Refactor pkg/path.

pkg/path/lib/src/style/url.dart

+// Copyright (c) 2013, 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 path.style.url;
+
+import '../style.dart';
+
+/// The style for URL paths.
+class UrlStyle extends Style {
+  UrlStyle();
+
+  final name = 'url';
+  final separator = '/';
+  final separatorPattern = new RegExp(r'/');
+  final needsSeparatorPattern = new RegExp(
+      r"(^[a-zA-Z][-+.a-zA-Z\d]*://|[^/])$");
+  final rootPattern = new RegExp(r"[a-zA-Z][-+.a-zA-Z\d]*://[^/]*");
+  final relativeRootPattern = new RegExp(r"^/");
+
+  String pathFromUri(Uri uri) => uri.toString();
+
+  Uri relativePathToUri(String path) => Uri.parse(path);
+  Uri absolutePathToUri(String path) => Uri.parse(path);
+}