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;
}
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;
}
void
DOMSVGPathSegList::Clear(ErrorResult& aError)
{
if (IsAnimValList()) {
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
if (LengthNoFlush() > 0) {
nsAttrValue emptyOrOldValue = Element()->WillChangePathSegList();
// DOM list items that are to be removed must be removed before we change
// the internal list, otherwise they wouldn't be able to copy their
// internal counterparts' values!
InternalListWillChangeTo(SVGPathData()); // clears mItems
if (!AttrIsAnimating()) {
// The anim val list is in sync with the base val list
DOMSVGPathSegList *animList =
GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
if (animList) {
animList->InternalListWillChangeTo(SVGPathData()); // clears its mItems
}
}
InternalList().Clear();
Element()->DidChangePathSegList(emptyOrOldValue);
if (AttrIsAnimating()) {
Element()->AnimationNeedsResample();
}
}
}
NS_IMETHODIMP
DOMSVGPathSegList::Clear()
{
if (IsAnimValList()) {
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
if (Length() > 0) {
// DOM list items that are to be removed must be removed before we change
// the internal list, otherwise they wouldn't be able to copy their
// internal counterparts' values!
InternalListWillChangeTo(SVGPathData()); // clears mItems
if (!AttrIsAnimating()) {
// The anim val list is in sync with the base val list
DOMSVGPathSegList *animList =
GetDOMWrapperIfExists(InternalAList().GetAnimValKey());
if (animList) {
animList->InternalListWillChangeTo(SVGPathData()); // clears its mItems
}
}
InternalList().Clear();
Element()->DidChangePathSegList(PR_TRUE);
#ifdef MOZ_SMIL
if (AttrIsAnimating()) {
Element()->AnimationNeedsResample();
}
#endif
}
return NS_OK;
}
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
}
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();
}