pdf/xpdf/pdf-document.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 <glib/gi18n.h>
  21
  22 #include "gpdf-g-switch.h"
  23 #include "pdf-document.h"
  24 #include "ev-ps-exporter.h"
  25 #include "ev-document-find.h"
  26 #include "gpdf-g-switch.h"
  27 #include "ev-document-bookmarks.h"
  28 #include "ev-document-misc.h"
  29 #include "ev-document-thumbnails.h"
  30
  31 #include "GlobalParams.h"
  32 #include "GDKSplashOutputDev.h"
  33 #include "PDFDoc.h"
  34 #include "Outline.h"
  35 #include "UnicodeMap.h"
  36 #include "GlobalParams.h"
  37 #include "GfxState.h"
  38 #include "Thumb.h"
  39 #include "goo/GList.h"
  40 #include "PSOutputDev.h"
  41
  42 enum {
  43         PROP_0,
  44         PROP_TITLE
  45 };
  46
  47 typedef struct
  48 {
  49         PdfDocument *document;
  50         gunichar *ucs4;
  51         glong ucs4_len;
  52         guint idle;
  53         /* full results are only possible for the rendered current page */
  54         int current_page;
  55         GArray *current_page_results;
  56         guchar *other_page_flags; /* length n_pages + 1, first element ignored */
  57         int start_page;   /* skip this one as we iterate, since we did it first */
  58         int search_page;  /* the page we're searching now */
  59         TextOutputDev *output_dev;
  60 } PdfDocumentSearch;
  61
  62 typedef struct _PdfDocumentClass PdfDocumentClass;
  63
  64 #define PDF_DOCUMENT_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), PDF_TYPE_DOCUMENT, PdfDocumentClass))
  65 #define PDF_IS_DOCUMENT_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), PDF_TYPE_DOCUMENT))
  66 #define PDF_DOCUMENT_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), PDF_TYPE_DOCUMENT, PdfDocumentClass))
  67
  68 struct _PdfDocumentClass
  69 {
  70         GObjectClass parent_class;
  71 };
  72
  73 struct _PdfDocument
  74 {
  75         GObject parent_instance;
  76
  77         int page;
  78         int page_x_offset;
  79         int page_y_offset;
  80         double scale;
  81         GdkDrawable *target;
  82
  83         GDKSplashOutputDev *out;
  84         PSOutputDev *ps_out;
  85         PDFDoc *doc;
  86         UnicodeMap *umap;
  87
  88         gboolean page_valid;
  89
  90         PdfDocumentSearch *search;
  91 };
  92
  93 static void pdf_document_document_bookmarks_iface_init  (EvDocumentBookmarksIface  *iface);
  94 static void pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  95 static void pdf_document_document_iface_init            (EvDocumentIface           *iface);
  96 static void pdf_document_ps_exporter_iface_init (EvPSExporterIface   *iface);
  97 static void pdf_document_find_iface_init        (EvDocumentFindIface *iface);
  98 static void pdf_document_search_free            (PdfDocumentSearch   *search);
  99 static void pdf_document_search_page_changed    (PdfDocumentSearch   *search);
 100
 101 G_DEFINE_TYPE_WITH_CODE (PdfDocument, pdf_document, G_TYPE_OBJECT,
 102                          {
 103                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
 104                                                         pdf_document_document_iface_init);
 105                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_BOOKMARKS,
 106                                                         pdf_document_document_bookmarks_iface_init);
 107                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
 108                                                         pdf_document_document_thumbnails_iface_init);
 109                                  G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
 110                                                         pdf_document_ps_exporter_iface_init);
 111                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND,
 112                                                         pdf_document_find_iface_init);
 113                          });
 114
 115 static gboolean
 116 document_validate_page (PdfDocument *pdf_document)
 117 {
 118         if (!pdf_document->page_valid) {
 119                 pdf_document->doc->displayPage (pdf_document->out, pdf_document->page,
 120                                                 72 * pdf_document->scale,
 121                                                 72 * pdf_document->scale,
 122                                                 0, gTrue, gTrue);
 123
 124                 pdf_document->page_valid = TRUE;
 125
 126                 /* Update the search results available to the app since
 127                  * we only provide full results on the current page
 128                  */
 129                 if (pdf_document->search)
 130                         pdf_document_search_page_changed (pdf_document->search);
 131         }
 132
 133         return pdf_document->page_valid;
 134 }
 135
 136 static gboolean
 137 pdf_document_load (EvDocument  *document,
 138                    const char  *uri,
 139                    GError     **error)
 140 {
 141         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 142         PDFDoc *newDoc;
 143         int err;
 144         char *filename;
 145         GString *filename_g;
 146         GString *enc;
 147
 148         if (!globalParams) {
 149                 globalParams = new GlobalParams("/etc/xpdfrc");
 150                 globalParams->setupBaseFontsFc(NULL);
 151         }
 152
 153         if (! pdf_document->umap) {
 154                 enc = new GString("UTF-8");
 155                 pdf_document->umap = globalParams->getUnicodeMap(enc);
 156                 pdf_document->umap->incRefCnt ();
 157                 delete enc;
 158         }
 159
 160         filename = g_filename_from_uri (uri, NULL, error);
 161         if (!filename)
 162                 return FALSE;
 163
 164         filename_g = new GString (filename);
 165         g_free (filename);
 166
 167         // open the PDF file, assumes ownership of filename_g
 168         newDoc = new PDFDoc(filename_g, 0, 0);
 169
 170         if (!newDoc->isOk()) {
 171                 err = newDoc->getErrorCode();
 172                 delete newDoc;
 173
 174                 /* FIXME: Add a real error enum to EvDocument */
 175                 g_set_error (error, G_FILE_ERROR,
 176                              G_FILE_ERROR_FAILED,
 177                              "Failed to load document (error %d) '%s'\n",
 178                              err,
 179                              uri);
 180
 181                 return FALSE;
 182         }
 183
 184         if (pdf_document->doc)
 185                 delete pdf_document->doc;
 186         pdf_document->doc = newDoc;
 187
 188         pdf_document->page = 1;
 189
 190         if (pdf_document->out)
 191                 pdf_document->out->startDoc(pdf_document->doc->getXRef());
 192
 193         pdf_document->page_valid = FALSE;
 194
 195         g_object_notify (G_OBJECT (pdf_document), "title");
 196
 197         return TRUE;
 198 }
 199
 200 static int
 201 pdf_document_get_n_pages (EvDocument  *document)
 202 {
 203         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 204
 205         if (pdf_document->doc)
 206                 return pdf_document->doc->getNumPages();
 207         else
 208                 return 1;
 209 }
 210
 211 static void
 212 pdf_document_set_page (EvDocument  *document,
 213                        int          page)
 214 {
 215         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 216
 217         page = CLAMP (page, 1, ev_document_get_n_pages (document));
 218
 219         if (page != pdf_document->page) {
 220                 pdf_document->page = page;
 221                 pdf_document->page_valid = FALSE;
 222         }
 223
 224         ev_document_changed (document);
 225 }
 226
 227 static int
 228 pdf_document_get_page (EvDocument  *document)
 229 {
 230         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 231
 232         return pdf_document->page;
 233 }
 234
 235 static void
 236 redraw_callback (void *data)
 237 {
 238         /* Need to hook up through a EvDocument callback? */
 239 }
 240
 241 static void
 242 pdf_document_set_target (EvDocument  *document,
 243                          GdkDrawable *target)
 244 {
 245         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 246
 247         if (pdf_document->target != target) {
 248                 if (pdf_document->target)
 249                         g_object_unref (pdf_document->target);
 250
 251                 pdf_document->target = target;
 252
 253                 if (pdf_document->target)
 254                         g_object_ref (pdf_document->target);
 255
 256                 if (pdf_document->out) {
 257                         delete pdf_document->out;
 258                         pdf_document->out = NULL;
 259                 }
 260
 261                 if (pdf_document->target) {
 262                         pdf_document->out = new GDKSplashOutputDev (gdk_drawable_get_screen (pdf_document->target),
 263                                                          redraw_callback, (void*) document);
 264
 265                         if (pdf_document->doc)
 266                                 pdf_document->out->startDoc(pdf_document->doc->getXRef());
 267
 268                 }
 269
 270                 pdf_document->page_valid = FALSE;
 271         }
 272 }
 273
 274 static void
 275 pdf_document_set_scale (EvDocument  *document,
 276                         double       scale)
 277 {
 278         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 279
 280         if (pdf_document->scale != scale) {
 281                 pdf_document->scale = scale;
 282                 pdf_document->page_valid = FALSE;
 283         }
 284 }
 285
 286 static void
 287 pdf_document_set_page_offset (EvDocument  *document,
 288                               int          x,
 289                               int          y)
 290 {
 291         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 292
 293         pdf_document->page_x_offset = x;
 294         pdf_document->page_y_offset = y;
 295 }
 296
 297 static void
 298 pdf_document_get_page_size (EvDocument   *document,
 299                             int          *width,
 300                             int          *height)
 301 {
 302         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 303
 304         if (document_validate_page (pdf_document)) {
 305                 if (width)
 306                         *width = pdf_document->out->getBitmapWidth();
 307                 if (height)
 308                         *height = pdf_document->out->getBitmapHeight();
 309         } else {
 310                 if (width)
 311                         *width = 1;
 312                 if (height)
 313                         *height = 1;
 314         }
 315 }
 316
 317 static void
 318 pdf_document_render (EvDocument  *document,
 319                      int          clip_x,
 320                      int          clip_y,
 321                      int          clip_width,
 322                      int          clip_height)
 323 {
 324         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 325         GdkRectangle page;
 326         GdkRectangle draw;
 327
 328         if (!document_validate_page (pdf_document) || !pdf_document->target)
 329                 return;
 330
 331         page.x = pdf_document->page_x_offset;
 332         page.y = pdf_document->page_y_offset;
 333         page.width = pdf_document->out->getBitmapWidth();
 334         page.height = pdf_document->out->getBitmapHeight();
 335
 336         draw.x = clip_x;
 337         draw.y = clip_y;
 338         draw.width = clip_width;
 339         draw.height = clip_height;
 340
 341         if (gdk_rectangle_intersect (&page, &draw, &draw))
 342                 pdf_document->out->redraw (draw.x - page.x, draw.y - page.y,
 343                                            pdf_document->target,
 344                                            draw.x, draw.y,
 345                                            draw.width, draw.height);
 346 }
 347
 348 static void
 349 pdf_document_search_emit_found (PdfDocumentSearch *search)
 350 {
 351         PdfDocument *pdf_document = search->document;
 352         int n_pages;
 353         int pages_done;
 354         GArray *tmp_results;
 355         int i;
 356
 357         n_pages = ev_document_get_n_pages (EV_DOCUMENT (search->document));
 358         if (search->search_page > search->start_page) {
 359                 pages_done = search->search_page - search->start_page;
 360         } else if (search->search_page == search->start_page) {
 361                 pages_done = n_pages;
 362         } else {
 363                 pages_done = n_pages - search->start_page + search->search_page;
 364         }
 365
 366         tmp_results = g_array_new (FALSE, FALSE, sizeof (EvFindResult));
 367         g_array_append_vals (tmp_results,
 368                              search->current_page_results->data,
 369                              search->current_page_results->len);
 370
 371         /* Now append a bogus element for each page that has a result in it,
 372          * that is not the current page
 373          */
 374         i = 1;
 375         while (i <= n_pages) {
 376                 if (i != pdf_document->page &&
 377                     search->other_page_flags[i]) {
 378                         EvFindResult result;
 379
 380                         result.page_num = i;
 381
 382                         /* Use bogus coordinates, again we can't get coordinates
 383                          * until this is the current page because TextOutputDev
 384                          * isn't good enough
 385                          */
 386                         result.highlight_area.x = -1;
 387                         result.highlight_area.y = -1;
 388                         result.highlight_area.width = 1;
 389                         result.highlight_area.height = 1;
 390
 391                         g_array_append_val (tmp_results, result);
 392                 }
 393
 394                 ++i;
 395         }
 396
 397         ev_document_find_found (EV_DOCUMENT_FIND (pdf_document),
 398                                 (EvFindResult*) tmp_results->data,
 399                                 tmp_results->len,
 400                                 pages_done / (double) n_pages);
 401
 402         g_array_free (tmp_results, TRUE);
 403 }
 404
 405 static void
 406 pdf_document_search_page_changed (PdfDocumentSearch   *search)
 407 {
 408         PdfDocument *pdf_document = search->document;
 409         int current_page;
 410         EvFindResult result;
 411         int xMin, yMin, xMax, yMax;
 412
 413         current_page = pdf_document->page;
 414
 415         if (!pdf_document->page_valid) {
 416                 /* we can't do anything until displayPage() */
 417                 search->current_page = -1;
 418                 return;
 419         }
 420
 421         if (search->current_page == current_page)
 422                 return;
 423
 424         /* We need to create current_page_results for the new current page */
 425         g_array_set_size (search->current_page_results, 0);
 426
 427         if (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 428                                          gTrue, gTrue, // startAtTop, stopAtBottom
 429                                          gFalse, gFalse, // startAtLast, stopAtLast
 430                                          &xMin, &yMin, &xMax, &yMax)) {
 431                 result.page_num = pdf_document->page;
 432
 433                 result.highlight_area.x = xMin;
 434                 result.highlight_area.y = yMin;
 435                 result.highlight_area.width = xMax - xMin;
 436                 result.highlight_area.height = yMax - yMin;
 437
 438                 g_array_append_val (search->current_page_results, result);
 439                 /* Now find further results */
 440
 441                 while (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 442                                                     gFalse, gTrue,
 443                                                     gTrue, gFalse,
 444                                                     &xMin, &yMin, &xMax, &yMax)) {
 445
 446                         result.page_num = pdf_document->page;
 447
 448                         result.highlight_area.x = xMin;
 449                         result.highlight_area.y = yMin;
 450                         result.highlight_area.width = xMax - xMin;
 451                         result.highlight_area.height = yMax - yMin;
 452
 453                         g_array_append_val (search->current_page_results, result);
 454                 }
 455         }
 456
 457         /* needed for the initial current page since we don't search
 458          * it in the idle
 459          */
 460         search->other_page_flags[current_page] =
 461                 search->current_page_results->len > 0;
 462
 463         pdf_document_search_emit_found (search);
 464 }
 465
 466 static gboolean
 467 pdf_document_search_idle_callback (void *data)
 468 {
 469         PdfDocumentSearch *search = (PdfDocumentSearch*) data;
 470         PdfDocument *pdf_document = search->document;
 471         int n_pages;
 472         double xMin, yMin, xMax, yMax;
 473
 474         /* Note that PDF page count is 1 through n_pages INCLUSIVE
 475          * like a real book. We are looking to add one result for each
 476          * page with a match, because the coordinates are meaningless
 477          * with TextOutputDev, so we just want to flag matching pages
 478          * and then when the user switches to the current page, we
 479          * will emit "found" again with the real results.
 480          */
 481         n_pages = ev_document_get_n_pages (EV_DOCUMENT (search->document));
 482
 483         if (search->search_page == search->start_page) {
 484                 goto end_search;
 485         }
 486
 487         if (search->output_dev == 0) {
 488                 /* First time through here... */
 489                 search->output_dev = new TextOutputDev (NULL, gTrue, gFalse, gFalse);
 490                 if (!search->output_dev->isOk()) {
 491                         goto end_search;
 492                 }
 493         }
 494
 495         pdf_document->doc->displayPage (search->output_dev,
 496                                         search->search_page,
 497                                         72, 72, 0, gTrue, gFalse);
 498
 499         if (search->output_dev->findText (search->ucs4,
 500                                           search->ucs4_len,
 501                                           gTrue, gTrue, // startAtTop, stopAtBottom
 502                                           gFalse, gFalse, // startAtLast, stopAtLast
 503                                           &xMin, &yMin, &xMax, &yMax)) {
 504                 /* This page has results */
 505                 search->other_page_flags[search->search_page] = TRUE;
 506         }
 507
 508         search->search_page += 1;
 509         if (search->search_page > n_pages) {
 510                 /* wrap around */
 511                 search->search_page = 1;
 512         }
 513
 514         /* We do this even if nothing was found, to update the percent complete */
 515         pdf_document_search_emit_found (search);
 516
 517         return TRUE;
 518
 519  end_search:
 520         /* We're done. */
 521         search->idle = 0; /* will return FALSE to remove */
 522         return FALSE;
 523 }
 524
 525 static void
 526 pdf_document_find_begin (EvDocumentFind   *document,
 527                          const char       *search_string,
 528                          gboolean          case_sensitive)
 529 {
 530         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 531         PdfDocumentSearch *search;
 532         int n_pages;
 533         gunichar *ucs4;
 534         glong ucs4_len;
 535
 536         /* FIXME handle case_sensitive (right now XPDF
 537          * code is always case insensitive for ASCII
 538          * and case sensitive for all other languaages)
 539          */
 540
 541         g_assert (sizeof (gunichar) == sizeof (Unicode));
 542         ucs4 = g_utf8_to_ucs4_fast (search_string, -1,
 543                                     &ucs4_len);
 544
 545         if (pdf_document->search &&
 546             pdf_document->search->ucs4_len == ucs4_len &&
 547             memcmp (pdf_document->search->ucs4,
 548                     ucs4,
 549                     sizeof (gunichar) * ucs4_len) == 0) {
 550                 /* Search is unchanged */
 551                 g_free (ucs4);
 552                 return;
 553         }
 554
 555         if (pdf_document->search) {
 556                 pdf_document_search_free (pdf_document->search);
 557                 pdf_document->search = NULL;
 558         }
 559
 560         search = g_new0 (PdfDocumentSearch, 1);
 561
 562         search->ucs4 = ucs4;
 563         search->ucs4_len = ucs4_len;
 564
 565         search->current_page_results = g_array_new (FALSE,
 566                                                     FALSE,
 567                                                     sizeof (EvFindResult));
 568         n_pages = ev_document_get_n_pages (EV_DOCUMENT (document));
 569
 570         /* This is an array of bool; with the first value ignored
 571          * so we can index by the based-at-1 page numbers
 572          */
 573         search->other_page_flags = g_new0 (guchar, n_pages + 1);
 574
 575         search->document = pdf_document;
 576
 577         /* We add at low priority so the progress bar repaints */
 578         search->idle = g_idle_add_full (G_PRIORITY_LOW,
 579                                         pdf_document_search_idle_callback,
 580                                         search,
 581                                         NULL);
 582
 583         search->output_dev = 0;
 584
 585         search->start_page = pdf_document->page;
 586         search->search_page = search->start_page + 1;
 587         if (search->search_page > n_pages)
 588                 search->search_page = 1;
 589
 590         search->current_page = -1;
 591
 592         pdf_document->search = search;
 593
 594         /* Update for the current page right away */
 595         pdf_document_search_page_changed (search);
 596 }
 597
 598 static void
 599 pdf_document_find_cancel (EvDocumentFind   *document)
 600 {
 601         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 602
 603         if (pdf_document->search) {
 604                 pdf_document_search_free (pdf_document->search);
 605                 pdf_document->search = NULL;
 606         }
 607 }
 608
 609 static void
 610 pdf_document_search_free (PdfDocumentSearch   *search)
 611 {
 612         if (search->idle != 0)
 613                 g_source_remove (search->idle);
 614
 615         if (search->output_dev)
 616                 delete search->output_dev;
 617
 618         g_array_free (search->current_page_results, TRUE);
 619         g_free (search->other_page_flags);
 620
 621         g_free (search->ucs4);
 622         g_free (search);
 623 }
 624
 625 static void
 626 pdf_document_ps_export_begin (EvPSExporter *exporter, const char *filename)
 627 {
 628         PdfDocument *document = PDF_DOCUMENT (exporter);
 629
 630         if (document->ps_out)
 631                 delete document->ps_out;
 632
 633         document->ps_out = new PSOutputDev ((char *)filename, document->doc->getXRef(),
 634                                             document->doc->getCatalog(), 1,
 635                                             ev_document_get_n_pages (EV_DOCUMENT (document)),
 636                                             psModePS);
 637 }
 638
 639 static void
 640 pdf_document_ps_export_do_page (EvPSExporter *exporter, int page)
 641 {
 642         PdfDocument *document = PDF_DOCUMENT (exporter);
 643
 644         document->doc->displayPage (document->ps_out, page,
 645                                     72.0, 72.0, 0, gTrue, gFalse);
 646 }
 647
 648 static void
 649 pdf_document_ps_export_end (EvPSExporter *exporter)
 650 {
 651         PdfDocument *document = PDF_DOCUMENT (exporter);
 652
 653         delete document->ps_out;
 654         document->ps_out = NULL;
 655 }
 656
 657
 658 /* EvDocumentBookmarks Implementation */
 659 typedef struct
 660 {
 661         /* goo GList, not glib */
 662         GList *items;
 663         int index;
 664         int level;
 665 } BookmarksIter;
 666
 667 static gchar *
 668 unicode_to_char (OutlineItem *outline_item,
 669                  UnicodeMap *uMap)
 670 {
 671         GString gstr;
 672         gchar buf[8]; /* 8 is enough for mapping an unicode char to a string */
 673         int i, n;
 674
 675         for (i = 0; i < outline_item->getTitleLength(); ++i) {
 676                 n = uMap->mapUnicode(outline_item->getTitle()[i], buf, sizeof(buf));
 677                 gstr.append(buf, n);
 678         }
 679
 680         return g_strdup (gstr.getCString ());
 681 }
 682
 683
 684 static gboolean
 685 pdf_document_bookmarks_has_document_bookmarks (EvDocumentBookmarks *document_bookmarks)
 686 {
 687         PdfDocument *pdf_document = PDF_DOCUMENT (document_bookmarks);
 688         Outline *outline;
 689
 690         g_return_val_if_fail (PDF_IS_DOCUMENT (document_bookmarks), FALSE);
 691
 692         outline = pdf_document->doc->getOutline();
 693         if (outline->getItems() != NULL &&
 694             outline->getItems()->getLength() > 0)
 695                 return TRUE;
 696
 697         return FALSE;
 698 }
 699
 700 static EvDocumentBookmarksIter *
 701 pdf_document_bookmarks_begin_read (EvDocumentBookmarks *document_bookmarks)
 702 {
 703         PdfDocument *pdf_document = PDF_DOCUMENT (document_bookmarks);
 704         Outline *outline;
 705         BookmarksIter *iter;
 706         GList *items;
 707
 708         g_return_val_if_fail (PDF_IS_DOCUMENT (document_bookmarks), NULL);
 709
 710         outline = pdf_document->doc->getOutline();
 711         items = outline->getItems();
 712         if (! items)
 713                 return NULL;
 714
 715         iter = g_new0 (BookmarksIter, 1);
 716         iter->items = items;
 717         iter->index = 0;
 718         iter->level = 0;
 719
 720         return (EvDocumentBookmarksIter *) iter;
 721 }
 722
 723 static gboolean
 724 pdf_document_bookmarks_get_values (EvDocumentBookmarks      *document_bookmarks,
 725                                    EvDocumentBookmarksIter  *bookmarks_iter,
 726                                    char                    **title,
 727                                    EvDocumentBookmarksType  *type,
 728                                    gint                     *page)
 729 {
 730         PdfDocument *pdf_document = PDF_DOCUMENT (document_bookmarks);
 731         BookmarksIter *iter = (BookmarksIter *)bookmarks_iter;
 732         OutlineItem *anItem;
 733         LinkAction *link_action;
 734         LinkDest *link_dest = NULL;
 735         LinkURI *link_uri = NULL;
 736         LinkGoTo *link_goto = NULL;
 737         GString *named_dest;
 738         Unicode *link_title;
 739         Ref page_ref;
 740         gint page_num = -1;
 741
 742         g_return_val_if_fail (PDF_IS_DOCUMENT (document_bookmarks), FALSE);
 743         g_return_val_if_fail (iter != NULL, FALSE);
 744         g_return_val_if_fail (title != NULL, FALSE);
 745         g_return_val_if_fail (type != NULL, FALSE);
 746         g_return_val_if_fail (page != NULL, FALSE);
 747
 748         anItem = (OutlineItem *)iter->items->get(iter->index);
 749         link_action = anItem->getAction ();
 750         link_title = anItem->getTitle ();
 751
 752         if (link_action) {
 753                 switch (link_action->getKind ()) {
 754
 755                 case actionGoTo:
 756                         link_goto = dynamic_cast <LinkGoTo *> (link_action);
 757                         link_dest = link_goto->getDest ();
 758                         named_dest = link_goto->getNamedDest ();
 759
 760                         /* Wow!  This seems excessively slow on large
 761                          * documents. I need to investigate more... -jrb */
 762                         if (link_dest != NULL) {
 763                                 link_dest = link_dest->copy ();
 764                         } else if (named_dest != NULL) {
 765                                 named_dest = named_dest->copy ();
 766                                 link_dest = pdf_document->doc->findDest (named_dest);
 767                                 delete named_dest;
 768                         }
 769                         if (link_dest != NULL) {
 770                                 if (link_dest->isPageRef ()) {
 771                                         page_ref = link_dest->getPageRef ();
 772                                         page_num = pdf_document->doc->findPage (page_ref.num, page_ref.gen);
 773                                 } else {
 774                                         page_num = link_dest->getPageNum ();
 775                                 }
 776
 777                                 delete link_dest;
 778                         }
 779
 780                         break;
 781                 case actionURI:
 782                         link_uri = dynamic_cast <LinkURI *> (link_action);
 783                         break;
 784
 785                 case actionNamed:
 786                         /*Skip, for now */
 787                 default:
 788                         g_warning ("Unknown link action type: %d", link_action->getKind ());
 789                 }
 790
 791                 *title = g_strdup (unicode_to_char (anItem, pdf_document->umap));
 792         } else if (link_title) {
 793                 *title = g_strdup (unicode_to_char (anItem, pdf_document->umap));
 794         }
 795
 796         *type = EV_DOCUMENT_BOOKMARKS_TYPE_LINK;
 797         *page = page_num;
 798
 799         return TRUE;
 800 }
 801
 802 static EvDocumentBookmarksIter *
 803 pdf_document_bookmarks_get_child (EvDocumentBookmarks     *document_bookmarks,
 804                                   EvDocumentBookmarksIter *bookmarks_iter)
 805 {
 806         BookmarksIter *iter = (BookmarksIter *)bookmarks_iter;
 807         BookmarksIter *child_iter;
 808         OutlineItem *anItem;
 809
 810         g_return_val_if_fail (PDF_IS_DOCUMENT (document_bookmarks), FALSE);
 811
 812         anItem = (OutlineItem *)iter->items->get(iter->index);
 813         anItem->open ();
 814         if (! (anItem->hasKids() && anItem->getKids()) )
 815                 return NULL;
 816
 817         child_iter = g_new0 (BookmarksIter, 1);
 818         child_iter->index = 0;
 819         child_iter->level = iter->level + 1;
 820         child_iter->items = anItem->getKids ();
 821         g_assert (child_iter->items);
 822
 823         return (EvDocumentBookmarksIter *) child_iter;
 824 }
 825
 826 static gboolean
 827 pdf_document_bookmarks_next (EvDocumentBookmarks     *document_bookmarks,
 828                              EvDocumentBookmarksIter *bookmarks_iter)
 829 {
 830         BookmarksIter *iter = (BookmarksIter *) bookmarks_iter;
 831
 832         g_return_val_if_fail (PDF_IS_DOCUMENT (document_bookmarks), FALSE);
 833
 834         iter->index++;
 835         if (iter->index >= iter->items->getLength())
 836                 return FALSE;
 837
 838         return TRUE;
 839 }
 840
 841 static void
 842 pdf_document_bookmarks_free_iter (EvDocumentBookmarks     *document_bookmarks,
 843                                   EvDocumentBookmarksIter *iter)
 844 {
 845         g_return_if_fail (PDF_IS_DOCUMENT (document_bookmarks));
 846         g_return_if_fail (iter != NULL);
 847
 848         /* FIXME: Should I close all the nodes?? Free them? */
 849         g_free (iter);
 850 }
 851
 852 static void
 853 pdf_document_finalize (GObject *object)
 854 {
 855         PdfDocument *pdf_document = PDF_DOCUMENT (object);
 856
 857         if (pdf_document->umap) {
 858                 pdf_document->umap->decRefCnt ();
 859                 pdf_document->umap = NULL;
 860         }
 861
 862         if (pdf_document->search)
 863                 pdf_document_search_free (pdf_document->search);
 864
 865         if (pdf_document->target)
 866                 g_object_unref (pdf_document->target);
 867
 868         if (pdf_document->out)
 869                 delete pdf_document->out;
 870         if (pdf_document->ps_out)
 871                 delete pdf_document->ps_out;
 872         if (pdf_document->doc)
 873                 delete pdf_document->doc;
 874
 875 }
 876
 877 static void
 878 pdf_document_set_property (GObject *object,
 879                            guint prop_id,
 880                            const GValue *value,
 881                            GParamSpec *pspec)
 882 {
 883         switch (prop_id)
 884
 885         {
 886                 case PROP_TITLE:
 887                         /* read only */
 888                         break;
 889         }
 890 }
 891
 892 static gboolean
 893 has_unicode_marker (GString *string)
 894 {
 895         return ((string->getChar (0) & 0xff) == 0xfe &&
 896                 (string->getChar (1) & 0xff) == 0xff);
 897 }
 898
 899 static gchar *
 900 pdf_info_dict_get_string (Dict *info_dict, const gchar *key) {
 901         Object obj;
 902         GString *value;
 903         gchar *result;
 904
 905         g_return_val_if_fail (info_dict != NULL, NULL);
 906         g_return_val_if_fail (key != NULL, NULL);
 907
 908         if (!info_dict->lookup ((gchar *)key, &obj)->isString ()) {
 909                 obj.free ();
 910                 return g_strdup (_("Unknown"));
 911         }
 912
 913         value = obj.getString ();
 914
 915         if (has_unicode_marker (value)) {
 916                 result = g_convert (value->getCString () + 2,
 917                                     value->getLength () - 2,
 918                                     "UTF-8", "UTF-16BE", NULL, NULL, NULL);
 919         } else {
 920                 result = g_strndup (value->getCString (), value->getLength ());
 921         }
 922
 923         obj.free ();
 924
 925         return result;
 926 }
 927
 928 static char *
 929 pdf_document_get_title (PdfDocument *pdf_document)
 930 {
 931         char *title = NULL;
 932         Object info;
 933
 934         pdf_document->doc->getDocInfo (&info);
 935
 936         if (info.isDict ()) {
 937                 title = pdf_info_dict_get_string (info.getDict(), "Title");
 938         }
 939
 940         return title;
 941 }
 942
 943 static void
 944 pdf_document_get_property (GObject *object,
 945                            guint prop_id,
 946                            GValue *value,
 947                            GParamSpec *pspec)
 948 {
 949         PdfDocument *pdf_document = PDF_DOCUMENT (object);
 950         char *title;
 951
 952         switch (prop_id)
 953         {
 954                 case PROP_TITLE:
 955                         title = pdf_document_get_title (pdf_document);
 956                         g_value_set_string (value, title);
 957                         g_free (title);
 958                         break;
 959         }
 960 }
 961
 962 static void
 963 pdf_document_class_init (PdfDocumentClass *klass)
 964 {
 965         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 966
 967         gobject_class->finalize = pdf_document_finalize;
 968         gobject_class->get_property = pdf_document_get_property;
 969         gobject_class->set_property = pdf_document_set_property;
 970
 971         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
 972 }
 973
 974 static void
 975 pdf_document_document_iface_init (EvDocumentIface *iface)
 976 {
 977         iface->load = pdf_document_load;
 978         iface->get_n_pages = pdf_document_get_n_pages;
 979         iface->set_page = pdf_document_set_page;
 980         iface->get_page = pdf_document_get_page;
 981         iface->set_scale = pdf_document_set_scale;
 982         iface->set_target = pdf_document_set_target;
 983         iface->set_page_offset = pdf_document_set_page_offset;
 984         iface->get_page_size = pdf_document_get_page_size;
 985         iface->render = pdf_document_render;
 986 }
 987
 988 static void
 989 pdf_document_ps_exporter_iface_init (EvPSExporterIface *iface)
 990 {
 991         iface->begin = pdf_document_ps_export_begin;
 992         iface->do_page = pdf_document_ps_export_do_page;
 993         iface->end = pdf_document_ps_export_end;
 994 }
 995
 996
 997 static void
 998 pdf_document_find_iface_init (EvDocumentFindIface *iface)
 999 {
1000         iface->begin = pdf_document_find_begin;
1001         iface->cancel = pdf_document_find_cancel;
1002 }
1003
1004 static void
1005 pdf_document_document_bookmarks_iface_init (EvDocumentBookmarksIface *iface)
1006 {
1007         iface->has_document_bookmarks = pdf_document_bookmarks_has_document_bookmarks;
1008         iface->begin_read = pdf_document_bookmarks_begin_read;
1009         iface->get_values = pdf_document_bookmarks_get_values;
1010         iface->get_child = pdf_document_bookmarks_get_child;
1011         iface->next = pdf_document_bookmarks_next;
1012         iface->free_iter = pdf_document_bookmarks_free_iter;
1013 }
1014
1015 /* Thumbnails */
1016 static GdkPixbuf *
1017 pdf_document_thumbnails_get_page_pixbuf (PdfDocument *pdf_document,
1018                                          gdouble      scale_factor,
1019                                          gint         page_num,
1020                                          gint         width,
1021                                          gint         height)
1022 {
1023         GdkPixmap *pixmap;
1024         GDKSplashOutputDev *output;
1025         GdkPixbuf *pixbuf;
1026         GdkPixbuf *shadow;
1027
1028         pixmap = gdk_pixmap_new (pdf_document->target,
1029                                  width, height, -1);
1030
1031         output = new GDKSplashOutputDev (gdk_drawable_get_screen (pdf_document->target),
1032                                          NULL, NULL);
1033         output->startDoc (pdf_document->doc->getXRef());
1034         pdf_document->doc->displayPage (output,
1035                                         page_num + 1,
1036                                         72*scale_factor,
1037                                         72*scale_factor,
1038                                         0, gTrue, gFalse);
1039         output->redraw (0, 0,
1040                         pixmap,
1041                         0, 0,
1042                         width, height);
1043         pixbuf = gdk_pixbuf_get_from_drawable (NULL,
1044                                                pixmap,
1045                                                NULL,
1046                                                0, 0,
1047                                                0, 0,
1048                                                width, height);
1049         gdk_drawable_unref (pixmap);
1050         delete output;
1051
1052         shadow = ev_document_misc_get_thumbnail_frame (-1, -1, pixbuf);
1053         g_object_unref (pixbuf);
1054
1055         return shadow;
1056 }
1057
1058 static GdkPixbuf *
1059 pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
1060                                        gint                  page,
1061                                        gint                  width)
1062 {
1063         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1064         GdkPixbuf *thumbnail;
1065         Page *the_page;
1066         Object the_thumb;
1067         Thumb *thumb = NULL;
1068         gboolean have_ethumbs = FALSE;
1069         gdouble page_ratio;
1070         gint dest_height;
1071
1072         /* getPage seems to want page + 1 for some reason; */
1073         the_page = pdf_document->doc->getCatalog ()->getPage (page + 1);
1074         the_page->getThumb(&the_thumb);
1075
1076         page_ratio = the_page->getHeight () / the_page->getWidth ();
1077         dest_height = (gint) (width * page_ratio);
1078
1079
1080         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1081                 /* Build the thumbnail object */
1082                 thumb = new Thumb(pdf_document->doc->getXRef (),
1083                                   &the_thumb);
1084
1085                 have_ethumbs = thumb->ok();
1086         }
1087
1088         if (have_ethumbs) {
1089                 guchar *data;
1090                 GdkPixbuf *tmp_pixbuf;
1091
1092                 data = thumb->getPixbufData();
1093                 tmp_pixbuf = gdk_pixbuf_new_from_data (data,
1094                                                        GDK_COLORSPACE_RGB,
1095                                                        FALSE,
1096                                                        8,
1097                                                        thumb->getWidth (),
1098                                                        thumb->getHeight (),
1099                                                        thumb->getWidth () * 3,
1100                                                        NULL, NULL);
1101                 /* FIXME: do we want to check that the thumb's size isn't ridiculous?? */
1102                 thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
1103                 g_object_unref (tmp_pixbuf);
1104         } else {
1105                 gdouble scale_factor;
1106
1107                 scale_factor = (gdouble)width / the_page->getWidth ();
1108
1109                 thumbnail = pdf_document_thumbnails_get_page_pixbuf (pdf_document,
1110                                                                      scale_factor,
1111                                                                      page,
1112                                                                      width,
1113                                                                      dest_height);
1114         }
1115
1116         return thumbnail;
1117 }
1118 static void
1119 pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
1120 {
1121         iface->get_thumbnail = pdf_document_thumbnails_get_thumbnail;
1122 }
1123
1124
1125 static void
1126 pdf_document_init (PdfDocument *pdf_document)
1127 {
1128         pdf_document->page = 1;
1129         pdf_document->page_x_offset = 0;
1130         pdf_document->page_y_offset = 0;
1131         pdf_document->scale = 1.;
1132
1133         pdf_document->page_valid = FALSE;
1134 }
1135