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
  24
  25 /*
  26  * This thumbnail caching implementation attempts to conform
  27  * to the Thumbnail Managing Standard proposed on freedesktop.org
  28  * The standard is documented here:
  29  *   http://triq.net/~jens/thumbnail-spec/index.html
  30  *  (why isn't it actually hosted on freedesktop.org?)
  31  *
  32  * This code attempts to conform to version 0.7.0 of the standard.
  33  *
  34  * Notes:
  35  *   > Validation of the thumb's embedded uri is a simple strcmp between our
  36  *     version of the escaped uri and the thumb's escaped uri. But not all uri
  37  *     escape functions escape the same set of chars, comparing the unescaped
  38  *     versions may be more accurate.
  39  *   > Only Thumb::URI and Thumb::MTime are stored in a thumb at this time.
  40  *     Storing the Size, Width, Height should probably be implemented.
  41  */
  42
  43
  44 #define THUMB_SIZE_NORMAL 128
  45 #define THUMB_SIZE_LARGE  256
  46
  47 #define THUMB_MARKER_URI    "tEXt::Thumb::URI"
  48 #define THUMB_MARKER_MTIME  "tEXt::Thumb::MTime"
  49 #define THUMB_MARKER_SIZE   "tEXt::Thumb::Size"
  50 #define THUMB_MARKER_WIDTH  "tEXt::Thumb::Image::Width"
  51 #define THUMB_MARKER_HEIGHT "tEXt::Thumb::Image::Height"
  52 #define THUMB_MARKER_APP    "tEXt::Software"
  53
  54 #define THUMB_PERMS_FOLDER 0700
  55 #define THUMB_PERMS_THUMB  0600
  56
  57
  58
  59 /*
  60  *-----------------------------------------------------------------------------
  61  * thumbnail loader
  62  *-----------------------------------------------------------------------------
  63  */
  64
  65
  66 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data);
  67 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path);
  68
  69
  70 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  71 {
  72         ThumbLoaderStd *tl;
  73
  74         tl = g_new0(ThumbLoaderStd, 1);
  75
  76         tl->standard_loader = TRUE;
  77
  78         tl->requested_width = width;
  79         tl->requested_height = height;
  80
  81         tl->il = NULL;
  82         tl->fd = NULL;
  83
  84         tl->cache_enable = options->thumbnails.enable_caching;
  85         tl->cache_local = FALSE;
  86         tl->cache_retry = FALSE;
  87
  88         return tl;
  89 }
  90
  91 void thumb_loader_std_set_callbacks(ThumbLoaderStd *tl,
  92                                     ThumbLoaderStdFunc func_done,
  93                                     ThumbLoaderStdFunc func_error,
  94                                     ThumbLoaderStdFunc func_progress,
  95                                     gpointer data)
  96 {
  97         if (!tl) return;
  98
  99         tl->func_done = func_done;
 100         tl->func_error = func_error;
 101         tl->func_progress = func_progress;
 102         tl->data = data;
 103 }
 104
 105 static void thumb_loader_std_reset(ThumbLoaderStd *tl)
 106 {
 107         image_loader_free(tl->il);
 108         tl->il = NULL;
 109
 110         file_data_unref(tl->fd);
 111         tl->fd = NULL;
 112
 113         g_free(tl->thumb_path);
 114         tl->thumb_path = NULL;
 115
 116         g_free(tl->thumb_uri);
 117         tl->thumb_uri = NULL;
 118         tl->local_uri = NULL;
 119
 120         tl->thumb_path_local = FALSE;
 121
 122         tl->cache_hit = FALSE;
 123
 124         tl->source_mtime = 0;
 125         tl->source_size = 0;
 126         tl->source_mode = 0;
 127
 128         tl->progress = 0.0;
 129 }
 130
 131 static gchar *thumb_std_cache_path(const gchar *path, const gchar *uri, gint local,
 132                                    const gchar *cache_subfolder)
 133 {
 134         gchar *result = NULL;
 135         gchar *md5_text;
 136         guchar digest[16];
 137         gchar *name;
 138
 139         if (!path || !uri || !cache_subfolder) return NULL;
 140
 141         md5_get_digest((guchar *)uri, strlen(uri), digest);
 142         md5_text = md5_digest_to_text(digest);
 143
 144         if (!md5_text) return NULL;
 145
 146         name = g_strconcat(md5_text, THUMB_NAME_EXTENSION, NULL);
 147
 148         if (local)
 149                 {
 150                 gchar *base = remove_level_from_path(path);
 151
 152                 result = g_build_filename(base, THUMB_FOLDER_LOCAL, cache_subfolder, name, NULL);
 153                 g_free(base);
 154                 }
 155         else
 156                 {
 157                 result = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, cache_subfolder, name, NULL);
 158                 }
 159
 160         g_free(name);
 161         g_free(md5_text);
 162
 163         return result;
 164 }
 165
 166 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gint local, GdkPixbuf *pixbuf, gint fail)
 167 {
 168         const gchar *folder;
 169         gint w, h;
 170
 171         if (!tl->fd || !tl->thumb_uri) return NULL;
 172
 173         if (pixbuf)
 174                 {
 175                 w = gdk_pixbuf_get_width(pixbuf);
 176                 h = gdk_pixbuf_get_height(pixbuf);
 177                 }
 178         else
 179                 {
 180                 w = tl->requested_width;
 181                 h = tl->requested_height;
 182                 }
 183
 184         if (fail)
 185                 {
 186                 folder = THUMB_FOLDER_FAIL;
 187                 }
 188         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 189                 {
 190                 folder = THUMB_FOLDER_LARGE;
 191                 }
 192         else
 193                 {
 194                 folder = THUMB_FOLDER_NORMAL;
 195                 }
 196
 197         return thumb_std_cache_path(tl->fd->path,
 198                                     (local) ?  tl->local_uri : tl->thumb_uri,
 199                                     local, folder);
 200 }
 201
 202 static gint thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 203 {
 204         gchar *fail_path;
 205         gint result = FALSE;
 206
 207         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 208         if (isfile(fail_path))
 209                 {
 210                 GdkPixbuf *pixbuf;
 211
 212                 if (tl->cache_retry)
 213                         {
 214                         pixbuf = NULL;
 215                         }
 216                 else
 217                         {
 218                         gchar *pathl;
 219
 220                         pathl = path_from_utf8(fail_path);
 221                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 222                         g_free(pathl);
 223                         }
 224
 225                 if (pixbuf)
 226                         {
 227                         const gchar *mtime_str;
 228
 229                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 230                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 231                                 {
 232                                 result = TRUE;
 233                                 DEBUG_1("thumb fail valid: %s", tl->fd->path);
 234                                 DEBUG_1("           thumb: %s", fail_path);
 235                                 }
 236
 237                         g_object_unref(G_OBJECT(pixbuf));
 238                         }
 239
 240                 if (!result) unlink_file(fail_path);
 241                 }
 242         g_free(fail_path);
 243
 244         return result;
 245 }
 246
 247 static gint thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 248 {
 249         const gchar *valid_uri;
 250         const gchar *uri;
 251         const gchar *mtime_str;
 252         time_t mtime;
 253         gint w, h;
 254
 255         if (!pixbuf) return FALSE;
 256
 257         w = gdk_pixbuf_get_width(pixbuf);
 258         h = gdk_pixbuf_get_height(pixbuf);
 259
 260         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 261             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 262
 263         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 264
 265         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 266         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 267
 268         if (!mtime_str || !uri || !valid_uri) return FALSE;
 269         if (strcmp(uri, valid_uri) != 0) return FALSE;
 270
 271         mtime = strtol(mtime_str, NULL, 10);
 272         if (tl->source_mtime != mtime) return FALSE;
 273
 274         return TRUE;
 275 }
 276
 277 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 278 {
 279         gchar *base_path;
 280         gchar *tmp_path;
 281         gint fail;
 282
 283         if (!tl->cache_enable || tl->cache_hit) return;
 284         if (tl->thumb_path) return;
 285
 286         if (!pixbuf)
 287                 {
 288                 /* local failures are not stored */
 289                 if (tl->cache_local) return;
 290
 291                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 292                 fail = TRUE;
 293                 }
 294         else
 295                 {
 296                 g_object_ref(G_OBJECT(pixbuf));
 297                 fail = FALSE;
 298                 }
 299
 300         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 301         if (!tl->thumb_path)
 302                 {
 303                 g_object_unref(G_OBJECT(pixbuf));
 304                 return;
 305                 }
 306         tl->thumb_path_local = tl->cache_local;
 307
 308         /* create thumbnail dir if needed */
 309         base_path = remove_level_from_path(tl->thumb_path);
 310         if (tl->cache_local)
 311                 {
 312                 if (!isdir(base_path))
 313                         {
 314                         struct stat st;
 315                         gchar *source_base;
 316
 317                         source_base = remove_level_from_path(tl->fd->path);
 318                         if (stat_utf8(source_base, &st))
 319                                 {
 320                                 cache_ensure_dir_exists(base_path, st.st_mode);
 321                                 }
 322                         g_free(source_base);
 323                         }
 324                 }
 325         else
 326                 {
 327                 cache_ensure_dir_exists(base_path, THUMB_PERMS_FOLDER);
 328                 }
 329         g_free(base_path);
 330
 331         DEBUG_1("thumb saving: %s", tl->fd->path);
 332         DEBUG_1("       saved: %s", tl->thumb_path);
 333
 334         /* save thumb, using a temp file then renaming into place */
 335         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 336         if (tmp_path)
 337                 {
 338                 const gchar *mark_uri;
 339                 gchar *mark_app;
 340                 gchar *mark_mtime;
 341                 gchar *pathl;
 342                 gint success;
 343
 344                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 345
 346                 mark_app = g_strdup_printf("%s %s", GQ_APPNAME, VERSION);
 347                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 348
 349                 pathl = path_from_utf8(tmp_path);
 350                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 351                                           THUMB_MARKER_URI, mark_uri,
 352                                           THUMB_MARKER_MTIME, mark_mtime,
 353                                           THUMB_MARKER_APP, mark_app,
 354                                           NULL);
 355                 if (success)
 356                         {
 357                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 358                         success = rename_file(tmp_path, tl->thumb_path);
 359                         }
 360
 361                 g_free(pathl);
 362
 363                 g_free(mark_mtime);
 364                 g_free(mark_app);
 365
 366                 g_free(tmp_path);
 367                 if (!success)
 368                         {
 369                         DEBUG_1("thumb save failed: %s", tl->fd->path);
 370                         DEBUG_1("            thumb: %s", tl->thumb_path);
 371                         }
 372
 373                 }
 374
 375         g_object_unref(G_OBJECT(pixbuf));
 376 }
 377
 378 static gint thumb_loader_std_scale_aspect(gint req_w, gint req_h, gint old_w, gint old_h,
 379                                           gint *new_w, gint *new_h)
 380 {
 381         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 382                 {
 383                 *new_w = req_w;
 384                 *new_h = (gdouble)*new_w / old_w * old_h;
 385                 if (*new_h < 1) *new_h = 1;
 386                 }
 387         else
 388                 {
 389                 *new_h = req_h;
 390                 *new_w = (gdouble)*new_h / old_h * old_w;
 391                 if (*new_w < 1) *new_w = 1;
 392                 }
 393
 394         return (*new_w != old_w || *new_h != old_h);
 395 }
 396
 397 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf, gint shrunk)
 398 {
 399         GdkPixbuf *pixbuf_thumb = NULL;
 400         GdkPixbuf *result;
 401         gint sw, sh;
 402
 403         sw = gdk_pixbuf_get_width(pixbuf);
 404         sh = gdk_pixbuf_get_height(pixbuf);
 405
 406         if (tl->cache_enable)
 407                 {
 408                 if (!tl->cache_hit)
 409                         {
 410                         gint cache_w, cache_h;
 411
 412                         if (tl->requested_width > THUMB_SIZE_NORMAL || tl->requested_height > THUMB_SIZE_NORMAL)
 413                                 {
 414                                 cache_w = cache_h = THUMB_SIZE_LARGE;
 415                                 }
 416                         else
 417                                 {
 418                                 cache_w = cache_h = THUMB_SIZE_NORMAL;
 419                                 }
 420
 421                         if (sw > cache_w || sh > cache_h || shrunk)
 422                                 {
 423                                 gint thumb_w, thumb_h;
 424
 425                                 if (thumb_loader_std_scale_aspect(cache_w, cache_h, sw, sh,
 426                                                                   &thumb_w, &thumb_h))
 427                                         {
 428                                         pixbuf_thumb = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 429                                                                                (GdkInterpType)options->thumbnails.quality);
 430                                         }
 431                                 else
 432                                         {
 433                                         pixbuf_thumb = pixbuf;
 434                                         g_object_ref(G_OBJECT(pixbuf_thumb));
 435                                         }
 436
 437                                 thumb_loader_std_save(tl, pixbuf_thumb);
 438                                 }
 439                         }
 440                 else if (tl->cache_hit &&
 441                          tl->cache_local && !tl->thumb_path_local)
 442                         {
 443                         /* A local cache save was requested, but a valid thumb is in $HOME,
 444                          * so specifically save as a local thumbnail.
 445                          */
 446                         g_free(tl->thumb_path);
 447                         tl->thumb_path = NULL;
 448
 449                         tl->cache_hit = FALSE;
 450
 451                         DEBUG_1("thumb copied: %s", tl->fd->path);
 452
 453                         thumb_loader_std_save(tl, pixbuf);
 454                         }
 455                 }
 456
 457         if (sw <= tl->requested_width && sh <= tl->requested_height)
 458                 {
 459                 result = pixbuf;
 460                 g_object_ref(result);
 461                 }
 462         else
 463                 {
 464                 gint thumb_w, thumb_h;
 465
 466                 if (pixbuf_thumb)
 467                         {
 468                         pixbuf = pixbuf_thumb;
 469                         sw = gdk_pixbuf_get_width(pixbuf);
 470                         sh = gdk_pixbuf_get_height(pixbuf);
 471                         }
 472
 473                 if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height, sw, sh,
 474                                                   &thumb_w, &thumb_h))
 475                         {
 476                         result = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 477                                                          (GdkInterpType)options->thumbnails.quality);
 478                         }
 479                 else
 480                         {
 481                         result = pixbuf;
 482                         g_object_ref(result);
 483                         }
 484                 }
 485
 486         if (pixbuf_thumb) g_object_unref(pixbuf_thumb);
 487
 488         return result;
 489 }
 490
 491 static gint thumb_loader_std_next_source(ThumbLoaderStd *tl, gint remove_broken)
 492 {
 493         image_loader_free(tl->il);
 494         tl->il = NULL;
 495
 496         if (tl->thumb_path)
 497                 {
 498                 if (!tl->thumb_path_local && remove_broken)
 499                         {
 500                         DEBUG_1("thumb broken, unlinking: %s", tl->thumb_path);
 501                         unlink_file(tl->thumb_path);
 502                         }
 503
 504                 g_free(tl->thumb_path);
 505                 tl->thumb_path = NULL;
 506
 507                 if (!tl->thumb_path_local)
 508                         {
 509                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 510                         if (isfile(tl->thumb_path) && thumb_loader_std_setup(tl, tl->thumb_path))
 511                                 {
 512                                 tl->thumb_path_local = TRUE;
 513                                 return TRUE;
 514                                 }
 515
 516                         g_free(tl->thumb_path);
 517                         tl->thumb_path = NULL;
 518                         }
 519
 520                 if (thumb_loader_std_setup(tl, tl->fd->path)) return TRUE;
 521                 }
 522
 523         thumb_loader_std_save(tl, NULL);
 524         return FALSE;
 525 }
 526
 527 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 528 {
 529         ThumbLoaderStd *tl = data;
 530         GdkPixbuf *pixbuf;
 531
 532         DEBUG_1("thumb image done: %s", tl->fd->path);
 533         DEBUG_1("            from: %s", tl->il->path);
 534
 535         pixbuf = image_loader_get_pixbuf(tl->il);
 536         if (!pixbuf)
 537                 {
 538                 DEBUG_1("...but no pixbuf");
 539                 thumb_loader_std_error_cb(il, data);
 540                 return;
 541                 }
 542
 543         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 544                 {
 545                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 546
 547                 if (tl->func_error) tl->func_error(tl, tl->data);
 548                 return;
 549                 }
 550
 551         tl->cache_hit = (tl->thumb_path != NULL);
 552
 553         if (tl->fd)
 554                 {
 555                 if (tl->fd->pixbuf) g_object_unref(tl->fd->pixbuf);
 556                 tl->fd->pixbuf = thumb_loader_std_finish(tl, pixbuf, il->shrunk);
 557                 }
 558
 559         if (tl->func_done) tl->func_done(tl, tl->data);
 560 }
 561
 562 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 563 {
 564         ThumbLoaderStd *tl = data;
 565
 566         /* if at least some of the image is available, go to done */
 567         if (image_loader_get_pixbuf(tl->il) != NULL)
 568                 {
 569                 thumb_loader_std_done_cb(il, data);
 570                 return;
 571                 }
 572
 573         DEBUG_1("thumb image error: %s", tl->fd->path);
 574         DEBUG_1("             from: %s", tl->il->fd->path);
 575
 576         if (thumb_loader_std_next_source(tl, TRUE)) return;
 577
 578         if (tl->func_error) tl->func_error(tl, tl->data);
 579 }
 580
 581 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 582 {
 583         ThumbLoaderStd *tl = data;
 584
 585         tl->progress = (gdouble)percent;
 586
 587         if (tl->func_progress) tl->func_progress(tl, tl->data);
 588 }
 589
 590 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path)
 591 {
 592         tl->il = image_loader_new_from_path(path);
 593
 594         if (options->thumbnails.fast)
 595                 {
 596                 /* this will speed up jpegs by up to 3x in some cases */
 597                 if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 598                     tl->requested_height <= THUMB_SIZE_NORMAL)
 599                         {
 600                         image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 601                         }
 602                 else
 603                         {
 604                         image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 605                         }
 606                 }
 607
 608         image_loader_set_error_func(tl->il, thumb_loader_std_error_cb, tl);
 609         if (tl->func_progress)
 610                 {
 611                 image_loader_set_percent_func(tl->il, thumb_loader_std_progress_cb, tl);
 612                 }
 613
 614         if (image_loader_start(tl->il, thumb_loader_std_done_cb, tl))
 615                 {
 616                 return TRUE;
 617                 }
 618
 619         image_loader_free(tl->il);
 620         tl->il = NULL;
 621         return FALSE;
 622 }
 623
 624 /*
 625  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 626  *       a valid existing thumb is found anywhere the local thumb will not be created.
 627  */
 628 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gint enable_cache, gint local, gint retry_failed)
 629 {
 630         if (!tl) return;
 631
 632         tl->cache_enable = enable_cache;
 633         tl->cache_local = local;
 634         tl->cache_retry = retry_failed;
 635 }
 636
 637 gint thumb_loader_std_start(ThumbLoaderStd *tl, FileData *fd)
 638 {
 639         static gchar *thumb_cache = NULL;
 640         struct stat st;
 641
 642         if (!tl || !fd) return FALSE;
 643
 644         thumb_loader_std_reset(tl);
 645
 646         if (!stat_utf8(fd->path, &st)) return FALSE;
 647
 648         tl->fd = file_data_ref(fd);
 649         tl->source_mtime = st.st_mtime;
 650         tl->source_size = st.st_size;
 651         tl->source_mode = st.st_mode;
 652
 653         if (!thumb_cache) thumb_cache = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, NULL);
 654         if (strncmp(tl->fd->path, thumb_cache, strlen(thumb_cache)) != 0)
 655                 {
 656                 gchar *pathl;
 657
 658                 pathl = path_from_utf8(fd->path);
 659                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 660                 tl->local_uri = filename_from_path(tl->thumb_uri);
 661                 g_free(pathl);
 662                 }
 663
 664         if (tl->cache_enable)
 665                 {
 666                 gint found;
 667
 668                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 669                 tl->thumb_path_local = FALSE;
 670
 671                 found = isfile(tl->thumb_path);
 672                 if (found && thumb_loader_std_setup(tl, tl->thumb_path)) return TRUE;
 673
 674                 if (thumb_loader_std_fail_check(tl)) return FALSE;
 675
 676                 return thumb_loader_std_next_source(tl, found);
 677                 }
 678
 679         if (!thumb_loader_std_setup(tl, tl->fd->path))
 680                 {
 681                 thumb_loader_std_save(tl, NULL);
 682                 return FALSE;
 683                 }
 684
 685         return TRUE;
 686 }
 687
 688 void thumb_loader_std_free(ThumbLoaderStd *tl)
 689 {
 690         if (!tl) return;
 691
 692         thumb_loader_std_reset(tl);
 693         g_free(tl);
 694 }
 695
 696 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl, gint with_fallback)
 697 {
 698         GdkPixbuf *pixbuf;
 699
 700         if (tl && tl->fd && tl->fd->pixbuf)
 701                 {
 702                 pixbuf = tl->fd->pixbuf;
 703                 g_object_ref(pixbuf);
 704                 }
 705         else if (with_fallback)
 706                 {
 707                 gint w, h;
 708
 709                 pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 710                 w = gdk_pixbuf_get_width(pixbuf);
 711                 h = gdk_pixbuf_get_height(pixbuf);
 712
 713                 if (w > tl->requested_width || h > tl->requested_height)
 714                         {
 715                         gint nw, nh;
 716
 717                         if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height,
 718                                                           w, h, &nw, &nh))
 719                                 {
 720                                 GdkPixbuf *tmp;
 721
 722                                 tmp = pixbuf;
 723                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 724                                 g_object_unref(G_OBJECT(tmp));
 725                                 }
 726                         }
 727                 }
 728         else
 729                 {
 730                 pixbuf = NULL;
 731                 }
 732
 733         return pixbuf;
 734 }
 735
 736
 737 typedef struct _ThumbValidate ThumbValidate;
 738 struct _ThumbValidate
 739 {
 740         ThumbLoaderStd *tl;
 741         gchar *path;
 742         gint days;
 743
 744         void (*func_valid)(const gchar *path, gint valid, gpointer data);
 745         gpointer data;
 746
 747         gint idle_id;
 748 };
 749
 750 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 751 {
 752         thumb_loader_std_free(tv->tl);
 753         g_free(tv->path);
 754         g_free(tv);
 755 }
 756
 757 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 758 {
 759         ThumbValidate *tv;
 760
 761         if (!tl) return;
 762
 763         tv = tl->data;
 764
 765         if (tv->idle_id != -1) g_source_remove(tv->idle_id);
 766         tv->idle_id = -1;
 767
 768         thumb_loader_std_thumb_file_validate_free(tv);
 769 }
 770
 771 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gint valid)
 772 {
 773         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 774
 775         thumb_loader_std_thumb_file_validate_free(tv);
 776 }
 777
 778 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 779 {
 780         ThumbValidate *tv = data;
 781         GdkPixbuf *pixbuf;
 782         gint valid = FALSE;
 783
 784         pixbuf = thumb_loader_std_get_pixbuf(tv->tl, FALSE);
 785         if (pixbuf)
 786                 {
 787                 const gchar *uri;
 788                 const gchar *mtime_str;
 789
 790                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 791                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 792                 if (uri && mtime_str)
 793                         {
 794                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 795                                 {
 796                                 struct stat st;
 797                                 gchar *target;
 798
 799                                 target = g_filename_from_uri(uri, NULL, NULL);
 800                                 if (stat(target, &st) == 0 &&
 801                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 802                                         {
 803                                         valid = TRUE;
 804                                         }
 805                                 g_free(target);
 806                                 }
 807                         else
 808                                 {
 809                                 struct stat st;
 810
 811                                 DEBUG_1("thumb uri foreign, doing day check: %s", uri);
 812
 813                                 if (stat_utf8(tv->path, &st))
 814                                         {
 815                                         time_t now;
 816
 817                                         now = time(NULL);
 818                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 819                                                 {
 820                                                 valid = TRUE;
 821                                                 }
 822                                         }
 823                                 }
 824                         }
 825
 826                 g_object_unref(pixbuf);
 827                 }
 828
 829         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 830 }
 831
 832 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 833 {
 834         ThumbValidate *tv = data;
 835
 836         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 837 }
 838
 839 static gint thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 840 {
 841         ThumbValidate *tv = data;
 842
 843         tv->idle_id = -1;
 844         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 845
 846         return FALSE;
 847 }
 848
 849 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 850                                                      void (*func_valid)(const gchar *path, gint valid, gpointer data),
 851                                                      gpointer data)
 852 {
 853         ThumbValidate *tv;
 854
 855         tv = g_new0(ThumbValidate, 1);
 856
 857         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 858         thumb_loader_std_set_callbacks(tv->tl,
 859                                        thumb_loader_std_thumb_file_validate_done_cb,
 860                                        thumb_loader_std_thumb_file_validate_error_cb,
 861                                        NULL,
 862                                        tv);
 863         thumb_loader_std_reset(tv->tl);
 864
 865         tv->path = g_strdup(thumb_path);
 866         tv->days = allowed_days;
 867         tv->func_valid = func_valid;
 868         tv->data = data;
 869
 870         if (!thumb_loader_std_setup(tv->tl, thumb_path))
 871                 {
 872                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 873                 }
 874         else
 875                 {
 876                 tv->idle_id = -1;
 877                 }
 878
 879         return tv->tl;
 880 }
 881
 882 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gint local,
 883                                        const gchar *subfolder)
 884 {
 885         gchar *thumb_path;
 886
 887         thumb_path = thumb_std_cache_path(source,
 888                                           (local) ? filename_from_path(uri) : uri,
 889                                           local, subfolder);
 890         if (isfile(thumb_path))
 891                 {
 892                 DEBUG_1("thumb removing: %s", thumb_path);
 893                 unlink_file(thumb_path);
 894                 }
 895         g_free(thumb_path);
 896 }
 897
 898 /* this also removes local thumbnails (the source is gone so it makes sense) */
 899 void thumb_std_maint_removed(const gchar *source)
 900 {
 901         gchar *uri;
 902         gchar *sourcel;
 903
 904         sourcel = path_from_utf8(source);
 905         uri = g_filename_to_uri(sourcel, NULL, NULL);
 906         g_free(sourcel);
 907
 908         /* all this to remove a thumbnail? */
 909
 910         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 911         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 912         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 913         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 914         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 915
 916         g_free(uri);
 917 }
 918
 919 typedef struct _TMaintMove TMaintMove;
 920 struct _TMaintMove
 921 {
 922         gchar *source;
 923         gchar *dest;
 924
 925         ThumbLoaderStd *tl;
 926         gchar *source_uri;
 927         gchar *thumb_path;
 928
 929         gint pass;
 930 };
 931
 932 static GList *thumb_std_maint_move_list = NULL;
 933 static GList *thumb_std_maint_move_tail = NULL;
 934
 935
 936 static void thumb_std_maint_move_step(TMaintMove *tm);
 937 static gint thumb_std_maint_move_idle(gpointer data);
 938
 939
 940 static void thumb_std_maint_move_validate_cb(const gchar *path, gint valid, gpointer data)
 941 {
 942         TMaintMove *tm = data;
 943         GdkPixbuf *pixbuf;
 944
 945         pixbuf = thumb_loader_std_get_pixbuf(tm->tl, FALSE);
 946         if (pixbuf)
 947                 {
 948                 const gchar *uri;
 949                 const gchar *mtime_str;
 950
 951                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 952                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 953
 954                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 955                         {
 956                         gchar *pathl;
 957
 958                         /* The validation utility abuses ThumbLoader, and we
 959                          * abuse the utility just to load the thumbnail,
 960                          * but the loader needs to look sane for the save to complete.
 961                          */
 962
 963                         tm->tl->cache_enable = TRUE;
 964                         tm->tl->cache_hit = FALSE;
 965                         tm->tl->cache_local = FALSE;
 966
 967                         file_data_unref(tm->tl->fd);
 968                         tm->tl->fd = file_data_new_simple(tm->dest);
 969                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
 970
 971                         pathl = path_from_utf8(tm->tl->fd->path);
 972                         g_free(tm->tl->thumb_uri);
 973                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 974                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
 975                         g_free(pathl);
 976
 977                         g_free(tm->tl->thumb_path);
 978                         tm->tl->thumb_path = NULL;
 979                         tm->tl->thumb_path_local = FALSE;
 980
 981                         DEBUG_1("thumb move attempting save:");
 982
 983                         thumb_loader_std_save(tm->tl, pixbuf);
 984                         }
 985
 986                 DEBUG_1("thumb move unlink: %s", tm->thumb_path);
 987                 unlink_file(tm->thumb_path);
 988                 }
 989
 990         thumb_std_maint_move_step(tm);
 991 }
 992
 993 static void thumb_std_maint_move_step(TMaintMove *tm)
 994 {
 995         const gchar *folder;
 996
 997         tm->pass++;
 998         if (tm->pass > 2)
 999                 {
1000                 g_free(tm->source);
1001                 g_free(tm->dest);
1002                 g_free(tm->source_uri);
1003                 g_free(tm->thumb_path);
1004                 g_free(tm);
1005
1006                 if (thumb_std_maint_move_list)
1007                         {
1008                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1009                         }
1010
1011                 return;
1012                 }
1013
1014         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1015
1016         g_free(tm->thumb_path);
1017         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1018         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1019                                                       thumb_std_maint_move_validate_cb, tm);
1020 }
1021
1022 static gint thumb_std_maint_move_idle(gpointer data)
1023 {
1024         TMaintMove *tm;
1025         gchar *pathl;
1026
1027         if (!thumb_std_maint_move_list) return FALSE;
1028
1029         tm = thumb_std_maint_move_list->data;
1030
1031         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1032         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1033
1034         pathl = path_from_utf8(tm->source);
1035         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1036         g_free(pathl);
1037
1038         tm->pass = 0;
1039
1040         thumb_std_maint_move_step(tm);
1041
1042         return FALSE;
1043 }
1044
1045 /* This will schedule a move of the thumbnail for source image to dest when idle.
1046  * We do this so that file renaming or moving speed is not sacrificed by
1047  * moving the thumbnails at the same time because:
1048  *
1049  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1050  *
1051  * The thumbnails are processed when the app is idle. If the app
1052  * exits early well too bad - they can simply be regenerated from scratch.
1053  *
1054  * This does not manage local thumbnails (fixme ?)
1055  */
1056 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1057 {
1058         TMaintMove *tm;
1059
1060         tm = g_new0(TMaintMove, 1);
1061         tm->source = g_strdup(source);
1062         tm->dest = g_strdup(dest);
1063
1064         if (!thumb_std_maint_move_list)
1065                 {
1066                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1067                 }
1068
1069         if (thumb_std_maint_move_tail)
1070                 {
1071                 thumb_std_maint_move_tail = g_list_append(thumb_std_maint_move_tail, tm);
1072                 thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1073                 }
1074         else
1075                 {
1076                 thumb_std_maint_move_list = g_list_append(thumb_std_maint_move_list, tm);
1077                 thumb_std_maint_move_tail = thumb_std_maint_move_list;
1078                 }
1079 }