зеркало из https://github.com/mozilla/gecko-dev.git
109 строки
3.6 KiB
C++
109 строки
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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_AnimationTarget_h
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#define mozilla_AnimationTarget_h
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#include "mozilla/Attributes.h" // For MOZ_NON_OWNING_REF
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#include "mozilla/HashFunctions.h" // For HashNumber, AddToHash
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#include "mozilla/HashTable.h" // For DefaultHasher, PointerHasher
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#include "mozilla/Maybe.h"
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#include "mozilla/RefPtr.h"
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#include "nsCSSPseudoElements.h"
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namespace mozilla {
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namespace dom {
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class Element;
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} // namespace dom
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struct OwningAnimationTarget {
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OwningAnimationTarget() = default;
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OwningAnimationTarget(dom::Element* aElement, PseudoStyleType aType)
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: mElement(aElement), mPseudoType(aType) {}
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explicit OwningAnimationTarget(dom::Element* aElement) : mElement(aElement) {}
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bool operator==(const OwningAnimationTarget& aOther) const {
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return mElement == aOther.mElement && mPseudoType == aOther.mPseudoType;
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}
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explicit operator bool() const { return !!mElement; }
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// mElement represents the parent element of a pseudo-element, not the
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// generated content element.
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RefPtr<dom::Element> mElement;
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PseudoStyleType mPseudoType = PseudoStyleType::NotPseudo;
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};
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struct NonOwningAnimationTarget {
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NonOwningAnimationTarget() = default;
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NonOwningAnimationTarget(dom::Element* aElement, PseudoStyleType aType)
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: mElement(aElement), mPseudoType(aType) {}
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explicit NonOwningAnimationTarget(const OwningAnimationTarget& aOther)
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: mElement(aOther.mElement), mPseudoType(aOther.mPseudoType) {}
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bool operator==(const NonOwningAnimationTarget& aOther) const {
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return mElement == aOther.mElement && mPseudoType == aOther.mPseudoType;
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}
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NonOwningAnimationTarget& operator=(const OwningAnimationTarget& aOther) {
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mElement = aOther.mElement;
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mPseudoType = aOther.mPseudoType;
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return *this;
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}
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explicit operator bool() const { return !!mElement; }
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// mElement represents the parent element of a pseudo-element, not the
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// generated content element.
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dom::Element* MOZ_NON_OWNING_REF mElement = nullptr;
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PseudoStyleType mPseudoType = PseudoStyleType::NotPseudo;
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};
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// Helper functions for cycle-collecting Maybe<OwningAnimationTarget>
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inline void ImplCycleCollectionTraverse(
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nsCycleCollectionTraversalCallback& aCallback,
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Maybe<OwningAnimationTarget>& aTarget, const char* aName,
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uint32_t aFlags = 0) {
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if (aTarget) {
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ImplCycleCollectionTraverse(aCallback, aTarget->mElement, aName, aFlags);
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}
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}
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inline void ImplCycleCollectionUnlink(Maybe<OwningAnimationTarget>& aTarget) {
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if (aTarget) {
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ImplCycleCollectionUnlink(aTarget->mElement);
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}
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}
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// A DefaultHasher specialization for OwningAnimationTarget.
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template <>
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struct DefaultHasher<OwningAnimationTarget> {
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using Key = OwningAnimationTarget;
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using Lookup = OwningAnimationTarget;
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using PtrHasher = PointerHasher<dom::Element*>;
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static HashNumber hash(const Lookup& aLookup) {
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return AddToHash(PtrHasher::hash(aLookup.mElement.get()),
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static_cast<uint8_t>(aLookup.mPseudoType));
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}
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static bool match(const Key& aKey, const Lookup& aLookup) {
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return PtrHasher::match(aKey.mElement.get(), aLookup.mElement.get()) &&
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aKey.mPseudoType == aLookup.mPseudoType;
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}
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static void rekey(Key& aKey, Key&& aNewKey) { aKey = std::move(aNewKey); }
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};
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} // namespace mozilla
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#endif // mozilla_AnimationTarget_h
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