@material-ui/core/es/Tab/Tab.js

React components that implement Google's Material Design.

import _extends from "@babel/runtime/helpers/builtin/extends";
import _objectWithoutProperties from "@babel/runtime/helpers/builtin/objectWithoutProperties";
import _objectSpread from "@babel/runtime/helpers/builtin/objectSpread";
// @inheritedComponent ButtonBase
import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import withStyles from '../styles/withStyles';
import ButtonBase from '../ButtonBase';
import { capitalize } from '../utils/helpers';
import unsupportedProp from '../utils/unsupportedProp';
export const styles = theme => ({
  root: _objectSpread({}, theme.typography.button, {
    maxWidth: 264,
    position: 'relative',
    minWidth: 72,
    padding: 0,
    minHeight: 48,
    flexShrink: 0,
    overflow: 'hidden',
    [theme.breakpoints.up('md')]: {
      minWidth: 160
    }
  }),
  labelIcon: {
    minHeight: 72
  },
  textColorInherit: {
    color: 'inherit',
    opacity: 0.7,
    '&$selected': {
      opacity: 1
    },
    '&$disabled': {
      opacity: 0.4
    }
  },
  textColorPrimary: {
    color: theme.palette.text.secondary,
    '&$selected': {
      color: theme.palette.primary.main
    },
    '&$disabled': {
      color: theme.palette.text.disabled
    }
  },
  textColorSecondary: {
    color: theme.palette.text.secondary,
    '&$selected': {
      color: theme.palette.secondary.main
    },
    '&$disabled': {
      color: theme.palette.text.disabled
    }
  },
  selected: {},
  disabled: {},
  fullWidth: {
    flexShrink: 1,
    flexGrow: 1
  },
  wrapper: {
    display: 'inline-flex',
    alignItems: 'center',
    justifyContent: 'center',
    width: '100%',
    flexDirection: 'column'
  },
  labelContainer: {
    paddingTop: 6,
    paddingBottom: 6,
    paddingLeft: 12,
    paddingRight: 12,
    [theme.breakpoints.up('md')]: {
      paddingLeft: theme.spacing.unit * 3,
      paddingRight: theme.spacing.unit * 3
    }
  },
  label: {
    fontSize: theme.typography.pxToRem(14),
    whiteSpace: 'normal',
    [theme.breakpoints.up('md')]: {
      fontSize: theme.typography.pxToRem(13)
    }
  },
  labelWrapped: {
    [theme.breakpoints.down('sm')]: {
      fontSize: theme.typography.pxToRem(12)
    }
  }
});

class Tab extends React.Component {
  constructor(...args) {
    var _temp;

    return _temp = super(...args), this.state = {
      labelWrapped: false
    }, this.handleChange = event => {
      const {
        onChange,
        value,
        onClick
      } = this.props;

      if (onChange) {
        onChange(event, value);
      }

      if (onClick) {
        onClick(event);
      }
    }, this.label = undefined, this.checkTextWrap = () => {
      if (this.label) {
        const labelWrapped = this.label.getClientRects().length > 1;

        if (this.state.labelWrapped !== labelWrapped) {
          this.setState({
            labelWrapped
          });
        }
      }
    }, _temp;
  }

  componentDidMount() {
    this.checkTextWrap();
  }

  componentDidUpdate(prevProps, prevState) {
    if (this.state.labelWrapped === prevState.labelWrapped) {
      /**
       * At certain text and tab lengths, a larger font size may wrap to two lines while the smaller
       * font size still only requires one line.  This check will prevent an infinite render loop
       * fron occurring in that scenario.
       */
      this.checkTextWrap();
    }
  }

  render() {
    const _props = this.props,
          {
      classes,
      className: classNameProp,
      disabled,
      fullWidth,
      icon,
      indicator,
      label: labelProp,
      onChange,
      selected,
      textColor,
      value
    } = _props,
          other = _objectWithoutProperties(_props, ["classes", "className", "disabled", "fullWidth", "icon", "indicator", "label", "onChange", "selected", "textColor", "value"]);

    let label;

    if (labelProp !== undefined) {
      label = React.createElement("span", {
        className: classes.labelContainer
      }, React.createElement("span", {
        className: classNames(classes.label, {
          [classes.labelWrapped]: this.state.labelWrapped
        }),
        ref: node => {
          this.label = node;
        }
      }, labelProp));
    }

    const className = classNames(classes.root, classes[`textColor${capitalize(textColor)}`], {
      [classes.disabled]: disabled,
      [classes.selected]: selected,
      [classes.labelIcon]: icon && label,
      [classes.fullWidth]: fullWidth
    }, classNameProp);
    return React.createElement(ButtonBase, _extends({
      focusRipple: true,
      className: className,
      role: "tab",
      "aria-selected": selected,
      disabled: disabled
    }, other, {
      onClick: this.handleChange
    }), React.createElement("span", {
      className: classes.wrapper
    }, icon, label), indicator);
  }

}

Tab.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * This property isn't supported.
   * Use the `component` property if you need to change the children structure.
   */
  children: unsupportedProp,

  /**
   * 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,

  /**
   * If `true`, the tab will be disabled.
   */
  disabled: PropTypes.bool,

  /**
   * @ignore
   */
  fullWidth: PropTypes.bool,

  /**
   * The icon element.
   */
  icon: PropTypes.node,

  /**
   * @ignore
   * For server side rendering consideration, we let the selected tab
   * render the indicator.
   */
  indicator: PropTypes.node,

  /**
   * The label element.
   */
  label: PropTypes.node,

  /**
   * @ignore
   */
  onChange: PropTypes.func,

  /**
   * @ignore
   */
  onClick: PropTypes.func,

  /**
   * @ignore
   */
  selected: PropTypes.bool,

  /**
   * @ignore
   */
  textColor: PropTypes.oneOf(['secondary', 'primary', 'inherit']),

  /**
   * You can provide your own value. Otherwise, we fallback to the child position index.
   */
  value: PropTypes.any
} : {};
Tab.defaultProps = {
  disabled: false,
  textColor: 'inherit'
};
export default withStyles(styles, {
  name: 'MuiTab'
})(Tab);