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      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 #include "config.h"
     28 #include "SuspendableTimer.h"
     29 
     30 #include "ScriptExecutionContext.h"
     31 
     32 namespace WebCore {
     33 
     34 SuspendableTimer::SuspendableTimer(ScriptExecutionContext* context)
     35     : ActiveDOMObject(context, this)
     36     , m_nextFireInterval(0)
     37     , m_repeatInterval(0)
     38 #if !ASSERT_DISABLED
     39     , m_active(false)
     40     , m_suspended(false)
     41 #endif
     42 {
     43 }
     44 
     45 SuspendableTimer::~SuspendableTimer()
     46 {
     47 }
     48 
     49 bool SuspendableTimer::hasPendingActivity() const
     50 {
     51     return isActive();
     52 }
     53 
     54 void SuspendableTimer::stop()
     55 {
     56     TimerBase::stop();
     57 }
     58 
     59 void SuspendableTimer::suspend(ReasonForSuspension)
     60 {
     61 #if !ASSERT_DISABLED
     62     ASSERT(!m_suspended);
     63     m_suspended = true;
     64 #endif
     65     m_active = isActive();
     66     if (m_active) {
     67         m_nextFireInterval = nextFireInterval();
     68         m_repeatInterval = repeatInterval();
     69         TimerBase::stop();
     70     }
     71 }
     72 
     73 void SuspendableTimer::resume()
     74 {
     75 #if !ASSERT_DISABLED
     76     ASSERT(m_suspended);
     77     m_suspended = false;
     78 #endif
     79     if (m_active)
     80         start(m_nextFireInterval, m_repeatInterval);
     81 }
     82 
     83 bool SuspendableTimer::canSuspend() const
     84 {
     85     return true;
     86 }
     87 
     88 } // namespace WebCore
     89