carbon-components/es/components/checkbox/checkbox.js

function _typeof(obj) {
  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
    _typeof = function _typeof(obj) {
      return typeof obj;
    };
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    _typeof = function _typeof(obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
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  return _typeof(obj);
}

function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
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}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
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}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _possibleConstructorReturn(self, call) {
  if (call && (_typeof(call) === "object" || typeof call === "function")) {
    return call;
  }

  return _assertThisInitialized(self);
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };
  return _getPrototypeOf(o);
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
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  return _setPrototypeOf(o, p);
}
/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */


import settings from '../../globals/js/settings';
import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import handles from '../../globals/js/mixins/handles';
import on from '../../globals/js/misc/on';
var stateChangeTypes = {
  true: 'true',
  false: 'false',
  mixed: 'mixed'
};

var Checkbox =
/*#__PURE__*/
function (_mixin) {
  _inherits(Checkbox, _mixin);
  /**
   * Checkbox UI.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @extends Handles
   * @param {HTMLElement} element The element working as a checkbox UI.
   */


  function Checkbox(element, options) {
    var _this;

    _classCallCheck(this, Checkbox);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(Checkbox).call(this, element, options));

    _this.manage(on(_this.element, 'click', function (event) {
      _this._handleClick(event);
    }));

    _this.manage(on(_this.element, 'focus', function (event) {
      _this._handleFocus(event);
    }));

    _this.manage(on(_this.element, 'blur', function (event) {
      _this._handleBlur(event);
    }));

    _this._indeterminateCheckbox();

    _this._initCheckbox();

    return _this;
  }

  _createClass(Checkbox, [{
    key: "_handleClick",
    value: function _handleClick() {
      if (this.element.checked === true) {
        this.element.setAttribute('checked', '');
        this.element.setAttribute('aria-checked', 'true');
        this.element.checked = true; // nested checkboxes inside labels

        if (this.element.parentElement.classList.contains(this.options.classLabel)) {
          this.element.parentElement.setAttribute(this.options.attribContainedCheckboxState, 'true');
        }
      } else if (this.element.checked === false) {
        this.element.removeAttribute('checked');
        this.element.setAttribute('aria-checked', 'false');
        this.element.checked = false; // nested checkboxes inside labels

        if (this.element.parentElement.classList.contains(this.options.classLabel)) {
          this.element.parentElement.setAttribute(this.options.attribContainedCheckboxState, 'false');
        }
      }
    }
  }, {
    key: "_handleFocus",
    value: function _handleFocus() {
      if (this.element.parentElement.classList.contains(this.options.classLabel)) {
        this.element.parentElement.classList.add(this.options.classLabelFocused);
      }
    }
  }, {
    key: "_handleBlur",
    value: function _handleBlur() {
      if (this.element.parentElement.classList.contains(this.options.classLabel)) {
        this.element.parentElement.classList.remove(this.options.classLabelFocused);
      }
    }
    /**
     * Sets the new checkbox state.
     * @param {boolean|string} [state]
     *   The new checkbox state to set. `mixed` to put checkbox in indeterminate state.
     *   If omitted, this method simply makes the style reflect `aria-checked` attribute.
     */

  }, {
    key: "setState",
    value: function setState(state) {
      if (state === undefined || stateChangeTypes[state] === undefined) {
        throw new TypeError('setState expects a value of true, false or mixed.');
      }

      this.element.setAttribute('aria-checked', state);
      this.element.indeterminate = state === stateChangeTypes.mixed;
      this.element.checked = state === stateChangeTypes.true;
      var container = this.element.closest(this.options.selectorContainedCheckboxState);

      if (container) {
        container.setAttribute(this.options.attribContainedCheckboxState, state);
      }
    }
  }, {
    key: "setDisabled",
    value: function setDisabled(value) {
      if (value === undefined) {
        throw new TypeError('setDisabled expects a boolean value of true or false');
      }

      if (value === true) {
        this.element.setAttribute('disabled', true);
      } else if (value === false) {
        this.element.removeAttribute('disabled');
      }

      var container = this.element.closest(this.options.selectorContainedCheckboxDisabled);

      if (container) {
        container.setAttribute(this.options.attribContainedCheckboxDisabled, value);
      }
    }
  }, {
    key: "_indeterminateCheckbox",
    value: function _indeterminateCheckbox() {
      if (this.element.getAttribute('aria-checked') === 'mixed') {
        this.element.indeterminate = true;
      }

      if (this.element.indeterminate === true) {
        this.element.setAttribute('aria-checked', 'mixed');
      }

      if (this.element.parentElement.classList.contains(this.options.classLabel) && this.element.indeterminate === true) {
        this.element.parentElement.setAttribute(this.options.attribContainedCheckboxState, 'mixed');
      }
    }
  }, {
    key: "_initCheckbox",
    value: function _initCheckbox() {
      if (this.element.checked === true) {
        this.element.setAttribute('aria-checked', 'true');
      }

      if (this.element.parentElement.classList.contains(this.options.classLabel) && this.element.checked) {
        this.element.parentElement.setAttribute(this.options.attribContainedCheckboxState, 'true');
      }

      if (this.element.parentElement.classList.contains(this.options.classLabel)) {
        this.element.parentElement.setAttribute(this.options.attribContainedCheckboxDisabled, 'false');
      }

      if (this.element.parentElement.classList.contains(this.options.classLabel) && this.element.disabled) {
        this.element.parentElement.setAttribute(this.options.attribContainedCheckboxDisabled, 'true');
      }
    }
    /**
     * The map associating DOM element and copy button UI instance.
     * @member Checkbox.components
     * @type {WeakMap}
     */

  }], [{
    key: "options",

    /**
     * The component options.
     * If `options` is specified in the constructor, {@linkcode Checkbox.create .create()}, or {@linkcode Checkbox.init .init()},
     * properties in this object are overriden for the instance being create and how {@linkcode Checkbox.init .init()} works.
     * @member Checkbox.options
     * @type {Object}
     * @property {string} selectorInit The data attribute to find copy button UIs.
     * @property {string} selectorContainedCheckboxState The CSS selector to find a container of checkbox preserving checked state.
     * @property {string} selectorContainedCheckboxDisabled
     *   The CSS selector to find a container of checkbox preserving disabled state.
     * @property {string} classLabel The CSS class for the label.
     * @property {string} classLabelFocused The CSS class for the focused label.
     * @property {string} attribContainedCheckboxState The attribute name for the checked state of contained checkbox.
     * @property {string} attribContainedCheckboxDisabled The attribute name for the disabled state of contained checkbox.
     */
    get: function get() {
      var prefix = settings.prefix;
      return {
        selectorInit: ".".concat(prefix, "--checkbox"),
        selectorContainedCheckboxState: '[data-contained-checkbox-state]',
        selectorContainedCheckboxDisabled: '[data-contained-checkbox-disabled]',
        classLabel: "".concat(prefix, "--checkbox-label"),
        classLabelFocused: "".concat(prefix, "--checkbox-label__focus"),
        attribContainedCheckboxState: 'data-contained-checkbox-state',
        attribContainedCheckboxDisabled: 'data-contained-checkbox-disabled'
      };
    }
  }]);

  Checkbox.components = new WeakMap();
  Checkbox.stateChangeTypes = stateChangeTypes;
  return Checkbox;
}(mixin(createComponent, initComponentBySearch, handles));

export default Checkbox;