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/*************************************************************************

 * @file

 *  to provide basic utilities for word pro filter

 ************************************************************************/

#ifndef INCLUDED_LOTUSWORDPRO_INC_LWPTOOLS_HXX

#define INCLUDED_LOTUSWORDPRO_INC_LWPTOOLS_HXX

#include <config_lgpl.h>

#include "lwpobjstrm.hxx"

#include "localtime.hxx"

#include "xfilter/xfdatestyle.hxx"

#include "xfilter/xftimestyle.hxx"

#include <o3tl/unit_conversion.hxx>

#include <rtl/textenc.h>

#include <stdexcept>

#include <string_view>

/**

 * @brief   tool class (unicode, conversion) for lwp filter.

*/

class LwpTools

{

public:

    static void QuickReadUnicode( LwpObjectStream* pObjStrm,

        OUString& str, sal_uInt16 strlen,  rtl_TextEncoding aEncoding );

    static bool IsUnicodePacked(LwpObjectStream* pObjStrm, sal_uInt16 len);

    inline static double ConvertFromUnits(double nUnits); // to cm

    inline static double ConvertFromTwips(double nTwips); // to cm

    inline static bool IsOddNumber(sal_uInt16 nNumber);

    inline static bool IsEvenNumber(sal_uInt16 nNumber);

    static bool isFileUrl(std::string_view fileName);

    static OUString convertToFileUrl(const OString& fileName);

    static OUString    DateTimeToOUString(const LtTm& dt);

    static std::unique_ptr<XFDateStyle> GetSystemDateStyle(bool bLongFormat);

    static std::unique_ptr<XFTimeStyle> GetSystemTimeStyle();

};

// Convert from "units" to centimeters

inline double LwpTools::ConvertFromUnits(double nUnits)

{

    constexpr sal_uInt32 UNITS_PER_INCH = 65536 * 72;

    constexpr auto mdFromIn = o3tl::getConversionMulDiv(o3tl::Length::in, o3tl::Length::cm);

    constexpr o3tl::detail::m_and_d md(mdFromIn.first, mdFromIn.second * UNITS_PER_INCH);

    return o3tl::convert(nUnits, md.m, md.d);

}

// Convert from twips to centimeters, using definition of point = 72.27 in

inline double LwpTools::ConvertFromTwips(double nTwips)

{

    constexpr auto mdFromIn = o3tl::getConversionMulDiv(o3tl::Length::in, o3tl::Length::cm);

    constexpr o3tl::detail::m_and_d md(mdFromIn.first * 100, mdFromIn.second * 7227 * 20);

    return o3tl::convert(nTwips, md.m, md.d);

}

inline bool LwpTools::IsOddNumber(sal_uInt16 nNumber)

{

    return (nNumber%2) != 0;

}

inline bool LwpTools::IsEvenNumber(sal_uInt16 nNumber)

{

    return (nNumber%2) == 0;

}

class BadSeek : public std::runtime_error

{

public:

    BadSeek() : std::runtime_error("Lotus Word Pro Bad Seek") { }

};

class BadRead: public std::runtime_error

{

public:

    BadRead() : std::runtime_error("Lotus Word Pro Bad Read") { }

};

class BadDecompress : public std::runtime_error

{

public:

    BadDecompress() : std::runtime_error("Lotus Word Pro Bad Decompress") { }

};

#endif

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