nsresult
SVGAnimatedPathSegList::SetAnimValue(const SVGPathData& aNewAnimValue,
nsSVGElement *aElement)
{
// Note that a new animation may totally change the number of items in the
// animVal list, either replacing what was essentially a mirror of the
// baseVal list, or else replacing and overriding an existing animation.
// Unfortunately it is not possible for us to reliably distinguish between
// calls to this method that are setting a new sample for an existing
// animation, and calls that are setting the first sample of an animation
// that will override an existing animation. In the case of DOMSVGPathSegList
// the InternalListWillChangeTo method is not virtually free as it is for the
// other DOM list classes, so this is a shame. We'd quite like to be able to
// skip the call if possible.
// We must send these notifications *before* changing mAnimVal! (See above.)
DOMSVGPathSegList *domWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (domWrapper) {
domWrapper->InternalListWillChangeTo(aNewAnimValue);
}
if (!mAnimVal) {
mAnimVal = new SVGPathData();
}
nsresult rv = mAnimVal->CopyFrom(aNewAnimValue);
if (NS_FAILED(rv)) {
// OOM. We clear the animation and, importantly, ClearAnimValue() ensures
// that mAnimVal's DOM wrapper (if any) is kept in sync!
ClearAnimValue(aElement);
}
aElement->DidAnimatePathSegList();
return rv;
}
nsresult
SVGAnimatedPathSegList::SetBaseValueString(const nsAString& aValue)
{
SVGPathData newBaseValue;
// The spec says that the path data is parsed and accepted up to the first
// error encountered, so we don't return early if an error occurs. However,
// we do want to throw any error code from setAttribute if there's a problem.
nsresult rv = newBaseValue.SetValueFromString(aValue);
// We must send these notifications *before* changing mBaseVal! Our baseVal's
// DOM wrapper list may have to remove DOM items from itself, and any removed
// DOM items need to copy their internal counterpart's values *before* we
// change them. See the comments in
// DOMSVGPathSegList::InternalListWillChangeTo().
DOMSVGPathSegList *baseValWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetBaseValKey());
if (baseValWrapper) {
baseValWrapper->InternalListWillChangeTo(newBaseValue);
}
DOMSVGPathSegList* animValWrapper = nullptr;
if (!IsAnimating()) { // DOM anim val wraps our base val too!
animValWrapper = DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (animValWrapper) {
animValWrapper->InternalListWillChangeTo(newBaseValue);
}
}
// Only now may we modify mBaseVal!
// We don't need to call DidChange* here - we're only called by
// nsSVGElement::ParseAttribute under Element::SetAttr,
// which takes care of notifying.
nsresult rv2 = mBaseVal.CopyFrom(newBaseValue);
if (NS_FAILED(rv2)) {
// Attempting to increase mBaseVal's length failed (mBaseVal is left
// unmodified). We MUST keep any DOM wrappers in sync:
if (baseValWrapper) {
baseValWrapper->InternalListWillChangeTo(mBaseVal);
}
if (animValWrapper) {
animValWrapper->InternalListWillChangeTo(mBaseVal);
}
return rv2;
}
return rv;
}
void
SVGAnimatedPathSegList::ClearAnimValue(nsSVGElement *aElement)
{
// We must send these notifications *before* changing mAnimVal! (See above.)
DOMSVGPathSegList *domWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (domWrapper) {
// When all animation ends, animVal simply mirrors baseVal, which may have
// a different number of items to the last active animated value.
//
domWrapper->InternalListWillChangeTo(mBaseVal);
}
mAnimVal = nullptr;
aElement->DidAnimatePathSegList();
}
void
SVGAnimatedPathSegList::ClearBaseValue()
{
// We must send these notifications *before* changing mBaseVal! (See above.)
DOMSVGPathSegList *baseValWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetBaseValKey());
if (baseValWrapper) {
baseValWrapper->InternalListWillChangeTo(SVGPathData());
}
if (!IsAnimating()) { // DOM anim val wraps our base val too!
DOMSVGPathSegList *animValWrapper =
DOMSVGPathSegList::GetDOMWrapperIfExists(GetAnimValKey());
if (animValWrapper) {
animValWrapper->InternalListWillChangeTo(SVGPathData());
}
}
mBaseVal.Clear();
// Caller notifies
}
nsresult
SVGAnimatedPointList::SetAnimValue(const SVGPointList& aNewAnimValue,
nsSVGElement *aElement)
{
// Note that a new animation may totally change the number of items in the
// animVal list, either replacing what was essentially a mirror of the
// baseVal list, or else replacing and overriding an existing animation.
// It is not possible for us to reliably distinguish between calls to this
// method that are setting a new sample for an existing animation (in which
// case our list length isn't changing and we wouldn't need to notify our DOM
// wrapper to keep its length in sync), and calls to this method that are
// setting the first sample of a new animation that will override the base
// value/an existing animation (in which case our length may be changing and
// our DOM wrapper may need to be notified). Happily though, it's cheap to
// just blindly notify our animVal's DOM wrapper of our new value each time
// this method is called, so that's what we do.
// We must send this notification *before* changing mAnimVal! (See above.)
DOMSVGPointList *domWrapper =
DOMSVGPointList::GetDOMWrapperIfExists(GetAnimValKey());
if (domWrapper) {
domWrapper->InternalListWillChangeTo(aNewAnimValue);
}
if (!mAnimVal) {
mAnimVal = new SVGPointList();
}
nsresult rv = mAnimVal->CopyFrom(aNewAnimValue);
if (NS_FAILED(rv)) {
// OOM. We clear the animation and, importantly, ClearAnimValue() ensures
// that mAnimVal's DOM wrapper (if any) is kept in sync!
ClearAnimValue(aElement);
return rv;
}
aElement->DidAnimatePointList();
return NS_OK;
}
