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