TB9.2 Example Applications: examples/PIPS/antiword/src/fontlist.c Source File

00001 /*
-00002  * fontlist.c
-00003  * Copyright (C) 1998-2004 A.J. van Os; Released under GNU GPL
-00004  *
-00005  * Description:
-00006  * Build, read and destroy a list of Word font information
-00007  */
-00008 
-00009 #include <stdlib.h>
-00010 #include <stddef.h>
-00011 #include "antiword.h"
-00012 
-00013 
-00014 /*
-00015  * Private structure to hide the way the information
-00016  * is stored from the rest of the program
-00017  */
-00018 typedef struct font_desc_tag {
-00019         font_block_type tInfo;
-00020         struct font_desc_tag    *pNext;
-00021 } font_mem_type;
-00022 
-00023 /* Variables needed to write the Font Information List */
-00024 static font_mem_type    *pAnchor = NULL;
-00025 static font_mem_type    *pFontLast = NULL;
-00026 
-00027 
-00028 /*
-00029  * vDestroyFontInfoList - destroy the Font Information List
-00030  */
-00031 void
-00032 vDestroyFontInfoList(void)
-00033 {
-00034         font_mem_type   *pCurr, *pNext;
-00035 
-00036         DBG_MSG("vDestroyFontInfoList");
-00037 
-00038         /* Free the Font Information List */
-00039         pCurr = pAnchor;
-00040         while (pCurr != NULL) {
-00041                 pNext = pCurr->pNext;
-00042                 pCurr = xfree(pCurr);
-00043                 pCurr = pNext;
-00044         }
-00045         pAnchor = NULL;
-00046         /* Reset all control variables */
-00047         pFontLast = NULL;
-00048 } /* end of vDestroyFontInfoList */
-00049 
-00050 /*
-00051  * vCorrectFontValues - correct font values to values Antiword can use
-00052  */
-00053 void
-00054 vCorrectFontValues(font_block_type *pFontBlock)
-00055 {
-00056         UINT    uiRealSize;
-00057         USHORT  usRealStyle;
-00058 
-00059         uiRealSize = pFontBlock->usFontSize;
-00060         usRealStyle = pFontBlock->usFontStyle;
-00061         if (bIsSmallCapitals(pFontBlock->usFontStyle)) {
-00062                 /* Small capitals become normal capitals in a smaller font */
-00063                 uiRealSize = (uiRealSize * 4 + 2) / 5;
-00064                 usRealStyle &= ~FONT_SMALL_CAPITALS;
-00065                 usRealStyle |= FONT_CAPITALS;
-00066         }
-00067         if (bIsSuperscript(pFontBlock->usFontStyle) ||
-00068             bIsSubscript(pFontBlock->usFontStyle)) {
-00069                 /* Superscript and subscript use a smaller fontsize */
-00070                 uiRealSize = (uiRealSize * 2 + 1) / 3;
-00071         }
-00072 
-00073         if (uiRealSize < MIN_FONT_SIZE) {
-00074                 DBG_DEC(uiRealSize);
-00075                 uiRealSize = MIN_FONT_SIZE;
-00076         } else if (uiRealSize > MAX_FONT_SIZE) {
-00077                 DBG_DEC(uiRealSize);
-00078                 uiRealSize = MAX_FONT_SIZE;
-00079         }
-00080 
-00081         pFontBlock->usFontSize = (USHORT)uiRealSize;
-00082         if (pFontBlock->ucFontColor == 8) {
-00083                 /* White text to light gray text */
-00084                 pFontBlock->ucFontColor = 16;
-00085         }
-00086         pFontBlock->usFontStyle = usRealStyle;
-00087 } /* end of vCorrectFontValues */
-00088 
-00089 /*
-00090  * vAdd2FontInfoList - Add an element to the Font Information List
-00091  */
-00092 void
-00093 vAdd2FontInfoList(const font_block_type *pFontBlock)
-00094 {
-00095         font_mem_type   *pListMember;
-00096 
-00097         fail(pFontBlock == NULL);
-00098 
-00099         NO_DBG_MSG("bAdd2FontInfoList");
-00100 
-00101         if (pFontBlock->ulFileOffset == FC_INVALID) {
-00102                 /*
-00103                  * This offset is really past the end of the file,
-00104                  * so don't waste any memory by storing it.
-00105                  */
-00106                 return;
-00107         }
-00108 
-00109         NO_DBG_HEX(pFontBlock->ulFileOffset);
-00110         NO_DBG_DEC_C(pFontBlock->ucFontNumber != 0,
-00111                                         pFontBlock->ucFontNumber);
-00112         NO_DBG_DEC_C(pFontBlock->usFontSize != DEFAULT_FONT_SIZE,
-00113                                         pFontBlock->usFontSize);
-00114         NO_DBG_DEC_C(pFontBlock->ucFontColor != 0,
-00115                                         pFontBlock->ucFontColor);
-00116         NO_DBG_HEX_C(pFontBlock->usFontStyle != 0x00,
-00117                                         pFontBlock->usFontStyle);
-00118 
-00119         if (pFontLast != NULL &&
-00120             pFontLast->tInfo.ulFileOffset == pFontBlock->ulFileOffset) {
-00121                 /*
-00122                  * If two consecutive fonts share the same
-00123                  * offset, remember only the last font
-00124                  */
-00125                 fail(pFontLast->pNext != NULL);
-00126                 pFontLast->tInfo = *pFontBlock;
-00127                 return;
-00128         }
-00129 
-00130         /* Create list member */
-00131         pListMember = xmalloc(sizeof(font_mem_type));
-00132         /* Fill the list member */
-00133         pListMember->tInfo = *pFontBlock;
-00134         pListMember->pNext = NULL;
-00135         /* Correct the values where needed */
-00136         vCorrectFontValues(&pListMember->tInfo);
-00137         /* Add the new member to the list */
-00138         if (pAnchor == NULL) {
-00139                 pAnchor = pListMember;
-00140         } else {
-00141                 fail(pFontLast == NULL);
-00142                 pFontLast->pNext = pListMember;
-00143         }
-00144         pFontLast = pListMember;
-00145 } /* end of vAdd2FontInfoList */
-00146 
-00147 /*
-00148  * Get the record that follows the given recored in the Font Information List
-00149  */
-00150 const font_block_type *
-00151 pGetNextFontInfoListItem(const font_block_type *pCurr)
-00152 {
-00153         const font_mem_type     *pRecord;
-00154         size_t  tOffset;
-00155 
-00156         if (pCurr == NULL) {
-00157                 if (pAnchor == NULL) {
-00158                         /* There are no records */
-00159                         return NULL;
-00160                 }
-00161                 /* The first record is the only one without a predecessor */
-00162                 return &pAnchor->tInfo;
-00163         }
-00164         tOffset = offsetof(font_mem_type, tInfo);
-00165         /* Many casts to prevent alignment warnings */
-00166         pRecord = (font_mem_type *)(void *)((char *)pCurr - tOffset);
-00167         fail(pCurr != &pRecord->tInfo);
-00168         if (pRecord->pNext == NULL) {
-00169                 /* The last record has no successor */
-00170                 return NULL;
-00171         }
-00172         return &pRecord->pNext->tInfo;
-00173 } /* end of pGetNextFontInfoListItem */
-