stylelist.c

   1 /*
   2  * stylelist.c
   3  * Copyright (C) 1998,1999 A.J. van Os
   4  *
   5  * Description:
   6  * Build, read and destroy a list of Word style information
   7  */
   8
   9 #include <stdlib.h>
  10 #include <ctype.h>
  11 #include "antiword.h"
  12
  13
  14 /* Variables needed to write the Style Information List */
  15 static style_desc_type  *pAnchor = NULL;
  16 static style_desc_type  *pStyleLast = NULL;
  17 /* Variable needed to read the Style Information List */
  18 static style_desc_type  *pStyleCurrent = NULL;
  19
  20
  21 /*
  22  * vDestroyStyleInfoList - destroy the Style Information List
  23  */
  24 void
  25 vDestroyStyleInfoList(void)
  26 {
  27         style_desc_type *pCurr, *pNext;
  28
  29         DBG_MSG("vDestroyStyleInfoList");
  30
  31         /* Free the Style Information List */
  32         pCurr = pAnchor;
  33         while (pCurr != NULL) {
  34                 pNext = pCurr->pNext;
  35                 pCurr = xfree(pCurr);
  36                 pCurr = pNext;
  37         }
  38         pAnchor = NULL;
  39         /* Reset all control variables */
  40         pStyleLast = NULL;
  41         pStyleCurrent = NULL;
  42 } /* end of vDestroyStyleInfoList */
  43
  44 /*
  45  * ucChooseListCharacter - choose our list character
  46  */
  47 static unsigned char
  48 ucChooseListCharacter(unsigned char ucListType, unsigned char ucListChar)
  49 {
  50         if (isprint(ucListChar)) {
  51                 return ucListChar;
  52         }
  53         if (ucListType == LIST_BULLETS) {
  54                 switch (ucListChar) {
  55                 case 0xa8:
  56                         return OUR_DIAMOND;
  57                 case 0xb7:
  58                         return OUR_BULLET;
  59                 case 0xde:
  60                         return '=';
  61                 case 0xe0:
  62                         return 'o';
  63                 case 0xfe:
  64                         return ' ';
  65                 default:
  66                         DBG_HEX(ucListChar);
  67                         return OUR_BULLET;
  68                 }
  69         }
  70         return '.';
  71 } /* end of ucChooseListCharacter */
  72
  73 /*
  74  * vAdd2StyleInfoList - Add an element to the Style Information List
  75  */
  76 void
  77 vAdd2StyleInfoList(const style_block_type *pStyleBlock)
  78 {
  79         static BOOL     bMustStore = FALSE;
  80         style_desc_type *pListMember;
  81
  82         fail(pStyleBlock == NULL);
  83         fail(pStyleBlock->iOffset < -1);
  84
  85         NO_DBG_MSG("bAdd2StyleInfoList");
  86
  87         if (pStyleBlock->iOffset < 0) {
  88                 return;
  89         }
  90
  91         switch (pStyleBlock->ucStyle) {
  92         case 1: case 2: case 3:
  93         case 4: case 5: case 6:
  94         case 7: case 8: case 9:
  95                 /* These styles are the nine header levels */
  96                 break;
  97         default:
  98                 if (pStyleBlock->sLeftIndent > 0 ||
  99                     pStyleBlock->ucAlignment != 0x00 ||
 100                     bMustStore) {
 101                         break;
 102                 }
 103                 /*
 104                  * When reached here, the information is not useful to
 105                  * the current implementation, so we save memory by
 106                  * not storing them.
 107                  */
 108                 return;
 109         }
 110
 111         NO_DBG_HEX(pStyleBlock->iOffset);
 112         NO_DBG_DEC_C(pStyleBlock->sLeftIndent != 0,
 113                 pStyleBlock->sLeftIndent);
 114         NO_DBG_DEC_C(pStyleBlock->sRightIndent != 0,
 115                 pStyleBlock->sRightIndent);
 116         NO_DBG_DEC_C(pStyleBlock->bInList, pStyleBlock->bInList);
 117         NO_DBG_DEC_C(pStyleBlock->bUnmarked, pStyleBlock->bUnmarked);
 118         NO_DBG_DEC_C(pStyleBlock->ucStyle != 0, pStyleBlock->ucStyle);
 119         NO_DBG_DEC_C(pStyleBlock->ucAlignment != 0, pStyleBlock->ucAlignment);
 120         NO_DBG_DEC_C(pStyleBlock->bInList, pStyleBlock->ucListType);
 121         NO_DBG_HEX_C(pStyleBlock->bInList, pStyleBlock->ucListCharacter);
 122
 123         /*
 124          * Always store the information about the paragraph
 125          * following a member of a list.
 126          */
 127         bMustStore = pStyleBlock->bInList;
 128
 129         if (pStyleLast != NULL &&
 130             pStyleLast->tInfo.iOffset == pStyleBlock->iOffset) {
 131                 /*
 132                  * If two consecutive styles share the same
 133                  * offset, remember only the last style
 134                  */
 135                 fail(pStyleLast->pNext != NULL);
 136                 pStyleLast->tInfo = *pStyleBlock;
 137                 return;
 138         }
 139
 140         /* Create list member */
 141         pListMember = xmalloc(sizeof(style_desc_type));
 142         /* Fill the list member */
 143         pListMember->tInfo = *pStyleBlock;
 144         pListMember->pNext = NULL;
 145         /* Correct the values where needed */
 146         if (pListMember->tInfo.sLeftIndent < 0) {
 147                 pListMember->tInfo.sLeftIndent = 0;
 148         }
 149         if (pListMember->tInfo.ucListLevel > 8) {
 150                 pListMember->tInfo.ucListLevel = 8;
 151         }
 152         pListMember->tInfo.ucListCharacter =
 153                 ucChooseListCharacter(pListMember->tInfo.ucListType,
 154                                 pListMember->tInfo.ucListCharacter);
 155         /* Add the new member to the list */
 156         if (pAnchor == NULL) {
 157                 pAnchor = pListMember;
 158                 pStyleCurrent = pListMember;
 159         } else {
 160                 fail(pStyleLast == NULL);
 161                 pStyleLast->pNext = pListMember;
 162         }
 163         pStyleLast = pListMember;
 164 } /* end of vAdd2StyleInfoList */
 165
 166 /*
 167  * Get the next item in the Style Information List
 168  */
 169 const style_block_type *
 170 pGetNextStyleInfoListItem(void)
 171 {
 172         const style_block_type  *pItem;
 173
 174         if (pStyleCurrent == NULL) {
 175                 return NULL;
 176         }
 177         pItem = &pStyleCurrent->tInfo;
 178         pStyleCurrent = pStyleCurrent->pNext;
 179         return pItem;
 180 } /* end of pGetNextStyleInfoListItem */