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-rw-r--r--helix-view/src/commands.rs37
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);
}