[Webkit-unassigned] [Bug 238356] [css-cascade] "related-property" logic for (-webkit-)text-orientation is broken

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=238356

Oriol Brufau <obrufau at igalia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|webkit-unassigned at lists.web |obrufau at igalia.com
                   |kit.org                     |

--- Comment #1 from Oriol Brufau <obrufau at igalia.com> ---
For revert-layer this implies a problem like bug 238125 (but it would need to be addressed in a different way). This example is not upright:

  @layer { div { writing-mode: vertical-lr; text-orientation: upright; } }
  @layer { div { -webkit-text-orientation: revert-layer; } }

And CSSOM is also broken:

  CSS.supports("text-orientation", "sideways-right"); // false
  document.body.style.webkitTextOrientation = "sideways-right";
  document.body.style.textOrientation; // "sideways-right" !!! invalid value

Since the only difference between these properties is that -webkit-text-orientation accepts sideways-right, but this value always computes to sideways, I would:

 1. Make -webkit-text-orientation an shorthand of text-orientation
 2. Alias sideways-right into sideways at parse time

This is similar to the example in the spec https://drafts.csswg.org/css-cascade/#legacy-shorthand, which says that page-break-before:always expands to break-before:page at parse time.

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