Wrap constructor calls in an exception handler

sdk/lib/js/dartium/js_dartium.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.
 
 /**
  * Support for interoperating with JavaScript.
- * 
+ *
  * This library provides access to JavaScript objects from Dart, allowing
  * Dart code to get and set properties, and call methods of JavaScript objects
  * and invoke JavaScript functions. The library takes care of converting
  * between Dart and JavaScript objects where possible, or providing proxies if
  * conversion isn't possible.
  *
  * This library does not yet make Dart objects usable from JavaScript, their
  * methods and proeprties are not accessible, though it does allow Dart
  * functions to be passed into and called from JavaScript.
  *
  * [JsObject] is the core type and represents a proxy of a JavaScript object.
  * JsObject gives access to the underlying JavaScript objects properties and
  * methods. `JsObject`s can be acquired by calls to JavaScript, or they can be
  * created from proxies to JavaScript constructors.
  *
  * The top-level getter [context] provides a [JsObject] that represents the
  * global object in JavaScript, usually `window`.
  *
  * The following example shows an alert dialog via a JavaScript call to the
  * global function `alert()`:
  *
  *     import 'dart:js';
- *     
+ *
  *     main() => context.callMethod('alert', ['Hello from Dart!']);
  *
  * This example shows how to create a [JsObject] from a JavaScript constructor
  * and access its properties:
  *
  *     import 'dart:js';
- *     
+ *
  *     main() {
  *       var object = new JsObject(context['Object']);
  *       object['greeting'] = 'Hello';
  *       object['greet'] = (name) => "${object['greeting']} $name";
  *       var message = object.callMethod('greet', ['JavaScript']);
  *       context['console'].callMethod('log', [message]);
  *     }
  *
  * ## Proxying and automatic conversion
- * 
+ *
  * When setting properties on a JsObject or passing arguments to a Javascript
  * method or function, Dart objects are automatically converted or proxied to
  * JavaScript objects. When accessing JavaScript properties, or when a Dart
  * closure is invoked from JavaScript, the JavaScript objects are also
  * converted to Dart.
  *
  * Functions and closures are proxied in such a way that they are callable. A
  * Dart closure assigned to a JavaScript property is proxied by a function in
  * JavaScript. A JavaScript function accessed from Dart is proxied by a
  * [JsFunction], which has a [apply] method to invoke it.
@@ skipping 15 matching lines @@
  * ## Converting collections with JsObject.jsify()
  *
  * To create a JavaScript collection from a Dart collection use the
  * [JsObject.jsify] constructor, which converts Dart [Map]s and [Iterable]s
  * into JavaScript Objects and Arrays.
  *
  * The following expression creats a new JavaScript object with the properties
  * `a` and `b` defined:
  *
  *     var jsMap = new JsObject.jsify({'a': 1, 'b': 2});
- * 
+ *
  * This expression creates a JavaScript array:
  *
  *     var jsArray = new JsObject.jsify([1, 2, 3]);
  */
 library dart.js;
 
 import 'dart:collection' show ListMixin;
 import 'dart:nativewrappers';
 import 'dart:math' as math;
 import 'dart:mirrors' as mirrors;
@@ skipping 391 matching lines @@
  * The properties of the JavaScript object are accessible via the `[]` and
  * `[]=` operators. Methods are callable via [callMethod].
  */
 class JsObject extends NativeFieldWrapperClass2 {
   JsObject.internal();
 
   /**
    * Constructs a new JavaScript object from [constructor] and returns a proxy
    * to it.
    */
-  factory JsObject(JsFunction constructor, [List arguments]) =>
-      _create(constructor, arguments);
+  factory JsObject(JsFunction constructor, [List arguments]) {
+    try {
+      return _create(constructor, arguments);
+    } catch (e) {
+      // Re-throw any errors (returned as a string) as a DomException.
+      throw new html.DomException.jsInterop(e);
+    }
+  }
 
   static JsObject _create(
       JsFunction constructor, arguments) native "JsObject_constructorCallback";
 
   _buildArgs(Invocation invocation) {
     if (invocation.namedArguments.isEmpty) {
       return invocation.positionalArguments;
     } else {
       var varArgs = new Map<String, Object>();
       invocation.namedArguments.forEach((symbol, val) {
         varArgs[mirrors.MirrorSystem.getName(symbol)] = val;
       });
       return invocation.positionalArguments.toList()
         ..add(new JsObject.jsify(varArgs));
     }
   }
 
   /**
    * Constructs a [JsObject] that proxies a native Dart object; _for expert use
    * only_.
    *
    * Use this constructor only if you wish to get access to JavaScript
    * properties attached to a browser host object, such as a Node or Blob, that
    * is normally automatically converted into a native Dart object.
-   * 
+   *
    * An exception will be thrown if [object] either is `null` or has the type
    * `bool`, `num`, or `String`.
    */
   factory JsObject.fromBrowserObject(object) {
     if (object is num || object is String || object is bool || object == null) {
       throw new ArgumentError("object cannot be a num, string, bool, or null");
     }
     return _fromBrowserObject(object);
   }
 
@@ skipping 29 matching lines @@
   /**
    * Sets the value associated with [property] on the proxied JavaScript
    * object.
    *
    * The type of [property] must be either [String] or [num].
    */
   operator []=(property, value) {
     try {
       _operator_setter(property, value);
     } catch (e) {
-      // Re-throw any errors (returned as a string) as a DomExcetion. 
+      // Re-throw any errors (returned as a string) as a DomException.
       throw new html.DomException.jsInterop(e);
     }
   }
   _operator_setter(property, value) native "JsObject_[]=";
 
   int get hashCode native "JsObject_hashCode";
 
   operator ==(other) {
     var is_JsObject = other is JsObject;
     if (!is_JsObject) {
@@ skipping 268 matching lines @@
 
 /**
  * Returns a method that can be called with an arbitrary number (for n less
  * than 11) of arguments without violating Dart type checks.
  */
 Function _wrapAsDebuggerVarArgsFunction(JsFunction jsFunction) =>
     ([a1 = _UNDEFINED, a2 = _UNDEFINED, a3 = _UNDEFINED, a4 = _UNDEFINED,
         a5 = _UNDEFINED, a6 = _UNDEFINED, a7 = _UNDEFINED, a8 = _UNDEFINED,
         a9 = _UNDEFINED, a10 = _UNDEFINED]) => jsFunction._applyDebuggerOnly(
             _stripUndefinedArgs([a1, a2, a3, a4, a5, a6, a7, a8, a9, a10]));