void
ElementTransitions::EnsureStyleRuleFor(TimeStamp aRefreshTime)
{
if (!mStyleRule || mStyleRuleRefreshTime != aRefreshTime) {
mStyleRule = new css::AnimValuesStyleRule();
mStyleRuleRefreshTime = aRefreshTime;
for (PRUint32 i = 0, i_end = mPropertyTransitions.Length(); i < i_end; ++i)
{
ElementPropertyTransition &pt = mPropertyTransitions[i];
if (pt.IsRemovedSentinel()) {
continue;
}
nsStyleAnimation::Value *val = mStyleRule->AddEmptyValue(pt.mProperty);
double valuePortion = pt.ValuePortionFor(aRefreshTime);
#ifdef DEBUG
bool ok =
#endif
nsStyleAnimation::Interpolate(pt.mProperty,
pt.mStartValue, pt.mEndValue,
valuePortion, *val);
NS_ABORT_IF_FALSE(ok, "could not interpolate values");
}
}
}
void
Animation::ComposeStyle(nsRefPtr<css::AnimValuesStyleRule>& aStyleRule,
nsCSSPropertySet& aSetProperties)
{
ComputedTiming computedTiming = GetComputedTiming();
// If the time fraction is null, we don't have fill data for the current
// time so we shouldn't animate.
if (computedTiming.mTimeFraction == ComputedTiming::kNullTimeFraction) {
return;
}
MOZ_ASSERT(0.0 <= computedTiming.mTimeFraction &&
computedTiming.mTimeFraction <= 1.0,
"timing fraction should be in [0-1]");
for (size_t propIdx = 0, propEnd = mProperties.Length();
propIdx != propEnd; ++propIdx)
{
const AnimationProperty& prop = mProperties[propIdx];
MOZ_ASSERT(prop.mSegments[0].mFromKey == 0.0, "incorrect first from key");
MOZ_ASSERT(prop.mSegments[prop.mSegments.Length() - 1].mToKey == 1.0,
"incorrect last to key");
if (aSetProperties.HasProperty(prop.mProperty)) {
// Animations are composed by AnimationPlayerCollection by iterating
// from the last animation to first. For animations targetting the
// same property, the later one wins. So if this property is already set,
// we should not override it.
return;
}
aSetProperties.AddProperty(prop.mProperty);
MOZ_ASSERT(prop.mSegments.Length() > 0,
"property should not be in animations if it has no segments");
// FIXME: Maybe cache the current segment?
const AnimationPropertySegment *segment = prop.mSegments.Elements(),
*segmentEnd = segment + prop.mSegments.Length();
while (segment->mToKey < computedTiming.mTimeFraction) {
MOZ_ASSERT(segment->mFromKey < segment->mToKey, "incorrect keys");
++segment;
if (segment == segmentEnd) {
MOZ_ASSERT_UNREACHABLE("incorrect time fraction");
break; // in order to continue in outer loop (just below)
}
MOZ_ASSERT(segment->mFromKey == (segment-1)->mToKey, "incorrect keys");
}
if (segment == segmentEnd) {
continue;
}
MOZ_ASSERT(segment->mFromKey < segment->mToKey, "incorrect keys");
MOZ_ASSERT(segment >= prop.mSegments.Elements() &&
size_t(segment - prop.mSegments.Elements()) <
prop.mSegments.Length(),
"out of array bounds");
if (!aStyleRule) {
// Allocate the style rule now that we know we have animation data.
aStyleRule = new css::AnimValuesStyleRule();
}
double positionInSegment =
(computedTiming.mTimeFraction - segment->mFromKey) /
(segment->mToKey - segment->mFromKey);
double valuePosition =
segment->mTimingFunction.GetValue(positionInSegment);
StyleAnimationValue *val = aStyleRule->AddEmptyValue(prop.mProperty);
#ifdef DEBUG
bool result =
#endif
StyleAnimationValue::Interpolate(prop.mProperty,
segment->mFromValue,
segment->mToValue,
valuePosition, *val);
MOZ_ASSERT(result, "interpolate must succeed now");
}
}
void
ElementAnimations::EnsureStyleRuleFor(TimeStamp aRefreshTime,
EventArray& aEventsToDispatch)
{
if (!mNeedsRefreshes) {
// All of our animations are paused or completed.
mStyleRuleRefreshTime = aRefreshTime;
return;
}
// mStyleRule may be null and valid, if we have no style to apply.
if (mStyleRuleRefreshTime.IsNull() ||
mStyleRuleRefreshTime != aRefreshTime) {
mStyleRuleRefreshTime = aRefreshTime;
mStyleRule = nsnull;
// We'll set mNeedsRefreshes to true below in all cases where we need them.
mNeedsRefreshes = false;
// FIXME(spec): assume that properties in higher animations override
// those in lower ones.
// Therefore, we iterate from last animation to first.
nsCSSPropertySet properties;
for (PRUint32 animIdx = mAnimations.Length(); animIdx-- != 0; ) {
ElementAnimation &anim = mAnimations[animIdx];
if (anim.mProperties.Length() == 0 ||
anim.mIterationDuration.ToMilliseconds() <= 0.0) {
// No animation data.
continue;
}
TimeDuration currentTimeDuration;
if (anim.IsPaused()) {
// FIXME: avoid recalculating every time
currentTimeDuration = anim.mPauseStart - anim.mStartTime;
} else {
currentTimeDuration = aRefreshTime - anim.mStartTime;
}
// Set |currentIterationCount| to the (fractional) number of
// iterations we've completed up to the current position.
double currentIterationCount =
currentTimeDuration / anim.mIterationDuration;
bool dispatchStartOrIteration = false;
if (currentIterationCount >= double(anim.mIterationCount)) {
// Dispatch 'animationend' when needed.
if (IsForElement() &&
anim.mLastNotification !=
ElementAnimation::LAST_NOTIFICATION_END) {
anim.mLastNotification = ElementAnimation::LAST_NOTIFICATION_END;
AnimationEventInfo ei(mElement, anim.mName, NS_ANIMATION_END,
currentTimeDuration);
aEventsToDispatch.AppendElement(ei);
}
if (!anim.FillsForwards()) {
// No animation data.
continue;
}
currentIterationCount = double(anim.mIterationCount);
} else {
if (!anim.IsPaused()) {
mNeedsRefreshes = true;
}
if (currentIterationCount < 0.0) {
if (!anim.FillsBackwards()) {
// No animation data.
continue;
}
currentIterationCount = 0.0;
} else {
dispatchStartOrIteration = !anim.IsPaused();
}
}
// Set |positionInIteration| to the position from 0% to 100% along
// the keyframes.
NS_ABORT_IF_FALSE(currentIterationCount >= 0.0, "must be positive");
PRUint32 whichIteration = int(currentIterationCount);
if (whichIteration == anim.mIterationCount && whichIteration != 0) {
// When the animation's iteration count is an integer (as it
// normally is), we need to end at 100% of its last iteration
// rather than 0% of the next one (unless it's zero).
--whichIteration;
}
double positionInIteration =
currentIterationCount - double(whichIteration);
bool thisIterationReverse = false;
switch (anim.mDirection) {
case NS_STYLE_ANIMATION_DIRECTION_NORMAL:
thisIterationReverse = false;
break;
case NS_STYLE_ANIMATION_DIRECTION_REVERSE:
thisIterationReverse = true;
break;
case NS_STYLE_ANIMATION_DIRECTION_ALTERNATE:
thisIterationReverse = (whichIteration & 1) == 1;
break;
case NS_STYLE_ANIMATION_DIRECTION_ALTERNATE_REVERSE:
thisIterationReverse = (whichIteration & 1) == 0;
break;
}
if (thisIterationReverse) {
positionInIteration = 1.0 - positionInIteration;
}
// Dispatch 'animationstart' or 'animationiteration' when needed.
if (IsForElement() && dispatchStartOrIteration &&
whichIteration != anim.mLastNotification) {
// Notify 'animationstart' even if a negative delay puts us
// past the first iteration.
// Note that when somebody changes the animation-duration
// dynamically, this will fire an extra iteration event
// immediately in many cases. It's not clear to me if that's the
// right thing to do.
PRUint32 message =
anim.mLastNotification == ElementAnimation::LAST_NOTIFICATION_NONE
? NS_ANIMATION_START : NS_ANIMATION_ITERATION;
anim.mLastNotification = whichIteration;
AnimationEventInfo ei(mElement, anim.mName, message,
currentTimeDuration);
aEventsToDispatch.AppendElement(ei);
}
NS_ABORT_IF_FALSE(0.0 <= positionInIteration &&
positionInIteration <= 1.0,
"position should be in [0-1]");
for (PRUint32 propIdx = 0, propEnd = anim.mProperties.Length();
propIdx != propEnd; ++propIdx)
{
const AnimationProperty &prop = anim.mProperties[propIdx];
NS_ABORT_IF_FALSE(prop.mSegments[0].mFromKey == 0.0,
"incorrect first from key");
NS_ABORT_IF_FALSE(prop.mSegments[prop.mSegments.Length() - 1].mToKey
== 1.0,
"incorrect last to key");
if (properties.HasProperty(prop.mProperty)) {
// A later animation already set this property.
continue;
}
properties.AddProperty(prop.mProperty);
NS_ABORT_IF_FALSE(prop.mSegments.Length() > 0,
"property should not be in animations if it "
"has no segments");
// FIXME: Maybe cache the current segment?
const AnimationPropertySegment *segment = prop.mSegments.Elements();
while (segment->mToKey < positionInIteration) {
NS_ABORT_IF_FALSE(segment->mFromKey < segment->mToKey,
"incorrect keys");
++segment;
NS_ABORT_IF_FALSE(segment->mFromKey == (segment-1)->mToKey,
"incorrect keys");
}
NS_ABORT_IF_FALSE(segment->mFromKey < segment->mToKey,
"incorrect keys");
NS_ABORT_IF_FALSE(segment - prop.mSegments.Elements() <
prop.mSegments.Length(),
"ran off end");
if (!mStyleRule) {
// Allocate the style rule now that we know we have animation data.
mStyleRule = new css::AnimValuesStyleRule();
}
double positionInSegment = (positionInIteration - segment->mFromKey) /
(segment->mToKey - segment->mFromKey);
double valuePosition =
segment->mTimingFunction.GetValue(positionInSegment);
nsStyleAnimation::Value *val =
mStyleRule->AddEmptyValue(prop.mProperty);
#ifdef DEBUG
bool result =
#endif
nsStyleAnimation::Interpolate(prop.mProperty,
segment->mFromValue, segment->mToValue,
valuePosition, *val);
NS_ABORT_IF_FALSE(result, "interpolate must succeed now");
}
}
}
}
