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LibJS: Count code-points instead of bytes for syntax highlight

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This fixes issue #1847, a crash on view-source
for https://chalmers.se
This commit is contained in:
Christoffer Sandberg 2024-10-30 21:30:27 +01:00 committed by Tim Ledbetter
parent c78c706422
commit 84c881fc66
1 changed files with 7 additions and 7 deletions
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14
Userland/Libraries/LibJS/SyntaxHighlighter.cpp
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@ -59,21 +59,21 @@ void SyntaxHighlighter::rehighlight(Palette const& palette)
Syntax::TextPosition position { 0, 0 }; Syntax::TextPosition position { 0, 0 };
Syntax::TextPosition start { 0, 0 }; Syntax::TextPosition start { 0, 0 };
auto advance_position = [&position](char ch) { auto advance_position = [&position](u32 code_point) {
if (ch == '\n') { if (code_point == '\n') {
position.set_line(position.line() + 1); position.set_line(position.line() + 1);
position.set_column(0); position.set_column(0);
} else } else
position.set_column(position.column() + 1); position.set_column(position.column() + 1);
}; };
auto append_token = [&](StringView str, Token const& token, bool is_trivia) { auto append_token = [&](Utf8View str, Token const& token, bool is_trivia) {
if (str.is_empty()) if (str.is_empty())
return; return;
start = position; start = position;
for (size_t i = 0; i < str.length(); ++i) for (auto code_point : str)
advance_position(str[i]); advance_position(code_point);
Syntax::TextDocumentSpan span; Syntax::TextDocumentSpan span;
span.range.set_start(start); span.range.set_start(start);
@ -100,10 +100,10 @@ void SyntaxHighlighter::rehighlight(Palette const& palette)
bool was_eof = false; bool was_eof = false;
for (auto token = lexer.next(); !was_eof; token = lexer.next()) { for (auto token = lexer.next(); !was_eof; token = lexer.next()) {
append_token(token.trivia(), token, true); append_token(Utf8View(token.trivia()), token, true);
auto token_start_position = position; auto token_start_position = position;
append_token(token.value(), token, false); append_token(Utf8View(token.value()), token, false);
if (token.type() == TokenType::Eof) if (token.type() == TokenType::Eof)
was_eof = true; was_eof = true;