diff options
Diffstat (limited to 'helix-core/src/line_ending.rs')
| -rw-r--r-- | helix-core/src/line_ending.rs | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/helix-core/src/line_ending.rs b/helix-core/src/line_ending.rs index f9d67b57..423f4b92 100644 --- a/helix-core/src/line_ending.rs +++ b/helix-core/src/line_ending.rs @@ -14,7 +14,7 @@ pub enum LineEnding { } impl LineEnding { - pub fn len(&self) -> usize { + pub fn len_chars(&self) -> usize { match self { Self::Crlf => 2, _ => 1, @@ -28,10 +28,9 @@ impl LineEnding { Self::Nel => "\u{0085}", Self::LS => "\u{2028}", Self::CR => "\u{000D}", - _ => panic!( - "Unexpected line ending: {:?}, expected Crlf, LF, CR, Nel, or LS.", - self - ), + Self::VT => "\u{000B}", + Self::FF => "\u{000C}", + Self::PS => "\u{2029}", } } } @@ -93,6 +92,20 @@ pub fn auto_detect_line_ending(doc: &Rope) -> Option<LineEnding> { ending } +/// Returns the passed line's line ending, if any. +pub fn get_line_ending(line: &RopeSlice) -> Option<LineEnding> { + // Last character as str. + let g1 = line.slice(line.len_chars().saturating_sub(1)..).as_str().unwrap(); + + // Last two characters as str, or empty str if they're not contiguous. + // It's fine to punt on the non-contiguous case, because Ropey guarantees + // that CRLF is always contiguous. + let g2 = line.slice(line.len_chars().saturating_sub(2)..).as_str().unwrap_or(""); + + // First check the two-character case for CRLF, then check the single-character case. + str_to_line_ending(g2).or_else(|| str_to_line_ending(g1)) +} + #[cfg(target_os = "windows")] pub const DEFAULT_LINE_ENDING: LineEnding = LineEnding::Crlf; #[cfg(not(target_os = "windows"))] |