wip: ui: help popup while in editing mode.

src/ui/mod.rs

@@ -241,8 +241,9 @@ impl<'ws> Workspace<'ws> {
     fn handle_edit_input(&mut self, key: event::KeyEvent) -> Result<Option<ExitCode>> {
         if key.kind == KeyEventKind::Press {
             match key.code {
-                KeyCode::Char('?') => {
+                KeyCode::Char('?') if key.modifiers == KeyModifiers::CONTROL => {
                     self.enter_dialog_mode(self.render_help_text());
+                    return Ok(None);
                 }
                 KeyCode::Esc | KeyCode::Enter => self.exit_edit_mode()?,
                 _ => {

src/ui/render/mod.rs

@@ -32,7 +32,10 @@ impl<'ws> Workspace<'ws> {
                     .select(Some(ws.book.current_sheet as usize));
                 tabs.render(rect, buf);
             }),
-            Box::new(|rect: Rect, buf: &mut Buffer, ws: &mut Self| ws.text_area.render(rect, buf)),
+            Box::new(|rect: Rect, buf: &mut Buffer, ws: &mut Self| {
+                // TODO(zaphar): Show a small help text?
+                ws.text_area.render(rect, buf)
+            }),
             Box::new(move |rect: Rect, buf: &mut Buffer, ws: &mut Self| {
                 let sheet_name = ws.book.get_sheet_name().unwrap_or("Unknown");
                 let table_block = Block::bordered().title_top(sheet_name);

src/ui/test.rs

@@ -232,7 +232,10 @@ fn test_input_navitation_shift_enter_key() {
     ws.handle_input(construct_key_event(KeyCode::Enter))
         .expect("Failed to handle enter key");
     assert_eq!(row + 1, ws.book.location.row);
-    ws.handle_input(construct_modified_key_event(KeyCode::Enter, KeyModifiers::SHIFT))
+    ws.handle_input(construct_modified_key_event(
+        KeyCode::Enter,
+        KeyModifiers::SHIFT,
+    ))
     .expect("Failed to handle enter key");
     assert_eq!(row, ws.book.location.row);
 }
@@ -246,7 +249,25 @@ fn test_input_navitation_shift_tab_key() {
     ws.handle_input(construct_key_event(KeyCode::Tab))
         .expect("Failed to handle enter key");
     assert_eq!(col + 1, ws.book.location.col);
-    ws.handle_input(construct_modified_key_event(KeyCode::Tab, KeyModifiers::SHIFT))
+    ws.handle_input(construct_modified_key_event(
+        KeyCode::Tab,
+        KeyModifiers::SHIFT,
+    ))
     .expect("Failed to handle enter key");
     assert_eq!(col, ws.book.location.col);
 }
+
+#[test]
+fn test_edit_mode_help_keycode() {
+    let mut ws =
+        Workspace::new_empty("en", "America/New_York").expect("Failed to get empty workbook");
+    assert_eq!(Some(&Modality::Navigate), ws.state.modality_stack.last());
+    ws.handle_input(construct_key_event(KeyCode::Char('i')))
+        .expect("Failed to handle 'i' key");
+    assert_eq!(Some(&Modality::CellEdit), ws.state.modality_stack.last());
+    let edit_help = ws.render_help_text();
+    ws.handle_input(construct_modified_key_event(KeyCode::Char('?'), KeyModifiers::CONTROL))
+        .expect("Failed to handle 'ctrl-?' key event");
+    assert_eq!(Some(&Modality::Dialog), ws.state.modality_stack.last());
+    assert_eq!(edit_help, ws.state.popup);
+}