int ExternalPopupMenu::toPopupMenuItemIndex(int externalPopupMenuItemIndex, HTMLSelectElement& ownerElement)
{
    if (externalPopupMenuItemIndex < 0)
        return externalPopupMenuItemIndex;

    int indexTracker = 0;
    const WillBeHeapVector<RawPtrWillBeMember<HTMLElement>>& items = ownerElement.listItems();
    for (int i = 0; i < static_cast<int>(items.size()); ++i) {
        if (ownerElement.itemIsDisplayNone(*items[i]))
            continue;
        if (indexTracker++ == externalPopupMenuItemIndex)
            return i;
    }
    return -1;
}
void ExternalPopupMenu::getPopupMenuInfo(WebPopupMenuInfo& info, HTMLSelectElement& ownerElement)
{
    const WillBeHeapVector<RawPtrWillBeMember<HTMLElement>>& listItems = ownerElement.listItems();
    size_t itemCount = listItems.size();
    size_t count = 0;
    Vector<WebMenuItemInfo> items(itemCount);
    for (size_t i = 0; i < itemCount; ++i) {
        if (ownerElement.itemIsDisplayNone(*listItems[i]))
            continue;

        Element& itemElement = *listItems[i];
        WebMenuItemInfo& popupItem = items[count++];
        popupItem.label = ownerElement.itemText(itemElement);
        popupItem.toolTip = itemElement.title();
        popupItem.checked = false;
        if (isHTMLHRElement(itemElement)) {
            popupItem.type = WebMenuItemInfo::Separator;
        } else if (isHTMLOptGroupElement(itemElement)) {
            popupItem.type = WebMenuItemInfo::Group;
        } else {
            popupItem.type = WebMenuItemInfo::Option;
            popupItem.checked = toHTMLOptionElement(itemElement).selected();
        }
        popupItem.enabled = !itemElement.isDisabledFormControl();
        const ComputedStyle& style = *ownerElement.itemComputedStyle(itemElement);
        popupItem.textDirection = toWebTextDirection(style.direction());
        popupItem.hasTextDirectionOverride = isOverride(style.unicodeBidi());
    }

    const ComputedStyle& menuStyle = ownerElement.computedStyle() ? *ownerElement.computedStyle() : *ownerElement.ensureComputedStyle();
    info.itemHeight = menuStyle.font().fontMetrics().height();
    info.itemFontSize = static_cast<int>(menuStyle.font().fontDescription().computedSize());
    info.selectedIndex = toExternalPopupMenuItemIndex(ownerElement.optionToListIndex(ownerElement.selectedIndex()), ownerElement);
    info.rightAligned = menuStyle.direction() == RTL;
    info.allowMultipleSelection = ownerElement.multiple();
    if (count < itemCount)
        items.shrink(count);
    info.items = items;

}