1/*
2 * Copyright (C) 2011 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 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 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#ifndef JSProxy_h
27#define JSProxy_h
28
29#include "JSDestructibleObject.h"
30
31namespace JSC {
32
33class JSProxy : public JSDestructibleObject {
34public:
35    typedef JSDestructibleObject Base;
36
37    static JSProxy* create(VM& vm, Structure* structure, JSObject* target)
38    {
39        JSProxy* proxy = new (NotNull, allocateCell<JSProxy>(vm.heap)) JSProxy(vm, structure);
40        proxy->finishCreation(vm, target);
41        return proxy;
42    }
43
44    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype, JSType proxyType = ImpureProxyType)
45    {
46        return Structure::create(vm, globalObject, prototype, TypeInfo(proxyType, StructureFlags), info());
47    }
48
49    DECLARE_EXPORT_INFO;
50
51    JSObject* target() const { return m_target.get(); }
52    static ptrdiff_t targetOffset() { return OBJECT_OFFSETOF(JSProxy, m_target); }
53
54protected:
55    JSProxy(VM& vm, Structure* structure)
56        : JSDestructibleObject(vm, structure)
57    {
58    }
59
60    void finishCreation(VM& vm)
61    {
62        Base::finishCreation(vm);
63    }
64
65    void finishCreation(VM& vm, JSObject* target)
66    {
67        Base::finishCreation(vm);
68        m_target.set(vm, this, target);
69    }
70
71    static const unsigned StructureFlags = OverridesVisitChildren | OverridesGetOwnPropertySlot | OverridesGetPropertyNames | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | Base::StructureFlags;
72
73    JS_EXPORT_PRIVATE static void visitChildren(JSCell*, SlotVisitor&);
74
75    JS_EXPORT_PRIVATE void setTarget(VM&, JSGlobalObject*);
76
77    JS_EXPORT_PRIVATE static String className(const JSObject*);
78    JS_EXPORT_PRIVATE static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
79    JS_EXPORT_PRIVATE static bool getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned, PropertySlot&);
80    JS_EXPORT_PRIVATE static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
81    JS_EXPORT_PRIVATE static void putByIndex(JSCell*, ExecState*, unsigned, JSValue, bool shouldThrow);
82    JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, ExecState*, PropertyName);
83    JS_EXPORT_PRIVATE static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned);
84    JS_EXPORT_PRIVATE static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
85    JS_EXPORT_PRIVATE static void getPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
86    JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
87
88private:
89    WriteBarrier<JSObject> m_target;
90};
91
92} // namespace JSC
93
94#endif // JSProxy_h
95