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

import { Component, Fragment } from 'react';
import classNames from 'classnames';
import { observer } from '@ali/lowcode-editor-core';
import { Button, Icon } from '@alifd/next';
import Area from '../area';
import { PanelConfig } from '../types';
import Panel from '../widget/panel';
import { Designer } from '@ali/lowcode-designer';

@observer
export default class LeftFixedPane extends Component<{ area: Area<PanelConfig, Panel> }> {
  shouldComponentUpdate() {
    return false;
  }
  componentDidUpdate() {
    // FIXME: dirty fix, need deep think
    this.props.area.skeleton.editor.get(Designer)?.touchOffsetObserver();
  }
  render() {
    const { area } = this.props;
    const hideTitleBar = area.current?.config.props?.hideTitleBar;
    return (
      <div
        className={classNames('lc-left-fixed-pane', {
          'lc-area-visible': area.visible,
        })}
      >
        {!hideTitleBar && (
          <Button
            text
            className="lc-pane-close"
            onClick={() => {
              area.setVisible(false);
            }}
          >
            <Icon type="close" />
          </Button>
        )}
        <Contents area={area} />
      </div>
    );
  }
}

@observer
class Contents extends Component<{ area: Area<PanelConfig, Panel> }> {
  shouldComponentUpdate() {
    return false;
  }
  render() {
    const { area } = this.props;
    return <Fragment>{area.container.items.map((panel) => panel.content)}</Fragment>;
  }
}