ie_exp_Text.h

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/* AbiWord
 * Copyright (C) 1998 AbiSource, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */


#ifndef IE_EXP_TEXT_H
#define IE_EXP_TEXT_H

#include "ie_exp.h"
#include "pl_Listener.h"
#include "ut_wctomb.h"

#define MY_MB_LEN_MAX 6

class PD_Document;
class Text_Listener;

// The exporter/writer for Plain Text Files.

class ABI_EXPORT IE_Exp_Text_Sniffer : public IE_ExpSniffer
{
    friend class IE_Exp;

public:
    IE_Exp_Text_Sniffer ();
    virtual ~IE_Exp_Text_Sniffer ();

    UT_Confidence_t supportsMIME (const char * szMIME);

    virtual bool recognizeSuffix (const char * szSuffix);
    virtual bool getDlgLabels (const char ** szDesc,
                               const char ** szSuffixList,
                               IEFileType * ft);
    virtual UT_Error constructExporter (PD_Document * pDocument,
                                        IE_Exp ** ppie);
};

// The exporter/writer for Plain Text Files with selectable encoding.

class ABI_EXPORT IE_Exp_EncodedText_Sniffer : public IE_ExpSniffer
{
    friend class IE_Exp;

public:
    IE_Exp_EncodedText_Sniffer ();
    virtual ~IE_Exp_EncodedText_Sniffer ();

    virtual bool recognizeSuffix (const char * szSuffix);
    virtual bool getDlgLabels (const char ** szDesc,
                               const char ** szSuffixList,
                               IEFileType * ft);
    virtual UT_Error constructExporter (PD_Document * pDocument,
                                        IE_Exp ** ppie);
};

class ABI_EXPORT IE_Exp_Text : public IE_Exp
{
public:
    IE_Exp_Text(PD_Document * pDocument, bool bEncoded=false);
    IE_Exp_Text(PD_Document * pDocument, const char * encoding);
    virtual ~IE_Exp_Text();

protected:
    virtual PL_Listener *   _constructListener(void);
    virtual UT_Error    _writeDocument(void);
    bool                _doEncodingDialog(const char *szEncoding);
    void                _setEncoding(const char *szEncoding);

 private:
    PL_Listener *       m_pListener;
    bool                m_bIsEncoded;
    const char *        m_szEncoding;
    bool m_bExplicitlySetEncoding;
    bool                m_bIs16Bit;
    bool                m_bUnicode;
    bool                m_bBigEndian;
    bool                m_bUseBOM;
};

// a private listener class to help us translate the document
// into a text stream.

class ABI_EXPORT Text_Listener : public PL_Listener
{
public:
    Text_Listener(PD_Document * pDocument,
                    IE_Exp_Text * pie,
                    bool bToClipboard = false,
                    const char *szEncoding = 0,
                    bool bIs16Bit = false,
                    bool m_bUnicode = false,
                    bool bUseBOM = false,
                    bool bBigEndian = false);
    virtual ~Text_Listener();

    virtual bool        populate(PL_StruxFmtHandle sfh,
                                 const PX_ChangeRecord * pcr);

    virtual bool        populateStrux(PL_StruxDocHandle sdh,
                                      const PX_ChangeRecord * pcr,
                                      PL_StruxFmtHandle * psfh);

    virtual bool        change(PL_StruxFmtHandle sfh,
                               const PX_ChangeRecord * pcr);

    virtual bool        insertStrux(PL_StruxFmtHandle sfh,
                                    const PX_ChangeRecord * pcr,
                                    PL_StruxDocHandle sdh,
                                    PL_ListenerId lid,
                                    void (* pfnBindHandles)(PL_StruxDocHandle sdhNew,
                                                            PL_ListenerId lid,
                                                            PL_StruxFmtHandle sfhNew));

    virtual bool        signal(UT_uint32 iSignal);

protected:
    int         _wctomb(char * pC, int & length, UT_UCS4Char wc) { return m_wctomb.wctomb(pC,length,wc); }
    void                _genBOM(void);
    void                _genLineBreak(void);
    virtual void        _outputData(const UT_UCSChar * p, UT_uint32 length);
    void                _closeBlock(void);
    void                _handleDirMarker(PT_AttrPropIndex apiSpan);

 private:
    enum _dirOverride
    {
        DO_LTR,
        DO_RTL,
        DO_UNSET
    };
    
    

    PD_Document *       m_pDocument;
    IE_Exp_Text *       m_pie;
    UT_Wctomb           m_wctomb;
    char                m_mbBOM[MY_MB_LEN_MAX];
    int                 m_iBOMLen;
    char                m_mbLineBreak[MY_MB_LEN_MAX*2];
    int                 m_iLineBreakLen;
    bool                m_bInBlock;
    bool                m_bToClipboard;
    bool                m_bFirstWrite;
    const char *        m_szEncoding;
    bool                m_bIs16Bit;
    bool                m_bBigEndian;
    bool                m_bUnicode;
    bool                m_bUseBOM;
    bool                m_bBreakExtra;
    _dirOverride        m_eDirOverride;
    _dirOverride        m_eDirMarkerPending;
    _dirOverride        m_eSectionDir;
    _dirOverride        m_eDocDir;
};

#endif /* IE_EXP_TEXT_H */

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