nsSMILTimeValue
nsSMILTimeValueSpec::ConvertBetweenTimeContainers(
const nsSMILTimeValue& aSrcTime,
const nsSMILTimeContainer* aSrcContainer)
{
// If the source time is either indefinite or unresolved the result is going
// to be the same
if (!aSrcTime.IsDefinite())
return aSrcTime;
// Convert from source time container to our parent time container
const nsSMILTimeContainer* dstContainer = mOwner->GetTimeContainer();
if (dstContainer == aSrcContainer)
return aSrcTime;
// If one of the elements is not attached to a time container then we can't do
// any meaningful conversion
if (!aSrcContainer || !dstContainer)
return nsSMILTimeValue(); // unresolved
nsSMILTimeValue docTime =
aSrcContainer->ContainerToParentTime(aSrcTime.GetMillis());
if (docTime.IsIndefinite())
// This will happen if the source container is paused and we have a future
// time. Just return the indefinite time.
return docTime;
NS_ABORT_IF_FALSE(docTime.IsDefinite(),
"ContainerToParentTime gave us an unresolved or indefinite time");
return dstContainer->ParentToContainerTime(docTime.GetMillis());
}
bool
nsSMILTimeValueSpec::ApplyOffset(nsSMILTimeValue& aTime) const
{
// indefinite + offset = indefinite. Likewise for unresolved times.
if (!aTime.IsDefinite()) {
return true;
}
double resultAsDouble =
(double)aTime.GetMillis() + mParams.mOffset.GetMillis();
if (resultAsDouble > std::numeric_limits<nsSMILTime>::max() ||
resultAsDouble < std::numeric_limits<nsSMILTime>::min()) {
return false;
}
aTime.SetMillis(aTime.GetMillis() + mParams.mOffset.GetMillis());
return true;
}