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LibWeb/CSS: Parse @font-face descriptors as style values

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CSSFontFaceRule now stores its values as a CSSFontFaceDescriptors, with
a ParsedFontFace produced on request. This is exposed via the `style`
attribute, so we pass a lot of tests that try to read values from
that.

We have one test regression, which we passed by mistake before: The test
wanted to ensure we don't allow `@font-face` nested inside other rules.
We passed it just because we discarded any `@font-face` without a
`font-family`. What we're supposed to do is 1) keep at-rules with
missing required descriptors and just not use them, and 2) reject
certain ones when nested.

We may want to cache the ParsedFontFace in the future, but I didn't here
because 1) it's called rarely, and 2) that would mean knowing to
invalidate it when the CSSFontFaceDescriptors changes, which isn't
obvious to me right now.
This commit is contained in:
Sam Atkins 2025-04-03 12:05:49 +01:00
parent 3c9685ff1a
commit f87b454fa9
Notes: github-actions[bot] 2025-04-04 09:41:41 +00:00
12 changed files with 118 additions and 378 deletions
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2
Libraries/LibWeb/Dump.cpp
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@ -701,7 +701,7 @@ void dump_rule(StringBuilder& builder, CSS::CSSRule const& rule, int indent_leve
void dump_font_face_rule(StringBuilder& builder, CSS::CSSFontFaceRule const& rule, int indent_levels)
{
auto& font_face = rule.font_face();
auto const font_face = rule.font_face();
indent(builder, indent_levels + 1);
builder.appendff("font-family: {}\n", font_face.font_family());