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-page.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 #define EV_DJVU_ERROR ev_djvu_error_quark ()
  72
  73 static GQuark
  74 ev_djvu_error_quark (void)
  75 {
  76         static GQuark q = 0;
  77         if (q == 0)
  78                 q = g_quark_from_static_string ("ev-djvu-quark");
  79
  80         return q;
  81 }
  82
  83 static void
  84 handle_message (const ddjvu_message_t *msg, GError **error)
  85 {
  86         switch (msg->m_any.tag) {
  87                 case DDJVU_ERROR: {
  88                         gchar *error_str;
  89
  90                         if (msg->m_error.filename) {
  91                                 error_str = g_strdup_printf ("DjvuLibre error: %s:%d",
  92                                                              msg->m_error.filename,
  93                                                              msg->m_error.lineno);
  94                         } else {
  95                                 error_str = g_strdup_printf ("DjvuLibre error: %s",
  96                                                              msg->m_error.message);
  97                         }
  98
  99                         if (error) {
 100                                 g_set_error_literal (error, EV_DJVU_ERROR, 0, error_str);
 101                         } else {
 102                                 g_warning ("%s", error_str);
 103                         }
 104
 105                         g_free (error_str);
 106                         return;
 107                         }
 108                         break;
 109                 default:
 110                         break;
 111         }
 112 }
 113
 114 void
 115 djvu_handle_events (DjvuDocument *djvu_document, int wait, GError **error)
 116 {
 117         ddjvu_context_t *ctx = djvu_document->d_context;
 118         const ddjvu_message_t *msg;
 119
 120         if (!ctx)
 121                 return;
 122
 123         if (wait)
 124                 ddjvu_message_wait (ctx);
 125
 126         while ((msg = ddjvu_message_peek (ctx))) {
 127                 handle_message (msg, error);
 128                 ddjvu_message_pop (ctx);
 129                 if (error && *error)
 130                         return;
 131         }
 132 }
 133
 134 static void
 135 djvu_wait_for_message (DjvuDocument *djvu_document, ddjvu_message_tag_t message, GError **error)
 136 {
 137         ddjvu_context_t *ctx = djvu_document->d_context;
 138         const ddjvu_message_t *msg;
 139
 140         ddjvu_message_wait (ctx);
 141         while ((msg = ddjvu_message_peek (ctx)) && (msg->m_any.tag != message)) {
 142                 handle_message (msg, error);
 143                 ddjvu_message_pop (ctx);
 144                 if (error && *error)
 145                         return;
 146         }
 147         if (msg && msg->m_any.tag == message)
 148                 ddjvu_message_pop (ctx);
 149 }
 150
 151 static gboolean
 152 djvu_document_load (EvDocument  *document,
 153                     const char  *uri,
 154                     GError     **error)
 155 {
 156         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 157         ddjvu_document_t *doc;
 158         gchar *filename;
 159         gboolean missing_files = FALSE;
 160         GError *djvu_error = NULL;
 161
 162         /* FIXME: We could actually load uris  */
 163         filename = g_filename_from_uri (uri, NULL, error);
 164         if (!filename)
 165                 return FALSE;
 166
 167         doc = ddjvu_document_create_by_filename (djvu_document->d_context, filename, TRUE);
 168
 169         if (!doc) {
 170                 g_free (filename);
 171                 return FALSE;
 172         }
 173
 174         if (djvu_document->d_document)
 175             ddjvu_document_release (djvu_document->d_document);
 176
 177         djvu_document->d_document = doc;
 178
 179         djvu_wait_for_message (djvu_document, DDJVU_DOCINFO, &djvu_error);
 180         if (djvu_error) {
 181                 g_set_error_literal (error,
 182                                      EV_DOCUMENT_ERROR,
 183                                      EV_DOCUMENT_ERROR_INVALID,
 184                                      djvu_error->message);
 185                 g_error_free (djvu_error);
 186                 g_free (filename);
 187                 ddjvu_document_release (djvu_document->d_document);
 188                 djvu_document->d_document = NULL;
 189
 190                 return FALSE;
 191         }
 192
 193         if (ddjvu_document_decoding_error (djvu_document->d_document))
 194                 djvu_handle_events (djvu_document, TRUE, &djvu_error);
 195
 196         if (djvu_error) {
 197                 g_set_error_literal (error,
 198                                      EV_DOCUMENT_ERROR,
 199                                      EV_DOCUMENT_ERROR_INVALID,
 200                                      djvu_error->message);
 201                 g_error_free (djvu_error);
 202                 g_free (filename);
 203                 ddjvu_document_release (djvu_document->d_document);
 204                 djvu_document->d_document = NULL;
 205
 206                 return FALSE;
 207         }
 208
 209         g_free (djvu_document->uri);
 210         djvu_document->uri = g_strdup (uri);
 211
 212         if (ddjvu_document_get_type (djvu_document->d_document) == DDJVU_DOCTYPE_INDIRECT) {
 213                 gint n_files;
 214                 gint i;
 215                 gchar *base;
 216
 217                 base = g_path_get_dirname (filename);
 218
 219                 n_files = ddjvu_document_get_filenum (djvu_document->d_document);
 220                 for (i = 0; i < n_files; i++) {
 221                         struct ddjvu_fileinfo_s fileinfo;
 222                         gchar *file;
 223
 224                         ddjvu_document_get_fileinfo (djvu_document->d_document,
 225                                                      i, &fileinfo);
 226
 227                         if (fileinfo.type != 'P')
 228                                 continue;
 229
 230                         file = g_build_filename (base, fileinfo.id, NULL);
 231                         if (!g_file_test (file, G_FILE_TEST_EXISTS)) {
 232                                 missing_files = TRUE;
 233                                 g_free (file);
 234
 235                                 break;
 236                         }
 237                         g_free (file);
 238                 }
 239                 g_free (base);
 240         }
 241         g_free (filename);
 242
 243         if (missing_files) {
 244                 g_set_error (error,
 245                              G_FILE_ERROR,
 246                              G_FILE_ERROR_EXIST,
 247                              _("The document is composed by several files. "
 248                                "One or more of such files cannot be accessed."));
 249
 250                 return FALSE;
 251         }
 252
 253         return TRUE;
 254 }
 255
 256
 257 static gboolean
 258 djvu_document_save (EvDocument  *document,
 259                     const char  *uri,
 260                     GError     **error)
 261 {
 262         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 263
 264         return ev_xfer_uri_simple (djvu_document->uri, uri, error);
 265 }
 266
 267 int
 268 djvu_document_get_n_pages (EvDocument  *document)
 269 {
 270         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 271
 272         g_return_val_if_fail (djvu_document->d_document, 0);
 273
 274         return ddjvu_document_get_pagenum (djvu_document->d_document);
 275 }
 276
 277 static void
 278 document_get_page_size (DjvuDocument *djvu_document,
 279                         gint          page,
 280                         double       *width,
 281                         double       *height)
 282 {
 283         ddjvu_pageinfo_t info;
 284         ddjvu_status_t r;
 285
 286         while ((r = ddjvu_document_get_pageinfo(djvu_document->d_document, page, &info)) < DDJVU_JOB_OK)
 287                 djvu_handle_events(djvu_document, TRUE, NULL);
 288
 289         if (r >= DDJVU_JOB_FAILED)
 290                 djvu_handle_events(djvu_document, TRUE, NULL);
 291
 292         *width = info.width * SCALE_FACTOR;
 293         *height = info.height * SCALE_FACTOR;
 294 }
 295
 296 static void
 297 djvu_document_get_page_size (EvDocument   *document,
 298                              EvPage       *page,
 299                              double       *width,
 300                              double       *height)
 301 {
 302         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 303
 304         g_return_if_fail (djvu_document->d_document);
 305
 306         document_get_page_size (djvu_document, page->index,
 307                                 width, height);
 308 }
 309
 310 static cairo_surface_t *
 311 djvu_document_render (EvDocument      *document,
 312                       EvRenderContext *rc)
 313 {
 314         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 315         cairo_surface_t *surface;
 316         gchar *pixels;
 317         gint   rowstride;
 318         ddjvu_rect_t rrect;
 319         ddjvu_rect_t prect;
 320         ddjvu_page_t *d_page;
 321         ddjvu_page_rotation_t rotation;
 322         double page_width, page_height, tmp;
 323         static const cairo_user_data_key_t key;
 324
 325         d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, rc->page->index);
 326
 327         while (!ddjvu_page_decoding_done (d_page))
 328                 djvu_handle_events(djvu_document, TRUE, NULL);
 329
 330         page_width = ddjvu_page_get_width (d_page) * rc->scale * SCALE_FACTOR + 0.5;
 331         page_height = ddjvu_page_get_height (d_page) * rc->scale * SCALE_FACTOR + 0.5;
 332
 333         switch (rc->rotation) {
 334                 case 90:
 335                         rotation = DDJVU_ROTATE_90;
 336                         tmp = page_height;
 337                         page_height = page_width;
 338                         page_width = tmp;
 339
 340                         break;
 341                 case 180:
 342                         rotation = DDJVU_ROTATE_180;
 343
 344                         break;
 345                 case 270:
 346                         rotation = DDJVU_ROTATE_270;
 347                         tmp = page_height;
 348                         page_height = page_width;
 349                         page_width = tmp;
 350
 351                         break;
 352                 default:
 353                         rotation = DDJVU_ROTATE_0;
 354         }
 355 #ifdef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
 356         rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, page_width);
 357 #else
 358         rowstride = page_width * 4;
 359 #endif
 360         pixels = (gchar *) g_malloc (page_height * rowstride);
 361         surface = cairo_image_surface_create_for_data ((guchar *)pixels,
 362                                                        CAIRO_FORMAT_RGB24,
 363                                                        page_width,
 364                                                        page_height,
 365                                                        rowstride);
 366         cairo_surface_set_user_data (surface, &key,
 367                                      pixels, (cairo_destroy_func_t)g_free);
 368         prect.x = 0;
 369         prect.y = 0;
 370         prect.w = page_width;
 371         prect.h = page_height;
 372         rrect = prect;
 373
 374         ddjvu_page_set_rotation (d_page, rotation);
 375
 376         ddjvu_page_render (d_page, DDJVU_RENDER_COLOR,
 377                            &prect,
 378                            &rrect,
 379                            djvu_document->d_format,
 380                            rowstride,
 381                            pixels);
 382
 383         return surface;
 384 }
 385
 386 static void
 387 djvu_document_finalize (GObject *object)
 388 {
 389         DjvuDocument *djvu_document = DJVU_DOCUMENT (object);
 390
 391         if (djvu_document->d_document)
 392             ddjvu_document_release (djvu_document->d_document);
 393
 394         if (djvu_document->opts)
 395             g_string_free (djvu_document->opts, TRUE);
 396
 397         if (djvu_document->ps_filename)
 398             g_free (djvu_document->ps_filename);
 399
 400         ddjvu_context_release (djvu_document->d_context);
 401         ddjvu_format_release (djvu_document->d_format);
 402         ddjvu_format_release (djvu_document->thumbs_format);
 403         g_free (djvu_document->uri);
 404
 405         G_OBJECT_CLASS (djvu_document_parent_class)->finalize (object);
 406 }
 407
 408 static void
 409 djvu_document_class_init (DjvuDocumentClass *klass)
 410 {
 411         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 412
 413         gobject_class->finalize = djvu_document_finalize;
 414 }
 415
 416 static EvDocumentInfo *
 417 djvu_document_get_info (EvDocument *document)
 418 {
 419         EvDocumentInfo *info;
 420
 421         info = g_new0 (EvDocumentInfo, 1);
 422
 423         return info;
 424 }
 425
 426 static void
 427 djvu_document_document_iface_init (EvDocumentIface *iface)
 428 {
 429         iface->load = djvu_document_load;
 430         iface->save = djvu_document_save;
 431         iface->get_n_pages = djvu_document_get_n_pages;
 432         iface->get_page_size = djvu_document_get_page_size;
 433         iface->render = djvu_document_render;
 434         iface->get_info = djvu_document_get_info;
 435 }
 436
 437 static gchar *
 438 djvu_text_copy (DjvuDocument *djvu_document,
 439                 gint           page,
 440                 EvRectangle  *rectangle)
 441 {
 442         miniexp_t page_text;
 443         gchar    *text = NULL;
 444
 445         while ((page_text =
 446                 ddjvu_document_get_pagetext (djvu_document->d_document,
 447                                              page, "char")) == miniexp_dummy)
 448                 djvu_handle_events (djvu_document, TRUE, NULL);
 449
 450         if (page_text != miniexp_nil) {
 451                 DjvuTextPage *page = djvu_text_page_new (page_text);
 452
 453                 text = djvu_text_page_copy (page, rectangle);
 454                 djvu_text_page_free (page);
 455                 ddjvu_miniexp_release (djvu_document->d_document, page_text);
 456         }
 457
 458         return text;
 459 }
 460
 461 static gchar *
 462 djvu_selection_get_selected_text (EvSelection     *selection,
 463                                   EvRenderContext *rc,
 464                                   EvSelectionStyle style,
 465                                   EvRectangle     *points)
 466 {
 467         DjvuDocument *djvu_document = DJVU_DOCUMENT (selection);
 468         double width, height;
 469         EvRectangle rectangle;
 470         gchar *text;
 471
 472         djvu_document_get_page_size (EV_DOCUMENT (djvu_document),
 473                                      rc->page, &width, &height);
 474         rectangle.x1 = points->x1 / SCALE_FACTOR;
 475         rectangle.y1 = (height - points->y2) / SCALE_FACTOR;
 476         rectangle.x2 = points->x2 / SCALE_FACTOR;
 477         rectangle.y2 = (height - points->y1) / SCALE_FACTOR;
 478
 479         text = djvu_text_copy (djvu_document, rc->page->index, &rectangle);
 480
 481         if (text == NULL)
 482                 text = g_strdup ("");
 483
 484         return text;
 485 }
 486
 487 static void
 488 djvu_selection_iface_init (EvSelectionIface *iface)
 489 {
 490         iface->get_selected_text = djvu_selection_get_selected_text;
 491 }
 492
 493 static void
 494 djvu_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
 495                                          EvRenderContext      *rc,
 496                                          gint                 *width,
 497                                          gint                 *height)
 498 {
 499         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 500         gdouble page_width, page_height;
 501
 502         djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
 503                                      &page_width, &page_height);
 504
 505         if (rc->rotation == 90 || rc->rotation == 270) {
 506                 *width = (gint) (page_height * rc->scale);
 507                 *height = (gint) (page_width * rc->scale);
 508         } else {
 509                 *width = (gint) (page_width * rc->scale);
 510                 *height = (gint) (page_height * rc->scale);
 511         }
 512 }
 513
 514 static GdkPixbuf *
 515 djvu_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
 516                                         EvRenderContext      *rc,
 517                                         gboolean              border)
 518 {
 519         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 520         GdkPixbuf *pixbuf, *rotated_pixbuf;
 521         gdouble page_width, page_height;
 522         gint thumb_width, thumb_height;
 523         guchar *pixels;
 524
 525         g_return_val_if_fail (djvu_document->d_document, NULL);
 526
 527         djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
 528                                      &page_width, &page_height);
 529
 530         thumb_width = (gint) (page_width * rc->scale);
 531         thumb_height = (gint) (page_height * rc->scale);
 532
 533         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
 534                                  thumb_width, thumb_height);
 535         gdk_pixbuf_fill (pixbuf, 0xffffffff);
 536         pixels = gdk_pixbuf_get_pixels (pixbuf);
 537
 538         while (ddjvu_thumbnail_status (djvu_document->d_document, rc->page->index, 1) < DDJVU_JOB_OK)
 539                 djvu_handle_events(djvu_document, TRUE, NULL);
 540
 541         ddjvu_thumbnail_render (djvu_document->d_document, rc->page->index,
 542                                 &thumb_width, &thumb_height,
 543                                 djvu_document->thumbs_format,
 544                                 gdk_pixbuf_get_rowstride (pixbuf),
 545                                 (gchar *)pixels);
 546
 547         rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
 548         g_object_unref (pixbuf);
 549
 550         if (border) {
 551               GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
 552
 553               rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
 554               g_object_unref (tmp_pixbuf);
 555         }
 556
 557         return rotated_pixbuf;
 558 }
 559
 560 static void
 561 djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 562 {
 563         iface->get_thumbnail = djvu_document_thumbnails_get_thumbnail;
 564         iface->get_dimensions = djvu_document_thumbnails_get_dimensions;
 565 }
 566
 567 /* EvFileExporterIface */
 568 static void
 569 djvu_document_file_exporter_begin (EvFileExporter        *exporter,
 570                                    EvFileExporterContext *fc)
 571 {
 572         DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
 573
 574         if (djvu_document->ps_filename)
 575                 g_free (djvu_document->ps_filename);
 576         djvu_document->ps_filename = g_strdup (fc->filename);
 577
 578         g_string_assign (djvu_document->opts, "-page=");
 579 }
 580
 581 static void
 582 djvu_document_file_exporter_do_page (EvFileExporter  *exporter,
 583                                      EvRenderContext *rc)
 584 {
 585         DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
 586
 587         g_string_append_printf (djvu_document->opts, "%d,", (rc->page->index) + 1);
 588 }
 589
 590 static void
 591 djvu_document_file_exporter_end (EvFileExporter *exporter)
 592 {
 593         int d_optc = 1;
 594         const char *d_optv[d_optc];
 595
 596         DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
 597
 598         FILE *fn = fopen (djvu_document->ps_filename, "w");
 599         if (fn == NULL) {
 600                 g_warning ("Cannot open file “%s”.", djvu_document->ps_filename);
 601                 return;
 602         }
 603
 604         d_optv[0] = djvu_document->opts->str;
 605
 606         ddjvu_job_t * job = ddjvu_document_print(djvu_document->d_document, fn, d_optc, d_optv);
 607         while (!ddjvu_job_done(job)) {
 608                 djvu_handle_events (djvu_document, TRUE, NULL);
 609         }
 610
 611         fclose(fn);
 612 }
 613
 614 static EvFileExporterCapabilities
 615 djvu_document_file_exporter_get_capabilities (EvFileExporter *exporter)
 616 {
 617         return  EV_FILE_EXPORTER_CAN_PAGE_SET |
 618                 EV_FILE_EXPORTER_CAN_COPIES |
 619                 EV_FILE_EXPORTER_CAN_COLLATE |
 620                 EV_FILE_EXPORTER_CAN_REVERSE |
 621                 EV_FILE_EXPORTER_CAN_GENERATE_PS;
 622 }
 623
 624 static void
 625 djvu_document_file_exporter_iface_init (EvFileExporterIface *iface)
 626 {
 627         iface->begin = djvu_document_file_exporter_begin;
 628         iface->do_page = djvu_document_file_exporter_do_page;
 629         iface->end = djvu_document_file_exporter_end;
 630         iface->get_capabilities = djvu_document_file_exporter_get_capabilities;
 631 }
 632
 633 static void
 634 djvu_document_init (DjvuDocument *djvu_document)
 635 {
 636         guint masks[4] = { 0xff0000, 0xff00, 0xff, 0xff000000 };
 637
 638         djvu_document->d_context = ddjvu_context_create ("Evince");
 639         djvu_document->d_format = ddjvu_format_create (DDJVU_FORMAT_RGBMASK32, 4, masks);
 640         ddjvu_format_set_row_order (djvu_document->d_format, 1);
 641
 642         djvu_document->thumbs_format = ddjvu_format_create (DDJVU_FORMAT_RGB24, 0, 0);
 643         ddjvu_format_set_row_order (djvu_document->thumbs_format, 1);
 644
 645         djvu_document->ps_filename = NULL;
 646         djvu_document->opts = g_string_new ("");
 647
 648         djvu_document->d_document = NULL;
 649 }
 650
 651 static GList *
 652 djvu_document_find_find_text (EvDocumentFind   *document,
 653                               EvPage           *page,
 654                               const char       *text,
 655                               gboolean          case_sensitive)
 656 {
 657         DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
 658         miniexp_t page_text;
 659         gdouble width, height;
 660         GList *matches = NULL, *l;
 661
 662         g_return_val_if_fail (text != NULL, NULL);
 663
 664         while ((page_text = ddjvu_document_get_pagetext (djvu_document->d_document,
 665                                                          page->index,
 666                                                          "char")) == miniexp_dummy)
 667                 djvu_handle_events (djvu_document, TRUE, NULL);
 668
 669         if (page_text != miniexp_nil) {
 670                 DjvuTextPage *tpage = djvu_text_page_new (page_text);
 671
 672                 djvu_text_page_prepare_search (tpage, case_sensitive);
 673                 if (tpage->links->len > 0) {
 674                         djvu_text_page_search (tpage, text);
 675                         matches = tpage->results;
 676                 }
 677                 djvu_text_page_free (tpage);
 678                 ddjvu_miniexp_release (djvu_document->d_document, page_text);
 679         }
 680
 681         if (!matches)
 682                 return NULL;
 683
 684         document_get_page_size (djvu_document, page->index, &width, &height);
 685         for (l = matches; l && l->data; l = g_list_next (l)) {
 686                 EvRectangle *r = (EvRectangle *)l->data;
 687                 gdouble      tmp;
 688
 689                 tmp = r->y1;
 690
 691                 r->x1 *= SCALE_FACTOR;
 692                 r->x2 *= SCALE_FACTOR;
 693
 694                 tmp = r->y1;
 695                 r->y1 = height - r->y2 * SCALE_FACTOR;
 696                 r->y2 = height - tmp * SCALE_FACTOR;
 697         }
 698
 699
 700         return matches;
 701 }
 702
 703 static void
 704 djvu_document_find_iface_init (EvDocumentFindIface *iface)
 705 {
 706         iface->find_text = djvu_document_find_find_text;
 707 }
 708
 709 static GList *
 710 djvu_document_links_get_links (EvDocumentLinks *document_links,
 711                                gint             page)
 712 {
 713         return djvu_links_get_links (document_links, page, SCALE_FACTOR);
 714 }
 715
 716 static void
 717 djvu_document_document_links_iface_init  (EvDocumentLinksIface *iface)
 718 {
 719         iface->has_document_links = djvu_links_has_document_links;
 720         iface->get_links_model = djvu_links_get_links_model;
 721         iface->get_links = djvu_document_links_get_links;
 722         iface->find_link_dest = djvu_links_find_link_dest;
 723 }