///////////////////////////////////////////////////////////////////////////////
// Name:        wx/msw/rt/utils.h
// Purpose:     Windows Runtime Objects helper functions and objects
// Author:      Tobias Taschner
// Created:     2015-09-05
// Copyright:   (c) 2015 wxWidgets development team
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef   _WX_MSW_RTUTILS_H
#define   _WX_MSW_RTUTILS_H

#include "wx/defs.h"

#if wxUSE_WINRT

#include "wx/string.h"
#include "wx/msw/wrapwin.h"

#include <winstring.h>

namespace wxWinRT
{

bool WXDLLIMPEXP_CORE IsAvailable();

bool WXDLLIMPEXP_CORE Initialize();

void WXDLLIMPEXP_CORE Uninitialize();

bool WXDLLIMPEXP_CORE GetActivationFactory(const wxString& activatableClassId, REFIID iid, void ** factory);

// RAII class initializing WinRT in its ctor and undoing it in its dtor.
class WXDLLIMPEXP_CORE Initializer
{
public:
    Initializer()
        : m_ok(Initialize())
    {
    }

    bool IsOk() const
    {
        return m_ok;
    }

    ~Initializer()
    {
        if (m_ok)
            Uninitialize();
    }

private:
    const bool m_ok;

    wxDECLARE_NO_COPY_CLASS(Initializer);
};

// Simple class to convert wxString to HSTRING
// This just wraps a reference to the wxString object,
// which needs a life time greater than the TempStringRef object
class WXDLLIMPEXP_CORE TempStringRef
{
public:
    HSTRING Get() const { return m_hstring; }

    operator HSTRING() const { return m_hstring; };

    static const TempStringRef Make(const wxString &str);

private:
    TempStringRef(const wxString &str);

    HSTRING             m_hstring;
    HSTRING_HEADER      m_header;

    wxDECLARE_NO_COPY_CLASS(TempStringRef);
};

} // namespace wxWinRT

#endif // wxUSE_WINRT

#endif // _WX_MSW_RTUTILS_H