text: /**
   * Copyright 2015 Google Inc. All Rights Reserved.
   *
   * 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.
   */
  
  /* Additional modifications of this Source Code Form is subject to the terms of the Mozilla Public
   * License, v. 2.0. If a copy of the MPL was not distributed with this
   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  
  define([], function () {
    'use strict';
  
    /**
     * Class constructor for Checkbox MDL component.
     * Implements MDL component design pattern defined at:
     * https://github.com/jasonmayes/mdl-component-design-pattern
     *
     * @constructor
     * @param {HTMLElement} element The element that will be upgraded.
     */
    var MaterialCheckbox = function MaterialCheckbox(element) {
      this.element_ = element;
  
      // Initialize instance.
      this.init();
    };
    window['MaterialCheckbox'] = MaterialCheckbox;
  
    /**
     * Store constants in one place so they can be updated easily.
     *
     * @enum {string | number}
     * @private
     */
    MaterialCheckbox.prototype.Constant_ = {
      TINY_TIMEOUT: 0.001
    };
  
    /**
     * Store strings for class names defined by this component that are used in
     * JavaScript. This allows us to simply change it in one place should we
     * decide to modify at a later date.
     *
     * @enum {string}
     * @private
     */
    MaterialCheckbox.prototype.CssClasses_ = {
      INPUT: 'input',
      BOX_OUTLINE: 'fxa-checkbox__box-outline',
      FOCUS_HELPER: 'fxa-checkbox__focus-helper',
      TICK_OUTLINE: 'fxa-checkbox__tick-outline',
      RIPPLE_EFFECT: 'fxa-js-ripple-effect',
      RIPPLE_IGNORE_EVENTS: 'fxa-js-ripple-effect--ignore-events',
      RIPPLE_CONTAINER: 'fxa-checkbox__ripple-container',
      RIPPLE_CENTER: 'fxa-ripple--center',
      RIPPLE: 'fxa-ripple',
      IS_FOCUSED: 'is-focused',
      IS_DISABLED: 'is-disabled',
      IS_CHECKED: 'is-checked',
      IS_UPGRADED: 'is-upgraded'
    };
  
    /**
     * Handle change of state.
     *
     * @param {Event} event The event that fired.
     * @private
     */
    MaterialCheckbox.prototype.onChange_ = function(event) {
      this.updateClasses_();
    };
  
    /**
     * Handle focus of element.
     *
     * @param {Event} event The event that fired.
     * @private
     */
    MaterialCheckbox.prototype.onFocus_ = function(event) {
      this.element_.classList.add(this.CssClasses_.IS_FOCUSED);
    };
  
    /**
     * Handle lost focus of element.
     *
     * @param {Event} event The event that fired.
     * @private
     */
    MaterialCheckbox.prototype.onBlur_ = function(event) {
      this.element_.classList.remove(this.CssClasses_.IS_FOCUSED);
    };
  
    /**
     * Handle mouseup.
     *
     * @param {Event} event The event that fired.
     * @private
     */
    MaterialCheckbox.prototype.onMouseUp_ = function(event) {
      this.blur_();
    };
  
    /**
     * Handle class updates.
     *
     * @private
     */
    MaterialCheckbox.prototype.updateClasses_ = function() {
      this.checkDisabled();
      this.checkToggleState();
    };
  
    /**
     * Add blur.
     *
     * @private
     */
    MaterialCheckbox.prototype.blur_ = function() {
      // TODO: figure out why there's a focus event being fired after our blur,
      // so that we can avoid this hack.
      window.setTimeout(function() {
        this.inputElement_.blur();
      }.bind(this), /** @type {number} */ (this.Constant_.TINY_TIMEOUT));
    };
  
    // Public methods.
  
    /**
     * Check the inputs toggle state and update display.
     *
     * @public
     */
    MaterialCheckbox.prototype.checkToggleState = function() {
      if (this.inputElement_.checked) {
        this.element_.classList.add(this.CssClasses_.IS_CHECKED);
      } else {
        this.element_.classList.remove(this.CssClasses_.IS_CHECKED);
      }
    };
    MaterialCheckbox.prototype['checkToggleState'] =
      MaterialCheckbox.prototype.checkToggleState;
  
    /**
     * Check the inputs disabled state and update display.
     *
     * @public
     */
    MaterialCheckbox.prototype.checkDisabled = function() {
      if (this.inputElement_.disabled) {
        this.element_.classList.add(this.CssClasses_.IS_DISABLED);
      } else {
        this.element_.classList.remove(this.CssClasses_.IS_DISABLED);
      }
    };
    MaterialCheckbox.prototype['checkDisabled'] =
      MaterialCheckbox.prototype.checkDisabled;
  
    /**
     * Disable checkbox.
     *
     * @public
     */
    MaterialCheckbox.prototype.disable = function() {
      this.inputElement_.disabled = true;
      this.updateClasses_();
    };
    MaterialCheckbox.prototype['disable'] = MaterialCheckbox.prototype.disable;
  
    /**
     * Enable checkbox.
     *
     * @public
     */
    MaterialCheckbox.prototype.enable = function() {
      this.inputElement_.disabled = false;
      this.updateClasses_();
    };
    MaterialCheckbox.prototype['enable'] = MaterialCheckbox.prototype.enable;
  
    /**
     * Check checkbox.
     *
     * @public
     */
    MaterialCheckbox.prototype.check = function() {
      this.inputElement_.checked = true;
      this.updateClasses_();
    };
    MaterialCheckbox.prototype['check'] = MaterialCheckbox.prototype.check;
  
    /**
     * Uncheck checkbox.
     *
     * @public
     */
    MaterialCheckbox.prototype.uncheck = function() {
      this.inputElement_.checked = false;
      this.updateClasses_();
    };
    MaterialCheckbox.prototype['uncheck'] = MaterialCheckbox.prototype.uncheck;
  
    /**
     * Initialize element.
     */
    MaterialCheckbox.prototype.init = function() {
      if (this.element_) {
        this.inputElement_ = this.element_.querySelector(this.CssClasses_.INPUT);
  
        var boxOutline = document.createElement('span');
        boxOutline.classList.add(this.CssClasses_.BOX_OUTLINE);
  
        var tickContainer = document.createElement('span');
        tickContainer.classList.add(this.CssClasses_.FOCUS_HELPER);
  
        var tickOutline = document.createElement('span');
        tickOutline.classList.add(this.CssClasses_.TICK_OUTLINE);
  
        boxOutline.appendChild(tickOutline);
  
        this.element_.appendChild(tickContainer);
        this.element_.appendChild(boxOutline);
  
        if (this.element_.classList.contains(this.CssClasses_.RIPPLE_EFFECT)) {
          this.element_.classList.add(this.CssClasses_.RIPPLE_IGNORE_EVENTS);
          this.rippleContainerElement_ = document.createElement('span');
          this.rippleContainerElement_.classList.add(this.CssClasses_.RIPPLE_CONTAINER);
          this.rippleContainerElement_.classList.add(this.CssClasses_.RIPPLE_EFFECT);
          this.rippleContainerElement_.classList.add(this.CssClasses_.RIPPLE_CENTER);
          this.boundRippleMouseUp = this.onMouseUp_.bind(this);
          this.rippleContainerElement_.addEventListener('mouseup', this.boundRippleMouseUp);
  
          var ripple = document.createElement('span');
          ripple.classList.add(this.CssClasses_.RIPPLE);
  
          this.rippleContainerElement_.appendChild(ripple);
          this.element_.appendChild(this.rippleContainerElement_);
        }
        this.boundInputOnChange = this.onChange_.bind(this);
        this.boundInputOnFocus = this.onFocus_.bind(this);
        this.boundInputOnBlur = this.onBlur_.bind(this);
        this.boundElementMouseUp = this.onMouseUp_.bind(this);
        this.inputElement_.addEventListener('change', this.boundInputOnChange);
        this.inputElement_.addEventListener('focus', this.boundInputOnFocus);
        this.inputElement_.addEventListener('blur', this.boundInputOnBlur);
        this.element_.addEventListener('mouseup', this.boundElementMouseUp);
  
        this.updateClasses_();
        this.element_.classList.add(this.CssClasses_.IS_UPGRADED);
      }
    };
  
    /**
     * Downgrade the component.
     *
     * @private
     */
    MaterialCheckbox.prototype.mdlDowngrade_ = function() {
      if (this.rippleContainerElement_) {
        this.rippleContainerElement_.removeEventListener('mouseup', this.boundRippleMouseUp);
      }
      this.inputElement_.removeEventListener('change', this.boundInputOnChange);
      this.inputElement_.removeEventListener('focus', this.boundInputOnFocus);
      this.inputElement_.removeEventListener('blur', this.boundInputOnBlur);
      this.element_.removeEventListener('mouseup', this.boundElementMouseUp);
    };
  
    return MaterialCheckbox;
  });
  