ant-design/components/layout/Sider.tsx

// matchMedia polyfill for
// https://github.com/WickyNilliams/enquire.js/issues/82
if (typeof window !== 'undefined') {
  const matchMediaPolyfill = (mediaQuery: string): MediaQueryList => {
    return {
      media: mediaQuery,
      matches: false,
      addListener() {
      },
      removeListener() {
      },
    };
  };
  window.matchMedia = window.matchMedia || matchMediaPolyfill;
}

import * as React from 'react';
import classNames from 'classnames';
import omit from 'omit.js';
import PropTypes from 'prop-types';
import Icon from '../icon';

const dimensionMap = {
  xs: '480px',
  sm: '576px',
  md: '768px',
  lg: '992px',
  xl: '1200px',
  xxl: '1600px',
};

export type CollapseType = 'clickTrigger' | 'responsive';

export type SiderTheme = 'light' | 'dark';

export interface SiderProps extends React.HTMLAttributes<HTMLDivElement> {
  prefixCls?: string;
  collapsible?: boolean;
  collapsed?: boolean;
  defaultCollapsed?: boolean;
  reverseArrow?: boolean;
  onCollapse?: (collapsed: boolean, type: CollapseType) => void;
  trigger?: React.ReactNode;
  width?: number | string;
  collapsedWidth?: number | string;
  breakpoint?: 'xs' | 'sm' | 'md' | 'lg' | 'xl' | 'xxl';
  theme?: SiderTheme;
  onBreakpoint?: (broken: boolean) => void;
}

export interface SiderState {
  collapsed?: boolean;
  below: boolean;
  belowShow?: boolean;
}

export interface SiderContext {
  siderCollapsed: boolean;
}

const generateId = (() => {
  let i = 0;
  return (prefix: string = '') => {
    i += 1;
    return `${prefix}${i}`;
  };
})();

const isNumeric = (n: any) => {
  return !isNaN(parseFloat(n)) && isFinite(n);
};

export default class Sider extends React.Component<SiderProps, SiderState> {
  static __ANT_LAYOUT_SIDER: any = true;

  static defaultProps = {
    prefixCls: 'ant-layout-sider',
    collapsible: false,
    defaultCollapsed: false,
    reverseArrow: false,
    width: 200,
    collapsedWidth: 80,
    style: {},
    theme: 'dark' as SiderTheme,
  };

  static childContextTypes = {
    siderCollapsed: PropTypes.bool,
    collapsedWidth: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
  };

  static contextTypes = {
    siderHook: PropTypes.object,
  };

  private mql: MediaQueryList;
  private uniqueId: string;

  constructor(props: SiderProps) {
    super(props);
    this.uniqueId = generateId('ant-sider-');
    let matchMedia;
    if (typeof window !== 'undefined') {
      matchMedia = window.matchMedia;
    }
    if (matchMedia && props.breakpoint && props.breakpoint in dimensionMap) {
      this.mql = matchMedia(`(max-width: ${dimensionMap[props.breakpoint]})`);
    }
    let collapsed;
    if ('collapsed' in props) {
      collapsed = props.collapsed;
    } else {
      collapsed = props.defaultCollapsed;
    }
    this.state = {
      collapsed,
      below: false,
    };
  }

  getChildContext() {
    return {
      siderCollapsed: this.state.collapsed,
      collapsedWidth: this.props.collapsedWidth,
    };
  }

  componentWillReceiveProps(nextProps: SiderProps) {
    if ('collapsed' in nextProps) {
      this.setState({
        collapsed: nextProps.collapsed,
      });
    }
  }

  componentDidMount() {
    if (this.mql) {
      this.mql.addListener(this.responsiveHandler);
      this.responsiveHandler(this.mql);
    }

    if (this.context.siderHook) {
      this.context.siderHook.addSider(this.uniqueId);
    }
  }

  componentWillUnmount() {
    if (this.mql) {
      this.mql.removeListener(this.responsiveHandler);
    }

    if (this.context.siderHook) {
      this.context.siderHook.removeSider(this.uniqueId);
    }
  }

  responsiveHandler = (mql: MediaQueryList) => {
    this.setState({ below: mql.matches });
    const { onBreakpoint } = this.props;
    if (onBreakpoint) {
      onBreakpoint(mql.matches);
    }
    if (this.state.collapsed !== mql.matches) {
      this.setCollapsed(mql.matches, 'responsive');
    }
  }

  setCollapsed = (collapsed: boolean, type: CollapseType) => {
    if (!('collapsed' in this.props)) {
      this.setState({
        collapsed,
      });
    }
    const { onCollapse } = this.props;
    if (onCollapse) {
      onCollapse(collapsed, type);
    }
  }

  toggle = () => {
    const collapsed = !this.state.collapsed;
    this.setCollapsed(collapsed, 'clickTrigger');
  }

  belowShowChange = () => {
    this.setState({ belowShow: !this.state.belowShow });
  }

  render() {
    const { prefixCls, className, theme,
      collapsible, reverseArrow, trigger, style, width, collapsedWidth,
      ...others
    } = this.props;
    const divProps = omit(others, ['collapsed',
      'defaultCollapsed', 'onCollapse', 'breakpoint', 'onBreakpoint']);
    const rawWidth = this.state.collapsed ? collapsedWidth : width;
    // use "px" as fallback unit for width
    const siderWidth = isNumeric(rawWidth) ? `${rawWidth}px` : String(rawWidth);
    // special trigger when collapsedWidth == 0
    const zeroWidthTrigger = parseFloat(String(collapsedWidth || 0)) === 0 ? (
      <span onClick={this.toggle} className={`${prefixCls}-zero-width-trigger`}>
        <Icon type="bars" />
      </span>
    ) : null;
    const iconObj = {
      'expanded': reverseArrow ? <Icon type="right" /> : <Icon type="left" />,
      'collapsed': reverseArrow ? <Icon type="left" /> : <Icon type="right" />,
    };
    const status = this.state.collapsed ? 'collapsed' : 'expanded';
    const defaultTrigger = iconObj[status];
    const triggerDom = (
      trigger !== null ?
      zeroWidthTrigger || (
        <div className={`${prefixCls}-trigger`} onClick={this.toggle} style={{ width: siderWidth }}>
          {trigger || defaultTrigger}
        </div>
      ) : null
    );
    const divStyle = {
      ...style,
      flex: `0 0 ${siderWidth}`,
      maxWidth: siderWidth, // Fix width transition bug in IE11
      minWidth: siderWidth, // https://github.com/ant-design/ant-design/issues/6349
      width: siderWidth,
    };
    const siderCls = classNames(className, prefixCls, `${prefixCls}-${theme}`, {
      [`${prefixCls}-collapsed`]: !!this.state.collapsed,
      [`${prefixCls}-has-trigger`]: collapsible && trigger !== null && !zeroWidthTrigger,
      [`${prefixCls}-below`]: !!this.state.below,
      [`${prefixCls}-zero-width`]: parseFloat(siderWidth) === 0,
    });
    return (
      <div className={siderCls} {...divProps} style={divStyle}>
        <div className={`${prefixCls}-children`}>{this.props.children}</div>
        {collapsible || (this.state.below && zeroWidthTrigger) ? triggerDom : null}
      </div>
    );
  }
}