зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
4.3 KiB
C++
123 строки
4.3 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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#include "mozilla/dom/CSSPseudoElement.h"
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#include "mozilla/dom/CSSPseudoElementBinding.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/KeyframeEffectBinding.h"
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#include "mozilla/AnimationComparator.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(CSSPseudoElement, mOriginatingElement)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(CSSPseudoElement, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(CSSPseudoElement, Release)
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CSSPseudoElement::CSSPseudoElement(dom::Element* aElement,
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PseudoStyleType aType)
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: mOriginatingElement(aElement), mPseudoType(aType) {
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MOZ_ASSERT(aElement);
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MOZ_ASSERT(aType == PseudoStyleType::after ||
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aType == PseudoStyleType::before ||
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aType == PseudoStyleType::marker,
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"Unexpected Pseudo Type");
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}
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CSSPseudoElement::~CSSPseudoElement() {
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// Element might have been unlinked already, so we have to do null check.
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if (mOriginatingElement) {
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mOriginatingElement->DeleteProperty(
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GetCSSPseudoElementPropertyAtom(mPseudoType));
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}
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}
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ParentObject CSSPseudoElement::GetParentObject() const {
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return mOriginatingElement->GetParentObject();
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}
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JSObject* CSSPseudoElement::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return CSSPseudoElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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void CSSPseudoElement::GetAnimations(const GetAnimationsOptions& aOptions,
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nsTArray<RefPtr<Animation>>& aRetVal) {
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Document* doc = mOriginatingElement->GetComposedDoc();
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if (doc) {
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// We don't need to explicitly flush throttled animations here, since
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// updating the animation style of (pseudo-)elements will never affect the
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// set of running animations and it's only the set of running animations
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// that is important here.
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doc->FlushPendingNotifications(
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ChangesToFlush(FlushType::Style, false /* flush animations */));
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}
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Element::GetAnimationsUnsorted(mOriginatingElement, mPseudoType, aRetVal);
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aRetVal.Sort(AnimationPtrComparator<RefPtr<Animation>>());
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}
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already_AddRefed<Animation> CSSPseudoElement::Animate(
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JSContext* aContext, JS::Handle<JSObject*> aKeyframes,
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const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions,
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ErrorResult& aError) {
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Nullable<ElementOrCSSPseudoElement> target;
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target.SetValue().SetAsCSSPseudoElement() = this;
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return Element::Animate(target, aContext, aKeyframes, aOptions, aError);
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}
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/* static */
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already_AddRefed<CSSPseudoElement> CSSPseudoElement::GetCSSPseudoElement(
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dom::Element* aElement, PseudoStyleType aType) {
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if (!aElement) {
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return nullptr;
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}
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nsAtom* propName = CSSPseudoElement::GetCSSPseudoElementPropertyAtom(aType);
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RefPtr<CSSPseudoElement> pseudo =
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static_cast<CSSPseudoElement*>(aElement->GetProperty(propName));
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if (pseudo) {
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return pseudo.forget();
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}
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// CSSPseudoElement is a purely external interface created on-demand, and
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// when all references from script to the pseudo are dropped, we can drop the
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// CSSPseudoElement object, so use a non-owning reference from Element to
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// CSSPseudoElement.
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pseudo = new CSSPseudoElement(aElement, aType);
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nsresult rv = aElement->SetProperty(propName, pseudo, nullptr, true);
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if (NS_FAILED(rv)) {
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NS_WARNING("SetProperty failed");
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return nullptr;
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}
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return pseudo.forget();
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}
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/* static */
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nsAtom* CSSPseudoElement::GetCSSPseudoElementPropertyAtom(
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PseudoStyleType aType) {
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switch (aType) {
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case PseudoStyleType::before:
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return nsGkAtoms::cssPseudoElementBeforeProperty;
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case PseudoStyleType::after:
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return nsGkAtoms::cssPseudoElementAfterProperty;
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case PseudoStyleType::marker:
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return nsGkAtoms::cssPseudoElementMarkerProperty;
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default:
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MOZ_ASSERT_UNREACHABLE(
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"Should not try to get CSSPseudoElement "
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"other than ::before, ::after or ::marker");
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return nullptr;
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}
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}
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} // namespace dom
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} // namespace mozilla
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