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/*
* Copyright (C) 2013 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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.
*/
#ifndef AnimationClock_h
#define AnimationClock_h
#include "wtf/CurrentTime.h"
#include "wtf/PassOwnPtr.h"
namespace WebCore {
class AnimationClock {
public:
static PassOwnPtr<AnimationClock> create(WTF::TimeFunction monotonicallyIncreasingTime = WTF::monotonicallyIncreasingTime)
{
return adoptPtr(new AnimationClock(monotonicallyIncreasingTime));
}
void updateTime(double time)
{
if (time > m_time)
m_time = time;
m_frozen = true;
}
double currentTime()
{
if (!m_frozen)
updateTime(m_monotonicallyIncreasingTime());
return m_time;
}
void unfreeze() { m_frozen = false; }
void resetTimeForTesting() { m_time = 0; m_frozen = true; }
private:
AnimationClock(WTF::TimeFunction monotonicallyIncreasingTime)
: m_monotonicallyIncreasingTime(monotonicallyIncreasingTime)
, m_time(0)
, m_frozen(false)
{
}
WTF::TimeFunction m_monotonicallyIncreasingTime;
double m_time;
bool m_frozen;
};
} // namespace WebCore
#endif // AnimationClock_h
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