Handle starting and continuing the count separately (helix-editor#9887)

helix-term/src/ui/editor.rs

@@ -916,13 +916,15 @@ impl EditorView {
 
     fn command_mode(&mut self, mode: Mode, cxt: &mut commands::Context, event: KeyEvent) {
         match (event, cxt.editor.count) {
-            // count handling
-            (key!(i @ '0'), Some(_)) | (key!(i @ '1'..='9'), _)
-                if !self.keymaps.contains_key(mode, event) =>
-            {
+            // If the count is already started and the input is a number, always continue the count.
+            (key!(i @ '0'..='9'), Some(count)) => {
+                let i = i.to_digit(10).unwrap() as usize;
+                cxt.editor.count = NonZeroUsize::new(count.get() * 10 + i);
+            }
+            // A non-zero digit will start the count if that number isn't used by a keymap.
+            (key!(i @ '1'..='9'), None) if !self.keymaps.contains_key(mode, event) => {
                 let i = i.to_digit(10).unwrap() as usize;
-                cxt.editor.count =
-                    std::num::NonZeroUsize::new(cxt.editor.count.map_or(i, |c| c.get() * 10 + i));
+                cxt.editor.count = NonZeroUsize::new(i);
             }
             // special handling for repeat operator
             (key!('.'), _) if self.keymaps.pending().is_empty() => {