runtime/JSProxy.h

   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
  31 namespace JSC {
  32
  33 class JSProxy : public JSDestructibleObject {
  34 public:
  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
  55 protected:
  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
  90 private:
  91     WriteBarrier<JSObject> m_target;
  92 };
  93
  94 } // namespace JSC
  95
  96 #endif // JSProxy_h