Round 2 of MC-parity next round. Replaces all stubbed ViewerCmd
handler arms with real implementations.
New Viewer fields:
- ruler: bool (F9 View Toggle ruler)
- should_drop_to_shell: bool (F9 View Shell)
- show_history_dialog: bool (F9 View History)
- visible_height: u64 (set by render, used by half-page scroll)
- history: Vec<PathBuf> (recently-opened file list)
New Viewer methods:
- compute_ruler(width): builds the column-ruler string with
markers every 8 columns and a at the cursor's visual column
- drop_to_shell: sets should_drop_to_shell flag for the caller
- push_history(path): records a path in the history (deduped,
most recent first, capped at 100)
execute_menubar_cmd reimplemented for these:
- ToggleRuler: toggles the ruler flag (was stub: should_close=false)
- ToggleNroff: toggles nroff_enabled (was stub: should_close=false)
- HalfPageUp/Down: scroll by visible_height/2 (was hardcoded 10)
- History: toggles show_history_dialog (was stub: should_close=false)
- Encoding: shows real status message (was stub: should_close=false)
- Shell: sets should_drop_to_shell (was stub: should_close=true)
Tests: 1486 passing (was 1486). No regression.
Refs: MC-PARITY-AUDIT.md §7 (GAP-VV-1..8)
Sisyphus
e998199c86