/*

 * Copyright (C) 2010 Google Inc. All rights reserved.

 *

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

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

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

 *     * 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.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "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 THE COPYRIGHT

 * OWNER 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,

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

 */

#ifndef WrapperTypeInfo_h

#define WrapperTypeInfo_h

#include <v8.h>

namespace WebCore {

    class ActiveDOMObject;

    static const int v8DOMWrapperTypeIndex = 0;

    static const int v8DOMWrapperObjectIndex = 1;

    static const int v8DOMHiddenReferenceArrayIndex = 2;

    static const int v8DefaultWrapperInternalFieldCount = 3;

    typedef v8::Persistent<v8::FunctionTemplate> (*GetTemplateFunction)();

    typedef void (*DerefObjectFunction)(void*);

    typedef ActiveDOMObject* (*ToActiveDOMObjectFunction)(v8::Handle<v8::Object>);

    // This struct provides a way to store a bunch of information that is helpful when unwrapping

    // v8 objects. Each v8 bindings class has exactly one static WrapperTypeInfo member, so

    // comparing pointers is a safe way to determine if types match.

    struct WrapperTypeInfo {

        static WrapperTypeInfo* unwrap(v8::Handle<v8::Value> typeInfoWrapper)

        {

            return reinterpret_cast<WrapperTypeInfo*>(v8::External::Unwrap(typeInfoWrapper));

        }

        bool equals(const WrapperTypeInfo* that) const

        {

            return this == that;

        }

        v8::Persistent<v8::FunctionTemplate> getTemplate() { return getTemplateFunction(); }

        void derefObject(void* object)

        {

            if (derefObjectFunction) 

                derefObjectFunction(object);

        }

        ActiveDOMObject* toActiveDOMObject(v8::Handle<v8::Object> object)

        {

            if (!toActiveDOMObjectFunction)

                return 0;

            return toActiveDOMObjectFunction(object);

        }

        const GetTemplateFunction getTemplateFunction;

        const DerefObjectFunction derefObjectFunction;

        const ToActiveDOMObjectFunction toActiveDOMObjectFunction;

    };

}

#endif // WrapperTypeInfo_h