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// -*- C++ -*-
//
// Class: dviFile
//
// Class that represents a DVI file. Part of KDVI - A DVI previewing
// plugin for kviewshell.
//
// (C) 2004--2005 Stefan Kebekus. Distributed under the GPL.
//
#ifndef _DVIFILE_H
#define _DVIFILE_H
#include "bigEndianByteReader.h"
#include <qintdict.h>
#include <qiodevice.h>
#include <qmemarray.h>
#include <qstring.h>
class fontPool;
class pageSize;
class TeXFontDefinition;
class dvifile : public bigEndianByteReader
{
public:
/** Makes a deep copy of the old DVI file. */
dvifile(const dvifile *old, fontPool *fp );
dvifile(const QString& fname, class fontPool* pool);
~dvifile();
fontPool * font_pool;
QString filename;
QString generatorString;
Q_UINT16 total_pages;
QMemArray<Q_UINT32> page_offset;
/** Saves the DVI file. Returns true on success. */
bool saveAs(const QString &filename);
// Returns a pointer to the DVI file's data, or 0 if no data has yet
// been allocated.
Q_UINT8 * dvi_Data() {return dviData.data();}
QIODevice::Offset size_of_file;
QString errorMsg;
/** This field is set to zero when the DVI file is constructed, and
will be modified during the prescan phase (at this time the
prescan code still resides in the dviRenderer class) */
Q_UINT16 numberOfExternalPSFiles;
/** This field is set to zero when the DVI file is constructed, and
will be modified during the prescan phase (at this time the
prescan code still resides in the dviRenderer class) */
Q_UINT16 numberOfExternalNONPSFiles;
Q_UINT32 beginning_of_postamble;
/** This flag is set to "true" during the construction of the
dvifile, and is never changed afterwards by the dvifile
class. It is used in kdvi in conjuction with source-specials:
the first time a page with source specials is rendered, KDVI
shows an info dialog, and the flag is set to false. That way
KDVI ensures that the user is only informed once. */
bool sourceSpecialMarker;
QIntDict<TeXFontDefinition> tn_table;
/** Returns the number of centimeters per DVI unit in this DVI
file. */
double getCmPerDVIunit() const {return cmPerDVIunit;}
/** Returns the magnification of the DVI file, as described in the
DVI Standard. */
Q_UINT32 getMagnification() const {return _magnification;}
/** This member is set to zero on construction and can be used by
other software to count error messages that were printed when
the DVI-file was processed. Suggested application: limit the
number of error messages to, say, 25. */
Q_UINT8 errorCounter;
/** Papersize information read from the dvi-File */
pageSize *suggestedPageSize;
/** Sets new DVI data; all old data is erased. EXPERIMENTAL, use
with care. */
void setNewData(const QMemArray<Q_UINT8>& newData) {dviData = newData;}
/** Page numbers that appear in a DVI document need not be
ordered. Worse, page numbers need not be unique. This method
renumbers the pages. */
void renumber();
/** PDF to PS file conversion
This utility method takes the name of a PDF-file, and attempts to
convert it to a PS file. The dvifile internally keeps a list of
converted files, to do two thigs:
- convert files only once.
- delete all converted files on destruction
@warning The internal buffer can lead to difficulties if filenames
of PDF-files are not unique: if the content of a PDF file is
changed and this method is called a second time with the same file
name, the method will then NOT convert the file, but simply return
the name from the buffer
@returns The name of the PS file, or QString::null on failure.
*/
QString convertPDFtoPS(const QString &PDFFilename);
private:
/** process_preamble reads the information in the preamble and
stores it into global variables for later use. */
void process_preamble();
void find_postamble();
/** read_postamble reads the information in the postamble, storing
it into global variables. It also takes care of reading in all
of the pixel files for the fonts used in the job. */
void read_postamble();
void prepare_pages();
/** Offset in DVI file of last page, set in read_postamble(). */
Q_UINT32 last_page_offset;
Q_UINT32 _magnification;
double cmPerDVIunit;
QMemArray<Q_UINT8> dviData;
/** Map of filenames for converted PDF files
This map contains names of PDF files that were converted to
PostScript. The key is the name of the PDF file, the data the name
of the associated PS file, or QString::null, if the file could not
be converted. The PS files are deleted when the DVI-file is
destructed. */
QMap<QString, QString> convertedFiles;
};
#endif //ifndef _DVIFILE_H
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