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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/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 
JSCallbackConstructor(JSGlobalObject * globalObject,Structure * structure,JSClassRef jsClass,JSObjectCallAsConstructorCallback callback)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 
~JSCallbackConstructor()51 JSCallbackConstructor::~JSCallbackConstructor()
52 {
53     if (m_class)
54         JSClassRelease(m_class);
55 }
56 
constructJSCallback(ExecState * exec)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 
getConstructData(ConstructData & constructData)84 ConstructType JSCallbackConstructor::getConstructData(ConstructData& constructData)
85 {
86     constructData.native.function = constructJSCallback;
87     return ConstructTypeHost;
88 }
89 
90 } // namespace JSC
91