зеркало из https://github.com/mozilla/gecko-dev.git
144 строки
4.6 KiB
C++
144 строки
4.6 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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#include "DOMSVGAnimatedLengthList.h"
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#include "DOMSVGLengthList.h"
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#include "SVGAnimatedLengthList.h"
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#include "nsSVGElement.h"
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#include "nsCOMPtr.h"
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#include "nsSVGAttrTearoffTable.h"
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#include "mozilla/dom/SVGAnimatedLengthListBinding.h"
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// See the architecture comment in this file's header.
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namespace mozilla {
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static inline
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nsSVGAttrTearoffTable<SVGAnimatedLengthList, DOMSVGAnimatedLengthList>&
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SVGAnimatedLengthListTearoffTable()
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{
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static nsSVGAttrTearoffTable<SVGAnimatedLengthList, DOMSVGAnimatedLengthList>
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sSVGAnimatedLengthListTearoffTable;
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return sSVGAnimatedLengthListTearoffTable;
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}
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NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGAnimatedLengthList, mElement)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(DOMSVGAnimatedLengthList, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(DOMSVGAnimatedLengthList, Release)
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JSObject*
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DOMSVGAnimatedLengthList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return dom::SVGAnimatedLengthListBinding::Wrap(aCx, this, aGivenProto);
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}
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already_AddRefed<DOMSVGLengthList>
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DOMSVGAnimatedLengthList::BaseVal()
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{
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if (!mBaseVal) {
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mBaseVal = new DOMSVGLengthList(this, InternalAList().GetBaseValue());
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}
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nsRefPtr<DOMSVGLengthList> baseVal = mBaseVal;
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return baseVal.forget();
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}
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already_AddRefed<DOMSVGLengthList>
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DOMSVGAnimatedLengthList::AnimVal()
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{
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if (!mAnimVal) {
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mAnimVal = new DOMSVGLengthList(this, InternalAList().GetAnimValue());
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}
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nsRefPtr<DOMSVGLengthList> animVal = mAnimVal;
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return animVal.forget();
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}
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/* static */ already_AddRefed<DOMSVGAnimatedLengthList>
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DOMSVGAnimatedLengthList::GetDOMWrapper(SVGAnimatedLengthList *aList,
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nsSVGElement *aElement,
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uint8_t aAttrEnum,
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uint8_t aAxis)
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{
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nsRefPtr<DOMSVGAnimatedLengthList> wrapper =
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SVGAnimatedLengthListTearoffTable().GetTearoff(aList);
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if (!wrapper) {
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wrapper = new DOMSVGAnimatedLengthList(aElement, aAttrEnum, aAxis);
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SVGAnimatedLengthListTearoffTable().AddTearoff(aList, wrapper);
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}
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return wrapper.forget();
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}
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/* static */ DOMSVGAnimatedLengthList*
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DOMSVGAnimatedLengthList::GetDOMWrapperIfExists(SVGAnimatedLengthList *aList)
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{
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return SVGAnimatedLengthListTearoffTable().GetTearoff(aList);
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}
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DOMSVGAnimatedLengthList::~DOMSVGAnimatedLengthList()
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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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SVGAnimatedLengthListTearoffTable().RemoveTearoff(&InternalAList());
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}
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void
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DOMSVGAnimatedLengthList::InternalBaseValListWillChangeTo(const SVGLengthList& aNewValue)
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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<DOMSVGAnimatedLengthList> kungFuDeathGrip;
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if (mBaseVal) {
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if (aNewValue.Length() < 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(aNewValue.Length());
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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 InternalAnimValListWillChangeTo() if
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// necessary.)
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if (!IsAnimating()) {
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InternalAnimValListWillChangeTo(aNewValue);
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}
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}
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void
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DOMSVGAnimatedLengthList::InternalAnimValListWillChangeTo(const SVGLengthList& aNewValue)
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{
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if (mAnimVal) {
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mAnimVal->InternalListLengthWillChange(aNewValue.Length());
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}
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}
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bool
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DOMSVGAnimatedLengthList::IsAnimating() const
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{
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return InternalAList().IsAnimating();
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}
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SVGAnimatedLengthList&
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DOMSVGAnimatedLengthList::InternalAList()
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{
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return *mElement->GetAnimatedLengthList(mAttrEnum);
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}
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const SVGAnimatedLengthList&
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DOMSVGAnimatedLengthList::InternalAList() const
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{
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return *mElement->GetAnimatedLengthList(mAttrEnum);
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}
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} // namespace mozilla
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