jiti-meet/react/features/mobile/image-cache/functions.js

32 lines
1.2 KiB
JavaScript

import { ImageCache } from 'react-native-img-cache';
/**
* Notifies about the successful download of an <tt>Image</tt> source. The name
* is inspired by <tt>Image</tt>. The downloaded <tt>Image</tt> source is not
* available because (1) I do not know how to get it from {@link ImageCache} and
* (2) we do not need it bellow. The function was explicitly introduced to cut
* down on unnecessary <tt>ImageCache</tt> <tt>observer</tt> instances.
*
* @private
* @returns {void}
*/
function _onLoad() {
// ImageCache requires an observer; otherwise, we do not need it because we
// merely want to initiate the download and do not care what happens with it
// afterwards.
}
/**
* Initiates the retrieval of a specific <tt>Image</tt> source (if it has not
* been initiated already). Due to limitations of {@link ImageCache}, the source
* may have at most one <tt>uri</tt>. The name is inspired by <tt>Image</tt>.
*
* @param {Object} source - The <tt>Image</tt> source with preferably exactly
* one <tt>uri</tt>.
* @public
* @returns {void}
*/
export function prefetch(source) {
ImageCache.get().on(source, /* observer */ _onLoad, /* immutable */ true);
}