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Implement the latest select parsing changes #3317

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Implement the latest select parsing changes #3317

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flavorjones
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@flavorjones flavorjones commented Oct 16, 2024 •
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What problem is this PR intended to solve?

In whatwg/html#10557 there are some changes being made to how <select> tags are parsed.

Have you included adequate test coverage?

Tests are under development on a branch at html5lib/html5lib-tests#178

Does this change affect the behavior of either the C or the Java implementations?

HTML5 is only supported by the C impl.

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@flavorjones flavorjones mentioned this pull request Oct 16, 2024
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@flavorjones flavorjones force-pushed the flavorjones-html5-relaxed-select branch from 3cefda2 to eb62613 Compare October 16, 2024 19:45
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Ugh, sorry about that -- PEBKAC -- I just needed to force-recompile and that particular test is passing. There are other ones that I'll look into now.

@stevecheckoway
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I see that whatwg/html PR has had a bunch of changes since I last looked at it. I can take a look at this PR in more detail next week.

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flavorjones commented Oct 16, 2024 •
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@stevecheckoway Thanks. Actually, my changes look pretty good! Only two tests are failing for non-error-message reasons, and they're both very similar. (This PR is using a fixed-up version of html5lib/html5lib-tests#178 with appropriate error messages.)

Zooming in on the simpler of the two (CI failure here):

#data
<select><b><option><select><option></b></select>
#errors
#document
| <html>
|   <head>
|   <body>
|     <select>
|       <b>
|         <option>
|     <b>
|     <select>
|       <b>
|         <option>

This pr results in the following tree:

<body>
  <select>
    <b>
      <option>
  <b>
    <select>
      <option>

so I wanted to double check if I've missed something or if these tests are incorrect.

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@stevecheckoway Before you dig in on this, please catch up on the chat I'm having upstream in html5lib/html5lib-tests#178, TLDR I think I'm right and the test (and chromium) are wrong.

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Updated the gumbo tests.

Note that these changes break rails-html-sanitizer, I'll need to work a bit upstream before these changes are safe to merge and release.

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@flavorjones @stevecheckoway