Mirrors/rust-analyzer
2
0
Fork 0
mirror of https://github.com/rust-lang/rust-analyzer synced 2025-01-14 14:13:58 +00:00
Code Issues Projects Releases Packages Wiki Activity

Use try_line_col

Browse source
This commit is contained in:
Ariel Davis 2023-05-06 01:04:41 -07:00
parent d683e22021
commit 902b3438c9
1 changed files with 8 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
lib/line-index/src/lib.rs
View file

@ -141,10 +141,15 @@ impl LineIndex {
///
/// If the offset is invalid.
pub fn line_col(&self, offset: TextSize) -> LineCol {
let line = self.newlines.partition_point(|&it| it <= offset) - 1;
let line_start_offset = self.newlines[line];
self.try_line_col(offset).expect("invalid offset")
}
/// Transforms the `TextSize` into a `LineCol`, or returns `None` if the `offset` was invalid.
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;
LineCol { line: line as u32, col: col.into() }
Some(LineCol { line: line as u32, col: col.into() })
}
/// Transforms the `LineCol` into a `TextSize`.