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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 THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ELEMENT_ANIMATIONS_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ELEMENT_ANIMATIONS_H_
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/animation/css/css_animations.h"
#include "third_party/blink/renderer/core/animation/effect_stack.h"
#include "third_party/blink/renderer/core/animation/worklet_animation_base.h"
#include "third_party/blink/renderer/core/css/properties/css_bitset.h"
#include "third_party/blink/renderer/platform/wtf/hash_counted_set.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
namespace blink {
class CSSAnimations;
using AnimationCountedSet = HeapHashCountedSet<WeakMember<Animation>>;
using WorkletAnimationSet = HeapHashSet<WeakMember<WorkletAnimationBase>>;
class CORE_EXPORT ElementAnimations final
: public GarbageCollected<ElementAnimations> {
public:
ElementAnimations();
~ElementAnimations();
// Animations that are currently active for this element, their effects will
// be applied during a style recalc. CSS Transitions are included in this
// stack.
EffectStack& GetEffectStack() { return effect_stack_; }
const EffectStack& GetEffectStack() const { return effect_stack_; }
// Tracks the state of active CSS Animations and Transitions. The individual
// animations will also be part of the animation stack, but the mapping
// between animation name and animation is kept here.
CSSAnimations& CssAnimations() { return css_animations_; }
const CSSAnimations& CssAnimations() const { return css_animations_; }
// Animations which have effects targeting this element.
AnimationCountedSet& Animations() { return animations_; }
// Worklet Animations which have effects targeting this element.
WorkletAnimationSet& GetWorkletAnimations() { return worklet_animations_; }
bool IsEmpty() const {
return effect_stack_.IsEmpty() && css_animations_.IsEmpty() &&
animations_.IsEmpty();
}
void RestartAnimationOnCompositor();
void UpdateAnimationFlags(ComputedStyle&);
void SetAnimationStyleChange(bool animation_style_change) {
animation_style_change_ = animation_style_change;
}
bool IsAnimationStyleChange() const { return animation_style_change_; }
const ComputedStyle* BaseComputedStyle() const;
const CSSBitset* BaseImportantSet() const;
void UpdateBaseComputedStyle(const ComputedStyle*,
std::unique_ptr<CSSBitset> base_important_set);
void ClearBaseComputedStyle();
bool UpdateBoxSizeAndCheckTransformAxisAlignment(const FloatSize& box_size);
bool IsIdentityOrTranslation() const;
void Trace(Visitor*) const;
private:
EffectStack effect_stack_;
CSSAnimations css_animations_;
AnimationCountedSet animations_;
WorkletAnimationSet worklet_animations_;
// When an Element is being animated, its entire style will be dirtied every
// frame by the running animation - even if the animation is only changing a
// few properties. To avoid the expensive cost of recomputing the entire
// style, we store a cached value of the 'base' computed style (e.g. with no
// change from the running animations) and use that during style recalc,
// applying only the animation changes on top of it.
bool animation_style_change_;
scoped_refptr<ComputedStyle> base_computed_style_;
// Keeps track of the !important declarations used to build the base
// computed style. These declarations must not be overwritten by animation
// effects, hence we have to disable the base computed style optimization when
// !important declarations conflict with active animations.
//
// If there were no !important declarations in the base style, this field
// will be nullptr.
//
// TODO(andruud): We should be able to simply skip applying the animation
// for properties in this set instead of disabling the optimization.
// However, we currently need the cascade to handle the case where
// an !important declaration appears in a :visited selector.
// See https://crbug.com/1062217.
std::unique_ptr<CSSBitset> base_important_set_;
DISALLOW_COPY_AND_ASSIGN(ElementAnimations);
FRIEND_TEST_ALL_PREFIXES(StyleEngineTest, PseudoElementBaseComputedStyle);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ELEMENT_ANIMATIONS_H_
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