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TSX
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354import { useState } from "react"import { Box, Text } from "ink"import type { TextInputProps } from "./text-input.js"
export type ChatCommand = { name: string; description: string }const common: ChatCommand[] = [ { name: "/a", description: "browse sessions" }, { name: "/t", description: "show or hide thinking" }, { name: "/v", description: "expand or collapse code, output and diffs" }, { name: "/status", description: "show state, workspace and usage" }, { name: "/q", description: "quit" },]
export function useCommandMenu(value: string, submit: (value: string) => void, extra: ChatCommand[] = []) { const [selected, select] = useState(0) const [dismissed, dismiss] = useState("") // One row per name: the last occurrence wins, so chat's own builtins stay // authoritative over catalog entries with the same name. const matches = /^\/[^\r\n]*$/.test(value) && value !== dismissed ? [...extra, ...common] .filter((item, index, all) => all.findLastIndex((other) => other.name === item.name) === index) .filter((item) => item.name.startsWith(value)) : [] const index = Math.min(selected, Math.max(0, matches.length - 1)) const onKey: NonNullable<TextInputProps["onKey"]> = (_, key, replace) => { const choice = matches[index] if (!choice) { return false } if (key.escape) { dismiss(value) } else if (key.upArrow || key.downArrow) { select(Math.max(0, Math.min(matches.length - 1, index + (key.upArrow ? -1 : 1)))) } else if (key.tab) { replace(choice.name) } else if (key.return && !key.shift) { submit(choice.name) } else { select(0) return false } return true } const shown = matches.slice(Math.max(0, index - 3), Math.max(4, index + 1)) return { onKey, rows: shown.length, view: <Box flexDirection="column">{shown.map((item) => ( <Text key={item.name} inverse={item === matches[index]} wrap="truncate-end"> {item.name} {item.description} </Text> ))}</Box>, }}