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-rw-r--r--helix-view/src/document.rs77
1 files changed, 74 insertions, 3 deletions
diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index a1c4b407..8b735b9d 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -8,7 +8,7 @@ use helix_core::{
chars::{char_is_linebreak, char_is_whitespace},
history::History,
syntax::{LanguageConfiguration, LOADER},
- ChangeSet, Diagnostic, Rope, Selection, State, Syntax, Transaction,
+ ChangeSet, Diagnostic, History, Rope, RopeSlice, RopeGraphemes, Selection, State, Syntax, Transaction,
};
use crate::{DocumentId, ViewId};
@@ -22,12 +22,28 @@ pub enum Mode {
Insert,
}
+
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum IndentStyle {
Tabs,
Spaces(u8),
}
+/// Represents one of the valid Unicode line endings.
+/// Also acts as an index into `LINE_ENDINGS`.
+#[derive(PartialEq, Copy, Clone, Debug)]
+pub enum LineEnding {
+ None = 0, // No line ending
+ CRLF = 1, // CarriageReturn followed by LineFeed
+ LF = 2, // U+000A -- LineFeed
+ VT = 3, // U+000B -- VerticalTab
+ FF = 4, // U+000C -- FormFeed
+ CR = 5, // U+000D -- CarriageReturn
+ NEL = 6, // U+0085 -- NextLine
+ LS = 7, // U+2028 -- Line Separator
+ PS = 8, // U+2029 -- ParagraphSeparator
+}
+
pub struct Document {
// rope + selection
pub(crate) id: DocumentId,
@@ -61,6 +77,7 @@ pub struct Document {
diagnostics: Vec<Diagnostic>,
language_server: Option<Arc<helix_lsp::Client>>,
+ line_ending: LineEnding
}
use std::fmt;
@@ -146,11 +163,61 @@ pub fn canonicalize_path(path: &Path) -> std::io::Result<PathBuf> {
std::env::current_dir().map(|current_dir| normalize_path(&current_dir.join(path)))
}
+pub fn auto_detect_line_ending(doc: &Rope) -> LineEnding {
+ // based on https://github.com/cessen/led/blob/27572c8838a1c664ee378a19358604063881cc1d/src/editor/mod.rs#L88-L162
+
+ let mut ending = LineEnding::None;
+ for line in doc.lines().take(1) { // check first line only - unsure how sound this is
+ // Get the line ending
+ ending = if line.len_chars() == 1 {
+ let g = RopeGraphemes::new(line.slice((line.len_chars() - 1)..))
+ .last()
+ .unwrap();
+ rope_slice_to_line_ending(&g)
+ } else if line.len_chars() > 1 {
+ let g = RopeGraphemes::new(line.slice((line.len_chars() - 2)..))
+ .last()
+ .unwrap();
+ rope_slice_to_line_ending(&g)
+ } else {
+ LineEnding::None
+ };
+ }
+ ending
+}
+
+pub fn rope_slice_to_line_ending(g: &RopeSlice) -> LineEnding {
+ if let Some(text) = g.as_str() {
+ str_to_line_ending(text)
+ } else if g == "\u{000D}\u{000A}" {
+ LineEnding::CRLF
+ } else {
+ // Not a line ending
+ LineEnding::None
+ }
+}
+
+pub fn str_to_line_ending(g: &str) -> LineEnding {
+ match g {
+ "\u{000D}\u{000A}" => LineEnding::CRLF,
+ "\u{000A}" => LineEnding::LF,
+ "\u{000B}" => LineEnding::VT,
+ "\u{000C}" => LineEnding::FF,
+ "\u{000D}" => LineEnding::CR,
+ "\u{0085}" => LineEnding::NEL,
+ "\u{2028}" => LineEnding::LS,
+ "\u{2029}" => LineEnding::PS,
+
+ // Not a line ending
+ _ => LineEnding::None,
+ }
+}
+
use helix_lsp::lsp;
use url::Url;
impl Document {
- pub fn new(text: Rope) -> Self {
+ pub fn new(text: Rope, line_ending: LineEnding) -> Self {
let changes = ChangeSet::new(&text);
let old_state = None;
@@ -171,6 +238,7 @@ impl Document {
history: Cell::new(History::default()),
last_saved_revision: 0,
language_server: None,
+ line_ending: line_ending
}
}
@@ -190,7 +258,10 @@ impl Document {
doc
};
- let mut doc = Self::new(doc);
+ // search for line endings
+ let line_ending = auto_detect_line_ending(&doc);
+
+ let mut doc = Self::new(doc, line_ending);
// set the path and try detecting the language
doc.set_path(&path)?;
doc.detect_indent_style();