduler::FrameActionScheduler()
57 : m_enqueueActions(0)
58{
59}
60
61FrameActionScheduler::~FrameActionScheduler()
62{
63 clear();
64}
65
66bool FrameActionScheduler::isEmpty() const
67{
68 return m_scheduledActions.isEmpty();
69}
70
71void FrameActionScheduler::clear()
72{
73 m_scheduledActions.clear();
74 m_enqueueActions = 0;
75}
76
77void FrameActionScheduler::pause()
78{
79 ASSERT(isEmpty() || m_enqueueActions);
80 m_enqueueActions++;
81}
82
83void FrameActionScheduler::resume()
84{
85 m_enqueueActions--;
86 if (!m_enqueueActions)
87 dispatch();
88 ASSERT(isEmpty() || m_enqueueActions);
89}
90
91void FrameActionScheduler::dispatch()
92{
93 Vector< OwnPtr<FrameAction> > snapshot;
94 m_scheduledActions.swap(snapshot);
95
96 for (Vector< OwnPtr<FrameAction> >::iterator i = snapshot.begin(); i != snapshot.end(); ++i)
97 (*i)->fire();
98}
99
100void FrameActionScheduler::scheduleAction(PassOwnPtr<FrameAction> action)
101{
102 m_scheduledActions.append(action);
103}
104
105void FrameActionScheduler::scheduleEvent(PassRefPtr<Event> event, PassRefPtr<Node> eventTarget)
106{
107 scheduleAction(new EventFrameAction(event, eventTarget));
108}
109
110
111} // namespace WebCore