ie_imp.h

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/* -*- mode: C++; tab-width: 4; c-basic-offset: 4; -*- */

/* 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_IMP_H
#define IE_IMP_H

#include "ut_types.h"
#include "ie_types.h"

#include <map>

#include "ut_vector.h"
#include "ut_string_class.h"
#include "pd_Document.h"

#include "ut_go_file.h"
#include <gsf/gsf-input.h>

#if defined(__MINGW32__)
#undef snprintf
#define _GLIBCXX_USE_C99_DYNAMIC 1
#endif

#include <string>
#include <vector>

class PD_Document;
class IE_Imp;

class ABI_EXPORT IE_ImpSniffer
{
    friend class IE_Imp;
    
public:

    virtual ~IE_ImpSniffer();
    
    // these you get for free
    inline bool supportsFileType (IEFileType type) {return m_type == type;}
    inline IEFileType getFileType() const {return m_type;}
    
    // these you must override these next 4 methods!!!

    virtual UT_Confidence_t recognizeContents (const char * szBuf, 
                                               UT_uint32 iNumbytes);

    virtual UT_Confidence_t recognizeContents (GsfInput * input);

    virtual const IE_SuffixConfidence * getSuffixConfidence () = 0;

    virtual const IE_MimeConfidence * getMimeConfidence () = 0;

    virtual bool getDlgLabels (const char ** szDesc,
                   const char ** szSuffixList,
                   IEFileType * ft) = 0;
    virtual UT_Error constructImporter (PD_Document * pDocument,
                        IE_Imp ** ppie) = 0;
    
    const UT_UTF8String & name () const { return m_name; }

    bool getCanPaste () const {
        return m_bCanPaste;
    }
protected:
    IE_ImpSniffer(const char * name, bool canPaste = false);

private:
    const UT_UTF8String m_name;

    // only IE_Imp ever calls this
    inline void setFileType (IEFileType type) {m_type = type;}
    IEFileType m_type;

    bool m_bCanPaste;
};

class ABI_EXPORT IE_Imp
{
public:
    
    // constructs an importer of the right type based upon
    // either the filename or sniffing the file.  caller is
    // responsible for destroying the importer when finished
    // with it.

    static IEFileType   fileTypeForContents(const char * szBuf,
                            UT_uint32 iNumbytes);
    
    static IEFileType   fileTypeForSuffix(const char * szSuffix);
    static IEFileType   fileTypeForDescription(const char * szSuffix);
    static IEFileType   fileTypeForMimetype(const char * szMimetype);

    static IEFileType fileTypeForSuffixes(const char * suffixList);

    static IE_ImpSniffer * snifferForFileType(IEFileType ieft);
    static const char * suffixesForFileType(IEFileType ieft);
    static const char * descriptionForFileType(IEFileType ieft);
    
    static UT_Error constructImporter(PD_Document * pDocument,
                                      const char * szFilename,
                                      IEFileType ieft,
                                      IE_Imp ** ppie, 
                                      IEFileType * pieft = NULL);

    static UT_Error constructImporter(PD_Document * pDocument,
                                      GsfInput * input,
                                      IEFileType ieft,
                                      IE_Imp ** ppie, 
                                      IEFileType * pieft = NULL);

    static UT_Error constructImporter(PD_Document * pDocument,
                                      IEFileType ieft,
                                      IE_Imp ** ppie, 
                                      IEFileType * pieft = NULL);
    
    static bool     enumerateDlgLabels(UT_uint32 ndx,
                           const char ** pszDesc,
                           const char ** pszSuffixList,
                           IEFileType * ft);

    static UT_uint32    getImporterCount(void); 
    static void registerImporter (IE_ImpSniffer * sniffer);
    static void unregisterImporter (IE_ImpSniffer * sniffer);
    static void unregisterAllImporters ();
    static std::vector<std::string> & getSupportedMimeTypes ();
    static std::vector<std::string> & getSupportedMimeClasses ();
    static std::vector<std::string> & getSupportedSuffixes ();
    static const char * getMimeTypeForSuffix (const char * suffix);

    virtual ~IE_Imp();

    // kept around for backwards compat
    UT_Error importFile(const char * szFilename);
    UT_Error importFile(GsfInput * input);

    static UT_Error loadFile(PD_Document * doc, const char * szFilename, IEFileType ieft = IEFT_Unknown, const char * props = NULL, IEFileType * savedAsType = NULL);
    static UT_Error loadFile(PD_Document * doc, GsfInput * input, IEFileType ieft = IEFT_Unknown, const char * props = NULL, IEFileType * savedAsType = NULL);

    // default impl
    virtual  bool       pasteFromBuffer(PD_DocumentRange * pDocRange,
                        const unsigned char * pData, 
                        UT_uint32 lenData, 
                        const char * szEncoding = 0);

    PD_Document *           getDoc() const;

    void setLoadStylesOnly(bool b) {m_bStylesOnly = b;}
    bool getLoadStylesOnly() const {return m_bStylesOnly;}
    virtual bool supportsLoadStylesOnly() {return false;}

    void setLoadDocProps(bool b) {m_bDocProps = b;}
    bool getLoadDocProps() const {return m_bDocProps;}
    
    UT_Confidence_t getFidelity () const {
        return m_fidelity;
    }

    void setProps (const char * props);
    bool isPasting(void) const { return m_isPaste;}

 protected:
    IE_Imp(PD_Document * pDocument, UT_Confidence_t fidelity = 0);

    PT_DocPosition getDocPos() const;
    void setClipboard (PT_DocPosition dpos);
    bool isClipboard () const;

    virtual bool appendStrux (PTStruxType pts, const gchar ** attributes);
    virtual bool appendStruxFmt(pf_Frag_Strux * pfs, const gchar ** attributes);
    virtual bool appendSpan (const UT_UCSChar * p, UT_uint32 length);
    virtual bool appendObject (PTObjectType pto, const gchar ** attribs,
                       const gchar ** props = NULL);
    virtual bool appendFmt(const gchar ** attributes);
    virtual bool appendFmt(const UT_GenericVector<const gchar*>* pVecAttributes);

    virtual UT_Error _loadFile (GsfInput * input) = 0;

public:
    const std::string & getProperty (const char * key) {
        return m_props_map[key];
    }

 private:
    PD_Document * m_pDocument;
    bool m_isPaste;
    PT_DocPosition m_dpos;
    bool m_bStylesOnly;
    bool m_bDocProps;

    typedef std::map<std::string, std::string> map_type;
    map_type m_props_map;

    UT_Confidence_t m_fidelity;
};

class ABI_EXPORT GsfInputMarker
{
    GsfInput *m_input;
    gsf_off_t m_position;
    bool m_reset;

    GsfInputMarker();
    GsfInputMarker(const GsfInputMarker & rhs);
    GsfInputMarker& operator=(const GsfInputMarker &rhs);

public:
    GsfInputMarker(GsfInput * input)
        : m_input(input), m_position(gsf_input_tell(input)), m_reset(false)
    {
        g_object_ref(G_OBJECT(m_input));
    }

    ~GsfInputMarker()
    {
        reset();
        g_object_unref(G_OBJECT(m_input));
    }

    void reset()
    {
        if(!m_reset)
            {
                gsf_input_seek(m_input, m_position, G_SEEK_SET);
                m_reset = true;
            }
    }
};


#endif /* IE_IMP_H */

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