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

React components that implement Google's Material Design.

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import * as React from 'react';
import { isFragment } from 'react-is';
import PropTypes from 'prop-types';
import clsx from 'clsx';
import withStyles from '../styles/withStyles';
import StepperContext from '../Stepper/StepperContext';
import StepContext from './StepContext';
export const styles = {
  /* Styles applied to the root element. */
  root: {},

  /* Styles applied to the root element if `orientation="horizontal"`. */
  horizontal: {
    paddingLeft: 8,
    paddingRight: 8
  },

  /* Styles applied to the root element if `orientation="vertical"`. */
  vertical: {},

  /* Styles applied to the root element if `alternativeLabel={true}`. */
  alternativeLabel: {
    flex: 1,
    position: 'relative'
  },

  /* Pseudo-class applied to the root element if `completed={true}`. */
  completed: {}
};
const Step = /*#__PURE__*/React.forwardRef(function Step(props, ref) {
  const {
    active: activeProp,
    children,
    classes,
    className,
    completed: completedProp,
    disabled: disabledProp,
    expanded = false,
    index,
    last
  } = props,
        other = _objectWithoutPropertiesLoose(props, ["active", "children", "classes", "className", "completed", "disabled", "expanded", "index", "last"]);

  const {
    activeStep,
    connector,
    alternativeLabel,
    orientation,
    nonLinear
  } = React.useContext(StepperContext);
  let [active = false, completed = false, disabled = false] = [activeProp, completedProp, disabledProp];

  if (activeStep === index) {
    active = activeProp !== undefined ? activeProp : true;
  } else if (!nonLinear && activeStep > index) {
    completed = completedProp !== undefined ? completedProp : true;
  } else if (!nonLinear && activeStep < index) {
    disabled = disabledProp !== undefined ? disabledProp : true;
  }

  const contextValue = React.useMemo(() => ({
    index,
    last,
    expanded,
    icon: index + 1,
    active,
    completed,
    disabled
  }), [index, last, expanded, active, completed, disabled]);
  const newChildren = /*#__PURE__*/React.createElement("div", _extends({
    className: clsx(classes.root, classes[orientation], className, alternativeLabel && classes.alternativeLabel, completed && classes.completed),
    ref: ref
  }, other), connector && alternativeLabel && index !== 0 ? connector : null, React.Children.map(children, child => {
    if (! /*#__PURE__*/React.isValidElement(child)) {
      return null;
    }

    if (process.env.NODE_ENV !== 'production') {
      if (isFragment(child)) {
        console.error(["Material-UI: The Step component doesn't accept a Fragment as a child.", 'Consider providing an array instead.'].join('\n'));
      }
    }

    return /*#__PURE__*/React.cloneElement(child, _extends({}, child.props));
  }));
  return /*#__PURE__*/React.createElement(StepContext.Provider, {
    value: contextValue
  }, connector && !alternativeLabel && index !== 0 ? /*#__PURE__*/React.createElement(React.Fragment, null, connector, newChildren) : newChildren);
});
process.env.NODE_ENV !== "production" ? Step.propTypes = {
  // ----------------------------- Warning --------------------------------
  // | These PropTypes are generated from the TypeScript type definitions |
  // |     To update them edit the d.ts file and run "yarn proptypes"     |
  // ----------------------------------------------------------------------

  /**
   * Sets the step as active. Is passed to child components.
   */
  active: PropTypes.bool,

  /**
   * Should be `Step` sub-components such as `StepLabel`, `StepContent`.
   */
  children: PropTypes.node,

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

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

  /**
   * Mark the step as completed. Is passed to child components.
   */
  completed: PropTypes.bool,

  /**
   * Mark the step as disabled, will also disable the button if
   * `StepButton` is a child of `Step`. Is passed to child components.
   */
  disabled: PropTypes.bool,

  /**
   * Expand the step.
   */
  expanded: PropTypes.bool,

  /**
   * The position of the step.
   */
  index: PropTypes.number,

  /**
   * If `true`, the Step will be displayed as rendered last.
   */
  last: PropTypes.bool
} : void 0;
export default withStyles(styles, {
  name: 'MuiStep'
})(Step);