src/cache-loader.c

   1 /*
   2  * GQview
   3  * (C) 2005 John Ellis
   4  *
   5  * Author: John Ellis
   6  *
   7  * This software is released under the GNU General Public License (GNU GPL).
   8  * Please read the included file COPYING for more information.
   9  * This software comes with no warranty of any kind, use at your own risk!
  10  */
  11
  12 #include "gqview.h"
  13 #include "cache-loader.h"
  14
  15 #include "exif.h"
  16 #include "md5-util.h"
  17 #include "ui_fileops.h"
  18
  19
  20 static gboolean cache_loader_process(CacheLoader *cl);
  21
  22
  23 static void cache_loader_done_cb(ImageLoader *il, gpointer data)
  24 {
  25         CacheLoader *cl = data;
  26
  27         cache_loader_process(cl);
  28 }
  29
  30 static void cache_loader_error_cb(ImageLoader *il, gpointer data)
  31 {
  32         CacheLoader *cl = data;
  33
  34         cl->error = TRUE;
  35         cache_loader_done_cb(il, data);
  36 }
  37
  38 static gboolean cache_loader_process(CacheLoader *cl)
  39 {
  40         if (cl->todo_mask & CACHE_LOADER_SIMILARITY &&
  41             !cl->cd->similarity)
  42                 {
  43                 GdkPixbuf *pixbuf;
  44
  45                 if (!cl->il && !cl->error)
  46                         {
  47                         cl->il = image_loader_new(cl->path);
  48                         image_loader_set_error_func(cl->il, cache_loader_error_cb, cl);
  49                         if (image_loader_start(cl->il, cache_loader_done_cb, cl))
  50                                 {
  51                                 return FALSE;
  52                                 }
  53
  54                         cl->error = TRUE;
  55                         }
  56
  57                 pixbuf = image_loader_get_pixbuf(cl->il);
  58                 if (pixbuf)
  59                         {
  60                         if (!cl->error)
  61                                 {
  62                                 ImageSimilarityData *sim;
  63
  64                                 sim = image_sim_new_from_pixbuf(pixbuf);
  65                                 cache_sim_data_set_similarity(cl->cd, sim);
  66                                 image_sim_free(sim);
  67
  68                                 cl->done_mask |= CACHE_LOADER_SIMILARITY;
  69                                 }
  70
  71                         /* we have the dimensions via pixbuf */
  72                         if (!cl->cd->dimensions)
  73                                 {
  74                                 cache_sim_data_set_dimensions(cl->cd, gdk_pixbuf_get_width(pixbuf),
  75                                                                       gdk_pixbuf_get_height(pixbuf));
  76                                 if (cl->todo_mask & CACHE_LOADER_DIMENSIONS)
  77                                         {
  78                                         cl->todo_mask &= ~CACHE_LOADER_DIMENSIONS;
  79                                         cl->done_mask |= CACHE_LOADER_DIMENSIONS;
  80                                         }
  81                                 }
  82                         }
  83
  84                 image_loader_free(cl->il);
  85                 cl->il = NULL;
  86
  87                 cl->todo_mask &= ~CACHE_LOADER_SIMILARITY;
  88                 }
  89         else if (cl->todo_mask & CACHE_LOADER_DIMENSIONS &&
  90                  !cl->cd->dimensions)
  91                 {
  92                 if (!cl->error &&
  93                     image_load_dimensions(cl->path, &cl->cd->width, &cl->cd->height))
  94                         {
  95                         cl->cd->dimensions = TRUE;
  96                         cl->done_mask |= CACHE_LOADER_DIMENSIONS;
  97                         }
  98                 else
  99                         {
 100                         cl->error = TRUE;
 101                         }
 102
 103                 cl->todo_mask &= ~CACHE_LOADER_DIMENSIONS;
 104                 }
 105         else if (cl->todo_mask & CACHE_LOADER_MD5SUM &&
 106                  !cl->cd->have_md5sum)
 107                 {
 108                 if (md5_get_digest_from_file_utf8(cl->path, cl->cd->md5sum))
 109                         {
 110                         cl->cd->have_md5sum = TRUE;
 111                         cl->done_mask |= CACHE_LOADER_MD5SUM;
 112                         }
 113                 else
 114                         {
 115                         cl->error = TRUE;
 116                         }
 117
 118                 cl->todo_mask &= ~CACHE_LOADER_MD5SUM;
 119                 }
 120         else if (cl->todo_mask & CACHE_LOADER_DATE &&
 121                  !cl->cd->have_date)
 122                 {
 123                 time_t date = -1;
 124                 ExifData *exif;
 125
 126                 exif = exif_read(cl->path, FALSE);
 127                 if (exif)
 128                         {
 129                         gchar *text;
 130
 131                         text = exif_get_data_as_text(exif, "fDateTime");
 132                         if (text)
 133                                 {
 134                                 struct tm t = { 0 };
 135
 136                                 if (sscanf(text, "%d:%d:%d %d:%d:%d", &t.tm_year, &t.tm_mon, &t.tm_mday,
 137                                            &t.tm_hour, &t.tm_min, &t.tm_sec) == 6)
 138                                         {
 139                                         t.tm_year -= 1900;
 140                                         t.tm_mon -= 1;
 141                                         t.tm_isdst = -1;
 142                                         date = mktime(&t);
 143                                         }
 144                                 g_free(text);
 145                                 }
 146                         exif_free(exif);
 147                         }
 148
 149                 cl->cd->date = date;
 150                 cl->cd->have_date = TRUE;
 151
 152                 cl->done_mask |= CACHE_LOADER_DATE;
 153                 cl->todo_mask &= ~CACHE_LOADER_DATE;
 154                 }
 155         else
 156                 {
 157                 /* done, save then call done function */
 158                 if (enable_thumb_caching &&
 159                     cl->done_mask != CACHE_LOADER_NONE)
 160                         {
 161                         gchar *base;
 162                         mode_t mode = 0755;
 163
 164                         base = cache_get_location(CACHE_TYPE_SIM, cl->path, FALSE, &mode);
 165                         if (cache_ensure_dir_exists(base, mode))
 166                                 {
 167                                 g_free(cl->cd->path);
 168                                 cl->cd->path = cache_get_location(CACHE_TYPE_SIM, cl->path, TRUE, NULL);
 169                                 if (cache_sim_data_save(cl->cd))
 170                                         {
 171                                         filetime_set(cl->cd->path, filetime(cl->path));
 172                                         }
 173                                 }
 174                         g_free(base);
 175                         }
 176
 177                 cl->idle_id = -1;
 178
 179                 if (cl->done_func)
 180                         {
 181                         cl->done_func(cl, cl->error, cl->done_data);
 182                         }
 183
 184                 return FALSE;
 185                 }
 186
 187         return TRUE;
 188 }
 189
 190 static gboolean cache_loader_idle_cb(gpointer data)
 191 {
 192         CacheLoader *cl = data;
 193
 194         return cache_loader_process(cl);
 195 }
 196
 197 CacheLoader *cache_loader_new(const gchar *path, CacheDataType load_mask,
 198                               CacheLoaderDoneFunc done_func, gpointer done_data)
 199 {
 200         CacheLoader *cl;
 201         gchar *found;
 202
 203         if (!path || !isfile(path)) return NULL;
 204
 205         cl = g_new0(CacheLoader, 1);
 206         cl->path = g_strdup(path);
 207
 208         cl->done_func = done_func;
 209         cl->done_data = done_data;
 210
 211         found = cache_find_location(CACHE_TYPE_SIM, path);
 212         if (found && filetime(found) == filetime(path))
 213                 {
 214                 cl->cd = cache_sim_data_load(found);
 215                 }
 216         g_free(found);
 217
 218         if (!cl->cd) cl->cd = cache_sim_data_new();
 219
 220         cl->todo_mask = load_mask;
 221         cl->done_mask = CACHE_LOADER_NONE;
 222
 223         cl->il = NULL;
 224         cl->idle_id = g_idle_add(cache_loader_idle_cb, cl);
 225
 226         cl->error = FALSE;
 227
 228         return cl;
 229 }
 230
 231 void cache_loader_free(CacheLoader *cl)
 232 {
 233         if (!cl) return;
 234
 235         if (cl->idle_id != -1)
 236                 {
 237                 g_source_remove(cl->idle_id);
 238                 cl->idle_id = -1;
 239                 }
 240
 241         image_loader_free(cl->il);
 242         cache_sim_data_free(cl->cd);
 243
 244         g_free(cl->path);
 245         g_free(cl);
 246 }
 247