Allow [path.fromUri] to take a string as well as a URI.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//203673003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/path@34067 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..0d48c07
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,3 @@
+# 1.1.0
+
+* `path.fromUri` now accepts strings as well as `Uri` objects.
diff --git a/lib/path.dart b/lib/path.dart
index 7ff858c..524f16d 100644
--- a/lib/path.dart
+++ b/lib/path.dart
@@ -322,23 +322,27 @@
 ///     withoutExtension('path/to/foo.dart'); // -> 'path/to/foo'
 String withoutExtension(String path) => _context.withoutExtension(path);
 
-/// Returns the path represented by [uri].
+/// Returns the path represented by [uri], which may be a [String] or a [Uri].
 ///
 /// For POSIX and Windows styles, [uri] must be a `file:` URI. For the URL
 /// style, this will just convert [uri] to a string.
 ///
 ///     // POSIX
-///     path.fromUri(Uri.parse('file:///path/to/foo'))
+///     context.fromUri('file:///path/to/foo')
 ///       // -> '/path/to/foo'
 ///
 ///     // Windows
-///     path.fromUri(Uri.parse('file:///C:/path/to/foo'))
+///     context.fromUri('file:///C:/path/to/foo')
 ///       // -> r'C:\path\to\foo'
 ///
 ///     // URL
-///     path.fromUri(Uri.parse('http://dartlang.org/path/to/foo'))
+///     context.fromUri('http://dartlang.org/path/to/foo')
 ///       // -> 'http://dartlang.org/path/to/foo'
-String fromUri(Uri uri) => _context.fromUri(uri);
+///
+/// If [uri] is relative, a relative path will be returned.
+///
+///     path.fromUri('path/to/foo'); // -> 'path/to/foo'
+String fromUri(uri) => _context.fromUri(uri);
 
 /// Returns the URI that represents [path].
 ///
diff --git a/lib/src/context.dart b/lib/src/context.dart
index b897c8b..9c8e1e4 100644
--- a/lib/src/context.dart
+++ b/lib/src/context.dart
@@ -423,23 +423,30 @@
     return parsed.toString();
   }
 
-  /// Returns the path represented by [uri].
+  /// Returns the path represented by [uri], which may be a [String] or a [Uri].
   ///
   /// For POSIX and Windows styles, [uri] must be a `file:` URI. For the URL
   /// style, this will just convert [uri] to a string.
   ///
   ///     // POSIX
-  ///     context.fromUri(Uri.parse('file:///path/to/foo'))
+  ///     context.fromUri('file:///path/to/foo')
   ///       // -> '/path/to/foo'
   ///
   ///     // Windows
-  ///     context.fromUri(Uri.parse('file:///C:/path/to/foo'))
+  ///     context.fromUri('file:///C:/path/to/foo')
   ///       // -> r'C:\path\to\foo'
   ///
   ///     // URL
-  ///     context.fromUri(Uri.parse('http://dartlang.org/path/to/foo'))
+  ///     context.fromUri('http://dartlang.org/path/to/foo')
   ///       // -> 'http://dartlang.org/path/to/foo'
-  String fromUri(Uri uri) => style.pathFromUri(uri);
+  ///
+  /// If [uri] is relative, a relative path will be returned.
+  ///
+  ///     path.fromUri('path/to/foo'); // -> 'path/to/foo'
+  String fromUri(uri) {
+    if (uri is String) uri = Uri.parse(uri);
+    return style.pathFromUri(uri);
+  }
 
   /// Returns the URI that represents [path].
   ///
diff --git a/pubspec.yaml b/pubspec.yaml
index 3b555a1..8095c88 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: path
-version: 1.0.0
+version: 1.1.0
 author: Dart Team <misc@dartlang.org>
 description: >
  A string-based path manipulation library. All of the path operations you know
diff --git a/test/posix_test.dart b/test/posix_test.dart
index 83a473e..9da97c9 100644
--- a/test/posix_test.dart
+++ b/test/posix_test.dart
@@ -474,19 +474,26 @@
     expect(context.withoutExtension('a/b.c//'), 'a/b//');
   });
 
-  test('fromUri', () {
-    expect(context.fromUri(Uri.parse('file:///path/to/foo')), '/path/to/foo');
-    expect(context.fromUri(Uri.parse('file:///path/to/foo/')), '/path/to/foo/');
-    expect(context.fromUri(Uri.parse('file:///')), '/');
-    expect(context.fromUri(Uri.parse('foo/bar')), 'foo/bar');
-    expect(context.fromUri(Uri.parse('/path/to/foo')), '/path/to/foo');
-    expect(context.fromUri(Uri.parse('///path/to/foo')), '/path/to/foo');
-    expect(context.fromUri(Uri.parse('file:///path/to/foo%23bar')),
-        '/path/to/foo#bar');
-    expect(context.fromUri(Uri.parse('_%7B_%7D_%60_%5E_%20_%22_%25_')),
-        r'_{_}_`_^_ _"_%_');
-    expect(() => context.fromUri(Uri.parse('http://dartlang.org')),
-        throwsArgumentError);
+  group('fromUri', () {
+    test('with a URI', () {
+      expect(context.fromUri(Uri.parse('file:///path/to/foo')), '/path/to/foo');
+      expect(context.fromUri(Uri.parse('file:///path/to/foo/')),
+          '/path/to/foo/');
+      expect(context.fromUri(Uri.parse('file:///')), '/');
+      expect(context.fromUri(Uri.parse('foo/bar')), 'foo/bar');
+      expect(context.fromUri(Uri.parse('/path/to/foo')), '/path/to/foo');
+      expect(context.fromUri(Uri.parse('///path/to/foo')), '/path/to/foo');
+      expect(context.fromUri(Uri.parse('file:///path/to/foo%23bar')),
+          '/path/to/foo#bar');
+      expect(context.fromUri(Uri.parse('_%7B_%7D_%60_%5E_%20_%22_%25_')),
+          r'_{_}_`_^_ _"_%_');
+      expect(() => context.fromUri(Uri.parse('http://dartlang.org')),
+          throwsArgumentError);
+    });
+
+    test('with a string', () {
+      expect(context.fromUri('file:///path/to/foo'), '/path/to/foo');
+    });
   });
 
   test('toUri', () {
diff --git a/test/url_test.dart b/test/url_test.dart
index e149b4f..58c7b92 100644
--- a/test/url_test.dart
+++ b/test/url_test.dart
@@ -700,20 +700,28 @@
     expect(context.withoutExtension('a/b.c//'), 'a/b//');
   });
 
-  test('fromUri', () {
-    expect(context.fromUri(Uri.parse('http://dartlang.org/path/to/foo')),
-        'http://dartlang.org/path/to/foo');
-    expect(context.fromUri(Uri.parse('http://dartlang.org/path/to/foo/')),
-        'http://dartlang.org/path/to/foo/');
-    expect(context.fromUri(Uri.parse('file:///path/to/foo')),
-        'file:///path/to/foo');
-    expect(context.fromUri(Uri.parse('foo/bar')), 'foo/bar');
-    expect(context.fromUri(Uri.parse('http://dartlang.org/path/to/foo%23bar')),
-        'http://dartlang.org/path/to/foo%23bar');
-    // Since the resulting "path" is also a URL, special characters should
-    // remain percent-encoded in the result.
-    expect(context.fromUri(Uri.parse('_%7B_%7D_%60_%5E_%20_%22_%25_')),
-        r'_%7B_%7D_%60_%5E_%20_%22_%25_');
+  group('fromUri', () {
+    test('with a URI', () {
+      expect(context.fromUri(Uri.parse('http://dartlang.org/path/to/foo')),
+          'http://dartlang.org/path/to/foo');
+      expect(context.fromUri(Uri.parse('http://dartlang.org/path/to/foo/')),
+          'http://dartlang.org/path/to/foo/');
+      expect(context.fromUri(Uri.parse('file:///path/to/foo')),
+          'file:///path/to/foo');
+      expect(context.fromUri(Uri.parse('foo/bar')), 'foo/bar');
+      expect(context.fromUri(
+          Uri.parse('http://dartlang.org/path/to/foo%23bar')),
+          'http://dartlang.org/path/to/foo%23bar');
+      // Since the resulting "path" is also a URL, special characters should
+      // remain percent-encoded in the result.
+      expect(context.fromUri(Uri.parse('_%7B_%7D_%60_%5E_%20_%22_%25_')),
+          r'_%7B_%7D_%60_%5E_%20_%22_%25_');
+    });
+
+    test('with a string', () {
+      expect(context.fromUri('http://dartlang.org/path/to/foo'),
+          'http://dartlang.org/path/to/foo');
+    });
   });
 
   test('toUri', () {
diff --git a/test/windows_test.dart b/test/windows_test.dart
index e5dcac4..d194663 100644
--- a/test/windows_test.dart
+++ b/test/windows_test.dart
@@ -590,27 +590,35 @@
     expect(context.withoutExtension(r'a\b.c\'), r'a\b\');
   });
 
-  test('fromUri', () {
-    expect(context.fromUri(Uri.parse('file:///C:/path/to/foo')),
-        r'C:\path\to\foo');
-    expect(context.fromUri(Uri.parse('file://server/share/path/to/foo')),
-        r'\\server\share\path\to\foo');
-    expect(context.fromUri(Uri.parse('file:///C:/')), r'C:\');
-    expect(context.fromUri(Uri.parse('file://server/share')),
-        r'\\server\share');
-    expect(context.fromUri(Uri.parse('foo/bar')), r'foo\bar');
-    expect(context.fromUri(Uri.parse('/C:/path/to/foo')), r'C:\path\to\foo');
-    expect(context.fromUri(Uri.parse('///C:/path/to/foo')), r'C:\path\to\foo');
-    expect(context.fromUri(Uri.parse('//server/share/path/to/foo')),
-        r'\\server\share\path\to\foo');
-    expect(context.fromUri(Uri.parse('file:///C:/path/to/foo%23bar')),
-        r'C:\path\to\foo#bar');
-    expect(context.fromUri(Uri.parse('file://server/share/path/to/foo%23bar')),
-        r'\\server\share\path\to\foo#bar');
-    expect(context.fromUri(Uri.parse('_%7B_%7D_%60_%5E_%20_%22_%25_')),
-        r'_{_}_`_^_ _"_%_');
-    expect(() => context.fromUri(Uri.parse('http://dartlang.org')),
-        throwsArgumentError);
+  group('fromUri', () {
+    test('with a URI', () {
+      expect(context.fromUri(Uri.parse('file:///C:/path/to/foo')),
+          r'C:\path\to\foo');
+      expect(context.fromUri(Uri.parse('file://server/share/path/to/foo')),
+          r'\\server\share\path\to\foo');
+      expect(context.fromUri(Uri.parse('file:///C:/')), r'C:\');
+      expect(context.fromUri(Uri.parse('file://server/share')),
+          r'\\server\share');
+      expect(context.fromUri(Uri.parse('foo/bar')), r'foo\bar');
+      expect(context.fromUri(Uri.parse('/C:/path/to/foo')), r'C:\path\to\foo');
+      expect(context.fromUri(Uri.parse('///C:/path/to/foo')),
+          r'C:\path\to\foo');
+      expect(context.fromUri(Uri.parse('//server/share/path/to/foo')),
+          r'\\server\share\path\to\foo');
+      expect(context.fromUri(Uri.parse('file:///C:/path/to/foo%23bar')),
+          r'C:\path\to\foo#bar');
+      expect(context.fromUri(
+          Uri.parse('file://server/share/path/to/foo%23bar')),
+          r'\\server\share\path\to\foo#bar');
+      expect(context.fromUri(Uri.parse('_%7B_%7D_%60_%5E_%20_%22_%25_')),
+          r'_{_}_`_^_ _"_%_');
+      expect(() => context.fromUri(Uri.parse('http://dartlang.org')),
+          throwsArgumentError);
+    });
+
+    test('with a string', () {
+      expect(context.fromUri('file:///C:/path/to/foo'), r'C:\path\to\foo');
+    });
   });
 
   test('toUri', () {