qtsd-fork/example/node_modules/react-dnd/lib/createTargetFactory.js

Do not use this please

'use strict';

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

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; }; }();

exports.default = createTargetFactory;

var _invariant = require('invariant');

var _invariant2 = _interopRequireDefault(_invariant);

var _isPlainObject = require('lodash/isPlainObject');

var _isPlainObject2 = _interopRequireDefault(_isPlainObject);

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

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

var ALLOWED_SPEC_METHODS = ['canDrop', 'hover', 'drop'];

function createTargetFactory(spec) {
	Object.keys(spec).forEach(function (key) {
		(0, _invariant2.default)(ALLOWED_SPEC_METHODS.indexOf(key) > -1, 'Expected the drop target specification to only have ' + 'some of the following keys: %s. ' + 'Instead received a specification with an unexpected "%s" key. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs-drop-target.html', ALLOWED_SPEC_METHODS.join(', '), key);
		(0, _invariant2.default)(typeof spec[key] === 'function', 'Expected %s in the drop target specification to be a function. ' + 'Instead received a specification with %s: %s. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs-drop-target.html', key, key, spec[key]);
	});

	var Target = function () {
		function Target(monitor) {
			_classCallCheck(this, Target);

			this.monitor = monitor;
			this.props = null;
			this.component = null;
		}

		_createClass(Target, [{
			key: 'receiveProps',
			value: function receiveProps(props) {
				this.props = props;
			}
		}, {
			key: 'receiveMonitor',
			value: function receiveMonitor(monitor) {
				this.monitor = monitor;
			}
		}, {
			key: 'receiveComponent',
			value: function receiveComponent(component) {
				this.component = component;
			}
		}, {
			key: 'canDrop',
			value: function canDrop() {
				if (!spec.canDrop) {
					return true;
				}

				return spec.canDrop(this.props, this.monitor);
			}
		}, {
			key: 'hover',
			value: function hover() {
				if (!spec.hover) {
					return;
				}

				spec.hover(this.props, this.monitor, this.component);
			}
		}, {
			key: 'drop',
			value: function drop() {
				if (!spec.drop) {
					return undefined;
				}

				var dropResult = spec.drop(this.props, this.monitor, this.component);
				if (process.env.NODE_ENV !== 'production') {
					(0, _invariant2.default)(typeof dropResult === 'undefined' || (0, _isPlainObject2.default)(dropResult), 'drop() must either return undefined, or an object that represents the drop result. ' + 'Instead received %s. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs-drop-target.html', dropResult);
				}
				return dropResult;
			}
		}]);

		return Target;
	}();

	return function createTarget(monitor) {
		return new Target(monitor);
	};
}