language-servers/rust-analyzer
1
0
Fork 0
mirror of https://github.com/rust-lang/rust-analyzer.git synced 2025-10-02 14:51:48 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Check for inside multibyte

Browse source
This commit is contained in:
Ariel Davis 2023-05-06 01:05:28 -07:00
parent 902b3438c9
commit 0ad2450396
1 changed files with 10 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

12
lib/line-index/src/lib.rs
View file

@ -144,12 +144,20 @@ impl LineIndex {
self.try_line_col(offset).expect("invalid offset")
}
/// Transforms the `TextSize` into a `LineCol`, or returns `None` if the `offset` was invalid.
/// Transforms the `TextSize` into a `LineCol`, or returns `None` if the `offset` was invalid,
/// e.g. if it points to the middle of a multi-byte character.
pub fn try_line_col(&self, offset: TextSize) -> Option<LineCol> {
let line = self.newlines.partition_point(|&it| it <= offset).checked_sub(1)?;
let line_start_offset = self.newlines.get(line)?;
let col = offset - line_start_offset;
Some(LineCol { line: line as u32, col: col.into() })
let ret = LineCol { line: line as u32, col: col.into() };
self.line_wide_chars
.get(&ret.line)
.into_iter()
.flat_map(|it| it.iter())
.find(|it| it.start < col && col < it.end)
.is_none()
.then_some(ret)
}
/// Transforms the `LineCol` into a `TextSize`.