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
  23
  24 /*
  25  * This thumbnail caching implementation attempts to conform
  26  * to the Thumbnail Managing Standard proposed on freedesktop.org
  27  * The standard is documented here:
  28  *   http://triq.net/~jens/thumbnail-spec/index.html
  29  *  (why isn't it actually hosted on freedesktop.org?)
  30  *
  31  * This code attempts to conform to version 0.7.0 of the standard.
  32  *
  33  * Notes:
  34  *   > Validation of the thumb's embedded uri is a simple strcmp between our
  35  *     version of the escaped uri and the thumb's escaped uri. But not all uri
  36  *     escape functions escape the same set of chars, comparing the unescaped
  37  *     versions may be more accurate.
  38  *   > Only Thumb::URI and Thumb::MTime are stored in a thumb at this time.
  39  *     Storing the Size, Width, Height should probably be implemented.
  40  */
  41
  42
  43 #define THUMB_SIZE_NORMAL 128
  44 #define THUMB_SIZE_LARGE  256
  45
  46 #define THUMB_MARKER_URI    "tEXt::Thumb::URI"
  47 #define THUMB_MARKER_MTIME  "tEXt::Thumb::MTime"
  48 #define THUMB_MARKER_SIZE   "tEXt::Thumb::Size"
  49 #define THUMB_MARKER_WIDTH  "tEXt::Thumb::Image::Width"
  50 #define THUMB_MARKER_HEIGHT "tEXt::Thumb::Image::Height"
  51 #define THUMB_MARKER_APP    "tEXt::Software"
  52
  53 #define THUMB_PERMS_FOLDER 0700
  54 #define THUMB_PERMS_THUMB  0600
  55
  56
  57
  58 /*
  59  *-----------------------------------------------------------------------------
  60  * thumbnail loader
  61  *-----------------------------------------------------------------------------
  62  */
  63
  64
  65 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data);
  66 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path);
  67
  68
  69 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  70 {
  71         ThumbLoaderStd *tl;
  72
  73         tl = g_new0(ThumbLoaderStd, 1);
  74
  75         tl->standard_loader = TRUE;
  76
  77         tl->requested_width = width;
  78         tl->requested_height = height;
  79
  80         tl->pixbuf = NULL;
  81         tl->il = NULL;
  82         tl->source_path = 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         if (tl->pixbuf) g_object_unref(tl->pixbuf);
 108         tl->pixbuf = NULL;
 109
 110         image_loader_free(tl->il);
 111         tl->il = NULL;
 112
 113         g_free(tl->source_path);
 114         tl->source_path = NULL;
 115
 116         g_free(tl->thumb_path);
 117         tl->thumb_path = NULL;
 118
 119         g_free(tl->thumb_uri);
 120         tl->thumb_uri = NULL;
 121         tl->local_uri = NULL;
 122
 123         tl->thumb_path_local = FALSE;
 124
 125         tl->cache_hit = FALSE;
 126
 127         tl->source_mtime = 0;
 128         tl->source_size = 0;
 129         tl->source_mode = 0;
 130
 131         tl->progress = 0.0;
 132 }
 133
 134 static gchar *thumb_std_cache_path(const gchar *path, const gchar *uri, gint local,
 135                                    const gchar *cache_subfolder)
 136 {
 137         gchar *result = NULL;
 138         gchar *cache_base;
 139         gchar *md5_text;
 140         guchar digest[16];
 141
 142         if (!path || !uri || !cache_subfolder) return NULL;
 143
 144         if (local)
 145                 {
 146                 gchar *base;
 147
 148                 base = remove_level_from_path(path);
 149                 cache_base = g_strconcat(base, "/", THUMB_FOLDER_LOCAL, "/", cache_subfolder, NULL);
 150                 g_free(base);
 151                 }
 152         else
 153                 {
 154                 cache_base = g_strconcat(homedir(), "/", THUMB_FOLDER_GLOBAL, "/", cache_subfolder, NULL);
 155                 }
 156
 157         md5_get_digest((guchar *)uri, strlen(uri), digest);
 158         md5_text = md5_digest_to_text(digest);
 159
 160         if (cache_base && md5_text)
 161                 {
 162                 result = g_strconcat(cache_base, "/", md5_text, THUMB_NAME_EXTENSION, NULL);
 163                 }
 164
 165         g_free(cache_base);
 166         g_free(md5_text);
 167
 168         return result;
 169 }
 170
 171 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gint local, GdkPixbuf *pixbuf, gint fail)
 172 {
 173         const gchar *folder;
 174         gint w, h;
 175
 176         if (!tl->source_path || !tl->thumb_uri) return NULL;
 177
 178         if (pixbuf)
 179                 {
 180                 w = gdk_pixbuf_get_width(pixbuf);
 181                 h = gdk_pixbuf_get_height(pixbuf);
 182                 }
 183         else
 184                 {
 185                 w = tl->requested_width;
 186                 h = tl->requested_height;
 187                 }
 188
 189         if (fail)
 190                 {
 191                 folder = THUMB_FOLDER_FAIL;
 192                 }
 193         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 194                 {
 195                 folder = THUMB_FOLDER_LARGE;
 196                 }
 197         else
 198                 {
 199                 folder = THUMB_FOLDER_NORMAL;
 200                 }
 201
 202         return thumb_std_cache_path(tl->source_path,
 203                                     (local) ?  tl->local_uri : tl->thumb_uri,
 204                                     local, folder);
 205 }
 206
 207 static gint thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 208 {
 209         gchar *fail_path;
 210         gint result = FALSE;
 211
 212         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 213         if (isfile(fail_path))
 214                 {
 215                 GdkPixbuf *pixbuf;
 216
 217                 if (tl->cache_retry)
 218                         {
 219                         pixbuf = NULL;
 220                         }
 221                 else
 222                         {
 223                         gchar *pathl;
 224
 225                         pathl = path_from_utf8(fail_path);
 226                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 227                         g_free(pathl);
 228                         }
 229
 230                 if (pixbuf)
 231                         {
 232                         const gchar *mtime_str;
 233
 234                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 235                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 236                                 {
 237                                 result = TRUE;
 238                                 DEBUG_1("thumb fail valid: %s", tl->source_path);
 239                                 DEBUG_1("           thumb: %s", fail_path);
 240                                 }
 241
 242                         g_object_unref(G_OBJECT(pixbuf));
 243                         }
 244
 245                 if (!result) unlink_file(fail_path);
 246                 }
 247         g_free(fail_path);
 248
 249         return result;
 250 }
 251
 252 static gint thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 253 {
 254         const gchar *valid_uri;
 255         const gchar *uri;
 256         const gchar *mtime_str;
 257         time_t mtime;
 258         gint w, h;
 259
 260         if (!pixbuf) return FALSE;
 261
 262         w = gdk_pixbuf_get_width(pixbuf);
 263         h = gdk_pixbuf_get_height(pixbuf);
 264
 265         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 266             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 267
 268         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 269
 270         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 271         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 272
 273         if (!mtime_str || !uri || !valid_uri) return FALSE;
 274         if (strcmp(uri, valid_uri) != 0) return FALSE;
 275
 276         mtime = strtol(mtime_str, NULL, 10);
 277         if (tl->source_mtime != mtime) return FALSE;
 278
 279         return TRUE;
 280 }
 281
 282 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 283 {
 284         gchar *base_path;
 285         gchar *tmp_path;
 286         gint fail;
 287
 288         if (!tl->cache_enable || tl->cache_hit) return;
 289         if (tl->thumb_path) return;
 290
 291         if (!pixbuf)
 292                 {
 293                 /* local failures are not stored */
 294                 if (tl->cache_local) return;
 295
 296                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 297                 fail = TRUE;
 298                 }
 299         else
 300                 {
 301                 g_object_ref(G_OBJECT(pixbuf));
 302                 fail = FALSE;
 303                 }
 304
 305         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 306         if (!tl->thumb_path)
 307                 {
 308                 g_object_unref(G_OBJECT(pixbuf));
 309                 return;
 310                 }
 311         tl->thumb_path_local = tl->cache_local;
 312
 313         /* create thumbnail dir if needed */
 314         base_path = remove_level_from_path(tl->thumb_path);
 315         if (tl->cache_local)
 316                 {
 317                 if (!isdir(base_path))
 318                         {
 319                         struct stat st;
 320                         gchar *source_base;
 321
 322                         source_base = remove_level_from_path(tl->source_path);
 323                         if (stat_utf8(source_base, &st))
 324                                 {
 325                                 cache_ensure_dir_exists(base_path, st.st_mode);
 326                                 }
 327                         g_free(source_base);
 328                         }
 329                 }
 330         else
 331                 {
 332                 cache_ensure_dir_exists(base_path, THUMB_PERMS_FOLDER);
 333                 }
 334         g_free(base_path);
 335
 336         DEBUG_1("thumb saving: %s", tl->source_path);
 337         DEBUG_1("       saved: %s", tl->thumb_path);
 338
 339         /* save thumb, using a temp file then renaming into place */
 340         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 341         if (tmp_path)
 342                 {
 343                 const gchar *mark_uri;
 344                 gchar *mark_app;
 345                 gchar *mark_mtime;
 346                 gchar *pathl;
 347                 gint success;
 348
 349                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 350
 351                 mark_app = g_strdup_printf("%s %s", GQ_APPNAME, VERSION);
 352                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 353
 354                 pathl = path_from_utf8(tmp_path);
 355                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 356                                           THUMB_MARKER_URI, mark_uri,
 357                                           THUMB_MARKER_MTIME, mark_mtime,
 358                                           THUMB_MARKER_APP, mark_app,
 359                                           NULL);
 360                 if (success)
 361                         {
 362                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 363                         success = rename_file(tmp_path, tl->thumb_path);
 364                         }
 365
 366                 g_free(pathl);
 367
 368                 g_free(mark_mtime);
 369                 g_free(mark_app);
 370
 371                 g_free(tmp_path);
 372                 if (!success)
 373                         {
 374                         DEBUG_1("thumb save failed: %s", tl->source_path);
 375                         DEBUG_1("            thumb: %s", tl->thumb_path);
 376                         }
 377
 378                 }
 379
 380         g_object_unref(G_OBJECT(pixbuf));
 381 }
 382
 383 static gint thumb_loader_std_scale_aspect(gint req_w, gint req_h, gint old_w, gint old_h,
 384                                           gint *new_w, gint *new_h)
 385 {
 386         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 387                 {
 388                 *new_w = req_w;
 389                 *new_h = (gdouble)*new_w / old_w * old_h;
 390                 if (*new_h < 1) *new_h = 1;
 391                 }
 392         else
 393                 {
 394                 *new_h = req_h;
 395                 *new_w = (gdouble)*new_h / old_h * old_w;
 396                 if (*new_w < 1) *new_w = 1;
 397                 }
 398
 399         return (*new_w != old_w || *new_h != old_h);
 400 }
 401
 402 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf, gint shrunk)
 403 {
 404         GdkPixbuf *pixbuf_thumb = NULL;
 405         GdkPixbuf *result;
 406         gint sw, sh;
 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 (thumb_loader_std_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->source_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 (thumb_loader_std_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
 493         return result;
 494 }
 495
 496 static gint thumb_loader_std_next_source(ThumbLoaderStd *tl, gint remove_broken)
 497 {
 498         image_loader_free(tl->il);
 499         tl->il = NULL;
 500
 501         if (tl->thumb_path)
 502                 {
 503                 if (!tl->thumb_path_local && remove_broken)
 504                         {
 505                         DEBUG_1("thumb broken, unlinking: %s", tl->thumb_path);
 506                         unlink_file(tl->thumb_path);
 507                         }
 508
 509                 g_free(tl->thumb_path);
 510                 tl->thumb_path = NULL;
 511
 512                 if (!tl->thumb_path_local)
 513                         {
 514                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 515                         if (isfile(tl->thumb_path) && thumb_loader_std_setup(tl, tl->thumb_path))
 516                                 {
 517                                 tl->thumb_path_local = TRUE;
 518                                 return TRUE;
 519                                 }
 520
 521                         g_free(tl->thumb_path);
 522                         tl->thumb_path = NULL;
 523                         }
 524
 525                 if (thumb_loader_std_setup(tl, tl->source_path)) return TRUE;
 526                 }
 527
 528         thumb_loader_std_save(tl, NULL);
 529         return FALSE;
 530 }
 531
 532 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 533 {
 534         ThumbLoaderStd *tl = data;
 535         GdkPixbuf *pixbuf;
 536
 537         DEBUG_1("thumb image done: %s", tl->source_path);
 538         DEBUG_1("            from: %s", tl->il->path);
 539
 540         pixbuf = image_loader_get_pixbuf(tl->il);
 541         if (!pixbuf)
 542                 {
 543                 DEBUG_1("...but no pixbuf");
 544                 thumb_loader_std_error_cb(il, data);
 545                 return;
 546                 }
 547
 548         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 549                 {
 550                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 551
 552                 if (tl->func_error) tl->func_error(tl, tl->data);
 553                 return;
 554                 }
 555
 556         tl->cache_hit = (tl->thumb_path != NULL);
 557
 558         tl->pixbuf = thumb_loader_std_finish(tl, pixbuf, il->shrunk);
 559
 560         if (tl->func_done) tl->func_done(tl, tl->data);
 561 }
 562
 563 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 564 {
 565         ThumbLoaderStd *tl = data;
 566
 567         /* if at least some of the image is available, go to done */
 568         if (image_loader_get_pixbuf(tl->il) != NULL)
 569                 {
 570                 thumb_loader_std_done_cb(il, data);
 571                 return;
 572                 }
 573
 574         DEBUG_1("thumb image error: %s", tl->source_path);
 575         DEBUG_1("             from: %s", tl->il->fd->path);
 576
 577         if (thumb_loader_std_next_source(tl, TRUE)) return;
 578
 579         if (tl->func_error) tl->func_error(tl, tl->data);
 580 }
 581
 582 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 583 {
 584         ThumbLoaderStd *tl = data;
 585
 586         tl->progress = (gdouble)percent;
 587
 588         if (tl->func_progress) tl->func_progress(tl, tl->data);
 589 }
 590
 591 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path)
 592 {
 593         tl->il = image_loader_new_from_path(path);
 594
 595         if (options->thumbnails.fast)
 596                 {
 597                 /* this will speed up jpegs by up to 3x in some cases */
 598                 if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 599                     tl->requested_height <= THUMB_SIZE_NORMAL)
 600                         {
 601                         image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 602                         }
 603                 else
 604                         {
 605                         image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 606                         }
 607                 }
 608
 609         image_loader_set_error_func(tl->il, thumb_loader_std_error_cb, tl);
 610         if (tl->func_progress)
 611                 {
 612                 image_loader_set_percent_func(tl->il, thumb_loader_std_progress_cb, tl);
 613                 }
 614
 615         if (image_loader_start(tl->il, thumb_loader_std_done_cb, tl))
 616                 {
 617                 return TRUE;
 618                 }
 619
 620         image_loader_free(tl->il);
 621         tl->il = NULL;
 622         return FALSE;
 623 }
 624
 625 /*
 626  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 627  *       a valid existing thumb is found anywhere the local thumb will not be created.
 628  */
 629 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gint enable_cache, gint local, gint retry_failed)
 630 {
 631         if (!tl) return;
 632
 633         tl->cache_enable = enable_cache;
 634         tl->cache_local = local;
 635         tl->cache_retry = retry_failed;
 636 }
 637
 638 gint thumb_loader_std_start(ThumbLoaderStd *tl, const gchar *path)
 639 {
 640         static gchar *thumb_cache = NULL;
 641         struct stat st;
 642
 643         if (!tl || !path) return FALSE;
 644
 645         thumb_loader_std_reset(tl);
 646
 647         if (!stat_utf8(path, &st)) return FALSE;
 648
 649         tl->source_path = g_strdup(path);
 650         tl->source_mtime = st.st_mtime;
 651         tl->source_size = st.st_size;
 652         tl->source_mode = st.st_mode;
 653
 654         if (!thumb_cache) thumb_cache = g_strconcat(homedir(), "/", THUMB_FOLDER_GLOBAL, NULL);
 655         if (strncmp(tl->source_path, thumb_cache, strlen(thumb_cache)) != 0)
 656                 {
 657                 gchar *pathl;
 658
 659                 pathl = path_from_utf8(path);
 660                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 661                 tl->local_uri = filename_from_path(tl->thumb_uri);
 662                 g_free(pathl);
 663                 }
 664
 665         if (tl->cache_enable)
 666                 {
 667                 gint found;
 668
 669                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 670                 tl->thumb_path_local = FALSE;
 671
 672                 found = isfile(tl->thumb_path);
 673                 if (found && thumb_loader_std_setup(tl, tl->thumb_path)) return TRUE;
 674
 675                 if (thumb_loader_std_fail_check(tl)) return FALSE;
 676
 677                 return thumb_loader_std_next_source(tl, found);
 678                 }
 679
 680         if (!thumb_loader_std_setup(tl, tl->source_path))
 681                 {
 682                 thumb_loader_std_save(tl, NULL);
 683                 return FALSE;
 684                 }
 685
 686         return TRUE;
 687 }
 688
 689 void thumb_loader_std_free(ThumbLoaderStd *tl)
 690 {
 691         if (!tl) return;
 692
 693         thumb_loader_std_reset(tl);
 694         g_free(tl);
 695 }
 696
 697 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl, gint with_fallback)
 698 {
 699         GdkPixbuf *pixbuf;
 700
 701         if (tl && tl->pixbuf)
 702                 {
 703                 pixbuf = tl->pixbuf;
 704                 g_object_ref(pixbuf);
 705                 }
 706         else if (with_fallback)
 707                 {
 708                 gint w, h;
 709
 710                 pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 711                 w = gdk_pixbuf_get_width(pixbuf);
 712                 h = gdk_pixbuf_get_height(pixbuf);
 713
 714                 if (w > tl->requested_width || h > tl->requested_height)
 715                         {
 716                         gint nw, nh;
 717
 718                         if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height,
 719                                                           w, h, &nw, &nh))
 720                                 {
 721                                 GdkPixbuf *tmp;
 722
 723                                 tmp = pixbuf;
 724                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 725                                 g_object_unref(G_OBJECT(tmp));
 726                                 }
 727                         }
 728                 }
 729         else
 730                 {
 731                 pixbuf = NULL;
 732                 }
 733
 734         return pixbuf;
 735 }
 736
 737
 738 typedef struct _ThumbValidate ThumbValidate;
 739 struct _ThumbValidate
 740 {
 741         ThumbLoaderStd *tl;
 742         gchar *path;
 743         gint days;
 744
 745         void (*func_valid)(const gchar *path, gint valid, gpointer data);
 746         gpointer data;
 747
 748         gint idle_id;
 749 };
 750
 751 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 752 {
 753         thumb_loader_std_free(tv->tl);
 754         g_free(tv->path);
 755         g_free(tv);
 756 }
 757
 758 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 759 {
 760         ThumbValidate *tv;
 761
 762         if (!tl) return;
 763
 764         tv = tl->data;
 765
 766         if (tv->idle_id != -1) g_source_remove(tv->idle_id);
 767         tv->idle_id = -1;
 768
 769         thumb_loader_std_thumb_file_validate_free(tv);
 770 }
 771
 772 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gint valid)
 773 {
 774         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 775
 776         thumb_loader_std_thumb_file_validate_free(tv);
 777 }
 778
 779 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 780 {
 781         ThumbValidate *tv = data;
 782         GdkPixbuf *pixbuf;
 783         gint valid = FALSE;
 784
 785         pixbuf = thumb_loader_std_get_pixbuf(tv->tl, FALSE);
 786         if (pixbuf)
 787                 {
 788                 const gchar *uri;
 789                 const gchar *mtime_str;
 790
 791                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 792                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 793                 if (uri && mtime_str)
 794                         {
 795                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 796                                 {
 797                                 struct stat st;
 798                                 gchar *target;
 799
 800                                 target = g_filename_from_uri(uri, NULL, NULL);
 801                                 if (stat(target, &st) == 0 &&
 802                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 803                                         {
 804                                         valid = TRUE;
 805                                         }
 806                                 g_free(target);
 807                                 }
 808                         else
 809                                 {
 810                                 struct stat st;
 811
 812                                 DEBUG_1("thumb uri foreign, doing day check: %s", uri);
 813
 814                                 if (stat_utf8(tv->path, &st))
 815                                         {
 816                                         time_t now;
 817
 818                                         now = time(NULL);
 819                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 820                                                 {
 821                                                 valid = TRUE;
 822                                                 }
 823                                         }
 824                                 }
 825                         }
 826
 827                 g_object_unref(pixbuf);
 828                 }
 829
 830         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 831 }
 832
 833 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 834 {
 835         ThumbValidate *tv = data;
 836
 837         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 838 }
 839
 840 static gint thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 841 {
 842         ThumbValidate *tv = data;
 843
 844         tv->idle_id = -1;
 845         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 846
 847         return FALSE;
 848 }
 849
 850 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 851                                                      void (*func_valid)(const gchar *path, gint valid, gpointer data),
 852                                                      gpointer data)
 853 {
 854         ThumbValidate *tv;
 855
 856         tv = g_new0(ThumbValidate, 1);
 857
 858         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 859         thumb_loader_std_set_callbacks(tv->tl,
 860                                        thumb_loader_std_thumb_file_validate_done_cb,
 861                                        thumb_loader_std_thumb_file_validate_error_cb,
 862                                        NULL,
 863                                        tv);
 864         thumb_loader_std_reset(tv->tl);
 865
 866         tv->path = g_strdup(thumb_path);
 867         tv->days = allowed_days;
 868         tv->func_valid = func_valid;
 869         tv->data = data;
 870
 871         if (!thumb_loader_std_setup(tv->tl, thumb_path))
 872                 {
 873                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 874                 }
 875         else
 876                 {
 877                 tv->idle_id = -1;
 878                 }
 879
 880         return tv->tl;
 881 }
 882
 883 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gint local,
 884                                        const gchar *subfolder)
 885 {
 886         gchar *thumb_path;
 887
 888         thumb_path = thumb_std_cache_path(source,
 889                                           (local) ? filename_from_path(uri) : uri,
 890                                           local, subfolder);
 891         if (isfile(thumb_path))
 892                 {
 893                 DEBUG_1("thumb removing: %s", thumb_path);
 894                 unlink_file(thumb_path);
 895                 }
 896         g_free(thumb_path);
 897 }
 898
 899 /* this also removes local thumbnails (the source is gone so it makes sense) */
 900 void thumb_std_maint_removed(const gchar *source)
 901 {
 902         gchar *uri;
 903         gchar *sourcel;
 904
 905         sourcel = path_from_utf8(source);
 906         uri = g_filename_to_uri(sourcel, NULL, NULL);
 907         g_free(sourcel);
 908
 909         /* all this to remove a thumbnail? */
 910
 911         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 912         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 913         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 914         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 915         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 916
 917         g_free(uri);
 918 }
 919
 920 typedef struct _TMaintMove TMaintMove;
 921 struct _TMaintMove
 922 {
 923         gchar *source;
 924         gchar *dest;
 925
 926         ThumbLoaderStd *tl;
 927         gchar *source_uri;
 928         gchar *thumb_path;
 929
 930         gint pass;
 931 };
 932
 933 static GList *thumb_std_maint_move_list = NULL;
 934 static GList *thumb_std_maint_move_tail = NULL;
 935
 936
 937 static void thumb_std_maint_move_step(TMaintMove *tm);
 938 static gint thumb_std_maint_move_idle(gpointer data);
 939
 940
 941 static void thumb_std_maint_move_validate_cb(const gchar *path, gint valid, gpointer data)
 942 {
 943         TMaintMove *tm = data;
 944         GdkPixbuf *pixbuf;
 945
 946         pixbuf = thumb_loader_std_get_pixbuf(tm->tl, FALSE);
 947         if (pixbuf)
 948                 {
 949                 const gchar *uri;
 950                 const gchar *mtime_str;
 951
 952                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 953                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 954
 955                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 956                         {
 957                         gchar *pathl;
 958
 959                         /* The validation utility abuses ThumbLoader, and we
 960                          * abuse the utility just to load the thumbnail,
 961                          * but the loader needs to look sane for the save to complete.
 962                          */
 963
 964                         tm->tl->cache_enable = TRUE;
 965                         tm->tl->cache_hit = FALSE;
 966                         tm->tl->cache_local = FALSE;
 967
 968                         g_free(tm->tl->source_path);
 969                         tm->tl->source_path = g_strdup(tm->dest);
 970                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
 971
 972                         pathl = path_from_utf8(tm->tl->source_path);
 973                         g_free(tm->tl->thumb_uri);
 974                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 975                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
 976                         g_free(pathl);
 977
 978                         g_free(tm->tl->thumb_path);
 979                         tm->tl->thumb_path = NULL;
 980                         tm->tl->thumb_path_local = FALSE;
 981
 982                         DEBUG_1("thumb move attempting save:");
 983
 984                         thumb_loader_std_save(tm->tl, pixbuf);
 985                         }
 986
 987                 DEBUG_1("thumb move unlink: %s", tm->thumb_path);
 988                 unlink_file(tm->thumb_path);
 989                 }
 990
 991         thumb_std_maint_move_step(tm);
 992 }
 993
 994 static void thumb_std_maint_move_step(TMaintMove *tm)
 995 {
 996         const gchar *folder;
 997
 998         tm->pass++;
 999         if (tm->pass > 2)
1000                 {
1001                 g_free(tm->source);
1002                 g_free(tm->dest);
1003                 g_free(tm->source_uri);
1004                 g_free(tm->thumb_path);
1005                 g_free(tm);
1006
1007                 if (thumb_std_maint_move_list)
1008                         {
1009                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1010                         }
1011
1012                 return;
1013                 }
1014
1015         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1016
1017         g_free(tm->thumb_path);
1018         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1019         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1020                                                       thumb_std_maint_move_validate_cb, tm);
1021 }
1022
1023 static gint thumb_std_maint_move_idle(gpointer data)
1024 {
1025         TMaintMove *tm;
1026         gchar *pathl;
1027
1028         if (!thumb_std_maint_move_list) return FALSE;
1029
1030         tm = thumb_std_maint_move_list->data;
1031
1032         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1033         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1034
1035         pathl = path_from_utf8(tm->source);
1036         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1037         g_free(pathl);
1038
1039         tm->pass = 0;
1040
1041         thumb_std_maint_move_step(tm);
1042
1043         return FALSE;
1044 }
1045
1046 /* This will schedule a move of the thumbnail for source image to dest when idle.
1047  * We do this so that file renaming or moving speed is not sacrificed by
1048  * moving the thumbnails at the same time because:
1049  *
1050  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1051  *
1052  * The thumbnails are processed when the app is idle. If the app
1053  * exits early well too bad - they can simply be regenerated from scratch.
1054  *
1055  * This does not manage local thumbnails (fixme ?)
1056  */
1057 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1058 {
1059         TMaintMove *tm;
1060
1061         tm = g_new0(TMaintMove, 1);
1062         tm->source = g_strdup(source);
1063         tm->dest = g_strdup(dest);
1064
1065         if (!thumb_std_maint_move_list)
1066                 {
1067                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1068                 }
1069
1070         thumb_std_maint_move_tail = g_list_append(thumb_std_maint_move_tail, tm);
1071         if (!thumb_std_maint_move_list)
1072                 thumb_std_maint_move_list = thumb_std_maint_move_tail;
1073         thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1074 }