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