src/thumb_standard.c

   1 /*
   2  * Geeqie
   3  * (C) 2006 John Ellis
   4  * Copyright (C) 2008 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 "cache.h"      /* for cache_ensure_dir_exists */
  18 #include "image-load.h"
  19 #include "md5-util.h"
  20 #include "pixbuf_util.h"
  21 #include "ui_fileops.h"
  22 #include "filedata.h"
  23 #include "exif.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, const gchar *path);
  69
  70
  71 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  72 {
  73         ThumbLoaderStd *tl;
  74
  75         tl = g_new0(ThumbLoaderStd, 1);
  76
  77         tl->standard_loader = TRUE;
  78
  79         tl->requested_width = width;
  80         tl->requested_height = height;
  81
  82         tl->il = NULL;
  83         tl->fd = NULL;
  84
  85         tl->cache_enable = options->thumbnails.enable_caching;
  86         tl->cache_local = FALSE;
  87         tl->cache_retry = FALSE;
  88
  89         return tl;
  90 }
  91
  92 void thumb_loader_std_set_callbacks(ThumbLoaderStd *tl,
  93                                     ThumbLoaderStdFunc func_done,
  94                                     ThumbLoaderStdFunc func_error,
  95                                     ThumbLoaderStdFunc func_progress,
  96                                     gpointer data)
  97 {
  98         if (!tl) return;
  99
 100         tl->func_done = func_done;
 101         tl->func_error = func_error;
 102         tl->func_progress = func_progress;
 103         tl->data = data;
 104 }
 105
 106 static void thumb_loader_std_reset(ThumbLoaderStd *tl)
 107 {
 108         image_loader_free(tl->il);
 109         tl->il = NULL;
 110
 111         file_data_unref(tl->fd);
 112         tl->fd = NULL;
 113
 114         g_free(tl->thumb_path);
 115         tl->thumb_path = NULL;
 116
 117         g_free(tl->thumb_uri);
 118         tl->thumb_uri = NULL;
 119         tl->local_uri = NULL;
 120
 121         tl->thumb_path_local = FALSE;
 122
 123         tl->cache_hit = FALSE;
 124
 125         tl->source_mtime = 0;
 126         tl->source_size = 0;
 127         tl->source_mode = 0;
 128
 129         tl->progress = 0.0;
 130 }
 131
 132 static gchar *thumb_std_cache_path(const gchar *path, const gchar *uri, gint local,
 133                                    const gchar *cache_subfolder)
 134 {
 135         gchar *result = NULL;
 136         gchar *md5_text;
 137         guchar digest[16];
 138         gchar *name;
 139
 140         if (!path || !uri || !cache_subfolder) return NULL;
 141
 142         md5_get_digest((guchar *)uri, strlen(uri), digest);
 143         md5_text = md5_digest_to_text(digest);
 144
 145         if (!md5_text) return NULL;
 146
 147         name = g_strconcat(md5_text, THUMB_NAME_EXTENSION, NULL);
 148
 149         if (local)
 150                 {
 151                 gchar *base = remove_level_from_path(path);
 152
 153                 result = g_build_filename(base, THUMB_FOLDER_LOCAL, cache_subfolder, name, NULL);
 154                 g_free(base);
 155                 }
 156         else
 157                 {
 158                 result = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, cache_subfolder, name, NULL);
 159                 }
 160
 161         g_free(name);
 162         g_free(md5_text);
 163
 164         return result;
 165 }
 166
 167 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gint local, GdkPixbuf *pixbuf, gint fail)
 168 {
 169         const gchar *folder;
 170         gint w, h;
 171
 172         if (!tl->fd || !tl->thumb_uri) return NULL;
 173
 174         if (pixbuf)
 175                 {
 176                 w = gdk_pixbuf_get_width(pixbuf);
 177                 h = gdk_pixbuf_get_height(pixbuf);
 178                 }
 179         else
 180                 {
 181                 w = tl->requested_width;
 182                 h = tl->requested_height;
 183                 }
 184
 185         if (fail)
 186                 {
 187                 folder = THUMB_FOLDER_FAIL;
 188                 }
 189         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 190                 {
 191                 folder = THUMB_FOLDER_LARGE;
 192                 }
 193         else
 194                 {
 195                 folder = THUMB_FOLDER_NORMAL;
 196                 }
 197
 198         return thumb_std_cache_path(tl->fd->path,
 199                                     (local) ?  tl->local_uri : tl->thumb_uri,
 200                                     local, folder);
 201 }
 202
 203 static gint thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 204 {
 205         gchar *fail_path;
 206         gint result = FALSE;
 207
 208         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 209         if (isfile(fail_path))
 210                 {
 211                 GdkPixbuf *pixbuf;
 212
 213                 if (tl->cache_retry)
 214                         {
 215                         pixbuf = NULL;
 216                         }
 217                 else
 218                         {
 219                         gchar *pathl;
 220
 221                         pathl = path_from_utf8(fail_path);
 222                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 223                         g_free(pathl);
 224                         }
 225
 226                 if (pixbuf)
 227                         {
 228                         const gchar *mtime_str;
 229
 230                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 231                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 232                                 {
 233                                 result = TRUE;
 234                                 DEBUG_1("thumb fail valid: %s", tl->fd->path);
 235                                 DEBUG_1("           thumb: %s", fail_path);
 236                                 }
 237
 238                         g_object_unref(G_OBJECT(pixbuf));
 239                         }
 240
 241                 if (!result) unlink_file(fail_path);
 242                 }
 243         g_free(fail_path);
 244
 245         return result;
 246 }
 247
 248 static gint thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 249 {
 250         const gchar *valid_uri;
 251         const gchar *uri;
 252         const gchar *mtime_str;
 253         time_t mtime;
 254         gint w, h;
 255
 256         if (!pixbuf) return FALSE;
 257
 258         w = gdk_pixbuf_get_width(pixbuf);
 259         h = gdk_pixbuf_get_height(pixbuf);
 260
 261         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 262             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 263
 264         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 265
 266         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 267         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 268
 269         if (!mtime_str || !uri || !valid_uri) return FALSE;
 270         if (strcmp(uri, valid_uri) != 0) return FALSE;
 271
 272         mtime = strtol(mtime_str, NULL, 10);
 273         if (tl->source_mtime != mtime) return FALSE;
 274
 275         return TRUE;
 276 }
 277
 278 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 279 {
 280         gchar *base_path;
 281         gchar *tmp_path;
 282         gint fail;
 283
 284         if (!tl->cache_enable || tl->cache_hit) return;
 285         if (tl->thumb_path) return;
 286
 287         if (!pixbuf)
 288                 {
 289                 /* local failures are not stored */
 290                 if (tl->cache_local) return;
 291
 292                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 293                 fail = TRUE;
 294                 }
 295         else
 296                 {
 297                 g_object_ref(G_OBJECT(pixbuf));
 298                 fail = FALSE;
 299                 }
 300
 301         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 302         if (!tl->thumb_path)
 303                 {
 304                 g_object_unref(G_OBJECT(pixbuf));
 305                 return;
 306                 }
 307         tl->thumb_path_local = tl->cache_local;
 308
 309         /* create thumbnail dir if needed */
 310         base_path = remove_level_from_path(tl->thumb_path);
 311         if (tl->cache_local)
 312                 {
 313                 if (!isdir(base_path))
 314                         {
 315                         struct stat st;
 316                         gchar *source_base;
 317
 318                         source_base = remove_level_from_path(tl->fd->path);
 319                         if (stat_utf8(source_base, &st))
 320                                 {
 321                                 cache_ensure_dir_exists(base_path, st.st_mode);
 322                                 }
 323                         g_free(source_base);
 324                         }
 325                 }
 326         else
 327                 {
 328                 cache_ensure_dir_exists(base_path, THUMB_PERMS_FOLDER);
 329                 }
 330         g_free(base_path);
 331
 332         DEBUG_1("thumb saving: %s", tl->fd->path);
 333         DEBUG_1("       saved: %s", tl->thumb_path);
 334
 335         /* save thumb, using a temp file then renaming into place */
 336         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 337         if (tmp_path)
 338                 {
 339                 const gchar *mark_uri;
 340                 gchar *mark_app;
 341                 gchar *mark_mtime;
 342                 gchar *pathl;
 343                 gint success;
 344
 345                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 346
 347                 mark_app = g_strdup_printf("%s %s", GQ_APPNAME, VERSION);
 348                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 349
 350                 pathl = path_from_utf8(tmp_path);
 351                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 352                                           THUMB_MARKER_URI, mark_uri,
 353                                           THUMB_MARKER_MTIME, mark_mtime,
 354                                           THUMB_MARKER_APP, mark_app,
 355                                           NULL);
 356                 if (success)
 357                         {
 358                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 359                         success = rename_file(tmp_path, tl->thumb_path);
 360                         }
 361
 362                 g_free(pathl);
 363
 364                 g_free(mark_mtime);
 365                 g_free(mark_app);
 366
 367                 g_free(tmp_path);
 368                 if (!success)
 369                         {
 370                         DEBUG_1("thumb save failed: %s", tl->fd->path);
 371                         DEBUG_1("            thumb: %s", tl->thumb_path);
 372                         }
 373
 374                 }
 375
 376         g_object_unref(G_OBJECT(pixbuf));
 377 }
 378
 379 static gint thumb_loader_std_scale_aspect(gint req_w, gint req_h, gint old_w, gint old_h,
 380                                           gint *new_w, gint *new_h)
 381 {
 382         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 383                 {
 384                 *new_w = req_w;
 385                 *new_h = (gdouble)*new_w / old_w * old_h;
 386                 if (*new_h < 1) *new_h = 1;
 387                 }
 388         else
 389                 {
 390                 *new_h = req_h;
 391                 *new_w = (gdouble)*new_h / old_h * old_w;
 392                 if (*new_w < 1) *new_w = 1;
 393                 }
 394
 395         return (*new_w != old_w || *new_h != old_h);
 396 }
 397
 398 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf, gint shrunk)
 399 {
 400         GdkPixbuf *pixbuf_thumb = NULL;
 401         GdkPixbuf *result;
 402         GdkPixbuf *rotated = NULL;
 403         gint sw, sh;
 404
 405
 406         if (!tl->cache_hit && options->image.exif_rotate_enable)
 407                 {
 408                 if (!tl->fd->exif_orientation)
 409                         {
 410                         ExifData *exif = exif_read_fd(tl->fd);
 411                         gint orientation;
 412
 413                         if (exif && exif_get_integer(exif, "Exif.Image.Orientation", &orientation))
 414                                 tl->fd->exif_orientation = orientation;
 415                         else
 416                                 tl->fd->exif_orientation = EXIF_ORIENTATION_TOP_LEFT;
 417                         exif_free(exif);
 418                         }
 419
 420                 if (tl->fd->exif_orientation != EXIF_ORIENTATION_TOP_LEFT)
 421                         {
 422                         rotated = pixbuf_apply_orientation(pixbuf, tl->fd->exif_orientation);
 423                         pixbuf = rotated;
 424                         }
 425                 }
 426
 427         sw = gdk_pixbuf_get_width(pixbuf);
 428         sh = gdk_pixbuf_get_height(pixbuf);
 429
 430         if (tl->cache_enable)
 431                 {
 432                 if (!tl->cache_hit)
 433                         {
 434                         gint cache_w, cache_h;
 435
 436                         if (tl->requested_width > THUMB_SIZE_NORMAL || tl->requested_height > THUMB_SIZE_NORMAL)
 437                                 {
 438                                 cache_w = cache_h = THUMB_SIZE_LARGE;
 439                                 }
 440                         else
 441                                 {
 442                                 cache_w = cache_h = THUMB_SIZE_NORMAL;
 443                                 }
 444
 445                         if (sw > cache_w || sh > cache_h || shrunk)
 446                                 {
 447                                 gint thumb_w, thumb_h;
 448
 449                                 if (thumb_loader_std_scale_aspect(cache_w, cache_h, sw, sh,
 450                                                                   &thumb_w, &thumb_h))
 451                                         {
 452                                         pixbuf_thumb = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 453                                                                                (GdkInterpType)options->thumbnails.quality);
 454                                         }
 455                                 else
 456                                         {
 457                                         pixbuf_thumb = pixbuf;
 458                                         g_object_ref(G_OBJECT(pixbuf_thumb));
 459                                         }
 460
 461                                 thumb_loader_std_save(tl, pixbuf_thumb);
 462                                 }
 463                         }
 464                 else if (tl->cache_hit &&
 465                          tl->cache_local && !tl->thumb_path_local)
 466                         {
 467                         /* A local cache save was requested, but a valid thumb is in $HOME,
 468                          * so specifically save as a local thumbnail.
 469                          */
 470                         g_free(tl->thumb_path);
 471                         tl->thumb_path = NULL;
 472
 473                         tl->cache_hit = FALSE;
 474
 475                         DEBUG_1("thumb copied: %s", tl->fd->path);
 476
 477                         thumb_loader_std_save(tl, pixbuf);
 478                         }
 479                 }
 480
 481         if (sw <= tl->requested_width && sh <= tl->requested_height)
 482                 {
 483                 result = pixbuf;
 484                 g_object_ref(result);
 485                 }
 486         else
 487                 {
 488                 gint thumb_w, thumb_h;
 489
 490                 if (pixbuf_thumb)
 491                         {
 492                         pixbuf = pixbuf_thumb;
 493                         sw = gdk_pixbuf_get_width(pixbuf);
 494                         sh = gdk_pixbuf_get_height(pixbuf);
 495                         }
 496
 497                 if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height, sw, sh,
 498                                                   &thumb_w, &thumb_h))
 499                         {
 500                         result = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 501                                                          (GdkInterpType)options->thumbnails.quality);
 502                         }
 503                 else
 504                         {
 505                         result = pixbuf;
 506                         g_object_ref(result);
 507                         }
 508                 }
 509
 510         if (pixbuf_thumb) g_object_unref(pixbuf_thumb);
 511         if (rotated) g_object_unref(rotated);
 512
 513         return result;
 514 }
 515
 516 static gint thumb_loader_std_next_source(ThumbLoaderStd *tl, gint remove_broken)
 517 {
 518         image_loader_free(tl->il);
 519         tl->il = NULL;
 520
 521         if (tl->thumb_path)
 522                 {
 523                 if (!tl->thumb_path_local && remove_broken)
 524                         {
 525                         DEBUG_1("thumb broken, unlinking: %s", tl->thumb_path);
 526                         unlink_file(tl->thumb_path);
 527                         }
 528
 529                 g_free(tl->thumb_path);
 530                 tl->thumb_path = NULL;
 531
 532                 if (!tl->thumb_path_local)
 533                         {
 534                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 535                         if (isfile(tl->thumb_path) && thumb_loader_std_setup(tl, tl->thumb_path))
 536                                 {
 537                                 tl->thumb_path_local = TRUE;
 538                                 return TRUE;
 539                                 }
 540
 541                         g_free(tl->thumb_path);
 542                         tl->thumb_path = NULL;
 543                         }
 544
 545                 if (thumb_loader_std_setup(tl, tl->fd->path)) return TRUE;
 546                 }
 547
 548         thumb_loader_std_save(tl, NULL);
 549         return FALSE;
 550 }
 551
 552 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 553 {
 554         ThumbLoaderStd *tl = data;
 555         GdkPixbuf *pixbuf;
 556
 557         DEBUG_1("thumb image done: %s", tl->fd->path);
 558         DEBUG_1("            from: %s", tl->il->path);
 559
 560         pixbuf = image_loader_get_pixbuf(tl->il);
 561         if (!pixbuf)
 562                 {
 563                 DEBUG_1("...but no pixbuf");
 564                 thumb_loader_std_error_cb(il, data);
 565                 return;
 566                 }
 567
 568         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 569                 {
 570                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 571
 572                 if (tl->func_error) tl->func_error(tl, tl->data);
 573                 return;
 574                 }
 575
 576         tl->cache_hit = (tl->thumb_path != NULL);
 577
 578         if (tl->fd)
 579                 {
 580                 if (tl->fd->pixbuf) g_object_unref(tl->fd->pixbuf);
 581                 tl->fd->pixbuf = thumb_loader_std_finish(tl, pixbuf, il->shrunk);
 582                 }
 583
 584         if (tl->func_done) tl->func_done(tl, tl->data);
 585 }
 586
 587 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 588 {
 589         ThumbLoaderStd *tl = data;
 590
 591         /* if at least some of the image is available, go to done */
 592         if (image_loader_get_pixbuf(tl->il) != NULL)
 593                 {
 594                 thumb_loader_std_done_cb(il, data);
 595                 return;
 596                 }
 597
 598         DEBUG_1("thumb image error: %s", tl->fd->path);
 599         DEBUG_1("             from: %s", tl->il->fd->path);
 600
 601         if (thumb_loader_std_next_source(tl, TRUE)) return;
 602
 603         if (tl->func_error) tl->func_error(tl, tl->data);
 604 }
 605
 606 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 607 {
 608         ThumbLoaderStd *tl = data;
 609
 610         tl->progress = (gdouble)percent;
 611
 612         if (tl->func_progress) tl->func_progress(tl, tl->data);
 613 }
 614
 615 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path)
 616 {
 617         tl->il = image_loader_new_from_path(path);
 618
 619         if (options->thumbnails.fast)
 620                 {
 621                 /* this will speed up jpegs by up to 3x in some cases */
 622                 if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 623                     tl->requested_height <= THUMB_SIZE_NORMAL)
 624                         {
 625                         image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 626                         }
 627                 else
 628                         {
 629                         image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 630                         }
 631                 }
 632
 633         image_loader_set_error_func(tl->il, thumb_loader_std_error_cb, tl);
 634         if (tl->func_progress)
 635                 {
 636                 image_loader_set_percent_func(tl->il, thumb_loader_std_progress_cb, tl);
 637                 }
 638
 639         if (image_loader_start(tl->il, thumb_loader_std_done_cb, tl))
 640                 {
 641                 return TRUE;
 642                 }
 643
 644         image_loader_free(tl->il);
 645         tl->il = NULL;
 646         return FALSE;
 647 }
 648
 649 /*
 650  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 651  *       a valid existing thumb is found anywhere the local thumb will not be created.
 652  */
 653 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gint enable_cache, gint local, gint retry_failed)
 654 {
 655         if (!tl) return;
 656
 657         tl->cache_enable = enable_cache;
 658         tl->cache_local = local;
 659         tl->cache_retry = retry_failed;
 660 }
 661
 662 gint thumb_loader_std_start(ThumbLoaderStd *tl, FileData *fd)
 663 {
 664         static gchar *thumb_cache = NULL;
 665         struct stat st;
 666
 667         if (!tl || !fd) return FALSE;
 668
 669         thumb_loader_std_reset(tl);
 670
 671         if (!stat_utf8(fd->path, &st)) return FALSE;
 672
 673         tl->fd = file_data_ref(fd);
 674         tl->source_mtime = st.st_mtime;
 675         tl->source_size = st.st_size;
 676         tl->source_mode = st.st_mode;
 677
 678         if (!thumb_cache) thumb_cache = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, NULL);
 679         if (strncmp(tl->fd->path, thumb_cache, strlen(thumb_cache)) != 0)
 680                 {
 681                 gchar *pathl;
 682
 683                 pathl = path_from_utf8(fd->path);
 684                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 685                 tl->local_uri = filename_from_path(tl->thumb_uri);
 686                 g_free(pathl);
 687                 }
 688
 689         if (tl->cache_enable)
 690                 {
 691                 gint found;
 692
 693                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 694                 tl->thumb_path_local = FALSE;
 695
 696                 found = isfile(tl->thumb_path);
 697                 if (found && thumb_loader_std_setup(tl, tl->thumb_path)) return TRUE;
 698
 699                 if (thumb_loader_std_fail_check(tl)) return FALSE;
 700
 701                 return thumb_loader_std_next_source(tl, found);
 702                 }
 703
 704         if (!thumb_loader_std_setup(tl, tl->fd->path))
 705                 {
 706                 thumb_loader_std_save(tl, NULL);
 707                 return FALSE;
 708                 }
 709
 710         return TRUE;
 711 }
 712
 713 void thumb_loader_std_free(ThumbLoaderStd *tl)
 714 {
 715         if (!tl) return;
 716
 717         thumb_loader_std_reset(tl);
 718         g_free(tl);
 719 }
 720
 721 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl, gint with_fallback)
 722 {
 723         GdkPixbuf *pixbuf;
 724
 725         if (tl && tl->fd && tl->fd->pixbuf)
 726                 {
 727                 pixbuf = tl->fd->pixbuf;
 728                 g_object_ref(pixbuf);
 729                 }
 730         else if (with_fallback)
 731                 {
 732                 gint w, h;
 733
 734                 pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 735                 w = gdk_pixbuf_get_width(pixbuf);
 736                 h = gdk_pixbuf_get_height(pixbuf);
 737
 738                 if (w > tl->requested_width || h > tl->requested_height)
 739                         {
 740                         gint nw, nh;
 741
 742                         if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height,
 743                                                           w, h, &nw, &nh))
 744                                 {
 745                                 GdkPixbuf *tmp;
 746
 747                                 tmp = pixbuf;
 748                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 749                                 g_object_unref(G_OBJECT(tmp));
 750                                 }
 751                         }
 752                 }
 753         else
 754                 {
 755                 pixbuf = NULL;
 756                 }
 757
 758         return pixbuf;
 759 }
 760
 761
 762 typedef struct _ThumbValidate ThumbValidate;
 763 struct _ThumbValidate
 764 {
 765         ThumbLoaderStd *tl;
 766         gchar *path;
 767         gint days;
 768
 769         void (*func_valid)(const gchar *path, gint valid, gpointer data);
 770         gpointer data;
 771
 772         gint idle_id;
 773 };
 774
 775 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 776 {
 777         thumb_loader_std_free(tv->tl);
 778         g_free(tv->path);
 779         g_free(tv);
 780 }
 781
 782 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 783 {
 784         ThumbValidate *tv;
 785
 786         if (!tl) return;
 787
 788         tv = tl->data;
 789
 790         if (tv->idle_id != -1) g_source_remove(tv->idle_id);
 791         tv->idle_id = -1;
 792
 793         thumb_loader_std_thumb_file_validate_free(tv);
 794 }
 795
 796 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gint valid)
 797 {
 798         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 799
 800         thumb_loader_std_thumb_file_validate_free(tv);
 801 }
 802
 803 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 804 {
 805         ThumbValidate *tv = data;
 806         GdkPixbuf *pixbuf;
 807         gint valid = FALSE;
 808
 809         pixbuf = thumb_loader_std_get_pixbuf(tv->tl, FALSE);
 810         if (pixbuf)
 811                 {
 812                 const gchar *uri;
 813                 const gchar *mtime_str;
 814
 815                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 816                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 817                 if (uri && mtime_str)
 818                         {
 819                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 820                                 {
 821                                 struct stat st;
 822                                 gchar *target;
 823
 824                                 target = g_filename_from_uri(uri, NULL, NULL);
 825                                 if (stat(target, &st) == 0 &&
 826                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 827                                         {
 828                                         valid = TRUE;
 829                                         }
 830                                 g_free(target);
 831                                 }
 832                         else
 833                                 {
 834                                 struct stat st;
 835
 836                                 DEBUG_1("thumb uri foreign, doing day check: %s", uri);
 837
 838                                 if (stat_utf8(tv->path, &st))
 839                                         {
 840                                         time_t now;
 841
 842                                         now = time(NULL);
 843                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 844                                                 {
 845                                                 valid = TRUE;
 846                                                 }
 847                                         }
 848                                 }
 849                         }
 850
 851                 g_object_unref(pixbuf);
 852                 }
 853
 854         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 855 }
 856
 857 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 858 {
 859         ThumbValidate *tv = data;
 860
 861         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 862 }
 863
 864 static gint thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 865 {
 866         ThumbValidate *tv = data;
 867
 868         tv->idle_id = -1;
 869         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 870
 871         return FALSE;
 872 }
 873
 874 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 875                                                      void (*func_valid)(const gchar *path, gint valid, gpointer data),
 876                                                      gpointer data)
 877 {
 878         ThumbValidate *tv;
 879
 880         tv = g_new0(ThumbValidate, 1);
 881
 882         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 883         thumb_loader_std_set_callbacks(tv->tl,
 884                                        thumb_loader_std_thumb_file_validate_done_cb,
 885                                        thumb_loader_std_thumb_file_validate_error_cb,
 886                                        NULL,
 887                                        tv);
 888         thumb_loader_std_reset(tv->tl);
 889
 890         tv->path = g_strdup(thumb_path);
 891         tv->days = allowed_days;
 892         tv->func_valid = func_valid;
 893         tv->data = data;
 894
 895         if (!thumb_loader_std_setup(tv->tl, thumb_path))
 896                 {
 897                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 898                 }
 899         else
 900                 {
 901                 tv->idle_id = -1;
 902                 }
 903
 904         return tv->tl;
 905 }
 906
 907 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gint local,
 908                                        const gchar *subfolder)
 909 {
 910         gchar *thumb_path;
 911
 912         thumb_path = thumb_std_cache_path(source,
 913                                           (local) ? filename_from_path(uri) : uri,
 914                                           local, subfolder);
 915         if (isfile(thumb_path))
 916                 {
 917                 DEBUG_1("thumb removing: %s", thumb_path);
 918                 unlink_file(thumb_path);
 919                 }
 920         g_free(thumb_path);
 921 }
 922
 923 /* this also removes local thumbnails (the source is gone so it makes sense) */
 924 void thumb_std_maint_removed(const gchar *source)
 925 {
 926         gchar *uri;
 927         gchar *sourcel;
 928
 929         sourcel = path_from_utf8(source);
 930         uri = g_filename_to_uri(sourcel, NULL, NULL);
 931         g_free(sourcel);
 932
 933         /* all this to remove a thumbnail? */
 934
 935         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 936         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 937         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 938         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 939         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 940
 941         g_free(uri);
 942 }
 943
 944 typedef struct _TMaintMove TMaintMove;
 945 struct _TMaintMove
 946 {
 947         gchar *source;
 948         gchar *dest;
 949
 950         ThumbLoaderStd *tl;
 951         gchar *source_uri;
 952         gchar *thumb_path;
 953
 954         gint pass;
 955 };
 956
 957 static GList *thumb_std_maint_move_list = NULL;
 958 static GList *thumb_std_maint_move_tail = NULL;
 959
 960
 961 static void thumb_std_maint_move_step(TMaintMove *tm);
 962 static gint thumb_std_maint_move_idle(gpointer data);
 963
 964
 965 static void thumb_std_maint_move_validate_cb(const gchar *path, gint valid, gpointer data)
 966 {
 967         TMaintMove *tm = data;
 968         GdkPixbuf *pixbuf;
 969
 970         pixbuf = thumb_loader_std_get_pixbuf(tm->tl, FALSE);
 971         if (pixbuf)
 972                 {
 973                 const gchar *uri;
 974                 const gchar *mtime_str;
 975
 976                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 977                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 978
 979                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 980                         {
 981                         gchar *pathl;
 982
 983                         /* The validation utility abuses ThumbLoader, and we
 984                          * abuse the utility just to load the thumbnail,
 985                          * but the loader needs to look sane for the save to complete.
 986                          */
 987
 988                         tm->tl->cache_enable = TRUE;
 989                         tm->tl->cache_hit = FALSE;
 990                         tm->tl->cache_local = FALSE;
 991
 992                         file_data_unref(tm->tl->fd);
 993                         tm->tl->fd = file_data_new_simple(tm->dest);
 994                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
 995
 996                         pathl = path_from_utf8(tm->tl->fd->path);
 997                         g_free(tm->tl->thumb_uri);
 998                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 999                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
1000                         g_free(pathl);
1001
1002                         g_free(tm->tl->thumb_path);
1003                         tm->tl->thumb_path = NULL;
1004                         tm->tl->thumb_path_local = FALSE;
1005
1006                         DEBUG_1("thumb move attempting save:");
1007
1008                         thumb_loader_std_save(tm->tl, pixbuf);
1009                         }
1010
1011                 DEBUG_1("thumb move unlink: %s", tm->thumb_path);
1012                 unlink_file(tm->thumb_path);
1013                 }
1014
1015         thumb_std_maint_move_step(tm);
1016 }
1017
1018 static void thumb_std_maint_move_step(TMaintMove *tm)
1019 {
1020         const gchar *folder;
1021
1022         tm->pass++;
1023         if (tm->pass > 2)
1024                 {
1025                 g_free(tm->source);
1026                 g_free(tm->dest);
1027                 g_free(tm->source_uri);
1028                 g_free(tm->thumb_path);
1029                 g_free(tm);
1030
1031                 if (thumb_std_maint_move_list)
1032                         {
1033                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1034                         }
1035
1036                 return;
1037                 }
1038
1039         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1040
1041         g_free(tm->thumb_path);
1042         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1043         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1044                                                       thumb_std_maint_move_validate_cb, tm);
1045 }
1046
1047 static gint thumb_std_maint_move_idle(gpointer data)
1048 {
1049         TMaintMove *tm;
1050         gchar *pathl;
1051
1052         if (!thumb_std_maint_move_list) return FALSE;
1053
1054         tm = thumb_std_maint_move_list->data;
1055
1056         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1057         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1058
1059         pathl = path_from_utf8(tm->source);
1060         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1061         g_free(pathl);
1062
1063         tm->pass = 0;
1064
1065         thumb_std_maint_move_step(tm);
1066
1067         return FALSE;
1068 }
1069
1070 /* This will schedule a move of the thumbnail for source image to dest when idle.
1071  * We do this so that file renaming or moving speed is not sacrificed by
1072  * moving the thumbnails at the same time because:
1073  *
1074  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1075  *
1076  * The thumbnails are processed when the app is idle. If the app
1077  * exits early well too bad - they can simply be regenerated from scratch.
1078  *
1079  * This does not manage local thumbnails (fixme ?)
1080  */
1081 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1082 {
1083         TMaintMove *tm;
1084
1085         tm = g_new0(TMaintMove, 1);
1086         tm->source = g_strdup(source);
1087         tm->dest = g_strdup(dest);
1088
1089         if (!thumb_std_maint_move_list)
1090                 {
1091                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1092                 }
1093
1094         if (thumb_std_maint_move_tail)
1095                 {
1096                 thumb_std_maint_move_tail = g_list_append(thumb_std_maint_move_tail, tm);
1097                 thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1098                 }
1099         else
1100                 {
1101                 thumb_std_maint_move_list = g_list_append(thumb_std_maint_move_list, tm);
1102                 thumb_std_maint_move_tail = thumb_std_maint_move_list;
1103                 }
1104 }