1 /* 2 ****************************************************************************** 3 * 2016 and later: Unicode, Inc. and others. * 4 * License & terms of use: http://www.unicode.org/copyright.html#License * 5 ****************************************************************************** 6 ****************************************************************************** 7 * Copyright (C) 1998-2006, International Business Machines Corporation and * 8 * others. All Rights Reserved. * 9 ****************************************************************************** 10 */ 11 12 #include <stdio.h> 13 #include <string.h> 14 #include <ctype.h> 15 16 #include "unicode/utypes.h" 17 #include "unicode/uscript.h" 18 19 #include "layout/LETypes.h" 20 #include "layout/LEScripts.h" 21 #include "layout/LEFontInstance.h" 22 23 #include "GUISupport.h" 24 #include "FontMap.h" 25 26 FontMap::FontMap(const char *fileName, le_int16 pointSize, GUISupport *guiSupport, LEErrorCode &status) 27 : fPointSize(pointSize), fFontCount(0), fAscent(0), fDescent(0), fLeading(0), fGUISupport(guiSupport) 28 { 29 le_int32 defaultFont = -1, i, script; 30 le_bool haveFonts = FALSE; 31 32 /**/ 33 for (i = 0; i < scriptCodeCount; i += 1) { 34 fFontIndices[i] = -1; 35 fFontNames[i] = NULL; 36 fFontInstances[i] = NULL; 37 } 38 /**/ 39 40 if (LE_FAILURE(status)) { 41 return; 42 } 43 44 char *c, *scriptName, *fontName, *line, buffer[BUFFER_SIZE]; 45 FILE *file; 46 47 file = fopen(fileName, "r"); 48 49 if (file == NULL) { 50 sprintf(errorMessage, "Could not open the font map file: %s.", fileName); 51 fGUISupport->postErrorMessage(errorMessage, "Font Map Error"); 52 status = LE_FONT_FILE_NOT_FOUND_ERROR; 53 return; 54 } 55 56 while (fgets(buffer, BUFFER_SIZE, file) != NULL) { 57 UScriptCode scriptCode; 58 UErrorCode scriptStatus = U_ZERO_ERROR; 59 60 line = strip(buffer); 61 if (line[0] == '#' || line[0] == 0) { 62 continue; 63 } 64 65 c = strchr(line, ':'); 66 c[0] = 0; 67 68 fontName = strip(&c[1]); 69 scriptName = strip(line); 70 71 if (strcmp(scriptName, "DEFAULT") == 0) { 72 defaultFont = getFontIndex(fontName); 73 haveFonts = TRUE; 74 continue; 75 } 76 77 le_int32 fillCount = uscript_getCode(scriptName, &scriptCode, 1, &scriptStatus); 78 79 if (U_FAILURE(scriptStatus) || fillCount <= 0 || 80 scriptStatus == U_USING_FALLBACK_WARNING || scriptStatus == U_USING_DEFAULT_WARNING) { 81 sprintf(errorMessage, "The script name %s is invalid.", line); 82 fGUISupport->postErrorMessage(errorMessage, "Font Map Error"); 83 continue; 84 } 85 86 script = (le_int32) scriptCode; 87 88 if (fFontIndices[script] >= 0) { 89 // FIXME: complain that this is a duplicate entry and bail (?) 90 fFontIndices[script] = -1; 91 } 92 93 fFontIndices[script] = getFontIndex(fontName); 94 haveFonts = TRUE; 95 } 96 97 if (defaultFont >= 0) { 98 for (script = 0; script < scriptCodeCount; script += 1) { 99 if (fFontIndices[script] < 0) { 100 fFontIndices[script] = defaultFont; 101 } 102 } 103 } 104 105 if (! haveFonts) { 106 sprintf(errorMessage, "The font map file %s does not contain any valid scripts.", fileName); 107 fGUISupport->postErrorMessage(errorMessage, "Font Map Error"); 108 status = LE_ILLEGAL_ARGUMENT_ERROR; 109 } 110 111 fclose(file); 112 } 113 114 FontMap::~FontMap() 115 { 116 le_int32 font; 117 118 for (font = 0; font < fFontCount; font += 1) { 119 if (fFontNames[font] != NULL) { 120 delete[] (char *) fFontNames[font]; 121 } 122 } 123 124 for (font = 0; font < fFontCount; font += 1) { 125 if (fFontInstances[font] != NULL) { 126 delete fFontInstances[font]; 127 } 128 } 129 } 130 131 le_int32 FontMap::getFontIndex(const char *fontName) 132 { 133 le_int32 index; 134 135 for (index = 0; index < fFontCount; index += 1) { 136 if (strcmp(fontName, fFontNames[index]) == 0) { 137 return index; 138 } 139 } 140 141 if (fFontCount < (le_int32) scriptCodeCount) { 142 index = fFontCount++; 143 } else { 144 // The font name table is full. Since there can 145 // only be scriptCodeCount fonts in use at once, 146 // there should be at least one that's not being 147 // referenced; find it and resue it's index. 148 149 for (index = 0; index < fFontCount; index += 1) { 150 le_int32 script; 151 152 for (script = 0; script < scriptCodeCount; script += 1) { 153 if (fFontIndices[script] == index) { 154 break; 155 } 156 } 157 158 if (script >= scriptCodeCount) { 159 break; 160 } 161 } 162 } 163 164 if (index >= scriptCodeCount) { 165 return -1; 166 } 167 168 le_int32 len = strlen(fontName); 169 char *s = new char[len + 1]; 170 171 fFontNames[index] = strcpy(s, fontName); 172 return index; 173 } 174 175 char *FontMap::strip(char *s) 176 { 177 le_int32 start, end, len; 178 179 start = 0; 180 len = strlen(s); 181 182 while (start < len && isspace(s[start])) { 183 start += 1; 184 } 185 186 end = len - 1; 187 188 while (end > start && isspace(s[end])) { 189 end -= 1; 190 } 191 192 if (end < len) { 193 s[end + 1] = '\0'; 194 } 195 196 return &s[start]; 197 } 198 199 const LEFontInstance *FontMap::getScriptFont(le_int32 scriptCode, LEErrorCode &status) 200 { 201 if (LE_FAILURE(status)) { 202 return NULL; 203 } 204 205 if (scriptCode <= -1 || scriptCode >= scriptCodeCount) { 206 status = LE_ILLEGAL_ARGUMENT_ERROR; 207 return NULL; 208 } 209 210 211 le_int32 fontIndex = fFontIndices[scriptCode]; 212 213 if (fontIndex < 0) { 214 sprintf(errorMessage, "No font was set for script %s", uscript_getName((UScriptCode) scriptCode)); 215 fGUISupport->postErrorMessage(errorMessage, "Font Map Error"); 216 status = LE_FONT_FILE_NOT_FOUND_ERROR; 217 return NULL; 218 } 219 220 if (fFontInstances[fontIndex] == NULL) { 221 fFontInstances[fontIndex] = openFont(fFontNames[fontIndex], fPointSize, status); 222 223 if (LE_FAILURE(status)) { 224 sprintf(errorMessage, "Could not open font file %s", fFontNames[fontIndex]); 225 fGUISupport->postErrorMessage(errorMessage, "Font Map Error"); 226 return NULL; 227 } 228 } 229 230 return fFontInstances[fontIndex]; 231 } 232 233 le_int32 FontMap::getAscent() const 234 { 235 if (fAscent <= 0) { 236 ((FontMap *) this)->getMaxMetrics(); 237 } 238 239 return fAscent; 240 } 241 242 le_int32 FontMap::getDescent() const 243 { 244 if (fDescent <= 0) { 245 ((FontMap *) this)->getMaxMetrics(); 246 } 247 248 return fDescent; 249 } 250 251 le_int32 FontMap::getLeading() const 252 { 253 if (fLeading <= 0) { 254 ((FontMap *) this)->getMaxMetrics(); 255 } 256 257 return fLeading; 258 } 259 260 void FontMap::getMaxMetrics() 261 { 262 for (le_int32 i = 0; i < fFontCount; i += 1) { 263 LEErrorCode status = LE_NO_ERROR; 264 le_int32 ascent, descent, leading; 265 266 if (fFontInstances[i] == NULL) { 267 fFontInstances[i] = openFont(fFontNames[i], fPointSize, status); 268 269 if (LE_FAILURE(status)) { 270 continue; 271 } 272 } 273 274 ascent = fFontInstances[i]->getAscent(); 275 descent = fFontInstances[i]->getDescent(); 276 leading = fFontInstances[i]->getLeading(); 277 278 if (ascent > fAscent) { 279 fAscent = ascent; 280 } 281 282 if (descent > fDescent) { 283 fDescent = descent; 284 } 285 286 if (leading > fLeading) { 287 fLeading = leading; 288 } 289 } 290 } 291 292
