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