pdf/xpdf/pdf-document.cc

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