backend/djvu/djvu-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, Nickolay V. Shmyrev <nshmyrev@yandex.ru>
   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 <config.h>
  23 #include "djvu-document.h"
  24 #include "djvu-text.h"
  25 #include "djvu-links.h"
  26 #include "djvu-document-private.h"
  27 #include "ev-document-thumbnails.h"
  28 #include "ev-file-exporter.h"
  29 #include "ev-document-misc.h"
  30 #include "ev-document-find.h"
  31 #include "ev-document-links.h"
  32 #include "ev-selection.h"
  33 #include "ev-file-helpers.h"
  34
  35 #include <gdk-pixbuf/gdk-pixbuf-core.h>
  36 #include <glib/gi18n.h>
  37 #include <glib/gunicode.h>
  38 #include <string.h>
  39
  40 #define SCALE_FACTOR 0.2
  41
  42 enum {
  43         PROP_0,
  44         PROP_TITLE
  45 };
  46
  47 struct _DjvuDocumentClass
  48 {
  49         GObjectClass parent_class;
  50 };
  51
  52 typedef struct _DjvuDocumentClass DjvuDocumentClass;
  53
  54 static void djvu_document_document_iface_init (EvDocumentIface *iface);
  55 static void djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  56 static void djvu_document_file_exporter_iface_init (EvFileExporterIface *iface);
  57 static void djvu_document_find_iface_init (EvDocumentFindIface *iface);
  58 static void djvu_document_document_links_iface_init  (EvDocumentLinksIface *iface);
  59 static void djvu_selection_iface_init (EvSelectionIface *iface);
  60
  61 EV_BACKEND_REGISTER_WITH_CODE (DjvuDocument, djvu_document,
  62     {
  63       EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, djvu_document_document_thumbnails_iface_init);
  64       EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER, djvu_document_file_exporter_iface_init);
  65       EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND, djvu_document_find_iface_init);
  66       EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS, djvu_document_document_links_iface_init);
  67       EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_SELECTION, djvu_selection_iface_init);
  68      });
  69
  70
  71 void
  72 djvu_handle_events (DjvuDocument *djvu_document, int wait)
  73 {
  74         ddjvu_context_t *ctx = djvu_document->d_context;
  75         const ddjvu_message_t *msg;
  76
  77         if (!ctx)
  78                 return;
  79
  80         if (wait)
  81                 msg = ddjvu_message_wait (ctx);
  82
  83         while ((msg = ddjvu_message_peek (ctx))) {
  84                 switch (msg->m_any.tag) {
  85                         case DDJVU_ERROR:
  86                                 g_warning ("DjvuLibre error: %s",
  87                                            msg->m_error.message);
  88                                 if (msg->m_error.filename)
  89                                         g_warning ("DjvuLibre error: %s:%d",
  90                                                    msg->m_error.filename,
  91                                                    msg->m_error.lineno);
  92                                 break;
  93                         default:
  94                                 break;
  95                 }
  96                 ddjvu_message_pop (ctx);
  97         }
  98 }
  99
 100 static gboolean
 101 djvu_document_load (EvDocument  *document,
 102                     const char  *uri,
 103                     GError     **error)
 104 {
 105         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 106         ddjvu_document_t *doc;
 107         gchar *filename;
 108         gboolean missing_files = FALSE;
 109
 110         /* FIXME: We could actually load uris  */
 111         filename = g_filename_from_uri (uri, NULL, error);
 112         if (!filename)
 113                 return FALSE;
 114
 115         doc = ddjvu_document_create_by_filename (djvu_document->d_context, filename, TRUE);
 116
 117         if (!doc) {
 118                 g_free (filename);
 119                 return FALSE;
 120         }
 121
 122         if (djvu_document->d_document)
 123             ddjvu_document_release (djvu_document->d_document);
 124
 125         djvu_document->d_document = doc;
 126
 127         while (!ddjvu_document_decoding_done (djvu_document->d_document))
 128                 djvu_handle_events (djvu_document, TRUE);
 129         g_free (djvu_document->uri);
 130         djvu_document->uri = g_strdup (uri);
 131
 132         if (ddjvu_document_get_type (djvu_document->d_document) == DDJVU_DOCTYPE_INDIRECT) {
 133                 gint n_files;
 134                 gint i;
 135                 gchar *base;
 136
 137                 base = g_path_get_dirname (filename);
 138
 139                 n_files = ddjvu_document_get_filenum (djvu_document->d_document);
 140                 for (i = 0; i < n_files; i++) {
 141                         struct ddjvu_fileinfo_s fileinfo;
 142                         gchar *file;
 143
 144                         ddjvu_document_get_fileinfo (djvu_document->d_document,
 145                                                      i, &fileinfo);
 146
 147                         if (fileinfo.type != 'P')
 148                                 continue;
 149
 150                         file = g_build_filename (base, fileinfo.id, NULL);
 151                         if (!g_file_test (file, G_FILE_TEST_EXISTS)) {
 152                                 missing_files = TRUE;
 153                                 g_free (file);
 154
 155                                 break;
 156                         }
 157                         g_free (file);
 158                 }
 159                 g_free (base);
 160         }
 161         g_free (filename);
 162
 163         if (missing_files) {
 164                 g_set_error (error,
 165                              G_FILE_ERROR,
 166                              G_FILE_ERROR_EXIST,
 167                              _("The document is composed by several files. "
 168                                "One or more of such files cannot be accessed."));
 169
 170                 return FALSE;
 171         }
 172
 173         return TRUE;
 174 }
 175
 176
 177 static gboolean
 178 djvu_document_save (EvDocument  *document,
 179                     const char  *uri,
 180                     GError     **error)
 181 {
 182         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 183
 184         return ev_xfer_uri_simple (djvu_document->uri, uri, error);
 185 }
 186
 187 int
 188 djvu_document_get_n_pages (EvDocument  *document)
 189 {
 190         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 191
 192         g_return_val_if_fail (djvu_document->d_document, 0);
 193
 194         return ddjvu_document_get_pagenum (djvu_document->d_document);
 195 }
 196
 197 static void
 198 document_get_page_size (DjvuDocument *djvu_document,
 199                         gint          page,
 200                         double       *width,
 201                         double       *height)
 202 {
 203         ddjvu_pageinfo_t info;
 204         ddjvu_status_t r;
 205
 206         while ((r = ddjvu_document_get_pageinfo(djvu_document->d_document, page, &info)) < DDJVU_JOB_OK)
 207                 djvu_handle_events(djvu_document, TRUE);
 208
 209         if (r >= DDJVU_JOB_FAILED)
 210                 djvu_handle_events(djvu_document, TRUE);
 211
 212         *width = info.width * SCALE_FACTOR;
 213         *height = info.height * SCALE_FACTOR;
 214 }
 215
 216 static void
 217 djvu_document_get_page_size (EvDocument   *document,
 218                              EvPage       *page,
 219                              double       *width,
 220                              double       *height)
 221 {
 222         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 223
 224         g_return_if_fail (djvu_document->d_document);
 225
 226         document_get_page_size (djvu_document, page->index,
 227                                 width, height);
 228 }
 229
 230 static cairo_surface_t *
 231 djvu_document_render (EvDocument      *document,
 232                       EvRenderContext *rc)
 233 {
 234         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 235         cairo_surface_t *surface;
 236         gchar *pixels;
 237         gint   rowstride;
 238         ddjvu_rect_t rrect;
 239         ddjvu_rect_t prect;
 240         ddjvu_page_t *d_page;
 241         ddjvu_page_rotation_t rotation;
 242         double page_width, page_height, tmp;
 243         static const cairo_user_data_key_t key;
 244
 245         d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, rc->page->index);
 246
 247         while (!ddjvu_page_decoding_done (d_page))
 248                 djvu_handle_events(djvu_document, TRUE);
 249
 250         page_width = ddjvu_page_get_width (d_page) * rc->scale * SCALE_FACTOR + 0.5;
 251         page_height = ddjvu_page_get_height (d_page) * rc->scale * SCALE_FACTOR + 0.5;
 252
 253         switch (rc->rotation) {
 254                 case 90:
 255                         rotation = DDJVU_ROTATE_90;
 256                         tmp = page_height;
 257                         page_height = page_width;
 258                         page_width = tmp;
 259
 260                         break;
 261                 case 180:
 262                         rotation = DDJVU_ROTATE_180;
 263
 264                         break;
 265                 case 270:
 266                         rotation = DDJVU_ROTATE_270;
 267                         tmp = page_height;
 268                         page_height = page_width;
 269                         page_width = tmp;
 270
 271                         break;
 272                 default:
 273                         rotation = DDJVU_ROTATE_0;
 274         }
 275 #ifdef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
 276         rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, page_width);
 277 #else
 278         rowstride = page_width * 4;
 279 #endif
 280         pixels = (gchar *) g_malloc (page_height * rowstride);
 281         surface = cairo_image_surface_create_for_data ((guchar *)pixels,
 282                                                        CAIRO_FORMAT_RGB24,
 283                                                        page_width,
 284                                                        page_height,
 285                                                        rowstride);
 286         cairo_surface_set_user_data (surface, &key,
 287                                      pixels, (cairo_destroy_func_t)g_free);
 288         prect.x = 0;
 289         prect.y = 0;
 290         prect.w = page_width;
 291         prect.h = page_height;
 292         rrect = prect;
 293
 294         ddjvu_page_set_rotation (d_page, rotation);
 295
 296         ddjvu_page_render (d_page, DDJVU_RENDER_COLOR,
 297                            &prect,
 298                            &rrect,
 299                            djvu_document->d_format,
 300                            rowstride,
 301                            pixels);
 302
 303         return surface;
 304 }
 305
 306 static void
 307 djvu_document_finalize (GObject *object)
 308 {
 309         DjvuDocument *djvu_document = DJVU_DOCUMENT (object);
 310
 311         if (djvu_document->search)
 312             djvu_text_free (djvu_document->search);
 313
 314         if (djvu_document->d_document)
 315             ddjvu_document_release (djvu_document->d_document);
 316
 317         if (djvu_document->opts)
 318             g_string_free (djvu_document->opts, TRUE);
 319
 320         if (djvu_document->ps_filename)
 321             g_free (djvu_document->ps_filename);
 322
 323         ddjvu_context_release (djvu_document->d_context);
 324         ddjvu_format_release (djvu_document->d_format);
 325         ddjvu_format_release (djvu_document->thumbs_format);
 326         g_free (djvu_document->uri);
 327
 328         G_OBJECT_CLASS (djvu_document_parent_class)->finalize (object);
 329 }
 330
 331 static void
 332 djvu_document_class_init (DjvuDocumentClass *klass)
 333 {
 334         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 335
 336         gobject_class->finalize = djvu_document_finalize;
 337 }
 338
 339 static EvDocumentInfo *
 340 djvu_document_get_info (EvDocument *document)
 341 {
 342         EvDocumentInfo *info;
 343
 344         info = g_new0 (EvDocumentInfo, 1);
 345
 346         return info;
 347 }
 348
 349 static void
 350 djvu_document_document_iface_init (EvDocumentIface *iface)
 351 {
 352         iface->load = djvu_document_load;
 353         iface->save = djvu_document_save;
 354         iface->get_n_pages = djvu_document_get_n_pages;
 355         iface->get_page_size = djvu_document_get_page_size;
 356         iface->render = djvu_document_render;
 357         iface->get_info = djvu_document_get_info;
 358 }
 359
 360 static gchar *
 361 djvu_selection_get_selected_text (EvSelection     *selection,
 362                                   EvRenderContext *rc,
 363                                   EvSelectionStyle style,
 364                                   EvRectangle     *points)
 365 {
 366         DjvuDocument *djvu_document = DJVU_DOCUMENT (selection);
 367         double width, height;
 368         EvRectangle rectangle;
 369         gchar *text;
 370
 371         djvu_document_get_page_size (EV_DOCUMENT (djvu_document),
 372                                      rc->page, &width, &height);
 373         rectangle.x1 = points->x1 / SCALE_FACTOR;
 374         rectangle.y1 = (height - points->y2) / SCALE_FACTOR;
 375         rectangle.x2 = points->x2 / SCALE_FACTOR;
 376         rectangle.y2 = (height - points->y1) / SCALE_FACTOR;
 377
 378         text = djvu_text_copy (djvu_document, rc->page->index, &rectangle);
 379
 380         if (text == NULL)
 381                 text = g_strdup ("");
 382
 383         return text;
 384 }
 385
 386 static void
 387 djvu_selection_iface_init (EvSelectionIface *iface)
 388 {
 389         iface->get_selected_text = djvu_selection_get_selected_text;
 390 }
 391
 392 static void
 393 djvu_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 394                                          EvRenderContext      *rc,
 395                                          gint                 *width,
 396                                          gint                 *height)
 397 {
 398         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 399         gdouble page_width, page_height;
 400
 401         djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
 402                                      &page_width, &page_height);
 403
 404         if (rc->rotation == 90 || rc->rotation == 270) {
 405                 *width = (gint) (page_height * rc->scale);
 406                 *height = (gint) (page_width * rc->scale);
 407         } else {
 408                 *width = (gint) (page_width * rc->scale);
 409                 *height = (gint) (page_height * rc->scale);
 410         }
 411 }
 412
 413 static GdkPixbuf *
 414 djvu_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 415                                         EvRenderContext      *rc,
 416                                         gboolean              border)
 417 {
 418         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 419         GdkPixbuf *pixbuf, *rotated_pixbuf;
 420         gdouble page_width, page_height;
 421         gint thumb_width, thumb_height;
 422         guchar *pixels;
 423
 424         g_return_val_if_fail (djvu_document->d_document, NULL);
 425
 426         djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
 427                                      &page_width, &page_height);
 428
 429         thumb_width = (gint) (page_width * rc->scale);
 430         thumb_height = (gint) (page_height * rc->scale);
 431
 432         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
 433                                  thumb_width, thumb_height);
 434         gdk_pixbuf_fill (pixbuf, 0xffffffff);
 435         pixels = gdk_pixbuf_get_pixels (pixbuf);
 436
 437         while (ddjvu_thumbnail_status (djvu_document->d_document, rc->page->index, 1) < DDJVU_JOB_OK)
 438                 djvu_handle_events(djvu_document, TRUE);
 439
 440         ddjvu_thumbnail_render (djvu_document->d_document, rc->page->index,
 441                                 &thumb_width, &thumb_height,
 442                                 djvu_document->thumbs_format,
 443                                 gdk_pixbuf_get_rowstride (pixbuf),
 444                                 (gchar *)pixels);
 445
 446         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
 447         g_object_unref (pixbuf);
 448
 449         if (border) {
 450               GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
 451
 452               rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
 453               g_object_unref (tmp_pixbuf);
 454         }
 455
 456         return rotated_pixbuf;
 457 }
 458
 459 static void
 460 djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 461 {
 462         iface->get_thumbnail = djvu_document_thumbnails_get_thumbnail;
 463         iface->get_dimensions = djvu_document_thumbnails_get_dimensions;
 464 }
 465
 466 /* EvFileExporterIface */
 467 static void
 468 djvu_document_file_exporter_begin (EvFileExporter        *exporter,
 469                                    EvFileExporterContext *fc)
 470 {
 471         DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
 472
 473         if (djvu_document->ps_filename)
 474                 g_free (djvu_document->ps_filename);
 475         djvu_document->ps_filename = g_strdup (fc->filename);
 476
 477         g_string_assign (djvu_document->opts, "-page=");
 478 }
 479
 480 static void
 481 djvu_document_file_exporter_do_page (EvFileExporter  *exporter,
 482                                      EvRenderContext *rc)
 483 {
 484         DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
 485
 486         g_string_append_printf (djvu_document->opts, "%d,", (rc->page->index) + 1);
 487 }
 488
 489 static void
 490 djvu_document_file_exporter_end (EvFileExporter *exporter)
 491 {
 492         int d_optc = 1;
 493         const char *d_optv[d_optc];
 494
 495         DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
 496
 497         FILE *fn = fopen (djvu_document->ps_filename, "w");
 498         if (fn == NULL) {
 499                 g_warning ("Cannot open file “%s”.", djvu_document->ps_filename);
 500                 return;
 501         }
 502
 503         d_optv[0] = djvu_document->opts->str;
 504
 505         ddjvu_job_t * job = ddjvu_document_print(djvu_document->d_document, fn, d_optc, d_optv);
 506         while (!ddjvu_job_done(job)) {
 507                 djvu_handle_events (djvu_document, TRUE);
 508         }
 509
 510         fclose(fn);
 511 }
 512
 513 static EvFileExporterCapabilities
 514 djvu_document_file_exporter_get_capabilities (EvFileExporter *exporter)
 515 {
 516         return  EV_FILE_EXPORTER_CAN_PAGE_SET |
 517                 EV_FILE_EXPORTER_CAN_COPIES |
 518                 EV_FILE_EXPORTER_CAN_COLLATE |
 519                 EV_FILE_EXPORTER_CAN_REVERSE |
 520                 EV_FILE_EXPORTER_CAN_GENERATE_PS;
 521 }
 522
 523 static void
 524 djvu_document_file_exporter_iface_init (EvFileExporterIface *iface)
 525 {
 526         iface->begin = djvu_document_file_exporter_begin;
 527         iface->do_page = djvu_document_file_exporter_do_page;
 528         iface->end = djvu_document_file_exporter_end;
 529         iface->get_capabilities = djvu_document_file_exporter_get_capabilities;
 530 }
 531
 532 static void
 533 djvu_document_init (DjvuDocument *djvu_document)
 534 {
 535         guint masks[4] = { 0xff0000, 0xff00, 0xff, 0xff000000 };
 536
 537         djvu_document->d_context = ddjvu_context_create ("Evince");
 538         djvu_document->d_format = ddjvu_format_create (DDJVU_FORMAT_RGBMASK32, 4, masks);
 539         ddjvu_format_set_row_order (djvu_document->d_format, 1);
 540
 541         djvu_document->thumbs_format = ddjvu_format_create (DDJVU_FORMAT_RGB24, 0, 0);
 542         ddjvu_format_set_row_order (djvu_document->thumbs_format, 1);
 543
 544         djvu_document->ps_filename = NULL;
 545         djvu_document->opts = g_string_new ("");
 546
 547         djvu_document->d_document = NULL;
 548 }
 549
 550 static void
 551 djvu_document_find_begin (EvDocumentFind   *document,
 552                           int               page,
 553                           const char       *search_string,
 554                           gboolean          case_sensitive)
 555 {
 556         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 557
 558         if (djvu_document->search &&
 559             strcmp (search_string, djvu_text_get_text (djvu_document->search)) == 0)
 560                 return;
 561
 562         if (djvu_document->search)
 563                 djvu_text_free (djvu_document->search);
 564
 565         djvu_document->search = djvu_text_new (djvu_document,
 566                                                           page,
 567                                                           case_sensitive,
 568                                                           search_string);
 569 }
 570
 571 static int
 572 djvu_document_find_get_n_results (EvDocumentFind *document_find, int page)
 573 {
 574         DjvuText *search = DJVU_DOCUMENT (document_find)->search;
 575
 576         if (search) {
 577                 return djvu_text_n_results (search, page);
 578         } else {
 579                 return 0;
 580         }
 581 }
 582
 583 static gboolean
 584 djvu_document_find_get_result (EvDocumentFind *document_find,
 585                                int             page,
 586                                int             n_result,
 587                                EvRectangle    *rectangle)
 588 {
 589         DjvuDocument *djvu_document = DJVU_DOCUMENT (document_find);
 590         DjvuText *search = djvu_document->search;
 591         EvRectangle *r;
 592         double width, height;
 593
 594         if (search == NULL)
 595                 return FALSE;
 596
 597         r = djvu_text_get_result (search, page, n_result);
 598         if (r == NULL)
 599                 return FALSE;
 600
 601         document_get_page_size (djvu_document, page, &width, &height);
 602         rectangle->x1 = r->x1 * SCALE_FACTOR;
 603         rectangle->y1 = height - r->y2 * SCALE_FACTOR;
 604         rectangle->x2 = r->x2 * SCALE_FACTOR;
 605         rectangle->y2 = height - r->y1 * SCALE_FACTOR;
 606
 607         return TRUE;
 608 }
 609
 610 static int
 611 djvu_document_find_page_has_results (EvDocumentFind *document_find,
 612                                     int             page)
 613 {
 614         DjvuText *search = DJVU_DOCUMENT (document_find)->search;
 615
 616         return search && djvu_text_has_results (search, page);
 617 }
 618
 619 static double
 620 djvu_document_find_get_progress (EvDocumentFind *document_find)
 621 {
 622         DjvuText *search = DJVU_DOCUMENT (document_find)->search;
 623
 624         if (search == NULL) {
 625                 return 0;
 626         }
 627
 628         return djvu_text_get_progress (search);
 629 }
 630
 631 static void
 632 djvu_document_find_cancel (EvDocumentFind *document)
 633 {
 634         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 635
 636         if (djvu_document->search) {
 637                 djvu_text_free (djvu_document->search);
 638                 djvu_document->search = NULL;
 639         }
 640 }
 641
 642 static void
 643 djvu_document_find_iface_init (EvDocumentFindIface *iface)
 644 {
 645         iface->begin = djvu_document_find_begin;
 646         iface->get_n_results = djvu_document_find_get_n_results;
 647         iface->get_result = djvu_document_find_get_result;
 648         iface->page_has_results = djvu_document_find_page_has_results;
 649         iface->get_progress = djvu_document_find_get_progress;
 650         iface->cancel = djvu_document_find_cancel;
 651 }
 652
 653 static GList *
 654 djvu_document_links_get_links (EvDocumentLinks *document_links,
 655                                gint             page)
 656 {
 657         return djvu_links_get_links (document_links, page, SCALE_FACTOR);
 658 }
 659
 660 static void
 661 djvu_document_document_links_iface_init  (EvDocumentLinksIface *iface)
 662 {
 663         iface->has_document_links = djvu_links_has_document_links;
 664         iface->get_links_model = djvu_links_get_links_model;
 665         iface->get_links = djvu_document_links_get_links;
 666         iface->find_link_dest = djvu_links_find_link_dest;
 667 }