react-native/Libraries/Image/ImageSourcePropType.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ImageSourcePropType
 * @no-flow
 * @format
 */
'use strict';

const PropTypes = require('prop-types');

const ImageURISourcePropType = PropTypes.shape({
  /**
   * `uri` is a string representing the resource identifier for the image, which
   * could be an http address, a local file path, or the name of a static image
   * resource (which should be wrapped in the `require('./path/to/image.png')`
   * function).
   */
  uri: PropTypes.string,
  /**
   * `bundle` is the iOS asset bundle which the image is included in. This
   * will default to [NSBundle mainBundle] if not set.
   * @platform ios
   */
  bundle: PropTypes.string,
  /**
   * `method` is the HTTP Method to use. Defaults to GET if not specified.
   */
  method: PropTypes.string,
  /**
   * `headers` is an object representing the HTTP headers to send along with the
   * request for a remote image.
   */
  headers: PropTypes.objectOf(PropTypes.string),
  /**
   * `body` is the HTTP body to send with the request. This must be a valid
   * UTF-8 string, and will be sent exactly as specified, with no
   * additional encoding (e.g. URL-escaping or base64) applied.
   */
  body: PropTypes.string,
  /**
   * `cache` determines how the requests handles potentially cached
   * responses.
   *
   * - `default`: Use the native platforms default strategy. `useProtocolCachePolicy` on iOS.
   *
   * - `reload`: The data for the URL will be loaded from the originating source.
   * No existing cache data should be used to satisfy a URL load request.
   *
   * - `force-cache`: The existing cached data will be used to satisfy the request,
   * regardless of its age or expiration date. If there is no existing data in the cache
   * corresponding the request, the data is loaded from the originating source.
   *
   * - `only-if-cached`: The existing cache data will be used to satisfy a request, regardless of
   * its age or expiration date. If there is no existing data in the cache corresponding
   * to a URL load request, no attempt is made to load the data from the originating source,
   * and the load is considered to have failed.
   *
   * @platform ios
   */
  cache: PropTypes.oneOf([
    'default',
    'reload',
    'force-cache',
    'only-if-cached',
  ]),
  /**
   * `width` and `height` can be specified if known at build time, in which case
   * these will be used to set the default `<Image/>` component dimensions.
   */
  width: PropTypes.number,
  height: PropTypes.number,
  /**
   * `scale` is used to indicate the scale factor of the image. Defaults to 1.0 if
   * unspecified, meaning that one image pixel equates to one display point / DIP.
   */
  scale: PropTypes.number,
});

const ImageSourcePropType = PropTypes.oneOfType([
  ImageURISourcePropType,
  // Opaque type returned by require('./image.jpg')
  PropTypes.number,
  // Multiple sources
  PropTypes.arrayOf(ImageURISourcePropType),
]);

module.exports = ImageSourcePropType;