Method snapOutOfImageRef

source code/utils/Cursor.ts:342–353

* If offset lands strictly inside an [Image #N] chip, snap it to the given * boundary. Used by word-movement methods so Ctrl+W / Alt+D never leave a * partial chip.

(offset: number, toward: 'start' | 'end')

   * partial chip.
   */
  snapOutOfImageRef(offset: number, toward: 'start' | 'end'): number {
    const re = /\[Image #\d+\]/g
    let m
    while ((m = re.exec(this.text)) !== null) {
      const start = m.index
      const end = start + m[0].length
      if (offset > start && offset < end) {
        return toward === 'start' ? start : end
      }
    }
    return offset
  }

  up(): Cursor {
    const { line, column } = this.getPosition()