Function parseMouseEvent

src/ink/parse-keypress.ts:594–609

* Parse an SGR mouse event sequence into a ParsedMouse, or null if not a * mouse event or if it's a wheel event (wheel stays as ParsedKey for the * keybinding system). Button bit 0x40 = wheel, bit 0x20 = drag/motion.

(s: string)

 * keybinding system). Button bit 0x40 = wheel, bit 0x20 = drag/motion.
 */
function parseMouseEvent(s: string): ParsedMouse | null {
  const match = SGR_MOUSE_RE.exec(s)
  if (!match) return null
  const button = parseInt(match[1]!, 10)
  // Wheel events (bit 6 set, low bits 0/1 for up/down) stay as ParsedKey
  // so the keybinding system can route them to scroll handlers.
  if ((button & 0x40) !== 0) return null
  return {
    kind: 'mouse',
    button,
    action: match[4] === 'M' ? 'press' : 'release',
    col: parseInt(match[2]!, 10),
    row: parseInt(match[3]!, 10),
    sequence: s,
  }
}

function parseKeypress(s: string = ''): ParsedKey {
  let parts