lowcode-engine/packages/editor-skeleton/src/layouts/left-area.tsx

import { Component, Fragment } from 'react';
import classNames from 'classnames';
import { observer } from '@alilc/lowcode-editor-core';
import { Area } from '../area';

@observer
export default class LeftArea extends Component<{ area: Area; className?: string }> {
  render() {
    const { area, className = 'lc-left-area' } = this.props;
    if (area.isEmpty()) {
      return null;
    }
    return (
      <div className={classNames(className, {
        'lc-area-visible': area.visible,
      })}
      >
        <Contents area={area} />
      </div>
    );
  }
}

@observer
class Contents extends Component<{ area: Area }> {
  render() {
    const { area } = this.props;
    const top: any[] = [];
    const bottom: any[] = [];
    area.container.items.slice().sort((a, b) => {
      const index1 = a.config?.index || 0;
      const index2 = b.config?.index || 0;
      return index1 === index2 ? 0 : (index1 > index2 ? 1 : -1);
    }).forEach((item) => {
      const content = <div key={`left-area-${item.name}`}>{item.content}</div>;
      if (item.align === 'bottom') {
        bottom.push(content);
      } else {
        top.push(content);
      }
    });
    return (
      <Fragment>
        <div className="lc-left-area-top">{top}</div>
        <div className="lc-left-area-bottom">{bottom}</div>
      </Fragment>
    );
  }
}