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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
Notes: sideshowbarker 2024-07-16 23:34:49 +09:00 
Author: https://github.com/krkk
Commit: https://github.com/SerenityOS/serenity/commit/bf16ddfbb0
Pull-request: https://github.com/SerenityOS/serenity/pull/21668
Issue: https://github.com/SerenityOS/serenity/issues/21609
3 changed files with 32 additions and 0 deletions
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23
Tests/LibWeb/Text/input/css/transform-origin-serialization.html Normal file
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@@ -0,0 +1,23 @@
<script src="../include.js"></script>
<script>
test(() => {
function serialize(input) {
const e = document.createElement("div");
e.style.transformOrigin = input;
const serialized = e.style.transformOrigin;
println(input + " => " + (serialized === '' ? '(invalid)' : serialized));
}
for (transformOrigin of [
'center',
'10px',
'25%',
'left 20%',
'20px bottom',
'top right',
'"center"',
]) {
serialize(transformOrigin);
}
});
</script>