104 lines
3.0 KiB
JavaScript
104 lines
3.0 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule resolveAssetSource
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* @flow
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*
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* Resolves an asset into a `source` for `Image`.
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*/
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'use strict';
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const AssetRegistry = require('AssetRegistry');
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const AssetSourceResolver = require('AssetSourceResolver');
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const NativeModules = require('NativeModules');
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import type { ResolvedAssetSource } from 'AssetSourceResolver';
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let _customSourceTransformer, _serverURL, _scriptURL, _embeddedBundleURL;
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function getDevServerURL(): ?string {
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if (_serverURL === undefined) {
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var scriptURL = NativeModules.SourceCode.scriptURL;
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var match = scriptURL && scriptURL.match(/^https?:\/\/.*?\//);
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if (match) {
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// jsBundle was loaded from network
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_serverURL = match[0];
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} else {
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// jsBundle was loaded from file
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_serverURL = null;
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}
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}
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return _serverURL;
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}
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function _coerceLocalScriptURL(scriptURL: ?string): ?string {
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if (scriptURL) {
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if (scriptURL.startsWith('assets://')) {
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// android: running from within assets, no offline path to use
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return null;
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}
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scriptURL = scriptURL.substring(0, scriptURL.lastIndexOf('/') + 1);
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if (!scriptURL.includes('://')) {
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// Add file protocol in case we have an absolute file path and not a URL.
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// This shouldn't really be necessary. scriptURL should be a URL.
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scriptURL = 'file://' + scriptURL;
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}
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}
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return scriptURL;
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}
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function getScriptURL(): ?string {
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if (_scriptURL === undefined) {
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const scriptURL = NativeModules.SourceCode.scriptURL;
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_scriptURL = _coerceLocalScriptURL(scriptURL);
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}
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return _scriptURL;
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}
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function getEmbeddedBundledURL(): ?string {
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const scriptURL = NativeModules.SourceCode.embeddedBundleURL;
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_embeddedBundleURL = _coerceLocalScriptURL(scriptURL);
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return _embeddedBundleURL;
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}
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function setCustomSourceTransformer(
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transformer: (resolver: AssetSourceResolver) => ResolvedAssetSource,
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): void {
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_customSourceTransformer = transformer;
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}
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/**
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* `source` is either a number (opaque type returned by require('./foo.png'))
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* or an `ImageSource` like { uri: '<http location || file path>' }
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*/
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function resolveAssetSource(source: any): ?ResolvedAssetSource {
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if (typeof source === 'object') {
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return source;
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}
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var asset = AssetRegistry.getAssetByID(source);
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if (!asset) {
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return null;
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}
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const resolver = new AssetSourceResolver(
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getDevServerURL(),
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getScriptURL(),
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getEmbeddedBundledURL(),
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asset,
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);
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if (_customSourceTransformer) {
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return _customSourceTransformer(resolver);
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}
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return resolver.defaultAsset();
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}
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module.exports = resolveAssetSource;
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module.exports.pickScale = AssetSourceResolver.pickScale;
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module.exports.setCustomSourceTransformer = setCustomSourceTransformer;
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