| // Copyright (c) 2012, 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. |
| |
| library console; |
| |
| import 'dart:async'; |
| import 'dart:convert'; |
| import 'dart:io'; |
| import 'package:polymer/src/file_system.dart'; |
| |
| /** File system implementation for console VM (i.e. no browser). */ |
| class ConsoleFileSystem implements FileSystem { |
| |
| /** Pending futures for file write requests. */ |
| final _pending = <String, Future>{}; |
| |
| Future flush() => Future.wait(_pending.values.toList()); |
| |
| void writeString(String path, String text) { |
| if(!_pending.containsKey(path)) { |
| _pending[path] = new File(path).open(mode: FileMode.WRITE) |
| .then((file) => file.writeString(text)) |
| .then((file) => file.close()) |
| .whenComplete(() { _pending.remove(path); }); |
| } |
| } |
| |
| // TODO(jmesserly): even better would be to pass the RandomAccessFile directly |
| // to html5lib. This will require a further restructuring of FileSystem. |
| // Probably it just needs "readHtml" and "readText" methods. |
| Future<List<int>> readTextOrBytes(String path) { |
| return new File(path).open().then( |
| (file) => file.length().then((length) { |
| // TODO(jmesserly): is this guaranteed to read all of the bytes? |
| var buffer = new List<int>(length); |
| return file.readInto(buffer, 0, length) |
| .then((_) => file.close()) |
| .then((_) => buffer); |
| })); |
| } |
| |
| // TODO(jmesserly): do we support any encoding other than UTF-8 for Dart? |
| Future<String> readText(String path) { |
| return readTextOrBytes(path).then(UTF8.decode); |
| } |
| } |