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::s_info = { "CallbackConstructor", &JSObjectWithGlobalObject::s_info, 0, 0 }; 40 41 JSCallbackConstructor::JSCallbackConstructor(JSGlobalObject* globalObject, Structure* structure, JSClassRef jsClass, JSObjectCallAsConstructorCallback callback) 42 : JSObjectWithGlobalObject(globalObject, structure) 43 , m_class(jsClass) 44 , m_callback(callback) 45 { 46 ASSERT(inherits(&s_info)); 47 if (m_class) 48 JSClassRetain(jsClass); 49 } 50 51 JSCallbackConstructor::~JSCallbackConstructor() 52 { 53 if (m_class) 54 JSClassRelease(m_class); 55 } 56 57 static EncodedJSValue JSC_HOST_CALL constructJSCallback(ExecState* exec) 58 { 59 JSObject* constructor = exec->callee(); 60 JSContextRef ctx = toRef(exec); 61 JSObjectRef constructorRef = toRef(constructor); 62 63 JSObjectCallAsConstructorCallback callback = static_cast<JSCallbackConstructor*>(constructor)->callback(); 64 if (callback) { 65 int argumentCount = static_cast<int>(exec->argumentCount()); 66 Vector<JSValueRef, 16> arguments(argumentCount); 67 for (int i = 0; i < argumentCount; i++) 68 arguments[i] = toRef(exec, exec->argument(i)); 69 70 JSValueRef exception = 0; 71 JSObjectRef result; 72 { 73 APICallbackShim callbackShim(exec); 74 result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception); 75 } 76 if (exception) 77 throwError(exec, toJS(exec, exception)); 78 return JSValue::encode(toJS(result)); 79 } 80 81 return JSValue::encode(toJS(JSObjectMake(ctx, static_cast<JSCallbackConstructor*>(constructor)->classRef(), 0))); 82 } 83 84 ConstructType JSCallbackConstructor::getConstructData(ConstructData& constructData) 85 { 86 constructData.native.function = constructJSCallback; 87 return ConstructTypeHost; 88 } 89 90 } // namespace JSC 91