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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "JSCallbackConstructor.h"
     28 
     29 #include "APIShims.h"
     30 #include "APICast.h"
     31 #include <runtime/JSGlobalObject.h>
     32 #include <runtime/JSLock.h>
     33 #include <runtime/ObjectPrototype.h>
     34 #include <wtf/Vector.h>
     35 
     36 namespace JSC {
     37 
     38 const ClassInfo JSCallbackConstructor::info = { "CallbackConstructor", 0, 0, 0 };
     39 
     40 JSCallbackConstructor::JSCallbackConstructor(NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, JSObjectCallAsConstructorCallback callback)
     41     : JSObject(structure)
     42     , m_class(jsClass)
     43     , m_callback(callback)
     44 {
     45     if (m_class)
     46         JSClassRetain(jsClass);
     47 }
     48 
     49 JSCallbackConstructor::~JSCallbackConstructor()
     50 {
     51     if (m_class)
     52         JSClassRelease(m_class);
     53 }
     54 
     55 static JSObject* constructJSCallback(ExecState* exec, JSObject* constructor, const ArgList& args)
     56 {
     57     JSContextRef ctx = toRef(exec);
     58     JSObjectRef constructorRef = toRef(constructor);
     59 
     60     JSObjectCallAsConstructorCallback callback = static_cast<JSCallbackConstructor*>(constructor)->callback();
     61     if (callback) {
     62         int argumentCount = static_cast<int>(args.size());
     63         Vector<JSValueRef, 16> arguments(argumentCount);
     64         for (int i = 0; i < argumentCount; i++)
     65             arguments[i] = toRef(exec, args.at(i));
     66 
     67         JSValueRef exception = 0;
     68         JSObjectRef result;
     69         {
     70             APICallbackShim callbackShim(exec);
     71             result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception);
     72         }
     73         if (exception)
     74             exec->setException(toJS(exec, exception));
     75         return toJS(result);
     76     }
     77 
     78     return toJS(JSObjectMake(ctx, static_cast<JSCallbackConstructor*>(constructor)->classRef(), 0));
     79 }
     80 
     81 ConstructType JSCallbackConstructor::getConstructData(ConstructData& constructData)
     82 {
     83     constructData.native.function = constructJSCallback;
     84     return ConstructTypeHost;
     85 }
     86 
     87 } // namespace JSC
     88