diff options
Diffstat (limited to 'helix-core/src/line_ending.rs')
| -rw-r--r-- | helix-core/src/line_ending.rs | 64 |
1 files changed, 60 insertions, 4 deletions
diff --git a/helix-core/src/line_ending.rs b/helix-core/src/line_ending.rs index bcfecaf6..47420f9e 100644 --- a/helix-core/src/line_ending.rs +++ b/helix-core/src/line_ending.rs @@ -1,7 +1,6 @@ use crate::{Rope, RopeGraphemes, RopeSlice}; /// Represents one of the valid Unicode line endings. -/// VT, FF and PS are excluded here, as we don't expect them to show up as a default line break #[derive(PartialEq, Copy, Clone, Debug)] pub enum LineEnding { Crlf, // CarriageReturn followed by LineFeed @@ -9,6 +8,9 @@ pub enum LineEnding { CR, // U+000D -- CarriageReturn Nel, // U+0085 -- NextLine LS, // U+2028 -- Line Separator + VT, // U+000B -- VerticalTab + FF, // U+000C -- FormFeed + PS, // U+2029 -- ParagraphSeparator } pub fn rope_slice_to_line_ending(g: &RopeSlice) -> Option<LineEnding> { @@ -38,8 +40,8 @@ pub fn auto_detect_line_ending(doc: &Rope) -> Option<LineEnding> { // based on https://github.com/cessen/led/blob/27572c8838a1c664ee378a19358604063881cc1d/src/editor/mod.rs#L88-L162 let mut ending = None; - for line in doc.lines().take(1) { - // check first line only - unsure how sound this is + // return first matched line ending. Not all possible line endings are being matched, as they might be special-use only + for line in doc.lines().take(100) { ending = match line.len_chars() { 1 => { let g = RopeGraphemes::new(line.slice((line.len_chars() - 1)..)) @@ -54,6 +56,9 @@ pub fn auto_detect_line_ending(doc: &Rope) -> Option<LineEnding> { rope_slice_to_line_ending(&g) } _ => None, + }; + if ending.is_some() { + return ending; } } ending @@ -62,4 +67,55 @@ pub fn auto_detect_line_ending(doc: &Rope) -> Option<LineEnding> { #[cfg(target_os = "windows")] pub const DEFAULT_LINE_ENDING: LineEnding = LineEnding::Crlf; #[cfg(not(target_os = "windows"))] -pub const DEFAULT_LINE_ENDING: LineEnding = LineEnding::LF;
\ No newline at end of file +pub const DEFAULT_LINE_ENDING: LineEnding = LineEnding::LF; + +#[cfg(test)] +mod line_ending_tests { + use super::*; + + #[test] + fn test_autodetect() { + assert_eq!( + auto_detect_line_ending(&Rope::from_str("\n")), + Some(LineEnding::LF) + ); + assert_eq!( + auto_detect_line_ending(&Rope::from_str("\r\n")), + Some(LineEnding::Crlf) + ); + assert_eq!(auto_detect_line_ending(&Rope::from_str("hello")), None); + assert_eq!(auto_detect_line_ending(&Rope::from_str("")), None); + assert_eq!( + auto_detect_line_ending(&Rope::from_str("hello\nhelix\r\n")), + Some(LineEnding::LF) + ); + assert_eq!( + auto_detect_line_ending(&Rope::from_str("a formfeed\u{000C}")), + None + ); + assert_eq!( + auto_detect_line_ending(&Rope::from_str("\n\u{000A}\n \u{000A}")), + Some(LineEnding::LF) + ); + assert_eq!( + auto_detect_line_ending(&Rope::from_str( + "a formfeed\u{000C} with a\u{000C} linefeed\u{000A}" + )), + Some(LineEnding::LF) + ); + assert_eq!(auto_detect_line_ending(&Rope::from_str("a formfeed\u{000C} with a\u{000C} carriage return linefeed\u{000D}\u{000A} and a linefeed\u{000A}")), Some(LineEnding::Crlf)); + } + + #[test] + fn test_rope_slice_to_line_ending() { + let r = Rope::from_str("\r\n"); + assert_eq!( + rope_slice_to_line_ending(&r.slice(1..2)), + Some(LineEnding::LF) + ); + assert_eq!( + rope_slice_to_line_ending(&r.slice(0..2)), + Some(LineEnding::Crlf) + ); + } +} |