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LibWeb: Bail parsing transform-origin if the parsed value is null

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Passing a value of a type different than number or length-percentage
to transform-origin returned a null pointer, and we didn't take care
of that path before.

This patch fixes a crash caused by an incorrect CSS declaration, such as
`transform-origin: "center"`.

Fixes #21609
This commit is contained in:
Karol Kosek 2023-10-29 07:58:15 +01:00 • committed by Andreas Kling
parent d22aa851cf
commit bf16ddfbb0
3 changed files with 32 additions and 0 deletions
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2
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -5008,6 +5008,8 @@ RefPtr<StyleValue> Parser::parse_transform_origin_value(Vector<ComponentValue> c
};
auto to_axis_offset = [](RefPtr<StyleValue> value) -> Optional<AxisOffset> {
if (!value)
return OptionalNone {};
if (value->is_percentage())
return AxisOffset { Axis::None, value->as_percentage() };
if (value->is_length())