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
33 namespace WebCore {
34
35 class EventFrameAction : public FrameAction {
36 public:
EventFrameAction(PassRefPtr<Event> event,PassRefPtr<Node> target)37 EventFrameAction(PassRefPtr<Event> event, PassRefPtr<Node> target)
38 : m_event(event)
39 , m_eventTarget(target)
40 {
41 }
42
fire()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
51 private:
52 RefPtr<Event> m_event;
53 RefPtr<Node> m_eventTarget;
54 };
55
FrameActionScheduler()56 FrameActionScheduler::FrameActionScheduler()
57 : m_enqueueActions(0)
58 {
59 }
60
~FrameActionScheduler()61 FrameActionScheduler::~FrameActionScheduler()
62 {
63 clear();
64 }
65
isEmpty() const66 bool FrameActionScheduler::isEmpty() const
67 {
68 return m_scheduledActions.isEmpty();
69 }
70
clear()71 void FrameActionScheduler::clear()
72 {
73 m_scheduledActions.clear();
74 m_enqueueActions = 0;
75 }
76
pause()77 void FrameActionScheduler::pause()
78 {
79 ASSERT(isEmpty() || m_enqueueActions);
80 m_enqueueActions++;
81 }
82
resume()83 void FrameActionScheduler::resume()
84 {
85 m_enqueueActions--;
86 if (!m_enqueueActions)
87 dispatch();
88 ASSERT(isEmpty() || m_enqueueActions);
89 }
90
dispatch()91 void 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
scheduleAction(PassOwnPtr<FrameAction> action)100 void FrameActionScheduler::scheduleAction(PassOwnPtr<FrameAction> action)
101 {
102 m_scheduledActions.append(action);
103 }
104
scheduleEvent(PassRefPtr<Event> event,PassRefPtr<Node> eventTarget)105 void FrameActionScheduler::scheduleEvent(PassRefPtr<Event> event, PassRefPtr<Node> eventTarget)
106 {
107 scheduleAction(new EventFrameAction(event, eventTarget));
108 }
109
110
111 } // namespace WebCore
112