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编辑当前文件:/home/freeclou/app.optimyar.com/backend/node_modules/dnd-core/dist/cjs/actions/dragDrop/drop.js

"use strict";

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

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

var _types = require("./types");

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

function createDrop(manager) {
  return function drop() {
    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    var monitor = manager.getMonitor();
    var registry = manager.getRegistry();
    verifyInvariants(monitor);
    var targetIds = getDroppableTargets(monitor); // Multiple actions are dispatched here, which is why this doesn't return an action

targetIds.forEach(function (targetId, index) {
      var dropResult = determineDropResult(targetId, index, registry, monitor);
      var action = {
        type: _types.DROP,
        payload: {
          dropResult: _objectSpread({}, options, {}, dropResult)
        }
      };
      manager.dispatch(action);
    });
  };
}

function verifyInvariants(monitor) {
  (0, _invariant.invariant)(monitor.isDragging(), 'Cannot call drop while not dragging.');
  (0, _invariant.invariant)(!monitor.didDrop(), 'Cannot call drop twice during one drag operation.');
}

function determineDropResult(targetId, index, registry, monitor) {
  var target = registry.getTarget(targetId);
  var dropResult = target ? target.drop(monitor, targetId) : undefined;
  verifyDropResultType(dropResult);

if (typeof dropResult === 'undefined') {
    dropResult = index === 0 ? {} : monitor.getDropResult();
  }

return dropResult;
}

function verifyDropResultType(dropResult) {
  (0, _invariant.invariant)(typeof dropResult === 'undefined' || (0, _js_utils.isObject)(dropResult), 'Drop result must either be an object or undefined.');
}

function getDroppableTargets(monitor) {
  var targetIds = monitor.getTargetIds().filter(monitor.canDropOnTarget, monitor);
  targetIds.reverse();
  return targetIds;
}