Source/WebCore/accessibility/win/AccessibilityObjectWrapperWin.h

/*
 * Copyright (C) 2008 Apple 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:
 * 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 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 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. 
 */

#pragma once

#include <unknwn.h>
#include <wtf/text/AtomicString.h>

namespace WebCore {

    class AccessibilityObject;
 
    class AccessibilityObjectWrapper : public IUnknown {
    public:
        // IUnknown
        virtual HRESULT STDMETHODCALLTYPE QueryInterface(_In_ REFIID riid, _COM_Outptr_ void** ppvObject) = 0;        
        virtual ULONG STDMETHODCALLTYPE AddRef() = 0;
        virtual ULONG STDMETHODCALLTYPE Release(void) = 0;

        virtual void detach() = 0;
        bool attached() const { return m_object; }
        AccessibilityObject* accessibilityObject() const { return m_object; }

        void accessibilityAttributeValue(const AtomicString&, VARIANT*);

    protected:
        AccessibilityObjectWrapper(AccessibilityObject* obj) : m_object(obj) { }
        AccessibilityObjectWrapper() : m_object(nullptr) { }

        AccessibilityObject* m_object;
    };

} // namespace WebCore