text: // -------------------------------------------------
  // BlinKit - BlinKit Library
  // -------------------------------------------------
  //   File Name: ElementAnimations.cpp
  // Description: ElementAnimations Class
  //      Author: Ziming Li
  //     Created: 2021-07-17
  // -------------------------------------------------
  // Copyright (C) 2021 MingYang Software Technology.
  // -------------------------------------------------
  
  /*
   * 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 "core/animation/ElementAnimations.h"
  
  #include "core/layout/LayoutObject.h"
  
  namespace blink {
  
  ElementAnimations::ElementAnimations()
      : m_animationStyleChange(false)
  {
  }
  
  ElementAnimations::~ElementAnimations()
  {
  #if !ENABLE(OILPAN)
      ASSERT(m_effects.isEmpty());
  #endif
  }
  
  #if !ENABLE(OILPAN)
  void ElementAnimations::dispose()
  {
      // The notifyElementDestroyed() is called for elements that happen to live
      // longer than the KeyframeEffect. This undeterminism is fine because
      // all the notifyElementDestroyed() does is to clear the raw pointers
      // held by the KeyframeEffect.
      for (KeyframeEffect* effect : m_effects)
          effect->notifyElementDestroyed();
      m_effects.clear();
  }
  #endif
  
  void ElementAnimations::updateAnimationFlags(ComputedStyle& style)
  {
      for (const auto& entry : m_animations) {
          const Animation& animation = *entry.first;
          ASSERT(animation.effect());
          // FIXME: Needs to consider AnimationGroup once added.
          ASSERT(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(CSSPropertyWebkitFilter)))
                  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(CSSPropertyWebkitFilter));
      if (style.hasCurrentBackdropFilterAnimation())
          style.setIsRunningBackdropFilterAnimationOnCompositor(m_animationStack.hasActiveAnimationsOnCompositor(CSSPropertyBackdropFilter));
  }
  
  void ElementAnimations::restartAnimationOnCompositor()
  {
      for (const auto& entry : m_animations)
          entry.first->restartAnimationOnCompositor();
  }
  
  DEFINE_TRACE(ElementAnimations)
  {
      visitor->trace(m_cssAnimations);
      visitor->trace(m_animationStack);
      visitor->trace(m_animations);
  #if !ENABLE(OILPAN)
      visitor->trace(m_effects);
  #endif
  }
  
  const ComputedStyle* ElementAnimations::baseComputedStyle() const
  {
  #if !ENABLE(ASSERT)
      if (isAnimationStyleChange())
          return m_baseComputedStyle.get();
  #endif
      return nullptr;
  }
  
  void ElementAnimations::updateBaseComputedStyle(const ComputedStyle* computedStyle)
  {
      if (!isAnimationStyleChange()) {
          m_baseComputedStyle = nullptr;
          return;
      }
  #if ENABLE(ASSERT)
      if (m_baseComputedStyle && computedStyle)
          ASSERT(*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
  