93 lines
2.7 KiB
JavaScript
93 lines
2.7 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
* @providesModule resolveAssetSource
|
|
* @flow
|
|
*
|
|
* Resolves an asset into a `source` for `Image`.
|
|
*/
|
|
'use strict';
|
|
|
|
import type { ResolvedAssetSource } from 'AssetSourceResolver';
|
|
|
|
const AssetRegistry = require('AssetRegistry');
|
|
const AssetSourceResolver = require('AssetSourceResolver');
|
|
const { SourceCode } = require('NativeModules');
|
|
|
|
let _customSourceTransformer, _serverURL, _bundleSourcePath;
|
|
|
|
function getDevServerURL(): ?string {
|
|
if (_serverURL === undefined) {
|
|
var scriptURL = SourceCode.scriptURL;
|
|
var match = scriptURL && scriptURL.match(/^https?:\/\/.*?\//);
|
|
if (match) {
|
|
// Bundle was loaded from network
|
|
_serverURL = match[0];
|
|
} else {
|
|
// Bundle was loaded from file
|
|
_serverURL = null;
|
|
}
|
|
}
|
|
return _serverURL;
|
|
}
|
|
|
|
function getBundleSourcePath(): ?string {
|
|
if (_bundleSourcePath === undefined) {
|
|
const scriptURL = SourceCode.scriptURL;
|
|
if (!scriptURL) {
|
|
// scriptURL is falsy, we have nothing to go on here
|
|
_bundleSourcePath = null;
|
|
return _bundleSourcePath;
|
|
}
|
|
if (scriptURL.startsWith('assets://')) {
|
|
// running from within assets, no offline path to use
|
|
_bundleSourcePath = null;
|
|
return _bundleSourcePath;
|
|
}
|
|
if (scriptURL.startsWith('file://')) {
|
|
// cut off the protocol
|
|
_bundleSourcePath = scriptURL.substring(7, scriptURL.lastIndexOf('/') + 1);
|
|
} else {
|
|
_bundleSourcePath = scriptURL.substring(0, scriptURL.lastIndexOf('/') + 1);
|
|
}
|
|
}
|
|
|
|
return _bundleSourcePath;
|
|
}
|
|
|
|
function setCustomSourceTransformer(
|
|
transformer: (resolver: AssetSourceResolver) => ResolvedAssetSource,
|
|
): void {
|
|
_customSourceTransformer = transformer;
|
|
}
|
|
|
|
/**
|
|
* `source` is either a number (opaque type returned by require('./foo.png'))
|
|
* or an `ImageSource` like { uri: '<http location || file path>' }
|
|
*/
|
|
function resolveAssetSource(source: any): ?ResolvedAssetSource {
|
|
if (typeof source === 'object') {
|
|
return source;
|
|
}
|
|
|
|
var asset = AssetRegistry.getAssetByID(source);
|
|
if (!asset) {
|
|
return null;
|
|
}
|
|
|
|
const resolver = new AssetSourceResolver(getDevServerURL(), getBundleSourcePath(), asset);
|
|
if (_customSourceTransformer) {
|
|
return _customSourceTransformer(resolver);
|
|
}
|
|
return resolver.defaultAsset();
|
|
}
|
|
|
|
module.exports = resolveAssetSource;
|
|
module.exports.pickScale = AssetSourceResolver.pickScale;
|
|
module.exports.setCustomSourceTransformer = setCustomSourceTransformer;
|