[Webkit-unassigned] [Bug 236272] New: [css] Can't revert low-priority properties like text-decoration

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=236272

            Bug ID: 236272
           Summary: [css] Can't revert low-priority properties like
                    text-decoration
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: obrufau at igalia.com
            Blocks: 236199

Created attachment 451172

  --> https://bugs.webkit.org/attachment.cgi?id=451172&action=review

testcase

All of these should look identical:

  <u style="all: revert">foo</u>
  <u style="text-decoration: revert">foo</u>
  <u style="all: revert-layer">foo</u>
  <u style="text-decoration: revert-layer">foo</u>
  <u>foo</u>

But only the last one has the underline set in UA origin.

That's because text-decoration is low-priority / deferred / applied in parse order.
`revert` and `revert-layer` don't seem to work on these properties:
https://webkit-search.igalia.com/webkit/rev/30ea950a1b2947097300016afbe68f78665b0e43/Source/WebCore/style/PropertyCascade.cpp#41-73


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=236199
[Bug 236199] [css-logical] changing the writing-mode via a CSS variable does not update the physical properties
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