tex2any.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

    wxFprintf(CurrentOutput1, _T("%s"), s);
  if (CurrentOutput2)
    wxFprintf(CurrentOutput2, _T("%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(_T("Warning: it is recommended that command %s is not used."), def->name);
      OnInform((const wxChar *)informBuf.c_str());
      break;
    }
    case FORBID_ABSOLUTELY:
    {
      informBuf.Printf(_T("Error: command %s cannot be used and will lead to errors."), def->name);
      OnInform((const wxChar *)informBuf.c_str());
      break;
    }
    default:
      break;
  }
}

TexMacroDef *MatchMacro(wxChar *buffer, int *pos, wxChar **env, bool *parseToBrace)
{
    *parseToBrace = true;
    int i = (*pos);
    TexMacroDef *def = NULL;
    wxChar macroBuf[40];

    // First, try to find begin{thing}
    if (wxStrncmp(buffer+i, _T("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(wxChar *buffer, int *pos)
{
  int len = wxStrlen(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 = wxStrlen(buffer);
        j = 0;
      }
      else
        keepGoing = false;
    }
  }
  *pos = j;
}

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

  // Try to find end{thing}
  if ((wxStrncmp(buffer+i, _T("end{"), 4) == 0) &&
      (wxStrncmp(buffer+i+4, env, wxStrlen(env)) == 0))
  {
    *pos = i + 5 + wxStrlen(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 leftCurly = 0;
unsigned long rightCurly = 0;
static wxString currentFileName = wxEmptyString;

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

  int ch = -2;
  unsigned long bufIndex = 0;
  buf[0] = 0;
  int lastChar;

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

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

    lastChar = ch;
    ch = getc(Inputs[CurrentInputIndex]);

    if (checkCurlyBraces)
    {
        if (ch == '{' && !readInVerbatim && lastChar != _T('\\'))
           leftCurly++;
        if (ch == '}' && !readInVerbatim && lastChar != _T('\\'))
        {
           rightCurly++;
           if (rightCurly > leftCurly)
           {
               wxString errBuf;
               errBuf.Printf(_T("An extra right Curly brace ('}') was detected at line %lu inside file %s"), LineNumbers[CurrentInputIndex], (const wxChar*) currentFileName.c_str());
               OnError((wxChar *)errBuf.c_str());

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

    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)
            getc(Inputs[CurrentInputIndex]);
          buf[bufIndex] = 0;
          IncrementLineNumber();
//          wxStrcat(buf, "\\par\n");
//          i += 6;
          if (bufIndex+5 >= MAX_LINE_BUFFER_SIZE)
          {
             wxString errBuf;
             errBuf.Printf(_T("Line %lu of file %s is too long.  Lines can be no longer than %lu characters.  Truncated."),
                 LineNumbers[CurrentInputIndex], (const wxChar*) currentFileName.c_str(),MAX_LINE_BUFFER_SIZE);
             OnError((wxChar *)errBuf.c_str());
             return false;
          }
          wxStrcat(buf, _T("\\par"));
          bufIndex += 5;

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

          buf[bufIndex] = (wxChar)ch;
          bufIndex ++;
        }
      }
      else
      {

        // Convert embedded characters to RTF equivalents
        switch(ch)
        {
        case 0xf6: //