carbon-components/es/components/date-picker/date-picker.js

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/**
 * 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 Flatpickr from 'flatpickr';
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';
import { componentsX } from '../../globals/js/feature-flags';
/* eslint no-underscore-dangle: [2, { "allow": ["_input", "_updateClassNames", "_updateInputFields"], "allowAfterThis": true }] */
// `this.options` create-component mix-in creates prototype chain
// so that `options` given in constructor argument wins over the one defined in static `options` property
// 'Flatpickr' wants flat structure of object instead

function flattenOptions(options) {
  var o = {}; // eslint-disable-next-line guard-for-in, no-restricted-syntax

  for (var key in options) {
    o[key] = options[key];
  }

  return o;
} // Weekdays shorthand for english locale


Flatpickr.l10ns.en.weekdays.shorthand.forEach(function (day, index) {
  var currentDay = Flatpickr.l10ns.en.weekdays.shorthand;

  if (currentDay[index] === 'Thu' || currentDay[index] === 'Th') {
    currentDay[index] = 'Th';
  } else {
    currentDay[index] = currentDay[index].charAt(0);
  }
});

var toArray = function toArray(arrayLike) {
  return Array.prototype.slice.call(arrayLike);
};

var DatePicker =
/*#__PURE__*/
function (_mixin) {
  _inherits(DatePicker, _mixin);
  /**
   * DatePicker.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @extends Handles
   * @param {HTMLElement} element The element working as an date picker.
   */


  function DatePicker(element, options) {
    var _this;

    _classCallCheck(this, DatePicker);

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

    _this._handleFocus = function () {
      if (_this.calendar) {
        _this.calendar.open();
      }
    };

    _this._handleBlur = function (event) {
      if (_this.calendar) {
        var focusTo = event.relatedTarget;

        if (!focusTo || !_this.element.contains(focusTo) && (!_this.calendar.calendarContainer || !_this.calendar.calendarContainer.contains(focusTo))) {
          _this.calendar.close();
        }
      }
    };

    _this._initDatePicker = function (type) {
      if (type === 'range') {
        // Given FlatPickr assumes one `<input>` even in range mode,
        // use a hidden `<input>` for such purpose, separate from our from/to `<input>`s
        var doc = _this.element.ownerDocument;
        var rangeInput = doc.createElement('input');
        rangeInput.className = _this.options.classVisuallyHidden;
        rangeInput.setAttribute('aria-hidden', 'true');

        _this.element.appendChild(rangeInput);

        _this._rangeInput = rangeInput; // An attempt to open the date picker dropdown when this component gets focus,
        // and close the date picker dropdown when this component loses focus

        var w = doc.defaultView;
        var hasFocusin = 'onfocusin' in w;
        var hasFocusout = 'onfocusout' in w;
        var focusinEventName = hasFocusin ? 'focusin' : 'focus';
        var focusoutEventName = hasFocusout ? 'focusout' : 'blur';

        _this.manage(on(_this.element, focusinEventName, _this._handleFocus, !hasFocusin));

        _this.manage(on(_this.element, focusoutEventName, _this._handleBlur, !hasFocusout));

        _this.manage(on(_this.element.querySelector(_this.options.selectorDatePickerIcon), focusoutEventName, _this._handleBlur, !hasFocusout));
      }

      var self = _assertThisInitialized(_assertThisInitialized(_this));

      var date = type === 'range' ? _this._rangeInput : _this.element.querySelector(_this.options.selectorDatePickerInput);
      var _this$options = _this.options,
          _onClose = _this$options.onClose,
          _onChange = _this$options.onChange,
          _onMonthChange = _this$options.onMonthChange,
          _onYearChange = _this$options.onYearChange,
          _onOpen = _this$options.onOpen,
          _onValueUpdate = _this$options.onValueUpdate;
      var calendar = new Flatpickr(date, Object.assign(flattenOptions(_this.options), {
        allowInput: true,
        mode: type,
        positionElement: type === 'range' && _this.element.querySelector(_this.options.selectorDatePickerInputFrom),
        onClose: function onClose(selectedDates) {
          // An attempt to disable Flatpickr's focus tracking system,
          // which has adverse effect with our old set up with two `<input>`s or our latest setup with a hidden `<input>`
          if (self.shouldForceOpen) {
            if (self.calendar.calendarContainer) {
              self.calendar.calendarContainer.classList.add('open');
            }

            self.calendar.isOpen = true;
          }

          for (var _len = arguments.length, remainder = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
            remainder[_key - 1] = arguments[_key];
          }

          if (!_onClose || _onClose.call.apply(_onClose, [this, selectedDates].concat(remainder)) !== false) {
            self._updateClassNames(calendar);

            self._updateInputFields(selectedDates, type);
          }
        },
        onChange: function onChange() {
          for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
            args[_key2] = arguments[_key2];
          }

          if (!_onChange || _onChange.call.apply(_onChange, [this].concat(args)) !== false) {
            self._updateClassNames(calendar);

            if (type === 'range') {
              if (calendar.selectedDates.length === 1 && calendar.isOpen) {
                self.element.querySelector(self.options.selectorDatePickerInputTo).classList.add(self.options.classFocused);
              } else {
                self.element.querySelector(self.options.selectorDatePickerInputTo).classList.remove(self.options.classFocused);
              }
            }
          }
        },
        onMonthChange: function onMonthChange() {
          for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
            args[_key3] = arguments[_key3];
          }

          if (!_onMonthChange || _onMonthChange.call.apply(_onMonthChange, [this].concat(args)) !== false) {
            self._updateClassNames(calendar);
          }
        },
        onYearChange: function onYearChange() {
          for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
            args[_key4] = arguments[_key4];
          }

          if (!_onYearChange || _onYearChange.call.apply(_onYearChange, [this].concat(args)) !== false) {
            self._updateClassNames(calendar);
          }
        },
        onOpen: function onOpen() {
          // An attempt to disable Flatpickr's focus tracking system,
          // which has adverse effect with our old set up with two `<input>`s or our latest setup with a hidden `<input>`
          self.shouldForceOpen = true;
          setTimeout(function () {
            self.shouldForceOpen = false;
          }, 0);

          for (var _len5 = arguments.length, args = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {
            args[_key5] = arguments[_key5];
          }

          if (!_onOpen || _onOpen.call.apply(_onOpen, [this].concat(args)) !== false) {
            self._updateClassNames(calendar);
          }
        },
        onValueUpdate: function onValueUpdate() {
          for (var _len6 = arguments.length, args = new Array(_len6), _key6 = 0; _key6 < _len6; _key6++) {
            args[_key6] = arguments[_key6];
          }

          if ((!_onValueUpdate || _onValueUpdate.call.apply(_onValueUpdate, [this].concat(args)) !== false) && type === 'range') {
            self._updateInputFields(self.calendar.selectedDates, type);
          }
        },
        nextArrow: _this._rightArrowHTML(),
        prevArrow: _this._leftArrowHTML()
      }));

      if (type === 'range') {
        _this._addInputLogic(_this.element.querySelector(_this.options.selectorDatePickerInputFrom), 0);

        _this._addInputLogic(_this.element.querySelector(_this.options.selectorDatePickerInputTo), 1);
      }

      _this.manage(on(_this.element.querySelector(_this.options.selectorDatePickerIcon), 'click', function () {
        calendar.open();
      }));

      _this._updateClassNames(calendar);

      if (type !== 'range') {
        _this._addInputLogic(date);
      }

      return calendar;
    };

    _this._addInputLogic = function (input, index) {
      if (!isNaN(index) && (index < 0 || index > 1)) {
        throw new RangeError("The index of <input> (".concat(index, ") is out of range."));
      }

      var inputField = input;

      _this.manage(on(inputField, 'change', function (evt) {
        if (evt.isTrusted || evt.detail && evt.detail.isNotFromFlatpickr) {
          var inputDate = _this.calendar.parseDate(inputField.value);

          if (inputDate && !isNaN(inputDate.valueOf())) {
            if (isNaN(index)) {
              _this.calendar.setDate(inputDate);
            } else {
              var selectedDates = _this.calendar.selectedDates;
              selectedDates[index] = inputDate;

              _this.calendar.setDate(selectedDates);
            }
          }
        }

        _this._updateClassNames(_this.calendar);
      })); // An attempt to temporarily set the `<input>` being edited as the one FlatPicker manages,
      // as FlatPicker attempts to take over `keydown` event handler on `document` to run on the date picker dropdown.


      _this.manage(on(inputField, 'keydown', function (evt) {
        var origInput = _this.calendar._input;
        _this.calendar._input = evt.target;
        setTimeout(function () {
          _this.calendar._input = origInput;
        });
      }));
    };

    _this._updateClassNames = function (_ref) {
      var calendarContainer = _ref.calendarContainer,
          selectedDates = _ref.selectedDates;

      if (calendarContainer) {
        calendarContainer.classList.add(_this.options.classCalendarContainer);
        calendarContainer.querySelector('.flatpickr-month').classList.add(_this.options.classMonth);
        calendarContainer.querySelector('.flatpickr-weekdays').classList.add(_this.options.classWeekdays);
        calendarContainer.querySelector('.flatpickr-days').classList.add(_this.options.classDays);
        toArray(calendarContainer.querySelectorAll('.flatpickr-weekday')).forEach(function (item) {
          var currentItem = item;
          currentItem.innerHTML = currentItem.innerHTML.replace(/\s+/g, '');
          currentItem.classList.add(_this.options.classWeekday);
        });
        toArray(calendarContainer.querySelectorAll('.flatpickr-day')).forEach(function (item) {
          item.classList.add(_this.options.classDay);

          if (item.classList.contains('today') && selectedDates.length > 0) {
            item.classList.add('no-border');
          } else if (item.classList.contains('today') && selectedDates.length === 0) {
            item.classList.remove('no-border');
          }
        });
      }
    };

    _this._updateInputFields = function (selectedDates, type) {
      if (type === 'range') {
        if (selectedDates.length === 2) {
          _this.element.querySelector(_this.options.selectorDatePickerInputFrom).value = _this._formatDate(selectedDates[0]);
          _this.element.querySelector(_this.options.selectorDatePickerInputTo).value = _this._formatDate(selectedDates[1]);
        } else if (selectedDates.length === 1) {
          _this.element.querySelector(_this.options.selectorDatePickerInputFrom).value = _this._formatDate(selectedDates[0]);
        }
      } else if (selectedDates.length === 1) {
        _this.element.querySelector(_this.options.selectorDatePickerInput).value = _this._formatDate(selectedDates[0]);
      }

      _this._updateClassNames(_this.calendar);
    };

    _this._formatDate = function (date) {
      return _this.calendar.formatDate(date, _this.calendar.config.dateFormat);
    };

    var _type = _this.element.getAttribute(_this.options.attribType);

    _this.calendar = _this._initDatePicker(_type);

    if (_this.calendar.calendarContainer) {
      _this.manage(on(_this.element, 'keydown', function (e) {
        if (e.which === 40) {
          _this.calendar.calendarContainer.focus();
        }
      }));

      _this.manage(on(_this.calendar.calendarContainer, 'keydown', function (e) {
        if (e.which === 9 && _type === 'range') {
          _this._updateClassNames(_this.calendar);

          _this.element.querySelector(_this.options.selectorDatePickerInputFrom).focus();
        }
      }));
    }

    return _this;
  }
  /**
   * Opens the date picker dropdown when this component gets focus.
   * Used only for range mode for now.
   * @private
   */


  _createClass(DatePicker, [{
    key: "_rightArrowHTML",
    value: function _rightArrowHTML() {
      return componentsX ? "\n      <svg\n        focusable=\"false\"\n        preserveAspectRatio=\"xMidYMid meet\"\n        style=\"will-change: transform;\"\n        xmlns=\"http://www.w3.org/2000/svg\"\n        width=\"16\"\n        height=\"16\"\n        viewBox=\"0 0 16 16\"\n        aria-hidden=\"true\">\n          <path d=\"M11 8l-5 5-.7-.7L9.6 8 5.3 3.7 6 3z\"></path>\n      </svg>" : "\n      <svg width=\"8\" height=\"12\" viewBox=\"0 0 8 12\" fill-rule=\"evenodd\">\n        <path d=\"M0 10.6L4.7 6 0 1.4 1.4 0l6.1 6-6.1 6z\"></path>\n      </svg>";
    }
  }, {
    key: "_leftArrowHTML",
    value: function _leftArrowHTML() {
      return componentsX ? "\n      <svg\n        focusable=\"false\"\n        preserveAspectRatio=\"xMidYMid meet\"\n        style=\"will-change: transform;\"\n        xmlns=\"http://www.w3.org/2000/svg\"\n        width=\"16\"\n        height=\"16\"\n        viewBox=\"0 0 16 16\"\n        aria-hidden=\"true\"\n      >\n        <path d=\"M5 8l5-5 .7.7L6.4 8l4.3 4.3-.7.7z\"></path>\n      </svg>" : "\n      <svg width=\"8\" height=\"12\" viewBox=\"0 0 8 12\" fill-rule=\"evenodd\">\n        <path d=\"M7.5 10.6L2.8 6l4.7-4.6L6.1 0 0 6l6.1 6z\"></path>\n      </svg>";
    }
  }, {
    key: "release",
    value: function release() {
      if (this._rangeInput && this._rangeInput.parentNode) {
        this._rangeInput.parentNode.removeChild(this._rangeInput);
      }

      if (this.calendar) {
        try {
          this.calendar.destroy();
        } catch (err) {} // eslint-disable-line no-empty


        this.calendar = null;
      }

      return _get(_getPrototypeOf(DatePicker.prototype), "release", this).call(this);
    }
    /**
     * The component options.
     * If `options` is specified in the constructor,
     * {@linkcode DatePicker.create .create()}, or {@linkcode DatePicker.init .init()},
     * properties in this object are overriden for the instance being create and how {@linkcode DatePicker.init .init()} works.
     * @property {string} selectorInit The CSS selector to find date picker UIs.
     */

  }], [{
    key: "options",
    get: function get() {
      var prefix = settings.prefix;
      return {
        selectorInit: '[data-date-picker]',
        selectorDatePickerInput: '[data-date-picker-input]',
        selectorDatePickerInputFrom: '[data-date-picker-input-from]',
        selectorDatePickerInputTo: '[data-date-picker-input-to]',
        selectorDatePickerIcon: '[data-date-picker-icon]',
        classCalendarContainer: "".concat(prefix, "--date-picker__calendar"),
        classMonth: "".concat(prefix, "--date-picker__month"),
        classWeekdays: "".concat(prefix, "--date-picker__weekdays"),
        classDays: "".concat(prefix, "--date-picker__days"),
        classWeekday: "".concat(prefix, "--date-picker__weekday"),
        classDay: "".concat(prefix, "--date-picker__day"),
        classFocused: "".concat(prefix, "--focused"),
        classVisuallyHidden: "".concat(prefix, "--visually-hidden"),
        attribType: 'data-date-picker-type',
        dateFormat: 'm/d/Y'
      };
    }
    /**
     * The map associating DOM element and date picker UI instance.
     * @type {WeakMap}
     */

  }]);

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

export default DatePicker;