content: import React from 'react';
  import PropTypes from 'prop-types';
  import classNames from 'classnames';
  import { componentPropType } from '@material-ui/utils';
  import withStyles from '../styles/withStyles';
  import { capitalize } from '../utils/helpers';
  
  export const styles = theme => ({
    /* Styles applied to the root element. */
    root: {
      boxSizing: 'border-box',
      lineHeight: '48px',
      listStyle: 'none',
      color: theme.palette.text.secondary,
      fontFamily: theme.typography.fontFamily,
      fontWeight: theme.typography.fontWeightMedium,
      fontSize: theme.typography.pxToRem(14),
    },
    /* Styles applied to the root element if `color="primary"`. */
    colorPrimary: {
      color: theme.palette.primary.main,
    },
    /* Styles applied to the root element if `color="inherit"`. */
    colorInherit: {
      color: 'inherit',
    },
    /* Styles applied to the inner `component` element if `disableGutters={false}`. */
    gutters: {
      paddingLeft: 16,
      paddingRight: 16,
    },
    /* Styles applied to the root element if `inset={true}`. */
    inset: {
      paddingLeft: 72,
    },
    /* Styles applied to the root element if `disableSticky={false}`. */
    sticky: {
      position: 'sticky',
      top: 0,
      zIndex: 1,
      backgroundColor: 'inherit',
    },
  });
  
  function ListSubheader(props) {
    const {
      classes,
      className,
      color,
      component: Component,
      disableGutters,
      disableSticky,
      inset,
      ...other
    } = props;
  
    return (
      <Component
        className={classNames(
          classes.root,
          {
            [classes[`color${capitalize(color)}`]]: color !== 'default',
            [classes.inset]: inset,
            [classes.sticky]: !disableSticky,
            [classes.gutters]: !disableGutters,
          },
          className,
        )}
        {...other}
      />
    );
  }
  
  ListSubheader.propTypes = {
    /**
     * The content of the component.
     */
    children: PropTypes.node,
    /**
     * Override or extend the styles applied to the component.
     * See [CSS API](#css-api) below for more details.
     */
    classes: PropTypes.object.isRequired,
    /**
     * @ignore
     */
    className: PropTypes.string,
    /**
     * The color of the component. It supports those theme colors that make sense for this component.
     */
    color: PropTypes.oneOf(['default', 'primary', 'inherit']),
    /**
     * The component used for the root node.
     * Either a string to use a DOM element or a component.
     */
    component: componentPropType,
    /**
     * If `true`, the List Subheader will not have gutters.
     */
    disableGutters: PropTypes.bool,
    /**
     * If `true`, the List Subheader will not stick to the top during scroll.
     */
    disableSticky: PropTypes.bool,
    /**
     * If `true`, the List Subheader will be indented.
     */
    inset: PropTypes.bool,
  };
  
  ListSubheader.defaultProps = {
    color: 'default',
    component: 'li',
    disableGutters: false,
    disableSticky: false,
    inset: false,
  };
  
  ListSubheader.muiName = 'ListSubheader';
  
  export default withStyles(styles, { name: 'MuiListSubheader' })(ListSubheader);
  