import type { PanzoomOptions } from './types'

function getClass(elem: Element) {
  return (elem.getAttribute('class') || '').trim()
}

function hasClass(elem: Element, className: string) {
  return elem.nodeType === 1 && ` ${getClass(elem)} `.indexOf(` ${className} `) > -1
}

export default function isExcluded(elem: Element, options: PanzoomOptions) {
  for (let cur = elem; cur != null; cur = cur.parentNode as Element) {
    if (hasClass(cur, options.excludeClass) || options.exclude.indexOf(cur) > -1) {
      return true
    }
  }
  return false
}