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