semantic-ui-react/dist/es/lib/factories.js

The official Semantic-UI-React integration.

import _extends from 'babel-runtime/helpers/extends';
import _isFunction from 'lodash/isFunction';
import _isArray from 'lodash/isArray';
import _isPlainObject from 'lodash/isPlainObject';
import _isNumber from 'lodash/isNumber';
import _isString from 'lodash/isString';

import cx from 'classnames';
import React, { cloneElement, isValidElement } from 'react';

// ============================================================
// Factories
// ============================================================

/**
 * A more robust React.createElement. It can create elements from primitive values.
 *
 * @param {function|string} Component A ReactClass or string
 * @param {function} mapValueToProps A function that maps a primitive value to the Component props
 * @param {string|object|function} val The value to create a ReactElement from
 * @param {object|function} [defaultProps={}] Default props object or function (called with regular props).
 * @param {boolean} [generateKey=false] Whether or not to generate a child key, useful for collections.
 * @returns {object|null}
 */
export function createShorthand(Component, mapValueToProps, val) {
  var defaultProps = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  var generateKey = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;

  if (typeof Component !== 'function' && typeof Component !== 'string') {
    throw new Error('createShorthandFactory() Component must be a string or function.');
  }
  // short circuit for disabling shorthand
  if (val === null) return null;
  var valIsString = _isString(val);
  var valIsNumber = _isNumber(val);

  var isReactElement = isValidElement(val);
  var isPropsObject = _isPlainObject(val);
  var isPrimitiveValue = valIsString || valIsNumber || _isArray(val);

  // ----------------------------------------
  // Build up props
  // ----------------------------------------

  // User's props
  var usersProps = isReactElement && val.props || isPropsObject && val || isPrimitiveValue && mapValueToProps(val);

  // Default props
  defaultProps = _isFunction(defaultProps) ? defaultProps(usersProps) : defaultProps;

  // Merge props
  /* eslint-disable react/prop-types */
  var props = _extends({}, defaultProps, usersProps);

  // Merge className
  if (usersProps.className && defaultProps.className) {
    props.className = cx(defaultProps.className, usersProps.className);
  }

  // Merge style
  if (usersProps.style && defaultProps.style) {
    props.style = _extends({}, defaultProps.style, usersProps.style);
  }

  // ----------------------------------------
  // Get key
  // ----------------------------------------

  // Use key, childKey, or generate key
  if (!props.key) {
    var childKey = props.childKey;


    if (childKey) {
      // apply and consume the childKey
      props.key = typeof childKey === 'function' ? childKey(props) : childKey;
      delete props.childKey;
    } else if (generateKey && (valIsString || valIsNumber)) {
      // use string/number shorthand values as the key
      props.key = val;
    }
  }
  /* eslint-enable react/prop-types */

  // ----------------------------------------
  // Create Element
  // ----------------------------------------

  // Clone ReactElements
  if (isReactElement) return cloneElement(val, props);

  // Create ReactElements from built up props
  if (isPrimitiveValue || isPropsObject) return React.createElement(Component, props);

  // Otherwise null
  return null;
}

// ============================================================
// Factory Creators
// ============================================================

/**
 * Creates a `createShorthand` function that is waiting for a value and defaultProps.
 *
 * @param {function|string} Component A ReactClass or string
 * @param {function} mapValueToProps A function that maps a primitive value to the Component props
 * @param {boolean} [generateKey] Whether or not to generate a child key, useful for collections.
 * @returns {function} A shorthand factory function waiting for `val` and `defaultProps`.
 */
createShorthand.handledProps = [];
export function createShorthandFactory(Component, mapValueToProps, generateKey) {
  if (typeof Component !== 'function' && typeof Component !== 'string') {
    throw new Error('createShorthandFactory() Component must be a string or function.');
  }

  return function (val, defaultProps) {
    return createShorthand(Component, mapValueToProps, val, defaultProps, generateKey);
  };
}

// ============================================================
// HTML Factories
// ============================================================
export var createHTMLImage = createShorthandFactory('img', function (value) {
  return { src: value };
});
export var createHTMLInput = createShorthandFactory('input', function (value) {
  return { type: value };
});
export var createHTMLLabel = createShorthandFactory('label', function (value) {
  return { children: value };
});