preact-arco-design/es/_class/Draggable/index.js

Arco Design React UI Library.

var __read = this && this.__read || function (o, n) {
  var m = typeof Symbol === "function" && o[Symbol.iterator];
  if (!m) return o;
  var i = m.call(o),
      r,
      ar = [],
      e;

  try {
    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) {
      ar.push(r.value);
    }
  } catch (error) {
    e = {
      error: error
    };
  } finally {
    try {
      if (r && !r.done && (m = i["return"])) m.call(i);
    } finally {
      if (e) throw e.error;
    }
  }

  return ar;
};

import React, { useContext, useState } from "preact/compat";
import { ConfigContext } from "../../ConfigProvider";
import cs from "../../_util/classNames";
import Item from "./item";
export default function Draggable(props) {
  var getPrefixCls = useContext(ConfigContext).getPrefixCls;
  var prefixCls = getPrefixCls('draggable');
  var className = props.className,
      children = props.children,
      direction = props.direction,
      onIndexChange = props.onIndexChange,
      itemWrapperStyle = props.itemWrapperStyle;

  var _a = __read(useState(null), 2),
      dragItemIndex = _a[0],
      setDragItemIndex = _a[1];

  return React.createElement("div", {
    className: cs(prefixCls, className)
  }, React.Children.map(children, function (child, index) {
    return React.createElement(Item, {
      style: itemWrapperStyle,
      prefixCls: prefixCls,
      direction: direction,
      onDragStart: function onDragStart() {
        return setDragItemIndex(index);
      },
      onDragEnd: function onDragEnd() {
        return setDragItemIndex(null);
      },
      onDrop: function onDrop(_, dropPosition) {
        var prevIndex = dragItemIndex;
        var nextIndex = dropPosition === 'left' || dropPosition === 'top' ? index : index + 1;

        if (onIndexChange && prevIndex !== nextIndex) {
          onIndexChange(nextIndex, prevIndex);
        }
      }
    }, child);
  }));
}
Draggable.defaultProps = {
  direction: 'vertical'
};