backend/comics/comics-document.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /*
   3  * Copyright (C) 2005, Teemu Tervo <teemu.tervo@gmx.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21
  22 #include <unistd.h>
  23 #include <string.h>
  24 #include <sys/wait.h>
  25 #include <stdlib.h>
  26 #include <errno.h>
  27
  28 #include <glib.h>
  29 #include <glib/gi18n-lib.h>
  30 #include <glib/gstdio.h>
  31 #include <gio/gio.h>
  32
  33 #include "comics-document.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-document-thumbnails.h"
  36 #include "ev-file-helpers.h"
  37
  38 struct _ComicsDocumentClass
  39 {
  40         EvDocumentClass parent_class;
  41 };
  42
  43 typedef enum
  44 {
  45         RARLABS,
  46         GNAUNRAR,
  47         UNZIP,
  48         P7ZIP
  49 } ComicBookDecompressType;
  50
  51 struct _ComicsDocument
  52 {
  53         EvDocument parent_instance;
  54
  55         gchar    *archive, *dir;
  56         GPtrArray *page_names;
  57         gchar    *selected_command;
  58         gchar    *extract_command, *list_command, *decompress_tmp;
  59         gboolean regex_arg;
  60         gint     offset;
  61         ComicBookDecompressType command_usage;
  62 };
  63
  64 #define OFFSET_7Z 53
  65 #define NO_OFFSET 0
  66
  67 /* For perfomance reasons of 7z* we've choosen to decompress on the temporary
  68  * directory instead of decompressing on the stdout */
  69
  70 struct {
  71         char *extract, *list, *decompress_tmp;
  72         gboolean regex_arg;
  73         gint offset;
  74 } command_usage_def[] = {
  75         {"%s p -c- -ierr", "%s vb -c- -- %s", NULL             , FALSE, NO_OFFSET},
  76         {NULL            , "%s t %s"        , "%s -xf %s %s"   , TRUE , NO_OFFSET},
  77         {"%s -p -C"      , "%s -Z -1 -- %s" , NULL             , TRUE , NO_OFFSET},
  78         {NULL            , "%s l -- %s"     , "%s x -y %s -o%s", FALSE, OFFSET_7Z}
  79 };
  80
  81
  82 typedef struct    _ComicsDocumentClass ComicsDocumentClass;
  83
  84 static void       comics_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  85
  86 static GSList*    get_supported_image_extensions (void);
  87 static void       get_page_size_area_prepared_cb (GdkPixbufLoader *loader,
  88                                                   gpointer data);
  89 static void       render_pixbuf_size_prepared_cb (GdkPixbufLoader *loader,
  90                                                   gint width,
  91                                                   gint height,
  92                                                   gpointer data);
  93 static char**     extract_argv                   (EvDocument *document,
  94                                                   gint page);
  95
  96
  97 EV_BACKEND_REGISTER_WITH_CODE (ComicsDocument, comics_document,
  98         {
  99                 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
 100                                                 comics_document_document_thumbnails_iface_init);
 101         } );
 102
 103 static char *
 104 comics_regex_quote (const char *s)
 105 {
 106     char *ret, *d;
 107
 108     d = ret = g_malloc (strlen (s) * 4 + 3);
 109
 110     *d++ = '\'';
 111
 112     for (; *s; s++, d++) {
 113         switch (*s) {
 114         case '?':
 115         case '|':
 116         case '[':
 117         case ']':
 118         case '*':
 119         case '\\':
 120             *d++ = '\\';
 121             break;
 122         case '\'':
 123             *d++ = '\'';
 124             *d++ = '\\';
 125             *d++ = '\'';
 126             break;
 127         }
 128         *d = *s;
 129     }
 130
 131     *d++ = '\'';
 132     *d = '\0';
 133
 134     return ret;
 135 }
 136
 137 /* This function manages the command for decompressing a comic book */
 138 static gboolean
 139 comics_decompress_temp_dir (const gchar *command_decompress_tmp,
 140                             const gchar *command,
 141                             GError      **error)
 142 {
 143         gboolean success;
 144         gchar *std_out, *basename;
 145         GError *err = NULL;
 146         gint retval;
 147
 148         success = g_spawn_command_line_sync (command_decompress_tmp, &std_out,
 149                                              NULL, &retval, &err);
 150         basename = g_path_get_basename (command);
 151         if (!success) {
 152                 g_set_error (error,
 153                              EV_DOCUMENT_ERROR,
 154                              EV_DOCUMENT_ERROR_INVALID,
 155                              _("Error launching the command “%s” in order to "
 156                              "decompress the comic book: %s"),
 157                              basename,
 158                              err->message);
 159                 g_error_free (err);
 160         } else if (WIFEXITED (retval)) {
 161                 if (WEXITSTATUS (retval) == EXIT_SUCCESS) {
 162                         g_free (std_out);
 163                         g_free (basename);
 164                         return TRUE;
 165                 } else {
 166                         g_set_error (error,
 167                                      EV_DOCUMENT_ERROR,
 168                                      EV_DOCUMENT_ERROR_INVALID,
 169                                      _("The command “%s” failed at "
 170                                      "decompressing the comic book."),
 171                                      basename);
 172                         g_free (std_out);
 173                 }
 174         } else {
 175                 g_set_error (error,
 176                              EV_DOCUMENT_ERROR,
 177                              EV_DOCUMENT_ERROR_INVALID,
 178                              _("The command “%s” did not end normally."),
 179                              basename);
 180                 g_free (std_out);
 181         }
 182         g_free (basename);
 183         return FALSE;
 184 }
 185
 186 /* This function shows how to use the choosen command for decompressing a
 187  * comic book file. It modifies fields of the ComicsDocument struct with
 188  * this information */
 189 static gboolean
 190 comics_generate_command_lines (ComicsDocument *comics_document,
 191                                GError         **error)
 192 {
 193         gchar *quoted_file;
 194         ComicBookDecompressType type;
 195
 196         type = comics_document->command_usage;
 197         quoted_file = g_shell_quote (comics_document->archive);
 198
 199         comics_document->extract_command =
 200                             g_strdup_printf (command_usage_def[type].extract,
 201                                              comics_document->selected_command);
 202         comics_document->list_command =
 203                             g_strdup_printf (command_usage_def[type].list,
 204                                              comics_document->selected_command,
 205                                              quoted_file);
 206         comics_document->regex_arg = command_usage_def[type].regex_arg;
 207         comics_document->offset = command_usage_def[type].offset;
 208         if (command_usage_def[type].decompress_tmp) {
 209                 comics_document->dir = ev_mkdtemp ("comics.XXXXXX", error);
 210                 if (comics_document->dir == NULL)
 211                         return FALSE;
 212
 213                 /* unrar-free can't create directories, but ev_mkdtemp already created the dir */
 214
 215                 comics_document->decompress_tmp =
 216                         g_strdup_printf (command_usage_def[type].decompress_tmp,
 217                                          comics_document->selected_command,
 218                                          quoted_file,
 219                                          comics_document->dir);
 220                 g_free (quoted_file);
 221
 222                 if (!comics_decompress_temp_dir (comics_document->decompress_tmp,
 223                     comics_document->selected_command, error))
 224                         return FALSE;
 225                 else
 226                         return TRUE;
 227         } else {
 228                 g_free (quoted_file);
 229                 return TRUE;
 230         }
 231
 232 }
 233
 234 /* This function chooses an external command for decompressing a comic
 235  * book based on its mime tipe. */
 236 static gboolean
 237 comics_check_decompress_command (gchar          *mime_type,
 238                                  ComicsDocument *comics_document,
 239                                  GError         **error)
 240 {
 241         gboolean success;
 242         gchar *std_out, *std_err;
 243         gint retval;
 244         GError *err = NULL;
 245
 246         /* FIXME, use proper cbr/cbz mime types once they're
 247          * included in shared-mime-info */
 248
 249         if (!strcmp (mime_type, "application/x-cbr") ||
 250             !strcmp (mime_type, "application/x-rar")) {
 251                 /* The RARLAB provides a no-charge proprietary (freeware)
 252                 * decompress-only client for Linux called unrar. Another
 253                 * option is a GPLv2-licensed command-line tool developed by
 254                 * the Gna! project. Confusingly enough, the free software RAR
 255                 * decoder is also named unrar. For this reason we need to add
 256                 * some lines for disambiguation. Sorry for the added the
 257                 * complexity but it's life :)
 258                 * Finally, some distributions, like Debian, rename this free
 259                 * option as unrar-free.
 260                 * */
 261                 comics_document->selected_command =
 262                                         g_find_program_in_path ("unrar");
 263                 if (comics_document->selected_command) {
 264                         /* We only use std_err to avoid printing useless error
 265                          * messages on the terminal */
 266                         success =
 267                                 g_spawn_command_line_sync (
 268                                               comics_document->selected_command,
 269                                                            &std_out, &std_err,
 270                                                            &retval, &err);
 271                         if (!success) {
 272                                 g_propagate_error (error, err);
 273                                 g_error_free (err);
 274                                 return FALSE;
 275                         /* I don't check retval status because RARLAB unrar
 276                          * doesn't have a way to return 0 without involving an
 277                          * operation with a file*/
 278                         } else if (WIFEXITED (retval)) {
 279                                 if (g_strrstr (std_out,"freeware") != NULL)
 280                                         /* The RARLAB freeware client */
 281                                         comics_document->command_usage = RARLABS;
 282                                 else
 283                                         /* The Gna! free software client */
 284                                         comics_document->command_usage = GNAUNRAR;
 285
 286                                 g_free (std_out);
 287                                 g_free (std_err);
 288                                 return TRUE;
 289                         }
 290                 }
 291                 /* The Gna! free software client with Debian naming convention */
 292                 comics_document->selected_command =
 293                                 g_find_program_in_path ("unrar-free");
 294                 if (comics_document->selected_command) {
 295                         comics_document->command_usage = GNAUNRAR;
 296                         return TRUE;
 297                 }
 298
 299         } else if (!strcmp (mime_type, "application/x-cbz") ||
 300                    !strcmp (mime_type, "application/zip")) {
 301                 /* InfoZIP's unzip program */
 302                 comics_document->selected_command =
 303                                 g_find_program_in_path ("unzip");
 304                 if (comics_document->selected_command) {
 305                         comics_document->command_usage = UNZIP;
 306                         return TRUE;
 307                 }
 308
 309         } else if (!strcmp (mime_type, "application/x-cb7") ||
 310                    !strcmp (mime_type, "application/x-7z-compressed")) {
 311                 /* 7zr, 7za and 7z are the commands from the p7zip project able
 312                  * to decompress .7z files */
 313                         comics_document->selected_command =
 314                                 g_find_program_in_path ("7zr");
 315                         if (comics_document->selected_command) {
 316                                 comics_document->command_usage = P7ZIP;
 317                                 return TRUE;
 318                         }
 319                         comics_document->selected_command =
 320                                 g_find_program_in_path ("7za");
 321                         if (comics_document->selected_command) {
 322                                 comics_document->command_usage = P7ZIP;
 323                                 return TRUE;
 324                         }
 325                         comics_document->selected_command =
 326                                 g_find_program_in_path ("7z");
 327                         if (comics_document->selected_command) {
 328                                 comics_document->command_usage = P7ZIP;
 329                                 return TRUE;
 330                         }
 331         } else {
 332                 g_set_error (error,
 333                              EV_DOCUMENT_ERROR,
 334                              EV_DOCUMENT_ERROR_INVALID,
 335                              _("Not a comic book MIME type: %s"),
 336                              mime_type);
 337                              return FALSE;
 338         }
 339         g_set_error_literal (error,
 340                              EV_DOCUMENT_ERROR,
 341                              EV_DOCUMENT_ERROR_INVALID,
 342                              _("Can't find an appropriate command to "
 343                              "decompress this type of comic book"));
 344         return FALSE;
 345 }
 346
 347 static int
 348 sort_page_names (gconstpointer a,
 349                  gconstpointer b)
 350 {
 351   return strcmp (* (const char **) a, * (const char **) b);
 352 }
 353
 354 static gboolean
 355 comics_document_load (EvDocument *document,
 356                       const char *uri,
 357                       GError    **error)
 358 {
 359         ComicsDocument *comics_document = COMICS_DOCUMENT (document);
 360         GSList *supported_extensions;
 361         gchar *std_out;
 362         gchar *mime_type;
 363         gchar **cb_files, *cb_file;
 364         gboolean success;
 365         int i, retval;
 366         GError *err = NULL;
 367
 368         comics_document->archive = g_filename_from_uri (uri, NULL, error);
 369         if (!comics_document->archive)
 370                 return FALSE;
 371
 372         mime_type = ev_file_get_mime_type (uri, FALSE, &err);
 373         if (!mime_type) {
 374                 if (err) {
 375                         g_propagate_error (error, err);
 376                 } else {
 377                         g_set_error_literal (error,
 378                                              EV_DOCUMENT_ERROR,
 379                                              EV_DOCUMENT_ERROR_INVALID,
 380                                              _("Unknown MIME Type"));
 381                 }
 382
 383                 return FALSE;
 384         }
 385
 386         if (!comics_check_decompress_command (mime_type, comics_document,
 387         error)) {
 388                 g_free (mime_type);
 389                 return FALSE;
 390         } else if (!comics_generate_command_lines (comics_document, error)) {
 391                    g_free (mime_type);
 392                 return FALSE;
 393         }
 394
 395         g_free (mime_type);
 396
 397         /* Get list of files in archive */
 398         success = g_spawn_command_line_sync (comics_document->list_command,
 399                                              &std_out, NULL, &retval, error);
 400
 401         if (!success) {
 402                 return FALSE;
 403         } else if (!WIFEXITED(retval) || WEXITSTATUS(retval) != EXIT_SUCCESS) {
 404                 g_set_error_literal (error,
 405                                      EV_DOCUMENT_ERROR,
 406                                      EV_DOCUMENT_ERROR_INVALID,
 407                                      _("File corrupted"));
 408                 return FALSE;
 409         }
 410
 411         /* FIXME: is this safe against filenames containing \n in the archive ? */
 412         cb_files = g_strsplit (std_out, "\n", 0);
 413         g_free (std_out);
 414
 415         if (!cb_files) {
 416                 g_set_error_literal (error,
 417                                      EV_DOCUMENT_ERROR,
 418                                      EV_DOCUMENT_ERROR_INVALID,
 419                                      _("No files in archive"));
 420                 return FALSE;
 421         }
 422
 423         comics_document->page_names = g_ptr_array_sized_new (64);
 424
 425         supported_extensions = get_supported_image_extensions ();
 426         for (i = 0; cb_files[i] != NULL; i++) {
 427                 if (comics_document->offset != NO_OFFSET) {
 428                         if (g_utf8_strlen (cb_files[i],-1) >
 429                             comics_document->offset) {
 430                                 cb_file =
 431                                         g_utf8_offset_to_pointer (cb_files[i],
 432                                                        comics_document->offset);
 433                         } else {
 434                                 continue;
 435                         }
 436                 } else {
 437                         cb_file = cb_files[i];
 438                 }
 439                 gchar *suffix = g_strrstr (cb_file, ".");
 440                 if (!suffix)
 441                         continue;
 442                 suffix = g_ascii_strdown (suffix + 1, -1);
 443                 if (g_slist_find_custom (supported_extensions, suffix,
 444                                          (GCompareFunc) strcmp) != NULL) {
 445                         g_ptr_array_add (comics_document->page_names,
 446                                          g_strstrip (g_strdup (cb_file)));
 447                 }
 448                 g_free (suffix);
 449         }
 450         g_strfreev (cb_files);
 451         g_slist_foreach (supported_extensions, (GFunc) g_free, NULL);
 452         g_slist_free (supported_extensions);
 453
 454         if (comics_document->page_names->len == 0) {
 455                 g_set_error (error,
 456                              EV_DOCUMENT_ERROR,
 457                              EV_DOCUMENT_ERROR_INVALID,
 458                              _("No images found in archive %s"),
 459                              uri);
 460                 return FALSE;
 461         }
 462
 463         /* Now sort the pages */
 464         g_ptr_array_sort (comics_document->page_names, sort_page_names);
 465
 466         return TRUE;
 467 }
 468
 469
 470 static gboolean
 471 comics_document_save (EvDocument *document,
 472                       const char *uri,
 473                       GError    **error)
 474 {
 475         ComicsDocument *comics_document = COMICS_DOCUMENT (document);
 476
 477         return ev_xfer_uri_simple (comics_document->archive, uri, error);
 478 }
 479
 480 static int
 481 comics_document_get_n_pages (EvDocument *document)
 482 {
 483         ComicsDocument *comics_document = COMICS_DOCUMENT (document);
 484
 485         if (comics_document->page_names == NULL)
 486                 return 0;
 487
 488         return comics_document->page_names->len;
 489 }
 490
 491 static void
 492 comics_document_get_page_size (EvDocument *document,
 493                                EvPage     *page,
 494                                double     *width,
 495                                double     *height)
 496 {
 497         GdkPixbufLoader *loader;
 498         char **argv;
 499         guchar buf[1024];
 500         gboolean success, got_size = FALSE;
 501         gint outpipe = -1;
 502         GPid child_pid = -1;
 503         gssize bytes;
 504         GdkPixbuf *pixbuf;
 505         gchar *filename;
 506         ComicsDocument *comics_document = COMICS_DOCUMENT (document);
 507
 508         if (!comics_document->decompress_tmp) {
 509                 argv = extract_argv (document, page->index);
 510                 success = g_spawn_async_with_pipes (NULL, argv, NULL,
 511                                                     G_SPAWN_SEARCH_PATH |
 512                                                     G_SPAWN_STDERR_TO_DEV_NULL,
 513                                                     NULL, NULL,
 514                                                     &child_pid,
 515                                                     NULL, &outpipe, NULL, NULL);
 516                 g_strfreev (argv);
 517                 g_return_if_fail (success == TRUE);
 518
 519                 loader = gdk_pixbuf_loader_new ();
 520                 g_signal_connect (loader, "area-prepared",
 521                                   G_CALLBACK (get_page_size_area_prepared_cb),
 522                                   &got_size);
 523
 524                 while (outpipe >= 0) {
 525                         bytes = read (outpipe, buf, 1024);
 526
 527                         if (bytes > 0)
 528                         gdk_pixbuf_loader_write (loader, buf, bytes, NULL);
 529                         if (bytes <= 0 || got_size) {
 530                                 close (outpipe);
 531                                 outpipe = -1;
 532                                 gdk_pixbuf_loader_close (loader, NULL);
 533                         }
 534                 }
 535
 536                 if (gdk_pixbuf_loader_get_pixbuf (loader)) {
 537                         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 538                         if (width)
 539                                 *width = gdk_pixbuf_get_width (pixbuf);
 540                         if (height)
 541                                 *height = gdk_pixbuf_get_height (pixbuf);
 542                 }
 543
 544                 g_spawn_close_pid (child_pid);
 545                 g_object_unref (loader);
 546         } else {
 547                 filename = g_build_filename (comics_document->dir,
 548                                              (char *) comics_document->page_names->pdata[page->index],
 549                                              NULL);
 550                 pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
 551                 g_free (filename);
 552                 if (width)
 553                         *width = gdk_pixbuf_get_width (pixbuf);
 554                 if (height)
 555                         *height = gdk_pixbuf_get_height (pixbuf);
 556         }
 557 }
 558
 559 static void
 560 get_page_size_area_prepared_cb (GdkPixbufLoader *loader,
 561                                 gpointer         data)
 562 {
 563         gboolean *got_size = data;
 564         *got_size = TRUE;
 565 }
 566
 567 static GdkPixbuf *
 568 comics_document_render_pixbuf (EvDocument      *document,
 569                                EvRenderContext *rc)
 570 {
 571         GdkPixbufLoader *loader;
 572         GdkPixbuf *rotated_pixbuf;
 573         char **argv;
 574         guchar buf[4096];
 575         gboolean success;
 576         gint outpipe = -1;
 577         GPid child_pid = -1;
 578         gssize bytes;
 579         gint width, height;
 580         gchar *filename;
 581         ComicsDocument *comics_document = COMICS_DOCUMENT (document);
 582
 583         if (!comics_document->decompress_tmp) {
 584                 argv = extract_argv (document, rc->page->index);
 585                 success = g_spawn_async_with_pipes (NULL, argv, NULL,
 586                                                     G_SPAWN_SEARCH_PATH |
 587                                                     G_SPAWN_STDERR_TO_DEV_NULL,
 588                                                     NULL, NULL,
 589                                                     &child_pid,
 590                                                     NULL, &outpipe, NULL, NULL);
 591                 g_strfreev (argv);
 592                 g_return_val_if_fail (success == TRUE, NULL);
 593
 594                 loader = gdk_pixbuf_loader_new ();
 595                 g_signal_connect (loader, "size-prepared",
 596                                   G_CALLBACK (render_pixbuf_size_prepared_cb),
 597                                   &rc->scale);
 598
 599                 while (outpipe >= 0) {
 600                         bytes = read (outpipe, buf, 4096);
 601
 602                         if (bytes > 0) {
 603                                 gdk_pixbuf_loader_write (loader, buf, bytes,
 604                                 NULL);
 605                         } else if (bytes <= 0) {
 606                                 close (outpipe);
 607                                 gdk_pixbuf_loader_close (loader, NULL);
 608                                 outpipe = -1;
 609                         }
 610                 }
 611
 612                 rotated_pixbuf = gdk_pixbuf_rotate_simple (
 613                                         gdk_pixbuf_loader_get_pixbuf (loader),
 614                                         360 - rc->rotation);
 615                 g_spawn_close_pid (child_pid);
 616                 g_object_unref (loader);
 617         } else {
 618                 filename =
 619                         g_build_filename (comics_document->dir,
 620                                           (char *) comics_document->page_names->pdata[rc->page->index],
 621                                           NULL);
 622
 623                 gdk_pixbuf_get_file_info (filename, &width, &height);
 624
 625                 rotated_pixbuf =
 626                   gdk_pixbuf_rotate_simple (gdk_pixbuf_new_from_file_at_size (
 627                                             filename, width * (rc->scale) + 0.5,
 628                                             height * (rc->scale) + 0.5, NULL),
 629                                             360 - rc->rotation);
 630                 g_free (filename);
 631
 632         }
 633         return rotated_pixbuf;
 634 }
 635
 636 static cairo_surface_t *
 637 comics_document_render (EvDocument      *document,
 638                         EvRenderContext *rc)
 639 {
 640         GdkPixbuf       *pixbuf;
 641         cairo_surface_t *surface;
 642
 643         pixbuf = comics_document_render_pixbuf (document, rc);
 644         surface = ev_document_misc_surface_from_pixbuf (pixbuf);
 645         g_object_unref (pixbuf);
 646
 647         return surface;
 648 }
 649
 650 static void
 651 render_pixbuf_size_prepared_cb (GdkPixbufLoader *loader,
 652                                 gint             width,
 653                                 gint             height,
 654                                 gpointer         data)
 655 {
 656         double *scale = data;
 657         int w = (width  * (*scale) + 0.5);
 658         int h = (height * (*scale) + 0.5);
 659
 660         gdk_pixbuf_loader_set_size (loader, w, h);
 661 }
 662
 663 /**
 664  * comics_remove_dir: Removes a directory recursively.
 665  * Returns:
 666  *      0 if it was successfully deleted,
 667  *      -1 if an error occurred
 668  */
 669 static int
 670 comics_remove_dir (gchar *path_name)
 671 {
 672         GDir  *content_dir;
 673         const gchar *filename;
 674         gchar *filename_with_path;
 675
 676         if (g_file_test (path_name, G_FILE_TEST_IS_DIR)) {
 677                 content_dir = g_dir_open  (path_name, 0, NULL);
 678                 filename  = g_dir_read_name (content_dir);
 679                 while (filename) {
 680                         filename_with_path =
 681                                 g_build_filename (path_name,
 682                                                   filename, NULL);
 683                         comics_remove_dir (filename_with_path);
 684                         g_free (filename_with_path);
 685                         filename = g_dir_read_name (content_dir);
 686                 }
 687                 g_dir_close (content_dir);
 688         }
 689         /* Note from g_remove() documentation: on Windows, it is in general not
 690          * possible to remove a file that is open to some process, or mapped
 691          * into memory.*/
 692         return (g_remove (path_name));
 693 }
 694
 695 static void
 696 comics_document_finalize (GObject *object)
 697 {
 698         ComicsDocument *comics_document = COMICS_DOCUMENT (object);
 699
 700         if (comics_document->decompress_tmp) {
 701                 if (comics_remove_dir (comics_document->dir) == -1)
 702                         g_warning (_("There was an error deleting “%s”."),
 703                                    comics_document->dir);
 704                 g_free (comics_document->dir);
 705         }
 706
 707         if (comics_document->page_names) {
 708                 g_ptr_array_foreach (comics_document->page_names, (GFunc) g_free, NULL);
 709                 g_ptr_array_free (comics_document->page_names, TRUE);
 710         }
 711
 712         g_free (comics_document->archive);
 713         g_free (comics_document->selected_command);
 714         g_free (comics_document->extract_command);
 715         g_free (comics_document->list_command);
 716
 717         G_OBJECT_CLASS (comics_document_parent_class)->finalize (object);
 718 }
 719
 720 static void
 721 comics_document_class_init (ComicsDocumentClass *klass)
 722 {
 723         GObjectClass    *gobject_class = G_OBJECT_CLASS (klass);
 724         EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
 725
 726         gobject_class->finalize = comics_document_finalize;
 727
 728         ev_document_class->load = comics_document_load;
 729         ev_document_class->save = comics_document_save;
 730         ev_document_class->get_n_pages = comics_document_get_n_pages;
 731         ev_document_class->get_page_size = comics_document_get_page_size;
 732         ev_document_class->render = comics_document_render;
 733 }
 734
 735 static void
 736 comics_document_init (ComicsDocument *comics_document)
 737 {
 738         comics_document->archive = NULL;
 739         comics_document->page_names = NULL;
 740         comics_document->extract_command = NULL;
 741 }
 742
 743 /* Returns a list of file extensions supported by gdk-pixbuf */
 744 static GSList*
 745 get_supported_image_extensions()
 746 {
 747         GSList *extensions = NULL;
 748         GSList *formats = gdk_pixbuf_get_formats ();
 749         GSList *l;
 750
 751         for (l = formats; l != NULL; l = l->next) {
 752                 int i;
 753                 gchar **ext = gdk_pixbuf_format_get_extensions (l->data);
 754
 755                 for (i = 0; ext[i] != NULL; i++) {
 756                         extensions = g_slist_append (extensions,
 757                                                      g_strdup (ext[i]));
 758                 }
 759
 760                 g_strfreev (ext);
 761         }
 762
 763         g_slist_free (formats);
 764         return extensions;
 765 }
 766
 767 static GdkPixbuf *
 768 comics_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 769                                           EvRenderContext      *rc,
 770                                           gboolean              border)
 771 {
 772         GdkPixbuf *thumbnail;
 773
 774         thumbnail = comics_document_render_pixbuf (EV_DOCUMENT (document), rc);
 775
 776         if (border) {
 777               GdkPixbuf *tmp_pixbuf = thumbnail;
 778
 779               thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
 780               g_object_unref (tmp_pixbuf);
 781         }
 782
 783         return thumbnail;
 784 }
 785
 786 static void
 787 comics_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 788                                            EvRenderContext      *rc,
 789                                            gint                 *width,
 790                                            gint                 *height)
 791 {
 792         gdouble page_width, page_height;
 793
 794         comics_document_get_page_size (EV_DOCUMENT (document), rc->page,
 795                                        &page_width, &page_height);
 796
 797         if (rc->rotation == 90 || rc->rotation == 270) {
 798                 *width = (gint) (page_height * rc->scale);
 799                 *height = (gint) (page_width * rc->scale);
 800         } else {
 801                 *width = (gint) (page_width * rc->scale);
 802                 *height = (gint) (page_height * rc->scale);
 803         }
 804 }
 805
 806 static void
 807 comics_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 808 {
 809         iface->get_thumbnail = comics_document_thumbnails_get_thumbnail;
 810         iface->get_dimensions = comics_document_thumbnails_get_dimensions;
 811 }
 812
 813 static char**
 814 extract_argv (EvDocument *document, gint page)
 815 {
 816         ComicsDocument *comics_document = COMICS_DOCUMENT (document);
 817         char **argv;
 818         char *command_line, *quoted_archive, *quoted_filename;
 819         GError *err = NULL;
 820
 821         if (page >= comics_document->page_names->len)
 822                 return NULL;
 823
 824         quoted_archive = g_shell_quote (comics_document->archive);
 825         if (comics_document->regex_arg) {
 826                 quoted_filename = comics_regex_quote (comics_document->page_names->pdata[page]);
 827         } else {
 828                 quoted_filename = g_shell_quote (comics_document->page_names->pdata[page]);
 829         }
 830
 831         command_line = g_strdup_printf ("%s -- %s %s",
 832                                         comics_document->extract_command,
 833                                         quoted_archive,
 834                                         quoted_filename);
 835
 836         g_shell_parse_argv (command_line, NULL, &argv, &err);
 837
 838         if (err) {
 839                 g_warning (_("Error %s"), err->message);
 840                 g_error_free (err);
 841                 return NULL;
 842         }
 843
 844         g_free (command_line);
 845         g_free (quoted_archive);
 846         g_free (quoted_filename);
 847         return argv;
 848 }