wix-style-react/dist/es/src/DragAndDrop/Draggable/components/DragLayer.js

wix-style-react

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 React from 'react';
import { Portal } from 'react-portal';
import PropTypes from 'prop-types';
import { DragLayer } from 'react-dnd';

/* eslint-disable new-cap */

var layerStyles = {
  position: 'fixed',
  pointerEvents: 'none',
  zIndex: 100,
  left: 0,
  top: 0
};

var dragPreviewRef = null;

var onOffsetChange = function onOffsetChange(monitor) {
  if (!dragPreviewRef) {
    return;
  }

  var offset = monitor.getSourceClientOffset() || monitor.getInitialClientOffset();
  if (!offset) {
    return;
  }

  var transform = 'translate(' + offset.x + 'px, ' + offset.y + 'px)';
  dragPreviewRef.style.transform = transform;
  dragPreviewRef.style['-webkit-transform'] = transform;
};

var CustomDragLayer = function (_React$Component) {
  _inherits(CustomDragLayer, _React$Component);

  function CustomDragLayer() {
    var _ref;

    var _temp, _this, _ret;

    _classCallCheck(this, CustomDragLayer);

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

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = CustomDragLayer.__proto__ || Object.getPrototypeOf(CustomDragLayer)).call.apply(_ref, [this].concat(args))), _this), _this.shouldRenderLayer = function () {
      var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _this.props;
      var id = props.id,
          item = props.item,
          itemType = props.itemType,
          draggedType = props.draggedType,
          isDragging = props.isDragging;

      return isDragging && id === item.id && itemType === draggedType;
    }, _this.renderPreview = function () {
      var offsetOfHandle = _this.props.offsetOfHandle;

      var styles = Object.assign({}, layerStyles, {
        left: -offsetOfHandle.x,
        top: -offsetOfHandle.y
      });
      return React.createElement(
        'div',
        { style: styles, ref: function ref(node) {
            return dragPreviewRef = node;
          } },
        _this.props.renderPreview({})
      );
    }, _this.renderPreviewInPortal = function () {
      return React.createElement(
        Portal,
        null,
        _this.renderPreview()
      );
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  _createClass(CustomDragLayer, [{
    key: 'render',
    value: function render() {
      if (!this.shouldRenderLayer()) {
        return null;
      }
      return this.props.usePortal ? this.renderPreviewInPortal() : this.renderPreview();
    }
  }]);

  return CustomDragLayer;
}(React.Component);

CustomDragLayer.propTypes = {
  offsetOfHandle: PropTypes.object,
  item: PropTypes.object,
  itemType: PropTypes.string,
  draggedType: PropTypes.string,
  isDragging: PropTypes.bool,
  renderPreview: PropTypes.func,
  usePortal: PropTypes.bool,
  id: PropTypes.oneOfType([PropTypes.string, PropTypes.number])
};

export default DragLayer(function (monitor, props) {
  onOffsetChange(monitor);
  return {
    offsetOfHandle: props.offsetOfHandle,
    item: monitor.getItem(),
    itemType: monitor.getItemType(),
    isDragging: monitor.isDragging()
  };
})(CustomDragLayer);