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opentui(input): auto-expanding composer textbox

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The composer was a fixed height:3. Match free-code/opencode: native textarea
auto-grow via direct minHeight={1} maxHeight={max(6,⌊rows/3⌋)} props (opencode's
prompt sizing) — 1 row when empty, grows with wrapped/multiline content up to ~a
third of the screen, then scrolls internally. maxHeight is a DIRECT reactive prop
(not in style) so the cap tracks terminal resize via useDimensions. 85 pass;
verified live (a long wrapping line grew the box to 3 rows).
This commit is contained in:
alt-glitch 2026-06-09 06:05:05 +00:00
parent bd3c253420
commit 080440bd9c
1 changed files with 8 additions and 1 deletions
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9
ui-tui-opentui-v2/src/view/composer.tsx
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@ -25,6 +25,7 @@ import { For, onMount, Show } from 'solid-js'
import type { CompletionItem } from '../logic/store.ts'
import type { PromptHistory } from '../logic/history.ts'
import { useDimensions } from './dimensions.tsx'
import { useTheme } from './theme.tsx'
const GUTTER = 2
@ -83,6 +84,10 @@ export function Composer(props: {
onImagePaste?: (() => void) | undefined
}) {
const theme = useTheme()
const dims = useDimensions()
// Auto-expand the input up to ~a third of the screen, then it scrolls internally
// (opencode's prompt: minHeight 1, maxHeight max(6, ⌊rows/3⌋)).
const maxHeight = () => Math.max(6, Math.floor(dims().height / 3))
let ta: TextareaRenderable | undefined
let submitting = false
const completions = () => props.completions?.() ?? []
@ -190,7 +195,9 @@ export function Composer(props: {
</box>
<textarea
ref={el => (ta = el)}
style={{ height: 3, flexGrow: 1, minWidth: 0 }}
minHeight={1}
maxHeight={maxHeight()}
style={{ flexGrow: 1, minWidth: 0 }}
placeholder={theme().brand.welcome}
placeholderColor={theme().color.muted}
textColor={theme().color.text}