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LibWeb: Allow splitting surrogate pairs in CharacterData.replaceData()

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We're expected to handle this situation gracefully, and certainly not
by falling apart like we were.

Found by Domato.
This commit is contained in:
Andreas Kling
2024-07-19 20:02:14 +02:00
committed by Andreas Kling
parent 416c478876
commit 33207174a9
Notes: github-actions[bot] 2024-07-20 04:41:59 +00:00 
Author: https://github.com/awesomekling 🔰
Commit: https://github.com/LadybirdBrowser/ladybird/commit/33207174a9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/721
3 changed files with 23 additions and 2 deletions
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16
Tests/LibWeb/Text/input/DOM/CharacterData-replaceData-break-surrogate-pair.html Normal file
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@@ -0,0 +1,16 @@
<script src="../include.js"></script>
<script>
test(() => {
const str = '\uD2ED\uDEA6';
let t = document.createTextNode(str);
println("Before replaceData:");
for (let i = 0; i < t.length; ++i) {
println("[" + i + "]: " + t.data.charCodeAt(i));
}
t.replaceData(0, 1, '')
println("After replaceData:");
for (let i = 0; i < t.length; ++i) {
println("[" + i + "]: " + t.data.charCodeAt(i));
}
});
</script>