🎯 Use case
This file lives under “ink/”, which covers Ink terminal UI (layouts, TTY IO, keyboard, renderer components). On the API surface it exposes parseEsc — mainly functions, hooks, or classes. It composes internal code from types (relative imports). What the file header says: ESC Sequence Parser Handles simple escape sequences: ESC + one or two characters.
Generated from folder role, exports, dependency roots, and inline comments — not hand-reviewed for every path.
🧠 Inline summary
ESC Sequence Parser Handles simple escape sequences: ESC + one or two characters
📤 Exports (heuristic)
parseEsc
🖥️ Source preview
/**
* ESC Sequence Parser
*
* Handles simple escape sequences: ESC + one or two characters
*/
import type { Action } from './types.js'
/**
* Parse a simple ESC sequence
*
* @param chars - Characters after ESC (not including ESC itself)
*/
export function parseEsc(chars: string): Action | null {
if (chars.length === 0) return null
const first = chars[0]!
// Full reset (RIS)
if (first === 'c') {
return { type: 'reset' }
}
// Cursor save (DECSC)
if (first === '7') {
return { type: 'cursor', action: { type: 'save' } }
}
// Cursor restore (DECRC)
if (first === '8') {
return { type: 'cursor', action: { type: 'restore' } }
}
// Index - move cursor down (IND)
if (first === 'D') {
return {
type: 'cursor',
action: { type: 'move', direction: 'down', count: 1 },
}
}
// Reverse index - move cursor up (RI)
if (first === 'M') {
return {
type: 'cursor',
action: { type: 'move', direction: 'up', count: 1 },
}
}
// Next line (NEL)
if (first === 'E') {
return { type: 'cursor', action: { type: 'nextLine', count: 1 } }
}
// Horizontal tab set (HTS)
if (first === 'H') {
return null // Tab stop, not commonly needed
}
// Charset selection (ESC ( X, ESC ) X, etc.) - silently ignore
if ('()'.includes(first) && chars.length >= 2) {
return null
}
// Unknown
return { type: 'unknown', sequence: `\x1b${chars}` }
}