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feat(keymap,editor): add Ctrl-d/u half-page scroll

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Decode Ctrl+D/Ctrl+U as HalfPageDown/HalfPageUp intents (matching the existing
DeleteWord/DeleteLine chord pattern, so the editor stays ignorant of Ctrl).
They step display (soft-wrapped) rows, not logical lines, so half a page is
half the visible window regardless of how prose wraps: Normal moves the caret
and the viewport follows, View scrolls the viewport, Insert/Command are no-ops.
This commit is contained in:
Julien Calixte
2026-07-11 18:32:05 +02:00
parent 491dc57144
commit fc83306a81
3 changed files with 147 additions and 6 deletions
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14
docs/roadmap.md
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@@ -49,7 +49,7 @@ name = "v0.2 navigation"
start = 2026-06-29
original = 2026-07-20
status = "on-track"
note = "Core work landed early: motions and modes already run; gutter, Ctrl-d/u, UTF-8 buffer remain."
note = "Core work landed early: motions and modes already run; Ctrl-d/u and the UTF-8 buffer landed 2026-07-11; only the line-number gutter remains."
[[feature]]
name = "v0.2.5 international input"
@@ -190,12 +190,16 @@ Out of scope: Vim, palette, multiple files, branches, conflict handling.
## v0.2 — Vim navigation — [~]
**Status:** navigation done in core; the **UTF-8-correct buffer landed
2026-07-11** (hardware-verified). Remaining = `Ctrl-d/u` and the line-number
gutter. Shipped early beyond scope: a read-only **View** mode and the full
`d`/`c` operator + text-object grammar (see v0.3 / v0.4).
2026-07-11** (hardware-verified) and **`Ctrl-d/u` half-page scroll landed
2026-07-11** (host-tested). Remaining = the line-number gutter. Shipped early
beyond scope: a read-only **View** mode and the full `d`/`c` operator +
text-object grammar (see v0.3 / v0.4).
- [x] Mode state machine (Normal / Insert / View), mode indicator in the status strip
- [~] Movement: `h j k l`, `w b e`, `0 $`, `gg G` (✓); `Ctrl-d Ctrl-u` remain
- [x] Movement: `h j k l`, `w b e`, `0 $`, `gg G`, `Ctrl-d Ctrl-u`. `Ctrl-d/u`
step **display** (soft-wrapped) rows, not logical lines — half a page is
half the visible window however prose wraps; decoded as `HalfPageDown/Up`
intents in the keymap, caret moves and the viewport follows.
- [x] `i a o O A` to enter Insert
- [x] `Esc` returns to Normal
- [ ] Line numbers in the left gutter: **absolute** — Spike 13 first. Relative