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 (G_OBJECT (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) ((width_points * scale) + 0.5);
 258         height = (int) ((height_points * scale) + 0.5);
 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                 default:
 352                         break;
 353         }
 354
 355         switch (mode) {
 356                 case POPPLER_PAGE_MODE_NONE:
 357                         info->mode = EV_DOCUMENT_MODE_NONE;
 358                         break;
 359                 case POPPLER_PAGE_MODE_USE_THUMBS:
 360                         info->mode = EV_DOCUMENT_MODE_USE_THUMBS;
 361                         break;
 362                 case POPPLER_PAGE_MODE_USE_OC:
 363                         info->mode = EV_DOCUMENT_MODE_USE_OC;
 364                         break;
 365                 case POPPLER_PAGE_MODE_FULL_SCREEN:
 366                         info->mode = EV_DOCUMENT_MODE_FULL_SCREEN;
 367                         break;
 368                 case POPPLER_PAGE_MODE_USE_ATTACHMENTS:
 369                         info->mode = EV_DOCUMENT_MODE_USE_ATTACHMENTS;
 370                 default:
 371                         break;
 372         }
 373
 374         info->ui_hints = 0;
 375         if (view_prefs & POPPLER_VIEWER_PREFERENCES_HIDE_TOOLBAR) {
 376                 info->ui_hints |= EV_DOCUMENT_UI_HINT_HIDE_TOOLBAR;
 377         }
 378         if (view_prefs & POPPLER_VIEWER_PREFERENCES_HIDE_MENUBAR) {
 379                 info->ui_hints |= EV_DOCUMENT_UI_HINT_HIDE_MENUBAR;
 380         }
 381         if (view_prefs & POPPLER_VIEWER_PREFERENCES_HIDE_WINDOWUI) {
 382                 info->ui_hints |= EV_DOCUMENT_UI_HINT_HIDE_WINDOWUI;
 383         }
 384         if (view_prefs & POPPLER_VIEWER_PREFERENCES_FIT_WINDOW) {
 385                 info->ui_hints |= EV_DOCUMENT_UI_HINT_FIT_WINDOW;
 386         }
 387         if (view_prefs & POPPLER_VIEWER_PREFERENCES_CENTER_WINDOW) {
 388                 info->ui_hints |= EV_DOCUMENT_UI_HINT_CENTER_WINDOW;
 389         }
 390         if (view_prefs & POPPLER_VIEWER_PREFERENCES_DISPLAY_DOC_TITLE) {
 391                 info->ui_hints |= EV_DOCUMENT_UI_HINT_DISPLAY_DOC_TITLE;
 392         }
 393         if (view_prefs & POPPLER_VIEWER_PREFERENCES_DIRECTION_RTL) {
 394                 info->ui_hints |=  EV_DOCUMENT_UI_HINT_DIRECTION_RTL;
 395         }
 396
 397         return info;
 398 }
 399
 400 static char *
 401 pdf_document_get_text (EvDocument *document, int page, EvRectangle *rect)
 402 {
 403         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 404         PopplerPage *poppler_page;
 405         PopplerRectangle r;
 406         double height;
 407
 408         poppler_page = poppler_document_get_page (pdf_document->document, page);
 409         g_return_val_if_fail (poppler_page != NULL, NULL);
 410
 411         poppler_page_get_size (poppler_page, NULL, &height);
 412         r.x1 = rect->x1;
 413         r.y1 = height - rect->y2;
 414         r.x2 = rect->x2;
 415         r.y2 = height - rect->y1;
 416
 417         return poppler_page_get_text (poppler_page, &r);
 418 }
 419
 420 static void
 421 pdf_document_document_iface_init (EvDocumentIface *iface)
 422 {
 423         iface->save = pdf_document_save;
 424         iface->load = pdf_document_load;
 425         iface->get_n_pages = pdf_document_get_n_pages;
 426         iface->get_page_size = pdf_document_get_page_size;
 427         iface->get_page_label = pdf_document_get_page_label;
 428         iface->get_links = pdf_document_get_links;
 429         iface->render_pixbuf = pdf_document_render_pixbuf;
 430         iface->get_text = pdf_document_get_text;
 431         iface->can_get_text = pdf_document_can_get_text;
 432         iface->get_info = pdf_document_get_info;
 433 };
 434
 435 static void
 436 pdf_document_security_iface_init (EvDocumentSecurityIface *iface)
 437 {
 438         iface->has_document_security = pdf_document_has_document_security;
 439         iface->set_password = pdf_document_set_password;
 440 }
 441
 442 static gboolean
 443 pdf_document_links_has_document_links (EvDocumentLinks *document_links)
 444 {
 445         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 446         PopplerIndexIter *iter;
 447
 448         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 449
 450         iter = poppler_index_iter_new (pdf_document->document);
 451         if (iter == NULL)
 452                 return FALSE;
 453         poppler_index_iter_free (iter);
 454
 455         return TRUE;
 456 }
 457
 458 static EvLink *
 459 ev_link_from_action (PopplerAction *action)
 460 {
 461         EvLink *link;
 462         const char *title;
 463
 464         title = action->any.title;
 465
 466         if (action->type == POPPLER_ACTION_GOTO_DEST) {
 467                 link = ev_link_new_page (title, action->goto_dest.dest->page_num - 1);
 468         } else if (action->type == POPPLER_ACTION_URI) {
 469                 link = ev_link_new_external (title, action->uri.uri);
 470         } else {
 471                 link = ev_link_new_title (title);
 472         }
 473
 474         return link;
 475 }
 476
 477
 478 static void
 479 build_tree (PdfDocument      *pdf_document,
 480             GtkTreeModel     *model,
 481             GtkTreeIter      *parent,
 482             PopplerIndexIter *iter)
 483 {
 484
 485         do {
 486                 GtkTreeIter tree_iter;
 487                 PopplerIndexIter *child;
 488                 PopplerAction *action;
 489                 EvLink *link;
 490
 491                 action = poppler_index_iter_get_action (iter);
 492                 if (action) {
 493                         gtk_tree_store_append (GTK_TREE_STORE (model), &tree_iter, parent);
 494                         link = ev_link_from_action (action);
 495                         poppler_action_free (action);
 496
 497                         gtk_tree_store_set (GTK_TREE_STORE (model), &tree_iter,
 498                                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, ev_link_get_title (link),
 499                                             EV_DOCUMENT_LINKS_COLUMN_LINK, link,
 500                                             -1);
 501                         child = poppler_index_iter_get_child (iter);
 502                         if (child)
 503                                 build_tree (pdf_document, model, &tree_iter, child);
 504                         poppler_index_iter_free (child);
 505                 }
 506         } while (poppler_index_iter_next (iter));
 507 }
 508
 509
 510 static GtkTreeModel *
 511 pdf_document_links_get_links_model (EvDocumentLinks *document_links)
 512 {
 513         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 514         GtkTreeModel *model = NULL;
 515         PopplerIndexIter *iter;
 516
 517         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), NULL);
 518
 519         iter = poppler_index_iter_new (pdf_document->document);
 520         /* Create the model iff we have items*/
 521         if (iter != NULL) {
 522                 model = (GtkTreeModel *) gtk_tree_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 523                                                              G_TYPE_STRING,
 524                                                              G_TYPE_POINTER);
 525                 build_tree (pdf_document, model, NULL, iter);
 526                 poppler_index_iter_free (iter);
 527         }
 528
 529
 530         return model;
 531 }
 532
 533
 534 static void
 535 pdf_document_document_links_iface_init (EvDocumentLinksIface *iface)
 536 {
 537         iface->has_document_links = pdf_document_links_has_document_links;
 538         iface->get_links_model = pdf_document_links_get_links_model;
 539 }
 540
 541
 542 static GdkPixbuf *
 543 make_thumbnail_for_size (PdfDocument *pdf_document,
 544                          gint         page,
 545                          gint         size,
 546                          gboolean     border)
 547 {
 548         PopplerPage *poppler_page;
 549         GdkPixbuf *pixbuf;
 550         int width, height;
 551         int x_offset, y_offset;
 552         double scale;
 553         gdouble unscaled_width, unscaled_height;
 554
 555         poppler_page = poppler_document_get_page (pdf_document->document, page);
 556
 557         g_return_val_if_fail (poppler_page != NULL, NULL);
 558
 559         pdf_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (pdf_document), page, size, &width, &height);
 560         poppler_page_get_size (poppler_page, &unscaled_width, &unscaled_height);
 561         scale = width / unscaled_width;
 562
 563         if (border) {
 564                 pixbuf = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 565                 x_offset = 1;
 566                 y_offset = 1;
 567         } else {
 568                 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 569                                          width, height);
 570                 gdk_pixbuf_fill (pixbuf, 0xffffffff);
 571                 x_offset = 0;
 572                 y_offset = 0;
 573         }
 574
 575         poppler_page_render_to_pixbuf (poppler_page, 0, 0,
 576                                        width, height,
 577                                        scale, pixbuf,
 578                                        x_offset, y_offset);
 579
 580         return pixbuf;
 581 }
 582
 583 static GdkPixbuf *
 584 pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
 585                                        gint                  page,
 586                                        gint                  size,
 587                                        gboolean              border)
 588 {
 589         PdfDocument *pdf_document;
 590         PopplerPage *poppler_page;
 591         GdkPixbuf *pixbuf;
 592
 593         pdf_document = PDF_DOCUMENT (document_thumbnails);
 594
 595         poppler_page = poppler_document_get_page (pdf_document->document, page);
 596         g_return_val_if_fail (poppler_page != NULL, NULL);
 597
 598         pixbuf = poppler_page_get_thumbnail (poppler_page);
 599         if (pixbuf != NULL) {
 600                 /* The document provides its own thumbnails. */
 601                 if (border) {
 602                         GdkPixbuf *real_pixbuf;
 603
 604                         real_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, pixbuf);
 605                         g_object_unref (pixbuf);
 606                         pixbuf = real_pixbuf;
 607                 }
 608         } else {
 609                 /* There is no provided thumbnail.  We need to make one. */
 610                 pixbuf = make_thumbnail_for_size (pdf_document, page, size, border);
 611         }
 612         return pixbuf;
 613 }
 614
 615 static void
 616 pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnails,
 617                                         gint                  page,
 618                                         gint                  size,
 619                                         gint                 *width,
 620                                         gint                 *height)
 621 {
 622         PdfDocument *pdf_document;
 623         PopplerPage *poppler_page;
 624         gint has_thumb;
 625
 626         pdf_document = PDF_DOCUMENT (document_thumbnails);
 627         poppler_page = poppler_document_get_page (pdf_document->document, page);
 628
 629         g_return_if_fail (width != NULL);
 630         g_return_if_fail (height != NULL);
 631         g_return_if_fail (poppler_page != NULL);
 632
 633         has_thumb = poppler_page_get_thumbnail_size (poppler_page, width, height);
 634
 635         if (!has_thumb) {
 636                 double page_width, page_height;
 637
 638                 poppler_page_get_size (poppler_page, &page_width, &page_height);
 639                 if (page_width > page_height) {
 640                         *width = size;
 641                         *height = (int) (size * page_height / page_width);
 642                 } else {
 643                         *width = (int) (size * page_width / page_height);
 644                         *height = size;
 645                 }
 646         }
 647 }
 648
 649 static void
 650 pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
 651 {
 652         iface->get_thumbnail = pdf_document_thumbnails_get_thumbnail;
 653         iface->get_dimensions = pdf_document_thumbnails_get_dimensions;
 654 }
 655
 656
 657 static gboolean
 658 pdf_document_search_idle_callback (void *data)
 659 {
 660         PdfDocumentSearch *search = (PdfDocumentSearch*) data;
 661         PdfDocument *pdf_document = search->document;
 662         int n_pages;
 663         GList *matches;
 664         PopplerPage *page;
 665
 666         page = poppler_document_get_page (search->document->document,
 667                                           search->search_page);
 668
 669         ev_document_doc_mutex_lock ();
 670         matches = poppler_page_find_text (page, search->text);
 671         ev_document_doc_mutex_unlock ();
 672
 673         search->pages[search->search_page] = matches;
 674         ev_document_find_changed (EV_DOCUMENT_FIND (pdf_document),
 675                                   search->search_page);
 676
 677         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (search->document));
 678         search->search_page += 1;
 679         if (search->search_page == n_pages) {
 680                 /* wrap around */
 681                 search->search_page = 0;
 682         }
 683
 684         if (search->search_page != search->start_page) {
 685                 return TRUE;
 686         }
 687
 688         /* We're done. */
 689         search->idle = 0; /* will return FALSE to remove */
 690         return FALSE;
 691 }
 692
 693
 694 static PdfDocumentSearch *
 695 pdf_document_search_new (PdfDocument *pdf_document,
 696                          int          start_page,
 697                          const char  *text)
 698 {
 699         PdfDocumentSearch *search;
 700         int n_pages;
 701         int i;
 702
 703         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (pdf_document));
 704
 705         search = g_new0 (PdfDocumentSearch, 1);
 706
 707         search->text = g_strdup (text);
 708         search->pages = g_new0 (GList *, n_pages);
 709         for (i = 0; i < n_pages; i++) {
 710                 search->pages[i] = NULL;
 711         }
 712
 713         search->document = pdf_document;
 714
 715         /* We add at low priority so the progress bar repaints */
 716         search->idle = g_idle_add_full (G_PRIORITY_LOW,
 717                                         pdf_document_search_idle_callback,
 718                                         search,
 719                                         NULL);
 720
 721         search->start_page = start_page;
 722         search->search_page = start_page;
 723
 724         return search;
 725 }
 726
 727 static void
 728 pdf_document_search_free (PdfDocumentSearch   *search)
 729 {
 730         PdfDocument *pdf_document = search->document;
 731         int n_pages;
 732         int i;
 733
 734         if (search->idle != 0)
 735                 g_source_remove (search->idle);
 736
 737         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (pdf_document));
 738         for (i = 0; i < n_pages; i++) {
 739                 g_list_foreach (search->pages[i], (GFunc) g_free, NULL);
 740                 g_list_free (search->pages[i]);
 741         }
 742
 743         g_free (search->text);
 744 }
 745
 746 static void
 747 pdf_document_find_begin (EvDocumentFind   *document,
 748                          int               page,
 749                          const char       *search_string,
 750                          gboolean          case_sensitive)
 751 {
 752         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 753
 754         /* FIXME handle case_sensitive (right now XPDF
 755          * code is always case insensitive for ASCII
 756          * and case sensitive for all other languaages)
 757          */
 758
 759         if (pdf_document->search &&
 760             strcmp (search_string, pdf_document->search->text) == 0)
 761                 return;
 762
 763         if (pdf_document->search)
 764                 pdf_document_search_free (pdf_document->search);
 765
 766         pdf_document->search = pdf_document_search_new (pdf_document,
 767                                                         page,
 768                                                         search_string);
 769 }
 770
 771 int
 772 pdf_document_find_get_n_results (EvDocumentFind *document_find, int page)
 773 {
 774         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 775
 776         if (search) {
 777                 return g_list_length (search->pages[page]);
 778         } else {
 779                 return 0;
 780         }
 781 }
 782
 783 gboolean
 784 pdf_document_find_get_result (EvDocumentFind *document_find,
 785                               int             page,
 786                               int             n_result,
 787                               EvRectangle    *rectangle)
 788 {
 789         PdfDocument *pdf_document = PDF_DOCUMENT (document_find);
 790         PdfDocumentSearch *search = pdf_document->search;
 791         PopplerPage *poppler_page;
 792         PopplerRectangle *r;
 793         double height;
 794
 795         if (search == NULL)
 796                 return FALSE;
 797
 798         r = (PopplerRectangle *) g_list_nth_data (search->pages[page],
 799                                                   n_result);
 800         if (r == NULL)
 801                 return FALSE;
 802
 803         poppler_page = poppler_document_get_page (pdf_document->document, page);
 804         poppler_page_get_size (poppler_page, NULL, &height);
 805         rectangle->x1 = r->x1;
 806         rectangle->y1 = height - r->y2;
 807         rectangle->x2 = r->x2;
 808         rectangle->y2 = height - r->y1;
 809
 810         return TRUE;
 811 }
 812
 813 int
 814 pdf_document_find_page_has_results (EvDocumentFind *document_find,
 815                                     int             page)
 816 {
 817         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 818
 819         g_return_val_if_fail (search != NULL, FALSE);
 820
 821         return search->pages[page] != NULL;
 822 }
 823
 824 double
 825 pdf_document_find_get_progress (EvDocumentFind *document_find)
 826 {
 827         PdfDocumentSearch *search;
 828         int n_pages, pages_done;
 829
 830         search = PDF_DOCUMENT (document_find)->search;
 831
 832         if (search == NULL) {
 833                 return 0;
 834         }
 835
 836         n_pages = pdf_document_get_n_pages (EV_DOCUMENT (document_find));
 837         if (search->search_page > search->start_page) {
 838                 pages_done = search->search_page - search->start_page + 1;
 839         } else if (search->search_page == search->start_page) {
 840                 pages_done = n_pages;
 841         } else {
 842                 pages_done = n_pages - search->start_page + search->search_page;
 843         }
 844
 845         return pages_done / (double) n_pages;
 846 }
 847
 848 static void
 849 pdf_document_find_cancel (EvDocumentFind *document)
 850 {
 851         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 852
 853         if (pdf_document->search) {
 854                 pdf_document_search_free (pdf_document->search);
 855                 pdf_document->search = NULL;
 856         }
 857 }
 858
 859 static void
 860 pdf_document_find_iface_init (EvDocumentFindIface *iface)
 861 {
 862         iface->begin = pdf_document_find_begin;
 863         iface->get_n_results = pdf_document_find_get_n_results;
 864         iface->get_result = pdf_document_find_get_result;
 865         iface->page_has_results = pdf_document_find_page_has_results;
 866         iface->get_progress = pdf_document_find_get_progress;
 867         iface->cancel = pdf_document_find_cancel;
 868 }
 869
 870 static void
 871 pdf_document_ps_exporter_begin (EvPSExporter *exporter, const char *filename,
 872                                 int first_page, int last_page)
 873 {
 874         PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
 875
 876         pdf_document->ps_file = poppler_ps_file_new (pdf_document->document, filename,
 877                                                      first_page,
 878                                                      last_page - first_page + 1);
 879 }
 880
 881 static void
 882 pdf_document_ps_exporter_do_page (EvPSExporter *exporter, int page)
 883 {
 884         PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
 885         PopplerPage *poppler_page;
 886
 887         g_return_if_fail (pdf_document->ps_file != NULL);
 888
 889         poppler_page = poppler_document_get_page (pdf_document->document, page);
 890         poppler_page_render_to_ps (poppler_page, pdf_document->ps_file);
 891 }
 892
 893 static void
 894 pdf_document_ps_exporter_end (EvPSExporter *exporter)
 895 {
 896         PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
 897
 898         poppler_ps_file_free (pdf_document->ps_file);
 899         pdf_document->ps_file = NULL;
 900 }
 901
 902 static void
 903 pdf_document_ps_exporter_iface_init (EvPSExporterIface *iface)
 904 {
 905         iface->begin = pdf_document_ps_exporter_begin;
 906         iface->do_page = pdf_document_ps_exporter_do_page;
 907         iface->end = pdf_document_ps_exporter_end;
 908 }
 909
 910 PdfDocument *
 911 pdf_document_new (void)
 912 {
 913         return PDF_DOCUMENT (g_object_new (PDF_TYPE_DOCUMENT, NULL));
 914 }