Implement fullPath method on File objects.

runtime/bin/file_impl.dart

 // Copyright (c) 2011, 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.
 
 class _FileInputStream implements FileInputStream {
   _FileInputStream(File file) {
     _file = new File(file.name);
     _file.openSync();
   }
 
@@ skipping 283 matching lines @@
   _FlushOperation(int this._id);
 
   void execute(ReceivePort port) {
     _replyPort.send(_File._flush(_id), port.toSendPort());
   }
 
   int _id;
 }
 
 
+class _FullPathOperation extends _FileOperation {
+  _FullPathOperation(String this._name);
+
+  void execute(ReceivePort port) {
+    _replyPort.send(_File._fullPath(_name), port.toSendPort());
+  }
+
+  String _name;
+}
+
+
 class _CreateOperation extends _FileOperation {
   _CreateOperation(String this._name);
 
   void execute(ReceivePort port) {
     _replyPort.send(_File._create(_name), port.toSendPort());
   }
 
   String _name;
 }
 
@@ skipping 81 matching lines @@
   static int _readList(int id, List<int> buffer, int offset, int bytes)
       native "File_ReadList";
   static int _writeByte(int id, int value) native "File_WriteByte";
   static int _writeList(int id, List<int> buffer, int offset, int bytes)
       native "File_WriteList";
   static int _writeString(int id, String string) native "File_WriteString";
   static int _position(int id) native "File_Position";
   static int _length(int id) native "File_Length";
   static int _flush(int id) native "File_Flush";
   static bool _create(String name) native "File_Create";
+  static int _fullPath(String name) native "File_FullPath";
 
   static int _checkReadWriteListArguments(int length, int offset, int bytes) {
     if (offset < 0) return offset;
     if (bytes < 0) return bytes;
     if ((offset + bytes) > length) return offset + bytes;
     return 0;
   }
 
   void exists() {
     _asyncUsed = true;
@@ skipping 317 matching lines @@
     if (_asyncUsed) {
       throw new FileIOException(
           "Mixed use of synchronous and asynchronous API");
     }
     int result = _flush(_id);
     if (result == -1) {
       throw new FileIOException("flush failed");
     }
   }
 
+  void fullPath() {
+    _asyncUsed = true;
+    var handler = _fullPathHandler;
+    if (handler == null) handler = (path) => null;
+    var handleFullPathResult = (result, ignored) {
+      if (result != null) {
+        handler(result);
+      } else if (_errorHandler != null) {
+        _errorHandler("canonicalPath failed");
+      }
+    };
+    var operation = new _FullPathOperation(_name);
+    _scheduler.enqueue(operation, handleFullPathResult);
+  }
+
+  String fullPathSync() {
+    if (_asyncUsed) {
+      throw new FileIOException(
+          "Mixed use of synchronous and asynchronous API");
+    }
+    String result = _fullPath(_name);
+    if (result == null) {
+      throw new FileIOException("fullPath failed");
+    }
+    return result;
+  }
+
   InputStream openInputStream() {
     return new _FileInputStream(this);
   }
 
   OutputStream openOutputStream() {
     return new _FileOutputStream(this);
   }
 
   String get name() {
     return _name;
@@ skipping 32 matching lines @@
   }
 
   void set lengthHandler(void handler(int length)) {
     _lengthHandler = handler;
   }
 
   void set flushHandler(void handler()) {
     _flushHandler = handler;
   }
 
+  void set fullPathHandler(void handler(String)) {
+    _fullPathHandler = handler;
+  }
+
   void set errorHandler(void handler(String error)) {
     _errorHandler = handler;
   }
 
   String _name;
   int _id;
   bool _asyncUsed;
 
   _FileOperationScheduler _scheduler;
 
   var _existsHandler;
   var _createHandler;
   var _openHandler;
   var _closeHandler;
   var _readByteHandler;
   var _readListHandler;
   var _noPendingWriteHandler;
   var _positionHandler;
   var _lengthHandler;
   var _flushHandler;
+  var _fullPathHandler;
   var _errorHandler;
 }