beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-25 00:50:22 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

LibWeb: Use UTF-16 code units length in CharacterData::replace_data()
Some checks are pending
CI / Lagom (false, FUZZ, ubuntu-24.04, Linux, Clang) (push) Waiting to run
Details
CI / Lagom (false, NO_FUZZ, macos-14, macOS, Clang) (push) Waiting to run
Details
CI / Lagom (false, NO_FUZZ, ubuntu-24.04, Linux, GNU) (push) Waiting to run
Details
CI / Lagom (true, NO_FUZZ, ubuntu-24.04, Linux, Clang) (push) Waiting to run
Details
Package the js repl as a binary artifact / build-and-package (macos-14, macOS, macOS-universal2) (push) Waiting to run
Details
Package the js repl as a binary artifact / build-and-package (ubuntu-24.04, Linux, Linux-x86_64) (push) Waiting to run
Details
Run test262 and test-wasm / run_and_update_results (push) Waiting to run
Details
Lint Code / lint (push) Waiting to run
Details
Push notes / build (push) Waiting to run
Details

Browse source 
Range API uses UTF-16 code units to represent offsets, so replace_data()
needs to use it instead of bytes count while calculating new offsets.

Fixes incorrectly thrown exception when non-latin string is passed into
replace_data().
This commit is contained in:
Aliaksandr Kalenik 2024-11-06 04:26:56 +01:00 committed by Tim Ledbetter
parent f7dfe03cf6
commit 42b31820a6
Notes: github-actions[bot] 2024-11-06 05:47:30 +00:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/LadybirdBrowser/ladybird/commit/42b31820a65
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2187
Reviewed-by: https://github.com/shannonbooth
Reviewed-by: https://github.com/tcl3 ✅
3 changed files with 18 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
Tests/LibWeb/Text/expected/text-insertData.txt Normal file
View file

@ -0,0 +1 @@
=Привет=

13
Tests/LibWeb/Text/input/text-insertData.html Normal file
View file

@ -0,0 +1,13 @@
<!DOCTYPE html>
<script src="include.js"></script>
<div id="text">==</div>
<script>
test(() => {
const text = document.getElementById("text");
const range = document.createRange();
range.setStart(text.firstChild, 0);
range.setEnd(text.firstChild, text.firstChild.length);
text.firstChild.insertData(1, "Привет");
println(range.toString());
});
</script>

6
Userland/Libraries/LibWeb/DOM/CharacterData.cpp
View file

@ -72,6 +72,8 @@ WebIDL::ExceptionOr<void> CharacterData::replace_data(size_t offset, size_t coun
Utf16View utf16_view { utf16_data };
auto length = utf16_view.length_in_code_units();
auto inserted_data_length_in_utf16_code_units = AK::utf16_code_unit_length_from_utf8(data);
// 2. If offset is greater than length, then throw an "IndexSizeError" DOMException.
if (offset > length)
return WebIDL::IndexSizeError::create(realm(), "Replacement offset out of range."_string);
@ -107,14 +109,14 @@ WebIDL::ExceptionOr<void> CharacterData::replace_data(size_t offset, size_t coun
// 10. For each live range whose start node is node and start offset is greater than offset plus count, increase its start offset by data’s length and decrease it by count.
for (auto& range : Range::live_ranges()) {
if (range->start_container() == this && range->start_offset() > (offset + count))
TRY(range->set_start(*range->start_container(), range->start_offset() + data.bytes().size() - count));
TRY(range->set_start(*range->start_container(), range->start_offset() + inserted_data_length_in_utf16_code_units - count));
}
// 11. For each live range whose end node is node and end offset is greater than offset plus count, increase its end offset by data’s length and decrease it by count.
for (auto& range : Range::live_ranges()) {
if (range->end_container() == this && range->end_offset() > (offset + count)) {
// AD-HOC: Clamp offset to the end of the data if it's too large.
auto new_offset = min(range->end_offset() + data.bytes().size() - count, m_data.bytes().size());
auto new_offset = min(range->end_offset() + inserted_data_length_in_utf16_code_units - count, length_in_utf16_code_units());
TRY(range->set_end(*range->end_container(), new_offset));
}
}