src/thumb_standard.c

   1 /*
   2  * GQview
   3  * (C) 2005 John Ellis
   4  *
   5  * Author: John Ellis
   6  *
   7  * This software is released under the GNU General Public License (GNU GPL).
   8  * Please read the included file COPYING for more information.
   9  * This software comes with no warranty of any kind, use at your own risk!
  10  */
  11
  12
  13 #include "gqview.h"
  14 #include "thumb_standard.h"
  15
  16 #include "cache.h"      /* for cache_ensure_dir_exists */
  17 #include "image-load.h"
  18 #include "md5-util.h"
  19 #include "pixbuf_util.h"
  20 #include "ui_fileops.h"
  21
  22
  23 /*
  24  * This thumbnail caching implementation attempts to conform
  25  * to the Thumbnail Managing Standard proposed on freedesktop.org
  26  * The standard is documented here:
  27  *   http://triq.net/~jens/thumbnail-spec/index.html
  28  *  (why isn't it actually hosted on freedesktop.org?)
  29  *
  30  * This code attempts to conform to version 0.7.0 of the standard.
  31  *
  32  * Notes:
  33  *   > Validation of the thumb's embedded uri is a simple strcmp between our
  34  *     version of the escaped uri and the thumb's escaped uri. But not all uri
  35  *     escape functions escape the same set of chars, comparing the unescaped
  36  *     versions may be more accurate.
  37  *   > Only Thumb::URI and Thumb::MTime are stored in a thumb at this time.
  38  *     Storing the Size, Width, Height should probably be implemented.
  39  */
  40
  41
  42 #define THUMB_SIZE_NORMAL 128
  43 #define THUMB_SIZE_LARGE  256
  44
  45 #define THUMB_MARKER_URI    "tEXt::Thumb::URI"
  46 #define THUMB_MARKER_MTIME  "tEXt::Thumb::MTime"
  47 #define THUMB_MARKER_SIZE   "tEXt::Thumb::Size"
  48 #define THUMB_MARKER_WIDTH  "tEXt::Thumb::Image::Width"
  49 #define THUMB_MARKER_HEIGHT "tEXt::Thumb::Image::Height"
  50 #define THUMB_MARKER_APP    "tEXt::Software"
  51
  52 #define THUMB_PERMS_FOLDER 0700
  53 #define THUMB_PERMS_THUMB  0600
  54
  55
  56
  57 /*
  58  *-----------------------------------------------------------------------------
  59  * thumbnail loader
  60  *-----------------------------------------------------------------------------
  61  */
  62
  63
  64 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data);
  65 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path);
  66
  67
  68 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  69 {
  70         ThumbLoaderStd *tl;
  71
  72         tl = g_new0(ThumbLoaderStd, 1);
  73
  74         tl->standard_loader = TRUE;
  75
  76         tl->requested_width = width;
  77         tl->requested_height = height;
  78
  79         tl->pixbuf = NULL;
  80         tl->il = NULL;
  81         tl->source_path = NULL;
  82
  83         tl->cache_enable = enable_thumb_caching;
  84         tl->cache_local = FALSE;
  85         tl->cache_retry = FALSE;
  86
  87         return tl;
  88 }
  89
  90 void thumb_loader_std_set_callbacks(ThumbLoaderStd *tl,
  91                                     ThumbLoaderStdFunc func_done,
  92                                     ThumbLoaderStdFunc func_error,
  93                                     ThumbLoaderStdFunc func_progress,
  94                                     gpointer data)
  95 {
  96         if (!tl) return;
  97
  98         tl->func_done = func_done;
  99         tl->func_error = func_error;
 100         tl->func_progress = func_progress;
 101         tl->data = data;
 102 }
 103
 104 static void thumb_loader_std_reset(ThumbLoaderStd *tl)
 105 {
 106         if (tl->pixbuf) g_object_unref(tl->pixbuf);
 107         tl->pixbuf = NULL;
 108
 109         image_loader_free(tl->il);
 110         tl->il = NULL;
 111
 112         g_free(tl->source_path);
 113         tl->source_path = NULL;
 114
 115         g_free(tl->thumb_path);
 116         tl->thumb_path = NULL;
 117
 118         g_free(tl->thumb_uri);
 119         tl->thumb_uri = NULL;
 120         tl->local_uri = NULL;
 121
 122         tl->thumb_path_local = FALSE;
 123
 124         tl->cache_hit = FALSE;
 125
 126         tl->source_mtime = 0;
 127         tl->source_size = 0;
 128         tl->source_mode = 0;
 129
 130         tl->progress = 0.0;
 131 }
 132
 133 static gchar *thumb_std_cache_path(const gchar *path, const gchar *uri, gint local,
 134                                    const gchar *cache_subfolder)
 135 {
 136         gchar *result = NULL;
 137         gchar *cache_base;
 138         gchar *md5_text;
 139         guchar digest[16];
 140
 141         if (!path || !uri || !cache_subfolder) return NULL;
 142
 143         if (local)
 144                 {
 145                 gchar *base;
 146
 147                 base = remove_level_from_path(path);
 148                 cache_base = g_strconcat(base, "/", THUMB_FOLDER, "/", cache_subfolder, NULL);
 149                 g_free(base);
 150                 }
 151         else
 152                 {
 153                 cache_base = g_strconcat(homedir(), "/", THUMB_FOLDER, "/", cache_subfolder, NULL);
 154                 }
 155
 156         md5_get_digest(uri, strlen(uri), digest);
 157         md5_text = md5_digest_to_text(digest);
 158
 159         if (cache_base && md5_text)
 160                 {
 161                 result = g_strconcat(cache_base, "/", md5_text, THUMB_NAME_EXTENSION, NULL);
 162                 }
 163
 164         g_free(cache_base);
 165         g_free(md5_text);
 166
 167         return result;
 168 }
 169
 170 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gint local, GdkPixbuf *pixbuf, gint fail)
 171 {
 172 #if 0
 173         gchar *result = NULL;
 174         gchar *cache_base;
 175 #endif
 176         const gchar *folder_size;
 177 #if 0
 178         const gchar *uri;
 179         gchar *md5_text;
 180         guchar digest[16];
 181 #endif
 182         gint w, h;
 183
 184         if (!tl->source_path || !tl->thumb_uri) return NULL;
 185
 186         if (pixbuf)
 187                 {
 188                 w = gdk_pixbuf_get_width(pixbuf);
 189                 h = gdk_pixbuf_get_height(pixbuf);
 190                 }
 191         else
 192                 {
 193                 w = tl->requested_width;
 194                 h = tl->requested_height;
 195                 }
 196
 197         if (fail)
 198                 {
 199                 folder_size = THUMB_FOLDER_FAIL;
 200                 }
 201         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 202                 {
 203                 folder_size = THUMB_FOLDER_LARGE;
 204                 }
 205         else
 206                 {
 207                 folder_size = THUMB_FOLDER_NORMAL;
 208                 }
 209
 210         return thumb_std_cache_path(tl->source_path,
 211                                     (local) ?  tl->local_uri : tl->thumb_uri,
 212                                     local, folder_size);
 213
 214 #if 0
 215         if (local)
 216                 {
 217                 gchar *base;
 218
 219                 base = remove_level_from_path(tl->source_path);
 220                 cache_base = g_strconcat(base, "/", THUMB_FOLDER, "/", folder_size, NULL);
 221                 g_free(base);
 222                 }
 223         else
 224                 {
 225                 cache_base = g_strconcat(homedir(), "/", THUMB_FOLDER, "/", folder_size, NULL);
 226                 }
 227
 228         uri = (local) ? tl->local_uri : tl->thumb_uri;
 229         md5_get_digest(uri, strlen(uri), digest);
 230         md5_text = md5_digest_to_text(digest);
 231
 232         if (cache_base && md5_text)
 233                 {
 234                 result = g_strconcat(cache_base, "/", md5_text, THUMB_NAME_EXTENSION, NULL);
 235                 }
 236
 237         g_free(cache_base);
 238         g_free(md5_text);
 239
 240         return result;
 241 #endif
 242 }
 243
 244 static gint thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 245 {
 246         gchar *fail_path;
 247         gint result = FALSE;
 248
 249         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 250         if (isfile(fail_path))
 251                 {
 252                 GdkPixbuf *pixbuf;
 253
 254                 if (tl->cache_retry)
 255                         {
 256                         pixbuf = NULL;
 257                         }
 258                 else
 259                         {
 260                         gchar *pathl;
 261
 262                         pathl = path_from_utf8(fail_path);
 263                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 264                         g_free(pathl);
 265                         }
 266
 267                 if (pixbuf)
 268                         {
 269                         const gchar *mtime_str;
 270
 271                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 272                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 273                                 {
 274                                 result = TRUE;
 275                                 if (debug)
 276                                         {
 277                                         printf("thumb fail valid: %s\n", tl->source_path);
 278                                         printf("           thumb: %s\n", fail_path);
 279                                         }
 280                                 }
 281
 282                         g_object_unref(G_OBJECT(pixbuf));
 283                         }
 284
 285                 if (!result) unlink_file(fail_path);
 286                 }
 287         g_free(fail_path);
 288
 289         return result;
 290 }
 291
 292 static gint thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 293 {
 294         const gchar *valid_uri;
 295         const gchar *uri;
 296         const gchar *mtime_str;
 297         time_t mtime;
 298         gint w, h;
 299
 300         if (!pixbuf) return FALSE;
 301
 302         w = gdk_pixbuf_get_width(pixbuf);
 303         h = gdk_pixbuf_get_height(pixbuf);
 304
 305         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 306             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 307
 308         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 309
 310         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 311         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 312
 313         if (!mtime_str || !uri || !valid_uri) return FALSE;
 314         if (strcmp(uri, valid_uri) != 0) return FALSE;
 315
 316         mtime = strtol(mtime_str, NULL, 10);
 317         if (tl->source_mtime != mtime) return FALSE;
 318
 319         return TRUE;
 320 }
 321
 322 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 323 {
 324         gchar *base_path;
 325         gchar *tmp_path;
 326         gint fail;
 327
 328         if (!tl->cache_enable || tl->cache_hit) return;
 329         if (tl->thumb_path) return;
 330
 331         if (!pixbuf)
 332                 {
 333                 /* local failures are not stored */
 334                 if (tl->cache_local) return;
 335
 336                 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 337                 fail = TRUE;
 338                 }
 339         else
 340                 {
 341                 g_object_ref(G_OBJECT(pixbuf));
 342                 fail = FALSE;
 343                 }
 344
 345         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 346         if (!tl->thumb_path)
 347                 {
 348                 g_object_unref(G_OBJECT(pixbuf));
 349                 return;
 350                 }
 351         tl->thumb_path_local = tl->cache_local;
 352
 353         /* create thumbnail dir if needed */
 354         base_path = remove_level_from_path(tl->thumb_path);
 355         if (tl->cache_local)
 356                 {
 357                 if (!isdir(base_path))
 358                         {
 359                         struct stat st;
 360                         gchar *source_base;
 361
 362                         source_base = remove_level_from_path(tl->source_path);
 363                         if (stat_utf8(source_base, &st))
 364                                 {
 365                                 cache_ensure_dir_exists(base_path, st.st_mode);
 366                                 }
 367                         g_free(source_base);
 368                         }
 369                 }
 370         else
 371                 {
 372                 cache_ensure_dir_exists(base_path, THUMB_PERMS_FOLDER);
 373                 }
 374         g_free(base_path);
 375
 376         if (debug)
 377                 {
 378                 printf("thumb saving: %s\n", tl->source_path);
 379                 printf("       saved: %s\n", tl->thumb_path);
 380                 }
 381
 382         /* save thumb, using a temp file then renaming into place */
 383         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 384         if (tmp_path)
 385                 {
 386                 const gchar *mark_uri;
 387                 gchar *mark_app;
 388                 gchar *mark_mtime;
 389                 gchar *pathl;
 390                 gint success;
 391
 392                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 393
 394                 mark_app = g_strdup_printf("GQview %s", VERSION);
 395                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 396
 397                 pathl = path_from_utf8(tmp_path);
 398                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 399                                           THUMB_MARKER_URI, mark_uri,
 400                                           THUMB_MARKER_MTIME, mark_mtime,
 401                                           THUMB_MARKER_APP, mark_app,
 402                                           NULL);
 403                 if (success)
 404                         {
 405                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 406                         success = rename_file(tmp_path, tl->thumb_path);
 407                         }
 408
 409                 g_free(pathl);
 410
 411                 g_free(mark_mtime);
 412                 g_free(mark_app);
 413
 414                 g_free(tmp_path);
 415                 if (!success && debug)
 416                         {
 417                         printf("thumb save failed: %s\n", tl->source_path);
 418                         printf("            thumb: %s\n", tl->thumb_path);
 419                         }
 420
 421                 }
 422
 423         g_object_unref(G_OBJECT(pixbuf));
 424 }
 425
 426 static gint thumb_loader_std_scale_aspect(gint req_w, gint req_h, gint old_w, gint old_h,
 427                                           gint *new_w, gint *new_h)
 428 {
 429         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 430                 {
 431                 *new_w = req_w;
 432                 *new_h = (gdouble)*new_w / old_w * old_h;
 433                 if (*new_h < 1) *new_h = 1;
 434                 }
 435         else
 436                 {
 437                 *new_h = req_h;
 438                 *new_w = (gdouble)*new_h / old_h * old_w;
 439                 if (*new_w < 1) *new_w = 1;
 440                 }
 441
 442         return (*new_w != old_w || *new_h != old_h);
 443 }
 444
 445 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 446 {
 447         GdkPixbuf *pixbuf_thumb = NULL;
 448         GdkPixbuf *result;
 449         gint sw, sh;
 450
 451         sw = gdk_pixbuf_get_width(pixbuf);
 452         sh = gdk_pixbuf_get_height(pixbuf);
 453
 454         if (tl->cache_enable && !tl->cache_hit &&
 455             (sw >= THUMB_SIZE_NORMAL || sh >= THUMB_SIZE_NORMAL))
 456                 {
 457                 gint cache_w, cache_h;
 458                 gint thumb_w, thumb_h;
 459
 460                 if (tl->requested_width > THUMB_SIZE_NORMAL || tl->requested_height > THUMB_SIZE_NORMAL)
 461                         {
 462                         cache_w = cache_h = THUMB_SIZE_LARGE;
 463                         }
 464                 else
 465                         {
 466                         cache_w = cache_h = THUMB_SIZE_NORMAL;
 467                         }
 468
 469                 if (thumb_loader_std_scale_aspect(cache_w, cache_h, sw, sh,
 470                                                   &thumb_w, &thumb_h))
 471                         {
 472                         pixbuf_thumb = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 473                                                                (GdkInterpType)thumbnail_quality);
 474                         }
 475                 else
 476                         {
 477                         pixbuf_thumb = pixbuf;
 478                         g_object_ref(G_OBJECT(pixbuf_thumb));
 479                         }
 480
 481                 thumb_loader_std_save(tl, pixbuf_thumb);
 482                 }
 483         else if (tl->cache_enable && tl->cache_local &&
 484                  tl->cache_hit && !tl->thumb_path_local)
 485                 {
 486                 /* A local cache save was requested, but a valid thumb is in $HOME,
 487                  * so specifically save as a local thumbnail.
 488                  */
 489                 g_free(tl->thumb_path);
 490                 tl->thumb_path = NULL;
 491
 492                 tl->cache_hit = FALSE;
 493
 494                 if (debug) printf("thumb copied: %s\n", tl->source_path);
 495
 496                 thumb_loader_std_save(tl, pixbuf);
 497                 }
 498
 499         if (sw <= tl->requested_width && sh <= tl->requested_height)
 500                 {
 501                 result = pixbuf;
 502                 g_object_ref(result);
 503                 }
 504         else
 505                 {
 506                 gint thumb_w, thumb_h;
 507
 508                 if (pixbuf_thumb)
 509                         {
 510                         pixbuf = pixbuf_thumb;
 511                         sw = gdk_pixbuf_get_width(pixbuf);
 512                         sh = gdk_pixbuf_get_height(pixbuf);
 513                         }
 514
 515                 if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height, sw, sh,
 516                                                   &thumb_w, &thumb_h))
 517                         {
 518                         result = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 519                                                          (GdkInterpType)thumbnail_quality);
 520                         }
 521                 else
 522                         {
 523                         result = pixbuf;
 524                         g_object_ref(result);
 525                         }
 526                 }
 527
 528         if (pixbuf_thumb) g_object_unref(pixbuf_thumb);
 529
 530         return result;
 531 }
 532
 533 static gint thumb_loader_std_next_source(ThumbLoaderStd *tl, gint remove_broken)
 534 {
 535         image_loader_free(tl->il);
 536         tl->il = NULL;
 537
 538         if (tl->thumb_path)
 539                 {
 540                 if (!tl->thumb_path_local && remove_broken)
 541                         {
 542                         if (debug) printf("thumb broken, unlinking: %s\n", tl->thumb_path);
 543                         unlink_file(tl->thumb_path);
 544                         }
 545
 546                 g_free(tl->thumb_path);
 547                 tl->thumb_path = NULL;
 548
 549                 if (!tl->thumb_path_local)
 550                         {
 551                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 552                         if (isfile(tl->thumb_path) && thumb_loader_std_setup(tl, tl->thumb_path))
 553                                 {
 554                                 tl->thumb_path_local = TRUE;
 555                                 return TRUE;
 556                                 }
 557
 558                         g_free(tl->thumb_path);
 559                         tl->thumb_path = NULL;
 560                         }
 561
 562                 if (thumb_loader_std_setup(tl, tl->source_path)) return TRUE;
 563                 }
 564
 565         thumb_loader_std_save(tl, NULL);
 566         return FALSE;
 567 }
 568
 569 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 570 {
 571         ThumbLoaderStd *tl = data;
 572         GdkPixbuf *pixbuf;
 573
 574         if (debug)
 575                 {
 576                 printf("thumb image done: %s\n", tl->source_path);
 577                 printf("            from: %s\n", tl->il->path);
 578                 }
 579
 580         pixbuf = image_loader_get_pixbuf(tl->il);
 581         if (!pixbuf)
 582                 {
 583                 if (debug) printf("...but no pixbuf\n");
 584                 thumb_loader_std_error_cb(il, data);
 585                 return;
 586                 }
 587
 588         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 589                 {
 590                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 591
 592                 if (tl->func_error) tl->func_error(tl, tl->data);
 593                 return;
 594                 }
 595
 596         tl->cache_hit = (tl->thumb_path != NULL);
 597
 598         tl->pixbuf = thumb_loader_std_finish(tl, pixbuf);
 599
 600         if (tl->func_done) tl->func_done(tl, tl->data);
 601 }
 602
 603 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 604 {
 605         ThumbLoaderStd *tl = data;
 606
 607         /* if at least some of the image is available, go to done */
 608         if (image_loader_get_pixbuf(tl->il) != NULL)
 609                 {
 610                 thumb_loader_std_done_cb(il, data);
 611                 return;
 612                 }
 613
 614         if (debug)
 615                 {
 616                 printf("thumb image error: %s\n", tl->source_path);
 617                 printf("             from: %s\n", tl->il->path);
 618                 }
 619
 620         if (thumb_loader_std_next_source(tl, TRUE)) return;
 621
 622         if (tl->func_error) tl->func_error(tl, tl->data);
 623 }
 624
 625 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 626 {
 627         ThumbLoaderStd *tl = data;
 628
 629         tl->progress = (gdouble)percent;
 630
 631         if (tl->func_progress) tl->func_progress(tl, tl->data);
 632 }
 633
 634 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, const gchar *path)
 635 {
 636         tl->il = image_loader_new(path);
 637
 638 #if 0
 639         /* this will speed up jpegs by up to 3x in some cases */
 640         if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 641             tl->requested_height <= THUMB_SIZE_NORMAL)
 642                 {
 643                 image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 644                 }
 645         else
 646                 {
 647                 image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 648                 }
 649 #endif
 650
 651         image_loader_set_error_func(tl->il, thumb_loader_std_error_cb, tl);
 652         if (tl->func_progress)
 653                 {
 654                 image_loader_set_percent_func(tl->il, thumb_loader_std_progress_cb, tl);
 655                 }
 656
 657         if (image_loader_start(tl->il, thumb_loader_std_done_cb, tl))
 658                 {
 659                 return TRUE;
 660                 }
 661
 662         image_loader_free(tl->il);
 663         tl->il = NULL;
 664         return FALSE;
 665 }
 666
 667 /*
 668  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 669  *       a valid existing thumb is found anywhere the local thumb will not be created.
 670  */
 671 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gint enable_cache, gint local, gint retry_failed)
 672 {
 673         if (!tl) return;
 674
 675         tl->cache_enable = enable_cache;
 676         tl->cache_local = local;
 677         tl->cache_retry = retry_failed;
 678 }
 679
 680 gint thumb_loader_std_start(ThumbLoaderStd *tl, const gchar *path)
 681 {
 682         static gchar *thumb_cache = NULL;
 683         struct stat st;
 684
 685         if (!tl || !path) return FALSE;
 686
 687         thumb_loader_std_reset(tl);
 688
 689         if (!stat_utf8(path, &st)) return FALSE;
 690
 691         tl->source_path = g_strdup(path);
 692         tl->source_mtime = st.st_mtime;
 693         tl->source_size = st.st_size;
 694         tl->source_mode = st.st_mode;
 695
 696         if (!thumb_cache) thumb_cache = g_strconcat(homedir(), "/", THUMB_FOLDER, NULL);
 697         if (strncmp(tl->source_path, thumb_cache, strlen(thumb_cache)) != 0)
 698                 {
 699                 gchar *pathl;
 700
 701                 pathl = path_from_utf8(path);
 702                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 703                 tl->local_uri = filename_from_path(tl->thumb_uri);
 704                 g_free(pathl);
 705                 }
 706
 707         if (tl->cache_enable)
 708                 {
 709                 gint found;
 710
 711                 if (thumb_loader_std_fail_check(tl)) return FALSE;
 712
 713                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 714                 tl->thumb_path_local = FALSE;
 715
 716                 found = isfile(tl->thumb_path);
 717                 if (found && thumb_loader_std_setup(tl, tl->thumb_path)) return TRUE;
 718
 719                 return thumb_loader_std_next_source(tl, found);
 720                 }
 721
 722         if (!thumb_loader_std_setup(tl, tl->source_path))
 723                 {
 724                 thumb_loader_std_save(tl, NULL);
 725                 return FALSE;
 726                 }
 727
 728         return TRUE;
 729 }
 730
 731 void thumb_loader_std_free(ThumbLoaderStd *tl)
 732 {
 733         if (!tl) return;
 734
 735         thumb_loader_std_reset(tl);
 736         g_free(tl);
 737 }
 738
 739 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl, gint with_fallback)
 740 {
 741         GdkPixbuf *pixbuf;
 742
 743         if (tl && tl->pixbuf)
 744                 {
 745                 pixbuf = tl->pixbuf;
 746                 g_object_ref(pixbuf);
 747                 }
 748         else if (with_fallback)
 749                 {
 750                 gint w, h;
 751
 752                 pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 753                 w = gdk_pixbuf_get_width(pixbuf);
 754                 h = gdk_pixbuf_get_height(pixbuf);
 755
 756                 if (w > tl->requested_width || h > tl->requested_height)
 757                         {
 758                         gint nw, nh;
 759
 760                         if (thumb_loader_std_scale_aspect(tl->requested_width, tl->requested_height,
 761                                                           w, h, &nw, &nh))
 762                                 {
 763                                 GdkPixbuf *tmp;
 764
 765                                 tmp = pixbuf;
 766                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 767                                 g_object_unref(G_OBJECT(tmp));
 768                                 }
 769                         }
 770                 }
 771         else
 772                 {
 773                 pixbuf = NULL;
 774                 }
 775
 776         return pixbuf;
 777 }
 778
 779
 780 typedef struct _ThumbValidate ThumbValidate;
 781 struct _ThumbValidate
 782 {
 783         ThumbLoaderStd *tl;
 784         gchar *path;
 785         gint days;
 786
 787         void (*func_valid)(const gchar *path, gint valid, gpointer data);
 788         gpointer data;
 789
 790         gint idle_id;
 791 };
 792
 793 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 794 {
 795         thumb_loader_std_free(tv->tl);
 796         g_free(tv->path);
 797         g_free(tv);
 798 }
 799
 800 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 801 {
 802         ThumbValidate *tv;
 803
 804         if (!tl) return;
 805
 806         tv = tl->data;
 807
 808         if (tv->idle_id != -1) g_source_remove(tv->idle_id);
 809         tv->idle_id = -1;
 810
 811         thumb_loader_std_thumb_file_validate_free(tv);
 812 }
 813
 814 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gint valid)
 815 {
 816         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 817
 818         thumb_loader_std_thumb_file_validate_free(tv);
 819 }
 820
 821 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 822 {
 823         ThumbValidate *tv = data;
 824         GdkPixbuf *pixbuf;
 825         gint valid = FALSE;
 826
 827         pixbuf = thumb_loader_std_get_pixbuf(tv->tl, FALSE);
 828         if (pixbuf)
 829                 {
 830                 const gchar *uri;
 831                 const gchar *mtime_str;
 832
 833                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 834                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 835                 if (uri && mtime_str)
 836                         {
 837                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 838                                 {
 839                                 struct stat st;
 840                                 gchar *target;
 841
 842                                 target = g_filename_from_uri(uri, NULL, NULL);
 843                                 if (stat(target, &st) == 0 &&
 844                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 845                                         {
 846                                         valid = TRUE;
 847                                         }
 848                                 g_free(target);
 849                                 }
 850                         else
 851                                 {
 852                                 struct stat st;
 853
 854                                 if (debug) printf("thumb uri foreign, doing day check: %s\n", uri);
 855
 856                                 if (stat_utf8(tv->path, &st))
 857                                         {
 858                                         time_t now;
 859
 860                                         now = time(NULL);
 861                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 862                                                 {
 863                                                 valid = TRUE;
 864                                                 }
 865                                         }
 866                                 }
 867                         }
 868
 869                 g_object_unref(pixbuf);
 870                 }
 871
 872         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 873 }
 874
 875 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 876 {
 877         ThumbValidate *tv = data;
 878
 879         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 880 }
 881
 882 static gint thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 883 {
 884         ThumbValidate *tv = data;
 885
 886         tv->idle_id = -1;
 887         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 888
 889         return FALSE;
 890 }
 891
 892 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 893                                                      void (*func_valid)(const gchar *path, gint valid, gpointer data),
 894                                                      gpointer data)
 895 {
 896         ThumbValidate *tv;
 897
 898         tv = g_new0(ThumbValidate, 1);
 899
 900         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 901         thumb_loader_std_set_callbacks(tv->tl,
 902                                        thumb_loader_std_thumb_file_validate_done_cb,
 903                                        thumb_loader_std_thumb_file_validate_error_cb,
 904                                        NULL,
 905                                        tv);
 906         thumb_loader_std_reset(tv->tl);
 907
 908         tv->path = g_strdup(thumb_path);
 909         tv->days = allowed_days;
 910         tv->func_valid = func_valid;
 911         tv->data = data;
 912
 913         if (!thumb_loader_std_setup(tv->tl, thumb_path))
 914                 {
 915                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 916                 }
 917         else
 918                 {
 919                 tv->idle_id = -1;
 920                 }
 921
 922         return tv->tl;
 923 }
 924
 925 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gint local,
 926                                        const gchar *subfolder)
 927 {
 928         gchar *thumb_path;
 929
 930         thumb_path = thumb_std_cache_path(source,
 931                                           (local) ? filename_from_path(uri) : uri,
 932                                           local, subfolder);
 933         if (isfile(thumb_path))
 934                 {
 935                 if (debug) printf("thumb removing: %s\n", thumb_path);
 936                 unlink_file(thumb_path);
 937                 }
 938         g_free(thumb_path);
 939 }
 940
 941 /* this also removes local thumbnails (the source is gone so it makes sense) */
 942 void thumb_std_maint_removed(const gchar *source)
 943 {
 944         gchar *uri;
 945         gchar *sourcel;
 946
 947         sourcel = path_from_utf8(source);
 948         uri = g_filename_to_uri(sourcel, NULL, NULL);
 949         g_free(sourcel);
 950
 951         /* all this to remove a thumbnail? */
 952
 953         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 954         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 955         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 956         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 957         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 958
 959         g_free(uri);
 960 }
 961
 962 typedef struct _TMaintMove TMaintMove;
 963 struct _TMaintMove
 964 {
 965         gchar *source;
 966         gchar *dest;
 967
 968         ThumbLoaderStd *tl;
 969         gchar *source_uri;
 970         gchar *thumb_path;
 971
 972         gint pass;
 973 };
 974
 975 static GList *thumb_std_maint_move_list = NULL;
 976 static GList *thumb_std_maint_move_tail = NULL;
 977
 978
 979 static void thumb_std_maint_move_step(TMaintMove *tm);
 980 static gint thumb_std_maint_move_idle(gpointer data);
 981
 982
 983 static void thumb_std_maint_move_validate_cb(const gchar *path, gint valid, gpointer data)
 984 {
 985         TMaintMove *tm = data;
 986         GdkPixbuf *pixbuf;
 987
 988         pixbuf = thumb_loader_std_get_pixbuf(tm->tl, FALSE);
 989         if (pixbuf)
 990                 {
 991                 const gchar *uri;
 992                 const gchar *mtime_str;
 993
 994                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 995                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 996
 997                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 998                         {
 999                         gchar *pathl;
1000
1001                         /* The validation utility abuses ThumbLoader, and we
1002                          * abuse the utility just to load the thumbnail,
1003                          * but the loader needs to look sane for the save to complete.
1004                          */
1005
1006                         tm->tl->cache_enable = TRUE;
1007                         tm->tl->cache_hit = FALSE;
1008                         tm->tl->cache_local = FALSE;
1009
1010                         g_free(tm->tl->source_path);
1011                         tm->tl->source_path = g_strdup(tm->dest);
1012                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
1013
1014                         pathl = path_from_utf8(tm->tl->source_path);
1015                         g_free(tm->tl->thumb_uri);
1016                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
1017                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
1018                         g_free(pathl);
1019
1020                         g_free(tm->tl->thumb_path);
1021                         tm->tl->thumb_path = NULL;
1022                         tm->tl->thumb_path_local = FALSE;
1023
1024                         if (debug) printf("thumb move attempting save:\n");
1025
1026                         thumb_loader_std_save(tm->tl, pixbuf);
1027                         }
1028
1029                 if (debug) printf("thumb move unlink: %s\n", tm->thumb_path);
1030                 unlink_file(tm->thumb_path);
1031                 }
1032
1033         thumb_std_maint_move_step(tm);
1034 }
1035
1036 static void thumb_std_maint_move_step(TMaintMove *tm)
1037 {
1038         const gchar *folder;
1039
1040         tm->pass++;
1041         if (tm->pass > 2)
1042                 {
1043                 g_free(tm->source);
1044                 g_free(tm->dest);
1045                 g_free(tm->source_uri);
1046                 g_free(tm->thumb_path);
1047                 g_free(tm);
1048
1049                 if (thumb_std_maint_move_list)
1050                         {
1051                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1052                         }
1053
1054                 return;
1055                 }
1056
1057         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1058
1059         g_free(tm->thumb_path);
1060         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1061         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1062                                                       thumb_std_maint_move_validate_cb, tm);
1063 }
1064
1065 static gint thumb_std_maint_move_idle(gpointer data)
1066 {
1067         TMaintMove *tm;
1068         gchar *pathl;
1069
1070         if (!thumb_std_maint_move_list) return FALSE;
1071
1072         tm = thumb_std_maint_move_list->data;
1073
1074         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1075         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1076
1077         pathl = path_from_utf8(tm->source);
1078         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1079         g_free(pathl);
1080
1081         tm->pass = 0;
1082
1083         thumb_std_maint_move_step(tm);
1084
1085         return FALSE;
1086 }
1087
1088 /* This will schedule a move of the thumbnail for source image to dest when idle.
1089  * We do this so that file renaming or moving speed is not sacrificed by
1090  * moving the thumbnails at the same time because:
1091  *
1092  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1093  *
1094  * The thumbnails are processed when the app is idle. If the app
1095  * exits early well too bad - they can simply be regenerated from scratch.
1096  *
1097  * This does not manage local thumbnails (fixme ?)
1098  */
1099 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1100 {
1101         TMaintMove *tm;
1102
1103         tm = g_new0(TMaintMove, 1);
1104         tm->source = g_strdup(source);
1105         tm->dest = g_strdup(dest);
1106
1107         if (!thumb_std_maint_move_list)
1108                 {
1109                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1110                 }
1111
1112         if (thumb_std_maint_move_tail)
1113                 {
1114                 g_list_append(thumb_std_maint_move_tail, tm);
1115                 thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1116                 }
1117         else
1118                 {
1119                 thumb_std_maint_move_list = g_list_append(thumb_std_maint_move_list, tm);
1120                 thumb_std_maint_move_tail = thumb_std_maint_move_list;
1121                 }
1122 }
1123
1124