Function isShownInternal

javascript/atoms/typescript/is-displayed.ts:368–471

(elem: Element, ignoreOpacity: boolean, displayedFn: (element: Node) => boolean)

  }

  function isShownInternal(elem: Element, ignoreOpacity: boolean, displayedFn: (element: Node) => boolean): boolean {
    if (!isElement(elem)) {
      throw new Error('Argument to isShown must be of type Element');
    }

    if (isElement(elem, 'BODY')) {
      return true;
    }

    if (isElement(elem, 'OPTION') || isElement(elem, 'OPTGROUP')) {
      var select = (elem as Element).closest('select');
      return !!select && isShownInternal(select, true, displayedFn);
    }

    var imageMap = maybeFindImageMap(elem);
    if (imageMap) {
      return !!imageMap.image && imageMap.rect.width > 0 && imageMap.rect.height > 0 &&
        isShownInternal(imageMap.image, ignoreOpacity, displayedFn);
    }

    if (isElement(elem, 'INPUT') && (elem as HTMLInputElement).type.toLowerCase() === 'hidden') {
      return false;
    }

    if (isElement(elem, 'NOSCRIPT')) {
      return false;
    }

    var visibility = getEffectiveStyle(elem, 'visibility');
    if (visibility === 'collapse' || visibility === 'hidden') {
      return false;
    }

    if (!displayedFn(elem)) {
      return false;
    }

    if (!ignoreOpacity && getOpacity(elem) === 0) {
      return false;
    }

    function positiveSize(element: Element): boolean {
      var rect = getClientRect(element);
      if (rect.height > 0 && rect.width > 0) {
        return true;
      }

      if (isElement(element, 'PATH') && (rect.height > 0 || rect.width > 0)) {
        var strokeWidth = getEffectiveStyle(element, 'stroke-width');
        return !!strokeWidth && parseInt(strokeWidth, 10) > 0;
      }

      var elementVisibility = getEffectiveStyle(element, 'visibility');
      if (elementVisibility === 'collapse' || elementVisibility === 'hidden') {
        return false;
      }

      if (!displayedFn(element)) {