pdf/ev-poppler.cc

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* pdfdocument.h: Implementation of EvDocument for PDF
   3  * Copyright (C) 2004, Red Hat, Inc.
   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 <math.h>
  21 #include <string.h>
  22 #include <gtk/gtk.h>
  23 #include <poppler.h>
  24 #include <poppler-document.h>
  25 #include <poppler-page.h>
  26
  27 #include "ev-poppler.h"
  28 #include "ev-ps-exporter.h"
  29 #include "ev-document-find.h"
  30 #include "ev-document-misc.h"
  31 #include "ev-document-links.h"
  32 #include "ev-document-security.h"
  33 #include "ev-document-thumbnails.h"
  34
  35 typedef struct {
  36         PdfDocument *document;
  37         char *text;
  38         GList **pages;
  39         guint idle;
  40         int start_page;
  41         int search_page;
  42 } PdfDocumentSearch;
  43
  44 struct _PdfDocumentClass
  45 {
  46         GObjectClass parent_class;
  47 };
  48
  49 struct _PdfDocument
  50 {
  51         GObject parent_instance;
  52
  53         PopplerDocument *document;
  54         PopplerPSFile *ps_file;
  55         gchar *password;
  56
  57         PdfDocumentSearch *search;
  58 };
  59
  60 static void pdf_document_document_iface_init            (EvDocumentIface           *iface);
  61 static void pdf_document_security_iface_init            (EvDocumentSecurityIface   *iface);
  62 static void pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  63 static void pdf_document_document_links_iface_init      (EvDocumentLinksIface      *iface);
  64 static void pdf_document_find_iface_init                (EvDocumentFindIface       *iface);
  65 static void pdf_document_ps_exporter_iface_init         (EvPSExporterIface         *iface);
  66 static void pdf_document_thumbnails_get_dimensions      (EvDocumentThumbnails      *document_thumbnails,
  67                                                          gint                       page,
  68                                                          gint                       size,
  69                                                          gint                      *width,
  70                                                          gint                      *height);
  71 static EvLink * ev_link_from_action (PopplerAction *action);
  72
  73
  74 G_DEFINE_TYPE_WITH_CODE (PdfDocument, pdf_document, G_TYPE_OBJECT,
  75                          {
  76                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  77                                                         pdf_document_document_iface_init);
  78                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_SECURITY,
  79                                                         pdf_document_security_iface_init);
  80                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
  81                                                         pdf_document_document_thumbnails_iface_init);
  82                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS,
  83                                                         pdf_document_document_links_iface_init);
  84                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND,
  85                                                         pdf_document_find_iface_init);
  86                                  G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
  87                                                         pdf_document_ps_exporter_iface_init);
  88                          });
  89
  90 static void
  91 pdf_document_class_init (PdfDocumentClass *klass)
  92 {
  93 }
  94
  95 static void
  96 pdf_document_init (PdfDocument *pdf_document)
  97 {
  98         pdf_document->password = NULL;
  99 }
 100
 101 static void
 102 convert_error (GError  *poppler_error,
 103                GError **error)
 104 {
 105         if (poppler_error == NULL)
 106                 return;
 107
 108         if (poppler_error->domain == POPPLER_ERROR) {
 109                 /* convert poppler errors into EvDocument errors */
 110                 gint code = EV_DOCUMENT_ERROR_INVALID;
 111                 if (poppler_error->code == POPPLER_ERROR_INVALID)
 112                         code = EV_DOCUMENT_ERROR_INVALID;
 113                 else if (poppler_error->code == POPPLER_ERROR_ENCRYPTED)
 114                         code = EV_DOCUMENT_ERROR_ENCRYPTED;
 115
 116
 117                 g_set_error (error,
 118                              EV_DOCUMENT_ERROR,
 119                              code,
 120                              poppler_error->message,
 121                              NULL);
 122         } else {
 123                 g_propagate_error (error, poppler_error);
 124         }
 125 }
 126
 127
 128 /* EvDocument */
 129 static gboolean
 130 pdf_document_save (EvDocument  *document,
 131                    const char  *uri,
 132                    GError     **error)
 133 {
 134         gboolean retval;
 135         GError *poppler_error = NULL;
 136
 137         retval = poppler_document_save (PDF_DOCUMENT (document)->document,
 138                                         uri,
 139                                         &poppler_error);
 140         if (! retval)
 141                 convert_error (poppler_error, error);
 142
 143         return retval;
 144 }
 145
 146 static gboolean
 147 pdf_document_load (EvDocument   *document,
 148                    const char   *uri,
 149                    GError      **error)
 150 {
 151         GError *poppler_error = NULL;
 152         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 153
 154         pdf_document->document =
 155                 poppler_document_new_from_file (uri, pdf_document->password, &poppler_error);
 156
 157         if (pdf_document->document == NULL) {
 158                 convert_error (poppler_error, error);
 159                 return FALSE;
 160         }
 161
 162         return TRUE;
 163 }
 164
 165 static int
 166 pdf_document_get_n_pages (EvDocument *document)
 167 {
 168         return poppler_document_get_n_pages (PDF_DOCUMENT (document)->document);
 169 }
 170
 171 static void
 172 pdf_document_get_page_size (EvDocument   *document,
 173                             int           page,
 174                             double       *width,
 175                             double       *height)
 176 {
 177         PopplerPage *poppler_page;
 178
 179         poppler_page = poppler_document_get_page (PDF_DOCUMENT (document)->document,
 180                                                   page);
 181
 182         poppler_page_get_size (poppler_page, width, height);
 183 }
 184
 185 static char *
 186 pdf_document_get_page_label (EvDocument *document,
 187                              int         page)
 188 {
 189         PopplerPage *poppler_page;
 190         char *label = NULL;
 191
 192         poppler_page = poppler_document_get_page (PDF_DOCUMENT (document)->document,
 193                                                   page);
 194
 195         g_object_get (poppler_page,
 196                       "label", &label,
 197                       NULL);
 198
 199         return label;
 200 }
 201
 202 static GList *
 203 pdf_document_get_links (EvDocument *document,
 204                         int         page)
 205 {
 206         PdfDocument *pdf_document;
 207         PopplerPage *poppler_page;
 208         GList *retval = NULL;
 209         GList *mapping_list;
 210         GList *list;
 211         double height;
 212
 213         pdf_document = PDF_DOCUMENT (document);
 214         poppler_page = poppler_document_get_page (pdf_document->document,
 215                                                   page);
 216         mapping_list = poppler_page_get_link_mapping (poppler_page);
 217         poppler_page_get_size (poppler_page, NULL, &height);
 218
 219         for (list = mapping_list; list; list = list->next) {
 220                 PopplerLinkMapping *link_mapping;
 221                 EvLinkMapping *ev_link_mapping;
 222
 223                 link_mapping = (PopplerLinkMapping *)list->data;
 224                 ev_link_mapping = g_new (EvLinkMapping, 1);
 225                 ev_link_mapping->link = ev_link_from_action (link_mapping->action);
 226                 ev_link_mapping->x1 = link_mapping->area.x1;
 227                 ev_link_mapping->x2 = link_mapping->area.x2;
 228                 /* Invert this for X-style coordinates */
 229                 ev_link_mapping->y1 = height - link_mapping->area.y2;
 230                 ev_link_mapping->y2 = height - link_mapping->area.y1;
 231
 232                 retval = g_list_prepend (retval, ev_link_mapping);
 233         }
 234
 235         poppler_page_free_link_mapping (mapping_list);
 236
 237         return g_list_reverse (retval);
 238 }
 239
 240
 241 static GdkPixbuf *
 242 pdf_document_render_pixbuf (EvDocument   *document,
 243                             int           page,
 244                             double        scale)
 245 {
 246         PdfDocument *pdf_document;
 247         PopplerPage *poppler_page;
 248         GdkPixbuf *pixbuf;
 249         double width_points, height_points;
 250         gint width, height;
 251
 252         pdf_document = PDF_DOCUMENT (document);
 253         poppler_page = poppler_document_get_page (pdf_document->document,
 254                                                   page);
 255
 256         poppler_page_get_size (poppler_page, &width_points, &height_points);
 257         width = (int) ceil (width_points * scale);
 258         height = (int) ceil (height_points * scale);
 259
 260         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 261                                  FALSE, 8,
 262                                  width, height);
 263
 264         poppler_page_render_to_pixbuf (poppler_page,
 265                                        0, 0,
 266                                        width, height,
 267                                        scale,
 268                                        pixbuf,
 269                                        0, 0);
 270
 271         return pixbuf;
 272 }
 273
 274 /* EvDocumentSecurity */
 275
 276 static gboolean
 277 pdf_document_has_document_security (EvDocumentSecurity *document_security)
 278 {
 279         /* FIXME: do we really need to have this? */
 280         return FALSE;
 281 }
 282
 283 static void
 284 pdf_document_set_password (EvDocumentSecurity *document_security,
 285                            const char         *password)
 286 {
 287         PdfDocument *document = PDF_DOCUMENT (document_security);
 288
 289         if (document->password)
 290                 g_free (document->password);
 291
 292         document->password = g_strdup (password);
 293 }
 294
 295 static gboolean
 296 pdf_document_can_get_text (EvDocument *document)
 297 {
 298         return TRUE;
 299 }
 300
 301 static EvDocumentInfo *
 302 pdf_document_get_info (EvDocument *document)
 303 {
 304         EvDocumentInfo *info;
 305         PopplerPageLayout layout;
 306         PopplerPageMode mode;
 307         PopplerViewerPreferences view_prefs;
 308
 309         info = g_new0 (EvDocumentInfo, 1);
 310
 311         info->fields_mask = EV_DOCUMENT_INFO_TITLE |
 312                             EV_DOCUMENT_INFO_FORMAT |
 313                             EV_DOCUMENT_INFO_AUTHOR |
 314                             EV_DOCUMENT_INFO_SUBJECT |
 315                             EV_DOCUMENT_INFO_KEYWORDS |
 316                             EV_DOCUMENT_INFO_LAYOUT |
 317                             EV_DOCUMENT_INFO_START_MODE |
 318                             /* Missing EV_DOCUMENT_INFO_CREATION_DATE | */
 319                             EV_DOCUMENT_INFO_UI_HINTS;
 320
 321
 322         g_object_get (PDF_DOCUMENT (document)->document,
 323                       "title", &(info->title),
 324                       "format", &(info->format),
 325                       "author", &(info->author),
 326                       "subject", &(info->subject),
 327                       "keywords", &(info->keywords),
 328                       "page-mode", &mode,
 329                       "page-layout", &layout,
 330                       "viewer-preferences", &view_prefs,
 331                       NULL);
 332
 333         switch (layout) {
 334                 case POPPLER_PAGE_LAYOUT_SINGLE_PAGE:
 335                         info->layout = EV_DOCUMENT_LAYOUT_SINGLE_PAGE;
 336                         break;
 337                 case POPPLER_PAGE_LAYOUT_ONE_COLUMN:
 338                         info->layout = EV_DOCUMENT_LAYOUT_ONE_COLUMN;
 339                         break;
 340                 case POPPLER_PAGE_LAYOUT_TWO_COLUMN_LEFT:
 341                         info->layout = EV_DOCUMENT_LAYOUT_TWO_COLUMN_LEFT;
 342                         break;
 343                 case POPPLER_PAGE_LAYOUT_TWO_COLUMN_RIGHT:
 344                         info->layout = EV_DOCUMENT_LAYOUT_TWO_COLUMN_RIGHT;
 345                 case POPPLER_PAGE_LAYOUT_TWO_PAGE_LEFT:
 346                         info->layout = EV_DOCUMENT_LAYOUT_TWO_PAGE_LEFT;
 347                         break;
 348                 case POPPLER_PAGE_LAYOUT_TWO_PAGE_RIGHT:
 349                         info->layout = EV_DOCUMENT_LAYOUT_TWO_PAGE_RIGHT;
 350                         break;
 351         }
 352
 353         switch (mode) {
 354                 case POPPLER_PAGE_MODE_NONE:
 355                         info->mode = EV_DOCUMENT_MODE_NONE;
 356                         break;
 357                 case POPPLER_PAGE_MODE_USE_THUMBS:
 358                         info->mode = EV_DOCUMENT_MODE_USE_THUMBS;
 359                         break;
 360                 case POPPLER_PAGE_MODE_USE_OC:
 361                         info->mode = EV_DOCUMENT_MODE_USE_OC;
 362                         break;
 363                 case POPPLER_PAGE_MODE_FULL_SCREEN:
 364                         info->mode = EV_DOCUMENT_MODE_FULL_SCREEN;
 365                         break;
 366                 case POPPLER_PAGE_MODE_USE_ATTACHMENTS:
 367                         info->mode = EV_DOCUMENT_MODE_USE_ATTACHMENTS;
 368         }
 369
 370         info->ui_hints = 0;
 371         if (view_prefs & POPPLER_VIEWER_PREFERENCES_HIDE_TOOLBAR) {
 372                 info->ui_hints |= EV_DOCUMENT_UI_HINT_HIDE_TOOLBAR;
 373         }
 374         if (view_prefs & POPPLER_VIEWER_PREFERENCES_HIDE_MENUBAR) {
 375                 info->ui_hints |= EV_DOCUMENT_UI_HINT_HIDE_MENUBAR;
 376         }
 377         if (view_prefs & POPPLER_VIEWER_PREFERENCES_HIDE_WINDOWUI) {
 378                 info->ui_hints |= EV_DOCUMENT_UI_HINT_HIDE_WINDOWUI;
 379         }
 380         if (view_prefs & POPPLER_VIEWER_PREFERENCES_FIT_WINDOW) {
 381                 info->ui_hints |= EV_DOCUMENT_UI_HINT_FIT_WINDOW;
 382         }
 383         if (view_prefs & POPPLER_VIEWER_PREFERENCES_CENTER_WINDOW) {
 384                 info->ui_hints |= EV_DOCUMENT_UI_HINT_CENTER_WINDOW;
 385         }
 386         if (view_prefs & POPPLER_VIEWER_PREFERENCES_DISPLAY_DOC_TITLE) {
 387                 info->ui_hints |= EV_DOCUMENT_UI_HINT_DISPLAY_DOC_TITLE;
 388         }
 389         if (view_prefs & POPPLER_VIEWER_PREFERENCES_DIRECTION_RTL) {
 390                 info->ui_hints |=  EV_DOCUMENT_UI_HINT_DIRECTION_RTL;
 391         }
 392
 393         return info;
 394 }
 395
 396 static char *
 397 pdf_document_get_text (EvDocument *document, int page, EvRectangle *rect)
 398 {
 399         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 400         PopplerPage *poppler_page;
 401         PopplerRectangle r;
 402         double height;
 403
 404         poppler_page = poppler_document_get_page (pdf_document->document, page);
 405         g_return_val_if_fail (poppler_page != NULL, NULL);
 406
 407         poppler_page_get_size (poppler_page, NULL, &height);
 408         r.x1 = rect->x1;
 409         r.y1 = height - rect->y2;
 410         r.x2 = rect->x2;
 411         r.y2 = height - rect->y1;
 412
 413         return poppler_page_get_text (poppler_page, &r);
 414 }
 415
 416 static void
 417 pdf_document_document_iface_init (EvDocumentIface *iface)
 418 {
 419         iface->save = pdf_document_save;
 420         iface->load = pdf_document_load;
 421         iface->get_n_pages = pdf_document_get_n_pages;
 422         iface->get_page_size = pdf_document_get_page_size;
 423         iface->get_page_label = pdf_document_get_page_label;
 424         iface->get_links = pdf_document_get_links;
 425         iface->render_pixbuf = pdf_document_render_pixbuf;
 426         iface->get_text = pdf_document_get_text;
 427         iface->can_get_text = pdf_document_can_get_text;
 428         iface->get_info = pdf_document_get_info;
 429 };
 430
 431 static void
 432 pdf_document_security_iface_init (EvDocumentSecurityIface *iface)
 433 {
 434         iface->has_document_security = pdf_document_has_document_security;
 435         iface->set_password = pdf_document_set_password;
 436 }
 437
 438 static gboolean
 439 pdf_document_links_has_document_links (EvDocumentLinks *document_links)
 440 {
 441         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 442         PopplerIndexIter *iter;
 443
 444         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 445
 446         iter = poppler_index_iter_new (pdf_document->document);
 447         if (iter == NULL)
 448                 return FALSE;
 449         poppler_index_iter_free (iter);
 450
 451         return TRUE;
 452 }
 453
 454 static EvLink *
 455 ev_link_from_action (PopplerAction *action)
 456 {
 457         EvLink *link;
 458         const char *title;
 459
 460         title = action->any.title;
 461
 462         if (action->type == POPPLER_ACTION_GOTO_DEST) {
 463                 link = ev_link_new_page (title, action->goto_dest.dest->page_num - 1);
 464         } else if (action->type == POPPLER_ACTION_URI) {
 465                 link = ev_link_new_external (title, action->uri.uri);
 466         } else {
 467                 link = ev_link_new_title (title);
 468         }
 469
 470         return link;
 471 }
 472
 473
 474 static void
 475 build_tree (PdfDocument      *pdf_document,
 476             GtkTreeModel     *model,
 477             GtkTreeIter      *parent,
 478             PopplerIndexIter *iter)
 479 {
 480
 481         do {
 482                 GtkTreeIter tree_iter;
 483                 PopplerIndexIter *child;
 484                 PopplerAction *action;
 485                 EvLink *link;
 486
 487                 action = poppler_index_iter_get_action (iter);
 488                 if (action) {
 489                         gtk_tree_store_append (GTK_TREE_STORE (model), &tree_iter, parent);
 490                         link = ev_link_from_action (action);
 491                         poppler_action_free (action);
 492
 493                         gtk_tree_store_set (GTK_TREE_STORE (model), &tree_iter,
 494                                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, ev_link_get_title (link),
 495                                             EV_DOCUMENT_LINKS_COLUMN_LINK, link,
 496                                             -1);
 497                         child = poppler_index_iter_get_child (iter);
 498                         if (child)
 499                                 build_tree (pdf_document, model, &tree_iter, child);
 500                         poppler_index_iter_free (child);
 501                 }
 502         } while (poppler_index_iter_next (iter));
 503 }
 504
 505
 506 static GtkTreeModel *
 507 pdf_document_links_get_links_model (EvDocumentLinks *document_links)
 508 {
 509         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 510         GtkTreeModel *model = NULL;
 511         PopplerIndexIter *iter;
 512
 513         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), NULL);
 514
 515         iter = poppler_index_iter_new (pdf_document->document);
 516         /* Create the model iff we have items*/
 517         if (iter != NULL) {
 518                 model = (GtkTreeModel *) gtk_tree_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 519                                                              G_TYPE_STRING,
 520                                                              G_TYPE_POINTER);
 521                 build_tree (pdf_document, model, NULL, iter);
 522                 poppler_index_iter_free (iter);
 523         }
 524
 525
 526         return model;
 527 }
 528
 529
 530 static void
 531 pdf_document_document_links_iface_init (EvDocumentLinksIface *iface)
 532 {
 533         iface->has_document_links = pdf_document_links_has_document_links;
 534         iface->get_links_model = pdf_document_links_get_links_model;
 535 }
 536
 537
 538 static GdkPixbuf *
 539 make_thumbnail_for_size (PdfDocument *pdf_document,
 540                          gint         page,
 541                          gint         size,
 542                          gboolean     border)
 543 {
 544         PopplerPage *poppler_page;
 545         GdkPixbuf *pixbuf;
 546         int width, height;
 547         int x_offset, y_offset;
 548         double scale;
 549         gdouble unscaled_width, unscaled_height;
 550
 551         poppler_page = poppler_document_get_page (pdf_document->document, page);
 552
 553         g_return_val_if_fail (poppler_page != NULL, NULL);
 554
 555         pdf_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (pdf_document), page, size, &width, &height);
 556         poppler_page_get_size (poppler_page, &unscaled_width, &unscaled_height);
 557         scale = width / unscaled_width;
 558
 559         if (border) {
 560                 pixbuf = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 561                 x_offset = 1;
 562                 y_offset = 1;
 563         } else {
 564                 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 565                                          width, height);
 566                 gdk_pixbuf_fill (pixbuf, 0xffffffff);
 567                 x_offset = 0;
 568                 y_offset = 0;
 569         }
 570
 571         poppler_page_render_to_pixbuf (poppler_page, 0, 0,
 572                                        width, height,
 573                                        scale, pixbuf,
 574                                        x_offset, y_offset);
 575
 576         return pixbuf;
 577 }
 578
 579 static GdkPixbuf *
 580 pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
 581                                        gint                  page,
 582                                        gint                  size,
 583                                        gboolean              border)
 584 {
 585         PdfDocument *pdf_document;
 586         PopplerPage *poppler_page;
 587         GdkPixbuf *pixbuf;
 588
 589         pdf_document = PDF_DOCUMENT (document_thumbnails);
 590
 591         poppler_page = poppler_document_get_page (pdf_document->document, page);
 592         g_return_val_if_fail (poppler_page != NULL, NULL);
 593
 594         pixbuf = poppler_page_get_thumbnail (poppler_page);
 595         if (pixbuf != NULL) {
 596                 /* The document provides its own thumbnails. */
 597                 if (border) {
 598                         GdkPixbuf *real_pixbuf;
 599
 600                         real_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, pixbuf);
 601                         g_object_unref (pixbuf);
 602                         pixbuf = real_pixbuf;
 603                 }
 604         } else {
 605                 /* There is no provided thumbnail.  We need to make one. */
 606                 pixbuf = make_thumbnail_for_size (pdf_document, page, size, border);
 607         }
 608         return pixbuf;
 609 }
 610
 611 static void
 612 pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnails,
 613                                         gint                  page,
 614                                         gint                  size,
 615                                         gint                 *width,
 616                                         gint                 *height)
 617 {
 618         PdfDocument *pdf_document;
 619         PopplerPage *poppler_page;
 620         gint has_thumb;
 621
 622         pdf_document = PDF_DOCUMENT (document_thumbnails);
 623         poppler_page = poppler_document_get_page (pdf_document->document, page);
 624
 625         g_return_if_fail (width != NULL);
 626         g_return_if_fail (height != NULL);
 627         g_return_if_fail (poppler_page != NULL);
 628
 629         has_thumb = poppler_page_get_thumbnail_size (poppler_page, width, height);
 630
 631         if (!has_thumb) {
 632                 double page_width, page_height;
 633
 634                 poppler_page_get_size (poppler_page, &page_width, &page_height);
 635                 if (page_width > page_height) {
 636                         *width = size;
 637                         *height = (int) (size * page_height / page_width);
 638                 } else {
 639                         *width = (int) (size * page_width / page_height);
 640                         *height = size;
 641                 }
 642         }
 643 }
 644
 645 static void
 646 pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 647 {
 648         iface->get_thumbnail = pdf_document_thumbnails_get_thumbnail;
 649         iface->get_dimensions = pdf_document_thumbnails_get_dimensions;
 650 }
 651
 652
 653 static gboolean
 654 pdf_document_search_idle_callback (void *data)
 655 {
 656         PdfDocumentSearch *search = (PdfDocumentSearch*) data;
 657         PdfDocument *pdf_document = search->document;
 658         int n_pages, changed_page;
 659         GList *matches;
 660         PopplerPage *page;
 661
 662         page = poppler_document_get_page (search->document->document,
 663                                           search->search_page);
 664
 665         g_mutex_lock (EV_DOC_MUTEX);
 666         matches = poppler_page_find_text (page, search->text);
 667         g_mutex_unlock (EV_DOC_MUTEX);
 668
 669         search->pages[search->search_page] = matches;
 670         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (search->document));
 671
 672         changed_page = search->search_page;
 673         search->search_page += 1;
 674         if (search->search_page == n_pages) {
 675                 /* wrap around */
 676                 search->search_page = 0;
 677         }
 678
 679         if (search->search_page != search->start_page) {
 680                 ev_document_find_changed (EV_DOCUMENT_FIND (pdf_document),
 681                                           changed_page);
 682                 return TRUE;
 683         }
 684
 685         /* We're done. */
 686         search->idle = 0; /* will return FALSE to remove */
 687         return FALSE;
 688 }
 689
 690
 691 static PdfDocumentSearch *
 692 pdf_document_search_new (PdfDocument *pdf_document,
 693                          int          start_page,
 694                          const char  *text)
 695 {
 696         PdfDocumentSearch *search;
 697         int n_pages;
 698         int i;
 699
 700         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (pdf_document));
 701
 702         search = g_new0 (PdfDocumentSearch, 1);
 703
 704         search->text = g_strdup (text);
 705         search->pages = g_new0 (GList *, n_pages);
 706         for (i = 0; i < n_pages; i++) {
 707                 search->pages[i] = NULL;
 708         }
 709
 710         search->document = pdf_document;
 711
 712         /* We add at low priority so the progress bar repaints */
 713         search->idle = g_idle_add_full (G_PRIORITY_LOW,
 714                                         pdf_document_search_idle_callback,
 715                                         search,
 716                                         NULL);
 717
 718         search->start_page = start_page;
 719         search->search_page = start_page;
 720
 721         return search;
 722 }
 723
 724 static void
 725 pdf_document_search_free (PdfDocumentSearch   *search)
 726 {
 727         PdfDocument *pdf_document = search->document;
 728         int n_pages;
 729         int i;
 730
 731         if (search->idle != 0)
 732                 g_source_remove (search->idle);
 733
 734         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (pdf_document));
 735         for (i = 0; i < n_pages; i++) {
 736                 g_list_foreach (search->pages[i], (GFunc) g_free, NULL);
 737                 g_list_free (search->pages[i]);
 738         }
 739
 740         g_free (search->text);
 741 }
 742
 743 static void
 744 pdf_document_find_begin (EvDocumentFind   *document,
 745                          int               page,
 746                          const char       *search_string,
 747                          gboolean          case_sensitive)
 748 {
 749         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 750
 751         /* FIXME handle case_sensitive (right now XPDF
 752          * code is always case insensitive for ASCII
 753          * and case sensitive for all other languaages)
 754          */
 755
 756         if (pdf_document->search &&
 757             strcmp (search_string, pdf_document->search->text) == 0)
 758                 return;
 759
 760         if (pdf_document->search)
 761                 pdf_document_search_free (pdf_document->search);
 762
 763         pdf_document->search = pdf_document_search_new (pdf_document,
 764                                                         page,
 765                                                         search_string);
 766 }
 767
 768 int
 769 pdf_document_find_get_n_results (EvDocumentFind *document_find, int page)
 770 {
 771         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 772         int current_page;
 773
 774         if (search) {
 775                 return g_list_length (search->pages[page]);
 776         } else {
 777                 return 0;
 778         }
 779 }
 780
 781 gboolean
 782 pdf_document_find_get_result (EvDocumentFind *document_find,
 783                               int             page,
 784                               int             n_result,
 785                               EvRectangle    *rectangle)
 786 {
 787         PdfDocument *pdf_document = PDF_DOCUMENT (document_find);
 788         PdfDocumentSearch *search = pdf_document->search;
 789         PopplerPage *poppler_page;
 790         PopplerRectangle *r;
 791         int current_page;
 792         double height;
 793
 794         if (search == NULL)
 795                 return FALSE;
 796
 797         r = (PopplerRectangle *) g_list_nth_data (search->pages[page],
 798                                                   n_result);
 799         if (r == NULL)
 800                 return FALSE;
 801
 802         poppler_page = poppler_document_get_page (pdf_document->document, page);
 803         poppler_page_get_size (poppler_page, NULL, &height);
 804         rectangle->x1 = r->x1;
 805         rectangle->y1 = height - r->y2;
 806         rectangle->x2 = r->x2;
 807         rectangle->y2 = height - r->y1;
 808
 809         return TRUE;
 810 }
 811
 812 int
 813 pdf_document_find_page_has_results (EvDocumentFind *document_find,
 814                                     int             page)
 815 {
 816         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 817
 818         g_return_val_if_fail (search != NULL, FALSE);
 819
 820         return search->pages[page] != NULL;
 821 }
 822
 823 double
 824 pdf_document_find_get_progress (EvDocumentFind *document_find)
 825 {
 826         PdfDocumentSearch *search;
 827         int n_pages, pages_done;
 828
 829         search = PDF_DOCUMENT (document_find)->search;
 830
 831         if (search == NULL) {
 832                 return 0;
 833         }
 834
 835         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (document_find));
 836         if (search->search_page > search->start_page) {
 837                 pages_done = search->search_page - search->start_page + 1;
 838         } else if (search->search_page == search->start_page) {
 839                 pages_done = n_pages;
 840         } else {
 841                 pages_done = n_pages - search->start_page + search->search_page;
 842         }
 843
 844         return pages_done / (double) n_pages;
 845 }
 846
 847 static void
 848 pdf_document_find_cancel (EvDocumentFind *document)
 849 {
 850         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 851
 852         if (pdf_document->search) {
 853                 pdf_document_search_free (pdf_document->search);
 854                 pdf_document->search = NULL;
 855         }
 856 }
 857
 858 static void
 859 pdf_document_find_iface_init (EvDocumentFindIface *iface)
 860 {
 861         iface->begin = pdf_document_find_begin;
 862         iface->get_n_results = pdf_document_find_get_n_results;
 863         iface->get_result = pdf_document_find_get_result;
 864         iface->page_has_results = pdf_document_find_page_has_results;
 865         iface->get_progress = pdf_document_find_get_progress;
 866         iface->cancel = pdf_document_find_cancel;
 867 }
 868
 869 static void
 870 pdf_document_ps_exporter_begin (EvPSExporter *exporter, const char *filename)
 871 {
 872         PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
 873         int n_pages;
 874
 875         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (exporter));
 876         pdf_document->ps_file = poppler_ps_file_new (pdf_document->document,
 877                                                      filename, n_pages);
 878 }
 879
 880 static void
 881 pdf_document_ps_exporter_do_page (EvPSExporter *exporter, int page)
 882 {
 883         PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
 884         PopplerPage *poppler_page;
 885
 886         g_return_if_fail (pdf_document->ps_file != NULL);
 887
 888         poppler_page = poppler_document_get_page (pdf_document->document, page);
 889         poppler_page_render_to_ps (poppler_page, pdf_document->ps_file);
 890 }
 891
 892 static void
 893 pdf_document_ps_exporter_end (EvPSExporter *exporter)
 894 {
 895         PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
 896
 897         poppler_ps_file_free (pdf_document->ps_file);
 898         pdf_document->ps_file = NULL;
 899 }
 900
 901 static void
 902 pdf_document_ps_exporter_iface_init (EvPSExporterIface *iface)
 903 {
 904         iface->begin = pdf_document_ps_exporter_begin;
 905         iface->do_page = pdf_document_ps_exporter_do_page;
 906         iface->end = pdf_document_ps_exporter_end;
 907 }
 908
 909 PdfDocument *
 910 pdf_document_new (void)
 911 {
 912         return PDF_DOCUMENT (g_object_new (PDF_TYPE_DOCUMENT, NULL));
 913 }