/**
* Tom Select v2.6.0
* Licensed under the Apache License, Version 2.0 (the "License");
*/

/**
 * Converts a scalar to its best string representation
 * for hash keys and HTML attribute values.
 *
 * Transformations:
 *   'str'     -> 'str'
 *   null      -> ''
 *   undefined -> ''
 *   true      -> '1'
 *   false     -> '0'
 *   0         -> '0'
 *   1         -> '1'
 *
 */

/**
 * Prevent default
 *
 */
const preventDefault = (evt, stop = false) => {
  if (evt) {
    evt.preventDefault();
    if (stop) {
      evt.stopPropagation();
    }
  }
};

/**
 * Return a dom element from either a dom query string, jQuery object, a dom element or html string
 * https://stackoverflow.com/questions/494143/creating-a-new-dom-element-from-an-html-string-using-built-in-dom-methods-or-pro/35385518#35385518
 *
 * param query should be {}
 */
const getDom = query => {
  if (query.jquery) {
    return query[0];
  }
  if (query instanceof HTMLElement) {
    return query;
  }
  if (isHtmlString(query)) {
    var tpl = document.createElement('template');
    tpl.innerHTML = query.trim(); // Never return a text node of whitespace as the result
    return tpl.content.firstChild;
  }
  return document.querySelector(query);
};
const isHtmlString = arg => {
  if (typeof arg === 'string' && arg.indexOf('<') > -1) {
    return true;
  }
  return false;
};

/**
 * Plugin: "dropdown_header" (Tom Select)
 * Copyright (c) contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
 * file except in compliance with the License. You may obtain a copy of the License at:
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
 * ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 *
 */

function plugin (userOptions) {
  const self = this;
  const options = Object.assign({
    title: 'Untitled',
    headerClass: 'dropdown-header',
    titleRowClass: 'dropdown-header-title',
    labelClass: 'dropdown-header-label',
    closeClass: 'dropdown-header-close',
    html: data => {
      return '<div class="' + data.headerClass + '">' + '<div class="' + data.titleRowClass + '">' + '<span class="' + data.labelClass + '">' + data.title + '</span>' + '<a class="' + data.closeClass + '">&times;</a>' + '</div>' + '</div>';
    }
  }, userOptions);
  self.on('initialize', () => {
    var header = getDom(options.html(options));
    var close_link = header.querySelector('.' + options.closeClass);
    if (close_link) {
      close_link.addEventListener('click', evt => {
        preventDefault(evt, true);
        self.close();
      });
    }
    self.dropdown.insertBefore(header, self.dropdown.firstChild);
  });
}

export { plugin as default };
//# sourceMappingURL=plugin.js.map
