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/Error.h>

    32 #include <runtime/JSGlobalObject.h>

    33 #include <runtime/JSLock.h>

    34 #include <runtime/ObjectPrototype.h>

    35 #include <wtf/Vector.h>

    36 

    37 namespace JSC {

    38 

    39 const ClassInfo JSCallbackConstructor::info = { "CallbackConstructor", 0, 0, 0 };

    40 

    41 JSCallbackConstructor::JSCallbackConstructor(JSGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, JSObjectCallAsConstructorCallback callback)

    42     : JSObjectWithGlobalObject(globalObject, structure)

    43     , m_class(jsClass)

    44     , m_callback(callback)

    45 {

    46     if (m_class)

    47         JSClassRetain(jsClass);

    48 }

    49 

    50 JSCallbackConstructor::~JSCallbackConstructor()

    51 {

    52     if (m_class)

    53         JSClassRelease(m_class);

    54 }

    55 

    56 static EncodedJSValue JSC_HOST_CALL constructJSCallback(ExecState* exec)

    57 {

    58     JSObject* constructor = exec->callee();

    59     JSContextRef ctx = toRef(exec);

    60     JSObjectRef constructorRef = toRef(constructor);

    61 

    62     JSObjectCallAsConstructorCallback callback = static_cast<JSCallbackConstructor*>(constructor)->callback();

    63     if (callback) {

    64         int argumentCount = static_cast<int>(exec->argumentCount());

    65         Vector<JSValueRef, 16> arguments(argumentCount);

    66         for (int i = 0; i < argumentCount; i++)

    67             arguments[i] = toRef(exec, exec->argument(i));

    68 

    69         JSValueRef exception = 0;

    70         JSObjectRef result;

    71         {

    72             APICallbackShim callbackShim(exec);

    73             result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception);

    74         }

    75         if (exception)

    76             throwError(exec, toJS(exec, exception));

    77         return JSValue::encode(toJS(result));

    78     }

    79     

    80     return JSValue::encode(toJS(JSObjectMake(ctx, static_cast<JSCallbackConstructor*>(constructor)->classRef(), 0)));

    81 }

    82 

    83 ConstructType JSCallbackConstructor::getConstructData(ConstructData& constructData)

    84 {

    85     constructData.native.function = constructJSCallback;

    86     return ConstructTypeHost;

    87 }

    88 

    89 } // namespace JSC