Implement as a new command

helix-term/src/commands.rs

@@ -296,6 +296,8 @@ impl MappableCommand {
         delete_selection, "Delete selection",
         delete_selection_noyank, "Delete selection without yanking",
         change_selection, "Change selection",
+        change_selection_with_indent, "Change selection and place the cursor at the appropriated indent",
+        change_selection_with_indent_noyank, "Change selection without yanking and place the cursor at the appropriated indent",
         change_selection_noyank, "Change selection without yanking",
         collapse_selection, "Collapse selection into single cursor",
         flip_selections, "Flip selection cursor and anchor",
@@ -2313,6 +2315,7 @@ fn shrink_to_line_bounds(cx: &mut Context) {
 enum Operation {
     Delete,
     Change,
+    ChangeWithIndent,
 }
 
 fn only_whole_lines(selection: &Selection, text: &Rope) -> bool {
@@ -2354,6 +2357,9 @@ fn delete_selection_impl(cx: &mut Context, op: Operation) {
             exit_select_mode(cx);
         }
         Operation::Change => {
+            enter_insert_mode(cx);
+        }
+        Operation::ChangeWithIndent => {
             if only_whole_lines {
                 open_above(cx);
             } else {
@@ -2427,6 +2433,15 @@ fn change_selection_noyank(cx: &mut Context) {
     delete_selection_impl(cx, Operation::Change);
 }
 
+fn change_selection_with_indent(cx: &mut Context) {
+    delete_selection_impl(cx, Operation::ChangeWithIndent);
+}
+
+fn change_selection_with_indent_noyank(cx: &mut Context) {
+    cx.register = Some('_');
+    delete_selection_impl(cx, Operation::ChangeWithIndent);
+}
+
 fn collapse_selection(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
     let text = doc.text().slice(..);