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
33namespace WebCore {
34
35class SuspendableTimer : public TimerBase, public ActiveDOMObject {
36public:
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
47private:
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