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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "DOMSVGAnimatedLengthList.h"
#include "DOMSVGLengthList.h"
#include "SVGAnimatedLengthList.h"
#include "nsSVGElement.h"
#include "nsCOMPtr.h"
#include "nsSVGAttrTearoffTable.h"
#include "mozilla/dom/SVGAnimatedLengthListBinding.h"
// See the architecture comment in this file's header.
namespace mozilla {
static inline
nsSVGAttrTearoffTable<SVGAnimatedLengthList, DOMSVGAnimatedLengthList>&
SVGAnimatedLengthListTearoffTable()
{
static nsSVGAttrTearoffTable<SVGAnimatedLengthList, DOMSVGAnimatedLengthList>
sSVGAnimatedLengthListTearoffTable;
return sSVGAnimatedLengthListTearoffTable;
}
NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGAnimatedLengthList, mElement)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(DOMSVGAnimatedLengthList, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(DOMSVGAnimatedLengthList, Release)
JSObject*
DOMSVGAnimatedLengthList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return dom::SVGAnimatedLengthListBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<DOMSVGLengthList>
DOMSVGAnimatedLengthList::BaseVal()
{
if (!mBaseVal) {
mBaseVal = new DOMSVGLengthList(this, InternalAList().GetBaseValue());
}
RefPtr<DOMSVGLengthList> baseVal = mBaseVal;
return baseVal.forget();
}
already_AddRefed<DOMSVGLengthList>
DOMSVGAnimatedLengthList::AnimVal()
{
if (!mAnimVal) {
mAnimVal = new DOMSVGLengthList(this, InternalAList().GetAnimValue());
}
RefPtr<DOMSVGLengthList> animVal = mAnimVal;
return animVal.forget();
}
/* static */ already_AddRefed<DOMSVGAnimatedLengthList>
DOMSVGAnimatedLengthList::GetDOMWrapper(SVGAnimatedLengthList *aList,
nsSVGElement *aElement,
uint8_t aAttrEnum,
uint8_t aAxis)
{
RefPtr<DOMSVGAnimatedLengthList> wrapper =
SVGAnimatedLengthListTearoffTable().GetTearoff(aList);
if (!wrapper) {
wrapper = new DOMSVGAnimatedLengthList(aElement, aAttrEnum, aAxis);
SVGAnimatedLengthListTearoffTable().AddTearoff(aList, wrapper);
}
return wrapper.forget();
}
/* static */ DOMSVGAnimatedLengthList*
DOMSVGAnimatedLengthList::GetDOMWrapperIfExists(SVGAnimatedLengthList *aList)
{
return SVGAnimatedLengthListTearoffTable().GetTearoff(aList);
}
DOMSVGAnimatedLengthList::~DOMSVGAnimatedLengthList()
{
// Script no longer has any references to us, to our base/animVal objects, or
// to any of their list items.
SVGAnimatedLengthListTearoffTable().RemoveTearoff(&InternalAList());
}
void
DOMSVGAnimatedLengthList::InternalBaseValListWillChangeTo(const SVGLengthList& aNewValue)
{
// When the number of items in our internal counterpart's baseVal changes,
// we MUST keep our baseVal in sync. If we don't, script will either see a
// list that is too short and be unable to access indexes that should be
// valid, or else, MUCH WORSE, script will see a list that is too long and be
// able to access "items" at indexes that are out of bounds (read/write to
// bad memory)!!
RefPtr<DOMSVGAnimatedLengthList> kungFuDeathGrip;
if (mBaseVal) {
if (aNewValue.Length() < mBaseVal->LengthNoFlush()) {
// InternalListLengthWillChange might clear last reference to |this|.
// Retain a temporary reference to keep from dying before returning.
kungFuDeathGrip = this;
}
mBaseVal->InternalListLengthWillChange(aNewValue.Length());
}
// If our attribute is not animating, then our animVal mirrors our baseVal
// and we must sync its length too. (If our attribute is animating, then the
// SMIL engine takes care of calling InternalAnimValListWillChangeTo() if
// necessary.)
if (!IsAnimating()) {
InternalAnimValListWillChangeTo(aNewValue);
}
}
void
DOMSVGAnimatedLengthList::InternalAnimValListWillChangeTo(const SVGLengthList& aNewValue)
{
if (mAnimVal) {
mAnimVal->InternalListLengthWillChange(aNewValue.Length());
}
}
bool
DOMSVGAnimatedLengthList::IsAnimating() const
{
return InternalAList().IsAnimating();
}
SVGAnimatedLengthList&
DOMSVGAnimatedLengthList::InternalAList()
{
return *mElement->GetAnimatedLengthList(mAttrEnum);
}
const SVGAnimatedLengthList&
DOMSVGAnimatedLengthList::InternalAList() const
{
return *mElement->GetAnimatedLengthList(mAttrEnum);
}
} // namespace mozilla
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