147 lines
4.6 KiB
C++
147 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_AnimationCollection_h
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#define mozilla_AnimationCollection_h
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#include "mozilla/dom/Animation.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/LinkedList.h"
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#include "mozilla/RefPtr.h"
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#include "nsCSSPseudoElements.h"
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#include "nsDOMMutationObserver.h"
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#include "nsTArray.h"
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class nsIAtom;
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class nsPresContext;
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namespace mozilla {
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// Traits class to define the specific atoms used when storing specializations
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// of AnimationCollection as a property on an Element (e.g. which atom
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// to use when storing an AnimationCollection<CSSAnimation> for a ::before
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// pseudo-element).
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template <class AnimationType>
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struct AnimationTypeTraits { };
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template <class AnimationType>
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class AnimationCollection
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: public LinkedListElement<AnimationCollection<AnimationType>>
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{
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typedef AnimationCollection<AnimationType> SelfType;
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typedef AnimationTypeTraits<AnimationType> TraitsType;
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AnimationCollection(dom::Element* aElement, nsIAtom* aElementProperty)
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: mElement(aElement)
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, mElementProperty(aElementProperty)
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, mCheckGeneration(0)
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#ifdef DEBUG
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, mCalledPropertyDtor(false)
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#endif
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{
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MOZ_COUNT_CTOR(AnimationCollection);
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}
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public:
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~AnimationCollection()
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{
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MOZ_ASSERT(mCalledPropertyDtor,
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"must call destructor through element property dtor");
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MOZ_COUNT_DTOR(AnimationCollection);
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LinkedListElement<SelfType>::remove();
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}
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void Destroy()
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{
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// This will call our destructor.
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mElement->DeleteProperty(mElementProperty);
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}
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static void PropertyDtor(void *aObject, nsIAtom *aPropertyName,
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void *aPropertyValue, void *aData);
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// Get the collection of animations for the given |aElement| and
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// |aPseudoType|.
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static AnimationCollection<AnimationType>*
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GetAnimationCollection(dom::Element* aElement,
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CSSPseudoElementType aPseudoType);
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// Given the frame |aFrame| with possibly animated content, finds its
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// associated collection of animations. If |aFrame| is a generated content
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// frame, this function may examine the parent frame to search for such
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// animations.
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static AnimationCollection<AnimationType>* GetAnimationCollection(
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const nsIFrame* aFrame);
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// Get the collection of animations for the given |aElement| and
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// |aPseudoType| or create it if it does not already exist.
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//
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// We'll set the outparam |aCreatedCollection| to true if we have
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// to create the collection and we successfully do so. Otherwise,
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// we'll set it to false.
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static AnimationCollection<AnimationType>*
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GetOrCreateAnimationCollection(dom::Element* aElement,
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CSSPseudoElementType aPseudoType,
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bool* aCreatedCollection);
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bool IsForElement() const { // rather than for a pseudo-element
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return mElementProperty == TraitsType::ElementPropertyAtom();
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}
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bool IsForBeforePseudo() const {
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return mElementProperty == TraitsType::BeforePropertyAtom();
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}
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bool IsForAfterPseudo() const {
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return mElementProperty == TraitsType::AfterPropertyAtom();
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}
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CSSPseudoElementType PseudoElementType() const
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{
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if (IsForElement()) {
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return CSSPseudoElementType::NotPseudo;
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}
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if (IsForBeforePseudo()) {
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return CSSPseudoElementType::before;
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}
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MOZ_ASSERT(IsForAfterPseudo(),
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"::before & ::after should be the only pseudo-elements here");
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return CSSPseudoElementType::after;
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}
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static nsString PseudoTypeAsString(CSSPseudoElementType aPseudoType);
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dom::Element *mElement;
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// the atom we use in mElement's prop table (must be a static atom,
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// i.e., in an atom list)
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nsIAtom *mElementProperty;
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InfallibleTArray<RefPtr<AnimationType>> mAnimations;
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// For CSS transitions only, we record the most recent generation
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// for which we've done the transition update, so that we avoid doing
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// it more than once per style change.
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// (Note that we also store an animation generation on each EffectSet in
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// order to track when we need to update animations on layers.)
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uint64_t mCheckGeneration;
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// Update mCheckGeneration to RestyleManager's count
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void UpdateCheckGeneration(nsPresContext* aPresContext);
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private:
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static nsIAtom* GetPropertyAtomForPseudoType(
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CSSPseudoElementType aPseudoType);
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#ifdef DEBUG
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bool mCalledPropertyDtor;
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#endif
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};
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} // namespace mozilla
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#endif // mozilla_AnimationCollection_h
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