pdf/xpdf/pdf-document.cc

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* pdfdocument.h: Implementation of EvDocument for PDF
   3  * Copyright (C) 2004, Red Hat, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <glib/gi18n.h>
  21
  22 #include "gpdf-g-switch.h"
  23 #include "pdf-document.h"
  24 #include "ev-ps-exporter.h"
  25 #include "ev-document-find.h"
  26 #include "ev-document-misc.h"
  27 #include "gpdf-g-switch.h"
  28 #include "ev-document-links.h"
  29 #include "ev-document-security.h"
  30 #include "ev-document-thumbnails.h"
  31
  32 #include "GlobalParams.h"
  33 #include "GDKSplashOutputDev.h"
  34 #include "SplashBitmap.h"
  35 #include "PDFDoc.h"
  36 #include "Outline.h"
  37 #include "ErrorCodes.h"
  38 #include "UnicodeMap.h"
  39 #include "GlobalParams.h"
  40 #include "GfxState.h"
  41 #include "Thumb.h"
  42 #include "goo/GList.h"
  43 #include "PSOutputDev.h"
  44
  45 enum {
  46         PROP_0,
  47         PROP_TITLE
  48 };
  49
  50 typedef struct
  51 {
  52         PdfDocument *document;
  53         gunichar *ucs4;
  54         glong ucs4_len;
  55         guint idle;
  56         /* full results are only possible for the rendered current page */
  57         int current_page;
  58         GArray *current_page_results;
  59         int *other_page_flags; /* length n_pages + 1, first element ignored */
  60         int start_page;   /* skip this one as we iterate, since we did it first */
  61         int search_page;  /* the page we're searching now */
  62         TextOutputDev *output_dev;
  63 } PdfDocumentSearch;
  64
  65 typedef struct _PdfDocumentClass PdfDocumentClass;
  66
  67 #define PDF_DOCUMENT_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), PDF_TYPE_DOCUMENT, PdfDocumentClass))
  68 #define PDF_IS_DOCUMENT_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), PDF_TYPE_DOCUMENT))
  69 #define PDF_DOCUMENT_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), PDF_TYPE_DOCUMENT, PdfDocumentClass))
  70
  71 struct _PdfDocumentClass
  72 {
  73         GObjectClass parent_class;
  74 };
  75
  76 struct _PdfDocument
  77 {
  78         GObject parent_instance;
  79
  80         int page;
  81         int page_x_offset;
  82         int page_y_offset;
  83         double scale;
  84         GdkDrawable *target;
  85
  86         GDKSplashOutputDev *out;
  87         PSOutputDev *ps_out;
  88         PDFDoc *doc;
  89         Links *links;
  90         UnicodeMap *umap;
  91
  92         gchar *password;
  93
  94         PdfDocumentSearch *search;
  95 };
  96
  97 static void pdf_document_document_links_iface_init      (EvDocumentLinksIface      *iface);
  98 static void pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
  99 static void pdf_document_document_iface_init            (EvDocumentIface           *iface);
 100 static void pdf_document_ps_exporter_iface_init         (EvPSExporterIface         *iface);
 101 static void pdf_document_find_iface_init                (EvDocumentFindIface       *iface);
 102 static void pdf_document_security_iface_init            (EvDocumentSecurityIface   *iface);
 103 static void pdf_document_search_free                    (PdfDocumentSearch         *search);
 104 static void pdf_document_search_page_changed            (PdfDocumentSearch         *search);
 105
 106
 107 G_DEFINE_TYPE_WITH_CODE (PdfDocument, pdf_document, G_TYPE_OBJECT,
 108                          {
 109                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
 110                                                         pdf_document_document_iface_init);
 111                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS,
 112                                                         pdf_document_document_links_iface_init);
 113                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
 114                                                         pdf_document_document_thumbnails_iface_init);
 115                                  G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
 116                                                         pdf_document_ps_exporter_iface_init);
 117                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND,
 118                                                         pdf_document_find_iface_init);
 119                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_SECURITY,
 120                                                         pdf_document_security_iface_init);
 121                          });
 122
 123 static void
 124 document_init_links (PdfDocument *pdf_document)
 125 {
 126         Page *page;
 127         Object obj;
 128
 129         if (pdf_document->links) {
 130                 delete pdf_document->links;
 131         }
 132         page = pdf_document->doc->getCatalog ()->getPage (pdf_document->page);
 133         pdf_document->links = new Links (page->getAnnots (&obj),
 134                                          pdf_document->doc->getCatalog ()->getBaseURI ());
 135         obj.free ();
 136 }
 137
 138 static void
 139 document_display_page (PdfDocument *pdf_document)
 140 {
 141         if (pdf_document->out != NULL) {
 142                 pdf_document->doc->displayPage (pdf_document->out, pdf_document->page,
 143                                                 72 * pdf_document->scale,
 144                                                 72 * pdf_document->scale,
 145                                                 0, gTrue, gTrue);
 146
 147                 document_init_links (pdf_document);
 148
 149                 /* Update the search results available to the app since
 150                  * we only provide full results on the current page
 151                  */
 152                 if (pdf_document->search)
 153                         pdf_document_search_page_changed (pdf_document->search);
 154         }
 155 }
 156
 157 static gboolean
 158 pdf_document_load (EvDocument  *document,
 159                    const char  *uri,
 160                    GError     **error)
 161 {
 162         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 163         PDFDoc *newDoc;
 164         int err;
 165         char *filename;
 166         GString *filename_g;
 167         GString *enc;
 168
 169         if (!globalParams) {
 170                 globalParams = new GlobalParams("/etc/xpdfrc");
 171                 globalParams->setupBaseFontsFc(NULL);
 172         }
 173
 174         if (! pdf_document->umap) {
 175                 enc = new GString("UTF-8");
 176                 pdf_document->umap = globalParams->getUnicodeMap(enc);
 177                 pdf_document->umap->incRefCnt ();
 178                 delete enc;
 179         }
 180
 181         filename = g_filename_from_uri (uri, NULL, error);
 182         if (!filename)
 183                 return FALSE;
 184
 185         filename_g = new GString (filename);
 186         g_free (filename);
 187
 188         // open the PDF file, assumes ownership of filename_g
 189         GString *password = NULL;
 190         if (pdf_document->password)
 191                 password = new GString (pdf_document->password);
 192         newDoc = new PDFDoc(filename_g, password, password);
 193         if (password)
 194                 delete password;
 195
 196         if (!newDoc->isOk()) {
 197                 err = newDoc->getErrorCode();
 198                 delete newDoc;
 199                 if (err == errEncrypted) {
 200                         g_set_error (error, EV_DOCUMENT_ERROR,
 201                                      EV_DOCUMENT_ERROR_ENCRYPTED,
 202                                      "Document is encrypted.");
 203                 } else {
 204                         g_set_error (error, G_FILE_ERROR,
 205                                      G_FILE_ERROR_FAILED,
 206                                      "Failed to load document (error %d) '%s'\n",
 207                                      err,
 208                                      uri);
 209                 }
 210
 211                 return FALSE;
 212         }
 213
 214         if (pdf_document->doc)
 215                 delete pdf_document->doc;
 216         pdf_document->doc = newDoc;
 217
 218         pdf_document->page = 1;
 219
 220         if (pdf_document->out)
 221                 pdf_document->out->startDoc(pdf_document->doc->getXRef());
 222
 223         g_object_notify (G_OBJECT (pdf_document), "title");
 224
 225         return TRUE;
 226 }
 227
 228 static gboolean
 229 pdf_document_save (EvDocument  *document,
 230                    const char  *uri,
 231                    GError     **error)
 232 {
 233         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 234         char *filename;
 235         gboolean retval = FALSE;
 236
 237         filename = g_filename_from_uri (uri, NULL, error);
 238         if (filename != NULL) {
 239                 GString *fname = new GString (filename);
 240
 241                 retval = pdf_document->doc->saveAs (fname);
 242         }
 243
 244         return retval;
 245 }
 246
 247 static int
 248 pdf_document_get_n_pages (EvDocument  *document)
 249 {
 250         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 251
 252         if (pdf_document->doc)
 253                 return pdf_document->doc->getNumPages();
 254         else
 255                 return 1;
 256 }
 257
 258 static void
 259 pdf_document_set_page (EvDocument  *document,
 260                        int          page)
 261 {
 262         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 263
 264         page = CLAMP (page, 1, ev_document_get_n_pages (document));
 265
 266         if (page != pdf_document->page) {
 267                 pdf_document->page = page;
 268                 document_display_page (pdf_document);
 269                 ev_document_page_changed (EV_DOCUMENT (pdf_document));
 270         }
 271 }
 272
 273 static int
 274 pdf_document_get_page (EvDocument  *document)
 275 {
 276         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 277
 278         return pdf_document->page;
 279 }
 280
 281 static void
 282 redraw_callback (void *data)
 283 {
 284         /* Need to hook up through a EvDocument callback? */
 285 }
 286
 287 static void
 288 pdf_document_set_target (EvDocument  *document,
 289                          GdkDrawable *target)
 290 {
 291         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 292
 293         if (pdf_document->target != target) {
 294                 if (pdf_document->target)
 295                         g_object_unref (pdf_document->target);
 296
 297                 pdf_document->target = target;
 298
 299                 if (pdf_document->target)
 300                         g_object_ref (pdf_document->target);
 301
 302                 if (pdf_document->out) {
 303                         delete pdf_document->out;
 304                         pdf_document->out = NULL;
 305                 }
 306
 307                 if (pdf_document->target) {
 308                         pdf_document->out = new GDKSplashOutputDev (gdk_drawable_get_screen (pdf_document->target),
 309                                                          redraw_callback, (void*) document);
 310
 311                         if (pdf_document->doc)
 312                                 pdf_document->out->startDoc(pdf_document->doc->getXRef());
 313
 314                         document_display_page (pdf_document);
 315                 }
 316         }
 317 }
 318
 319 static void
 320 pdf_document_set_scale (EvDocument  *document,
 321                         double       scale)
 322 {
 323         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 324
 325         if (pdf_document->scale != scale) {
 326                 pdf_document->scale = scale;
 327                 document_display_page (pdf_document);
 328                 ev_document_scale_changed (EV_DOCUMENT (pdf_document));
 329         }
 330 }
 331
 332 static void
 333 pdf_document_set_page_offset (EvDocument  *document,
 334                               int          x,
 335                               int          y)
 336 {
 337         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 338
 339         pdf_document->page_x_offset = x;
 340         pdf_document->page_y_offset = y;
 341 }
 342
 343 static void
 344 pdf_document_get_page_size (EvDocument   *document,
 345                             int           page,
 346                             int          *width,
 347                             int          *height)
 348 {
 349         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 350         Page *the_page;
 351
 352         /* set some default values */
 353         if (width)
 354                 *width = 1;
 355         if (height)
 356                 *height = 1;
 357
 358         if (page == -1)
 359                 page = pdf_document->page;
 360
 361         the_page = pdf_document->doc->getCatalog ()->getPage (page);
 362         if (the_page) {
 363                 *width = (int) ((the_page->getWidth () * pdf_document->scale) + 0.5);
 364                 *height = (int) ((the_page->getHeight () * pdf_document->scale) + 0.5);
 365         }
 366 }
 367
 368 static void
 369 pdf_document_render (EvDocument  *document,
 370                      int          clip_x,
 371                      int          clip_y,
 372                      int          clip_width,
 373                      int          clip_height)
 374 {
 375         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 376         GdkRectangle page;
 377         GdkRectangle draw;
 378
 379         if (!pdf_document->target)
 380                 return;
 381
 382         page.x = pdf_document->page_x_offset;
 383         page.y = pdf_document->page_y_offset;
 384         page.width = pdf_document->out->getBitmapWidth();
 385         page.height = pdf_document->out->getBitmapHeight();
 386
 387         draw.x = clip_x;
 388         draw.y = clip_y;
 389         draw.width = clip_width;
 390         draw.height = clip_height;
 391
 392         if (gdk_rectangle_intersect (&page, &draw, &draw))
 393                 pdf_document->out->redraw (draw.x - page.x, draw.y - page.y,
 394                                            pdf_document->target,
 395                                            draw.x, draw.y,
 396                                            draw.width, draw.height);
 397 }
 398
 399 double
 400 pdf_document_find_get_progress (EvDocumentFind *document_find)
 401 {
 402         PdfDocumentSearch *search;
 403         int n_pages, pages_done;
 404
 405         search = PDF_DOCUMENT (document_find)->search;
 406
 407         if (search == NULL) {
 408                 return 0;
 409         }
 410
 411         n_pages = ev_document_get_n_pages (EV_DOCUMENT (document_find));
 412         if (search->search_page > search->start_page) {
 413                 pages_done = search->search_page - search->start_page + 1;
 414         } else if (search->search_page == search->start_page) {
 415                 pages_done = n_pages;
 416         } else {
 417                 pages_done = n_pages - search->start_page + search->search_page;
 418         }
 419
 420         return pages_done / (double) n_pages;
 421 }
 422
 423 int
 424 pdf_document_find_page_has_results (EvDocumentFind *document_find,
 425                                     int             page)
 426 {
 427         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 428
 429         g_return_val_if_fail (search != NULL, FALSE);
 430
 431         return search->other_page_flags[page];
 432 }
 433
 434 int
 435 pdf_document_find_get_n_results (EvDocumentFind *document_find)
 436 {
 437         PdfDocumentSearch *search = PDF_DOCUMENT (document_find)->search;
 438
 439         if (search) {
 440                 return search->current_page_results->len;
 441         } else {
 442                 return 0;
 443         }
 444 }
 445
 446 gboolean
 447 pdf_document_find_get_result (EvDocumentFind *document_find,
 448                               int             n_result,
 449                               GdkRectangle   *rectangle)
 450 {
 451         PdfDocument *pdf_document = PDF_DOCUMENT (document_find);
 452         PdfDocumentSearch *search = pdf_document->search;
 453         GdkRectangle r;
 454
 455         if (search != NULL &&
 456             n_result < search->current_page_results->len) {
 457                 r = g_array_index (search->current_page_results,
 458                                    GdkRectangle, n_result);
 459
 460                 rectangle->x = r.x + pdf_document->page_x_offset;
 461                 rectangle->y = r.y + pdf_document->page_y_offset;
 462                 rectangle->width = r.width;
 463                 rectangle->height = r.height;
 464
 465                 return TRUE;
 466         } else {
 467                 return FALSE;
 468         }
 469 }
 470
 471 static void
 472 pdf_document_search_page_changed (PdfDocumentSearch   *search)
 473 {
 474         PdfDocument *pdf_document = search->document;
 475         int current_page;
 476         GdkRectangle result;
 477         int xMin, yMin, xMax, yMax;
 478
 479         current_page = pdf_document->page;
 480
 481         if (search->current_page == current_page)
 482                 return;
 483
 484         /* We need to create current_page_results for the new current page */
 485         g_array_set_size (search->current_page_results, 0);
 486
 487         if (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 488                                          gTrue, gTrue, // startAtTop, stopAtBottom
 489                                          gFalse, gFalse, // startAtLast, stopAtLast
 490                                          &xMin, &yMin, &xMax, &yMax)) {
 491                 result.x = xMin;
 492                 result.y = yMin;
 493                 result.width = xMax - xMin;
 494                 result.height = yMax - yMin;
 495
 496                 g_array_append_val (search->current_page_results, result);
 497                 /* Now find further results */
 498
 499                 while (pdf_document->out->findText (search->ucs4, search->ucs4_len,
 500                                                     gFalse, gTrue,
 501                                                     gTrue, gFalse,
 502                                                     &xMin, &yMin, &xMax, &yMax)) {
 503                         result.x = xMin;
 504                         result.y = yMin;
 505                         result.width = xMax - xMin;
 506                         result.height = yMax - yMin;
 507
 508                         g_array_append_val (search->current_page_results, result);
 509                 }
 510         }
 511 }
 512
 513 static gboolean
 514 pdf_document_search_idle_callback (void *data)
 515 {
 516         PdfDocumentSearch *search = (PdfDocumentSearch*) data;
 517         PdfDocument *pdf_document = search->document;
 518         int n_pages, changed_page;
 519         double xMin, yMin, xMax, yMax;
 520
 521         /* Note that PDF page count is 1 through n_pages INCLUSIVE
 522          * like a real book. We are looking to add one result for each
 523          * page with a match, because the coordinates are meaningless
 524          * with TextOutputDev, so we just want to flag matching pages
 525          * and then when the user switches to the current page, we
 526          * will emit "found" again with the real results.
 527          */
 528         n_pages = ev_document_get_n_pages (EV_DOCUMENT (search->document));
 529
 530         if (search->output_dev == 0) {
 531                 /* First time through here... */
 532                 search->output_dev = new TextOutputDev (NULL, gTrue, gFalse, gFalse);
 533                 if (!search->output_dev->isOk()) {
 534                         goto end_search;
 535                 }
 536         }
 537
 538         pdf_document->doc->displayPage (search->output_dev,
 539                                         search->search_page,
 540                                         72, 72, 0, gTrue, gFalse);
 541
 542         if (search->output_dev->findText (search->ucs4,
 543                                           search->ucs4_len,
 544                                           gTrue, gTrue, // startAtTop, stopAtBottom
 545                                           gFalse, gFalse, // startAtLast, stopAtLast
 546                                           &xMin, &yMin, &xMax, &yMax)) {
 547                 /* This page has results */
 548                 search->other_page_flags[search->search_page] = 1;
 549         } else {
 550                 search->other_page_flags[search->search_page] = 0;
 551         }
 552
 553         changed_page = search->start_page;
 554
 555         search->search_page += 1;
 556         if (search->search_page > n_pages) {
 557                 /* wrap around */
 558                 search->search_page = 1;
 559         }
 560
 561         if (search->search_page != search->start_page) {
 562                 ev_document_find_changed (EV_DOCUMENT_FIND (pdf_document),
 563                                           changed_page);
 564                 return TRUE;
 565         }
 566
 567 end_search:
 568         /* We're done. */
 569         search->idle = 0; /* will return FALSE to remove */
 570         return FALSE;
 571 }
 572
 573 static void
 574 pdf_document_find_begin (EvDocumentFind   *document,
 575                          const char       *search_string,
 576                          gboolean          case_sensitive)
 577 {
 578         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 579         PdfDocumentSearch *search;
 580         int n_pages, i;
 581         gunichar *ucs4;
 582         glong ucs4_len;
 583
 584         /* FIXME handle case_sensitive (right now XPDF
 585          * code is always case insensitive for ASCII
 586          * and case sensitive for all other languaages)
 587          */
 588
 589         g_assert (sizeof (gunichar) == sizeof (Unicode));
 590         ucs4 = g_utf8_to_ucs4_fast (search_string, -1,
 591                                     &ucs4_len);
 592
 593         if (pdf_document->search &&
 594             pdf_document->search->ucs4_len == ucs4_len &&
 595             memcmp (pdf_document->search->ucs4,
 596                     ucs4,
 597                     sizeof (gunichar) * ucs4_len) == 0) {
 598                 /* Search is unchanged */
 599                 g_free (ucs4);
 600                 return;
 601         }
 602
 603         if (pdf_document->search) {
 604                 pdf_document_search_free (pdf_document->search);
 605                 pdf_document->search = NULL;
 606         }
 607
 608         search = g_new0 (PdfDocumentSearch, 1);
 609
 610         search->ucs4 = ucs4;
 611         search->ucs4_len = ucs4_len;
 612
 613         search->current_page_results = g_array_new (FALSE,
 614                                                     FALSE,
 615                                                     sizeof (GdkRectangle));
 616         n_pages = ev_document_get_n_pages (EV_DOCUMENT (document));
 617
 618         search->other_page_flags = g_new0 (int, n_pages + 1);
 619         for (i = 0; i <= n_pages; i++) {
 620                 search->other_page_flags[i] = -1;
 621         }
 622
 623         search->document = pdf_document;
 624
 625         /* We add at low priority so the progress bar repaints */
 626         search->idle = g_idle_add_full (G_PRIORITY_LOW,
 627                                         pdf_document_search_idle_callback,
 628                                         search,
 629                                         NULL);
 630
 631         search->output_dev = 0;
 632
 633         search->start_page = pdf_document->page;
 634         search->search_page = search->start_page;
 635
 636         search->current_page = -1;
 637
 638         pdf_document->search = search;
 639
 640         /* Update for the current page right away */
 641         pdf_document_search_page_changed (search);
 642 }
 643
 644 static void
 645 pdf_document_find_cancel (EvDocumentFind *document)
 646 {
 647         PdfDocument *pdf_document = PDF_DOCUMENT (document);
 648
 649         if (pdf_document->search) {
 650                 pdf_document_search_free (pdf_document->search);
 651                 pdf_document->search = NULL;
 652         }
 653 }
 654
 655 static void
 656 pdf_document_search_free (PdfDocumentSearch   *search)
 657 {
 658         if (search->idle != 0)
 659                 g_source_remove (search->idle);
 660
 661         if (search->output_dev)
 662                 delete search->output_dev;
 663
 664         g_array_free (search->current_page_results, TRUE);
 665         g_free (search->other_page_flags);
 666
 667         g_free (search->ucs4);
 668         g_free (search);
 669 }
 670
 671 static gboolean
 672 pdf_document_has_document_security (EvDocumentSecurity *document_security)
 673 {
 674         /* FIXME: do we really need to have this? */
 675         return FALSE;
 676 }
 677
 678 static void
 679 pdf_document_set_password (EvDocumentSecurity *document_security,
 680                            const char         *password)
 681 {
 682         PdfDocument *document = PDF_DOCUMENT (document_security);
 683
 684         if (document->password)
 685                 g_free (document->password);
 686
 687         document->password = g_strdup (password);
 688 }
 689
 690 static void
 691 pdf_document_ps_export_begin (EvPSExporter *exporter, const char *filename)
 692 {
 693         PdfDocument *document = PDF_DOCUMENT (exporter);
 694
 695         if (document->ps_out)
 696                 delete document->ps_out;
 697
 698         document->ps_out = new PSOutputDev ((char *)filename, document->doc->getXRef(),
 699                                             document->doc->getCatalog(), 1,
 700                                             ev_document_get_n_pages (EV_DOCUMENT (document)),
 701                                             psModePS);
 702 }
 703
 704 static void
 705 pdf_document_ps_export_do_page (EvPSExporter *exporter, int page)
 706 {
 707         PdfDocument *document = PDF_DOCUMENT (exporter);
 708
 709         document->doc->displayPage (document->ps_out, page,
 710                                     72.0, 72.0, 0, gTrue, gFalse);
 711 }
 712
 713 static void
 714 pdf_document_ps_export_end (EvPSExporter *exporter)
 715 {
 716         PdfDocument *document = PDF_DOCUMENT (exporter);
 717
 718         delete document->ps_out;
 719         document->ps_out = NULL;
 720 }
 721
 722
 723 /* EvDocumentLinks Implementation */
 724 typedef struct
 725 {
 726         /* goo GList, not glib */
 727         GList *items;
 728         int index;
 729         int level;
 730 } LinksIter;
 731
 732 static gchar *
 733 unicode_to_char (OutlineItem *outline_item,
 734                  UnicodeMap *uMap)
 735 {
 736         GString gstr;
 737         gchar buf[8]; /* 8 is enough for mapping an unicode char to a string */
 738         int i, n;
 739
 740         for (i = 0; i < outline_item->getTitleLength(); ++i) {
 741                 n = uMap->mapUnicode(outline_item->getTitle()[i], buf, sizeof(buf));
 742                 gstr.append(buf, n);
 743         }
 744
 745         return g_strdup (gstr.getCString ());
 746 }
 747
 748
 749 static gboolean
 750 pdf_document_links_has_document_links (EvDocumentLinks *document_links)
 751 {
 752         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 753         Outline *outline;
 754
 755         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 756
 757         outline = pdf_document->doc->getOutline();
 758         if (outline->getItems() != NULL &&
 759             outline->getItems()->getLength() > 0)
 760                 return TRUE;
 761
 762         return FALSE;
 763 }
 764
 765 static EvDocumentLinksIter *
 766 pdf_document_links_begin_read (EvDocumentLinks *document_links)
 767 {
 768         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 769         Outline *outline;
 770         LinksIter *iter;
 771         GList *items;
 772
 773         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), NULL);
 774
 775         outline = pdf_document->doc->getOutline();
 776         items = outline->getItems();
 777         if (! items)
 778                 return NULL;
 779
 780         iter = g_new0 (LinksIter, 1);
 781         iter->items = items;
 782         iter->index = 0;
 783         iter->level = 0;
 784
 785         return (EvDocumentLinksIter *) iter;
 786 }
 787
 788 static EvLink *
 789 build_link_from_action (PdfDocument *pdf_document,
 790                         LinkAction  *link_action,
 791                         const char  *title)
 792 {
 793         EvLink *link = NULL;
 794
 795         if (link_action->getKind () == actionGoToR) {
 796                 g_warning ("actionGoToR links not implemented");
 797         } else if (link_action->getKind () == actionLaunch) {
 798                 g_warning ("actionLaunch links not implemented");
 799         } else if (link_action->getKind () == actionNamed) {
 800                 g_warning ("actionNamed links not implemented");
 801         } else if (link_action->getKind () == actionMovie) {
 802                 g_warning ("actionMovie links not implemented");
 803         } else if (link_action->getKind () == actionGoTo) {
 804                 LinkDest *link_dest;
 805                 LinkGoTo *link_goto;
 806                 Ref page_ref;
 807                 gint page_num = 0;
 808                 GString *named_dest;
 809
 810                 link_goto = dynamic_cast <LinkGoTo *> (link_action);
 811                 link_dest = link_goto->getDest ();
 812                 named_dest = link_goto->getNamedDest ();
 813
 814                 /* Wow!  This seems excessively slow on large
 815                  * documents. I need to investigate more... -jrb */
 816                 if (link_dest != NULL) {
 817                         link_dest = link_dest->copy ();
 818                 } else if (named_dest != NULL) {
 819                         named_dest = named_dest->copy ();
 820                         link_dest = pdf_document->doc->findDest (named_dest);
 821                         delete named_dest;
 822                 }
 823                 if (link_dest != NULL) {
 824                         if (link_dest->isPageRef ()) {
 825                                 page_ref = link_dest->getPageRef ();
 826                                 page_num = pdf_document->doc->findPage (page_ref.num, page_ref.gen);
 827                         } else {
 828                                 page_num = link_dest->getPageNum ();
 829                         }
 830                         delete link_dest;
 831                 }
 832
 833                 link = ev_link_new_page (title, page_num);
 834         } else if (link_action->getKind () == actionURI) {
 835                 LinkURI *link_uri;
 836
 837                 link_uri = dynamic_cast <LinkURI *> (link_action);
 838                 link = ev_link_new_external
 839                         (title, link_uri->getURI()->getCString());
 840         } else if (link_action->getKind () == actionUnknown) {
 841                 LinkUnknown *link_unknown;
 842
 843                 link_unknown = dynamic_cast <LinkUnknown *> (link_action);
 844
 845                 g_warning ("Unknown link type %s",
 846                            link_unknown->getAction()->getCString());
 847         }
 848
 849         if (link == NULL) {
 850                 link = ev_link_new_title (title);
 851         }
 852
 853         return link;
 854 }
 855
 856 /* FIXME This returns a new object every time, probably we should cache it
 857    in the iter */
 858 static EvLink *
 859 pdf_document_links_get_link (EvDocumentLinks      *document_links,
 860                              EvDocumentLinksIter  *links_iter)
 861 {
 862         PdfDocument *pdf_document = PDF_DOCUMENT (document_links);
 863         LinksIter *iter = (LinksIter *)links_iter;
 864         OutlineItem *anItem;
 865         LinkAction *link_action;
 866         Unicode *link_title;
 867         const char *title;
 868
 869         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 870         g_return_val_if_fail (iter != NULL, FALSE);
 871
 872         anItem = (OutlineItem *)iter->items->get(iter->index);
 873         link_action = anItem->getAction ();
 874         link_title = anItem->getTitle ();
 875         title = unicode_to_char (anItem, pdf_document->umap);
 876
 877         return build_link_from_action (pdf_document, link_action, title);
 878 }
 879
 880 static EvDocumentLinksIter *
 881 pdf_document_links_get_child (EvDocumentLinks     *document_links,
 882                               EvDocumentLinksIter *links_iter)
 883 {
 884         LinksIter *iter = (LinksIter *)links_iter;
 885         LinksIter *child_iter;
 886         OutlineItem *anItem;
 887
 888         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 889
 890         anItem = (OutlineItem *)iter->items->get(iter->index);
 891         anItem->open ();
 892         if (! (anItem->hasKids() && anItem->getKids()) )
 893                 return NULL;
 894
 895         child_iter = g_new0 (LinksIter, 1);
 896         child_iter->index = 0;
 897         child_iter->level = iter->level + 1;
 898         child_iter->items = anItem->getKids ();
 899         g_assert (child_iter->items);
 900
 901         return (EvDocumentLinksIter *) child_iter;
 902 }
 903
 904 static gboolean
 905 pdf_document_links_next (EvDocumentLinks     *document_links,
 906                          EvDocumentLinksIter *links_iter)
 907 {
 908         LinksIter *iter = (LinksIter *) links_iter;
 909
 910         g_return_val_if_fail (PDF_IS_DOCUMENT (document_links), FALSE);
 911
 912         iter->index++;
 913         if (iter->index >= iter->items->getLength())
 914                 return FALSE;
 915
 916         return TRUE;
 917 }
 918
 919 static void
 920 pdf_document_links_free_iter (EvDocumentLinks     *document_links,
 921                               EvDocumentLinksIter *iter)
 922 {
 923         g_return_if_fail (PDF_IS_DOCUMENT (document_links));
 924         g_return_if_fail (iter != NULL);
 925
 926         /* FIXME: Should I close all the nodes?? Free them? */
 927         g_free (iter);
 928 }
 929
 930 static void
 931 pdf_document_finalize (GObject *object)
 932 {
 933         PdfDocument *pdf_document = PDF_DOCUMENT (object);
 934
 935         if (pdf_document->links) {
 936                 delete pdf_document->links;
 937         }
 938
 939         if (pdf_document->umap) {
 940                 pdf_document->umap->decRefCnt ();
 941                 pdf_document->umap = NULL;
 942         }
 943
 944         if (pdf_document->search)
 945                 pdf_document_search_free (pdf_document->search);
 946
 947         if (pdf_document->target)
 948                 g_object_unref (pdf_document->target);
 949
 950         if (pdf_document->out)
 951                 delete pdf_document->out;
 952         if (pdf_document->ps_out)
 953                 delete pdf_document->ps_out;
 954         if (pdf_document->doc)
 955                 delete pdf_document->doc;
 956
 957 }
 958
 959 static void
 960 pdf_document_set_property (GObject *object,
 961                            guint prop_id,
 962                            const GValue *value,
 963                            GParamSpec *pspec)
 964 {
 965         switch (prop_id)
 966
 967         {
 968                 case PROP_TITLE:
 969                         /* read only */
 970                         break;
 971         }
 972 }
 973
 974 static gboolean
 975 has_unicode_marker (GString *string)
 976 {
 977         return ((string->getChar (0) & 0xff) == 0xfe &&
 978                 (string->getChar (1) & 0xff) == 0xff);
 979 }
 980
 981 static gchar *
 982 pdf_info_dict_get_string (Dict *info_dict, const gchar *key) {
 983         Object obj;
 984         GString *value;
 985         gchar *result;
 986
 987         g_return_val_if_fail (info_dict != NULL, NULL);
 988         g_return_val_if_fail (key != NULL, NULL);
 989
 990         if (!info_dict->lookup ((gchar *)key, &obj)->isString ()) {
 991                 obj.free ();
 992                 return NULL;
 993         }
 994
 995         value = obj.getString ();
 996
 997         if (has_unicode_marker (value)) {
 998                 result = g_convert (value->getCString () + 2,
 999                                     value->getLength () - 2,
1000                                     "UTF-8", "UTF-16BE", NULL, NULL, NULL);
1001         } else {
1002                 result = g_strndup (value->getCString (), value->getLength ());
1003         }
1004
1005         obj.free ();
1006
1007         return result;
1008 }
1009
1010 static char *
1011 pdf_document_get_title (PdfDocument *pdf_document)
1012 {
1013         char *title = NULL;
1014         Object info;
1015
1016         if (pdf_document->doc == NULL)
1017                 return NULL;
1018         pdf_document->doc->getDocInfo (&info);
1019
1020         if (info.isDict ()) {
1021                 title = pdf_info_dict_get_string (info.getDict(), "Title");
1022         }
1023
1024         return title;
1025 }
1026
1027 static char *
1028 pdf_document_get_text (EvDocument *document, GdkRectangle *rect)
1029 {
1030         PdfDocument *pdf_document = PDF_DOCUMENT (document);
1031         GString *sel_text = new GString;
1032         const char *text;
1033         int x1, y1, x2, y2;
1034
1035         x1 = rect->x - pdf_document->page_x_offset;
1036         y1 = rect->y - pdf_document->page_y_offset;
1037         x2 = x1 + rect->width;
1038         y2 = y1 + rect->height;
1039
1040         sel_text = pdf_document->out->getText (x1, y1, x2, y2);
1041         text = sel_text->getCString ();
1042
1043         return text ? g_strdup (text) : NULL;
1044 }
1045
1046 static EvLink *
1047 pdf_document_get_link (EvDocument *document, int x, int y)
1048 {
1049         PdfDocument *pdf_document = PDF_DOCUMENT (document);
1050         LinkAction *action;
1051         double link_x, link_y;
1052
1053         if (pdf_document->links == NULL) {
1054                 return NULL;
1055         }
1056
1057         /* Offset */
1058         link_x = x - pdf_document->page_x_offset;
1059         link_y = y - pdf_document->page_y_offset;
1060
1061         /* Inverse y */
1062         link_y = pdf_document->out->getBitmapHeight() - link_y;
1063
1064         /* Zoom */
1065         link_x = link_x / pdf_document->scale;
1066         link_y = link_y / pdf_document->scale;
1067
1068         action = pdf_document->links->find (link_x, link_y);
1069
1070         if (action) {
1071                 return build_link_from_action (pdf_document, action, "");
1072         } else {
1073                 return NULL;
1074         }
1075 }
1076
1077 static void
1078 pdf_document_get_property (GObject *object,
1079                            guint prop_id,
1080                            GValue *value,
1081                            GParamSpec *pspec)
1082 {
1083         PdfDocument *pdf_document = PDF_DOCUMENT (object);
1084         char *title;
1085
1086         switch (prop_id)
1087         {
1088                 case PROP_TITLE:
1089                         title = pdf_document_get_title (pdf_document);
1090                         g_value_set_string (value, title);
1091                         g_free (title);
1092                         break;
1093         }
1094 }
1095
1096 static void
1097 pdf_document_class_init (PdfDocumentClass *klass)
1098 {
1099         GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1100
1101         gobject_class->finalize = pdf_document_finalize;
1102         gobject_class->get_property = pdf_document_get_property;
1103         gobject_class->set_property = pdf_document_set_property;
1104
1105         g_object_class_override_property (gobject_class, PROP_TITLE, "title");
1106 }
1107
1108 static void
1109 pdf_document_document_iface_init (EvDocumentIface *iface)
1110 {
1111         iface->load = pdf_document_load;
1112         iface->save = pdf_document_save;
1113         iface->get_text = pdf_document_get_text;
1114         iface->get_link = pdf_document_get_link;
1115         iface->get_n_pages = pdf_document_get_n_pages;
1116         iface->set_page = pdf_document_set_page;
1117         iface->get_page = pdf_document_get_page;
1118         iface->set_scale = pdf_document_set_scale;
1119         iface->set_target = pdf_document_set_target;
1120         iface->set_page_offset = pdf_document_set_page_offset;
1121         iface->get_page_size = pdf_document_get_page_size;
1122         iface->render = pdf_document_render;
1123 }
1124
1125 static void
1126 pdf_document_ps_exporter_iface_init (EvPSExporterIface *iface)
1127 {
1128         iface->begin = pdf_document_ps_export_begin;
1129         iface->do_page = pdf_document_ps_export_do_page;
1130         iface->end = pdf_document_ps_export_end;
1131 }
1132
1133
1134 static void
1135 pdf_document_find_iface_init (EvDocumentFindIface *iface)
1136 {
1137         iface->begin = pdf_document_find_begin;
1138         iface->get_n_results = pdf_document_find_get_n_results;
1139         iface->get_result = pdf_document_find_get_result;
1140         iface->page_has_results = pdf_document_find_page_has_results;
1141         iface->get_progress = pdf_document_find_get_progress;
1142         iface->cancel = pdf_document_find_cancel;
1143 }
1144
1145 static void
1146 pdf_document_security_iface_init (EvDocumentSecurityIface *iface)
1147 {
1148         iface->has_document_security = pdf_document_has_document_security;
1149         iface->set_password = pdf_document_set_password;
1150 }
1151
1152 static void
1153 pdf_document_document_links_iface_init (EvDocumentLinksIface *iface)
1154 {
1155         iface->has_document_links = pdf_document_links_has_document_links;
1156         iface->begin_read = pdf_document_links_begin_read;
1157         iface->get_link = pdf_document_links_get_link;
1158         iface->get_child = pdf_document_links_get_child;
1159         iface->next = pdf_document_links_next;
1160         iface->free_iter = pdf_document_links_free_iter;
1161 }
1162
1163 /* Thumbnails */
1164
1165 static GdkPixbuf *
1166 bitmap_to_pixbuf (SplashBitmap *bitmap,
1167                   GdkPixbuf    *target,
1168                   gint          x_offset,
1169                   gint          y_offset)
1170 {
1171         gint width;
1172         gint height;
1173         SplashColorPtr dataPtr;
1174         int x, y;
1175
1176         gboolean target_has_alpha;
1177         gint target_rowstride;
1178         guchar *target_data;
1179
1180         width = bitmap->getWidth ();
1181         height = bitmap->getHeight ();
1182
1183         if (width + x_offset > gdk_pixbuf_get_width (target))
1184                 width = gdk_pixbuf_get_width (target) - x_offset;
1185         if (height + y_offset > gdk_pixbuf_get_height (target))
1186                 height = gdk_pixbuf_get_height (target) - x_offset;
1187
1188         target_has_alpha = gdk_pixbuf_get_has_alpha (target);
1189         target_rowstride = gdk_pixbuf_get_rowstride (target);
1190         target_data = gdk_pixbuf_get_pixels (target);
1191
1192         dataPtr = bitmap->getDataPtr ();
1193
1194         for (y = 0; y < height; y++) {
1195                 SplashRGB8 *p;
1196                 SplashRGB8 rgb;
1197                 guchar *q;
1198
1199                 p = dataPtr.rgb8 + y * width;
1200                 q = target_data + ((y + y_offset) * target_rowstride +
1201                                    x_offset * (target_has_alpha?4:3));
1202                 for (x = 0; x < width; x++) {
1203                         rgb = *p++;
1204
1205                         *q++ = splashRGB8R (rgb);
1206                         *q++ = splashRGB8G (rgb);
1207                         *q++ = splashRGB8B (rgb);
1208
1209                         if (target_has_alpha)
1210                                 q++;
1211                 }
1212         }
1213
1214         return target;
1215 }
1216
1217
1218 static GdkPixbuf *
1219 pdf_document_thumbnails_get_page_pixbuf (PdfDocument *pdf_document,
1220                                          gdouble      scale_factor,
1221                                          gint         page_num,
1222                                          gint         width,
1223                                          gint         height)
1224 {
1225         SplashOutputDev *output;
1226         GdkPixbuf *pixbuf;
1227         SplashColor color;
1228
1229         color.rgb8 = splashMakeRGB8 (255, 255, 255);
1230
1231         output = new SplashOutputDev (splashModeRGB8, gFalse, color);
1232         output->startDoc (pdf_document->doc->getXRef());
1233         pdf_document->doc->displayPage (output,
1234                                         page_num + 1,
1235                                         72*scale_factor,
1236                                         72*scale_factor,
1237                                         0, gTrue, gFalse);
1238
1239         pixbuf = ev_document_misc_get_thumbnail_frame (output->getBitmap()->getWidth(),
1240                                                        output->getBitmap()->getHeight(),
1241                                                        NULL);
1242         bitmap_to_pixbuf (output->getBitmap(), pixbuf, 1, 1);
1243         delete output;
1244
1245         return pixbuf;
1246 }
1247
1248 static void
1249 pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnails,
1250                                         gint                  page,
1251                                         gint                  suggested_width,
1252                                         gint                 *width,
1253                                         gint                 *height)
1254 {
1255         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1256         Page *the_page;
1257         Object the_thumb;
1258         Thumb *thumb = NULL;
1259         gdouble page_ratio;
1260
1261         the_page = pdf_document->doc->getCatalog ()->getPage (page);
1262         the_page->getThumb (&the_thumb);
1263
1264         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1265                 /* Build the thumbnail object */
1266                 thumb = new Thumb(pdf_document->doc->getXRef (),
1267                                   &the_thumb);
1268
1269                 *width = thumb->getWidth ();
1270                 *height = thumb->getHeight ();
1271         } else {
1272                 page_ratio = the_page->getHeight () / the_page->getWidth ();
1273                 *width = suggested_width;
1274                 *height = (gint) (suggested_width * page_ratio);
1275         }
1276 }
1277
1278 static GdkPixbuf *
1279 pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails,
1280                                        gint                  page,
1281                                        gint                  width)
1282 {
1283         PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
1284         GdkPixbuf *thumbnail;
1285         Page *the_page;
1286         Object the_thumb;
1287         Thumb *thumb = NULL;
1288         gboolean have_ethumbs = FALSE;
1289         gdouble page_ratio;
1290         gint dest_height;
1291
1292         /* getPage seems to want page + 1 for some reason; */
1293         the_page = pdf_document->doc->getCatalog ()->getPage (page + 1);
1294         the_page->getThumb(&the_thumb);
1295
1296         page_ratio = the_page->getHeight () / the_page->getWidth ();
1297         dest_height = (gint) (width * page_ratio);
1298
1299
1300         if (!(the_thumb.isNull () || the_thumb.isNone())) {
1301                 /* Build the thumbnail object */
1302                 thumb = new Thumb(pdf_document->doc->getXRef (),
1303                                   &the_thumb);
1304
1305                 have_ethumbs = thumb->ok();
1306         }
1307
1308         if (have_ethumbs) {
1309                 guchar *data;
1310                 GdkPixbuf *tmp_pixbuf;
1311
1312                 data = thumb->getPixbufData();
1313                 tmp_pixbuf = gdk_pixbuf_new_from_data (data,
1314                                                        GDK_COLORSPACE_RGB,
1315                                                        FALSE,
1316                                                        8,
1317                                                        thumb->getWidth (),
1318                                                        thumb->getHeight (),
1319                                                        thumb->getWidth () * 3,
1320                                                        NULL, NULL);
1321                 /* FIXME: do we want to check that the thumb's size isn't ridiculous?? */
1322                 thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
1323                 g_object_unref (tmp_pixbuf);
1324         } else {
1325                 gdouble scale_factor;
1326
1327                 scale_factor = (gdouble)width / the_page->getWidth ();
1328
1329                 thumbnail = pdf_document_thumbnails_get_page_pixbuf (pdf_document,
1330                                                                      scale_factor,
1331                                                                      page,
1332                                                                      width,
1333                                                                      dest_height);
1334         }
1335
1336         return thumbnail;
1337 }
1338 static void
1339 pdf_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
1340 {
1341         iface->get_thumbnail = pdf_document_thumbnails_get_thumbnail;
1342         iface->get_dimensions = pdf_document_thumbnails_get_dimensions;
1343 }
1344
1345
1346 static void
1347 pdf_document_init (PdfDocument *pdf_document)
1348 {
1349         pdf_document->page = 1;
1350         pdf_document->page_x_offset = 0;
1351         pdf_document->page_y_offset = 0;
1352         pdf_document->scale = 1.;
1353
1354         pdf_document->password = NULL;
1355 }
1356