/*

 * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.

 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef JSCallbackObject_h

#define JSCallbackObject_h

#include "JSObjectRef.h"

#include "JSValueRef.h"

#include "JSObject.h"

#include <wtf/PassOwnPtr.h>

namespace JSC {

struct JSCallbackObjectData {

    JSCallbackObjectData(void* privateData, JSClassRef jsClass)

        : privateData(privateData)

        , jsClass(jsClass)

    {

        JSClassRetain(jsClass);

    }

    ~JSCallbackObjectData()

    {

        JSClassRelease(jsClass);

    }

    JSValue getPrivateProperty(const Identifier& propertyName) const

    {

        if (!m_privateProperties)

            return JSValue();

        return m_privateProperties->getPrivateProperty(propertyName);

    }

    void setPrivateProperty(const Identifier& propertyName, JSValue value)

    {

        if (!m_privateProperties)

            m_privateProperties = adoptPtr(new JSPrivatePropertyMap);

        m_privateProperties->setPrivateProperty(propertyName, value);

    }

    void deletePrivateProperty(const Identifier& propertyName)

    {

        if (!m_privateProperties)

            return;

        m_privateProperties->deletePrivateProperty(propertyName);

    }

    void markChildren(MarkStack& markStack)

    {

        if (!m_privateProperties)

            return;

        m_privateProperties->markChildren(markStack);

    }

    void* privateData;

    JSClassRef jsClass;

    struct JSPrivatePropertyMap {

        JSValue getPrivateProperty(const Identifier& propertyName) const

        {

            PrivatePropertyMap::const_iterator location = m_propertyMap.find(propertyName.ustring().rep());

            if (location == m_propertyMap.end())

                return JSValue();

            return location->second;

        }

        void setPrivateProperty(const Identifier& propertyName, JSValue value)

        {

            m_propertyMap.set(propertyName.ustring().rep(), value);

        }

        void deletePrivateProperty(const Identifier& propertyName)

        {

            m_propertyMap.remove(propertyName.ustring().rep());

        }

        void markChildren(MarkStack& markStack)

        {

            for (PrivatePropertyMap::iterator ptr = m_propertyMap.begin(); ptr != m_propertyMap.end(); ++ptr) {

                if (ptr->second)

                    markStack.append(ptr->second);

            }

        }

    private:

        typedef HashMap<RefPtr<UString::Rep>, JSValue, IdentifierRepHash> PrivatePropertyMap;

        PrivatePropertyMap m_propertyMap;

    };

    OwnPtr<JSPrivatePropertyMap> m_privateProperties;

};

template <class Base>

class JSCallbackObject : public Base {

public:

    JSCallbackObject(ExecState*, JSGlobalObject*, NonNullPassRefPtr<Structure>, JSClassRef, void* data);

    JSCallbackObject(JSClassRef, NonNullPassRefPtr<Structure>);

    virtual ~JSCallbackObject();

    void setPrivate(void* data);

    void* getPrivate();

    static const ClassInfo info;

    JSClassRef classRef() const { return m_callbackObjectData->jsClass; }

    bool inherits(JSClassRef) const;

    static PassRefPtr<Structure> createStructure(JSValue proto) 

    { 

        return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), Base::AnonymousSlotCount); 

    }

    JSValue getPrivateProperty(const Identifier& propertyName) const

    {

        return m_callbackObjectData->getPrivateProperty(propertyName);

    }

    void setPrivateProperty(const Identifier& propertyName, JSValue value)

    {

        m_callbackObjectData->setPrivateProperty(propertyName, value);

    }

    void deletePrivateProperty(const Identifier& propertyName)

    {

        m_callbackObjectData->deletePrivateProperty(propertyName);

    }

protected:

    static const unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | Base::StructureFlags;

private:

    virtual UString className() const;

    virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);

    virtual bool getOwnPropertySlot(ExecState*, unsigned, PropertySlot&);

    virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);

    virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);

    virtual bool deleteProperty(ExecState*, const Identifier&);

    virtual bool deleteProperty(ExecState*, unsigned);

    virtual bool hasInstance(ExecState* exec, JSValue value, JSValue proto);

    virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);

    virtual double toNumber(ExecState*) const;

    virtual UString toString(ExecState*) const;

    virtual ConstructType getConstructData(ConstructData&);

    virtual CallType getCallData(CallData&);

    virtual const ClassInfo* classInfo() const { return &info; }

    virtual void markChildren(MarkStack& markStack)

    {

        Base::markChildren(markStack);

        m_callbackObjectData->markChildren(markStack);

    }

    void init(ExecState*);

    static JSCallbackObject* asCallbackObject(JSValue);

    static EncodedJSValue JSC_HOST_CALL call(ExecState*);

    static EncodedJSValue JSC_HOST_CALL construct(ExecState*);

    static JSValue staticValueGetter(ExecState*, JSValue, const Identifier&);

    static JSValue staticFunctionGetter(ExecState*, JSValue, const Identifier&);

    static JSValue callbackGetter(ExecState*, JSValue, const Identifier&);

    OwnPtr<JSCallbackObjectData> m_callbackObjectData;

};

} // namespace JSC

// include the actual template class implementation

#include "JSCallbackObjectFunctions.h"

#endif // JSCallbackObject_h