Bug 1315892 - Add a comment quoting the spec. r=me

MANUAL PUSH: Contributor didn't manage to add author information to lando + comment only follow-up.
This commit is contained in:
Emilio Cobos Álvarez 2019-09-16 09:22:44 +09:00
parent d9d30c73ad
commit 97509fc36a

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@ -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);
},