Support user generated custom native JS classes.

pkg/compiler/lib/src/js_backend/backend.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 js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
@@ skipping 271 matching lines @@
   ClassElement jsInterceptorClass;
   ClassElement jsStringClass;
   ClassElement jsArrayClass;
   ClassElement jsNumberClass;
   ClassElement jsIntClass;
   ClassElement jsDoubleClass;
   ClassElement jsNullClass;
   ClassElement jsBoolClass;
   ClassElement jsPlainJavaScriptObjectClass;
   ClassElement jsUnknownJavaScriptObjectClass;
+  ClassElement jsJavaScriptFunctionClass;
 
   ClassElement jsIndexableClass;
   ClassElement jsMutableIndexableClass;
 
   ClassElement jsMutableArrayClass;
   ClassElement jsFixedArrayClass;
   ClassElement jsExtendableArrayClass;
   ClassElement jsUnmodifiableArrayClass;
   ClassElement jsPositiveIntClass;
   ClassElement jsUInt32Class;
@@ skipping 730 matching lines @@
         // For map literals, the dependency between the implementation class
         // and [Map] is not visible, so we have to add it manually.
         rti.registerRtiDependency(mapLiteralClass, cls);
       } else if (cls == boundClosureClass) {
         // TODO(johnniwinther): Is this a noop?
         enqueueClass(enqueuer, boundClosureClass, registry);
       } else if (Elements.isNativeOrExtendsNative(cls)) {
         enqueue(enqueuer, getNativeInterceptorMethod, registry);
         enqueueClass(enqueuer, jsInterceptorClass, compiler.globalDependencies);
         enqueueClass(enqueuer, jsPlainJavaScriptObjectClass, registry);
+        enqueueClass(enqueuer, jsJavaScriptFunctionClass, registry);
       } else if (cls == mapLiteralClass) {
         // For map literals, the dependency between the implementation class
         // and [Map] is not visible, so we have to add it manually.
         Element getFactory(String name, int arity) {
           // The constructor is on the patch class, but dart2js unit tests don't
           // have a patch class.
           ClassElement implementation = cls.patch != null ? cls.patch : cls;
           ConstructorElement ctor = implementation.lookupConstructor(name);
           if (ctor == null
               || (Name.isPrivateName(name)
@@ skipping 60 matching lines @@
       addInterceptors(jsIntClass, enqueuer, registry);
       addInterceptors(jsPositiveIntClass, enqueuer, registry);
       addInterceptors(jsUInt32Class, enqueuer, registry);
       addInterceptors(jsUInt31Class, enqueuer, registry);
       addInterceptors(jsDoubleClass, enqueuer, registry);
       addInterceptors(jsNumberClass, enqueuer, registry);
     } else if (cls == jsPlainJavaScriptObjectClass) {
       addInterceptors(jsPlainJavaScriptObjectClass, enqueuer, registry);
     } else if (cls == jsUnknownJavaScriptObjectClass) {
       addInterceptors(jsUnknownJavaScriptObjectClass, enqueuer, registry);
+    } else if (cls == jsJavaScriptFunctionClass) {
+      addInterceptors(jsJavaScriptFunctionClass, enqueuer, registry);
     } else if (Elements.isNativeOrExtendsNative(cls)) {
       addInterceptorsForNativeClassMembers(cls, enqueuer);
     } else if (cls == jsIndexingBehaviorInterface) {
       // These two helpers are used by the emitter and the codegen.
       // Because we cannot enqueue elements at the time of emission,
       // we make sure they are always generated.
       enqueue(enqueuer, findHelper('isJsIndexable'), registry);
     }
 
     customElementsAnalysis.registerInstantiatedClass(cls, enqueuer);
   }
 
   void registerUseInterceptor(Enqueuer enqueuer) {
     assert(!enqueuer.isResolutionQueue);
     if (!enqueuer.nativeEnqueuer.hasInstantiatedNativeClasses()) return;
     Registry registry = compiler.globalDependencies;
     enqueue(enqueuer, getNativeInterceptorMethod, registry);
     enqueueClass(enqueuer, jsPlainJavaScriptObjectClass, registry);
+    enqueueClass(enqueuer, jsJavaScriptFunctionClass, registry);
     needToInitializeIsolateAffinityTag = true;
     needToInitializeDispatchProperty = true;
   }
 
   JavaScriptItemCompilationContext createItemCompilationContext() {
     return new JavaScriptItemCompilationContext();
   }
 
   void enqueueHelpers(ResolutionEnqueuer world, Registry registry) {
     assert(interceptorsLibrary != null);
@@ skipping 115 matching lines @@
       }
       // We also need the native variant of the check (for DOM types).
       helper = getNativeCheckedModeHelper(type, typeCast: false);
       if (helper != null) {
         enqueue(world, helper.getElement(compiler), registry);
       }
     }
     if (!type.treatAsRaw || type.containsTypeVariables) {
       enqueueClass(world, compiler.listClass, registry);
     }
-    if (type.element != null && type.element.isNative) {
+    if (type.element != null && (type.element.isNative || type.element.isJsInterop)) {
       // We will neeed to add the "$is" and "$as" properties on the
       // JavaScript object prototype, so we make sure
       // [:defineProperty:] is compiled.
       enqueue(world, findHelper('defineProperty'), registry);
     }
   }
 
   void registerTypeVariableBoundsSubtypeCheck(DartType typeArgument,
                                               DartType bound) {
     rti.registerTypeVariableBoundsSubtypeCheck(typeArgument, bound);
@@ skipping 175 matching lines @@
   native.NativeEnqueuer nativeResolutionEnqueuer(Enqueuer world) {
     return new native.NativeResolutionEnqueuer(world, compiler);
   }
 
   native.NativeEnqueuer nativeCodegenEnqueuer(Enqueuer world) {
     return new native.NativeCodegenEnqueuer(world, compiler, emitter);
   }
 
   ClassElement defaultSuperclass(ClassElement element) {
     // Native classes inherit from Interceptor.
-    return element.isNative ? jsInterceptorClass : compiler.objectClass;
+    return (element.isNative || element.isJsInterop) ? jsInterceptorClass : compiler.objectClass;
   }
 
   /**
    * Unit test hook that returns code of an element as a String.
    *
    * Invariant: [element] must be a declaration element.
    */
   String assembleCode(Element element) {
     assert(invariant(element, element.isDeclaration));
     var code = generatedCode[element];
@@ skipping 610 matching lines @@
         jsUInt31Class = findClass('JSUInt31');
         jsDoubleClass = findClass('JSDouble');
         jsNumberClass = findClass('JSNumber');
         jsNullClass = findClass('JSNull');
         jsBoolClass = findClass('JSBool');
         jsMutableArrayClass = findClass('JSMutableArray');
         jsFixedArrayClass = findClass('JSFixedArray');
         jsExtendableArrayClass = findClass('JSExtendableArray');
         jsUnmodifiableArrayClass = findClass('JSUnmodifiableArray');
         jsPlainJavaScriptObjectClass = findClass('PlainJavaScriptObject');
+        jsJavaScriptFunctionClass = findClass('JavaScriptFunction');
         jsUnknownJavaScriptObjectClass = findClass('UnknownJavaScriptObject');
         jsIndexableClass = findClass('JSIndexable');
         jsMutableIndexableClass = findClass('JSMutableIndexable');
       } else if (uri == DART_JS_HELPER) {
         initializeHelperClasses();
         assertMethod = findHelper('assertHelper');
 
         typeLiteralClass = findClass('TypeImpl');
         constMapLiteralClass = findClass('ConstantMap');
         typeVariableClass = findClass('TypeVariable');
@@ skipping 883 matching lines @@
               backend.getAssertSubtypeOfRuntimeType(), registry);
         }
       }
       registerBackendInstantiation(backend.compiler.listClass, registry);
     }
     if (type is FunctionType) {
       registerBackendStaticInvocation(
           backend.find(backend.jsHelperLibrary, 'functionTypeTestMetaHelper'),
           registry);
     }
-    if (type.element != null && type.element.isNative) {
+    if (type.element != null && (type.element.isNative || type.element.isJsInterop)) {
       // We will neeed to add the "$is" and "$as" properties on the
       // JavaScript object prototype, so we make sure
       // [:defineProperty:] is compiled.
       registerBackendStaticInvocation(
           backend.find(backend.jsHelperLibrary, 'defineProperty'), registry);
     }
   }
 
   void onTypeVariableBoundCheck(Registry registry) {
     assert(registry.isForResolution);
@@ skipping 82 matching lines @@
   }
 }
 
 /// Records that [constant] is used by the element behind [registry].
 class Dependency {
   final ConstantValue constant;
   final Element annotatedElement;
 
   const Dependency(this.constant, this.annotatedElement);
 }