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-links.h"
  28 #include "ev-document-misc.h"
  29 #include "ev-document-security.h"
  30 #include "ev-document-thumbnails.h"
  31
  32 #include "GlobalParams.h"
  33 #include "GDKSplashOutputDev.h"
  34 #include "SplashBitmap.h"
  35 #include "PDFDoc.h"
  36 #include "Outline.h"
  37 #include "ErrorCodes.h"
  38 #include "UnicodeMap.h"
  39 #include "GlobalParams.h"
  40 #include "GfxState.h"
  41 #include "Thumb.h"
  42 #include "goo/GList.h"
  43 #include "PSOutputDev.h"
  44
  45 enum {
  46         PROP_0,
  47         PROP_TITLE
  48 };
  49
  50 typedef struct
  51 {
  52         PdfDocument *document;
  53         gunichar *ucs4;
  54         glong ucs4_len;
  55         guint idle;
  56         /* full results are only possible for the rendered current page */
  57         int current_page;
  58         GArray *current_page_results;
  59         guchar *other_page_flags; /* length n_pages + 1, first element ignored */
  60         int start_page;   /* skip this one as we iterate, since we did it first */
  61         int search_page;  /* the page we're searching now */
  62         TextOutputDev *output_dev;
  63 } PdfDocumentSearch;
  64
  65 typedef struct _PdfDocumentClass PdfDocumentClass;
  66
  67 #define PDF_DOCUMENT_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), PDF_TYPE_DOCUMENT, PdfDocumentClass))
  68 #define PDF_IS_DOCUMENT_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), PDF_TYPE_DOCUMENT))
  69 #define PDF_DOCUMENT_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), PDF_TYPE_DOCUMENT, PdfDocumentClass))
  70
  71 struct _PdfDocumentClass
  72 {
  73         GObjectClass parent_class;
  74 };
  75
  76 struct _PdfDocument
  77 {
  78         GObject parent_instance;
  79
  80         int page;
  81         int page_x_offset;
  82         int page_y_offset;
  83         double scale;
  84         GdkDrawable *target;
  85
  86         GDKSplashOutputDev *out;
  87         PSOutputDev *ps_out;
  88         PDFDoc *doc;
  89         Links *links;
  90         UnicodeMap *umap;
  91
  92         gchar *password;
  93         gboolean page_valid;
  94
  95         PdfDocumentSearch *search;
  96 };
  97
  98 static void pdf_document_document_links_iface_init      (EvDocumentLinksIface      *iface);
  99 static void pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
 100 static void pdf_document_document_iface_init            (EvDocumentIface           *iface);
 101 static void pdf_document_ps_exporter_iface_init         (EvPSExporterIface         *iface);
 102 static void pdf_document_find_iface_init                (EvDocumentFindIface       *iface);
 103 static void pdf_document_security_iface_init            (EvDocumentSecurityIface   *iface);
 104 static void pdf_document_search_free                    (PdfDocumentSearch         *search);
 105 static void pdf_document_search_page_changed            (PdfDocumentSearch         *search);
 106
 107
 108 G_DEFINE_TYPE_WITH_CODE (PdfDocument, pdf_document, G_TYPE_OBJECT,
 109                          {
 110                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
 111                                                         pdf_document_document_iface_init);
 112                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS,
 113                                                         pdf_document_document_links_iface_init);
 114                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
 115                                                         pdf_document_document_thumbnails_iface_init);
 116                                  G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
 117                                                         pdf_document_ps_exporter_iface_init);
 118                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND,
 119                                                         pdf_document_find_iface_init);
 120                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_SECURITY,
 121                                                         pdf_document_security_iface_init);
 122                          });
 123
 124 static void
 125 document_init_links (PdfDocument *pdf_document)
 126 {
 127         Page *page;
 128         Object obj;
 129
 130         if (pdf_document->links) {
 131                 delete pdf_document->links;
 132         }
 133         page = pdf_document->doc->getCatalog ()->getPage (pdf_document->page);
 134         pdf_document->links = new Links (page->getAnnots (&obj),
 135                                          pdf_document->doc->getCatalog ()->getBaseURI ());
 136         obj.free ();
 137 }
 138
 139 static gboolean
 140 document_validate_page (PdfDocument *pdf_document)
 141 {
 142         if (!pdf_document->page_valid) {
 143                 pdf_document->doc->displayPage (pdf_document->out, pdf_document->page,
 144                                                 72 * pdf_document->scale,
 145                                                 72 * pdf_document->scale,
 146                                                 0, gTrue, gTrue);
 147
 148                 document_init_links (pdf_document);
 149
 150                 pdf_document->page_valid = TRUE;
 151
 152                 ev_document_changed (EV_DOCUMENT (pdf_document));
 153
 154                 /* Update the search results available to the app since
 155                  * we only provide full results on the current page
 156                  */
 157                 if (pdf_document->search)
 158                         pdf_document_search_page_changed (pdf_document->search);
 159         }
 160
 161         return pdf_document->page_valid;
 162 }
 163
 164 static gboolean
 165 pdf_document_load (EvDocument  *document,
 166                    const char  *uri,
 167                    GError     **error)
 168 {
 169         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 170         PDFDoc *newDoc;
 171         int err;
 172         char *filename;
 173         GString *filename_g;
 174         GString *enc;
 175
 176         if (!globalParams) {
 177                 globalParams = new GlobalParams("/etc/xpdfrc");
 178                 globalParams->setupBaseFontsFc(NULL);
 179         }
 180
 181         if (! pdf_document->umap) {
 182                 enc = new GString("UTF-8");
 183                 pdf_document->umap = globalParams->getUnicodeMap(enc);
 184                 pdf_document->umap->incRefCnt ();
 185                 delete enc;
 186         }
 187
 188         filename = g_filename_from_uri (uri, NULL, error);
 189         if (!filename)
 190                 return FALSE;
 191
 192         filename_g = new GString (filename);
 193         g_free (filename);
 194
 195         // open the PDF file, assumes ownership of filename_g
 196         GString *password = NULL;
 197         if (pdf_document->password)
 198                 password = new GString (pdf_document->password);
 199         newDoc = new PDFDoc(filename_g, password, password);
 200         if (password)
 201                 delete password;
 202
 203         if (!newDoc->isOk()) {
 204                 err = newDoc->getErrorCode();
 205                 delete newDoc;
 206                 if (err == errEncrypted) {
 207                         g_set_error (error, EV_DOCUMENT_ERROR,
 208                                      EV_DOCUMENT_ERROR_ENCRYPTED,
 209                                      "Document is encrypted.");
 210                 } else {
 211                         g_set_error (error, G_FILE_ERROR,
 212                                      G_FILE_ERROR_FAILED,
 213                                      "Failed to load document (error %d) '%s'\n",
 214                                      err,
 215                                      uri);
 216                 }
 217
 218                 return FALSE;
 219         }
 220
 221         if (pdf_document->doc)
 222                 delete pdf_document->doc;
 223         pdf_document->doc = newDoc;
 224
 225         pdf_document->page = 1;
 226
 227         if (pdf_document->out)
 228                 pdf_document->out->startDoc(pdf_document->doc->getXRef());
 229
 230         pdf_document->page_valid = FALSE;
 231
 232         g_object_notify (G_OBJECT (pdf_document), "title");
 233
 234         return TRUE;
 235 }
 236
 237 static gboolean
 238 pdf_document_save (EvDocument  *document,
 239                    const char  *uri,
 240                    GError     **error)
 241 {
 242         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 243         char *filename;
 244         gboolean retval = FALSE;
 245
 246         filename = g_filename_from_uri (uri, NULL, error);
 247         if (filename != NULL) {
 248                 GString *fname = new GString (filename);
 249
 250                 retval = pdf_document->doc->saveAs (fname);
 251         }
 252
 253         return retval;
 254 }
 255
 256 static int
 257 pdf_document_get_n_pages (EvDocument  *document)
 258 {
 259         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 260
 261         if (pdf_document->doc)
 262                 return pdf_document->doc->getNumPages();
 263         else
 264                 return 1;
 265 }
 266
 267 static void
 268 pdf_document_set_page (EvDocument  *document,
 269                        int          page)
 270 {
 271         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 272
 273         page = CLAMP (page, 1, ev_document_get_n_pages (document));
 274
 275         if (page != pdf_document->page) {
 276                 pdf_document->page = page;
 277                 pdf_document->page_valid = FALSE;
 278         }
 279 }
 280
 281 static int
 282 pdf_document_get_page (EvDocument  *document)
 283 {
 284         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 285
 286         return pdf_document->page;
 287 }
 288
 289 static void
 290 redraw_callback (void *data)
 291 {
 292         /* Need to hook up through a EvDocument callback? */
 293 }
 294
 295 static void
 296 pdf_document_set_target (EvDocument  *document,
 297                          GdkDrawable *target)
 298 {
 299         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 300
 301         if (pdf_document->target != target) {
 302                 if (pdf_document->target)
 303                         g_object_unref (pdf_document->target);
 304
 305                 pdf_document->target = target;
 306
 307                 if (pdf_document->target)
 308                         g_object_ref (pdf_document->target);
 309
 310                 if (pdf_document->out) {
 311                         delete pdf_document->out;
 312                         pdf_document->out = NULL;
 313                 }
 314
 315                 if (pdf_document->target) {
 316                         pdf_document->out = new GDKSplashOutputDev (gdk_drawable_get_screen (pdf_document->target),
 317                                                          redraw_callback, (void*) document);
 318
 319                         if (pdf_document->doc)
 320                                 pdf_document->out->startDoc(pdf_document->doc->getXRef());
 321
 322                 }
 323
 324                 pdf_document->page_valid = FALSE;
 325         }
 326 }
 327
 328 static void
 329 pdf_document_set_scale (EvDocument  *document,
 330                         double       scale)
 331 {
 332         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 333
 334         if (pdf_document->scale != scale) {
 335                 pdf_document->scale = scale;
 336                 pdf_document->page_valid = FALSE;
 337         }
 338 }
 339
 340 static void
 341 pdf_document_set_page_offset (EvDocument  *document,
 342                               int          x,
 343                               int          y)
 344 {
 345         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 346
 347         pdf_document->page_x_offset = x;
 348         pdf_document->page_y_offset = y;
 349 }
 350
 351 static void
 352 pdf_document_get_page_size (EvDocument   *document,
 353                             int          *width,
 354                             int          *height)
 355 {
 356         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 357
 358         if (document_validate_page (pdf_document)) {
 359                 if (width)
 360                         *width = pdf_document->out->getBitmapWidth();
 361                 if (height)
 362                         *height = pdf_document->out->getBitmapHeight();
 363         } else {
 364                 if (width)
 365                         *width = 1;
 366                 if (height)
 367                         *height = 1;
 368         }
 369 }
 370
 371 static void
 372 pdf_document_render (EvDocument  *document,
 373                      int          clip_x,
 374                      int          clip_y,
 375                      int          clip_width,
 376                      int          clip_height)
 377 {
 378         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 379         GdkRectangle page;
 380         GdkRectangle draw;
 381
 382         if (!document_validate_page (pdf_document) || !pdf_document->target)
 383                 return;
 384
 385         page.x = pdf_document->page_x_offset;
 386         page.y = pdf_document->page_y_offset;
 387         page.width = pdf_document->out->getBitmapWidth();
 388         page.height = pdf_document->out->getBitmapHeight();
 389
 390         draw.x = clip_x;
 391         draw.y = clip_y;
 392         draw.width = clip_width;
 393         draw.height = clip_height;
 394
 395         if (gdk_rectangle_intersect (&page, &draw, &draw))
 396                 pdf_document->out->redraw (draw.x - page.x, draw.y - page.y,
 397                                            pdf_document->target,
 398                                            draw.x, draw.y,
 399                                            draw.width, draw.height);
 400 }
 401
 402 static void
 403 pdf_document_search_emit_found (PdfDocumentSearch *search)
 404 {
 405         PdfDocument *pdf_document = search->document;
 406         int n_pages;
 407         int pages_done;
 408         GArray *tmp_results;
 409         int i;
 410
 411         n_pages = ev_document_get_n_pages (EV_DOCUMENT (search->document));
 412         if (search->search_page > search->start_page) {
 413                 pages_done = search->search_page - search->start_page;
 414         } else if (search->search_page == search->start_page) {
 415                 pages_done = n_pages;
 416         } else {
 417                 pages_done = n_pages - search->start_page + search->search_page;
 418         }
 419
 420         tmp_results = g_array_new (FALSE, FALSE, sizeof (EvFindResult));
 421         g_array_append_vals (tmp_results,
 422                              search->current_page_results->data,
 423                              search->current_page_results->len);
 424
 425         /* Now append a bogus element for each page that has a result in it,
 426          * that is not the current page
 427          */
 428         i = 1;
 429         while (i <= n_pages) {
 430                 if (i != pdf_document->page &&
 431                     search->other_page_flags[i]) {
 432                         EvFindResult result;
 433
 434                         result.page_num = i;
 435
 436                         /* Use bogus coordinates, again we can't get coordinates
 437                          * until this is the current page because TextOutputDev
 438                          * isn't good enough
 439                          */
 440                         result.highlight_area.x = -1;
 441                         result.highlight_area.y = -1;
 442                         result.highlight_area.width = 1;
 443                         result.highlight_area.height = 1;
 444
 445                         g_array_append_val (tmp_results, result);
 446                 }
 447
 448                 ++i;
 449         }
 450
 451         ev_document_find_found (EV_DOCUMENT_FIND (pdf_document),
 452                                 (EvFindResult*) tmp_results->data,
 453                                 tmp_results->len,
 454                                 pages_done / (double) n_pages);
 455
 456         g_array_free (tmp_results, TRUE);
 457 }
 458
 459 static void
 460 pdf_document_search_page_changed (PdfDocumentSearch   *search)
 461 {
 462         PdfDocument *pdf_document = search->document;
 463         int current_page;
 464         EvFindResult result;
 465         int xMin, yMin, xMax, yMax;
 466
 467         current_page = pdf_document->page;
 468
 469         if (!pdf_document->page_valid) {
 470                 /* we can't do anything until displayPage() */
 471                 search->current_page = -1;
 472                 return;
 473         }
 474
 475         if (search->current_page == current_page)
 476                 return;
 477
 478         /* We need to create current_page_results for the new current page */
 479         g_array_set_size (search->current_page_results, 0);
 480
 481         if (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 482                                          gTrue, gTrue, // startAtTop, stopAtBottom
 483                                          gFalse, gFalse, // startAtLast, stopAtLast
 484                                          &xMin, &yMin, &xMax, &yMax)) {
 485                 result.page_num = pdf_document->page;
 486
 487                 result.highlight_area.x = xMin;
 488                 result.highlight_area.y = yMin;
 489                 result.highlight_area.width = xMax - xMin;
 490                 result.highlight_area.height = yMax - yMin;
 491
 492                 g_array_append_val (search->current_page_results, result);
 493                 /* Now find further results */
 494
 495                 while (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 496                                                     gFalse, gTrue,
 497                                                     gTrue, gFalse,
 498                                                     &xMin, &yMin, &xMax, &yMax)) {
 499
 500                         result.page_num = pdf_document->page;
 501
 502                         result.highlight_area.x = xMin;
 503                         result.highlight_area.y = yMin;
 504                         result.highlight_area.width = xMax - xMin;
 505                         result.highlight_area.height = yMax - yMin;
 506
 507                         g_array_append_val (search->current_page_results, result);
 508                 }
 509         }
 510
 511         /* needed for the initial current page since we don't search
 512          * it in the idle
 513          */
 514         search->other_page_flags[current_page] =
 515                 search->current_page_results->len > 0;
 516
 517         pdf_document_search_emit_found (search);
 518 }
 519
 520 static gboolean
 521 pdf_document_search_idle_callback (void *data)
 522 {
 523         PdfDocumentSearch *search = (PdfDocumentSearch*) data;
 524         PdfDocument *pdf_document = search->document;
 525         int n_pages;
 526         double xMin, yMin, xMax, yMax;
 527
 528         /* Note that PDF page count is 1 through n_pages INCLUSIVE
 529          * like a real book. We are looking to add one result for each
 530          * page with a match, because the coordinates are meaningless
 531          * with TextOutputDev, so we just want to flag matching pages
 532          * and then when the user switches to the current page, we
 533          * will emit "found" again with the real results.
 534          */
 535         n_pages = ev_document_get_n_pages (EV_DOCUMENT (search->document));
 536
 537         if (search->search_page == search->start_page) {
 538                 goto end_search;
 539         }
 540
 541         if (search->output_dev == 0) {
 542                 /* First time through here... */
 543                 search->output_dev = new TextOutputDev (NULL, gTrue, gFalse, gFalse);
 544                 if (!search->output_dev->isOk()) {
 545                         goto end_search;
 546                 }
 547         }
 548
 549         pdf_document->doc->displayPage (search->output_dev,
 550                                         search->search_page,
 551                                         72, 72, 0, gTrue, gFalse);
 552
 553         if (search->output_dev->findText (search->ucs4,
 554                                           search->ucs4_len,
 555                                           gTrue, gTrue, // startAtTop, stopAtBottom
 556                                           gFalse, gFalse, // startAtLast, stopAtLast
 557                                           &xMin, &yMin, &xMax, &yMax)) {
 558                 /* This page has results */
 559                 search->other_page_flags[search->search_page] = TRUE;
 560         }
 561
 562         search->search_page += 1;
 563         if (search->search_page > n_pages) {
 564                 /* wrap around */
 565                 search->search_page = 1;
 566         }
 567
 568         /* We do this even if nothing was found, to update the percent complete */
 569         pdf_document_search_emit_found (search);
 570
 571         return TRUE;
 572
 573  end_search:
 574         /* We're done. */
 575         search->idle = 0; /* will return FALSE to remove */
 576         return FALSE;
 577 }
 578
 579 static void
 580 pdf_document_find_begin (EvDocumentFind   *document,
 581                          const char       *search_string,
 582                          gboolean          case_sensitive)
 583 {
 584         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 585         PdfDocumentSearch *search;
 586         int n_pages;
 587         gunichar *ucs4;
 588         glong ucs4_len;
 589
 590         /* FIXME handle case_sensitive (right now XPDF
 591          * code is always case insensitive for ASCII
 592          * and case sensitive for all other languaages)
 593          */
 594
 595         g_assert (sizeof (gunichar) == sizeof (Unicode));
 596         ucs4 = g_utf8_to_ucs4_fast (search_string, -1,
 597                                     &ucs4_len);
 598
 599         if (pdf_document->search &&
 600             pdf_document->search->ucs4_len == ucs4_len &&
 601             memcmp (pdf_document->search->ucs4,
 602                     ucs4,
 603                     sizeof (gunichar) * ucs4_len) == 0) {
 604                 /* Search is unchanged */
 605                 g_free (ucs4);
 606                 return;
 607         }
 608
 609         if (pdf_document->search) {
 610                 pdf_document_search_free (pdf_document->search);
 611                 pdf_document->search = NULL;
 612         }
 613
 614         search = g_new0 (PdfDocumentSearch, 1);
 615
 616         search->ucs4 = ucs4;
 617         search->ucs4_len = ucs4_len;
 618
 619         search->current_page_results = g_array_new (FALSE,
 620                                                     FALSE,
 621                                                     sizeof (EvFindResult));
 622         n_pages = ev_document_get_n_pages (EV_DOCUMENT (document));
 623
 624         /* This is an array of bool; with the first value ignored
 625          * so we can index by the based-at-1 page numbers
 626          */
 627         search->other_page_flags = g_new0 (guchar, n_pages + 1);
 628
 629         search->document = pdf_document;
 630
 631         /* We add at low priority so the progress bar repaints */
 632         search->idle = g_idle_add_full (G_PRIORITY_LOW,
 633                                         pdf_document_search_idle_callback,
 634                                         search,
 635                                         NULL);
 636
 637         search->output_dev = 0;
 638
 639         search->start_page = pdf_document->page;
 640         search->search_page = search->start_page + 1;
 641         if (search->search_page > n_pages)
 642                 search->search_page = 1;
 643
 644         search->current_page = -1;
 645
 646         pdf_document->search = search;
 647
 648         /* Update for the current page right away */
 649         pdf_document_search_page_changed (search);
 650 }
 651
 652 static void
 653 pdf_document_find_cancel (EvDocumentFind   *document)
 654 {
 655         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 656
 657         if (pdf_document->search) {
 658                 pdf_document_search_free (pdf_document->search);
 659                 pdf_document->search = NULL;
 660         }
 661 }
 662
 663 static void
 664 pdf_document_search_free (PdfDocumentSearch   *search)
 665 {
 666         if (search->idle != 0)
 667                 g_source_remove (search->idle);
 668
 669         if (search->output_dev)
 670                 delete search->output_dev;
 671
 672         g_array_free (search->current_page_results, TRUE);
 673         g_free (search->other_page_flags);
 674
 675         g_free (search->ucs4);
 676         g_free (search);
 677 }
 678
 679 static gboolean
 680 pdf_document_has_document_security (EvDocumentSecurity *document_security)
 681 {
 682         /* FIXME: do we really need to have this? */
 683         return FALSE;
 684 }
 685
 686 static void
 687 pdf_document_set_password (EvDocumentSecurity *document_security,
 688                            const char         *password)
 689 {
 690         PdfDocument *document = PDF_DOCUMENT (document_security);
 691
 692         if (document->password)
 693                 g_free (document->password);
 694
 695         document->password = g_strdup (password);
 696 }
 697
 698 static void
 699 pdf_document_ps_export_begin (EvPSExporter *exporter, const char *filename)
 700 {
 701         PdfDocument *document = PDF_DOCUMENT (exporter);
 702
 703         if (document->ps_out)
 704                 delete document->ps_out;
 705
 706         document->ps_out = new PSOutputDev ((char *)filename, document->doc->getXRef(),
 707                                             document->doc->getCatalog(), 1,
 708                                             ev_document_get_n_pages (EV_DOCUMENT (document)),
 709                                             psModePS);
 710 }
 711
 712 static void
 713 pdf_document_ps_export_do_page (EvPSExporter *exporter, int page)
 714 {
 715         PdfDocument *document = PDF_DOCUMENT (exporter);
 716
 717         document->doc->displayPage (document->ps_out, page,
 718                                     72.0, 72.0, 0, gTrue, gFalse);
 719 }
 720
 721 static void
 722 pdf_document_ps_export_end (EvPSExporter *exporter)
 723 {
 724         PdfDocument *document = PDF_DOCUMENT (exporter);
 725
 726         delete document->ps_out;
 727         document->ps_out = NULL;
 728 }
 729
 730
 731 /* EvDocumentLinks Implementation */
 732 typedef struct
 733 {
 734         /* goo GList, not glib */
 735         GList *items;
 736         int index;
 737         int level;
 738 } LinksIter;
 739
 740 static gchar *
 741 unicode_to_char (OutlineItem *outline_item,
 742                  UnicodeMap *uMap)
 743 {
 744         GString gstr;
 745         gchar buf[8]; /* 8 is enough for mapping an unicode char to a string */
 746         int i, n;
 747
 748         for (i = 0; i < outline_item->getTitleLength(); ++i) {
 749                 n = uMap->mapUnicode(outline_item->getTitle()[i], buf, sizeof(buf));
 750                 gstr.append(buf, n);
 751         }
 752
 753         return g_strdup (gstr.getCString ());
 754 }
 755
 756
 757 static gboolean
 758 pdf_document_links_has_document_links (EvDocumentLinks *document_links)
 759 {
 760         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 761         Outline *outline;
 762
 763         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 764
 765         outline = pdf_document->doc->getOutline();
 766         if (outline->getItems() != NULL &&
 767             outline->getItems()->getLength() > 0)
 768                 return TRUE;
 769
 770         return FALSE;
 771 }
 772
 773 static EvDocumentLinksIter *
 774 pdf_document_links_begin_read (EvDocumentLinks *document_links)
 775 {
 776         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 777         Outline *outline;
 778         LinksIter *iter;
 779         GList *items;
 780
 781         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), NULL);
 782
 783         outline = pdf_document->doc->getOutline();
 784         items = outline->getItems();
 785         if (! items)
 786                 return NULL;
 787
 788         iter = g_new0 (LinksIter, 1);
 789         iter->items = items;
 790         iter->index = 0;
 791         iter->level = 0;
 792
 793         return (EvDocumentLinksIter *) iter;
 794 }
 795
 796 static EvLink *
 797 build_link_from_action (PdfDocument *pdf_document,
 798                         LinkAction  *link_action,
 799                         const char  *title)
 800 {
 801         EvLink *link = NULL;
 802
 803         if (link_action == NULL) {
 804                 link = ev_link_new_title (title);
 805         } else if (link_action->getKind () == actionGoTo) {
 806                 LinkDest *link_dest;
 807                 LinkGoTo *link_goto;
 808                 Ref page_ref;
 809                 gint page_num = 0;
 810                 GString *named_dest;
 811
 812                 link_goto = dynamic_cast <LinkGoTo *> (link_action);
 813                 link_dest = link_goto->getDest ();
 814                 named_dest = link_goto->getNamedDest ();
 815
 816                 /* Wow!  This seems excessively slow on large
 817                  * documents. I need to investigate more... -jrb */
 818                 if (link_dest != NULL) {
 819                         link_dest = link_dest->copy ();
 820                 } else if (named_dest != NULL) {
 821                         named_dest = named_dest->copy ();
 822                         link_dest = pdf_document->doc->findDest (named_dest);
 823                         delete named_dest;
 824                 }
 825                 if (link_dest != NULL) {
 826                         if (link_dest->isPageRef ()) {
 827                                 page_ref = link_dest->getPageRef ();
 828                                 page_num = pdf_document->doc->findPage (page_ref.num, page_ref.gen);
 829                         } else {
 830                                 page_num = link_dest->getPageNum ();
 831                         }
 832                         delete link_dest;
 833                 }
 834
 835                 link = ev_link_new_page (title, page_num);
 836         } else if (link_action->getKind () == actionURI) {
 837                 LinkURI *link_uri;
 838
 839                 link_uri = dynamic_cast <LinkURI *> (link_action);
 840                 link = ev_link_new_external
 841                         (title, link_uri->getURI()->getCString());
 842         } else if (link_action->getKind () == actionNamed) {
 843                         /*Skip, for now */
 844         }
 845
 846         return link;
 847 }
 848
 849 /* FIXME This returns a new object every time, probably we should cache it
 850    in the iter */
 851 static EvLink *
 852 pdf_document_links_get_link (EvDocumentLinks      *document_links,
 853                              EvDocumentLinksIter  *links_iter)
 854 {
 855         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 856         LinksIter *iter = (LinksIter *)links_iter;
 857         OutlineItem *anItem;
 858         LinkAction *link_action;
 859         Unicode *link_title;
 860         const char *title;
 861
 862         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 863         g_return_val_if_fail (iter != NULL, FALSE);
 864
 865         anItem = (OutlineItem *)iter->items->get(iter->index);
 866         link_action = anItem->getAction ();
 867         link_title = anItem->getTitle ();
 868         title = unicode_to_char (anItem, pdf_document->umap);
 869
 870         return build_link_from_action (pdf_document, link_action, title);
 871 }
 872
 873 static EvDocumentLinksIter *
 874 pdf_document_links_get_child (EvDocumentLinks     *document_links,
 875                               EvDocumentLinksIter *links_iter)
 876 {
 877         LinksIter *iter = (LinksIter *)links_iter;
 878         LinksIter *child_iter;
 879         OutlineItem *anItem;
 880
 881         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 882
 883         anItem = (OutlineItem *)iter->items->get(iter->index);
 884         anItem->open ();
 885         if (! (anItem->hasKids() && anItem->getKids()) )
 886                 return NULL;
 887
 888         child_iter = g_new0 (LinksIter, 1);
 889         child_iter->index = 0;
 890         child_iter->level = iter->level + 1;
 891         child_iter->items = anItem->getKids ();
 892         g_assert (child_iter->items);
 893
 894         return (EvDocumentLinksIter *) child_iter;
 895 }
 896
 897 static gboolean
 898 pdf_document_links_next (EvDocumentLinks     *document_links,
 899                          EvDocumentLinksIter *links_iter)
 900 {
 901         LinksIter *iter = (LinksIter *) links_iter;
 902
 903         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 904
 905         iter->index++;
 906         if (iter->index >= iter->items->getLength())
 907                 return FALSE;
 908
 909         return TRUE;
 910 }
 911
 912 static void
 913 pdf_document_links_free_iter (EvDocumentLinks     *document_links,
 914                               EvDocumentLinksIter *iter)
 915 {
 916         g_return_if_fail (PDF_IS_DOCUMENT (document_links));
 917         g_return_if_fail (iter != NULL);
 918
 919         /* FIXME: Should I close all the nodes?? Free them? */
 920         g_free (iter);
 921 }
 922
 923 static void
 924 pdf_document_finalize (GObject *object)
 925 {
 926         PdfDocument *pdf_document = PDF_DOCUMENT (object);
 927
 928         if (pdf_document->links) {
 929                 delete pdf_document->links;
 930         }
 931
 932         if (pdf_document->umap) {
 933                 pdf_document->umap->decRefCnt ();
 934                 pdf_document->umap = NULL;
 935         }
 936
 937         if (pdf_document->search)
 938                 pdf_document_search_free (pdf_document->search);
 939
 940         if (pdf_document->target)
 941                 g_object_unref (pdf_document->target);
 942
 943         if (pdf_document->out)
 944                 delete pdf_document->out;
 945         if (pdf_document->ps_out)
 946                 delete pdf_document->ps_out;
 947         if (pdf_document->doc)
 948                 delete pdf_document->doc;
 949
 950 }
 951
 952 static void
 953 pdf_document_set_property (GObject *object,
 954                            guint prop_id,
 955                            const GValue *value,
 956                            GParamSpec *pspec)
 957 {
 958         switch (prop_id)
 959
 960         {
 961                 case PROP_TITLE:
 962                         /* read only */
 963                         break;
 964         }
 965 }
 966
 967 static gboolean
 968 has_unicode_marker (GString *string)
 969 {
 970         return ((string->getChar (0) & 0xff) == 0xfe &&
 971                 (string->getChar (1) & 0xff) == 0xff);
 972 }
 973
 974 static gchar *
 975 pdf_info_dict_get_string (Dict *info_dict, const gchar *key) {
 976         Object obj;
 977         GString *value;
 978         gchar *result;
 979
 980         g_return_val_if_fail (info_dict != NULL, NULL);
 981         g_return_val_if_fail (key != NULL, NULL);
 982
 983         if (!info_dict->lookup ((gchar *)key, &obj)->isString ()) {
 984                 obj.free ();
 985                 return NULL;
 986         }
 987
 988         value = obj.getString ();
 989
 990         if (has_unicode_marker (value)) {
 991                 result = g_convert (value->getCString () + 2,
 992                                     value->getLength () - 2,
 993                                     "UTF-8", "UTF-16BE", NULL, NULL, NULL);
 994         } else {
 995                 result = g_strndup (value->getCString (), value->getLength ());
 996         }
 997
 998         obj.free ();
 999
1000         return result;
1001 }
1002
1003 static char *
1004 pdf_document_get_title (PdfDocument *pdf_document)
1005 {
1006         char *title = NULL;
1007         Object info;
1008
1009         pdf_document->doc->getDocInfo (&info);
1010
1011         if (info.isDict ()) {
1012                 title = pdf_info_dict_get_string (info.getDict(), "Title");
1013         }
1014
1015         return title;
1016 }
1017
1018 static char *
1019 pdf_document_get_text (EvDocument *document, GdkRectangle *rect)
1020 {
1021         PdfDocument *pdf_document = PDF_DOCUMENT (document);
1022         GString *sel_text = new GString;
1023         const char *text;
1024         int x1, y1, x2, y2;
1025
1026         x1 = rect->x + pdf_document->page_x_offset;
1027         y1 = rect->y + pdf_document->page_y_offset;
1028         x2 = x1 + rect->width + pdf_document->page_x_offset;
1029         y2 = y1 + rect->height + pdf_document->page_y_offset;
1030
1031         sel_text = pdf_document->out->getText (x1, y1, x2, y2);
1032         text = sel_text->getCString ();
1033
1034         return text ? g_strdup (text) : NULL;
1035 }
1036
1037 static EvLink *
1038 pdf_document_get_link (EvDocument *document, int x, int y)
1039 {
1040         PdfDocument *pdf_document = PDF_DOCUMENT (document);
1041         LinkAction *action;
1042         double link_x, link_y;
1043
1044         if (pdf_document->links == NULL) {
1045                 return NULL;
1046         }
1047
1048         /* Offset */
1049         link_x = x - pdf_document->page_x_offset;
1050         link_y = y - pdf_document->page_y_offset;
1051
1052         /* Inverse y */
1053         link_y = pdf_document->out->getBitmapHeight() - link_y;
1054
1055         /* Zoom */
1056         link_x = link_x / pdf_document->scale;
1057         link_y = link_y / pdf_document->scale;
1058
1059         action = pdf_document->links->find (link_x, link_y);
1060
1061         if (action) {
1062                 return build_link_from_action (pdf_document, action, "");
1063         } else {
1064                 return NULL;
1065         }
1066 }
1067
1068 static void
1069 pdf_document_get_property (GObject *object,
1070                            guint prop_id,
1071                            GValue *value,
1072                            GParamSpec *pspec)
1073 {
1074         PdfDocument *pdf_document = PDF_DOCUMENT (object);
1075         char *title;
1076
1077         switch (prop_id)
1078         {
1079                 case PROP_TITLE:
1080                         title = pdf_document_get_title (pdf_document);
1081                         g_value_set_string (value, title);
1082                         g_free (title);
1083                         break;
1084         }
1085 }
1086
1087 static void
1088 pdf_document_class_init (PdfDocumentClass *klass)
1089 {
1090         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1091
1092         gobject_class->finalize = pdf_document_finalize;
1093         gobject_class->get_property = pdf_document_get_property;
1094         gobject_class->set_property = pdf_document_set_property;
1095
1096         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
1097 }
1098
1099 static void
1100 pdf_document_document_iface_init (EvDocumentIface *iface)
1101 {
1102         iface->load = pdf_document_load;
1103         iface->save = pdf_document_save;
1104         iface->get_text = pdf_document_get_text;
1105         iface->get_link = pdf_document_get_link;
1106         iface->get_n_pages = pdf_document_get_n_pages;
1107         iface->set_page = pdf_document_set_page;
1108         iface->get_page = pdf_document_get_page;
1109         iface->set_scale = pdf_document_set_scale;
1110         iface->set_target = pdf_document_set_target;
1111         iface->set_page_offset = pdf_document_set_page_offset;
1112         iface->get_page_size = pdf_document_get_page_size;
1113         iface->render = pdf_document_render;
1114 }
1115
1116 static void
1117 pdf_document_ps_exporter_iface_init (EvPSExporterIface *iface)
1118 {
1119         iface->begin = pdf_document_ps_export_begin;
1120         iface->do_page = pdf_document_ps_export_do_page;
1121         iface->end = pdf_document_ps_export_end;
1122 }
1123
1124
1125 static void
1126 pdf_document_find_iface_init (EvDocumentFindIface *iface)
1127 {
1128         iface->begin = pdf_document_find_begin;
1129         iface->cancel = pdf_document_find_cancel;
1130 }
1131
1132 static void
1133 pdf_document_security_iface_init (EvDocumentSecurityIface *iface)
1134 {
1135         iface->has_document_security = pdf_document_has_document_security;
1136         iface->set_password = pdf_document_set_password;
1137 }
1138
1139 static void
1140 pdf_document_document_links_iface_init (EvDocumentLinksIface *iface)
1141 {
1142         iface->has_document_links = pdf_document_links_has_document_links;
1143         iface->begin_read = pdf_document_links_begin_read;
1144         iface->get_link = pdf_document_links_get_link;
1145         iface->get_child = pdf_document_links_get_child;
1146         iface->next = pdf_document_links_next;
1147         iface->free_iter = pdf_document_links_free_iter;
1148 }
1149
1150 /* Thumbnails */
1151
1152 static GdkPixbuf *
1153 bitmap_to_pixbuf (SplashBitmap *bitmap,
1154                   GdkPixbuf    *target,
1155                   gint          x_offset,
1156                   gint          y_offset)
1157 {
1158         gint width;
1159         gint height;
1160         SplashColorPtr dataPtr;
1161         int x, y;
1162
1163         gboolean target_has_alpha;
1164         gint target_rowstride;
1165         guchar *target_data;
1166
1167         width = bitmap->getWidth ();
1168         height = bitmap->getHeight ();
1169
1170         if (width + x_offset > gdk_pixbuf_get_width (target))
1171                 width = gdk_pixbuf_get_width (target) - x_offset;
1172         if (height + y_offset > gdk_pixbuf_get_height (target))
1173                 height = gdk_pixbuf_get_height (target) - x_offset;
1174
1175         target_has_alpha = gdk_pixbuf_get_has_alpha (target);
1176         target_rowstride = gdk_pixbuf_get_rowstride (target);
1177         target_data = gdk_pixbuf_get_pixels (target);
1178
1179         dataPtr = bitmap->getDataPtr ();
1180
1181         for (y = 0; y < height; y++) {
1182                 SplashRGB8 *p;
1183                 SplashRGB8 rgb;
1184                 guchar *q;
1185
1186                 p = dataPtr.rgb8 + y * width;
1187                 q = target_data + ((y + y_offset) * target_rowstride +
1188                                    x_offset * (target_has_alpha?4:3));
1189                 for (x = 0; x < width; x++) {
1190                         rgb = *p++;
1191
1192                         *q++ = splashRGB8R (rgb);
1193                         *q++ = splashRGB8G (rgb);
1194                         *q++ = splashRGB8B (rgb);
1195
1196                         if (target_has_alpha)
1197                                 q++;
1198                 }
1199         }
1200
1201         return target;
1202 }
1203
1204
1205 static GdkPixbuf *
1206 pdf_document_thumbnails_get_page_pixbuf (PdfDocument *pdf_document,
1207                                          gdouble      scale_factor,
1208                                          gint         page_num,
1209                                          gint         width,
1210                                          gint         height)
1211 {
1212         SplashOutputDev *output;
1213         GdkPixbuf *pixbuf;
1214         SplashColor color;
1215
1216         color.rgb8 = splashMakeRGB8 (255, 255, 255);
1217
1218         output = new SplashOutputDev (splashModeRGB8, gFalse, color);
1219         output->startDoc (pdf_document->doc->getXRef());
1220         pdf_document->doc->displayPage (output,
1221                                         page_num + 1,
1222                                         72*scale_factor,
1223                                         72*scale_factor,
1224                                         0, gTrue, gFalse);
1225
1226         pixbuf = ev_document_misc_get_thumbnail_frame (output->getBitmap()->getWidth(),
1227                                                        output->getBitmap()->getHeight(),
1228                                                        NULL);
1229         bitmap_to_pixbuf (output->getBitmap(), pixbuf, 1, 1);
1230         delete output;
1231
1232         return pixbuf;
1233 }
1234
1235 static void
1236 pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnails,
1237                                         gint                  page,
1238                                         gint                  suggested_width,
1239                                         gint                 *width,
1240                                         gint                 *height)
1241 {
1242         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1243         Page *the_page;
1244         Object the_thumb;
1245         Thumb *thumb = NULL;
1246         gdouble page_ratio;
1247
1248         /* getPage seems to want page + 1 for some reason; */
1249         the_page = pdf_document->doc->getCatalog ()->getPage (page + 1);
1250         the_page->getThumb (&the_thumb);
1251
1252         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1253                 /* Build the thumbnail object */
1254                 thumb = new Thumb(pdf_document->doc->getXRef (),
1255                                   &the_thumb);
1256
1257                 *width = thumb->getWidth ();
1258                 *height = thumb->getHeight ();
1259         } else {
1260                 page_ratio = the_page->getHeight () / the_page->getWidth ();
1261                 *width = suggested_width;
1262                 *height = (gint) (suggested_width * page_ratio);
1263         }
1264 }
1265
1266 static GdkPixbuf *
1267 pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
1268                                        gint                  page,
1269                                        gint                  width)
1270 {
1271         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1272         GdkPixbuf *thumbnail;
1273         Page *the_page;
1274         Object the_thumb;
1275         Thumb *thumb = NULL;
1276         gboolean have_ethumbs = FALSE;
1277         gdouble page_ratio;
1278         gint dest_height;
1279
1280         /* getPage seems to want page + 1 for some reason; */
1281         the_page = pdf_document->doc->getCatalog ()->getPage (page + 1);
1282         the_page->getThumb(&the_thumb);
1283
1284         page_ratio = the_page->getHeight () / the_page->getWidth ();
1285         dest_height = (gint) (width * page_ratio);
1286
1287
1288         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1289                 /* Build the thumbnail object */
1290                 thumb = new Thumb(pdf_document->doc->getXRef (),
1291                                   &the_thumb);
1292
1293                 have_ethumbs = thumb->ok();
1294         }
1295
1296         if (have_ethumbs) {
1297                 guchar *data;
1298                 GdkPixbuf *tmp_pixbuf;
1299
1300                 data = thumb->getPixbufData();
1301                 tmp_pixbuf = gdk_pixbuf_new_from_data (data,
1302                                                        GDK_COLORSPACE_RGB,
1303                                                        FALSE,
1304                                                        8,
1305                                                        thumb->getWidth (),
1306                                                        thumb->getHeight (),
1307                                                        thumb->getWidth () * 3,
1308                                                        NULL, NULL);
1309                 /* FIXME: do we want to check that the thumb's size isn't ridiculous?? */
1310                 thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
1311                 g_object_unref (tmp_pixbuf);
1312         } else {
1313                 gdouble scale_factor;
1314
1315                 scale_factor = (gdouble)width / the_page->getWidth ();
1316
1317                 thumbnail = pdf_document_thumbnails_get_page_pixbuf (pdf_document,
1318                                                                      scale_factor,
1319                                                                      page,
1320                                                                      width,
1321                                                                      dest_height);
1322         }
1323
1324         return thumbnail;
1325 }
1326 static void
1327 pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
1328 {
1329         iface->get_thumbnail = pdf_document_thumbnails_get_thumbnail;
1330         iface->get_dimensions = pdf_document_thumbnails_get_dimensions;
1331 }
1332
1333
1334 static void
1335 pdf_document_init (PdfDocument *pdf_document)
1336 {
1337         pdf_document->page = 1;
1338         pdf_document->page_x_offset = 0;
1339         pdf_document->page_y_offset = 0;
1340         pdf_document->scale = 1.;
1341
1342         pdf_document->page_valid = FALSE;
1343         pdf_document->password = NULL;
1344 }
1345