third_party/WebKit/Source/core/animation/ElementAnimations.cpp

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#include "core/animation/ElementAnimations.h"

namespace blink {

ElementAnimations::ElementAnimations() : m_animationStyleChange(false) {}

ElementAnimations::~ElementAnimations() {}

void ElementAnimations::updateAnimationFlags(ComputedStyle& style) {
  for (const auto& entry : m_animations) {
    const Animation& animation = *entry.key;
    DCHECK(animation.effect());
    // FIXME: Needs to consider AnimationGroup once added.
    DCHECK(animation.effect()->isKeyframeEffect());
    const KeyframeEffect& effect = *toKeyframeEffect(animation.effect());
    if (effect.isCurrent()) {
      if (effect.affects(PropertyHandle(CSSPropertyOpacity)))
        style.setHasCurrentOpacityAnimation(true);
      if (effect.affects(PropertyHandle(CSSPropertyTransform)) ||
          effect.affects(PropertyHandle(CSSPropertyRotate)) ||
          effect.affects(PropertyHandle(CSSPropertyScale)) ||
          effect.affects(PropertyHandle(CSSPropertyTranslate)))
        style.setHasCurrentTransformAnimation(true);
      if (effect.affects(PropertyHandle(CSSPropertyFilter)))
        style.setHasCurrentFilterAnimation(true);
      if (effect.affects(PropertyHandle(CSSPropertyBackdropFilter)))
        style.setHasCurrentBackdropFilterAnimation(true);
    }
  }

  if (style.hasCurrentOpacityAnimation())
    style.setIsRunningOpacityAnimationOnCompositor(
        m_animationStack.hasActiveAnimationsOnCompositor(CSSPropertyOpacity));
  if (style.hasCurrentTransformAnimation())
    style.setIsRunningTransformAnimationOnCompositor(
        m_animationStack.hasActiveAnimationsOnCompositor(CSSPropertyTransform));
  if (style.hasCurrentFilterAnimation())
    style.setIsRunningFilterAnimationOnCompositor(
        m_animationStack.hasActiveAnimationsOnCompositor(CSSPropertyFilter));
  if (style.hasCurrentBackdropFilterAnimation())
    style.setIsRunningBackdropFilterAnimationOnCompositor(
        m_animationStack.hasActiveAnimationsOnCompositor(
            CSSPropertyBackdropFilter));
}

void ElementAnimations::restartAnimationOnCompositor() {
  for (const auto& entry : m_animations)
    entry.key->restartAnimationOnCompositor();
}

DEFINE_TRACE(ElementAnimations) {
  visitor->trace(m_cssAnimations);
  visitor->trace(m_customCompositorAnimations);
  visitor->trace(m_animationStack);
  visitor->trace(m_animations);
}

const ComputedStyle* ElementAnimations::baseComputedStyle() const {
#if !DCHECK_IS_ON()
  if (isAnimationStyleChange())
    return m_baseComputedStyle.get();
#endif
  return nullptr;
}

void ElementAnimations::updateBaseComputedStyle(
    const ComputedStyle* computedStyle) {
  if (!isAnimationStyleChange()) {
    m_baseComputedStyle = nullptr;
    return;
  }
#if DCHECK_IS_ON()
  if (m_baseComputedStyle && computedStyle)
    DCHECK(*m_baseComputedStyle == *computedStyle);
#endif
  m_baseComputedStyle = ComputedStyle::clone(*computedStyle);
}

void ElementAnimations::clearBaseComputedStyle() {
  m_baseComputedStyle = nullptr;
}

bool ElementAnimations::isAnimationStyleChange() const {
  // TODO(rune@opera.com): The FontFaceCache version number may be increased
  // without forcing a style recalc (see crbug.com/471079). ComputedStyle
  // objects created with different cache versions will not be considered equal
  // as Font::operator== will compare versions, hence ComputedStyle::operator==
  // will return false. We avoid using baseComputedStyle (the check for
  // isFallbackValid()) in that case to avoid triggering the ComputedStyle
  // comparison ASSERT in updateBaseComputedStyle.
  return m_animationStyleChange &&
         (!m_baseComputedStyle ||
          m_baseComputedStyle->font().isFallbackValid());
}

}  // namespace blink