1 /* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ELEMENT_ANIMATIONS_H_ 32 #define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ELEMENT_ANIMATIONS_H_ 33 34 #include "base/macros.h" 35 #include "base/memory/scoped_refptr.h" 36 #include "third_party/blink/renderer/core/animation/css/css_animations.h" 37 #include "third_party/blink/renderer/core/animation/effect_stack.h" 38 #include "third_party/blink/renderer/core/animation/worklet_animation_base.h" 39 #include "third_party/blink/renderer/core/css/properties/css_bitset.h" 40 #include "third_party/blink/renderer/platform/wtf/hash_counted_set.h" 41 #include "third_party/blink/renderer/platform/wtf/hash_map.h" 42 43 namespace blink { 44 45 class CSSAnimations; 46 47 using AnimationCountedSet = HeapHashCountedSet<WeakMember<Animation>>; 48 using WorkletAnimationSet = HeapHashSet<WeakMember<WorkletAnimationBase>>; 49 50 class CORE_EXPORT ElementAnimations final 51 : public GarbageCollected<ElementAnimations> { 52 public: 53 ElementAnimations(); 54 ~ElementAnimations(); 55 56 // Animations that are currently active for this element, their effects will 57 // be applied during a style recalc. CSS Transitions are included in this 58 // stack. GetEffectStack()59 EffectStack& GetEffectStack() { return effect_stack_; } GetEffectStack()60 const EffectStack& GetEffectStack() const { return effect_stack_; } 61 // Tracks the state of active CSS Animations and Transitions. The individual 62 // animations will also be part of the animation stack, but the mapping 63 // between animation name and animation is kept here. CssAnimations()64 CSSAnimations& CssAnimations() { return css_animations_; } CssAnimations()65 const CSSAnimations& CssAnimations() const { return css_animations_; } 66 67 // Animations which have effects targeting this element. Animations()68 AnimationCountedSet& Animations() { return animations_; } 69 // Worklet Animations which have effects targeting this element. GetWorkletAnimations()70 WorkletAnimationSet& GetWorkletAnimations() { return worklet_animations_; } 71 IsEmpty()72 bool IsEmpty() const { 73 return effect_stack_.IsEmpty() && css_animations_.IsEmpty() && 74 animations_.IsEmpty(); 75 } 76 77 void RestartAnimationOnCompositor(); 78 79 void UpdateAnimationFlags(ComputedStyle&); SetAnimationStyleChange(bool animation_style_change)80 void SetAnimationStyleChange(bool animation_style_change) { 81 animation_style_change_ = animation_style_change; 82 } IsAnimationStyleChange()83 bool IsAnimationStyleChange() const { return animation_style_change_; } 84 85 const ComputedStyle* BaseComputedStyle() const; 86 const CSSBitset* BaseImportantSet() const; 87 void UpdateBaseComputedStyle(const ComputedStyle*, 88 std::unique_ptr<CSSBitset> base_important_set); 89 void ClearBaseComputedStyle(); 90 91 bool UpdateBoxSizeAndCheckTransformAxisAlignment(const FloatSize& box_size); 92 93 void Trace(Visitor*) const; 94 95 private: 96 EffectStack effect_stack_; 97 CSSAnimations css_animations_; 98 AnimationCountedSet animations_; 99 WorkletAnimationSet worklet_animations_; 100 101 // When an Element is being animated, its entire style will be dirtied every 102 // frame by the running animation - even if the animation is only changing a 103 // few properties. To avoid the expensive cost of recomputing the entire 104 // style, we store a cached value of the 'base' computed style (e.g. with no 105 // change from the running animations) and use that during style recalc, 106 // applying only the animation changes on top of it. 107 bool animation_style_change_; 108 scoped_refptr<ComputedStyle> base_computed_style_; 109 // Keeps track of the !important declarations used to build the base 110 // computed style. These declarations must not be overwritten by animation 111 // effects, hence we have to disable the base computed style optimization when 112 // !important declarations conflict with active animations. 113 // 114 // If there were no !important declarations in the base style, this field 115 // will be nullptr. 116 // 117 // TODO(andruud): We should be able to simply skip applying the animation 118 // for properties in this set instead of disabling the optimization. 119 // However, we currently need the cascade to handle the case where 120 // an !important declaration appears in a :visited selector. 121 // See https://crbug.com/1062217. 122 std::unique_ptr<CSSBitset> base_important_set_; 123 124 DISALLOW_COPY_AND_ASSIGN(ElementAnimations); 125 126 FRIEND_TEST_ALL_PREFIXES(StyleEngineTest, PseudoElementBaseComputedStyle); 127 }; 128 129 } // namespace blink 130 131 #endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ELEMENT_ANIMATIONS_H_ 132