src/thumb_standard.c

   1 /*
   2  * Geeqie
   3  * (C) 2006 John Ellis
   4  * Copyright (C) 2008 - 2009 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "thumb_standard.h"
  16
  17 #include "image-load.h"
  18 #include "md5-util.h"
  19 #include "pixbuf_util.h"
  20 #include "ui_fileops.h"
  21 #include "filedata.h"
  22 #include "exif.h"
  23 #include "metadata.h"
  24
  25
  26 /*
  27  * This thumbnail caching implementation attempts to conform
  28  * to the Thumbnail Managing Standard proposed on freedesktop.org
  29  * The standard is documented here:
  30  *   http://triq.net/~jens/thumbnail-spec/index.html
  31  *  (why isn't it actually hosted on freedesktop.org?)
  32  *
  33  * This code attempts to conform to version 0.7.0 of the standard.
  34  *
  35  * Notes:
  36  *   > Validation of the thumb's embedded uri is a simple strcmp between our
  37  *     version of the escaped uri and the thumb's escaped uri. But not all uri
  38  *     escape functions escape the same set of chars, comparing the unescaped
  39  *     versions may be more accurate.
  40  *   > Only Thumb::URI and Thumb::MTime are stored in a thumb at this time.
  41  *     Storing the Size, Width, Height should probably be implemented.
  42  */
  43
  44
  45 #define THUMB_SIZE_NORMAL 128
  46 #define THUMB_SIZE_LARGE  256
  47
  48 #define THUMB_MARKER_URI    "tEXt::Thumb::URI"
  49 #define THUMB_MARKER_MTIME  "tEXt::Thumb::MTime"
  50 #define THUMB_MARKER_SIZE   "tEXt::Thumb::Size"
  51 #define THUMB_MARKER_WIDTH  "tEXt::Thumb::Image::Width"
  52 #define THUMB_MARKER_HEIGHT "tEXt::Thumb::Image::Height"
  53 #define THUMB_MARKER_APP    "tEXt::Software"
  54
  55 #define THUMB_PERMS_FOLDER 0700
  56 #define THUMB_PERMS_THUMB  0600
  57
  58
  59
  60 /*
  61  *-----------------------------------------------------------------------------
  62  * thumbnail loader
  63  *-----------------------------------------------------------------------------
  64  */
  65
  66
  67 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data);
  68 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, FileData *fd);
  69 static gint thumb_loader_std_setup_path(ThumbLoaderStd *tl, const gchar *path);
  70
  71
  72 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  73 {
  74         ThumbLoaderStd *tl;
  75
  76         tl = g_new0(ThumbLoaderStd, 1);
  77
  78         tl->standard_loader = TRUE;
  79
  80         tl->requested_width = width;
  81         tl->requested_height = height;
  82
  83         tl->il = NULL;
  84         tl->fd = NULL;
  85
  86         tl->cache_enable = options->thumbnails.enable_caching;
  87         tl->cache_local = FALSE;
  88         tl->cache_retry = FALSE;
  89
  90         return tl;
  91 }
  92
  93 void thumb_loader_std_set_callbacks(ThumbLoaderStd *tl,
  94                                     ThumbLoaderStdFunc func_done,
  95                                     ThumbLoaderStdFunc func_error,
  96                                     ThumbLoaderStdFunc func_progress,
  97                                     gpointer data)
  98 {
  99         if (!tl) return;
 100
 101         tl->func_done = func_done;
 102         tl->func_error = func_error;
 103         tl->func_progress = func_progress;
 104         tl->data = data;
 105 }
 106
 107 static void thumb_loader_std_reset(ThumbLoaderStd *tl)
 108 {
 109         image_loader_free(tl->il);
 110         tl->il = NULL;
 111
 112         file_data_unref(tl->fd);
 113         tl->fd = 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 *md5_text;
 138         guchar digest[16];
 139         gchar *name;
 140
 141         if (!path || !uri || !cache_subfolder) return NULL;
 142
 143         md5_get_digest((guchar *)uri, strlen(uri), digest);
 144         md5_text = md5_digest_to_text(digest);
 145
 146         if (!md5_text) return NULL;
 147
 148         name = g_strconcat(md5_text, THUMB_NAME_EXTENSION, NULL);
 149
 150         if (local)
 151                 {
 152                 gchar *base = remove_level_from_path(path);
 153
 154                 result = g_build_filename(base, THUMB_FOLDER_LOCAL, cache_subfolder, name, NULL);
 155                 g_free(base);
 156                 }
 157         else
 158                 {
 159                 result = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, cache_subfolder, name, NULL);
 160                 }
 161
 162         g_free(name);
 163         g_free(md5_text);
 164
 165         return result;
 166 }
 167
 168 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gint local, GdkPixbuf *pixbuf, gint fail)
 169 {
 170         const gchar *folder;
 171         gint w, h;
 172
 173         if (!tl->fd || !tl->thumb_uri) return NULL;
 174
 175         if (pixbuf)
 176                 {
 177                 w = gdk_pixbuf_get_width(pixbuf);
 178                 h = gdk_pixbuf_get_height(pixbuf);
 179                 }
 180         else
 181                 {
 182                 w = tl->requested_width;
 183                 h = tl->requested_height;
 184                 }
 185
 186         if (fail)
 187                 {
 188                 folder = THUMB_FOLDER_FAIL;
 189                 }
 190         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 191                 {
 192                 folder = THUMB_FOLDER_LARGE;
 193                 }
 194         else
 195                 {
 196                 folder = THUMB_FOLDER_NORMAL;
 197                 }
 198
 199         return thumb_std_cache_path(tl->fd->path,
 200                                     (local) ?  tl->local_uri : tl->thumb_uri,
 201                                     local, folder);
 202 }
 203
 204 static gint thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 205 {
 206         gchar *fail_path;
 207         gint result = FALSE;
 208
 209         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 210         if (isfile(fail_path))
 211                 {
 212                 GdkPixbuf *pixbuf;
 213
 214                 if (tl->cache_retry)
 215                         {
 216                         pixbuf = NULL;
 217                         }
 218                 else
 219                         {
 220                         gchar *pathl;
 221
 222                         pathl = path_from_utf8(fail_path);
 223                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 224                         g_free(pathl);
 225                         }
 226
 227                 if (pixbuf)
 228                         {
 229                         const gchar *mtime_str;
 230
 231                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 232                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 233                                 {
 234                                 result = TRUE;
 235                                 DEBUG_1("thumb fail valid: %s", tl->fd->path);
 236                                 DEBUG_1("           thumb: %s", fail_path);
 237                                 }
 238
 239                         g_object_unref(G_OBJECT(pixbuf));
 240                         }
 241
 242                 if (!result) unlink_file(fail_path);
 243                 }
 244         g_free(fail_path);
 245
 246         return result;
 247 }
 248
 249 static gint thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 250 {
 251         const gchar *valid_uri;
 252         const gchar *uri;
 253         const gchar *mtime_str;
 254         time_t mtime;
 255         gint w, h;
 256
 257         if (!pixbuf) return FALSE;
 258
 259         w = gdk_pixbuf_get_width(pixbuf);
 260         h = gdk_pixbuf_get_height(pixbuf);
 261
 262         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 263             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 264
 265         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 266
 267         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 268         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 269
 270         if (!mtime_str || !uri || !valid_uri) return FALSE;
 271         if (strcmp(uri, valid_uri) != 0) return FALSE;
 272
 273         mtime = strtol(mtime_str, NULL, 10);
 274         if (tl->source_mtime != mtime) return FALSE;
 275
 276         return TRUE;
 277 }
 278
 279 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 280 {
 281         gchar *base_path;
 282         gchar *tmp_path;
 283         gint fail;
 284
 285         if (!tl->cache_enable || tl->cache_hit) return;
 286         if (tl->thumb_path) return;
 287
 288         if (!pixbuf)
 289                 {
 290                 /* local failures are not stored */
 291                 if (tl->cache_local) return;
 292
 293                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 294                 fail = TRUE;
 295                 }
 296         else
 297                 {
 298                 g_object_ref(G_OBJECT(pixbuf));
 299                 fail = FALSE;
 300                 }
 301
 302         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 303         if (!tl->thumb_path)
 304                 {
 305                 g_object_unref(G_OBJECT(pixbuf));
 306                 return;
 307                 }
 308         tl->thumb_path_local = tl->cache_local;
 309
 310         /* create thumbnail dir if needed */
 311         base_path = remove_level_from_path(tl->thumb_path);
 312         if (tl->cache_local)
 313                 {
 314                 if (!isdir(base_path))
 315                         {
 316                         struct stat st;
 317                         gchar *source_base;
 318
 319                         source_base = remove_level_from_path(tl->fd->path);
 320                         if (stat_utf8(source_base, &st))
 321                                 {
 322                                 recursive_mkdir_if_not_exists(base_path, st.st_mode);
 323                                 }
 324                         g_free(source_base);
 325                         }
 326                 }
 327         else
 328                 {
 329                 recursive_mkdir_if_not_exists(base_path, THUMB_PERMS_FOLDER);
 330                 }
 331         g_free(base_path);
 332
 333         DEBUG_1("thumb saving: %s", tl->fd->path);
 334         DEBUG_1("       saved: %s", tl->thumb_path);
 335
 336         /* save thumb, using a temp file then renaming into place */
 337         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 338         if (tmp_path)
 339                 {
 340                 const gchar *mark_uri;
 341                 gchar *mark_app;
 342                 gchar *mark_mtime;
 343                 gchar *pathl;
 344                 gint success;
 345
 346                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 347
 348                 mark_app = g_strdup_printf("%s %s", GQ_APPNAME, VERSION);
 349                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 350
 351                 pathl = path_from_utf8(tmp_path);
 352                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 353                                           THUMB_MARKER_URI, mark_uri,
 354                                           THUMB_MARKER_MTIME, mark_mtime,
 355                                           THUMB_MARKER_APP, mark_app,
 356                                           NULL);
 357                 if (success)
 358                         {
 359                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 360                         success = rename_file(tmp_path, tl->thumb_path);
 361                         }
 362
 363                 g_free(pathl);
 364
 365                 g_free(mark_mtime);
 366                 g_free(mark_app);
 367
 368                 g_free(tmp_path);
 369                 if (!success)
 370                         {
 371                         DEBUG_1("thumb save failed: %s", tl->fd->path);
 372                         DEBUG_1("            thumb: %s", tl->thumb_path);
 373                         }
 374
 375                 }
 376
 377         g_object_unref(G_OBJECT(pixbuf));
 378 }
 379
 380 static void thumb_loader_std_set_fallback(ThumbLoaderStd *tl)
 381 {
 382         if (tl->fd->thumb_pixbuf) g_object_unref(tl->fd->thumb_pixbuf);
 383         tl->fd->thumb_pixbuf = pixbuf_fallback(tl->fd, tl->requested_width, tl->requested_height);
 384 }
 385
 386 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf, gint shrunk)
 387 {
 388         GdkPixbuf *pixbuf_thumb = NULL;
 389         GdkPixbuf *result;
 390         GdkPixbuf *rotated = NULL;
 391         gint sw, sh;
 392
 393
 394         if (!tl->cache_hit && options->image.exif_rotate_enable)
 395                 {
 396                 if (!tl->fd->exif_orientation)
 397                         {
 398                         tl->fd->exif_orientation = metadata_read_int(tl->fd, "Exif.Image.Orientation", EXIF_ORIENTATION_TOP_LEFT);
 399                         }
 400
 401                 if (tl->fd->exif_orientation != EXIF_ORIENTATION_TOP_LEFT)
 402                         {
 403                         rotated = pixbuf_apply_orientation(pixbuf, tl->fd->exif_orientation);
 404                         pixbuf = rotated;
 405                         }
 406                 }
 407
 408         sw = gdk_pixbuf_get_width(pixbuf);
 409         sh = gdk_pixbuf_get_height(pixbuf);
 410
 411         if (tl->cache_enable)
 412                 {
 413                 if (!tl->cache_hit)
 414                         {
 415                         gint cache_w, cache_h;
 416
 417                         if (tl->requested_width > THUMB_SIZE_NORMAL || tl->requested_height > THUMB_SIZE_NORMAL)
 418                                 {
 419                                 cache_w = cache_h = THUMB_SIZE_LARGE;
 420                                 }
 421                         else
 422                                 {
 423                                 cache_w = cache_h = THUMB_SIZE_NORMAL;
 424                                 }
 425
 426                         if (sw > cache_w || sh > cache_h || shrunk)
 427                                 {
 428                                 gint thumb_w, thumb_h;
 429
 430                                 if (pixbuf_scale_aspect(cache_w, cache_h, sw, sh,
 431                                                                   &thumb_w, &thumb_h))
 432                                         {
 433                                         pixbuf_thumb = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 434                                                                                (GdkInterpType)options->thumbnails.quality);
 435                                         }
 436                                 else
 437                                         {
 438                                         pixbuf_thumb = pixbuf;
 439                                         g_object_ref(G_OBJECT(pixbuf_thumb));
 440                                         }
 441
 442                                 thumb_loader_std_save(tl, pixbuf_thumb);
 443                                 }
 444                         }
 445                 else if (tl->cache_hit &&
 446                          tl->cache_local && !tl->thumb_path_local)
 447                         {
 448                         /* A local cache save was requested, but a valid thumb is in $HOME,
 449                          * so specifically save as a local thumbnail.
 450                          */
 451                         g_free(tl->thumb_path);
 452                         tl->thumb_path = NULL;
 453
 454                         tl->cache_hit = FALSE;
 455
 456                         DEBUG_1("thumb copied: %s", tl->fd->path);
 457
 458                         thumb_loader_std_save(tl, pixbuf);
 459                         }
 460                 }
 461
 462         if (sw <= tl->requested_width && sh <= tl->requested_height)
 463                 {
 464                 result = pixbuf;
 465                 g_object_ref(result);
 466                 }
 467         else
 468                 {
 469                 gint thumb_w, thumb_h;
 470
 471                 if (pixbuf_thumb)
 472                         {
 473                         pixbuf = pixbuf_thumb;
 474                         sw = gdk_pixbuf_get_width(pixbuf);
 475                         sh = gdk_pixbuf_get_height(pixbuf);
 476                         }
 477
 478                 if (pixbuf_scale_aspect(tl->requested_width, tl->requested_height, sw, sh,
 479                                                   &thumb_w, &thumb_h))
 480                         {
 481                         result = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 482                                                          (GdkInterpType)options->thumbnails.quality);
 483                         }
 484                 else
 485                         {
 486                         result = pixbuf;
 487                         g_object_ref(result);
 488                         }
 489                 }
 490
 491         if (pixbuf_thumb) g_object_unref(pixbuf_thumb);
 492         if (rotated) g_object_unref(rotated);
 493
 494         return result;
 495 }
 496
 497 static gint thumb_loader_std_next_source(ThumbLoaderStd *tl, gint remove_broken)
 498 {
 499         image_loader_free(tl->il);
 500         tl->il = NULL;
 501
 502         if (tl->thumb_path)
 503                 {
 504                 if (!tl->thumb_path_local && remove_broken)
 505                         {
 506                         DEBUG_1("thumb broken, unlinking: %s", tl->thumb_path);
 507                         unlink_file(tl->thumb_path);
 508                         }
 509
 510                 g_free(tl->thumb_path);
 511                 tl->thumb_path = NULL;
 512
 513                 if (!tl->thumb_path_local)
 514                         {
 515                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 516                         if (isfile(tl->thumb_path) && thumb_loader_std_setup_path(tl, tl->thumb_path))
 517                                 {
 518                                 tl->thumb_path_local = TRUE;
 519                                 return TRUE;
 520                                 }
 521
 522                         g_free(tl->thumb_path);
 523                         tl->thumb_path = NULL;
 524                         }
 525
 526                 if (thumb_loader_std_setup(tl, tl->fd)) return TRUE;
 527                 }
 528
 529         thumb_loader_std_save(tl, NULL);
 530         return FALSE;
 531 }
 532
 533 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 534 {
 535         ThumbLoaderStd *tl = data;
 536         GdkPixbuf *pixbuf;
 537
 538         DEBUG_1("thumb image done: %s", tl->fd ? tl->fd->path : "???");
 539         DEBUG_1("            from: %s", image_loader_get_fd(tl->il)->path);
 540
 541         pixbuf = image_loader_get_pixbuf(tl->il);
 542         if (!pixbuf)
 543                 {
 544                 DEBUG_1("...but no pixbuf");
 545                 thumb_loader_std_error_cb(il, data);
 546                 return;
 547                 }
 548
 549         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 550                 {
 551                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 552
 553                 if (tl->func_error) tl->func_error(tl, tl->data);
 554                 return;
 555                 }
 556
 557         tl->cache_hit = (tl->thumb_path != NULL);
 558
 559         if (tl->fd)
 560                 {
 561                 if (tl->fd->thumb_pixbuf) g_object_unref(tl->fd->thumb_pixbuf);
 562                 tl->fd->thumb_pixbuf = thumb_loader_std_finish(tl, pixbuf, image_loader_get_shrunk(il));
 563                 }
 564
 565         if (tl->func_done) tl->func_done(tl, tl->data);
 566 }
 567
 568 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 569 {
 570         ThumbLoaderStd *tl = data;
 571
 572         /* if at least some of the image is available, go to done */
 573         if (image_loader_get_pixbuf(tl->il) != NULL)
 574                 {
 575                 thumb_loader_std_done_cb(il, data);
 576                 return;
 577                 }
 578
 579         DEBUG_1("thumb image error: %s", tl->fd->path);
 580         DEBUG_1("             from: %s", image_loader_get_fd(tl->il)->path);
 581
 582         if (thumb_loader_std_next_source(tl, TRUE)) return;
 583
 584         thumb_loader_std_set_fallback(tl);
 585
 586         if (tl->func_error) tl->func_error(tl, tl->data);
 587 }
 588
 589 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 590 {
 591         ThumbLoaderStd *tl = data;
 592
 593         tl->progress = (gdouble)percent;
 594
 595         if (tl->func_progress) tl->func_progress(tl, tl->data);
 596 }
 597
 598 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, FileData *fd)
 599 {
 600         tl->il = image_loader_new(fd);
 601         image_loader_set_priority(tl->il, G_PRIORITY_LOW);
 602
 603         if (options->thumbnails.fast)
 604                 {
 605                 /* this will speed up jpegs by up to 3x in some cases */
 606                 if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 607                     tl->requested_height <= THUMB_SIZE_NORMAL)
 608                         {
 609                         image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 610                         }
 611                 else
 612                         {
 613                         image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 614                         }
 615                 }
 616
 617         g_signal_connect(G_OBJECT(tl->il), "error", (GCallback)thumb_loader_std_error_cb, tl);
 618         if (tl->func_progress)
 619                 {
 620                 g_signal_connect(G_OBJECT(tl->il), "percent", (GCallback)thumb_loader_std_progress_cb, tl);
 621                 }
 622         g_signal_connect(G_OBJECT(tl->il), "done", (GCallback)thumb_loader_std_done_cb, tl);
 623
 624         if (image_loader_start(tl->il))
 625                 {
 626                 return TRUE;
 627                 }
 628
 629         image_loader_free(tl->il);
 630         tl->il = NULL;
 631         return FALSE;
 632 }
 633
 634 static gint thumb_loader_std_setup_path(ThumbLoaderStd *tl, const gchar *path)
 635 {
 636         FileData *fd = file_data_new_simple(path);
 637         gint ret = thumb_loader_std_setup(tl, fd);
 638         file_data_unref(fd);
 639         return ret;
 640 }
 641
 642 /*
 643  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 644  *       a valid existing thumb is found anywhere the local thumb will not be created.
 645  */
 646 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gint enable_cache, gint local, gint retry_failed)
 647 {
 648         if (!tl) return;
 649
 650         tl->cache_enable = enable_cache;
 651         tl->cache_local = local;
 652         tl->cache_retry = retry_failed;
 653 }
 654
 655 gint thumb_loader_std_start(ThumbLoaderStd *tl, FileData *fd)
 656 {
 657         static gchar *thumb_cache = NULL;
 658         struct stat st;
 659
 660         if (!tl || !fd) return FALSE;
 661
 662         thumb_loader_std_reset(tl);
 663
 664
 665         tl->fd = file_data_ref(fd);
 666         if (!stat_utf8(fd->path, &st))
 667                 {
 668                 thumb_loader_std_set_fallback(tl);
 669                 return FALSE;
 670                 }
 671         tl->source_mtime = st.st_mtime;
 672         tl->source_size = st.st_size;
 673         tl->source_mode = st.st_mode;
 674
 675         if (!thumb_cache) thumb_cache = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, NULL);
 676         if (strncmp(tl->fd->path, thumb_cache, strlen(thumb_cache)) != 0)
 677                 {
 678                 gchar *pathl;
 679
 680                 pathl = path_from_utf8(fd->path);
 681                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 682                 tl->local_uri = filename_from_path(tl->thumb_uri);
 683                 g_free(pathl);
 684                 }
 685
 686         if (tl->cache_enable)
 687                 {
 688                 gint found;
 689
 690                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 691                 tl->thumb_path_local = FALSE;
 692
 693                 found = isfile(tl->thumb_path);
 694                 if (found && thumb_loader_std_setup_path(tl, tl->thumb_path)) return TRUE;
 695
 696                 if (thumb_loader_std_fail_check(tl) ||
 697                     !thumb_loader_std_next_source(tl, found))
 698                         {
 699                         thumb_loader_std_set_fallback(tl);
 700                         return FALSE;
 701                         }
 702                 return TRUE;
 703                 }
 704
 705         if (!thumb_loader_std_setup(tl, tl->fd))
 706                 {
 707                 thumb_loader_std_save(tl, NULL);
 708                 thumb_loader_std_set_fallback(tl);
 709                 return FALSE;
 710                 }
 711
 712         return TRUE;
 713 }
 714
 715 void thumb_loader_std_free(ThumbLoaderStd *tl)
 716 {
 717         if (!tl) return;
 718
 719         thumb_loader_std_reset(tl);
 720         g_free(tl);
 721 }
 722
 723 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl)
 724 {
 725         GdkPixbuf *pixbuf;
 726
 727         if (tl && tl->fd && tl->fd->thumb_pixbuf)
 728                 {
 729                 pixbuf = tl->fd->thumb_pixbuf;
 730                 g_object_ref(pixbuf);
 731                 }
 732         else
 733                 {
 734                 pixbuf = pixbuf_fallback(NULL, tl->requested_width, tl->requested_height);
 735                 }
 736
 737         return pixbuf;
 738 }
 739
 740
 741 typedef struct _ThumbValidate ThumbValidate;
 742 struct _ThumbValidate
 743 {
 744         ThumbLoaderStd *tl;
 745         gchar *path;
 746         gint days;
 747
 748         void (*func_valid)(const gchar *path, gint valid, gpointer data);
 749         gpointer data;
 750
 751         gint idle_id;
 752 };
 753
 754 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 755 {
 756         thumb_loader_std_free(tv->tl);
 757         g_free(tv->path);
 758         g_free(tv);
 759 }
 760
 761 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 762 {
 763         ThumbValidate *tv;
 764
 765         if (!tl) return;
 766
 767         tv = tl->data;
 768
 769         if (tv->idle_id != -1) g_source_remove(tv->idle_id);
 770         tv->idle_id = -1;
 771
 772         thumb_loader_std_thumb_file_validate_free(tv);
 773 }
 774
 775 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gint valid)
 776 {
 777         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 778
 779         thumb_loader_std_thumb_file_validate_free(tv);
 780 }
 781
 782 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 783 {
 784         ThumbValidate *tv = data;
 785         GdkPixbuf *pixbuf;
 786         gint valid = FALSE;
 787
 788         /* this function is called on success, so the pixbuf should not be a fallback*/
 789         pixbuf = thumb_loader_std_get_pixbuf(tv->tl);
 790         if (pixbuf)
 791                 {
 792                 const gchar *uri;
 793                 const gchar *mtime_str;
 794
 795                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 796                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 797                 if (uri && mtime_str)
 798                         {
 799                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 800                                 {
 801                                 struct stat st;
 802                                 gchar *target;
 803
 804                                 target = g_filename_from_uri(uri, NULL, NULL);
 805                                 if (stat(target, &st) == 0 &&
 806                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 807                                         {
 808                                         valid = TRUE;
 809                                         }
 810                                 g_free(target);
 811                                 }
 812                         else
 813                                 {
 814                                 struct stat st;
 815
 816                                 DEBUG_1("thumb uri foreign, doing day check: %s", uri);
 817
 818                                 if (stat_utf8(tv->path, &st))
 819                                         {
 820                                         time_t now;
 821
 822                                         now = time(NULL);
 823                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 824                                                 {
 825                                                 valid = TRUE;
 826                                                 }
 827                                         }
 828                                 }
 829                         }
 830
 831                 g_object_unref(pixbuf);
 832                 }
 833
 834         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 835 }
 836
 837 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 838 {
 839         ThumbValidate *tv = data;
 840
 841         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 842 }
 843
 844 static gint thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 845 {
 846         ThumbValidate *tv = data;
 847
 848         tv->idle_id = -1;
 849         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 850
 851         return FALSE;
 852 }
 853
 854 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 855                                                      void (*func_valid)(const gchar *path, gint valid, gpointer data),
 856                                                      gpointer data)
 857 {
 858         ThumbValidate *tv;
 859
 860         tv = g_new0(ThumbValidate, 1);
 861
 862         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 863         thumb_loader_std_set_callbacks(tv->tl,
 864                                        thumb_loader_std_thumb_file_validate_done_cb,
 865                                        thumb_loader_std_thumb_file_validate_error_cb,
 866                                        NULL,
 867                                        tv);
 868         thumb_loader_std_reset(tv->tl);
 869
 870         tv->path = g_strdup(thumb_path);
 871         tv->days = allowed_days;
 872         tv->func_valid = func_valid;
 873         tv->data = data;
 874
 875         if (!thumb_loader_std_setup_path(tv->tl, thumb_path))
 876                 {
 877                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 878                 }
 879         else
 880                 {
 881                 tv->idle_id = -1;
 882                 }
 883
 884         return tv->tl;
 885 }
 886
 887 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gint local,
 888                                        const gchar *subfolder)
 889 {
 890         gchar *thumb_path;
 891
 892         thumb_path = thumb_std_cache_path(source,
 893                                           (local) ? filename_from_path(uri) : uri,
 894                                           local, subfolder);
 895         if (isfile(thumb_path))
 896                 {
 897                 DEBUG_1("thumb removing: %s", thumb_path);
 898                 unlink_file(thumb_path);
 899                 }
 900         g_free(thumb_path);
 901 }
 902
 903 /* this also removes local thumbnails (the source is gone so it makes sense) */
 904 void thumb_std_maint_removed(const gchar *source)
 905 {
 906         gchar *uri;
 907         gchar *sourcel;
 908
 909         sourcel = path_from_utf8(source);
 910         uri = g_filename_to_uri(sourcel, NULL, NULL);
 911         g_free(sourcel);
 912
 913         /* all this to remove a thumbnail? */
 914
 915         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 916         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 917         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 918         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 919         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 920
 921         g_free(uri);
 922 }
 923
 924 typedef struct _TMaintMove TMaintMove;
 925 struct _TMaintMove
 926 {
 927         gchar *source;
 928         gchar *dest;
 929
 930         ThumbLoaderStd *tl;
 931         gchar *source_uri;
 932         gchar *thumb_path;
 933
 934         gint pass;
 935 };
 936
 937 static GList *thumb_std_maint_move_list = NULL;
 938 static GList *thumb_std_maint_move_tail = NULL;
 939
 940
 941 static void thumb_std_maint_move_step(TMaintMove *tm);
 942 static gint thumb_std_maint_move_idle(gpointer data);
 943
 944
 945 static void thumb_std_maint_move_validate_cb(const gchar *path, gint valid, gpointer data)
 946 {
 947         TMaintMove *tm = data;
 948         GdkPixbuf *pixbuf;
 949
 950         /* this function is called on success, so the pixbuf should not be a fallback*/
 951         pixbuf = thumb_loader_std_get_pixbuf(tm->tl);
 952         if (pixbuf)
 953                 {
 954                 const gchar *uri;
 955                 const gchar *mtime_str;
 956
 957                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 958                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 959
 960                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 961                         {
 962                         gchar *pathl;
 963
 964                         /* The validation utility abuses ThumbLoader, and we
 965                          * abuse the utility just to load the thumbnail,
 966                          * but the loader needs to look sane for the save to complete.
 967                          */
 968
 969                         tm->tl->cache_enable = TRUE;
 970                         tm->tl->cache_hit = FALSE;
 971                         tm->tl->cache_local = FALSE;
 972
 973                         file_data_unref(tm->tl->fd);
 974                         tm->tl->fd = file_data_new_simple(tm->dest);
 975                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
 976
 977                         pathl = path_from_utf8(tm->tl->fd->path);
 978                         g_free(tm->tl->thumb_uri);
 979                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 980                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
 981                         g_free(pathl);
 982
 983                         g_free(tm->tl->thumb_path);
 984                         tm->tl->thumb_path = NULL;
 985                         tm->tl->thumb_path_local = FALSE;
 986
 987                         DEBUG_1("thumb move attempting save:");
 988
 989                         thumb_loader_std_save(tm->tl, pixbuf);
 990                         }
 991
 992                 DEBUG_1("thumb move unlink: %s", tm->thumb_path);
 993                 unlink_file(tm->thumb_path);
 994                 g_object_unref(pixbuf);
 995                 }
 996
 997         thumb_std_maint_move_step(tm);
 998 }
 999
1000 static void thumb_std_maint_move_step(TMaintMove *tm)
1001 {
1002         const gchar *folder;
1003
1004         tm->pass++;
1005         if (tm->pass > 2)
1006                 {
1007                 g_free(tm->source);
1008                 g_free(tm->dest);
1009                 g_free(tm->source_uri);
1010                 g_free(tm->thumb_path);
1011                 g_free(tm);
1012
1013                 if (thumb_std_maint_move_list)
1014                         {
1015                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1016                         }
1017
1018                 return;
1019                 }
1020
1021         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1022
1023         g_free(tm->thumb_path);
1024         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1025         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1026                                                       thumb_std_maint_move_validate_cb, tm);
1027 }
1028
1029 static gint thumb_std_maint_move_idle(gpointer data)
1030 {
1031         TMaintMove *tm;
1032         gchar *pathl;
1033
1034         if (!thumb_std_maint_move_list) return FALSE;
1035
1036         tm = thumb_std_maint_move_list->data;
1037
1038         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1039         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1040
1041         pathl = path_from_utf8(tm->source);
1042         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1043         g_free(pathl);
1044
1045         tm->pass = 0;
1046
1047         thumb_std_maint_move_step(tm);
1048
1049         return FALSE;
1050 }
1051
1052 /* This will schedule a move of the thumbnail for source image to dest when idle.
1053  * We do this so that file renaming or moving speed is not sacrificed by
1054  * moving the thumbnails at the same time because:
1055  *
1056  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1057  *
1058  * The thumbnails are processed when the app is idle. If the app
1059  * exits early well too bad - they can simply be regenerated from scratch.
1060  *
1061  * This does not manage local thumbnails (fixme ?)
1062  */
1063 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1064 {
1065         TMaintMove *tm;
1066
1067         tm = g_new0(TMaintMove, 1);
1068         tm->source = g_strdup(source);
1069         tm->dest = g_strdup(dest);
1070
1071         if (!thumb_std_maint_move_list)
1072                 {
1073                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1074                 }
1075
1076         if (thumb_std_maint_move_tail)
1077                 {
1078                 thumb_std_maint_move_tail = g_list_append(thumb_std_maint_move_tail, tm);
1079                 thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1080                 }
1081         else
1082                 {
1083                 thumb_std_maint_move_list = g_list_append(thumb_std_maint_move_list, tm);
1084                 thumb_std_maint_move_tail = thumb_std_maint_move_list;
1085                 }
1086 }
1087 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */