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 "ev-document-misc.h"
  27 #include "gpdf-g-switch.h"
  28 #include "ev-document-links.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         int *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           page,
 354                             int          *width,
 355                             int          *height)
 356 {
 357         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 358         Page *the_page;
 359
 360         /* set some default values */
 361         if (width)
 362                 *width = 1;
 363         if (height)
 364                 *height = 1;
 365
 366         if (page == -1)
 367                 page = pdf_document->page;
 368
 369         the_page = pdf_document->doc->getCatalog ()->getPage (page);
 370         if (the_page) {
 371                 *width = (int) ((the_page->getWidth () * pdf_document->scale) + 0.5);
 372                 *height = (int) ((the_page->getHeight () * pdf_document->scale) + 0.5);
 373         }
 374 }
 375
 376 static void
 377 pdf_document_render (EvDocument  *document,
 378                      int          clip_x,
 379                      int          clip_y,
 380                      int          clip_width,
 381                      int          clip_height)
 382 {
 383         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 384         GdkRectangle page;
 385         GdkRectangle draw;
 386
 387         if (!document_validate_page (pdf_document) || !pdf_document->target)
 388                 return;
 389
 390         page.x = pdf_document->page_x_offset;
 391         page.y = pdf_document->page_y_offset;
 392         page.width = pdf_document->out->getBitmapWidth();
 393         page.height = pdf_document->out->getBitmapHeight();
 394
 395         draw.x = clip_x;
 396         draw.y = clip_y;
 397         draw.width = clip_width;
 398         draw.height = clip_height;
 399
 400         if (gdk_rectangle_intersect (&page, &draw, &draw))
 401                 pdf_document->out->redraw (draw.x - page.x, draw.y - page.y,
 402                                            pdf_document->target,
 403                                            draw.x, draw.y,
 404                                            draw.width, draw.height);
 405 }
 406
 407 double
 408 pdf_document_find_get_progress (EvDocumentFind *document_find)
 409 {
 410         PdfDocumentSearch *search;
 411         int n_pages, pages_done;
 412
 413         search = PDF_DOCUMENT (document_find)->search;
 414
 415         if (search == NULL) {
 416                 return 0;
 417         }
 418
 419         n_pages = ev_document_get_n_pages (EV_DOCUMENT (document_find));
 420         if (search->search_page > search->start_page) {
 421                 pages_done = search->search_page - search->start_page + 1;
 422         } else if (search->search_page == search->start_page) {
 423                 pages_done = n_pages;
 424         } else {
 425                 pages_done = n_pages - search->start_page + search->search_page;
 426         }
 427
 428         return pages_done / (double) n_pages;
 429 }
 430
 431 int
 432 pdf_document_find_page_has_results (EvDocumentFind *document_find,
 433                                     int             page)
 434 {
 435         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 436
 437         g_return_val_if_fail (search != NULL, FALSE);
 438
 439         return search->other_page_flags[page];
 440 }
 441
 442 int
 443 pdf_document_find_get_n_results (EvDocumentFind *document_find)
 444 {
 445         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 446
 447         if (search) {
 448                 return search->current_page_results->len;
 449         } else {
 450                 return 0;
 451         }
 452 }
 453
 454 gboolean
 455 pdf_document_find_get_result (EvDocumentFind *document_find,
 456                               int             n_result,
 457                               GdkRectangle   *rectangle)
 458 {
 459         PdfDocument *pdf_document = PDF_DOCUMENT (document_find);
 460         PdfDocumentSearch *search = pdf_document->search;
 461         GdkRectangle r;
 462
 463         if (search != NULL &&
 464             n_result < search->current_page_results->len) {
 465                 r = g_array_index (search->current_page_results,
 466                                    GdkRectangle, n_result);
 467
 468                 rectangle->x = r.x + pdf_document->page_x_offset;
 469                 rectangle->y = r.y + pdf_document->page_y_offset;
 470                 rectangle->width = r.width;
 471                 rectangle->height = r.height;
 472
 473                 return TRUE;
 474         } else {
 475                 return FALSE;
 476         }
 477 }
 478
 479 static void
 480 pdf_document_search_page_changed (PdfDocumentSearch   *search)
 481 {
 482         PdfDocument *pdf_document = search->document;
 483         int current_page;
 484         GdkRectangle result;
 485         int xMin, yMin, xMax, yMax;
 486
 487         current_page = pdf_document->page;
 488
 489         if (!pdf_document->page_valid) {
 490                 /* we can't do anything until displayPage() */
 491                 search->current_page = -1;
 492                 return;
 493         }
 494
 495         if (search->current_page == current_page)
 496                 return;
 497
 498         /* We need to create current_page_results for the new current page */
 499         g_array_set_size (search->current_page_results, 0);
 500
 501         if (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 502                                          gTrue, gTrue, // startAtTop, stopAtBottom
 503                                          gFalse, gFalse, // startAtLast, stopAtLast
 504                                          &xMin, &yMin, &xMax, &yMax)) {
 505                 result.x = xMin;
 506                 result.y = yMin;
 507                 result.width = xMax - xMin;
 508                 result.height = yMax - yMin;
 509
 510                 g_array_append_val (search->current_page_results, result);
 511                 /* Now find further results */
 512
 513                 while (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 514                                                     gFalse, gTrue,
 515                                                     gTrue, gFalse,
 516                                                     &xMin, &yMin, &xMax, &yMax)) {
 517                         result.x = xMin;
 518                         result.y = yMin;
 519                         result.width = xMax - xMin;
 520                         result.height = yMax - yMin;
 521
 522                         g_array_append_val (search->current_page_results, result);
 523                 }
 524         }
 525 }
 526
 527 static gboolean
 528 pdf_document_search_idle_callback (void *data)
 529 {
 530         PdfDocumentSearch *search = (PdfDocumentSearch*) data;
 531         PdfDocument *pdf_document = search->document;
 532         int n_pages, changed_page;
 533         double xMin, yMin, xMax, yMax;
 534
 535         /* Note that PDF page count is 1 through n_pages INCLUSIVE
 536          * like a real book. We are looking to add one result for each
 537          * page with a match, because the coordinates are meaningless
 538          * with TextOutputDev, so we just want to flag matching pages
 539          * and then when the user switches to the current page, we
 540          * will emit "found" again with the real results.
 541          */
 542         n_pages = ev_document_get_n_pages (EV_DOCUMENT (search->document));
 543
 544         if (search->output_dev == 0) {
 545                 /* First time through here... */
 546                 search->output_dev = new TextOutputDev (NULL, gTrue, gFalse, gFalse);
 547                 if (!search->output_dev->isOk()) {
 548                         goto end_search;
 549                 }
 550         }
 551
 552         pdf_document->doc->displayPage (search->output_dev,
 553                                         search->search_page,
 554                                         72, 72, 0, gTrue, gFalse);
 555
 556         if (search->output_dev->findText (search->ucs4,
 557                                           search->ucs4_len,
 558                                           gTrue, gTrue, // startAtTop, stopAtBottom
 559                                           gFalse, gFalse, // startAtLast, stopAtLast
 560                                           &xMin, &yMin, &xMax, &yMax)) {
 561                 /* This page has results */
 562                 search->other_page_flags[search->search_page] = 1;
 563         } else {
 564                 search->other_page_flags[search->search_page] = 0;
 565         }
 566
 567         changed_page = search->start_page;
 568
 569         search->search_page += 1;
 570         if (search->search_page > n_pages) {
 571                 /* wrap around */
 572                 search->search_page = 1;
 573         }
 574
 575         if (search->search_page != search->start_page) {
 576                 ev_document_find_changed (EV_DOCUMENT_FIND (pdf_document),
 577                                           changed_page);
 578                 return TRUE;
 579         }
 580
 581 end_search:
 582         /* We're done. */
 583         search->idle = 0; /* will return FALSE to remove */
 584         return FALSE;
 585 }
 586
 587 static void
 588 pdf_document_find_begin (EvDocumentFind   *document,
 589                          const char       *search_string,
 590                          gboolean          case_sensitive)
 591 {
 592         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 593         PdfDocumentSearch *search;
 594         int n_pages, i;
 595         gunichar *ucs4;
 596         glong ucs4_len;
 597
 598         /* FIXME handle case_sensitive (right now XPDF
 599          * code is always case insensitive for ASCII
 600          * and case sensitive for all other languaages)
 601          */
 602
 603         g_assert (sizeof (gunichar) == sizeof (Unicode));
 604         ucs4 = g_utf8_to_ucs4_fast (search_string, -1,
 605                                     &ucs4_len);
 606
 607         if (pdf_document->search &&
 608             pdf_document->search->ucs4_len == ucs4_len &&
 609             memcmp (pdf_document->search->ucs4,
 610                     ucs4,
 611                     sizeof (gunichar) * ucs4_len) == 0) {
 612                 /* Search is unchanged */
 613                 g_free (ucs4);
 614                 return;
 615         }
 616
 617         if (pdf_document->search) {
 618                 pdf_document_search_free (pdf_document->search);
 619                 pdf_document->search = NULL;
 620         }
 621
 622         search = g_new0 (PdfDocumentSearch, 1);
 623
 624         search->ucs4 = ucs4;
 625         search->ucs4_len = ucs4_len;
 626
 627         search->current_page_results = g_array_new (FALSE,
 628                                                     FALSE,
 629                                                     sizeof (GdkRectangle));
 630         n_pages = ev_document_get_n_pages (EV_DOCUMENT (document));
 631
 632         search->other_page_flags = g_new0 (int, n_pages + 1);
 633         for (i = 0; i <= n_pages; i++) {
 634                 search->other_page_flags[i] = -1;
 635         }
 636
 637         search->document = pdf_document;
 638
 639         /* We add at low priority so the progress bar repaints */
 640         search->idle = g_idle_add_full (G_PRIORITY_LOW,
 641                                         pdf_document_search_idle_callback,
 642                                         search,
 643                                         NULL);
 644
 645         search->output_dev = 0;
 646
 647         search->start_page = pdf_document->page;
 648         search->search_page = search->start_page;
 649
 650         search->current_page = -1;
 651
 652         pdf_document->search = search;
 653
 654         /* Update for the current page right away */
 655         pdf_document_search_page_changed (search);
 656 }
 657
 658 static void
 659 pdf_document_find_cancel (EvDocumentFind *document)
 660 {
 661         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 662
 663         if (pdf_document->search) {
 664                 pdf_document_search_free (pdf_document->search);
 665                 pdf_document->search = NULL;
 666         }
 667 }
 668
 669 static void
 670 pdf_document_search_free (PdfDocumentSearch   *search)
 671 {
 672         if (search->idle != 0)
 673                 g_source_remove (search->idle);
 674
 675         if (search->output_dev)
 676                 delete search->output_dev;
 677
 678         g_array_free (search->current_page_results, TRUE);
 679         g_free (search->other_page_flags);
 680
 681         g_free (search->ucs4);
 682         g_free (search);
 683 }
 684
 685 static gboolean
 686 pdf_document_has_document_security (EvDocumentSecurity *document_security)
 687 {
 688         /* FIXME: do we really need to have this? */
 689         return FALSE;
 690 }
 691
 692 static void
 693 pdf_document_set_password (EvDocumentSecurity *document_security,
 694                            const char         *password)
 695 {
 696         PdfDocument *document = PDF_DOCUMENT (document_security);
 697
 698         if (document->password)
 699                 g_free (document->password);
 700
 701         document->password = g_strdup (password);
 702 }
 703
 704 static void
 705 pdf_document_ps_export_begin (EvPSExporter *exporter, const char *filename)
 706 {
 707         PdfDocument *document = PDF_DOCUMENT (exporter);
 708
 709         if (document->ps_out)
 710                 delete document->ps_out;
 711
 712         document->ps_out = new PSOutputDev ((char *)filename, document->doc->getXRef(),
 713                                             document->doc->getCatalog(), 1,
 714                                             ev_document_get_n_pages (EV_DOCUMENT (document)),
 715                                             psModePS);
 716 }
 717
 718 static void
 719 pdf_document_ps_export_do_page (EvPSExporter *exporter, int page)
 720 {
 721         PdfDocument *document = PDF_DOCUMENT (exporter);
 722
 723         document->doc->displayPage (document->ps_out, page,
 724                                     72.0, 72.0, 0, gTrue, gFalse);
 725 }
 726
 727 static void
 728 pdf_document_ps_export_end (EvPSExporter *exporter)
 729 {
 730         PdfDocument *document = PDF_DOCUMENT (exporter);
 731
 732         delete document->ps_out;
 733         document->ps_out = NULL;
 734 }
 735
 736
 737 /* EvDocumentLinks Implementation */
 738 typedef struct
 739 {
 740         /* goo GList, not glib */
 741         GList *items;
 742         int index;
 743         int level;
 744 } LinksIter;
 745
 746 static gchar *
 747 unicode_to_char (OutlineItem *outline_item,
 748                  UnicodeMap *uMap)
 749 {
 750         GString gstr;
 751         gchar buf[8]; /* 8 is enough for mapping an unicode char to a string */
 752         int i, n;
 753
 754         for (i = 0; i < outline_item->getTitleLength(); ++i) {
 755                 n = uMap->mapUnicode(outline_item->getTitle()[i], buf, sizeof(buf));
 756                 gstr.append(buf, n);
 757         }
 758
 759         return g_strdup (gstr.getCString ());
 760 }
 761
 762
 763 static gboolean
 764 pdf_document_links_has_document_links (EvDocumentLinks *document_links)
 765 {
 766         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 767         Outline *outline;
 768
 769         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 770
 771         outline = pdf_document->doc->getOutline();
 772         if (outline->getItems() != NULL &&
 773             outline->getItems()->getLength() > 0)
 774                 return TRUE;
 775
 776         return FALSE;
 777 }
 778
 779 static EvDocumentLinksIter *
 780 pdf_document_links_begin_read (EvDocumentLinks *document_links)
 781 {
 782         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 783         Outline *outline;
 784         LinksIter *iter;
 785         GList *items;
 786
 787         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), NULL);
 788
 789         outline = pdf_document->doc->getOutline();
 790         items = outline->getItems();
 791         if (! items)
 792                 return NULL;
 793
 794         iter = g_new0 (LinksIter, 1);
 795         iter->items = items;
 796         iter->index = 0;
 797         iter->level = 0;
 798
 799         return (EvDocumentLinksIter *) iter;
 800 }
 801
 802 static EvLink *
 803 build_link_from_action (PdfDocument *pdf_document,
 804                         LinkAction  *link_action,
 805                         const char  *title)
 806 {
 807         EvLink *link = NULL;
 808
 809         if (link_action == NULL) {
 810                 link = ev_link_new_title (title);
 811         } else if (link_action->getKind () == actionGoToR) {
 812                 g_warning ("actionGoToR links not implemented");
 813         } else if (link_action->getKind () == actionLaunch) {
 814                 g_warning ("actionLaunch links not implemented");
 815         } else if (link_action->getKind () == actionNamed) {
 816                 g_warning ("actionNamed links not implemented");
 817         } else if (link_action->getKind () == actionMovie) {
 818                 g_warning ("actionMovie links not implemented");
 819         } else if (link_action->getKind () == actionGoTo) {
 820                 LinkDest *link_dest;
 821                 LinkGoTo *link_goto;
 822                 Ref page_ref;
 823                 gint page_num = 0;
 824                 GString *named_dest;
 825
 826                 link_goto = dynamic_cast <LinkGoTo *> (link_action);
 827                 link_dest = link_goto->getDest ();
 828                 named_dest = link_goto->getNamedDest ();
 829
 830                 /* Wow!  This seems excessively slow on large
 831                  * documents. I need to investigate more... -jrb */
 832                 if (link_dest != NULL) {
 833                         link_dest = link_dest->copy ();
 834                 } else if (named_dest != NULL) {
 835                         named_dest = named_dest->copy ();
 836                         link_dest = pdf_document->doc->findDest (named_dest);
 837                         delete named_dest;
 838                 }
 839                 if (link_dest != NULL) {
 840                         if (link_dest->isPageRef ()) {
 841                                 page_ref = link_dest->getPageRef ();
 842                                 page_num = pdf_document->doc->findPage (page_ref.num, page_ref.gen);
 843                         } else {
 844                                 page_num = link_dest->getPageNum ();
 845                         }
 846                         delete link_dest;
 847                 }
 848
 849                 link = ev_link_new_page (title, page_num);
 850         } else if (link_action->getKind () == actionURI) {
 851                 LinkURI *link_uri;
 852
 853                 link_uri = dynamic_cast <LinkURI *> (link_action);
 854                 link = ev_link_new_external
 855                         (title, link_uri->getURI()->getCString());
 856         } else if (link_action->getKind () == actionUnknown) {
 857                 LinkUnknown *link_unknown;
 858
 859                 link_unknown = dynamic_cast <LinkUnknown *> (link_action);
 860
 861                 g_warning ("Unknown link type %s",
 862                            link_unknown->getAction()->getCString());
 863         }
 864
 865         return link;
 866 }
 867
 868 /* FIXME This returns a new object every time, probably we should cache it
 869    in the iter */
 870 static EvLink *
 871 pdf_document_links_get_link (EvDocumentLinks      *document_links,
 872                              EvDocumentLinksIter  *links_iter)
 873 {
 874         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 875         LinksIter *iter = (LinksIter *)links_iter;
 876         OutlineItem *anItem;
 877         LinkAction *link_action;
 878         Unicode *link_title;
 879         const char *title;
 880
 881         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 882         g_return_val_if_fail (iter != NULL, FALSE);
 883
 884         anItem = (OutlineItem *)iter->items->get(iter->index);
 885         link_action = anItem->getAction ();
 886         link_title = anItem->getTitle ();
 887         title = unicode_to_char (anItem, pdf_document->umap);
 888
 889         return build_link_from_action (pdf_document, link_action, title);
 890 }
 891
 892 static EvDocumentLinksIter *
 893 pdf_document_links_get_child (EvDocumentLinks     *document_links,
 894                               EvDocumentLinksIter *links_iter)
 895 {
 896         LinksIter *iter = (LinksIter *)links_iter;
 897         LinksIter *child_iter;
 898         OutlineItem *anItem;
 899
 900         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 901
 902         anItem = (OutlineItem *)iter->items->get(iter->index);
 903         anItem->open ();
 904         if (! (anItem->hasKids() && anItem->getKids()) )
 905                 return NULL;
 906
 907         child_iter = g_new0 (LinksIter, 1);
 908         child_iter->index = 0;
 909         child_iter->level = iter->level + 1;
 910         child_iter->items = anItem->getKids ();
 911         g_assert (child_iter->items);
 912
 913         return (EvDocumentLinksIter *) child_iter;
 914 }
 915
 916 static gboolean
 917 pdf_document_links_next (EvDocumentLinks     *document_links,
 918                          EvDocumentLinksIter *links_iter)
 919 {
 920         LinksIter *iter = (LinksIter *) links_iter;
 921
 922         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 923
 924         iter->index++;
 925         if (iter->index >= iter->items->getLength())
 926                 return FALSE;
 927
 928         return TRUE;
 929 }
 930
 931 static void
 932 pdf_document_links_free_iter (EvDocumentLinks     *document_links,
 933                               EvDocumentLinksIter *iter)
 934 {
 935         g_return_if_fail (PDF_IS_DOCUMENT (document_links));
 936         g_return_if_fail (iter != NULL);
 937
 938         /* FIXME: Should I close all the nodes?? Free them? */
 939         g_free (iter);
 940 }
 941
 942 static void
 943 pdf_document_finalize (GObject *object)
 944 {
 945         PdfDocument *pdf_document = PDF_DOCUMENT (object);
 946
 947         if (pdf_document->links) {
 948                 delete pdf_document->links;
 949         }
 950
 951         if (pdf_document->umap) {
 952                 pdf_document->umap->decRefCnt ();
 953                 pdf_document->umap = NULL;
 954         }
 955
 956         if (pdf_document->search)
 957                 pdf_document_search_free (pdf_document->search);
 958
 959         if (pdf_document->target)
 960                 g_object_unref (pdf_document->target);
 961
 962         if (pdf_document->out)
 963                 delete pdf_document->out;
 964         if (pdf_document->ps_out)
 965                 delete pdf_document->ps_out;
 966         if (pdf_document->doc)
 967                 delete pdf_document->doc;
 968
 969 }
 970
 971 static void
 972 pdf_document_set_property (GObject *object,
 973                            guint prop_id,
 974                            const GValue *value,
 975                            GParamSpec *pspec)
 976 {
 977         switch (prop_id)
 978
 979         {
 980                 case PROP_TITLE:
 981                         /* read only */
 982                         break;
 983         }
 984 }
 985
 986 static gboolean
 987 has_unicode_marker (GString *string)
 988 {
 989         return ((string->getChar (0) & 0xff) == 0xfe &&
 990                 (string->getChar (1) & 0xff) == 0xff);
 991 }
 992
 993 static gchar *
 994 pdf_info_dict_get_string (Dict *info_dict, const gchar *key) {
 995         Object obj;
 996         GString *value;
 997         gchar *result;
 998
 999         g_return_val_if_fail (info_dict != NULL, NULL);
1000         g_return_val_if_fail (key != NULL, NULL);
1001
1002         if (!info_dict->lookup ((gchar *)key, &obj)->isString ()) {
1003                 obj.free ();
1004                 return NULL;
1005         }
1006
1007         value = obj.getString ();
1008
1009         if (has_unicode_marker (value)) {
1010                 result = g_convert (value->getCString () + 2,
1011                                     value->getLength () - 2,
1012                                     "UTF-8", "UTF-16BE", NULL, NULL, NULL);
1013         } else {
1014                 result = g_strndup (value->getCString (), value->getLength ());
1015         }
1016
1017         obj.free ();
1018
1019         return result;
1020 }
1021
1022 static char *
1023 pdf_document_get_title (PdfDocument *pdf_document)
1024 {
1025         char *title = NULL;
1026         Object info;
1027
1028         if (pdf_document->doc == NULL)
1029                 return NULL;
1030         pdf_document->doc->getDocInfo (&info);
1031
1032         if (info.isDict ()) {
1033                 title = pdf_info_dict_get_string (info.getDict(), "Title");
1034         }
1035
1036         return title;
1037 }
1038
1039 static char *
1040 pdf_document_get_text (EvDocument *document, GdkRectangle *rect)
1041 {
1042         PdfDocument *pdf_document = PDF_DOCUMENT (document);
1043         GString *sel_text = new GString;
1044         const char *text;
1045         int x1, y1, x2, y2;
1046
1047         x1 = rect->x - pdf_document->page_x_offset;
1048         y1 = rect->y - pdf_document->page_y_offset;
1049         x2 = x1 + rect->width;
1050         y2 = y1 + rect->height;
1051
1052         sel_text = pdf_document->out->getText (x1, y1, x2, y2);
1053         text = sel_text->getCString ();
1054
1055         return text ? g_strdup (text) : NULL;
1056 }
1057
1058 static EvLink *
1059 pdf_document_get_link (EvDocument *document, int x, int y)
1060 {
1061         PdfDocument *pdf_document = PDF_DOCUMENT (document);
1062         LinkAction *action;
1063         double link_x, link_y;
1064
1065         if (pdf_document->links == NULL) {
1066                 return NULL;
1067         }
1068
1069         /* Offset */
1070         link_x = x - pdf_document->page_x_offset;
1071         link_y = y - pdf_document->page_y_offset;
1072
1073         /* Inverse y */
1074         link_y = pdf_document->out->getBitmapHeight() - link_y;
1075
1076         /* Zoom */
1077         link_x = link_x / pdf_document->scale;
1078         link_y = link_y / pdf_document->scale;
1079
1080         action = pdf_document->links->find (link_x, link_y);
1081
1082         if (action) {
1083                 return build_link_from_action (pdf_document, action, "");
1084         } else {
1085                 return NULL;
1086         }
1087 }
1088
1089 static void
1090 pdf_document_get_property (GObject *object,
1091                            guint prop_id,
1092                            GValue *value,
1093                            GParamSpec *pspec)
1094 {
1095         PdfDocument *pdf_document = PDF_DOCUMENT (object);
1096         char *title;
1097
1098         switch (prop_id)
1099         {
1100                 case PROP_TITLE:
1101                         title = pdf_document_get_title (pdf_document);
1102                         g_value_set_string (value, title);
1103                         g_free (title);
1104                         break;
1105         }
1106 }
1107
1108 static void
1109 pdf_document_class_init (PdfDocumentClass *klass)
1110 {
1111         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1112
1113         gobject_class->finalize = pdf_document_finalize;
1114         gobject_class->get_property = pdf_document_get_property;
1115         gobject_class->set_property = pdf_document_set_property;
1116
1117         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
1118 }
1119
1120 static void
1121 pdf_document_document_iface_init (EvDocumentIface *iface)
1122 {
1123         iface->load = pdf_document_load;
1124         iface->save = pdf_document_save;
1125         iface->get_text = pdf_document_get_text;
1126         iface->get_link = pdf_document_get_link;
1127         iface->get_n_pages = pdf_document_get_n_pages;
1128         iface->set_page = pdf_document_set_page;
1129         iface->get_page = pdf_document_get_page;
1130         iface->set_scale = pdf_document_set_scale;
1131         iface->set_target = pdf_document_set_target;
1132         iface->set_page_offset = pdf_document_set_page_offset;
1133         iface->get_page_size = pdf_document_get_page_size;
1134         iface->render = pdf_document_render;
1135 }
1136
1137 static void
1138 pdf_document_ps_exporter_iface_init (EvPSExporterIface *iface)
1139 {
1140         iface->begin = pdf_document_ps_export_begin;
1141         iface->do_page = pdf_document_ps_export_do_page;
1142         iface->end = pdf_document_ps_export_end;
1143 }
1144
1145
1146 static void
1147 pdf_document_find_iface_init (EvDocumentFindIface *iface)
1148 {
1149         iface->begin = pdf_document_find_begin;
1150         iface->get_n_results = pdf_document_find_get_n_results;
1151         iface->get_result = pdf_document_find_get_result;
1152         iface->page_has_results = pdf_document_find_page_has_results;
1153         iface->get_progress = pdf_document_find_get_progress;
1154         iface->cancel = pdf_document_find_cancel;
1155 }
1156
1157 static void
1158 pdf_document_security_iface_init (EvDocumentSecurityIface *iface)
1159 {
1160         iface->has_document_security = pdf_document_has_document_security;
1161         iface->set_password = pdf_document_set_password;
1162 }
1163
1164 static void
1165 pdf_document_document_links_iface_init (EvDocumentLinksIface *iface)
1166 {
1167         iface->has_document_links = pdf_document_links_has_document_links;
1168         iface->begin_read = pdf_document_links_begin_read;
1169         iface->get_link = pdf_document_links_get_link;
1170         iface->get_child = pdf_document_links_get_child;
1171         iface->next = pdf_document_links_next;
1172         iface->free_iter = pdf_document_links_free_iter;
1173 }
1174
1175 /* Thumbnails */
1176
1177 static GdkPixbuf *
1178 bitmap_to_pixbuf (SplashBitmap *bitmap,
1179                   GdkPixbuf    *target,
1180                   gint          x_offset,
1181                   gint          y_offset)
1182 {
1183         gint width;
1184         gint height;
1185         SplashColorPtr dataPtr;
1186         int x, y;
1187
1188         gboolean target_has_alpha;
1189         gint target_rowstride;
1190         guchar *target_data;
1191
1192         width = bitmap->getWidth ();
1193         height = bitmap->getHeight ();
1194
1195         if (width + x_offset > gdk_pixbuf_get_width (target))
1196                 width = gdk_pixbuf_get_width (target) - x_offset;
1197         if (height + y_offset > gdk_pixbuf_get_height (target))
1198                 height = gdk_pixbuf_get_height (target) - x_offset;
1199
1200         target_has_alpha = gdk_pixbuf_get_has_alpha (target);
1201         target_rowstride = gdk_pixbuf_get_rowstride (target);
1202         target_data = gdk_pixbuf_get_pixels (target);
1203
1204         dataPtr = bitmap->getDataPtr ();
1205
1206         for (y = 0; y < height; y++) {
1207                 SplashRGB8 *p;
1208                 SplashRGB8 rgb;
1209                 guchar *q;
1210
1211                 p = dataPtr.rgb8 + y * width;
1212                 q = target_data + ((y + y_offset) * target_rowstride +
1213                                    x_offset * (target_has_alpha?4:3));
1214                 for (x = 0; x < width; x++) {
1215                         rgb = *p++;
1216
1217                         *q++ = splashRGB8R (rgb);
1218                         *q++ = splashRGB8G (rgb);
1219                         *q++ = splashRGB8B (rgb);
1220
1221                         if (target_has_alpha)
1222                                 q++;
1223                 }
1224         }
1225
1226         return target;
1227 }
1228
1229
1230 static GdkPixbuf *
1231 pdf_document_thumbnails_get_page_pixbuf (PdfDocument *pdf_document,
1232                                          gdouble      scale_factor,
1233                                          gint         page_num,
1234                                          gint         width,
1235                                          gint         height)
1236 {
1237         SplashOutputDev *output;
1238         GdkPixbuf *pixbuf;
1239         SplashColor color;
1240
1241         color.rgb8 = splashMakeRGB8 (255, 255, 255);
1242
1243         output = new SplashOutputDev (splashModeRGB8, gFalse, color);
1244         output->startDoc (pdf_document->doc->getXRef());
1245         pdf_document->doc->displayPage (output,
1246                                         page_num + 1,
1247                                         72*scale_factor,
1248                                         72*scale_factor,
1249                                         0, gTrue, gFalse);
1250
1251         pixbuf = ev_document_misc_get_thumbnail_frame (output->getBitmap()->getWidth(),
1252                                                        output->getBitmap()->getHeight(),
1253                                                        NULL);
1254         bitmap_to_pixbuf (output->getBitmap(), pixbuf, 1, 1);
1255         delete output;
1256
1257         return pixbuf;
1258 }
1259
1260 static void
1261 pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnails,
1262                                         gint                  page,
1263                                         gint                  suggested_width,
1264                                         gint                 *width,
1265                                         gint                 *height)
1266 {
1267         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1268         Page *the_page;
1269         Object the_thumb;
1270         Thumb *thumb = NULL;
1271         gdouble page_ratio;
1272
1273         the_page = pdf_document->doc->getCatalog ()->getPage (page);
1274         the_page->getThumb (&the_thumb);
1275
1276         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1277                 /* Build the thumbnail object */
1278                 thumb = new Thumb(pdf_document->doc->getXRef (),
1279                                   &the_thumb);
1280
1281                 *width = thumb->getWidth ();
1282                 *height = thumb->getHeight ();
1283         } else {
1284                 page_ratio = the_page->getHeight () / the_page->getWidth ();
1285                 *width = suggested_width;
1286                 *height = (gint) (suggested_width * page_ratio);
1287         }
1288 }
1289
1290 static GdkPixbuf *
1291 pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
1292                                        gint                  page,
1293                                        gint                  width)
1294 {
1295         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1296         GdkPixbuf *thumbnail;
1297         Page *the_page;
1298         Object the_thumb;
1299         Thumb *thumb = NULL;
1300         gboolean have_ethumbs = FALSE;
1301         gdouble page_ratio;
1302         gint dest_height;
1303
1304         /* getPage seems to want page + 1 for some reason; */
1305         the_page = pdf_document->doc->getCatalog ()->getPage (page + 1);
1306         the_page->getThumb(&the_thumb);
1307
1308         page_ratio = the_page->getHeight () / the_page->getWidth ();
1309         dest_height = (gint) (width * page_ratio);
1310
1311
1312         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1313                 /* Build the thumbnail object */
1314                 thumb = new Thumb(pdf_document->doc->getXRef (),
1315                                   &the_thumb);
1316
1317                 have_ethumbs = thumb->ok();
1318         }
1319
1320         if (have_ethumbs) {
1321                 guchar *data;
1322                 GdkPixbuf *tmp_pixbuf;
1323
1324                 data = thumb->getPixbufData();
1325                 tmp_pixbuf = gdk_pixbuf_new_from_data (data,
1326                                                        GDK_COLORSPACE_RGB,
1327                                                        FALSE,
1328                                                        8,
1329                                                        thumb->getWidth (),
1330                                                        thumb->getHeight (),
1331                                                        thumb->getWidth () * 3,
1332                                                        NULL, NULL);
1333                 /* FIXME: do we want to check that the thumb's size isn't ridiculous?? */
1334                 thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
1335                 g_object_unref (tmp_pixbuf);
1336         } else {
1337                 gdouble scale_factor;
1338
1339                 scale_factor = (gdouble)width / the_page->getWidth ();
1340
1341                 thumbnail = pdf_document_thumbnails_get_page_pixbuf (pdf_document,
1342                                                                      scale_factor,
1343                                                                      page,
1344                                                                      width,
1345                                                                      dest_height);
1346         }
1347
1348         return thumbnail;
1349 }
1350 static void
1351 pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
1352 {
1353         iface->get_thumbnail = pdf_document_thumbnails_get_thumbnail;
1354         iface->get_dimensions = pdf_document_thumbnails_get_dimensions;
1355 }
1356
1357
1358 static void
1359 pdf_document_init (PdfDocument *pdf_document)
1360 {
1361         pdf_document->page = 1;
1362         pdf_document->page_x_offset = 0;
1363         pdf_document->page_y_offset = 0;
1364         pdf_document->scale = 1.;
1365
1366         pdf_document->page_valid = FALSE;
1367         pdf_document->password = NULL;
1368 }
1369