@material-ui/core/esm/InputLabel/InputLabel.js

React components that implement Google's Material Design.

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutProperties from "@babel/runtime/helpers/esm/objectWithoutProperties";
import React from 'react';
import PropTypes from 'prop-types';
import clsx from 'clsx';
import formControlState from '../FormControl/formControlState';
import useFormControl from '../FormControl/useFormControl';
import withStyles from '../styles/withStyles';
import FormLabel from '../FormLabel';
export var styles = function styles(theme) {
  return {
    /* Styles applied to the root element. */
    root: {
      display: 'block',
      transformOrigin: 'top left'
    },

    /* Pseudo-class applied to the root element if `focused={true}`. */
    focused: {},

    /* Pseudo-class applied to the root element if `disabled={true}`. */
    disabled: {},

    /* Pseudo-class applied to the root element if `error={true}`. */
    error: {},

    /* Pseudo-class applied to the root element if `required={true}`. */
    required: {},

    /* Pseudo-class applied to the asterisk element. */
    asterisk: {},

    /* Styles applied to the root element if the component is a descendant of `FormControl`. */
    formControl: {
      position: 'absolute',
      left: 0,
      top: 0,
      // slight alteration to spec spacing to match visual spec result
      transform: 'translate(0, 24px) scale(1)'
    },

    /* Styles applied to the root element if `margin="dense"`. */
    marginDense: {
      // Compensation for the `Input.inputDense` style.
      transform: 'translate(0, 21px) scale(1)'
    },

    /* Styles applied to the `input` element if `shrink={true}`. */
    shrink: {
      transform: 'translate(0, 1.5px) scale(0.75)',
      transformOrigin: 'top left'
    },

    /* Styles applied to the `input` element if `disableAnimation={false}`. */
    animated: {
      transition: theme.transitions.create(['color', 'transform'], {
        duration: theme.transitions.duration.shorter,
        easing: theme.transitions.easing.easeOut
      })
    },

    /* Styles applied to the root element if `variant="filled"`. */
    filled: {
      // Chrome's autofill feature gives the input field a yellow background.
      // Since the input field is behind the label in the HTML tree,
      // the input field is drawn last and hides the label with an opaque background color.
      // zIndex: 1 will raise the label above opaque background-colors of input.
      zIndex: 1,
      pointerEvents: 'none',
      transform: 'translate(12px, 20px) scale(1)',
      '&$marginDense': {
        transform: 'translate(12px, 17px) scale(1)'
      },
      '&$shrink': {
        transform: 'translate(12px, 10px) scale(0.75)',
        '&$marginDense': {
          transform: 'translate(12px, 7px) scale(0.75)'
        }
      }
    },

    /* Styles applied to the root element if `variant="outlined"`. */
    outlined: {
      // see comment above on filled.zIndex
      zIndex: 1,
      pointerEvents: 'none',
      transform: 'translate(14px, 20px) scale(1)',
      '&$marginDense': {
        transform: 'translate(14px, 12px) scale(1)'
      },
      '&$shrink': {
        transform: 'translate(14px, -6px) scale(0.75)'
      }
    }
  };
};
var InputLabel = React.forwardRef(function InputLabel(props, ref) {
  var classes = props.classes,
      className = props.className,
      _props$disableAnimati = props.disableAnimation,
      disableAnimation = _props$disableAnimati === void 0 ? false : _props$disableAnimati,
      margin = props.margin,
      shrinkProp = props.shrink,
      variant = props.variant,
      other = _objectWithoutProperties(props, ["classes", "className", "disableAnimation", "margin", "shrink", "variant"]);

  var muiFormControl = useFormControl();
  var shrink = shrinkProp;

  if (typeof shrink === 'undefined' && muiFormControl) {
    shrink = muiFormControl.filled || muiFormControl.focused || muiFormControl.adornedStart;
  }

  var fcs = formControlState({
    props: props,
    muiFormControl: muiFormControl,
    states: ['margin', 'variant']
  });
  return React.createElement(FormLabel, _extends({
    "data-shrink": shrink,
    className: clsx(classes.root, className, muiFormControl && classes.formControl, !disableAnimation && classes.animated, shrink && classes.shrink, {
      dense: classes.marginDense
    }[fcs.margin], {
      filled: classes.filled,
      outlined: classes.outlined
    }[fcs.variant]),
    classes: {
      focused: classes.focused,
      disabled: classes.disabled,
      error: classes.error,
      required: classes.required,
      asterisk: classes.asterisk
    },
    ref: ref
  }, other));
});
process.env.NODE_ENV !== "production" ? InputLabel.propTypes = {
  /**
   * The contents of the `InputLabel`.
   */
  children: PropTypes.node,

  /**
   * Override or extend the styles applied to the component.
   * See [CSS API](#css) below for more details.
   */
  classes: PropTypes.object.isRequired,

  /**
   * @ignore
   */
  className: PropTypes.string,

  /**
   * If `true`, the transition animation is disabled.
   */
  disableAnimation: PropTypes.bool,

  /**
   * If `true`, apply disabled class.
   */
  disabled: PropTypes.bool,

  /**
   * If `true`, the label will be displayed in an error state.
   */
  error: PropTypes.bool,

  /**
   * If `true`, the input of this label is focused.
   */
  focused: PropTypes.bool,

  /**
   * If `dense`, will adjust vertical spacing. This is normally obtained via context from
   * FormControl.
   */
  margin: PropTypes.oneOf(['dense']),

  /**
   * if `true`, the label will indicate that the input is required.
   */
  required: PropTypes.bool,

  /**
   * If `true`, the label is shrunk.
   */
  shrink: PropTypes.bool,

  /**
   * The variant to use.
   */
  variant: PropTypes.oneOf(['standard', 'outlined', 'filled'])
} : void 0;
export default withStyles(styles, {
  name: 'MuiInputLabel'
})(InputLabel);