[Webkit-unassigned] [Bug 279217] New: text-emphasis-position default for vertical typographic modes is wrong

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=279217

            Bug ID: 279217
           Summary: text-emphasis-position default for vertical
                    typographic modes is wrong
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
               URL: https://software.hixie.ch/utilities/js/live-dom-viewer
                    /?%3C!DOCTYPE%20html%3E%0A%3Chtml%20style%3D%22writing
                    -mode%3A%20vertical-rl%22%3E%0A%3Cstyle%3Eem%20%7B%20t
                    ext-emphasis%3A%20dot%3B%20%7D%3C%2Fstyle%3E%0A%3Cp%20
                    style%3D%22text-emphasis-position%3A%20under%22%3E%3Ce
                    m%3Eunder%3C%2Fem%3E%20%3D%20right%3C%2Fp%3E%0A%3Cp%20
                    style%3D%22text-emphasis-position%3A%20over%22%3E%3Cem
                    %3Eunder%3C%2Fem%3E%20%3D%20right%3C%2Fp%3E%0A%3Cp%20s
                    tyle%3D%22text-emphasis-position%3A%20left%20under%22%
                    3E%3Cem%3Eleft%20under%3C%2Fem%3E%20%3D%20left%3C%2Fp%
                    3E%0A%3Cp%20style%3D%22text-emphasis-position%3A%20rig
                    ht%20under%22%3E%3Cem%3Eright%20under%3C%2Fem%3E%20%3D
                    %20right%3C%2Fp%3E%0A%3Cp%20style%3D%22text-emphasis-p
                    osition%3A%20left%20over%22%3E%3Cem%3Eleft%20over%3C%2
                    Fem%3E%20%3D%20left%3C%2Fp%3E%0A%3Cp%20style%3D%22text
                    -emphasis-position%3A%20right%20over%22%3E%3Cem%3Erigh
                    t%20over%3C%2Fem%3E%20%3D%20right%3C%2Fp%3E
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fantasai.bugs at inkedblade.net
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

https://www.w3.org/TR/css-text-decor-4/#text-emphasis-position-property
> If [ right | left ] is omitted, it defaults to right.

We currently interpret over/under as for sideways writing modes instead of defaulting to right. See testcase.

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