1 /*
2  * Copyright (C) 2008 Apple 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  * 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 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 
27 #ifndef SuspendableTimer_h
28 #define SuspendableTimer_h
29 
30 #include "ActiveDOMObject.h"
31 #include "Timer.h"
32 
33 namespace WebCore {
34 
35 class SuspendableTimer : public TimerBase, public ActiveDOMObject {
36 public:
37     explicit SuspendableTimer(ScriptExecutionContext*);
38     virtual ~SuspendableTimer();
39 
40     // ActiveDOMObject
41     virtual bool hasPendingActivity() const;
42     virtual void stop();
43     virtual bool canSuspend() const;
44     virtual void suspend(ReasonForSuspension);
45     virtual void resume();
46 
47 private:
48     virtual void fired() = 0;
49 
50     double m_nextFireInterval;
51     double m_repeatInterval;
52     bool m_active;
53 #if !ASSERT_DISABLED
54     bool m_suspended;
55 #endif
56 };
57 
58 } // namespace WebCore
59 
60 #endif // SuspendableTimer_h
61 
62