/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_TOOLS_RESID_HXX
#define INCLUDED_TOOLS_RESID_HXX

#include <osl/diagnose.h>
#include <rtl/ustring.hxx>
#include <tools/solar.h>
#include <tools/toolsdllapi.h>

struct RSHEADER_TYPE;
typedef sal_uInt32 RESOURCE_TYPE;
#define RSC_NOTYPE              0x100
#define RSC_DONTRELEASE         (sal_uInt32(1U << 31))

class ResMgr;

class ResId
{
    /*
    consider two cases: either m_pResource is valid and points
    two a resource data buffer; then m_nResId and m_pResMgr are
    not used and may be 0 resp. NULL
    or m_pResource is NULL, the m_nResId and m_pResMgr must be valid.
    In this case the highest bit if set decides whether to
    not to release the Resource context after loading this id
    */
    RSHEADER_TYPE*          m_pResource;

    mutable sal_uInt32      m_nResId;      // Resource Identifier
    mutable RESOURCE_TYPE   m_nRT;         // type for loading (mutable to be set later)
    mutable ResMgr *        m_pResMgr;     // load from this ResMgr (mutable for setting on demand)
    mutable RESOURCE_TYPE   m_nRT2;        // type for loading (supersedes m_nRT)
    mutable sal_uInt32      m_nWinBits;    // container for original style bits on a window in a resource

    void ImplInit( sal_uInt32 nId, ResMgr& rMgr, RSHEADER_TYPE* pRes )
    {
        m_pResource = pRes; m_nResId = nId; m_nRT = RSC_NOTYPE; m_pResMgr = &rMgr; m_nRT2 = RSC_NOTYPE; m_nWinBits = 0;
        OSL_ENSURE( m_pResMgr != NULL, "ResId without ResMgr created" );
    }

public:
    ResId( RSHEADER_TYPE * pRc, ResMgr& rMgr )
    {
        ImplInit( 0, rMgr, pRc );
    }
    ResId( sal_uInt32 nId, ResMgr& rMgr )
    {
        ImplInit( nId, rMgr, NULL );
    }

    sal_uInt32 GetWinBits() const { return m_nWinBits; }
    void SetWinBits( sal_uInt32 nBits ) const { m_nWinBits = nBits; }

    RESOURCE_TYPE   GetRT() const { return m_nRT; }

    /** Set the type if not already set. Ask for type with GetRT()

    [Example]
    ResId aId( 1000 );
    aId.SetRT( RSC_WINDOW );    // settype window Window
    aId.SetRT( RSC_BUTTON );    // will not set type Button
    //aId.GetRT() == RSC_WINDOW is true

    @see
    ResId::GetRT2(), ResId::GetRT()
    */
    const ResId &   SetRT( RESOURCE_TYPE nType ) const
    {
        if( RSC_NOTYPE == m_nRT )
            m_nRT = nType;
        return *this;
    }

    /** Get the effective type (m_nRT2 or m_nRT1)

    A second resource type is used to supersede settings
    of the base class ( e.g. Window )
    */
    RESOURCE_TYPE   GetRT2() const
    {
        return (RSC_NOTYPE == m_nRT2) ? m_nRT : m_nRT2;
    }

    /** Set the superceding type. Ask spcifically for it with GetRT2()

    SetRT2() may only be called if no derived class calls SetRT in its
    Resource constructor.
    */
    const ResId &   SetRT2( RESOURCE_TYPE nTyp ) const
    {
        if( RSC_NOTYPE == m_nRT2 )
            m_nRT2 = nTyp;
        return *this;
    }

    ResMgr *        GetResMgr() const { return m_pResMgr; }
    const ResId &   SetResMgr( ResMgr * pMgr ) const
    {
        m_pResMgr = pMgr;
        OSL_ENSURE( m_pResMgr != NULL, "invalid ResMgr set on ResId" );
        return *this;
    }

    const ResId &  SetAutoRelease(bool bRelease) const
    {
        if( bRelease )
            m_nResId &= ~RSC_DONTRELEASE;
        else
            m_nResId |= RSC_DONTRELEASE;
        return *this;
    }

    bool        IsAutoRelease()  const
        { return !(m_nResId & RSC_DONTRELEASE); }

    sal_uInt32      GetId()        const { return m_nResId & ~RSC_DONTRELEASE; }
    RSHEADER_TYPE*  GetpResource() const { return m_pResource; }

    TOOLS_DLLPUBLIC OUString toString() const;
    TOOLS_DLLPUBLIC operator OUString() const { return toString(); }
};

#endif

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