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[wxWidgets.git] / utils / tex2rtf / src / tex2any.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        tex2any.cpp
// Purpose:     Utilities for Latex conversion.
// Author:      Julian Smart
// Modified by:
// Created:     01/01/99
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

#include <ctype.h>
#include "tex2any.h"
#include <stdlib.h>
#include <time.h>

/*
 * Variables accessible from clients
 *
 */
 
TexChunk *      DocumentTitle = NULL;
TexChunk *      DocumentAuthor = NULL;
TexChunk *      DocumentDate = NULL;

// Header/footers/pagestyle
TexChunk *      LeftHeaderEven = NULL;
TexChunk *      LeftFooterEven = NULL;
TexChunk *      CentreHeaderEven = NULL;
TexChunk *      CentreFooterEven = NULL;
TexChunk *      RightHeaderEven = NULL;
TexChunk *      RightFooterEven = NULL;
TexChunk *      LeftHeaderOdd = NULL;
TexChunk *      LeftFooterOdd = NULL;
TexChunk *      CentreHeaderOdd = NULL;
TexChunk *      CentreFooterOdd = NULL;
TexChunk *      RightHeaderOdd = NULL;
TexChunk *      RightFooterOdd = NULL;
char *          PageStyle = copystring("plain");

int             DocumentStyle = LATEX_REPORT;
int             MinorDocumentStyle = 0;
wxPathList      TexPathList;
char *          BibliographyStyleString = copystring("plain");
char *          DocumentStyleString = copystring("report");
char *          MinorDocumentStyleString = NULL;
int             ParSkip = 0;
int             ParIndent = 0;

int             normalFont = 10;
int             smallFont = 8;
int             tinyFont = 6;
int             largeFont1 = 12;
int             LargeFont2 = 14;
int             LARGEFont3 = 18;
int             hugeFont1 = 20;
int             HugeFont2 = 24;
int             HUGEFont3 = 28;

// All of these tokens MUST be found on a line by themselves (no other
// text) and must start at the first character of the line, or tex2rtf
// will fail to process them correctly (a limitation of tex2rtf, not TeX)
static const wxString syntaxTokens[] =
{ "\\begin{verbatim}",
  "\\begin{toocomplex}",
  "\\end{verbatim}",
  "\\end{toocomplex}",
  "\\verb",
  "\\begin{comment}",
  "\\end{comment}",
  "\\verbatiminput",
//  "\\par",
  "\\input",
  "\\helpinput",
  "\\include",
  wxEmptyString
};


/*
 * USER-ADJUSTABLE SETTINGS
 *
 */

// Section font sizes
int             chapterFont =    12; // LARGEFont3;
int             sectionFont =    12; // LargeFont2;
int             subsectionFont = 12; // largeFont1;
int             titleFont = LARGEFont3;
int             authorFont = LargeFont2;
int             mirrorMargins = TRUE;
bool            winHelp = FALSE;  // Output in Windows Help format if TRUE, linear otherwise
bool            isInteractive = FALSE;
bool            runTwice = FALSE;
int             convertMode = TEX_RTF;
bool            checkCurleyBraces = FALSE;
bool            checkSyntax = FALSE;
bool            headerRule = FALSE;
bool            footerRule = FALSE;
bool            compatibilityMode = FALSE; // If TRUE, maximum Latex compatibility
                                // (Quality of RTF generation deteriorate)
bool            generateHPJ; // Generate WinHelp Help Project file
char            *winHelpTitle = NULL; // Windows Help title
int             defaultTableColumnWidth = 2000;

int             labelIndentTab = 18;  // From left indent to item label (points)
int             itemIndentTab = 40;   // From left indent to item (points)

bool            useUpButton = TRUE;
int             htmlBrowseButtons = HTML_BUTTONS_TEXT;

bool            truncateFilenames = FALSE; // Truncate for DOS
int             winHelpVersion = 3; // WinHelp Version (3 for Windows 3.1, 4 for Win95)
bool            winHelpContents = FALSE; // Generate .cnt file for WinHelp 4
bool            htmlIndex = FALSE; // Generate .htx file for HTML
bool            htmlFrameContents = FALSE; // Use frames for HTML contents page
bool            useHeadingStyles = TRUE; // Insert \s1, s2 etc.
bool            useWord = TRUE; // Insert proper Word table of contents, etc etc
int             contentsDepth = 4; // Depth of Word table of contents
bool            indexSubsections = TRUE; // Index subsections in linear RTF
// Linear RTF method of including bitmaps. Can be "includepicture", "hex"
char            *bitmapMethod = copystring("includepicture");
bool            upperCaseNames = FALSE;
// HTML background and text colours
char            *backgroundImageString = NULL;
char            *backgroundColourString = copystring("255;255;255");
char            *textColourString = NULL;
char            *linkColourString = NULL;
char            *followedLinkColourString = NULL;
bool            combineSubSections = FALSE;
bool            htmlWorkshopFiles = FALSE;

extern int passNumber;

extern wxHashTable TexReferences;

/*
 * International support
 */

// Names to help with internationalisation
char *ContentsNameString = copystring("Contents");
char *AbstractNameString = copystring("Abstract");
char *GlossaryNameString = copystring("Glossary");
char *ReferencesNameString = copystring("References");
char *FiguresNameString = copystring("List of Figures");
char *TablesNameString = copystring("List of Tables");
char *FigureNameString = copystring("Figure");
char *TableNameString = copystring("Table");
char *IndexNameString = copystring("Index");
char *ChapterNameString = copystring("chapter");
char *SectionNameString = copystring("section");
char *SubsectionNameString = copystring("subsection");
char *SubsubsectionNameString = copystring("subsubsection");
char *UpNameString = copystring("Up");

/*
 * Section numbering
 *
 */
 
int             chapterNo = 0;
int             sectionNo = 0;
int             subsectionNo = 0;
int             subsubsectionNo = 0;
int             figureNo = 0;
int             tableNo = 0;

/*
 * Other variables
 *
 */
 
FILE *CurrentOutput1 = NULL;
FILE *CurrentOutput2 = NULL;
FILE *Inputs[15];
int LineNumbers[15];
char *FileNames[15];
int CurrentInputIndex = 0;

char *TexFileRoot = NULL;
char *TexBibName = NULL;         // Bibliography output file name
char *TexTmpBibName = NULL;      // Temporary bibliography output file name
bool isSync = FALSE;             // If TRUE, should not yield to other processes.
bool stopRunning = FALSE;        // If TRUE, should abort.

static int currentColumn = 0;
char *currentArgData = NULL;
bool haveArgData = FALSE; // If TRUE, we're simulating the data.
TexChunk *currentArgument = NULL;
TexChunk *nextChunk = NULL;
bool isArgOptional = FALSE;
int noArgs = 0;

TexChunk *TopLevel = NULL;
// wxList MacroDefs(wxKEY_STRING);
wxHashTable MacroDefs(wxKEY_STRING);
wxStringList IgnorableInputFiles; // Ignorable \input files, e.g. psbox.tex
char *BigBuffer = NULL;  // For reading in large chunks of text
TexMacroDef *SoloBlockDef = NULL;
TexMacroDef *VerbatimMacroDef = NULL;

#define IncrementLineNumber() LineNumbers[CurrentInputIndex] ++


TexRef::TexRef(char *label, char *file, char *section, char *sectionN)
{
    refLabel = copystring(label);
    refFile = file ? copystring(file) : (char*) NULL;
    sectionNumber = section ? copystring(section) : copystring("??");
    sectionName = sectionN ? copystring(sectionN) : copystring("??");
}

TexRef::~TexRef(void)
{
    delete [] refLabel;      refLabel = NULL;
    delete [] refFile;       refFile = NULL;
    delete [] sectionNumber; sectionNumber = NULL;
    delete [] sectionName;   sectionName = NULL;
}


CustomMacro::~CustomMacro()
{
    if (macroName)
        delete [] macroName;
    if (macroBody)
        delete [] macroBody;
}

void TexOutput(char *s, bool ordinaryText)
{
  int len = strlen(s);

  // Update current column, but only if we're guaranteed to
  // be ordinary text (not mark-up stuff)
  int i;
  if (ordinaryText)
    for (i = 0; i < len; i++)
    {
      if (s[i] == 13 || s[i] == 10)
        currentColumn = 0;
      else
        currentColumn ++;
    }

  if (CurrentOutput1)
    fprintf(CurrentOutput1, "%s", s);
  if (CurrentOutput2)
    fprintf(CurrentOutput2, "%s", s);
}

/*
 * Try to find a Latex macro, in one of the following forms:
 * (1) \begin{} ... \end{}
 * (2) \macroname{arg1}...{argn}
 * (3) {\bf arg1}
 */

void ForbidWarning(TexMacroDef *def)
{
  wxString informBuf;
  switch (def->forbidden)
  {
    case FORBID_WARN:
    {
      informBuf.Printf("Warning: it is recommended that command %s is not used.", def->name);
      OnInform((char *)informBuf.c_str());
      break;
    }
    case FORBID_ABSOLUTELY:
    {
      informBuf.Printf("Error: command %s cannot be used and will lead to errors.", def->name);
      OnInform((char *)informBuf.c_str());
      break;
    }
    default:
      break;
  }
}
 
TexMacroDef *MatchMacro(char *buffer, int *pos, char **env, bool *parseToBrace)
{
  *parseToBrace = TRUE;
  int i = (*pos);
  TexMacroDef *def = NULL;
  char macroBuf[40];

  // First, try to find begin{thing}
  if (strncmp(buffer+i, "begin{", 6) == 0)
  {
    i += 6;

    int j = i;
    while ((isalpha(buffer[j]) || buffer[j] == '*') && ((j - i) < 39))
    {
      macroBuf[j-i] = buffer[j];
      j ++;
    }
    macroBuf[j-i] = 0;
    def = (TexMacroDef *)MacroDefs.Get(macroBuf);

    if (def)
    {
      *pos = j + 1;  // BUGBUG Should this be + 1???
      *env = def->name;
      ForbidWarning(def);
      return def;
    }
    else return NULL;
  }

  // Failed, so try to find macro from definition list
  int j = i;

  // First try getting a one-character macro, but ONLY
  // if these TWO characters are not both alphabetical (could
  // be a longer macro)
  if (!(isalpha(buffer[i]) && isalpha(buffer[i+1])))
  {
    macroBuf[0] = buffer[i];
    macroBuf[1] = 0;

    def = (TexMacroDef *)MacroDefs.Get(macroBuf);
    if (def) j ++;
  }

  if (!def)
  {
    while ((isalpha(buffer[j]) || buffer[j] == '*') && ((j - i) < 39))
    {
      macroBuf[j-i] = buffer[j];
      j ++;
    }
    macroBuf[j-i] = 0;
    def = (TexMacroDef *)MacroDefs.Get(macroBuf);
  }
    
  if (def)
  {
    i = j;
    
    // We want to check whether this is a space-consuming macro
    // (e.g. {\bf word})
    // No brace, e.g. \input thing.tex instead of \input{thing};
    // or a numeric argument, such as \parindent0pt
    if ((def->no_args > 0) && ((buffer[i] == 32) || (buffer[i] == '=') || (isdigit(buffer[i]))))
    {
      if ((buffer[i] == 32) || (buffer[i] == '='))
        i ++;

      *parseToBrace = FALSE;
    }
    *pos = i;
    ForbidWarning(def);
    return def;
  }
  return NULL;
}

void EatWhiteSpace(char *buffer, int *pos)
{
  int len = strlen(buffer);
  int j = *pos;
  bool keepGoing = TRUE;
  bool moreLines = TRUE;
  while ((j < len) && keepGoing &&
         (buffer[j] == 10 || buffer[j] == 13 || buffer[j] == ' ' || buffer[j] == 9))
  {
    j ++;
    if (j >= len)
    {
      if (moreLines)
      {
        moreLines = read_a_line(buffer);
        len = strlen(buffer);
        j = 0;
      }
      else
        keepGoing = FALSE;
    }
  }
  *pos = j;
}

bool FindEndEnvironment(char *buffer, int *pos, char *env)
{
  int i = (*pos);

  // Try to find end{thing}
  if ((strncmp(buffer+i, "end{", 4) == 0) &&
      (strncmp(buffer+i+4, env, strlen(env)) == 0))
  {
    *pos = i + 5 + strlen(env);
    return TRUE;
  }
  else return FALSE;
}

bool readingVerbatim = FALSE;
bool readInVerbatim = FALSE;  // Within a verbatim, but not nec. verbatiminput

// Switched this off because e.g. \verb${$ causes it to fail. There is no
// detection of \verb yet.
// #define CHECK_BRACES 1

unsigned long leftCurley = 0;
unsigned long rightCurley = 0;
static wxString currentFileName = "";

bool read_a_line(char *buf)
{
  if (CurrentInputIndex < 0)
  {
    buf[0] = 0;
    return FALSE;
  }

  int ch = -2;
  int bufIndex = 0;
  buf[0] = 0;

  while (ch != EOF && ch != 10)
  {
    if (bufIndex >= MAX_LINE_BUFFER_SIZE)
    {
       wxString errBuf;
       errBuf.Printf("Line %lu of file %s is too long.  Lines can be no longer than %lu characters.  Truncated.",
           LineNumbers[CurrentInputIndex], (const char*) currentFileName.c_str(),MAX_LINE_BUFFER_SIZE);
       OnError((char *)errBuf.c_str());
       return FALSE;
    }

    if (((bufIndex == 14) && (strncmp(buf, "\\end{verbatim}", 14) == 0)) ||
         ((bufIndex == 16) && (strncmp(buf, "\\end{toocomplex}", 16) == 0)))
      readInVerbatim = FALSE;

    ch = getc(Inputs[CurrentInputIndex]);

    if (checkCurleyBraces)
    {
        if (ch == '{' && !readInVerbatim)
           leftCurley++;
        if (ch == '}' && !readInVerbatim)
        {
           rightCurley++;
           if (rightCurley > leftCurley)
           {
               wxString errBuf;
               errBuf.Printf("An extra right Curley brace ('}') was detected at line %lu inside file %s",LineNumbers[CurrentInputIndex], (const char*) currentFileName.c_str());
               OnError((char *)errBuf.c_str());

               // Reduce the count of right Curley braces, so the mismatched count
               // isn't reported on every line that has a '}' after the first mismatch
               rightCurley--;
           }
        }
    }

    if (ch != EOF)
    {
      // Check for 2 consecutive newlines and replace with \par
      if (ch == 10 && !readInVerbatim)
      {
        int ch1 = getc(Inputs[CurrentInputIndex]);
        if ((ch1 == 10) || (ch1 == 13))
        {
          // Eliminate newline (10) following DOS linefeed
          if (ch1 == 13) 
            ch1 = getc(Inputs[CurrentInputIndex]);
          buf[bufIndex] = 0;
          IncrementLineNumber();
//          strcat(buf, "\\par\n");
//          i += 6;
          if (bufIndex+5 >= MAX_LINE_BUFFER_SIZE)
          {
             wxString errBuf;
             errBuf.Printf("Line %lu of file %s is too long.  Lines can be no longer than %lu characters.  Truncated.",
                 LineNumbers[CurrentInputIndex], (const char*) currentFileName.c_str(),MAX_LINE_BUFFER_SIZE);
             OnError((char *)errBuf.c_str());
             return FALSE;
          }
          strcat(buf, "\\par");
          bufIndex += 5;

        }
        else
        {
          ungetc(ch1, Inputs[CurrentInputIndex]);
          if (bufIndex >= MAX_LINE_BUFFER_SIZE)
          {
             wxString errBuf;
             errBuf.Printf("Line %lu of file %s is too long.  Lines can be no longer than %lu characters.  Truncated.",
                 LineNumbers[CurrentInputIndex], (const char*) currentFileName.c_str(),MAX_LINE_BUFFER_SIZE);
             OnError((char *)errBuf.c_str());
             return FALSE;
          }

          buf[bufIndex] = ch;
          bufIndex ++;
        }
      }
      else
      {

        // Convert embedded characters to RTF equivalents
        switch(ch)
        {