src/fcdir.c

   1 /*
   2  * fontconfig/src/fcdir.c
   3  *
   4  * Copyright © 2000 Keith Packard
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of the author(s) not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  The authors make no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "fcint.h"
  26 #include <dirent.h>
  27
  28 FcBool
  29 FcFileIsDir (const FcChar8 *file)
  30 {
  31     struct stat     statb;
  32
  33     if (FcStat (file, &statb) != 0)
  34         return FcFalse;
  35     return S_ISDIR(statb.st_mode);
  36 }
  37
  38 static FcBool
  39 FcFileScanFontConfig (FcFontSet         *set,
  40                       FcBlanks          *blanks,
  41                       const FcChar8     *file,
  42                       FcConfig          *config)
  43 {
  44     FcPattern   *font;
  45     FcBool      ret = FcTrue;
  46     int         id;
  47     int         count = 0;
  48
  49     id = 0;
  50     do
  51     {
  52         font = 0;
  53         /*
  54          * Nothing in the cache, scan the file
  55          */
  56         if (FcDebug () & FC_DBG_SCAN)
  57         {
  58             printf ("\tScanning file %s...", file);
  59             fflush (stdout);
  60         }
  61         font = FcFreeTypeQuery (file, id, blanks, &count);
  62         if (FcDebug () & FC_DBG_SCAN)
  63             printf ("done\n");
  64
  65         /*
  66          * Edit pattern with user-defined rules
  67          */
  68         if (font && config && !FcConfigSubstitute (config, font, FcMatchScan))
  69         {
  70             FcPatternDestroy (font);
  71             font = NULL;
  72             ret = FcFalse;
  73         }
  74
  75         /*
  76          * Add the font
  77          */
  78         if (font)
  79         {
  80             if (FcDebug() & FC_DBG_SCANV)
  81             {
  82                 printf ("Final font pattern:\n");
  83                 FcPatternPrint (font);
  84             }
  85             if (!FcFontSetAdd (set, font))
  86             {
  87                 FcPatternDestroy (font);
  88                 font = NULL;
  89                 ret = FcFalse;
  90             }
  91         }
  92         else if (font)
  93             FcPatternDestroy (font);
  94         id++;
  95     } while (font && ret && id < count);
  96     return ret;
  97 }
  98
  99 FcBool
 100 FcFileScanConfig (FcFontSet     *set,
 101                   FcStrSet      *dirs,
 102                   FcBlanks      *blanks,
 103                   const FcChar8 *file,
 104                   FcConfig      *config)
 105 {
 106     if (FcFileIsDir (file))
 107         return FcStrSetAdd (dirs, file);
 108     else
 109         return FcFileScanFontConfig (set, blanks, file, config);
 110 }
 111
 112 FcBool
 113 FcFileScan (FcFontSet       *set,
 114             FcStrSet        *dirs,
 115             FcFileCache     *cache, /* XXX unused */
 116             FcBlanks        *blanks,
 117             const FcChar8   *file,
 118             FcBool          force)
 119 {
 120     return FcFileScanConfig (set, dirs, blanks, file, FcConfigGetCurrent ());
 121 }
 122
 123 /*
 124  * Strcmp helper that takes pointers to pointers, copied from qsort(3) manpage
 125  */
 126 static int
 127 cmpstringp(const void *p1, const void *p2)
 128 {
 129     return strcmp(* (char **) p1, * (char **) p2);
 130 }
 131
 132 FcBool
 133 FcDirScanConfig (FcFontSet      *set,
 134                  FcStrSet       *dirs,
 135                  FcBlanks       *blanks,
 136                  const FcChar8  *dir,
 137                  FcBool         force, /* XXX unused */
 138                  FcConfig       *config)
 139 {
 140     DIR                 *d;
 141     struct dirent       *e;
 142     FcStrSet            *files;
 143     FcChar8             *file;
 144     FcChar8             *base;
 145     const FcChar8       *scanDir;
 146     FcChar8             *fullDir;
 147     FcBool              ret = FcTrue;
 148     int                 i;
 149
 150     if (!force)
 151         return FcFalse;
 152
 153     if (!set && !dirs)
 154         return FcTrue;
 155
 156     if (!blanks)
 157         blanks = FcConfigGetBlanks (config);
 158
 159     /* freed below */
 160     file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1);
 161     if (!file) {
 162         ret = FcFalse;
 163         goto bail;
 164     }
 165
 166     strcpy ((char *) file, (char *) dir);
 167     strcat ((char *) file, "/");
 168     base = file + strlen ((char *) file);
 169
 170     if (FcDebug () & FC_DBG_SCAN)
 171         printf ("\tScanning dir %s\n", dir);
 172
 173     fullDir = FcConfigGetRootPlus (dir);
 174     if (fullDir)
 175         scanDir = fullDir;
 176     else
 177         scanDir = dir;
 178     d = opendir ((char *) scanDir);
 179     if (fullDir)
 180         FcStrFree (fullDir);
 181     if (!d)
 182     {
 183         /* Don't complain about missing directories */
 184         if (errno != ENOENT)
 185             ret = FcFalse;
 186         goto bail;
 187     }
 188
 189     files = FcStrSetCreate ();
 190     if (!files)
 191     {
 192         ret = FcFalse;
 193         goto bail1;
 194     }
 195     while ((e = readdir (d)))
 196     {
 197         if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN)
 198         {
 199             strcpy ((char *) base, (char *) e->d_name);
 200             if (!FcStrSetAdd (files, file)) {
 201                 ret = FcFalse;
 202                 goto bail2;
 203             }
 204         }
 205     }
 206
 207     /*
 208      * Sort files to make things prettier
 209      */
 210     qsort(files->strs, files->num, sizeof(FcChar8 *), cmpstringp);
 211
 212     /*
 213      * Scan file files to build font patterns
 214      */
 215     for (i = 0; i < files->num; i++)
 216         FcFileScanConfig (set, dirs, blanks, files->strs[i], config);
 217
 218 bail2:
 219     FcStrSetDestroy (files);
 220 bail1:
 221     closedir (d);
 222 bail:
 223     return ret;
 224 }
 225
 226 FcBool
 227 FcDirScan (FcFontSet        *set,
 228            FcStrSet         *dirs,
 229            FcFileCache      *cache, /* XXX unused */
 230            FcBlanks         *blanks,
 231            const FcChar8    *dir,
 232            FcBool           force /* XXX unused */)
 233 {
 234     if (cache || !force)
 235         return FcFalse;
 236
 237     return FcDirScanConfig (set, dirs, blanks, dir, force, FcConfigGetCurrent ());
 238 }
 239
 240 /*
 241  * Scan the specified directory and construct a cache of its contents
 242  */
 243 FcCache *
 244 FcDirCacheScan (const FcChar8 *dir, FcConfig *config)
 245 {
 246     FcStrSet            *dirs;
 247     FcFontSet           *set;
 248     FcCache             *cache = NULL;
 249     struct stat         dir_stat;
 250
 251     if (FcDebug () & FC_DBG_FONTSET)
 252         printf ("cache scan dir %s\n", dir);
 253
 254     if (FcStat (dir, &dir_stat) < 0)
 255         goto bail;
 256
 257     set = FcFontSetCreate();
 258     if (!set)
 259         goto bail;
 260
 261     dirs = FcStrSetCreate ();
 262     if (!dirs)
 263         goto bail1;
 264
 265     /*
 266      * Scan the dir
 267      */
 268     if (!FcDirScanConfig (set, dirs, NULL, dir, FcTrue, config))
 269         goto bail2;
 270
 271     /*
 272      * Build the cache object
 273      */
 274     cache = FcDirCacheBuild (set, dir, &dir_stat, dirs);
 275     if (!cache)
 276         goto bail2;
 277
 278     /*
 279      * Write out the cache file, ignoring any troubles
 280      */
 281     FcDirCacheWrite (cache, config);
 282
 283  bail2:
 284     FcStrSetDestroy (dirs);
 285  bail1:
 286     FcFontSetDestroy (set);
 287  bail:
 288     return cache;
 289 }
 290
 291 /*
 292  * Read (or construct) the cache for a directory
 293  */
 294 FcCache *
 295 FcDirCacheRead (const FcChar8 *dir, FcBool force, FcConfig *config)
 296 {
 297     FcCache             *cache = NULL;
 298
 299     /* Try to use existing cache file */
 300     if (!force)
 301         cache = FcDirCacheLoad (dir, config, NULL);
 302
 303     /* Not using existing cache file, construct new cache */
 304     if (!cache)
 305         cache = FcDirCacheScan (dir, config);
 306
 307     return cache;
 308 }
 309
 310 FcBool
 311 FcDirSave (FcFontSet *set, FcStrSet * dirs, const FcChar8 *dir)
 312 {
 313     return FcFalse; /* XXX deprecated */
 314 }
 315 #define __fcdir__
 316 #include "fcaliastail.h"
 317 #undef __fcdir__