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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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7
Tests/LibWeb/Text/expected/css/transform-origin-serialization.txt Normal file
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@ -0,0 +1,7 @@
center => 50% 50%
10px => 10px 50%
25% => 25% 50%
left 20% => 0% 20%
20px bottom => 20px 100%
top right => 100% 0%
"center" => (invalid)