fmt_text.c

   1 /*
   2  * fmt_text.c
   3  * Copyright (C) 2004 A.J. van Os; Released under GNU GPL
   4  *
   5  * Description:
   6  * Functions to deal with the Formatted Text format
   7  *
   8  * Based on patches send by: Ofir Reichenberg <ofir@qlusters.com>
   9  *
  10  * The credit should go to him, but all the bugs are mine.
  11  */
  12
  13 #include <string.h>
  14 #include "antiword.h"
  15
  16 /* The character set */
  17 static encoding_type    eEncoding = encoding_neutral;
  18 /* Current vertical position information */
  19 static long             lYtopCurr = 0;
  20 /* Local representation of the non-breaking space */
  21 static UCHAR            ucNbsp = 0;
  22
  23
  24 /*
  25  * vPrologueFMT - set options and perform the Formatted Text initialization
  26  */
  27 void
  28 vPrologueFMT(diagram_type *pDiag, const options_type *pOptions)
  29 {
  30         fail(pDiag == NULL);
  31         fail(pOptions == NULL);
  32
  33         eEncoding = pOptions->eEncoding;
  34         pDiag->lXleft = 0;
  35         pDiag->lYtop = 0;
  36         lYtopCurr = 0;
  37 } /* end of vPrologueFMT */
  38
  39 /*
  40  * vPrintFMT - print a Formatted Text string
  41  */
  42 static void
  43 vPrintFMT(FILE *pFile,
  44         const char *szString, size_t tStringLength, USHORT usFontstyle)
  45 {
  46         const UCHAR     *pucByte, *pucStart, *pucLast, *pucNonSpace;
  47
  48         fail(szString == NULL);
  49
  50         if (szString == NULL || szString[0] == '\0' || tStringLength == 0) {
  51                 return;
  52         }
  53
  54         if (eEncoding == encoding_utf_8) {
  55                 fprintf(pFile, "%.*s", (int)tStringLength, szString);
  56                 return;
  57         }
  58
  59         if (ucNbsp == 0) {
  60                 ucNbsp = ucGetNbspCharacter();
  61                 DBG_HEX_C(ucNbsp != 0xa0, ucNbsp);
  62         }
  63
  64         pucStart = (UCHAR *)szString;
  65         pucLast = pucStart + tStringLength - 1;
  66         pucNonSpace = pucLast;
  67         while ((*pucNonSpace == (UCHAR)' ' || *pucNonSpace == ucNbsp) &&
  68                pucNonSpace > pucStart) {
  69                 pucNonSpace--;
  70         }
  71
  72         /* 1: The spaces at the start */
  73         pucByte = pucStart;
  74         while ((*pucByte == (UCHAR)' ' || *pucByte == ucNbsp) &&
  75                pucByte <= pucLast) {
  76                 (void)putc(' ', pFile);
  77                 pucByte++;
  78         }
  79
  80         if (pucByte > pucLast) {
  81                 /* There is no text, just spaces */
  82                 return;
  83         }
  84
  85         /* 2: Start the *bold*, /italic/ and _underline_ */
  86         if (bIsBold(usFontstyle)) {
  87                 (void)putc('*', pFile);
  88         }
  89         if (bIsItalic(usFontstyle)) {
  90                 (void)putc('/', pFile);
  91         }
  92         if (bIsUnderline(usFontstyle)) {
  93                 (void)putc('_', pFile);
  94         }
  95
  96         /* 3: The text itself */
  97         while (pucByte <= pucNonSpace) {
  98                 if (*pucByte == ucNbsp) {
  99                         (void)putc(' ', pFile);
 100                 } else {
 101                         (void)putc((char)*pucByte, pFile);
 102                 }
 103                 pucByte++;
 104         }
 105
 106         /* 4: End the *bold*, /italic/ and _underline_ */
 107         if (bIsUnderline(usFontstyle)) {
 108                 (void)putc('_', pFile);
 109         }
 110         if (bIsItalic(usFontstyle)) {
 111                 (void)putc('/', pFile);
 112         }
 113         if (bIsBold(usFontstyle)) {
 114                 (void)putc('*', pFile);
 115         }
 116
 117         /* 5: The spaces at the end */
 118         while (pucByte <= pucLast) {
 119                 (void)putc(' ', pFile);
 120                 pucByte++;
 121         }
 122 } /* end of vPrintFMT */
 123
 124 /*
 125  * vMoveTo - move to the given X,Y coordinates
 126  *
 127  * Move the current position of the given diagram to its X,Y coordinates,
 128  * start on a new page if needed
 129  */
 130 static void
 131 vMoveTo(diagram_type *pDiag)
 132 {
 133         int     iCount, iNbr;
 134
 135         fail(pDiag == NULL);
 136         fail(pDiag->pOutFile == NULL);
 137
 138         if (pDiag->lYtop != lYtopCurr) {
 139                 iNbr = iDrawUnits2Char(pDiag->lXleft);
 140                 for (iCount = 0; iCount < iNbr; iCount++) {
 141                         (void)putc(FILLER_CHAR, pDiag->pOutFile);
 142                 }
 143                 lYtopCurr = pDiag->lYtop;
 144         }
 145 } /* end of vMoveTo */
 146
 147 /*
 148  * vSubstringFMT - print a sub string
 149  */
 150 void
 151 vSubstringFMT(diagram_type *pDiag,
 152         const char *szString, size_t tStringLength, long lStringWidth,
 153         USHORT usFontstyle)
 154 {
 155         fail(pDiag == NULL || szString == NULL);
 156         fail(pDiag->pOutFile == NULL);
 157         fail(pDiag->lXleft < 0);
 158         fail(tStringLength != strlen(szString));
 159
 160         if (szString[0] == '\0' || tStringLength == 0) {
 161                 return;
 162         }
 163
 164         vMoveTo(pDiag);
 165         vPrintFMT(pDiag->pOutFile, szString, tStringLength, usFontstyle);
 166         pDiag->lXleft += lStringWidth;
 167 } /* end of vSubstringFMT */