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 static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetPropertyNames | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero;
37
38 static JSProxy* create(VM& vm, Structure* structure, JSObject* target)
39 {
40 JSProxy* proxy = new (NotNull, allocateCell<JSProxy>(vm.heap)) JSProxy(vm, structure);
41 proxy->finishCreation(vm, target);
42 return proxy;
43 }
44
45 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype, JSType proxyType = ImpureProxyType)
46 {
47 return Structure::create(vm, globalObject, prototype, TypeInfo(proxyType, StructureFlags), info());
48 }
49
50 DECLARE_EXPORT_INFO;
51
52 JSObject* target() const { return m_target.get(); }
53 static ptrdiff_t targetOffset() { return OBJECT_OFFSETOF(JSProxy, m_target); }
54
55protected:
56 JSProxy(VM& vm, Structure* structure)
57 : JSDestructibleObject(vm, structure)
58 {
59 }
60
61 void finishCreation(VM& vm)
62 {
63 Base::finishCreation(vm);
64 }
65
66 void finishCreation(VM& vm, JSObject* target)
67 {
68 Base::finishCreation(vm);
69 m_target.set(vm, this, target);
70 }
71
72 JS_EXPORT_PRIVATE static void visitChildren(JSCell*, SlotVisitor&);
73
74 JS_EXPORT_PRIVATE void setTarget(VM&, JSGlobalObject*);
75
76 JS_EXPORT_PRIVATE static String className(const JSObject*);
77 JS_EXPORT_PRIVATE static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
78 JS_EXPORT_PRIVATE static bool getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned, PropertySlot&);
79 JS_EXPORT_PRIVATE static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
80 JS_EXPORT_PRIVATE static void putByIndex(JSCell*, ExecState*, unsigned, JSValue, bool shouldThrow);
81 JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, ExecState*, PropertyName);
82 JS_EXPORT_PRIVATE static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned);
83 JS_EXPORT_PRIVATE static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
84 JS_EXPORT_PRIVATE static void getPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
85 JS_EXPORT_PRIVATE static uint32_t getEnumerableLength(ExecState*, JSObject*);
86 JS_EXPORT_PRIVATE static void getStructurePropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
87 JS_EXPORT_PRIVATE static void getGenericPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
88 JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
89
90private:
91 WriteBarrier<JSObject> m_target;
92};
93
94} // namespace JSC
95
96#endif // JSProxy_h
97