Function parseOSC

src/ink/termio/osc.ts:256–310

(content: string)

 * @param content - The sequence content (without ESC ] and terminator)
 */
export function parseOSC(content: string): Action | null {
  const semicolonIdx = content.indexOf(';')
  const command = semicolonIdx >= 0 ? content.slice(0, semicolonIdx) : content
  const data = semicolonIdx >= 0 ? content.slice(semicolonIdx + 1) : ''

  const commandNum = parseInt(command, 10)

  // Window/icon title
  if (commandNum === OSC.SET_TITLE_AND_ICON) {
    return { type: 'title', action: { type: 'both', title: data } }
  }
  if (commandNum === OSC.SET_ICON) {
    return { type: 'title', action: { type: 'iconName', name: data } }
  }
  if (commandNum === OSC.SET_TITLE) {
    return { type: 'title', action: { type: 'windowTitle', title: data } }
  }

  // Hyperlinks (OSC 8)
  if (commandNum === OSC.HYPERLINK) {
    const parts = data.split(';')
    const paramsStr = parts[0] ?? ''
    const url = parts.slice(1).join(';')

    if (url === '') {
      return { type: 'link', action: { type: 'end' } }
    }

    const params: Record<string, string> = {}
    if (paramsStr) {
      for (const pair of paramsStr.split(':')) {
        const eqIdx = pair.indexOf('=')
        if (eqIdx >= 0) {
          params[pair.slice(0, eqIdx)] = pair.slice(eqIdx + 1)
        }
      }
    }

    return {
      type: 'link',
      action: {
        type: 'start',
        url,
        params: Object.keys(params).length > 0 ? params : undefined,
      },
    }
  }

  // Tab status (OSC 21337)
  if (commandNum === OSC.TAB_STATUS) {
    return { type: 'tabStatus', action: parseTabStatus(data) }
  }

  return { type: 'unknown', sequence: `\x1b]${content}` }
}

/**
 * Parse an XParseColor-style color spec into an RGB Color.