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/*
* Copyright (C) 2008, 2013 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "config.h"
#include "SuspendableTimer.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
SuspendableTimerBase::SuspendableTimerBase(ScriptExecutionContext* context)
: ActiveDOMObject(context)
{
}
SuspendableTimerBase::~SuspendableTimerBase() = default;
bool SuspendableTimerBase::virtualHasPendingActivity() const
{
return isActive();
}
void SuspendableTimerBase::stop()
{
if (!m_suspended)
TimerBase::stop();
// Make it less likely that SuspendableTimer is accidentally revived and fires after being stopped.
// It is not allowed for an ActiveDOMObject to become active again after stop().
m_suspended = true;
m_savedIsActive = false;
didStop();
}
void SuspendableTimerBase::suspend(ReasonForSuspension)
{
ASSERT(!m_suspended);
m_suspended = true;
m_savedIsActive = TimerBase::isActive();
if (m_savedIsActive) {
m_savedNextFireInterval = TimerBase::nextUnalignedFireInterval();
m_savedRepeatInterval = TimerBase::repeatInterval();
TimerBase::stop();
}
}
void SuspendableTimerBase::resume()
{
ASSERT(m_suspended);
m_suspended = false;
if (m_savedIsActive)
start(m_savedNextFireInterval, m_savedRepeatInterval);
}
void SuspendableTimerBase::didStop()
{
}
void SuspendableTimerBase::cancel()
{
if (!m_suspended)
TimerBase::stop();
else
m_suspended = false;
}
void SuspendableTimerBase::startRepeating(Seconds nextFireInterval, Seconds repeatInterval)
{
if (!m_suspended)
TimerBase::start(nextFireInterval, repeatInterval);
else {
m_savedIsActive = true;
m_savedNextFireInterval = nextFireInterval;
m_savedRepeatInterval = repeatInterval;
}
}
void SuspendableTimerBase::startOneShot(Seconds interval)
{
if (!m_suspended)
TimerBase::startOneShot(interval);
else {
m_savedIsActive = true;
m_savedNextFireInterval = interval;
m_savedRepeatInterval = 0_s;
}
}
Seconds SuspendableTimerBase::repeatInterval() const
{
if (!m_suspended)
return TimerBase::repeatInterval();
if (m_savedIsActive)
return m_savedRepeatInterval;
return 0_s;
}
void SuspendableTimerBase::augmentFireInterval(Seconds delta)
{
if (!m_suspended)
TimerBase::augmentFireInterval(delta);
else if (m_savedIsActive) {
m_savedNextFireInterval += delta;
} else {
m_savedIsActive = true;
m_savedNextFireInterval = delta;
m_savedRepeatInterval = 0_s;
}
}
void SuspendableTimerBase::augmentRepeatInterval(Seconds delta)
{
if (!m_suspended)
TimerBase::augmentRepeatInterval(delta);
else if (m_savedIsActive) {
m_savedNextFireInterval += delta;
m_savedRepeatInterval += delta;
} else {
m_savedIsActive = true;
m_savedNextFireInterval = delta;
m_savedRepeatInterval = delta;
}
}
} // namespace WebCore
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