text: var _createClass = function () { 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); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
  
  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 eventedState from '../../globals/js/mixins/evented-state';
  import handles from '../../globals/js/mixins/handles';
  import on from '../../globals/js/misc/on';
  
  var Slider = function (_mixin) {
    _inherits(Slider, _mixin);
  
    /**
     * Slider.
     * @extends CreateComponent
     * @extends InitComponentBySearch
     * @extends Handles
     * @param {HTMLElement} element The element working as an slider.
     */
    function Slider(element, options) {
      _classCallCheck(this, Slider);
  
      var _this = _possibleConstructorReturn(this, (Slider.__proto__ || Object.getPrototypeOf(Slider)).call(this, element, options));
  
      _this._changeState = function (state, detail, callback) {
        callback();
      };
  
      _this.sliderActive = false;
      _this.dragging = false;
  
      _this.track = _this.element.querySelector(_this.options.selectorTrack);
      _this.filledTrack = _this.element.querySelector(_this.options.selectorFilledTrack);
      _this.thumb = _this.element.querySelector(_this.options.selectorThumb);
      _this.input = _this.element.querySelector(_this.options.selectorInput);
  
      if (_this.element.dataset.sliderInputBox) {
        _this.boundInput = _this.element.ownerDocument.querySelector(_this.element.dataset.sliderInputBox);
        _this._updateInput();
        _this.manage(on(_this.boundInput, 'change', function (evt) {
          _this.setValue(evt.target.value);
        }));
        _this.manage(on(_this.boundInput, 'focus', function (evt) {
          evt.target.select();
        }));
        // workaround for safari
        _this.manage(on(_this.boundInput, 'mouseup', function (evt) {
          evt.preventDefault();
        }));
      }
  
      _this._updatePosition();
  
      _this.manage(on(_this.thumb, 'mousedown', function () {
        _this.sliderActive = true;
      }));
      _this.manage(on(_this.element.ownerDocument, 'mouseup', function () {
        _this.sliderActive = false;
      }));
      _this.manage(on(_this.element.ownerDocument, 'mousemove', function (evt) {
        var disabled = _this.element.classList.contains(_this.options.classDisabled);
        if (_this.sliderActive === true && !disabled) {
          _this._updatePosition(evt);
        }
      }));
      _this.manage(on(_this.thumb, 'keydown', function (evt) {
        var disabled = _this.element.classList.contains(_this.options.classDisabled);
        if (!disabled) {
          _this._updatePosition(evt);
        }
      }));
      _this.manage(on(_this.track, 'click', function (evt) {
        var disabled = _this.element.classList.contains(_this.options.classDisabled);
        if (!disabled) {
          _this._updatePosition(evt);
        }
      }));
      return _this;
    }
  
    _createClass(Slider, [{
      key: '_updatePosition',
      value: function _updatePosition(evt) {
        var _this2 = this;
  
        var _calcValue2 = this._calcValue(evt),
            left = _calcValue2.left,
            newValue = _calcValue2.newValue;
  
        if (this.dragging) {
          return;
        }
  
        this.dragging = true;
  
        requestAnimationFrame(function () {
          _this2.dragging = false;
          _this2.thumb.style.left = left + '%';
          _this2.filledTrack.style.transform = 'translate(0%, -50%) scaleX(' + left / 100 + ')';
          _this2.input.value = newValue;
          _this2._updateInput();
          _this2.changeState('slider-value-change', { value: newValue });
        });
      }
    }, {
      key: '_calcValue',
      value: function _calcValue(evt) {
        var _getInputProps = this.getInputProps(),
            value = _getInputProps.value,
            min = _getInputProps.min,
            max = _getInputProps.max,
            step = _getInputProps.step;
  
        var range = max - min;
        var valuePercentage = (value - min) / range * 100;
  
        var left = void 0;
        var newValue = void 0;
        left = valuePercentage;
        newValue = value;
  
        if (evt) {
          var type = evt.type;
  
  
          if (type === 'keydown') {
            var direction = {
              40: -1, // decreasing
              37: -1, // decreasing
              38: 1, // increasing
              39: 1 // increasing
            }[evt.which];
  
            if (direction !== undefined) {
              var multiplier = evt.shiftKey === true ? range / step / this.options.stepMultiplier : 1;
              var stepMultiplied = step * multiplier;
              var stepSize = stepMultiplied / range * 100;
              left = valuePercentage + stepSize * direction;
              newValue = Number(value) + stepMultiplied * direction;
            }
          }
          if (type === 'mousemove' || type === 'click') {
            if (type === 'click') {
              this.element.querySelector(this.options.selectorThumb).classList.add(this.options.classThumbClicked);
            } else {
              this.element.querySelector(this.options.selectorThumb).classList.remove(this.options.classThumbClicked);
            }
  
            var track = this.track.getBoundingClientRect();
            var unrounded = (evt.clientX - track.left) / track.width;
            var rounded = Math.round(range * unrounded / step) * step;
            left = rounded / range * 100;
            newValue = rounded + min;
          }
        }
  
        if (newValue <= Number(min)) {
          left = 0;
          newValue = min;
        }
        if (newValue >= Number(max)) {
          left = 100;
          newValue = max;
        }
  
        return { left: left, newValue: newValue };
      }
    }, {
      key: '_updateInput',
      value: function _updateInput() {
        if (this.boundInput) {
          this.boundInput.value = this.input.value;
        }
      }
    }, {
      key: 'getInputProps',
      value: function getInputProps() {
        var values = {
          value: Number(this.input.value),
          min: Number(this.input.min),
          max: Number(this.input.max),
          step: this.input.step ? Number(this.input.step) : 1
        };
        return values;
      }
    }, {
      key: 'setValue',
      value: function setValue(value) {
        this.input.value = value;
        this._updatePosition();
      }
    }, {
      key: 'stepUp',
      value: function stepUp() {
        this.input.stepUp();
        this._updatePosition();
      }
    }, {
      key: 'stepDown',
      value: function stepDown() {
        this.input.stepDown();
        this._updatePosition();
      }
  
      /**
       * The map associating DOM element and Slider UI instance.
       * @type {WeakMap}
       */
  
    }], [{
      key: 'options',
  
  
      /**
       * The component options.
       * If `options` is specified in the constructor,
       * properties in this object are overriden for the instance being created.
       * @property {string} selectorInit The CSS selector to find slider instances.
       */
      get: function get() {
        var prefix = settings.prefix;
  
        return {
          selectorInit: '[data-slider]',
          selectorTrack: '.' + prefix + '--slider__track',
          selectorFilledTrack: '.' + prefix + '--slider__filled-track',
          selectorThumb: '.' + prefix + '--slider__thumb',
          selectorInput: '.' + prefix + '--slider__input',
          classDisabled: prefix + '--slider--disabled',
          classThumbClicked: prefix + '--slider__thumb--clicked',
          eventBeforeSliderValueChange: 'slider-before-value-change',
          eventAfterSliderValueChange: 'slider-after-value-change',
          stepMultiplier: 4
        };
      }
    }]);
  
    return Slider;
  }(mixin(createComponent, initComponentBySearch, eventedState, handles));
  
  Slider.components = new WeakMap();
  
  
  export default Slider;