billingerp/admin/libs/tom-select/dist/js/plugins/dropdown_input.js

/**
* Tom Select v2.4.2
* Licensed under the Apache License, Version 2.0 (the "License");
*/

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.dropdown_input = factory());
})(this, (function () { 'use strict';

	const KEY_ESC = 27;
	const KEY_TAB = 9;
	 // ctrl key or apple key for ma

	/**
	 * 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();
	    }
	  }
	};

	/**
	 * Add event helper
	 *
	 */
	const addEvent = (target, type, callback, options) => {
	  target.addEventListener(type, callback, options);
	};

	/**
	 * Iterates over arrays and hashes.
	 *
	 * ```
	 * iterate(this.items, function(item, id) {
	 *    // invoked for each item
	 * });
	 * ```
	 *
	 */
	const iterate = (object, callback) => {
	  if (Array.isArray(object)) {
	    object.forEach(callback);
	  } else {
	    for (var key in object) {
	      if (object.hasOwnProperty(key)) {
	        callback(object[key], key);
	      }
	    }
	  }
	};

	/**
	 * 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;
	};

	/**
	 * Add css classes
	 *
	 */
	const addClasses = (elmts, ...classes) => {
	  var norm_classes = classesArray(classes);
	  elmts = castAsArray(elmts);
	  elmts.map(el => {
	    norm_classes.map(cls => {
	      el.classList.add(cls);
	    });
	  });
	};

	/**
	 * Return arguments
	 *
	 */
	const classesArray = args => {
	  var classes = [];
	  iterate(args, _classes => {
	    if (typeof _classes === 'string') {
	      _classes = _classes.trim().split(/[\t\n\f\r\s]/);
	    }
	    if (Array.isArray(_classes)) {
	      classes = classes.concat(_classes);
	    }
	  });
	  return classes.filter(Boolean);
	};

	/**
	 * Create an array from arg if it's not already an array
	 *
	 */
	const castAsArray = arg => {
	  if (!Array.isArray(arg)) {
	    arg = [arg];
	  }
	  return arg;
	};

	/**
	 * Plugin: "dropdown_input" (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 () {
	  const self = this;
	  self.settings.shouldOpen = true; // make sure the input is shown even if there are no options to display in the dropdown

	  self.hook('before', 'setup', () => {
	    self.focus_node = self.control;
	    addClasses(self.control_input, 'dropdown-input');
	    const div = getDom('<div class="dropdown-input-wrap">');
	    div.append(self.control_input);
	    self.dropdown.insertBefore(div, self.dropdown.firstChild);

	    // set a placeholder in the select control
	    const placeholder = getDom('<input class="items-placeholder" tabindex="-1" />');
	    placeholder.placeholder = self.settings.placeholder || '';
	    self.control.append(placeholder);
	  });
	  self.on('initialize', () => {
	    // set tabIndex on control to -1, otherwise [shift+tab] will put focus right back on control_input
	    self.control_input.addEventListener('keydown', evt => {
	      //addEvent(self.control_input,'keydown' as const,(evt:KeyboardEvent) =>{
	      switch (evt.keyCode) {
	        case KEY_ESC:
	          if (self.isOpen) {
	            preventDefault(evt, true);
	            self.close();
	          }
	          self.clearActiveItems();
	          return;
	        case KEY_TAB:
	          self.focus_node.tabIndex = -1;
	          break;
	      }
	      return self.onKeyDown.call(self, evt);
	    });
	    self.on('blur', () => {
	      self.focus_node.tabIndex = self.isDisabled ? -1 : self.tabIndex;
	    });

	    // give the control_input focus when the dropdown is open
	    self.on('dropdown_open', () => {
	      self.control_input.focus();
	    });

	    // prevent onBlur from closing when focus is on the control_input
	    const orig_onBlur = self.onBlur;
	    self.hook('instead', 'onBlur', evt => {
	      if (evt && evt.relatedTarget == self.control_input) return;
	      return orig_onBlur.call(self);
	    });
	    addEvent(self.control_input, 'blur', () => self.onBlur());

	    // return focus to control to allow further keyboard input
	    self.hook('before', 'close', () => {
	      if (!self.isOpen) return;
	      self.focus_node.focus({
	        preventScroll: true
	      });
	    });
	  });
	}

	return plugin;

}));
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