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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.
*/
#include "config.h"
#include "core/animation/TimedItem.h"
#include "core/animation/Player.h"
#include "core/animation/TimedItemCalculations.h"
namespace WebCore {
TimedItem::TimedItem(const Timing& timing, PassOwnPtr<EventDelegate> eventDelegate)
: m_parent(0)
, m_startTime(0)
, m_player(0)
, m_specified(timing)
, m_eventDelegate(eventDelegate)
, m_calculated()
, m_isFirstSample(true)
, m_needsUpdate(true)
, m_lastUpdateTime(nullValue())
{
m_specified.assertValid();
}
bool TimedItem::updateInheritedTime(double inheritedTime) const
{
bool needsUpdate = m_needsUpdate || (m_lastUpdateTime != inheritedTime && !(isNull(m_lastUpdateTime) && isNull(inheritedTime)));
m_needsUpdate = false;
m_lastUpdateTime = inheritedTime;
const double previousIteration = m_calculated.currentIteration;
const Phase previousPhase = m_calculated.phase;
const double localTime = inheritedTime - m_startTime;
double timeToNextIteration = std::numeric_limits<double>::infinity();
if (needsUpdate) {
const double iterationDuration = m_specified.hasIterationDuration
? m_specified.iterationDuration
: intrinsicIterationDuration();
ASSERT(iterationDuration >= 0);
// When iterationDuration = 0 and iterationCount = infinity, or vice-
// versa, repeatedDuration should be 0, not NaN as operator*() would give.
// FIXME: The spec is unclear about this.
const double repeatedDuration = multiplyZeroAlwaysGivesZero(iterationDuration, m_specified.iterationCount);
ASSERT(repeatedDuration >= 0);
const double activeDuration = m_specified.playbackRate
? repeatedDuration / abs(m_specified.playbackRate)
: std::numeric_limits<double>::infinity();
ASSERT(activeDuration >= 0);
const Phase currentPhase = calculatePhase(activeDuration, localTime, m_specified);
// FIXME: parentPhase depends on groups being implemented.
const TimedItem::Phase parentPhase = TimedItem::PhaseActive;
const double activeTime = calculateActiveTime(activeDuration, localTime, parentPhase, currentPhase, m_specified);
double currentIteration;
double timeFraction;
if (iterationDuration) {
const double startOffset = multiplyZeroAlwaysGivesZero(m_specified.iterationStart, iterationDuration);
ASSERT(startOffset >= 0);
const double scaledActiveTime = calculateScaledActiveTime(activeDuration, activeTime, startOffset, m_specified);
const double iterationTime = calculateIterationTime(iterationDuration, repeatedDuration, scaledActiveTime, startOffset, m_specified);
currentIteration = calculateCurrentIteration(iterationDuration, iterationTime, scaledActiveTime, m_specified);
timeFraction = calculateTransformedTime(currentIteration, iterationDuration, iterationTime, m_specified) / iterationDuration;
if (!isNull(iterationTime)) {
timeToNextIteration = (iterationDuration - iterationTime) / abs(m_specified.playbackRate);
if (activeDuration - activeTime < timeToNextIteration)
timeToNextIteration = std::numeric_limits<double>::infinity();
}
} else {
const double localIterationDuration = 1;
const double localRepeatedDuration = localIterationDuration * m_specified.iterationCount;
ASSERT(localRepeatedDuration >= 0);
const double localActiveDuration = m_specified.playbackRate ? localRepeatedDuration / abs(m_specified.playbackRate) : std::numeric_limits<double>::infinity();
ASSERT(localActiveDuration >= 0);
const double localLocalTime = localTime < m_specified.startDelay ? localTime : localActiveDuration + m_specified.startDelay;
const TimedItem::Phase localCurrentPhase = calculatePhase(localActiveDuration, localLocalTime, m_specified);
const double localActiveTime = calculateActiveTime(localActiveDuration, localLocalTime, parentPhase, localCurrentPhase, m_specified);
const double startOffset = m_specified.iterationStart * localIterationDuration;
ASSERT(startOffset >= 0);
const double scaledActiveTime = calculateScaledActiveTime(localActiveDuration, localActiveTime, startOffset, m_specified);
const double iterationTime = calculateIterationTime(localIterationDuration, localRepeatedDuration, scaledActiveTime, startOffset, m_specified);
currentIteration = calculateCurrentIteration(localIterationDuration, iterationTime, scaledActiveTime, m_specified);
timeFraction = calculateTransformedTime(currentIteration, localIterationDuration, iterationTime, m_specified);
}
m_calculated.currentIteration = currentIteration;
m_calculated.activeDuration = activeDuration;
m_calculated.timeFraction = timeFraction;
m_calculated.phase = currentPhase;
m_calculated.isInEffect = !isNull(activeTime);
m_calculated.isInPlay = phase() == PhaseActive && (!m_parent || m_parent->isInPlay());
m_calculated.isCurrent = phase() == PhaseBefore || isInPlay() || (m_parent && m_parent->isCurrent());
}
// Test for events even if timing didn't need an update as the player may have gained a start time.
// FIXME: Refactor so that we can ASSERT(m_player) here, this is currently required to be nullable for testing.
if (!m_player || m_player->hasStartTime()) {
// This logic is specific to CSS animation events and assumes that all
// animations start after the DocumentTimeline has started.
if (m_eventDelegate && (m_isFirstSample || previousPhase != phase() || (phase() == PhaseActive && previousIteration != m_calculated.currentIteration)))
m_eventDelegate->onEventCondition(this, m_isFirstSample, previousPhase, previousIteration);
m_isFirstSample = false;
}
bool didTriggerStyleRecalc = false;
if (needsUpdate) {
// FIXME: This probably shouldn't be recursive.
didTriggerStyleRecalc = updateChildrenAndEffects();
m_calculated.timeToEffectChange = calculateTimeToEffectChange(localTime, timeToNextIteration);
}
return didTriggerStyleRecalc;
}
} // namespace WebCore
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