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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
      3  * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org>
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef JSCallbackObject_h
     28 #define JSCallbackObject_h
     29 
     30 #include "JSObjectRef.h"
     31 #include "JSValueRef.h"
     32 #include "JSObject.h"
     33 
     34 namespace JSC {
     35 
     36 template <class Base>
     37 class JSCallbackObject : public Base {
     38 public:
     39     JSCallbackObject(ExecState*, NonNullPassRefPtr<Structure>, JSClassRef, void* data);
     40     JSCallbackObject(JSClassRef);
     41     virtual ~JSCallbackObject();
     42 
     43     void setPrivate(void* data);
     44     void* getPrivate();
     45 
     46     static const ClassInfo info;
     47 
     48     JSClassRef classRef() const { return m_callbackObjectData->jsClass; }
     49     bool inherits(JSClassRef) const;
     50 
     51     static PassRefPtr<Structure> createStructure(JSValue proto)
     52     {
     53         return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), Base::AnonymousSlotCount);
     54     }
     55 
     56 protected:
     57     static const unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | Base::StructureFlags;
     58 
     59 private:
     60     virtual UString className() const;
     61 
     62     virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
     63     virtual bool getOwnPropertySlot(ExecState*, unsigned, PropertySlot&);
     64     virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
     65 
     66     virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
     67 
     68     virtual bool deleteProperty(ExecState*, const Identifier&);
     69     virtual bool deleteProperty(ExecState*, unsigned);
     70 
     71     virtual bool hasInstance(ExecState* exec, JSValue value, JSValue proto);
     72 
     73     virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
     74 
     75     virtual double toNumber(ExecState*) const;
     76     virtual UString toString(ExecState*) const;
     77 
     78     virtual ConstructType getConstructData(ConstructData&);
     79     virtual CallType getCallData(CallData&);
     80     virtual const ClassInfo* classInfo() const { return &info; }
     81 
     82     void init(ExecState*);
     83 
     84     static JSCallbackObject* asCallbackObject(JSValue);
     85 
     86     static JSValue JSC_HOST_CALL call(ExecState*, JSObject* functionObject, JSValue thisValue, const ArgList&);
     87     static JSObject* construct(ExecState*, JSObject* constructor, const ArgList&);
     88 
     89     static JSValue staticValueGetter(ExecState*, const Identifier&, const PropertySlot&);
     90     static JSValue staticFunctionGetter(ExecState*, const Identifier&, const PropertySlot&);
     91     static JSValue callbackGetter(ExecState*, const Identifier&, const PropertySlot&);
     92 
     93     struct JSCallbackObjectData {
     94         JSCallbackObjectData(void* privateData, JSClassRef jsClass)
     95             : privateData(privateData)
     96             , jsClass(jsClass)
     97         {
     98             JSClassRetain(jsClass);
     99         }
    100 
    101         ~JSCallbackObjectData()
    102         {
    103             JSClassRelease(jsClass);
    104         }
    105 
    106         void* privateData;
    107         JSClassRef jsClass;
    108     };
    109 
    110     OwnPtr<JSCallbackObjectData> m_callbackObjectData;
    111 };
    112 
    113 } // namespace JSC
    114 
    115 // include the actual template class implementation
    116 #include "JSCallbackObjectFunctions.h"
    117 
    118 #endif // JSCallbackObject_h
    119