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Viewing file:     DragLayer.js (8.84 KB)      -rw-r--r--

"use strict";

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

var React = _interopRequireWildcard(require("react"));

var _shallowequal = require("@react-dnd/shallowequal");

var _hoistNonReactStatics = _interopRequireDefault(require("hoist-non-react-statics"));

var _invariant = require("@react-dnd/invariant");

var _index = require("../index");

var _js_utils = require("../utils/js_utils");

var _utils = require("./utils");

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

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

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

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

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; }; return _setPrototypeOf(o, p); }

function DragLayer(collect) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  (0, _utils.checkDecoratorArguments)('DragLayer', 'collect[, options]', collect, options);
  (0, _invariant.invariant)(typeof collect === 'function', 'Expected "collect" provided as the first argument to DragLayer to be a function that collects props to inject into the component. ', 'Instead, received %s. Read more: http://react-dnd.github.io/react-dnd/docs/api/drag-layer', collect);
  (0, _invariant.invariant)((0, _js_utils.isPlainObject)(options), 'Expected "options" provided as the second argument to DragLayer to be a plain object when specified. ' + 'Instead, received %s. Read more: http://react-dnd.github.io/react-dnd/docs/api/drag-layer', options);
  return function decorateLayer(DecoratedComponent) {
    var Decorated = DecoratedComponent;
    var _options$arePropsEqua = options.arePropsEqual,
        arePropsEqual = _options$arePropsEqua === void 0 ? _shallowequal.shallowEqual : _options$arePropsEqua;
    var displayName = Decorated.displayName || Decorated.name || 'Component';

    var DragLayerContainer =
    /*#__PURE__*/
    function (_React$Component) {
      _inherits(DragLayerContainer, _React$Component);

      function DragLayerContainer() {
        var _this;

        _classCallCheck(this, DragLayerContainer);

        _this = _possibleConstructorReturn(this, _getPrototypeOf(DragLayerContainer).apply(this, arguments));
        _this.isCurrentlyMounted = false;
        _this.ref = React.createRef();

        _this.handleChange = function () {
          if (!_this.isCurrentlyMounted) {
            return;
          }

          var nextState = _this.getCurrentState();

          if (!(0, _shallowequal.shallowEqual)(nextState, _this.state)) {
            _this.setState(nextState);
          }
        };

        return _this;
      }

      _createClass(DragLayerContainer, [{
        key: "getDecoratedComponentInstance",
        value: function getDecoratedComponentInstance() {
          (0, _invariant.invariant)(this.ref.current, 'In order to access an instance of the decorated component, it must either be a class component or use React.forwardRef()');
          return this.ref.current;
        }
      }, {
        key: "shouldComponentUpdate",
        value: function shouldComponentUpdate(nextProps, nextState) {
          return !arePropsEqual(nextProps, this.props) || !(0, _shallowequal.shallowEqual)(nextState, this.state);
        }
      }, {
        key: "componentDidMount",
        value: function componentDidMount() {
          this.isCurrentlyMounted = true;
          this.handleChange();
        }
      }, {
        key: "componentWillUnmount",
        value: function componentWillUnmount() {
          this.isCurrentlyMounted = false;

          if (this.unsubscribeFromOffsetChange) {
            this.unsubscribeFromOffsetChange();
            this.unsubscribeFromOffsetChange = undefined;
          }

          if (this.unsubscribeFromStateChange) {
            this.unsubscribeFromStateChange();
            this.unsubscribeFromStateChange = undefined;
          }
        }
      }, {
        key: "render",
        value: function render() {
          var _this2 = this;

          return React.createElement(_index.DndContext.Consumer, null, function (_ref) {
            var dragDropManager = _ref.dragDropManager;

            if (dragDropManager === undefined) {
              return null;
            }

            _this2.receiveDragDropManager(dragDropManager); // Let componentDidMount fire to initialize the collected state


            if (!_this2.isCurrentlyMounted) {
              return null;
            }

            return React.createElement(Decorated, Object.assign({}, _this2.props, _this2.state, {
              ref: (0, _utils.isRefable)(Decorated) ? _this2.ref : null
            }));
          });
        }
      }, {
        key: "receiveDragDropManager",
        value: function receiveDragDropManager(dragDropManager) {
          if (this.manager !== undefined) {
            return;
          }

          this.manager = dragDropManager;
          (0, _invariant.invariant)(_typeof(dragDropManager) === 'object', 'Could not find the drag and drop manager in the context of %s. ' + 'Make sure to render a DndProvider component in your top-level component. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs/troubleshooting#could-not-find-the-drag-and-drop-manager-in-the-context', displayName, displayName);
          var monitor = this.manager.getMonitor();
          this.unsubscribeFromOffsetChange = monitor.subscribeToOffsetChange(this.handleChange);
          this.unsubscribeFromStateChange = monitor.subscribeToStateChange(this.handleChange);
        }
      }, {
        key: "getCurrentState",
        value: function getCurrentState() {
          if (!this.manager) {
            return {};
          }

          var monitor = this.manager.getMonitor();
          return collect(monitor, this.props);
        }
      }]);

      return DragLayerContainer;
    }(React.Component);

    DragLayerContainer.displayName = "DragLayer(".concat(displayName, ")");
    DragLayerContainer.DecoratedComponent = DecoratedComponent;
    return (0, _hoistNonReactStatics.default)(DragLayerContainer, DecoratedComponent);
  };
}