react-beautiful-dnd/lib/view/draggable-dimension-publisher/draggable-dimension-publisher.js

Beautiful, accessible drag and drop for lists with React.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _defineProperty2 = require('babel-runtime/helpers/defineProperty');

var _defineProperty3 = _interopRequireDefault(_defineProperty2);

var _getPrototypeOf = require('babel-runtime/core-js/object/get-prototype-of');

var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _react = require('react');

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _memoizeOne = require('memoize-one');

var _memoizeOne2 = _interopRequireDefault(_memoizeOne);

var _getWindowScrollPosition = require('../get-window-scroll-position');

var _getWindowScrollPosition2 = _interopRequireDefault(_getWindowScrollPosition);

var _dimension = require('../../state/dimension');

var _contextKeys = require('../context-keys');

var _getArea = require('../../state/get-area');

var _getArea2 = _interopRequireDefault(_getArea);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var DraggableDimensionPublisher = function (_Component) {
  (0, _inherits3.default)(DraggableDimensionPublisher, _Component);

  function DraggableDimensionPublisher() {
    var _ref;

    var _temp, _this, _ret;

    (0, _classCallCheck3.default)(this, DraggableDimensionPublisher);

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return _ret = (_temp = (_this = (0, _possibleConstructorReturn3.default)(this, (_ref = DraggableDimensionPublisher.__proto__ || (0, _getPrototypeOf2.default)(DraggableDimensionPublisher)).call.apply(_ref, [this].concat(args))), _this), _this.publishedDescriptor = null, _this.getMemoizedDescriptor = (0, _memoizeOne2.default)(function (id, droppableId, index) {
      return {
        id: id,
        droppableId: droppableId,
        index: index
      };
    }), _this.unpublish = function () {
      if (!_this.publishedDescriptor) {
        console.error('cannot unpublish descriptor when none is published');
        return;
      }

      var marshal = _this.context[_contextKeys.dimensionMarshalKey];
      marshal.unregisterDraggable(_this.publishedDescriptor);
      _this.publishedDescriptor = null;
    }, _this.publish = function (descriptor) {
      if (descriptor === _this.publishedDescriptor) {
        return;
      }

      if (_this.publishedDescriptor) {
        _this.unpublish();
      }

      var marshal = _this.context[_contextKeys.dimensionMarshalKey];
      marshal.registerDraggable(descriptor, _this.getDimension);
      _this.publishedDescriptor = descriptor;
    }, _this.getDimension = function () {
      var targetRef = _this.props.targetRef;

      if (!targetRef) {
        throw new Error('DraggableDimensionPublisher cannot calculate a dimension when not attached to the DOM');
      }

      var descriptor = _this.publishedDescriptor;

      if (!descriptor) {
        throw new Error('Cannot get dimension for unpublished draggable');
      }

      var style = window.getComputedStyle(targetRef);

      var margin = {
        top: parseInt(style.marginTop, 10),
        right: parseInt(style.marginRight, 10),
        bottom: parseInt(style.marginBottom, 10),
        left: parseInt(style.marginLeft, 10)
      };

      var client = (0, _getArea2.default)(targetRef.getBoundingClientRect());

      var dimension = (0, _dimension.getDraggableDimension)({
        descriptor: descriptor,
        client: client,
        margin: margin,
        windowScroll: (0, _getWindowScrollPosition2.default)()
      });

      return dimension;
    }, _temp), (0, _possibleConstructorReturn3.default)(_this, _ret);
  }

  (0, _createClass3.default)(DraggableDimensionPublisher, [{
    key: 'getDescriptor',
    value: function getDescriptor(props) {
      var draggableId = props.draggableId,
          droppableId = props.droppableId,
          index = props.index;

      var descriptor = this.getMemoizedDescriptor(draggableId, droppableId, index);
      return descriptor;
    }
  }, {
    key: 'componentWillMount',
    value: function componentWillMount() {
      this.publish(this.getDescriptor(this.props));
    }
  }, {
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(nextProps) {
      this.publish(this.getDescriptor(nextProps));
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.unpublish();
    }
  }, {
    key: 'render',
    value: function render() {
      return this.props.children;
    }
  }]);
  return DraggableDimensionPublisher;
}(_react.Component);

DraggableDimensionPublisher.contextTypes = (0, _defineProperty3.default)({}, _contextKeys.dimensionMarshalKey, _propTypes2.default.object.isRequired);
exports.default = DraggableDimensionPublisher;