Parse input counts: 10w, etc.

TODO.md

@@ -11,7 +11,7 @@
 - [ ] selection mode
 - [x] % for whole doc selection
 - [x] vertical splits
-- [ ] input counts (30j)
+- [x] input counts (30j)
 - [ ] respect view fullscreen flag
 - [ ] retain horiz when moving vertically
 - [ ] update lsp on redo/undo

helix-term/src/ui/editor.rs

@@ -9,7 +9,7 @@ use std::borrow::Cow;
 
 use crossterm::{
     cursor,
-    event::{read, Event, EventStream, KeyCode, KeyEvent},
+    event::{read, Event, EventStream, KeyCode, KeyEvent, KeyModifiers},
 };
 use tui::{
     backend::CrosstermBackend,
@@ -333,10 +333,27 @@ impl Component for EditorView {
                         }
                     }
                     mode => {
-                        if let Some(command) = self.keymap[&mode].get(&keys) {
-                            command(&mut cxt);
+                        match keys.as_slice() {
+                            &[KeyEvent {
+                                code: KeyCode::Char(i @ '0'..='9'),
+                                modifiers: KeyModifiers::NONE,
+                            }] => {
+                                let i = i.to_digit(10).unwrap() as usize;
+                                cxt.editor.count = Some(cxt.editor.count.map_or(i, |c| c * 10 + i));
+                            }
+                            _ => {
+                                // set the count
+                                cxt.count = cxt.editor.count.take().unwrap_or(1);
+                                // TODO: edge case: 0j -> reset to 1
+                                // if this fails, count was Some(0)
+                                // debug_assert!(cxt.count != 0);
 
-                            // TODO: simplistic ensure cursor in view for now
+                                if let Some(command) = self.keymap[&mode].get(&keys) {
+                                    command(&mut cxt);
+
+                                    // TODO: simplistic ensure cursor in view for now
+                                }
+                            }
                         }
                     }
                 }

helix-view/src/editor.rs

@@ -10,6 +10,7 @@ pub struct Editor {
     pub tree: Tree,
     // pub documents: Vec<Document>,
     pub should_close: bool,
+    pub count: Option<usize>,
     pub theme: Theme, // TODO: share one instance
     pub language_servers: helix_lsp::Registry,
 }
@@ -25,6 +26,7 @@ impl Editor {
         Self {
             tree: Tree::new(area),
             should_close: false,
+            count: None,
             theme,
             language_servers,
         }