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-rw-r--r--helix-core/src/commands.rs53
1 files changed, 50 insertions, 3 deletions
diff --git a/helix-core/src/commands.rs b/helix-core/src/commands.rs
index 860ec1cb..836667a1 100644
--- a/helix-core/src/commands.rs
+++ b/helix-core/src/commands.rs
@@ -1,5 +1,5 @@
use crate::graphemes;
-use crate::selection::Range;
+use crate::selection::{Range, Selection};
use crate::state::{Direction, Granularity, Mode, State};
use crate::transaction::{ChangeSet, Transaction};
use crate::Tendril;
@@ -62,8 +62,55 @@ pub fn append_mode(state: &mut State, _count: usize) {
// I inserts at the start of each line with a selection
// A inserts at the end of each line with a selection
-// o inserts a new line before each line with a selection
-// O inserts a new line after each line with a selection
+
+// o inserts a new line after each line with a selection
+pub fn open_below(state: &mut State, _count: usize) {
+ state.mode = Mode::Insert;
+
+ // calculate line numbers for each selection range
+ let mut lines = state
+ .selection
+ .ranges()
+ .iter()
+ .map(|range| state.doc.char_to_line(range.head))
+ .collect::<Vec<_>>();
+
+ lines.sort();
+ lines.dedup();
+
+ let positions: Vec<_> = lines
+ .into_iter()
+ .map(|index| {
+ // adjust all positions to the end of the line.
+ let line = state.doc.line(index);
+ let line_start = state.doc.line_to_char(index);
+ line_start + line.len_chars()
+ })
+ .collect();
+
+ let changes = positions.iter().copied().map(|index|
+ // generate changes
+ (index, index, Some(Tendril::from_char('\n'))));
+
+ // TODO: count actually inserts "n" new lines and starts editing on all of them.
+ // TODO: append "count" newlines and modify cursors to those lines
+
+ let selection = Selection::new(
+ positions
+ .iter()
+ .copied()
+ .map(|pos| Range::new(pos, pos))
+ .collect(),
+ 0,
+ );
+
+ let transaction = Transaction::change(state, changes.collect()).with_selection(selection);
+
+ transaction.apply(state);
+ // TODO: need to store into history if successful
+}
+
+// O inserts a new line before each line with a selection
pub fn normal_mode(state: &mut State, _count: usize) {
// TODO: if leaving append mode, move cursor back by 1