Move helpers and interceptors to own library.

dart/frog/leg/lib/js_helper.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
-void print(var obj) {
-  obj = obj.toString();
-  var hasConsole = JS("bool", @"typeof console == 'object'");
-  if (hasConsole) {
-    JS("void", @"console.log($0)", obj);
-  } else {
-    JS("void", @"write($0)", obj);
-    JS("void", @"write('\n')");
-  }
-}
+#library('js_helper');
+
+#import('core.dart');
 
 $throw(String msg) {
   var e = JS("Object", @"new Error($0)", msg);
   var hasTrace = JS("bool", @"Error.captureStackTrace !== (void 0)");
   if (hasTrace) {
     JS("void", @"Error.captureStackTrace($0)", e);
   }
   throw e;
 }
 
@@ skipping 274 matching lines @@
   if (JS("bool", @"typeof $0 === 'string'", receiver) || isJSArray(receiver)) {
     return JS("bool", @"$0.length === 0", receiver);
   }
   return UNINTERCEPTED(receiver.isEmpty());
 }
 
 
 bool isInt(var v) {
   return JS("bool", @"($0 | 0) === $1", v, v);
 }
-
-/* Include when interfaces are implemented
-interface Iterable<T> {
-  Iterator<T> iterator();
-}
-
-interface Iterator<T> {
-  bool hasNext();
-  T next();
-}
-*/
-class int {}
-class double {}
-class String {}
-class bool {}
-class Object {
-  String toString() {
-    String name = JS('String', @'this.constructor.name');
-    if (name === null) {
-      name = JS('String', @'$0.match(/^\s*function\s*(\S*)\s*\(/)[1]',
-                JS('String', @'this.constructor.toString()'));
-    }
-    return "Instance of '$name'";
-  }
-
-  void noSuchMethod(String name, List args) {
-    throw new NoSuchMethodException(this, name, args);
-  }
-}
-
-class NoSuchMethodException {
-  Object receiver;
-  String name;
-  List args;
-  NoSuchMethodException(Object this.receiver, String this.name, List this.args);
-  String toString() {
-    return "NoSuchMethodException - receiver: '$receiver'" +
-        "function name: '$name' arguments: [$args]";
-  }
-}
-
-class List<T> /* implements Iterable<T> */ {
-
-  factory List([int length]) {
-    if (length == null) return JS("Object", @"new Array()");
-    if (!isInt(length)) throw "Invalid argument";
-    if (length < 0) throw "Negative size";
-    return JS("Object", @"new Array($0)", length);
-  }
-}
-
-class ListIterator<T> /* implements Iterator<T> */ {
-  int i;
-  List<T> list;
-  ListIterator(List<T> this.list) : i = 0;
-  bool hasNext() => i < JS("int", @"$0.length", list);
-  T next() {
-    var value = JS("Object", @"$0[$1]", list, i);
-    i += 1;
-    return value;
-  }
-}
-
-class Expect {
-  // TODO(ngeoffray): add optional message parameters to these
-  // methods.
-  static void equals(var expected, var actual) {
-    if (expected == actual) return;
-    _fail('Expect.equals(expected: <$expected>, actual:<$actual> fails.');
-  }
-
-  static void fail(String message) {
-    _fail("Expect.fail('$message')");
-  }
-
-  static void _fail(String message) {
-    $throw(message);
-  }
-
-  static void isTrue(var actual) {
-    if (actual === true) return;
-    _fail("Expect.isTrue($actual) fails.");
-  }
-
-  static void isFalse(var actual) {
-    if (actual === false) return;
-    _fail("Expect.isFalse($actual) fails.");
-  }
-
-  static void listEquals(List expected, List actual) {
-    // We check on length at the end in order to provide better error
-    // messages when an unexpected item is inserted in a list.
-    if (expected.length != actual.length) {
-      _fail('list not equals');
-    }
-
-    for (int i = 0; i < expected.length; i++) {
-      if (expected[i] != actual[i]) {
-        _fail('list not equals');
-      }
-    }
-  }
-}
-
-class Stopwatch {
-  double startMs;
-  double elapsedMs;
-
-  Stopwatch() {
-    elapsedMs = 0.0;
-  }
-
-  void start() {
-    if (startMs == null) {
-      startMs = JS("num", @"Date.now()");
-    }
-  }
-
-  void stop() {
-    if (startMs == null) return;
-    elapsedMs += JS("num", @"Date.now() - $0", startMs);
-    startMs = null;
-  }
-
-  void reset() {
-    elapsedMs = 0.0;
-    if (startMs == null) return;
-    startMs = JS("num", @"Date.now()");
-  }
-
-  int elapsed() {
-    return elapsedInMs();
-  }
-
-  int elapsedInUs() {
-    return elapsedInMs() * 1000;
-  }
-
-  int elapsedInMs() {
-    if (startMs == null) {
-      return JS("num", @"Math.floor($0)", elapsedMs);
-    } else {
-      return
-        JS("num", @"Math.floor($0 + (Date.now() - $1))", elapsedMs, startMs);
-    }
-  }
-
-  int frequency() {
-    return 1000;
-  }
-}