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 "Error.h" 32#include "JSGlobalObject.h" 33#include "JSLock.h" 34#include "ObjectPrototype.h" 35#include "Operations.h" 36#include <wtf/Vector.h> 37 38namespace JSC { 39 40const ClassInfo JSCallbackConstructor::s_info = { "CallbackConstructor", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackConstructor) }; 41 42JSCallbackConstructor::JSCallbackConstructor(JSGlobalObject* globalObject, Structure* structure, JSClassRef jsClass, JSObjectCallAsConstructorCallback callback) 43 : JSDestructibleObject(globalObject->vm(), structure) 44 , m_class(jsClass) 45 , m_callback(callback) 46{ 47} 48 49void JSCallbackConstructor::finishCreation(JSGlobalObject* globalObject, JSClassRef jsClass) 50{ 51 Base::finishCreation(globalObject->vm()); 52 ASSERT(inherits(&s_info)); 53 if (m_class) 54 JSClassRetain(jsClass); 55} 56 57JSCallbackConstructor::~JSCallbackConstructor() 58{ 59 if (m_class) 60 JSClassRelease(m_class); 61} 62 63void JSCallbackConstructor::destroy(JSCell* cell) 64{ 65 static_cast<JSCallbackConstructor*>(cell)->JSCallbackConstructor::~JSCallbackConstructor(); 66} 67 68static EncodedJSValue JSC_HOST_CALL constructJSCallback(ExecState* exec) 69{ 70 JSObject* constructor = exec->callee(); 71 JSContextRef ctx = toRef(exec); 72 JSObjectRef constructorRef = toRef(constructor); 73 74 JSObjectCallAsConstructorCallback callback = jsCast<JSCallbackConstructor*>(constructor)->callback(); 75 if (callback) { 76 size_t argumentCount = exec->argumentCount(); 77 Vector<JSValueRef, 16> arguments; 78 arguments.reserveInitialCapacity(argumentCount); 79 for (size_t i = 0; i < argumentCount; ++i) 80 arguments.uncheckedAppend(toRef(exec, exec->argument(i))); 81 82 JSValueRef exception = 0; 83 JSObjectRef result; 84 { 85 APICallbackShim callbackShim(exec); 86 result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception); 87 } 88 if (exception) 89 throwError(exec, toJS(exec, exception)); 90 // result must be a valid JSValue. 91 if (!result) 92 return throwVMTypeError(exec); 93 return JSValue::encode(toJS(result)); 94 } 95 96 return JSValue::encode(toJS(JSObjectMake(ctx, jsCast<JSCallbackConstructor*>(constructor)->classRef(), 0))); 97} 98 99ConstructType JSCallbackConstructor::getConstructData(JSCell*, ConstructData& constructData) 100{ 101 constructData.native.function = constructJSCallback; 102 return ConstructTypeHost; 103} 104 105} // namespace JSC 106