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