зеркало из https://github.com/mozilla/gecko-dev.git
138 строки
4.2 KiB
C++
138 строки
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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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#include "mozilla/dom/SVGAnimatedTransformList.h"
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#include "DOMSVGTransformList.h"
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#include "nsSVGAnimatedTransformList.h"
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#include "nsSVGAttrTearoffTable.h"
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#include "mozilla/dom/SVGAnimatedTransformListBinding.h"
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namespace mozilla {
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namespace dom {
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static
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nsSVGAttrTearoffTable<nsSVGAnimatedTransformList, SVGAnimatedTransformList>
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sSVGAnimatedTransformListTearoffTable;
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NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(SVGAnimatedTransformList, mElement)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(SVGAnimatedTransformList, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(SVGAnimatedTransformList, Release)
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JSObject*
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SVGAnimatedTransformList::WrapObject(JSContext* aCx)
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{
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return SVGAnimatedTransformListBinding::Wrap(aCx, this);
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}
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//----------------------------------------------------------------------
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already_AddRefed<DOMSVGTransformList>
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SVGAnimatedTransformList::BaseVal()
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{
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if (!mBaseVal) {
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mBaseVal = new DOMSVGTransformList(this, InternalAList().GetBaseValue());
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}
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nsRefPtr<DOMSVGTransformList> baseVal = mBaseVal;
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return baseVal.forget();
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}
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already_AddRefed<DOMSVGTransformList>
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SVGAnimatedTransformList::AnimVal()
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{
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if (!mAnimVal) {
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mAnimVal = new DOMSVGTransformList(this, InternalAList().GetAnimValue());
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}
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nsRefPtr<DOMSVGTransformList> animVal = mAnimVal;
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return animVal.forget();
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}
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/* static */ already_AddRefed<SVGAnimatedTransformList>
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SVGAnimatedTransformList::GetDOMWrapper(nsSVGAnimatedTransformList *aList,
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nsSVGElement *aElement)
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{
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nsRefPtr<SVGAnimatedTransformList> wrapper =
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sSVGAnimatedTransformListTearoffTable.GetTearoff(aList);
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if (!wrapper) {
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wrapper = new SVGAnimatedTransformList(aElement);
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sSVGAnimatedTransformListTearoffTable.AddTearoff(aList, wrapper);
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}
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return wrapper.forget();
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}
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/* static */ SVGAnimatedTransformList*
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SVGAnimatedTransformList::GetDOMWrapperIfExists(
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nsSVGAnimatedTransformList *aList)
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{
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return sSVGAnimatedTransformListTearoffTable.GetTearoff(aList);
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}
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SVGAnimatedTransformList::~SVGAnimatedTransformList()
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{
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// Script no longer has any references to us, to our base/animVal objects, or
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// to any of their list items.
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sSVGAnimatedTransformListTearoffTable.RemoveTearoff(&InternalAList());
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}
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void
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SVGAnimatedTransformList::InternalBaseValListWillChangeLengthTo(
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uint32_t aNewLength)
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{
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// When the number of items in our internal counterpart's baseVal changes,
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// we MUST keep our baseVal in sync. If we don't, script will either see a
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// list that is too short and be unable to access indexes that should be
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// valid, or else, MUCH WORSE, script will see a list that is too long and be
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// able to access "items" at indexes that are out of bounds (read/write to
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// bad memory)!!
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nsRefPtr<SVGAnimatedTransformList> kungFuDeathGrip;
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if (mBaseVal) {
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if (aNewLength < mBaseVal->LengthNoFlush()) {
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// InternalListLengthWillChange might clear last reference to |this|.
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// Retain a temporary reference to keep from dying before returning.
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kungFuDeathGrip = this;
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}
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mBaseVal->InternalListLengthWillChange(aNewLength);
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}
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// If our attribute is not animating, then our animVal mirrors our baseVal
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// and we must sync its length too. (If our attribute is animating, then the
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// SMIL engine takes care of calling InternalAnimValListWillChangeLengthTo()
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// if necessary.)
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if (!IsAnimating()) {
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InternalAnimValListWillChangeLengthTo(aNewLength);
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}
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}
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void
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SVGAnimatedTransformList::InternalAnimValListWillChangeLengthTo(
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uint32_t aNewLength)
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{
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if (mAnimVal) {
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mAnimVal->InternalListLengthWillChange(aNewLength);
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}
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}
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bool
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SVGAnimatedTransformList::IsAnimating() const
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{
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return InternalAList().IsAnimating();
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}
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nsSVGAnimatedTransformList&
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SVGAnimatedTransformList::InternalAList()
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{
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return *mElement->GetAnimatedTransformList();
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}
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const nsSVGAnimatedTransformList&
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SVGAnimatedTransformList::InternalAList() const
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{
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return *mElement->GetAnimatedTransformList();
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}
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} // namespace dom
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} // namespace mozilla
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