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