| // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'dart:async' show Future, Stream; |
| import 'dart:convert' show Encoding; |
| |
| import 'resolve.dart'; |
| import 'resource_loader.dart'; |
| |
| /// Implementation of [ResourceLoader] that accepts relative and package: URIs. |
| /// |
| /// Acts like the `loader` it is provided with except that it resolves |
| /// package URIs and relative URI references before loading them. |
| /// |
| /// This class may be useful when you don't want to bother creating a resource |
| /// object, and just want to load a package resource directly. |
| class PackageLoader implements ResourceLoader { |
| final ResourceLoader _loader; |
| const PackageLoader(ResourceLoader loader) : _loader = loader; |
| |
| @override |
| Stream<List<int>> openRead(Uri uri) async* { |
| yield* _loader.openRead(await resolveUri(uri)); |
| } |
| |
| @override |
| Future<List<int>> readAsBytes(Uri uri) async => |
| _loader.readAsBytes(await resolveUri(uri)); |
| |
| @override |
| Future<String> readAsString(Uri uri, {Encoding encoding}) async => |
| _loader.readAsString(await resolveUri(uri), encoding: encoding); |
| } |