react-beautiful-dnd/lib/view/drag-handle/util/create-scheduler.js

Beautiful, accessible drag and drop for lists with React.js

'use strict';

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

var _memoizeOne = require('memoize-one');

var _memoizeOne2 = _interopRequireDefault(_memoizeOne);

var _rafSchd = require('raf-schd');

var _rafSchd2 = _interopRequireDefault(_rafSchd);

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

exports.default = function (callbacks, isDraggingFn) {
  var ifDragging = function ifDragging(fn) {
    if (isDraggingFn()) {
      fn();
    }
  };

  var memoizedMove = (0, _memoizeOne2.default)(function (x, y) {
    var point = { x: x, y: y };
    callbacks.onMove(point);
  });

  var move = (0, _rafSchd2.default)(function (point) {
    ifDragging(function () {
      return memoizedMove(point.x, point.y);
    });
  });

  var moveForward = (0, _rafSchd2.default)(function () {
    ifDragging(callbacks.onMoveForward);
  });

  var moveBackward = (0, _rafSchd2.default)(function () {
    ifDragging(callbacks.onMoveBackward);
  });

  var crossAxisMoveForward = (0, _rafSchd2.default)(function () {
    ifDragging(callbacks.onCrossAxisMoveForward);
  });

  var crossAxisMoveBackward = (0, _rafSchd2.default)(function () {
    ifDragging(callbacks.onCrossAxisMoveBackward);
  });

  var windowScrollMove = (0, _rafSchd2.default)(function () {
    ifDragging(callbacks.onWindowScroll);
  });

  return {
    move: move,
    moveForward: moveForward,
    moveBackward: moveBackward,
    crossAxisMoveForward: crossAxisMoveForward,
    crossAxisMoveBackward: crossAxisMoveBackward,
    windowScrollMove: windowScrollMove
  };
};