/**
* 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.caret_position = factory());
})(this, (function () { 'use strict';

	/**
	 * 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'
	 *
	 */

	/**
	 * 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);
	      }
	    }
	  }
	};

	/**
	 * Remove css classes
	 *
	 */
	const removeClasses = (elmts, ...classes) => {
	  var norm_classes = classesArray(classes);
	  elmts = castAsArray(elmts);
	  elmts.map(el => {
	    norm_classes.map(cls => {
	      el.classList.remove(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;
	};

	/**
	 * Get the index of an element amongst sibling nodes of the same type
	 *
	 */
	const nodeIndex = (el, amongst) => {
	  if (!el) return -1;
	  amongst = amongst || el.nodeName;
	  var i = 0;
	  while (el = el.previousElementSibling) {
	    if (el.matches(amongst)) {
	      i++;
	    }
	  }
	  return i;
	};

	/**
	 * 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 () {
	  var self = this;

	  /**
	   * Moves the caret to the specified index.
	   *
	   * The input must be moved by leaving it in place and moving the
	   * siblings, due to the fact that focus cannot be restored once lost
	   * on mobile webkit devices
	   *
	   */
	  self.hook('instead', 'setCaret', new_pos => {
	    if (self.settings.mode === 'single' || !self.control.contains(self.control_input)) {
	      new_pos = self.items.length;
	    } else {
	      new_pos = Math.max(0, Math.min(self.items.length, new_pos));
	      if (new_pos != self.caretPos && !self.isPending) {
	        self.controlChildren().forEach((child, j) => {
	          if (j < new_pos) {
	            self.control_input.insertAdjacentElement('beforebegin', child);
	          } else {
	            self.control.appendChild(child);
	          }
	        });
	      }
	    }
	    self.caretPos = new_pos;
	  });
	  self.hook('instead', 'moveCaret', direction => {
	    if (!self.isFocused) return;

	    // move caret before or after selected items
	    const last_active = self.getLastActive(direction);
	    if (last_active) {
	      const idx = nodeIndex(last_active);
	      self.setCaret(direction > 0 ? idx + 1 : idx);
	      self.setActiveItem();
	      removeClasses(last_active, 'last-active');

	      // move caret left or right of current position
	    } else {
	      self.setCaret(self.caretPos + direction);
	    }
	  });
	}

	return plugin;

}));
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