Format all dart: library files

sdk/lib/async/stream_pipe.dart

 // 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.
 
 part of dart.async;
 
 /** Runs user code and takes actions depending on success or failure. */
-_runUserCode(userCode(),
-             onSuccess(value),
-             onError(error, StackTrace stackTrace)) {
+_runUserCode(
+    userCode(), onSuccess(value), onError(error, StackTrace stackTrace)) {
   try {
     onSuccess(userCode());
   } catch (e, s) {
     AsyncError replacement = Zone.current.errorCallback(e, s);
     if (replacement == null) {
       onError(e, s);
     } else {
       var error = _nonNullError(replacement.error);
       var stackTrace = replacement.stackTrace;
       onError(error, stackTrace);
     }
   }
 }
 
 /** Helper function to cancel a subscription and wait for the potential future,
   before completing with an error. */
-void _cancelAndError(StreamSubscription subscription,
-                     _Future future,
-                     error,
-                     StackTrace stackTrace) {
+void _cancelAndError(StreamSubscription subscription, _Future future, error,
+    StackTrace stackTrace) {
   var cancelFuture = subscription.cancel();
   if (cancelFuture is Future && !identical(cancelFuture, Future._nullFuture)) {
     cancelFuture.whenComplete(() => future._completeError(error, stackTrace));
   } else {
     future._completeError(error, stackTrace);
   }
 }
 
 void _cancelAndErrorWithReplacement(StreamSubscription subscription,
-                                    _Future future,
-                                    error, StackTrace stackTrace) {
+    _Future future, error, StackTrace stackTrace) {
   AsyncError replacement = Zone.current.errorCallback(error, stackTrace);
   if (replacement != null) {
     error = _nonNullError(replacement.error);
     stackTrace = replacement.stackTrace;
   }
   _cancelAndError(subscription, future, error, stackTrace);
 }
 
 typedef void _ErrorCallback(error, StackTrace stackTrace);
 
 /** Helper function to make an onError argument to [_runUserCode]. */
 _ErrorCallback _cancelAndErrorClosure(
     StreamSubscription subscription, _Future future) {
   return (error, StackTrace stackTrace) {
     _cancelAndError(subscription, future, error, stackTrace);
   };
 }
 
 /** Helper function to cancel a subscription and wait for the potential future,
   before completing with a value. */
 void _cancelAndValue(StreamSubscription subscription, _Future future, value) {
   var cancelFuture = subscription.cancel();
   if (cancelFuture is Future && !identical(cancelFuture, Future._nullFuture)) {
     cancelFuture.whenComplete(() => future._complete(value));
   } else {
     future._complete(value);
   }
 }
 
-
 /**
  * A [Stream] that forwards subscriptions to another stream.
  *
  * This stream implements [Stream], but forwards all subscriptions
  * to an underlying stream, and wraps the returned subscription to
  * modify the events on the way.
  *
  * This class is intended for internal use only.
  */
 abstract class _ForwardingStream<S, T> extends Stream<T> {
   final Stream<S> _source;
 
   _ForwardingStream(this._source);
 
   bool get isBroadcast => _source.isBroadcast;
 
   StreamSubscription<T> listen(void onData(T value),
-                              { Function onError,
-                                void onDone(),
-                                bool cancelOnError }) {
+      {Function onError, void onDone(), bool cancelOnError}) {
     cancelOnError = identical(true, cancelOnError);
     return _createSubscription(onData, onError, onDone, cancelOnError);
   }
 
-  StreamSubscription<T> _createSubscription(
-      void onData(T data),
-      Function onError,
-      void onDone(),
-      bool cancelOnError) {
+  StreamSubscription<T> _createSubscription(void onData(T data),
+      Function onError, void onDone(), bool cancelOnError) {
     return new _ForwardingStreamSubscription<S, T>(
         this, onData, onError, onDone, cancelOnError);
   }
 
   // Override the following methods in subclasses to change the behavior.
 
   void _handleData(S data, _EventSink<T> sink) {
-    sink._add(data as Object /*=T*/);
+    sink._add(data as Object/*=T*/);
   }
 
   void _handleError(error, StackTrace stackTrace, _EventSink<T> sink) {
     sink._addError(error, stackTrace);
   }
 
   void _handleDone(_EventSink<T> sink) {
     sink._close();
   }
 }
 
 /**
  * Abstract superclass for subscriptions that forward to other subscriptions.
  */
 class _ForwardingStreamSubscription<S, T>
     extends _BufferingStreamSubscription<T> {
   final _ForwardingStream<S, T> _stream;
 
   StreamSubscription<S> _subscription;
 
   _ForwardingStreamSubscription(this._stream, void onData(T data),
-                                Function onError, void onDone(),
-                                bool cancelOnError)
+      Function onError, void onDone(), bool cancelOnError)
       : super(onData, onError, onDone, cancelOnError) {
-    _subscription = _stream._source.listen(_handleData,
-                                           onError: _handleError,
-                                           onDone: _handleDone);
+    _subscription = _stream._source
+        .listen(_handleData, onError: _handleError, onDone: _handleDone);
   }
 
   // _StreamSink interface.
   // Transformers sending more than one event have no way to know if the stream
   // is canceled or closed after the first, so we just ignore remaining events.
 
   void _add(T data) {
     if (_isClosed) return;
     super._add(data);
   }
@@ skipping 47 matching lines @@
 
 void _addErrorWithReplacement(_EventSink sink, error, stackTrace) {
   AsyncError replacement = Zone.current.errorCallback(error, stackTrace);
   if (replacement != null) {
     error = _nonNullError(replacement.error);
     stackTrace = replacement.stackTrace;
   }
   sink._addError(error, stackTrace);
 }
 
-
 class _WhereStream<T> extends _ForwardingStream<T, T> {
   final _Predicate<T> _test;
 
   _WhereStream(Stream<T> source, bool test(T value))
-      : _test = test, super(source);
+      : _test = test,
+        super(source);
 
   void _handleData(T inputEvent, _EventSink<T> sink) {
     bool satisfies;
     try {
       satisfies = _test(inputEvent);
     } catch (e, s) {
       _addErrorWithReplacement(sink, e, s);
       return;
     }
     if (satisfies) {
       sink._add(inputEvent);
     }
   }
 }
 
-
 typedef T _Transformation<S, T>(S value);
 
 /**
  * A stream pipe that converts data events before passing them on.
  */
 class _MapStream<S, T> extends _ForwardingStream<S, T> {
   final _Transformation<S, T> _transform;
 
   _MapStream(Stream<S> source, T transform(S event))
-      : this._transform = transform, super(source);
+      : this._transform = transform,
+        super(source);
 
   void _handleData(S inputEvent, _EventSink<T> sink) {
     T outputEvent;
     try {
       outputEvent = _transform(inputEvent);
     } catch (e, s) {
       _addErrorWithReplacement(sink, e, s);
       return;
     }
     sink._add(outputEvent);
   }
 }
 
 /**
  * A stream pipe that converts data events before passing them on.
  */
 class _ExpandStream<S, T> extends _ForwardingStream<S, T> {
   final _Transformation<S, Iterable<T>> _expand;
 
   _ExpandStream(Stream<S> source, Iterable<T> expand(S event))
-      : this._expand = expand, super(source);
+      : this._expand = expand,
+        super(source);
 
   void _handleData(S inputEvent, _EventSink<T> sink) {
     try {
       for (T value in _expand(inputEvent)) {
         sink._add(value);
       }
     } catch (e, s) {
       // If either _expand or iterating the generated iterator throws,
       // we abort the iteration.
       _addErrorWithReplacement(sink, e, s);
     }
   }
 }
 
-
 typedef bool _ErrorTest(error);
 
 /**
  * A stream pipe that converts or disposes error events
  * before passing them on.
  */
 class _HandleErrorStream<T> extends _ForwardingStream<T, T> {
   final Function _transform;
   final _ErrorTest _test;
 
-  _HandleErrorStream(Stream<T> source,
-                     Function onError,
-                     bool test(error))
-      : this._transform = onError, this._test = test, super(source);
+  _HandleErrorStream(Stream<T> source, Function onError, bool test(error))
+      : this._transform = onError,
+        this._test = test,
+        super(source);
 
   void _handleError(Object error, StackTrace stackTrace, _EventSink<T> sink) {
     bool matches = true;
     if (_test != null) {
       try {
         matches = _test(error);
       } catch (e, s) {
         _addErrorWithReplacement(sink, e, s);
         return;
       }
     }
     if (matches) {
       try {
         _invokeErrorHandler(_transform, error, stackTrace);
       } catch (e, s) {
         if (identical(e, error)) {
           sink._addError(error, stackTrace);
         } else {
           _addErrorWithReplacement(sink, e, s);
         }
         return;
       }
     } else {
       sink._addError(error, stackTrace);
     }
   }
 }
 
-
 class _TakeStream<T> extends _ForwardingStream<T, T> {
   final int _count;
 
   _TakeStream(Stream<T> source, int count)
-      : this._count = count, super(source) {
+      : this._count = count,
+        super(source) {
     // This test is done early to avoid handling an async error
     // in the _handleData method.
     if (count is! int) throw new ArgumentError(count);
   }
 
-  StreamSubscription<T> _createSubscription(
-      void onData(T data),
-      Function onError,
-      void onDone(),
-      bool cancelOnError) {
+  StreamSubscription<T> _createSubscription(void onData(T data),
+      Function onError, void onDone(), bool cancelOnError) {
     if (_count == 0) {
       _source.listen(null).cancel();
       return new _DoneStreamSubscription<T>(onDone);
     }
     return new _StateStreamSubscription<T>(
         this, onData, onError, onDone, cancelOnError, _count);
   }
 
   void _handleData(T inputEvent, _EventSink<T> sink) {
     _StateStreamSubscription<T> subscription = sink;
@@ skipping 14 matching lines @@
 /**
  * A [_ForwardingStreamSubscription] with one extra state field.
  *
  * Use by several different classes, some storing an integer, others a bool.
  */
 class _StateStreamSubscription<T> extends _ForwardingStreamSubscription<T, T> {
   // Raw state field. Typed access provided by getters and setters below.
   var _sharedState;
 
   _StateStreamSubscription(_ForwardingStream<T, T> stream, void onData(T data),
-                           Function onError, void onDone(),
-                           bool cancelOnError, this._sharedState)
+      Function onError, void onDone(), bool cancelOnError, this._sharedState)
       : super(stream, onData, onError, onDone, cancelOnError);
 
   bool get _flag => _sharedState;
-  void set _flag(bool flag) { _sharedState = flag; }
+  void set _flag(bool flag) {
+    _sharedState = flag;
+  }
+
   int get _count => _sharedState;
-  void set _count(int count) { _sharedState = count; }
+  void set _count(int count) {
+    _sharedState = count;
+  }
 }
 
-
 class _TakeWhileStream<T> extends _ForwardingStream<T, T> {
   final _Predicate<T> _test;
 
   _TakeWhileStream(Stream<T> source, bool test(T value))
-      : this._test = test, super(source);
+      : this._test = test,
+        super(source);
 
   void _handleData(T inputEvent, _EventSink<T> sink) {
     bool satisfies;
     try {
       satisfies = _test(inputEvent);
     } catch (e, s) {
       _addErrorWithReplacement(sink, e, s);
       // The test didn't say true. Didn't say false either, but we stop anyway.
       sink._close();
       return;
     }
     if (satisfies) {
       sink._add(inputEvent);
     } else {
       sink._close();
     }
   }
 }
 
 class _SkipStream<T> extends _ForwardingStream<T, T> {
   final int _count;
 
   _SkipStream(Stream<T> source, int count)
-      : this._count = count, super(source) {
+      : this._count = count,
+        super(source) {
     // This test is done early to avoid handling an async error
     // in the _handleData method.
     if (count is! int || count < 0) throw new ArgumentError(count);
   }
 
-  StreamSubscription<T> _createSubscription(
-      void onData(T data),
-      Function onError,
-      void onDone(),
-      bool cancelOnError) {
+  StreamSubscription<T> _createSubscription(void onData(T data),
+      Function onError, void onDone(), bool cancelOnError) {
     return new _StateStreamSubscription<T>(
         this, onData, onError, onDone, cancelOnError, _count);
   }
 
   void _handleData(T inputEvent, _EventSink<T> sink) {
     _StateStreamSubscription<T> subscription = sink;
     int count = subscription._count;
     if (count > 0) {
       subscription._count = count - 1;
       return;
     }
     sink._add(inputEvent);
   }
 }
 
 class _SkipWhileStream<T> extends _ForwardingStream<T, T> {
   final _Predicate<T> _test;
 
   _SkipWhileStream(Stream<T> source, bool test(T value))
-      : this._test = test, super(source);
+      : this._test = test,
+        super(source);
 
-  StreamSubscription<T> _createSubscription(
-      void onData(T data),
-      Function onError,
-      void onDone(),
-      bool cancelOnError) {
+  StreamSubscription<T> _createSubscription(void onData(T data),
+      Function onError, void onDone(), bool cancelOnError) {
     return new _StateStreamSubscription<T>(
         this, onData, onError, onDone, cancelOnError, false);
   }
 
   void _handleData(T inputEvent, _EventSink<T> sink) {
     _StateStreamSubscription<T> subscription = sink;
     bool hasFailed = subscription._flag;
     if (hasFailed) {
       sink._add(inputEvent);
       return;
@@ skipping 16 matching lines @@
 
 typedef bool _Equality<T>(T a, T b);
 
 class _DistinctStream<T> extends _ForwardingStream<T, T> {
   static var _SENTINEL = new Object();
 
   _Equality<T> _equals;
   var _previous = _SENTINEL;
 
   _DistinctStream(Stream<T> source, bool equals(T a, T b))
-      : _equals = equals, super(source);
+      : _equals = equals,
+        super(source);
 
   void _handleData(T inputEvent, _EventSink<T> sink) {
     if (identical(_previous, _SENTINEL)) {
       _previous = inputEvent;
       return sink._add(inputEvent);
     } else {
       bool isEqual;
       try {
         if (_equals == null) {
           isEqual = (_previous == inputEvent);
         } else {
-          isEqual = _equals(_previous as Object /*=T*/, inputEvent);
+          isEqual = _equals(_previous as Object/*=T*/, inputEvent);
         }
       } catch (e, s) {
         _addErrorWithReplacement(sink, e, s);
         return null;
       }
       if (!isEqual) {
         sink._add(inputEvent);
         _previous = inputEvent;
       }
     }
   }
 }