Update change-case commands to work with gap indexing.

helix-term/src/commands.rs

@@ -786,8 +786,11 @@ fn replace(cx: &mut Context) {
 
 fn switch_case(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
-    let transaction =
-        Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
+    let selection = doc
+        .selection(view.id)
+        .clone()
+        .min_width_1(doc.text().slice(..));
+    let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
         let text: Tendril = range
             .fragment(doc.text().slice(..))
             .chars()
@@ -802,7 +805,7 @@ fn switch_case(cx: &mut Context) {
             })
             .collect();
 
-            (range.from(), range.to() + 1, Some(text))
+        (range.from(), range.to(), Some(text))
     });
 
     doc.apply(&transaction, view.id);
@@ -811,11 +814,14 @@ fn switch_case(cx: &mut Context) {
 
 fn switch_to_uppercase(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
-    let transaction =
-        Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
+    let selection = doc
+        .selection(view.id)
+        .clone()
+        .min_width_1(doc.text().slice(..));
+    let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
         let text: Tendril = range.fragment(doc.text().slice(..)).to_uppercase().into();
 
-            (range.from(), range.to() + 1, Some(text))
+        (range.from(), range.to(), Some(text))
     });
 
     doc.apply(&transaction, view.id);
@@ -824,11 +830,14 @@ fn switch_to_uppercase(cx: &mut Context) {
 
 fn switch_to_lowercase(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
-    let transaction =
-        Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
+    let selection = doc
+        .selection(view.id)
+        .clone()
+        .min_width_1(doc.text().slice(..));
+    let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
         let text: Tendril = range.fragment(doc.text().slice(..)).to_lowercase().into();
 
-            (range.from(), range.to() + 1, Some(text))
+        (range.from(), range.to(), Some(text))
     });
 
     doc.apply(&transaction, view.id);