src/thumb_standard.c

   1 /*
   2  * Geeqie
   3  * (C) 2006 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
  13 #include "main.h"
  14 #include "thumb_standard.h"
  15
  16 #include "cache.h"      /* for cache_ensure_dir_exists */
  17 #include "image-load.h"
  18 #include "md5-util.h"
  19 #include "pixbuf_util.h"
  20 #include "ui_fileops.h"
  21
  22
  23 /*
  24  * This thumbnail caching implementation attempts to conform
  25  * to the Thumbnail Managing Standard proposed on freedesktop.org
  26  * The standard is documented here:
  27  *   http://triq.net/~jens/thumbnail-spec/index.html
  28  *  (why isn't it actually hosted on freedesktop.org?)
  29  *
  30  * This code attempts to conform to version 0.7.0 of the standard.
  31  *
  32  * Notes:
  33  *   > Validation of the thumb's embedded uri is a simple strcmp between our
  34  *     version of the escaped uri and the thumb's escaped uri. But not all uri
  35  *     escape functions escape the same set of chars, comparing the unescaped
  36  *     versions may be more accurate.
  37  *   > Only Thumb::URI and Thumb::MTime are stored in a thumb at this time.
  38  *     Storing the Size, Width, Height should probably be implemented.
  39  */
  40
  41
  42 #define THUMB_SIZE_NORMAL 128
  43 #define THUMB_SIZE_LARGE  256
  44
  45 #define THUMB_MARKER_URI    "tEXt::Thumb::URI"
  46 #define THUMB_MARKER_MTIME  "tEXt::Thumb::MTime"
  47 #define THUMB_MARKER_SIZE   "tEXt::Thumb::Size"
  48 #define THUMB_MARKER_WIDTH  "tEXt::Thumb::Image::Width"
  49 #define THUMB_MARKER_HEIGHT "tEXt::Thumb::Image::Height"
  50 #define THUMB_MARKER_APP    "tEXt::Software"
  51
  52 #define THUMB_PERMS_FOLDER 0700
  53 #define THUMB_PERMS_THUMB  0600
  54
  55
  56
  57 /*
  58  *-----------------------------------------------------------------------------
  59  * thumbnail loader
  60  *-----------------------------------------------------------------------------
  61  */
  62
  63
  64 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data);
  65 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path);
  66
  67
  68 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  69 {
  70         ThumbLoaderStd *tl;
  71
  72         tl = g_new0(ThumbLoaderStd, 1);
  73
  74         tl->standard_loader = TRUE;
  75
  76         tl->requested_width = width;
  77         tl->requested_height = height;
  78
  79         tl->pixbuf = NULL;
  80         tl->il = NULL;
  81         tl->source_path = NULL;
  82
  83         tl->cache_enable = options->thumbnails.enable_caching;
  84         tl->cache_local = FALSE;
  85         tl->cache_retry = FALSE;
  86
  87         return tl;
  88 }
  89
  90 void thumb_loader_std_set_callbacks(ThumbLoaderStd *tl,
  91                                     ThumbLoaderStdFunc func_done,
  92                                     ThumbLoaderStdFunc func_error,
  93                                     ThumbLoaderStdFunc func_progress,
  94                                     gpointer data)
  95 {
  96         if (!tl) return;
  97
  98         tl->func_done = func_done;
  99         tl->func_error = func_error;
 100         tl->func_progress = func_progress;
 101         tl->data = data;
 102 }
 103
 104 static void thumb_loader_std_reset(ThumbLoaderStd *tl)
 105 {
 106         if (tl->pixbuf) g_object_unref(tl->pixbuf);
 107         tl->pixbuf = NULL;
 108
 109         image_loader_free(tl->il);
 110         tl->il = NULL;
 111
 112         g_free(tl->source_path);
 113         tl->source_path = NULL;
 114
 115         g_free(tl->thumb_path);
 116         tl->thumb_path = NULL;
 117
 118         g_free(tl->thumb_uri);
 119         tl->thumb_uri = NULL;
 120         tl->local_uri = NULL;
 121
 122         tl->thumb_path_local = FALSE;
 123
 124         tl->cache_hit = FALSE;
 125
 126         tl->source_mtime = 0;
 127         tl->source_size = 0;
 128         tl->source_mode = 0;
 129
 130         tl->progress = 0.0;
 131 }
 132
 133 static gchar *thumb_std_cache_path(const gchar *path, const gchar *uri, gint local,
 134                                    const gchar *cache_subfolder)
 135 {
 136         gchar *result = NULL;
 137         gchar *cache_base;
 138         gchar *md5_text;
 139         guchar digest[16];
 140
 141         if (!path || !uri || !cache_subfolder) return NULL;
 142
 143         if (local)
 144                 {
 145                 gchar *base;
 146
 147                 base = remove_level_from_path(path);
 148                 cache_base = g_strconcat(base, "/", THUMB_FOLDER_LOCAL, "/", cache_subfolder, NULL);
 149                 g_free(base);
 150                 }
 151         else
 152                 {
 153                 cache_base = g_strconcat(homedir(), "/", THUMB_FOLDER_GLOBAL, "/", cache_subfolder, NULL);
 154                 }
 155
 156         md5_get_digest((guchar *)uri, strlen(uri), digest);
 157         md5_text = md5_digest_to_text(digest);
 158
 159         if (cache_base && md5_text)
 160                 {
 161                 result = g_strconcat(cache_base, "/", md5_text, THUMB_NAME_EXTENSION, NULL);
 162                 }
 163
 164         g_free(cache_base);
 165         g_free(md5_text);
 166
 167         return result;
 168 }
 169
 170 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gint local, GdkPixbuf *pixbuf, gint fail)
 171 {
 172         const gchar *folder;
 173         gint w, h;
 174
 175         if (!tl->source_path || !tl->thumb_uri) return NULL;
 176
 177         if (pixbuf)
 178                 {
 179                 w = gdk_pixbuf_get_width(pixbuf);
 180                 h = gdk_pixbuf_get_height(pixbuf);
 181                 }
 182         else
 183                 {
 184                 w = tl->requested_width;
 185                 h = tl->requested_height;
 186                 }
 187
 188         if (fail)
 189                 {
 190                 folder = THUMB_FOLDER_FAIL;
 191                 }
 192         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 193                 {
 194                 folder = THUMB_FOLDER_LARGE;
 195                 }
 196         else
 197                 {
 198                 folder = THUMB_FOLDER_NORMAL;
 199                 }
 200
 201         return thumb_std_cache_path(tl->source_path,
 202                                     (local) ?  tl->local_uri : tl->thumb_uri,
 203                                     local, folder);
 204 }
 205
 206 static gint thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 207 {
 208         gchar *fail_path;
 209         gint result = FALSE;
 210
 211         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 212         if (isfile(fail_path))
 213                 {
 214                 GdkPixbuf *pixbuf;
 215
 216                 if (tl->cache_retry)
 217                         {
 218                         pixbuf = NULL;
 219                         }
 220                 else
 221                         {
 222                         gchar *pathl;
 223
 224                         pathl = path_from_utf8(fail_path);
 225                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 226                         g_free(pathl);
 227                         }
 228
 229                 if (pixbuf)
 230                         {
 231                         const gchar *mtime_str;
 232
 233                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 234                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 235                                 {
 236                                 result = TRUE;
 237                                 if (debug)
 238                                         {
 239                                         printf("thumb fail valid: %s\n", tl->source_path);
 240                                         printf("           thumb: %s\n", fail_path);
 241                                         }
 242                                 }
 243
 244                         g_object_unref(G_OBJECT(pixbuf));
 245                         }
 246
 247                 if (!result) unlink_file(fail_path);
 248                 }
 249         g_free(fail_path);
 250
 251         return result;
 252 }
 253
 254 static gint thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 255 {
 256         const gchar *valid_uri;
 257         const gchar *uri;
 258         const gchar *mtime_str;
 259         time_t mtime;
 260         gint w, h;
 261
 262         if (!pixbuf) return FALSE;
 263
 264         w = gdk_pixbuf_get_width(pixbuf);
 265         h = gdk_pixbuf_get_height(pixbuf);
 266
 267         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 268             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 269
 270         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 271
 272         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 273         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 274
 275         if (!mtime_str || !uri || !valid_uri) return FALSE;
 276         if (strcmp(uri, valid_uri) != 0) return FALSE;
 277
 278         mtime = strtol(mtime_str, NULL, 10);
 279         if (tl->source_mtime != mtime) return FALSE;
 280
 281         return TRUE;
 282 }
 283
 284 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 285 {
 286         gchar *base_path;
 287         gchar *tmp_path;
 288         gint fail;
 289
 290         if (!tl->cache_enable || tl->cache_hit) return;
 291         if (tl->thumb_path) return;
 292
 293         if (!pixbuf)
 294                 {
 295                 /* local failures are not stored */
 296                 if (tl->cache_local) return;
 297
 298                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 299                 fail = TRUE;
 300                 }
 301         else
 302                 {
 303                 g_object_ref(G_OBJECT(pixbuf));
 304                 fail = FALSE;
 305                 }
 306
 307         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 308         if (!tl->thumb_path)
 309                 {
 310                 g_object_unref(G_OBJECT(pixbuf));
 311                 return;
 312                 }
 313         tl->thumb_path_local = tl->cache_local;
 314
 315         /* create thumbnail dir if needed */
 316         base_path = remove_level_from_path(tl->thumb_path);
 317         if (tl->cache_local)
 318                 {
 319                 if (!isdir(base_path))
 320                         {
 321                         struct stat st;
 322                         gchar *source_base;
 323
 324                         source_base = remove_level_from_path(tl->source_path);
 325                         if (stat_utf8(source_base, &st))
 326                                 {
 327                                 cache_ensure_dir_exists(base_path, st.st_mode);
 328                                 }
 329                         g_free(source_base);
 330                         }
 331                 }
 332         else
 333                 {
 334                 cache_ensure_dir_exists(base_path, THUMB_PERMS_FOLDER);
 335                 }
 336         g_free(base_path);
 337
 338         if (debug)
 339                 {
 340                 printf("thumb saving: %s\n", tl->source_path);
 341                 printf("       saved: %s\n", tl->thumb_path);
 342                 }
 343
 344         /* save thumb, using a temp file then renaming into place */
 345         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 346         if (tmp_path)
 347                 {
 348                 const gchar *mark_uri;
 349                 gchar *mark_app;
 350                 gchar *mark_mtime;
 351                 gchar *pathl;
 352                 gint success;
 353
 354                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 355
 356                 mark_app = g_strdup_printf("%s %s", GQ_APPNAME, VERSION);
 357                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 358
 359                 pathl = path_from_utf8(tmp_path);
 360                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 361                                           THUMB_MARKER_URI, mark_uri,
 362                                           THUMB_MARKER_MTIME, mark_mtime,
 363                                           THUMB_MARKER_APP, mark_app,
 364                                           NULL);
 365                 if (success)
 366                         {
 367                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 368                         success = rename_file(tmp_path, tl->thumb_path);
 369                         }
 370
 371                 g_free(pathl);
 372
 373                 g_free(mark_mtime);
 374                 g_free(mark_app);
 375
 376                 g_free(tmp_path);
 377                 if (!success && debug)
 378                         {
 379                         printf("thumb save failed: %s\n", tl->source_path);
 380                         printf("            thumb: %s\n", tl->thumb_path);
 381                         }
 382
 383                 }
 384
 385         g_object_unref(G_OBJECT(pixbuf));
 386 }
 387
 388 static gint thumb_loader_std_scale_aspect(gint req_w, gint req_h, gint old_w, gint old_h,
 389                                           gint *new_w, gint *new_h)
 390 {
 391         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 392                 {
 393                 *new_w = req_w;
 394                 *new_h = (gdouble)*new_w / old_w * old_h;
 395                 if (*new_h < 1) *new_h = 1;
 396                 }
 397         else
 398                 {
 399                 *new_h = req_h;
 400                 *new_w = (gdouble)*new_h / old_h * old_w;
 401                 if (*new_w < 1) *new_w = 1;
 402                 }
 403
 404         return (*new_w != old_w || *new_h != old_h);
 405 }
 406
 407 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf, gint shrunk)
 408 {
 409         GdkPixbuf *pixbuf_thumb = NULL;
 410         GdkPixbuf *result;
 411         gint sw, sh;
 412
 413         sw = gdk_pixbuf_get_width(pixbuf);
 414         sh = gdk_pixbuf_get_height(pixbuf);
 415
 416         if (tl->cache_enable)
 417                 {
 418                 if (!tl->cache_hit)
 419                         {
 420                         gint cache_w, cache_h;
 421
 422                         if (tl->requested_width > THUMB_SIZE_NORMAL || tl->requested_height > THUMB_SIZE_NORMAL)
 423                                 {
 424                                 cache_w = cache_h = THUMB_SIZE_LARGE;
 425                                 }
 426                         else
 427                                 {
 428                                 cache_w = cache_h = THUMB_SIZE_NORMAL;
 429                                 }
 430
 431                         if (sw > cache_w || sh > cache_h || shrunk)
 432                                 {
 433                                 gint thumb_w, thumb_h;
 434
 435                                 if (thumb_loader_std_scale_aspect(cache_w, cache_h, sw, sh,
 436                                                                   &thumb_w, &thumb_h))
 437                                         {
 438                                         pixbuf_thumb = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 439                                                                                (GdkInterpType)options->thumbnails.quality);
 440                                         }
 441                                 else
 442                                         {
 443                                         pixbuf_thumb = pixbuf;
 444                                         g_object_ref(G_OBJECT(pixbuf_thumb));
 445                                         }
 446
 447                                 thumb_loader_std_save(tl, pixbuf_thumb);
 448                                 }
 449                         }
 450                 else if (tl->cache_hit &&
 451                          tl->cache_local && !tl->thumb_path_local)
 452                         {
 453                         /* A local cache save was requested, but a valid thumb is in $HOME,
 454                          * so specifically save as a local thumbnail.
 455                          */
 456                         g_free(tl->thumb_path);
 457                         tl->thumb_path = NULL;
 458
 459                         tl->cache_hit = FALSE;
 460
 461                         if (debug) printf("thumb copied: %s\n", tl->source_path);
 462
 463                         thumb_loader_std_save(tl, pixbuf);
 464                         }
 465                 }
 466
 467         if (sw <= tl->requested_width && sh <= tl->requested_height)
 468                 {
 469                 result = pixbuf;
 470                 g_object_ref(result);
 471                 }
 472         else
 473                 {
 474                 gint thumb_w, thumb_h;
 475
 476                 if (pixbuf_thumb)
 477                         {
 478                         pixbuf = pixbuf_thumb;
 479                         sw = gdk_pixbuf_get_width(pixbuf);
 480                         sh = gdk_pixbuf_get_height(pixbuf);
 481                         }
 482
 483                 if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height, sw, sh,
 484                                                   &thumb_w, &thumb_h))
 485                         {
 486                         result = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 487                                                          (GdkInterpType)options->thumbnails.quality);
 488                         }
 489                 else
 490                         {
 491                         result = pixbuf;
 492                         g_object_ref(result);
 493                         }
 494                 }
 495
 496         if (pixbuf_thumb) g_object_unref(pixbuf_thumb);
 497
 498         return result;
 499 }
 500
 501 static gint thumb_loader_std_next_source(ThumbLoaderStd *tl, gint remove_broken)
 502 {
 503         image_loader_free(tl->il);
 504         tl->il = NULL;
 505
 506         if (tl->thumb_path)
 507                 {
 508                 if (!tl->thumb_path_local && remove_broken)
 509                         {
 510                         if (debug) printf("thumb broken, unlinking: %s\n", tl->thumb_path);
 511                         unlink_file(tl->thumb_path);
 512                         }
 513
 514                 g_free(tl->thumb_path);
 515                 tl->thumb_path = NULL;
 516
 517                 if (!tl->thumb_path_local)
 518                         {
 519                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 520                         if (isfile(tl->thumb_path) && thumb_loader_std_setup(tl, tl->thumb_path))
 521                                 {
 522                                 tl->thumb_path_local = TRUE;
 523                                 return TRUE;
 524                                 }
 525
 526                         g_free(tl->thumb_path);
 527                         tl->thumb_path = NULL;
 528                         }
 529
 530                 if (thumb_loader_std_setup(tl, tl->source_path)) return TRUE;
 531                 }
 532
 533         thumb_loader_std_save(tl, NULL);
 534         return FALSE;
 535 }
 536
 537 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 538 {
 539         ThumbLoaderStd *tl = data;
 540         GdkPixbuf *pixbuf;
 541
 542         if (debug)
 543                 {
 544                 printf("thumb image done: %s\n", tl->source_path);
 545                 printf("            from: %s\n", tl->il->path);
 546                 }
 547
 548         pixbuf = image_loader_get_pixbuf(tl->il);
 549         if (!pixbuf)
 550                 {
 551                 if (debug) printf("...but no pixbuf\n");
 552                 thumb_loader_std_error_cb(il, data);
 553                 return;
 554                 }
 555
 556         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 557                 {
 558                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 559
 560                 if (tl->func_error) tl->func_error(tl, tl->data);
 561                 return;
 562                 }
 563
 564         tl->cache_hit = (tl->thumb_path != NULL);
 565
 566         tl->pixbuf = thumb_loader_std_finish(tl, pixbuf, il->shrunk);
 567
 568         if (tl->func_done) tl->func_done(tl, tl->data);
 569 }
 570
 571 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 572 {
 573         ThumbLoaderStd *tl = data;
 574
 575         /* if at least some of the image is available, go to done */
 576         if (image_loader_get_pixbuf(tl->il) != NULL)
 577                 {
 578                 thumb_loader_std_done_cb(il, data);
 579                 return;
 580                 }
 581
 582         if (debug)
 583                 {
 584                 printf("thumb image error: %s\n", tl->source_path);
 585                 printf("             from: %s\n", tl->il->fd->path);
 586                 }
 587
 588         if (thumb_loader_std_next_source(tl, TRUE)) return;
 589
 590         if (tl->func_error) tl->func_error(tl, tl->data);
 591 }
 592
 593 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 594 {
 595         ThumbLoaderStd *tl = data;
 596
 597         tl->progress = (gdouble)percent;
 598
 599         if (tl->func_progress) tl->func_progress(tl, tl->data);
 600 }
 601
 602 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path)
 603 {
 604         tl->il = image_loader_new_from_path(path);
 605
 606         if (options->thumbnails.fast)
 607                 {
 608                 /* this will speed up jpegs by up to 3x in some cases */
 609                 if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 610                     tl->requested_height <= THUMB_SIZE_NORMAL)
 611                         {
 612                         image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 613                         }
 614                 else
 615                         {
 616                         image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 617                         }
 618                 }
 619
 620         image_loader_set_error_func(tl->il, thumb_loader_std_error_cb, tl);
 621         if (tl->func_progress)
 622                 {
 623                 image_loader_set_percent_func(tl->il, thumb_loader_std_progress_cb, tl);
 624                 }
 625
 626         if (image_loader_start(tl->il, thumb_loader_std_done_cb, tl))
 627                 {
 628                 return TRUE;
 629                 }
 630
 631         image_loader_free(tl->il);
 632         tl->il = NULL;
 633         return FALSE;
 634 }
 635
 636 /*
 637  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 638  *       a valid existing thumb is found anywhere the local thumb will not be created.
 639  */
 640 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gint enable_cache, gint local, gint retry_failed)
 641 {
 642         if (!tl) return;
 643
 644         tl->cache_enable = enable_cache;
 645         tl->cache_local = local;
 646         tl->cache_retry = retry_failed;
 647 }
 648
 649 gint thumb_loader_std_start(ThumbLoaderStd *tl, const gchar *path)
 650 {
 651         static gchar *thumb_cache = NULL;
 652         struct stat st;
 653
 654         if (!tl || !path) return FALSE;
 655
 656         thumb_loader_std_reset(tl);
 657
 658         if (!stat_utf8(path, &st)) return FALSE;
 659
 660         tl->source_path = g_strdup(path);
 661         tl->source_mtime = st.st_mtime;
 662         tl->source_size = st.st_size;
 663         tl->source_mode = st.st_mode;
 664
 665         if (!thumb_cache) thumb_cache = g_strconcat(homedir(), "/", THUMB_FOLDER_GLOBAL, NULL);
 666         if (strncmp(tl->source_path, thumb_cache, strlen(thumb_cache)) != 0)
 667                 {
 668                 gchar *pathl;
 669
 670                 pathl = path_from_utf8(path);
 671                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 672                 tl->local_uri = filename_from_path(tl->thumb_uri);
 673                 g_free(pathl);
 674                 }
 675
 676         if (tl->cache_enable)
 677                 {
 678                 gint found;
 679
 680                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 681                 tl->thumb_path_local = FALSE;
 682
 683                 found = isfile(tl->thumb_path);
 684                 if (found && thumb_loader_std_setup(tl, tl->thumb_path)) return TRUE;
 685
 686                 if (thumb_loader_std_fail_check(tl)) return FALSE;
 687
 688                 return thumb_loader_std_next_source(tl, found);
 689                 }
 690
 691         if (!thumb_loader_std_setup(tl, tl->source_path))
 692                 {
 693                 thumb_loader_std_save(tl, NULL);
 694                 return FALSE;
 695                 }
 696
 697         return TRUE;
 698 }
 699
 700 void thumb_loader_std_free(ThumbLoaderStd *tl)
 701 {
 702         if (!tl) return;
 703
 704         thumb_loader_std_reset(tl);
 705         g_free(tl);
 706 }
 707
 708 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl, gint with_fallback)
 709 {
 710         GdkPixbuf *pixbuf;
 711
 712         if (tl && tl->pixbuf)
 713                 {
 714                 pixbuf = tl->pixbuf;
 715                 g_object_ref(pixbuf);
 716                 }
 717         else if (with_fallback)
 718                 {
 719                 gint w, h;
 720
 721                 pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 722                 w = gdk_pixbuf_get_width(pixbuf);
 723                 h = gdk_pixbuf_get_height(pixbuf);
 724
 725                 if (w > tl->requested_width || h > tl->requested_height)
 726                         {
 727                         gint nw, nh;
 728
 729                         if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height,
 730                                                           w, h, &nw, &nh))
 731                                 {
 732                                 GdkPixbuf *tmp;
 733
 734                                 tmp = pixbuf;
 735                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 736                                 g_object_unref(G_OBJECT(tmp));
 737                                 }
 738                         }
 739                 }
 740         else
 741                 {
 742                 pixbuf = NULL;
 743                 }
 744
 745         return pixbuf;
 746 }
 747
 748
 749 typedef struct _ThumbValidate ThumbValidate;
 750 struct _ThumbValidate
 751 {
 752         ThumbLoaderStd *tl;
 753         gchar *path;
 754         gint days;
 755
 756         void (*func_valid)(const gchar *path, gint valid, gpointer data);
 757         gpointer data;
 758
 759         gint idle_id;
 760 };
 761
 762 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 763 {
 764         thumb_loader_std_free(tv->tl);
 765         g_free(tv->path);
 766         g_free(tv);
 767 }
 768
 769 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 770 {
 771         ThumbValidate *tv;
 772
 773         if (!tl) return;
 774
 775         tv = tl->data;
 776
 777         if (tv->idle_id != -1) g_source_remove(tv->idle_id);
 778         tv->idle_id = -1;
 779
 780         thumb_loader_std_thumb_file_validate_free(tv);
 781 }
 782
 783 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gint valid)
 784 {
 785         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 786
 787         thumb_loader_std_thumb_file_validate_free(tv);
 788 }
 789
 790 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 791 {
 792         ThumbValidate *tv = data;
 793         GdkPixbuf *pixbuf;
 794         gint valid = FALSE;
 795
 796         pixbuf = thumb_loader_std_get_pixbuf(tv->tl, FALSE);
 797         if (pixbuf)
 798                 {
 799                 const gchar *uri;
 800                 const gchar *mtime_str;
 801
 802                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 803                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 804                 if (uri && mtime_str)
 805                         {
 806                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 807                                 {
 808                                 struct stat st;
 809                                 gchar *target;
 810
 811                                 target = g_filename_from_uri(uri, NULL, NULL);
 812                                 if (stat(target, &st) == 0 &&
 813                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 814                                         {
 815                                         valid = TRUE;
 816                                         }
 817                                 g_free(target);
 818                                 }
 819                         else
 820                                 {
 821                                 struct stat st;
 822
 823                                 if (debug) printf("thumb uri foreign, doing day check: %s\n", uri);
 824
 825                                 if (stat_utf8(tv->path, &st))
 826                                         {
 827                                         time_t now;
 828
 829                                         now = time(NULL);
 830                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 831                                                 {
 832                                                 valid = TRUE;
 833                                                 }
 834                                         }
 835                                 }
 836                         }
 837
 838                 g_object_unref(pixbuf);
 839                 }
 840
 841         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 842 }
 843
 844 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 845 {
 846         ThumbValidate *tv = data;
 847
 848         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 849 }
 850
 851 static gint thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 852 {
 853         ThumbValidate *tv = data;
 854
 855         tv->idle_id = -1;
 856         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 857
 858         return FALSE;
 859 }
 860
 861 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 862                                                      void (*func_valid)(const gchar *path, gint valid, gpointer data),
 863                                                      gpointer data)
 864 {
 865         ThumbValidate *tv;
 866
 867         tv = g_new0(ThumbValidate, 1);
 868
 869         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 870         thumb_loader_std_set_callbacks(tv->tl,
 871                                        thumb_loader_std_thumb_file_validate_done_cb,
 872                                        thumb_loader_std_thumb_file_validate_error_cb,
 873                                        NULL,
 874                                        tv);
 875         thumb_loader_std_reset(tv->tl);
 876
 877         tv->path = g_strdup(thumb_path);
 878         tv->days = allowed_days;
 879         tv->func_valid = func_valid;
 880         tv->data = data;
 881
 882         if (!thumb_loader_std_setup(tv->tl, thumb_path))
 883                 {
 884                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 885                 }
 886         else
 887                 {
 888                 tv->idle_id = -1;
 889                 }
 890
 891         return tv->tl;
 892 }
 893
 894 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gint local,
 895                                        const gchar *subfolder)
 896 {
 897         gchar *thumb_path;
 898
 899         thumb_path = thumb_std_cache_path(source,
 900                                           (local) ? filename_from_path(uri) : uri,
 901                                           local, subfolder);
 902         if (isfile(thumb_path))
 903                 {
 904                 if (debug) printf("thumb removing: %s\n", thumb_path);
 905                 unlink_file(thumb_path);
 906                 }
 907         g_free(thumb_path);
 908 }
 909
 910 /* this also removes local thumbnails (the source is gone so it makes sense) */
 911 void thumb_std_maint_removed(const gchar *source)
 912 {
 913         gchar *uri;
 914         gchar *sourcel;
 915
 916         sourcel = path_from_utf8(source);
 917         uri = g_filename_to_uri(sourcel, NULL, NULL);
 918         g_free(sourcel);
 919
 920         /* all this to remove a thumbnail? */
 921
 922         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 923         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 924         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 925         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 926         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 927
 928         g_free(uri);
 929 }
 930
 931 typedef struct _TMaintMove TMaintMove;
 932 struct _TMaintMove
 933 {
 934         gchar *source;
 935         gchar *dest;
 936
 937         ThumbLoaderStd *tl;
 938         gchar *source_uri;
 939         gchar *thumb_path;
 940
 941         gint pass;
 942 };
 943
 944 static GList *thumb_std_maint_move_list = NULL;
 945 static GList *thumb_std_maint_move_tail = NULL;
 946
 947
 948 static void thumb_std_maint_move_step(TMaintMove *tm);
 949 static gint thumb_std_maint_move_idle(gpointer data);
 950
 951
 952 static void thumb_std_maint_move_validate_cb(const gchar *path, gint valid, gpointer data)
 953 {
 954         TMaintMove *tm = data;
 955         GdkPixbuf *pixbuf;
 956
 957         pixbuf = thumb_loader_std_get_pixbuf(tm->tl, FALSE);
 958         if (pixbuf)
 959                 {
 960                 const gchar *uri;
 961                 const gchar *mtime_str;
 962
 963                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 964                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 965
 966                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 967                         {
 968                         gchar *pathl;
 969
 970                         /* The validation utility abuses ThumbLoader, and we
 971                          * abuse the utility just to load the thumbnail,
 972                          * but the loader needs to look sane for the save to complete.
 973                          */
 974
 975                         tm->tl->cache_enable = TRUE;
 976                         tm->tl->cache_hit = FALSE;
 977                         tm->tl->cache_local = FALSE;
 978
 979                         g_free(tm->tl->source_path);
 980                         tm->tl->source_path = g_strdup(tm->dest);
 981                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
 982
 983                         pathl = path_from_utf8(tm->tl->source_path);
 984                         g_free(tm->tl->thumb_uri);
 985                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 986                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
 987                         g_free(pathl);
 988
 989                         g_free(tm->tl->thumb_path);
 990                         tm->tl->thumb_path = NULL;
 991                         tm->tl->thumb_path_local = FALSE;
 992
 993                         if (debug) printf("thumb move attempting save:\n");
 994
 995                         thumb_loader_std_save(tm->tl, pixbuf);
 996                         }
 997
 998                 if (debug) printf("thumb move unlink: %s\n", tm->thumb_path);
 999                 unlink_file(tm->thumb_path);
1000                 }
1001
1002         thumb_std_maint_move_step(tm);
1003 }
1004
1005 static void thumb_std_maint_move_step(TMaintMove *tm)
1006 {
1007         const gchar *folder;
1008
1009         tm->pass++;
1010         if (tm->pass > 2)
1011                 {
1012                 g_free(tm->source);
1013                 g_free(tm->dest);
1014                 g_free(tm->source_uri);
1015                 g_free(tm->thumb_path);
1016                 g_free(tm);
1017
1018                 if (thumb_std_maint_move_list)
1019                         {
1020                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1021                         }
1022
1023                 return;
1024                 }
1025
1026         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1027
1028         g_free(tm->thumb_path);
1029         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1030         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1031                                                       thumb_std_maint_move_validate_cb, tm);
1032 }
1033
1034 static gint thumb_std_maint_move_idle(gpointer data)
1035 {
1036         TMaintMove *tm;
1037         gchar *pathl;
1038
1039         if (!thumb_std_maint_move_list) return FALSE;
1040
1041         tm = thumb_std_maint_move_list->data;
1042
1043         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1044         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1045
1046         pathl = path_from_utf8(tm->source);
1047         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1048         g_free(pathl);
1049
1050         tm->pass = 0;
1051
1052         thumb_std_maint_move_step(tm);
1053
1054         return FALSE;
1055 }
1056
1057 /* This will schedule a move of the thumbnail for source image to dest when idle.
1058  * We do this so that file renaming or moving speed is not sacrificed by
1059  * moving the thumbnails at the same time because:
1060  *
1061  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1062  *
1063  * The thumbnails are processed when the app is idle. If the app
1064  * exits early well too bad - they can simply be regenerated from scratch.
1065  *
1066  * This does not manage local thumbnails (fixme ?)
1067  */
1068 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1069 {
1070         TMaintMove *tm;
1071
1072         tm = g_new0(TMaintMove, 1);
1073         tm->source = g_strdup(source);
1074         tm->dest = g_strdup(dest);
1075
1076         if (!thumb_std_maint_move_list)
1077                 {
1078                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1079                 }
1080
1081         if (thumb_std_maint_move_tail)
1082                 {
1083                 thumb_std_maint_move_tail = g_list_append(thumb_std_maint_move_tail, tm);
1084                 thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1085                 }
1086         else
1087                 {
1088                 thumb_std_maint_move_list = g_list_append(thumb_std_maint_move_list, tm);
1089                 thumb_std_maint_move_tail = thumb_std_maint_move_list;
1090                 }
1091 }