diff options
| -rw-r--r-- | helix-view/src/commands.rs | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/helix-view/src/commands.rs b/helix-view/src/commands.rs index 56e1c5db..d131fbb3 100644 --- a/helix-view/src/commands.rs +++ b/helix-view/src/commands.rs @@ -543,7 +543,7 @@ pub fn paste(view: &mut View, _count: usize) { const TAB_WIDTH: usize = 4; -pub fn indent(view: &mut View, _count: usize) { +fn get_lines(view: &View) -> Vec<usize> { let mut lines = Vec::new(); // Get all line numbers @@ -557,6 +557,11 @@ pub fn indent(view: &mut View, _count: usize) { } lines.sort_unstable(); // sorting by usize so _unstable is preferred lines.dedup(); + lines +} + +pub fn indent(view: &mut View, _count: usize) { + let lines = get_lines(view); // Indent by one level let indent = Tendril::from(" ".repeat(TAB_WIDTH)); @@ -573,5 +578,33 @@ pub fn indent(view: &mut View, _count: usize) { } pub fn unindent(view: &mut View, _count: usize) { - unimplemented!() + let lines = get_lines(view); + let mut changes = Vec::with_capacity(lines.len()); + + for line_idx in lines { + let line = view.state.doc.line(line_idx); + let mut width = 0; + + for ch in line.chars() { + match ch { + ' ' => width += 1, + '\t' => width = (width / TAB_WIDTH + 1) * TAB_WIDTH, + _ => break, + } + + if width >= TAB_WIDTH { + break; + } + } + + if width > 0 { + let start = view.state.doc.line_to_char(line_idx); + changes.push((start, start + width, None)) + } + } + + let transaction = Transaction::change(&view.state, changes.into_iter()); + + transaction.apply(&mut view.state); + append_changes_to_history(view); } |