qtsd-fork/example/node_modules/react-dnd/lib/createSourceFactory.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 = createSourceFactory;

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 = ['canDrag', 'beginDrag', 'isDragging', 'endDrag'];
var REQUIRED_SPEC_METHODS = ['beginDrag'];

function createSourceFactory(spec) {
	Object.keys(spec).forEach(function (key) {
		(0, _invariant2.default)(ALLOWED_SPEC_METHODS.indexOf(key) > -1, 'Expected the drag source 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-drag-source.html', ALLOWED_SPEC_METHODS.join(', '), key);
		(0, _invariant2.default)(typeof spec[key] === 'function', 'Expected %s in the drag source specification to be a function. ' + 'Instead received a specification with %s: %s. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs-drag-source.html', key, key, spec[key]);
	});
	REQUIRED_SPEC_METHODS.forEach(function (key) {
		(0, _invariant2.default)(typeof spec[key] === 'function', 'Expected %s in the drag source specification to be a function. ' + 'Instead received a specification with %s: %s. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs-drag-source.html', key, key, spec[key]);
	});

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

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

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

				return spec.canDrag(this.props, this.monitor);
			}
		}, {
			key: 'isDragging',
			value: function isDragging(globalMonitor, sourceId) {
				if (!spec.isDragging) {
					return sourceId === globalMonitor.getSourceId();
				}

				return spec.isDragging(this.props, this.monitor);
			}
		}, {
			key: 'beginDrag',
			value: function beginDrag() {
				var item = spec.beginDrag(this.props, this.monitor, this.component);
				if (process.env.NODE_ENV !== 'production') {
					(0, _invariant2.default)((0, _isPlainObject2.default)(item), 'beginDrag() must return a plain object that represents the dragged item. ' + 'Instead received %s. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs-drag-source.html', item);
				}
				return item;
			}
		}, {
			key: 'endDrag',
			value: function endDrag() {
				if (!spec.endDrag) {
					return;
				}

				spec.endDrag(this.props, this.monitor, this.component);
			}
		}]);

		return Source;
	}();

	return function createSource(monitor) {
		return new Source(monitor);
	};
}