Sam Atkins b3ad4be90c LibWeb/CSS: Ensure properties can be computed from "basic" StyleValues ...

This commit modifies the `compute_foo()` code for `font-style` and
`math-depth`. They previously assumed that their StyleValue was always
a special kind: FontStyleStyleValue or MathDepthStyleValue. This was
always true, because that's how we parse them, but it stops being true
once StylePropertyMap is involved: An author can set font-style to a
CSSKeywordValue of "italic", and this should work.

There are multiple ways that we could solve this, but the simplest and
easiest to maintain seems to be to handle those more basic StyleValues
in this computation code. Going forward, we'll have to be aware that
similar properties could have a basic StyleValue from the typed-OM
instead of the property-specific one we'd expect.

2025-10-04 22:57:00 +02:00

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