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https://github.com/LadybirdBrowser/ladybird
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15741350ba
When inserting a new utf-16 surrogate next to an existing surrogate with replaceData, the surrogates would not get merged correctly into a single code point. This is because internally the text data is stored as utf-8, and the two surrogates would be converted seperately. This has now been fixed by first recreating the whole string in utf-16 and then converting it back to utf-8. It's not the most efficient solution, but this fixes at least 6 WPT subtests.
75 lines
2.4 KiB
HTML
75 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>Splitting and joining surrogate pairs in CharacterData methods</title>
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<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-substringdata">
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<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-replacedata">
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<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-insertdata">
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<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-deletedata">
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<link rel=help href="https://dom.spec.whatwg.org/#dom-characterdata-data">
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<script src="../../resources/testharness.js"></script>
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<script src="../../resources/testharnessreport.js"></script>
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<div id="log"></div>
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<script>
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function testNode(create, type) {
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test(function() {
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var node = create()
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assert_equals(node.data, "test")
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node.data = "🌠 test 🌠 TEST"
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assert_equals(node.substringData(1, 8), "\uDF20 test \uD83C")
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}, type + ".substringData() splitting surrogate pairs")
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test(function() {
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var node = create()
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assert_equals(node.data, "test")
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node.data = "🌠 test 🌠 TEST"
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node.replaceData(1, 4, "--");
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assert_equals(node.data, "\uD83C--st 🌠 TEST");
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node.replaceData(1, 2, "\uDF1F ");
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assert_equals(node.data, "🌟 st 🌠 TEST");
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node.replaceData(5, 2, "---");
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assert_equals(node.data, "🌟 st---\uDF20 TEST");
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node.replaceData(6, 2, " \uD83D");
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assert_equals(node.data, "🌟 st- 🜠 TEST");
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}, type + ".replaceData() splitting and creating surrogate pairs")
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test(function() {
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var node = create()
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assert_equals(node.data, "test")
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node.data = "🌠 test 🌠 TEST"
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node.deleteData(1, 4);
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assert_equals(node.data, "\uD83Cst 🌠 TEST");
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node.deleteData(1, 4);
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assert_equals(node.data, "🌠 TEST");
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}, type + ".deleteData() splitting and creating surrogate pairs")
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test(function() {
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var node = create()
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assert_equals(node.data, "test")
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node.data = "🌠 test 🌠 TEST"
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node.insertData(1, "--");
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assert_equals(node.data, "\uD83C--\uDF20 test 🌠 TEST");
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node.insertData(1, "\uDF1F ");
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assert_equals(node.data, "🌟 --\uDF20 test 🌠 TEST");
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node.insertData(5, " \uD83D");
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assert_equals(node.data, "🌟 -- 🜠 test 🌠 TEST");
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}, type + ".insertData() splitting and creating surrogate pairs")
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}
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testNode(function() { return document.createTextNode("test") }, "Text")
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testNode(function() { return document.createComment("test") }, "Comment")
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</script>
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