style: Add a comment quoting the spec.

This commit is contained in:
Emilio Cobos Álvarez 2019-09-16 09:22:44 +09:00
parent 8798549beb
commit 35a98af0ed

View file

@ -140,6 +140,13 @@ impl WritingMode {
TextOrientation::Mixed => {},
TextOrientation::Upright => {
flags.insert(WritingMode::UPRIGHT);
// https://drafts.csswg.org/css-writing-modes-3/#valdef-text-orientation-upright:
//
// > This value causes the used value of direction
// > to be ltr, and for the purposes of bidi
// > reordering, causes all characters to be treated
// > as strong LTR.
flags.remove(WritingMode::RTL);
flags.remove(WritingMode::INLINE_REVERSED);
},