bool ParseTransformOrigin(bool aPerspective)
{
var position = new nsCSSValuePair();
if (!ParseBoxPositionValues(ref position, true))
return false;
nsCSSProperty prop = nsCSSProperty.TransformOrigin;
if (aPerspective) {
if (!ExpectEndProperty()) {
return false;
}
prop = nsCSSProperty.PerspectiveOrigin;
}
// Unlike many other uses of pairs, this position should always be stored
// as a pair, even if the values are the same, so it always serializes as
// a pair, and to keep the computation code simple.
if (position.mXValue.GetUnit() == nsCSSUnit.Inherit ||
position.mXValue.GetUnit() == nsCSSUnit.Initial) {
Debug.Assert(position.mXValue == position.mYValue,
"inherit/initial only half?");
AppendValue(prop, position.mXValue);
} else {
var value = new nsCSSValue();
if (aPerspective) {
value.SetPairValue(position.mXValue, position.mYValue);
} else {
var depth = new nsCSSValue();
if (!nsLayoutUtils.Are3DTransformsEnabled() ||
// only try parsing if 3-D transforms are enabled
!ParseVariant(ref depth, VARIANT_LENGTH | VARIANT_CALC, null)) {
depth.SetFloatValue(0.0f, nsCSSUnit.Pixel);
}
value.SetTripletValue(position.mXValue, position.mYValue, depth);
}
AppendValue(prop, value);
}
return true;
}