[Meta] CSS Writing Modes

[SimonSapin]

Tracking issue. http://dev.w3.org/csswg/css-writing-modes/

[SimonSapin]

Abstract dimension geometry.

Mailing list discussion: https://groups.google.com/forum/#!topic/mozilla.dev.servo/HfNwjucmdys
Initial commit: https://github.com/SimonSapin/servo/compare/d6caf26
Branch: https://github.com/SimonSapin/servo/compare/abstract-geometry
Relevant spec: http://dev.w3.org/csswg/css-writing-modes/#abstract-box

[Gankra]

upstream webrender work just landed: servo/webrender#2288

[Gankra]

(well bors is throwing a fit but, you know)

[tigercosmos]

@SimonSapin So do we still have not implement writing-mode yet?

[SimonSapin]

We do have some support behind the layout.writing-mode.enabled pref. But it’s buggy, in particular orthogonal flows (a change of horizontal v.s. vertical direction in the same document) are very broken.