ps/ps-document.c

   1 /* Ghostscript widget for GTK/GNOME
   2  *
   3  * Copyright (C) 1998 - 2005 the Free Software Foundation
   4  *
   5  * Authors: Jonathan Blandford, Jaka Mocnik
   6  *
   7  * Based on code by: Federico Mena (Quartic), Szekeres Istvan (Pista)
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Library General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Library General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Library General Public
  20  * License along with this library; if not, write to the
  21  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22  * Boston, MA 02111-1307, USA.
  23  */
  24
  25 #include "config.h"
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #include <signal.h>
  29 #include <gtk/gtk.h>
  30 #include <gtk/gtkobject.h>
  31 #include <gdk/gdkprivate.h>
  32 #include <gdk/gdkx.h>
  33 #include <gdk/gdk.h>
  34 #include <glib/gi18n.h>
  35 #include <X11/Intrinsic.h>
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <stdlib.h>
  39 #include <errno.h>
  40 #include <sys/stat.h>
  41 #include <sys/types.h>
  42 #include <sys/wait.h>
  43 #include <stdio.h>
  44 #include <math.h>
  45
  46 #include "ps-document.h"
  47 #include "ev-debug.h"
  48 #include "gsdefaults.h"
  49 #include "ev-ps-exporter.h"
  50 #include "ev-async-renderer.h"
  51
  52 #define MAX_BUFSIZE 1024
  53
  54 #define PS_DOCUMENT_IS_COMPRESSED(gs) (PS_DOCUMENT(gs)->gs_filename_unc != NULL)
  55 #define PS_DOCUMENT_GET_PS_FILE(gs)   (PS_DOCUMENT_IS_COMPRESSED(gs) ? \
  56                                        PS_DOCUMENT(gs)->gs_filename_unc : \
  57                                        PS_DOCUMENT(gs)->gs_filename)
  58
  59 /* structure to describe section of file to send to ghostscript */
  60 struct record_list
  61 {
  62         FILE *fp;
  63         long begin;
  64         guint len;
  65         gboolean seek_needed;
  66         gboolean close;
  67         struct record_list *next;
  68 };
  69
  70 static gboolean broken_pipe = FALSE;
  71
  72 /* Forward declarations */
  73 static void     ps_document_init                        (PSDocument           *gs);
  74 static void     ps_document_class_init                  (PSDocumentClass      *klass);
  75 static void     send_ps                                 (PSDocument           *gs,
  76                                                          long                  begin,
  77                                                          unsigned int          len,
  78                                                          gboolean              close);
  79 static void     output                                  (gpointer              data,
  80                                                          gint                  source,
  81                                                          GdkInputCondition     condition);
  82 static void     input                                   (gpointer              data,
  83                                                          gint                  source,
  84                                                          GdkInputCondition     condition);
  85 static void     stop_interpreter                        (PSDocument           *gs);
  86 static gint     start_interpreter                       (PSDocument           *gs);
  87 static void     ps_document_document_iface_init         (EvDocumentIface      *iface);
  88 static void     ps_document_ps_exporter_iface_init      (EvPSExporterIface    *iface);
  89 static void     ps_async_renderer_iface_init            (EvAsyncRendererIface *iface);
  90
  91 G_DEFINE_TYPE_WITH_CODE (PSDocument, ps_document, G_TYPE_OBJECT,
  92                          {
  93                                  G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
  94                                                         ps_document_document_iface_init);
  95                                  G_IMPLEMENT_INTERFACE (EV_TYPE_PS_EXPORTER,
  96                                                         ps_document_ps_exporter_iface_init);
  97                                  G_IMPLEMENT_INTERFACE (EV_TYPE_ASYNC_RENDERER,
  98                                                         ps_async_renderer_iface_init);
  99                          });
 100
 101 static GObjectClass *parent_class = NULL;
 102 static PSDocumentClass *gs_class = NULL;
 103
 104 static void
 105 ps_document_init (PSDocument *gs)
 106 {
 107         gs->bpixmap = NULL;
 108
 109         gs->interpreter_pid = -1;
 110
 111         gs->busy = FALSE;
 112         gs->gs_filename = 0;
 113         gs->gs_filename_unc = 0;
 114
 115         broken_pipe = FALSE;
 116
 117         gs->structured_doc = FALSE;
 118         gs->reading_from_pipe = FALSE;
 119         gs->send_filename_to_gs = FALSE;
 120
 121         gs->doc = NULL;
 122
 123         gs->interpreter_input = -1;
 124         gs->interpreter_output = -1;
 125         gs->interpreter_err = -1;
 126         gs->interpreter_input_id = 0;
 127         gs->interpreter_output_id = 0;
 128         gs->interpreter_error_id = 0;
 129
 130         gs->ps_input = NULL;
 131         gs->input_buffer = NULL;
 132         gs->input_buffer_ptr = NULL;
 133         gs->bytes_left = 0;
 134         gs->buffer_bytes_left = 0;
 135
 136         gs->gs_status = _("No document loaded.");
 137
 138         gs->ps_export_pagelist = NULL;
 139         gs->ps_export_filename = NULL;
 140
 141         gs->orientation = GTK_GS_ORIENTATION_NONE;
 142 }
 143
 144 static void
 145 ps_document_dispose (GObject *object)
 146 {
 147         PSDocument *gs = PS_DOCUMENT (object);
 148
 149         g_return_if_fail (gs != NULL);
 150
 151         if (gs->gs_psfile) {
 152                 fclose (gs->gs_psfile);
 153                 gs->gs_psfile = NULL;
 154         }
 155
 156         if (gs->gs_filename) {
 157                 g_free (gs->gs_filename);
 158                 gs->gs_filename = NULL;
 159         }
 160
 161         if (gs->doc) {
 162                 psfree (gs->doc);
 163                 gs->doc = NULL;
 164         }
 165
 166         if (gs->gs_filename_unc) {
 167                 unlink(gs->gs_filename_unc);
 168                 g_free(gs->gs_filename_unc);
 169                 gs->gs_filename_unc = NULL;
 170         }
 171
 172         if (gs->bpixmap) {
 173                 gdk_drawable_unref (gs->bpixmap);
 174         }
 175
 176         if(gs->input_buffer) {
 177                 g_free(gs->input_buffer);
 178                 gs->input_buffer = NULL;
 179         }
 180
 181         if (gs->target_window) {
 182                 gtk_widget_destroy (gs->target_window);
 183                 gs->target_window = NULL;
 184                 gs->pstarget = NULL;
 185         }
 186
 187         stop_interpreter (gs);
 188
 189         G_OBJECT_CLASS (parent_class)->dispose (object);
 190 }
 191
 192 static void
 193 ps_document_class_init(PSDocumentClass *klass)
 194 {
 195         GObjectClass *object_class;
 196
 197         object_class = (GObjectClass *) klass;
 198         parent_class = g_type_class_peek_parent (klass);
 199         gs_class = klass;
 200
 201         object_class->dispose = ps_document_dispose;
 202
 203         klass->gs_atom = gdk_atom_intern ("GHOSTVIEW", FALSE);
 204         klass->next_atom = gdk_atom_intern ("NEXT", FALSE);
 205         klass->page_atom = gdk_atom_intern ("PAGE", FALSE);
 206         klass->string_atom = gdk_atom_intern ("STRING", FALSE);
 207 }
 208
 209 static void
 210 push_pixbuf (PSDocument *gs)
 211 {
 212         GdkColormap *cmap;
 213         GdkPixbuf *pixbuf;
 214         int width, height;
 215
 216         cmap = gdk_window_get_colormap (gs->pstarget);
 217         gdk_drawable_get_size (gs->bpixmap, &width, &height);
 218         pixbuf =  gdk_pixbuf_get_from_drawable (NULL, gs->bpixmap, cmap,
 219                                                 0, 0, 0, 0,
 220                                                 width, height);
 221         g_signal_emit_by_name (gs, "render_finished", pixbuf);
 222         g_object_unref (pixbuf);
 223 }
 224
 225 static void
 226 interpreter_failed (PSDocument *gs, char *msg)
 227 {
 228         LOG ("Interpreter failed %s", msg);
 229
 230         push_pixbuf (gs);
 231
 232         stop_interpreter (gs);
 233 }
 234
 235 static gboolean
 236 ps_document_widget_event (GtkWidget *widget, GdkEvent *event, gpointer data)
 237 {
 238         PSDocument *gs = (PSDocument *) data;
 239
 240         if(event->type != GDK_CLIENT_EVENT)
 241                 return FALSE;
 242
 243         gs->message_window = event->client.data.l[0];
 244
 245         if (event->client.message_type == gs_class->page_atom) {
 246                 LOG ("GS rendered the document");
 247                 gs->busy = FALSE;
 248
 249                 push_pixbuf (gs);
 250         }
 251
 252         return TRUE;
 253 }
 254
 255 static void
 256 send_ps (PSDocument *gs, long begin, unsigned int len, gboolean close)
 257 {
 258         struct record_list *ps_new;
 259
 260         if (gs->interpreter_input < 0) {
 261                 g_critical("No pipe to gs: error in send_ps().");
 262                 return;
 263         }
 264
 265         ps_new = g_new0 (struct record_list, 1);
 266         ps_new->fp = gs->gs_psfile;
 267         ps_new->begin = begin;
 268         ps_new->len = len;
 269         ps_new->seek_needed = TRUE;
 270         ps_new->close = close;
 271         ps_new->next = NULL;
 272
 273         if (gs->input_buffer == NULL) {
 274                 gs->input_buffer = g_malloc(MAX_BUFSIZE);
 275         }
 276
 277         if (gs->ps_input == NULL) {
 278                 gs->input_buffer_ptr = gs->input_buffer;
 279                 gs->bytes_left = len;
 280                 gs->buffer_bytes_left = 0;
 281                 gs->ps_input = ps_new;
 282                 gs->interpreter_input_id = gdk_input_add
 283                         (gs->interpreter_input, GDK_INPUT_WRITE, input, gs);
 284         } else {
 285                 struct record_list *p = gs->ps_input;
 286                 while (p->next != NULL) {
 287                         p = p->next;
 288                 }
 289                 p->next = ps_new;
 290         }
 291 }
 292
 293 static float
 294 get_xdpi (PSDocument *gs)
 295 {
 296         return 25.4 * gdk_screen_width() / gdk_screen_width_mm();
 297 }
 298
 299 static float
 300 get_ydpi (PSDocument *gs)
 301 {
 302         return 25.4 * gdk_screen_height() / gdk_screen_height_mm();
 303 }
 304
 305 static void
 306 setup_pixmap (PSDocument *gs, int page, double scale)
 307 {
 308         GdkGC *fill;
 309         GdkColor white = { 0, 0xFFFF, 0xFFFF, 0xFFFF };   /* pixel, r, g, b */
 310         GdkColormap *colormap;
 311         double width, height;
 312         int pixmap_width, pixmap_height;
 313
 314         ev_document_get_page_size (EV_DOCUMENT (gs), page, &width, &height);
 315         pixmap_width = width * scale + 0.5;
 316         pixmap_height = height * scale + 0.5;
 317
 318         if(gs->bpixmap) {
 319                 int w, h;
 320
 321                 gdk_drawable_get_size (gs->bpixmap, &w, &h);
 322
 323                 if (pixmap_width != w || h != pixmap_height) {
 324                         gdk_drawable_unref (gs->bpixmap);
 325                         gs->bpixmap = NULL;
 326                         stop_interpreter (gs);
 327                 }
 328         }
 329
 330         if (!gs->bpixmap) {
 331                 LOG ("Create pixmap");
 332
 333                 fill = gdk_gc_new (gs->pstarget);
 334                 colormap = gdk_drawable_get_colormap (gs->pstarget);
 335                 gdk_color_alloc (colormap, &white);
 336                 gdk_gc_set_foreground (fill, &white);
 337                 gs->bpixmap = gdk_pixmap_new (gs->pstarget, pixmap_width,
 338                                               pixmap_height, -1);
 339                 gdk_draw_rectangle (gs->bpixmap, fill, TRUE,
 340                                     0, 0, pixmap_width, pixmap_height);
 341         }
 342 }
 343
 344 #define DEFAULT_PAGE_SIZE 1
 345
 346 static void
 347 get_page_box (PSDocument *gs, int page, int *urx, int *ury, int *llx, int *lly)
 348 {
 349         gint new_llx = 0;
 350         gint new_lly = 0;
 351         gint new_urx = 0;
 352         gint new_ury = 0;
 353         GtkGSPaperSize *papersizes = gtk_gs_defaults_get_paper_sizes ();
 354         int new_pagesize = -1;
 355
 356         g_return_if_fail (PS_IS_DOCUMENT (gs));
 357
 358         if (new_pagesize == -1) {
 359                 new_pagesize = DEFAULT_PAGE_SIZE;
 360                 if (gs->doc) {
 361                 /* If we have a document:
 362                  * We use -- the page size (if specified)
 363                  * or the doc. size (if specified)
 364                  * or the page bbox (if specified)
 365                  * or the bounding box
 366                  */
 367                         if ((page >= 0) && (gs->doc->numpages > page) &&
 368                             (gs->doc->pages) && (gs->doc->pages[page].size)) {
 369                                 new_pagesize = gs->doc->pages[page].size - gs->doc->size;
 370                         } else if (gs->doc->default_page_size != NULL) {
 371                                 new_pagesize = gs->doc->default_page_size - gs->doc->size;
 372                         } else if ((page >= 0) &&
 373                                    (gs->doc->numpages > page) &&
 374                                    (gs->doc->pages) &&
 375                                    (gs->doc->pages[page].boundingbox[URX] >
 376                                     gs->doc->pages[page].boundingbox[LLX]) &&
 377                                    (gs->doc->pages[page].boundingbox[URY] >
 378                                     gs->doc->pages[page].boundingbox[LLY])) {
 379                                 new_pagesize = -1;
 380                         } else if ((gs->doc->boundingbox[URX] > gs->doc->boundingbox[LLX]) &&
 381                                    (gs->doc->boundingbox[URY] > gs->doc->boundingbox[LLY])) {
 382                                 new_pagesize = -1;
 383                         }
 384                 }
 385         }
 386
 387         /* Compute bounding box */
 388         if (gs->doc && (gs->doc->epsf || new_pagesize == -1)) {    /* epsf or bbox */
 389                 if ((page >= 0) &&
 390                     (gs->doc->pages) &&
 391                     (gs->doc->pages[page].boundingbox[URX] >
 392                      gs->doc->pages[page].boundingbox[LLX]) &&
 393                     (gs->doc->pages[page].boundingbox[URY] >
 394                      gs->doc->pages[page].boundingbox[LLY])) {
 395                         /* use page bbox */
 396                         new_llx = gs->doc->pages[page].boundingbox[LLX];
 397                         new_lly = gs->doc->pages[page].boundingbox[LLY];
 398                         new_urx = gs->doc->pages[page].boundingbox[URX];
 399                         new_ury = gs->doc->pages[page].boundingbox[URY];
 400                 } else if ((gs->doc->boundingbox[URX] > gs->doc->boundingbox[LLX]) &&
 401                            (gs->doc->boundingbox[URY] > gs->doc->boundingbox[LLY])) {
 402                         /* use doc bbox */
 403                         new_llx = gs->doc->boundingbox[LLX];
 404                         new_lly = gs->doc->boundingbox[LLY];
 405                         new_urx = gs->doc->boundingbox[URX];
 406                         new_ury = gs->doc->boundingbox[URY];
 407                 }
 408         } else {
 409                 if (new_pagesize < 0)
 410                         new_pagesize = DEFAULT_PAGE_SIZE;
 411                 new_llx = new_lly = 0;
 412                 if (gs->doc && gs->doc->size &&
 413                     (new_pagesize < gs->doc->numsizes)) {
 414                         new_urx = gs->doc->size[new_pagesize].width;
 415                         new_ury = gs->doc->size[new_pagesize].height;
 416                 } else {
 417                         new_urx = papersizes[new_pagesize].width;
 418                         new_ury = papersizes[new_pagesize].height;
 419                 }
 420         }
 421
 422         if (new_urx <= new_llx)
 423                 new_urx = papersizes[12].width;
 424         if (new_ury <= new_lly)
 425                 new_ury = papersizes[12].height;
 426
 427         *urx = new_urx;
 428         *ury = new_ury;
 429         *llx = new_llx;
 430         *lly = new_lly;
 431 }
 432
 433 static int
 434 get_page_orientation (PSDocument *gs, int page)
 435 {
 436         int orientation;
 437
 438         orientation = GTK_GS_ORIENTATION_NONE;
 439
 440         if (gs->structured_doc) {
 441                 orientation = gs->doc->pages[page].orientation;
 442         }
 443         if (orientation == GTK_GS_ORIENTATION_NONE) {
 444                 orientation = gs->doc->default_page_orientation;
 445         }
 446         if (orientation == GTK_GS_ORIENTATION_NONE) {
 447                 orientation = gs->doc->orientation;
 448         }
 449         if (orientation == GTK_GS_ORIENTATION_NONE) {
 450                 orientation = GTK_GS_ORIENTATION_PORTRAIT;
 451         }
 452         if (gs->orientation != GTK_GS_ORIENTATION_NONE) {
 453                 orientation = gs->orientation;
 454         }
 455
 456         return orientation;
 457 }
 458
 459 static void
 460 setup_page (PSDocument *gs, int page, double scale)
 461 {
 462         char buf[1024];
 463         int urx, ury, llx, lly, orientation;
 464         char scaled_xdpi[G_ASCII_DTOSTR_BUF_SIZE];
 465         char scaled_ydpi[G_ASCII_DTOSTR_BUF_SIZE];
 466
 467         LOG ("Setup the page");
 468
 469         get_page_box (gs, page, &urx, &ury, &llx, &lly);
 470         orientation = get_page_orientation (gs, page);
 471         g_ascii_dtostr (scaled_xdpi, G_ASCII_DTOSTR_BUF_SIZE, get_xdpi (gs) * scale);
 472         g_ascii_dtostr (scaled_ydpi, G_ASCII_DTOSTR_BUF_SIZE, get_ydpi (gs) * scale);
 473
 474         g_snprintf (buf, 1024, "%ld %d %d %d %d %d %s %s %d %d %d %d",
 475                     0L, orientation * 90, llx, lly, urx, ury,
 476                     scaled_xdpi, scaled_ydpi,
 477                     0, 0, 0, 0);
 478         LOG ("GS property %s", buf);
 479
 480         gdk_property_change (gs->pstarget, gs_class->gs_atom, gs_class->string_atom,
 481                              8, GDK_PROP_MODE_REPLACE, (guchar *)buf, strlen(buf));
 482         gdk_flush ();
 483 }
 484
 485 static void
 486 close_pipe (int p[2])
 487 {
 488         if (p[0] != -1) {
 489                 close (p[0]);
 490         }
 491         if (p[1] != -1) {
 492                 close (p[1]);
 493         }
 494 }
 495
 496 static gboolean
 497 is_interpreter_ready (PSDocument *gs)
 498 {
 499         return (gs->interpreter_pid != -1 && !gs->busy && gs->ps_input == NULL);
 500 }
 501
 502 static void
 503 output (gpointer data, gint source, GdkInputCondition condition)
 504 {
 505         char buf[MAX_BUFSIZE + 1];
 506         guint bytes = 0;
 507         PSDocument *gs = PS_DOCUMENT(data);
 508
 509         if (source == gs->interpreter_output) {
 510                 bytes = read(gs->interpreter_output, buf, MAX_BUFSIZE);
 511                 if (bytes == 0) {            /* EOF occurred */
 512                         close (gs->interpreter_output);
 513                         gs->interpreter_output = -1;
 514                         gdk_input_remove (gs->interpreter_output_id);
 515                         return;
 516                 } else if (bytes == -1) {
 517                         /* trouble... */
 518                         interpreter_failed (gs, NULL);
 519                         return;
 520                 }
 521                 if (gs->interpreter_err == -1) {
 522                         interpreter_failed (gs, NULL);
 523                 }
 524         } else if (source == gs->interpreter_err) {
 525                 bytes = read (gs->interpreter_err, buf, MAX_BUFSIZE);
 526                 if (bytes == 0) {            /* EOF occurred */
 527                         close (gs->interpreter_err);
 528                         gs->interpreter_err = -1;
 529                         gdk_input_remove (gs->interpreter_error_id);
 530                         return;
 531                 } else if (bytes == -1) {
 532                         /* trouble... */
 533                         interpreter_failed (gs, NULL);
 534                         return;
 535                 }
 536                 if (gs->interpreter_output == -1) {
 537                         interpreter_failed(gs, NULL);
 538                 }
 539         }
 540
 541         if (bytes > 0) {
 542                 buf[bytes] = '\0';
 543                 printf ("%s", buf);
 544         }
 545 }
 546
 547 static void
 548 catchPipe (int i)
 549 {
 550         broken_pipe = True;
 551 }
 552
 553 static void
 554 input(gpointer data, gint source, GdkInputCondition condition)
 555 {
 556         PSDocument *gs = PS_DOCUMENT(data);
 557         int bytes_written;
 558         void (*oldsig) (int);
 559         oldsig = signal(SIGPIPE, catchPipe);
 560
 561         LOG ("Input");
 562
 563         do {
 564                 if (gs->buffer_bytes_left == 0) {
 565                         /* Get a new section if required */
 566                         if (gs->ps_input && gs->bytes_left == 0) {
 567                                 struct record_list *ps_old = gs->ps_input;
 568                                 gs->ps_input = ps_old->next;
 569                                 if (ps_old->close && NULL != ps_old->fp)
 570                                         fclose (ps_old->fp);
 571                                 g_free (ps_old);
 572                         }
 573
 574                         /* Have to seek at the beginning of each section */
 575                         if (gs->ps_input && gs->ps_input->seek_needed) {
 576                                 fseek (gs->ps_input->fp, gs->ps_input->begin, SEEK_SET);
 577                                 gs->ps_input->seek_needed = FALSE;
 578                                 gs->bytes_left = gs->ps_input->len;
 579                         }
 580
 581                         if (gs->bytes_left > MAX_BUFSIZE) {
 582                                 gs->buffer_bytes_left = fread (gs->input_buffer, sizeof(char),
 583                                                                MAX_BUFSIZE, gs->ps_input->fp);
 584                         } else if (gs->bytes_left > 0) {
 585                                 gs->buffer_bytes_left = fread (gs->input_buffer, sizeof(char),
 586                                                                gs->bytes_left, gs->ps_input->fp);
 587                         } else {
 588                                 gs->buffer_bytes_left = 0;
 589                         }
 590                         if (gs->bytes_left > 0 && gs->buffer_bytes_left == 0) {
 591                                 interpreter_failed (gs, NULL); /* Error occurred */
 592                         }
 593                         gs->input_buffer_ptr = gs->input_buffer;
 594                         gs->bytes_left -= gs->buffer_bytes_left;
 595                 }
 596
 597                 if (gs->buffer_bytes_left > 0) {
 598                         bytes_written = write (gs->interpreter_input,
 599                                                gs->input_buffer_ptr, gs->buffer_bytes_left);
 600
 601                         if (broken_pipe) {
 602                                 interpreter_failed (gs, g_strdup(_("Broken pipe.")));
 603                                 broken_pipe = FALSE;
 604                                 interpreter_failed (gs, NULL);
 605                         } else if (bytes_written == -1) {
 606                                 if ((errno != EWOULDBLOCK) && (errno != EAGAIN)) {
 607                                         interpreter_failed (gs, NULL);   /* Something bad happened */
 608                                 }
 609                                 } else {
 610                                 gs->buffer_bytes_left -= bytes_written;
 611                                 gs->input_buffer_ptr += bytes_written;
 612                         }
 613                 }
 614         } while (gs->ps_input && gs->buffer_bytes_left == 0);
 615
 616         signal (SIGPIPE, oldsig);
 617
 618         if (gs->ps_input == NULL && gs->buffer_bytes_left == 0) {
 619                 if (gs->interpreter_input_id != 0) {
 620                         gdk_input_remove (gs->interpreter_input_id);
 621                         gs->interpreter_input_id = 0;
 622                 }
 623         }
 624 }
 625
 626 static int
 627 start_interpreter (PSDocument *gs)
 628 {
 629         int std_in[2] = { -1, -1 };   /* pipe to interp stdin */
 630         int std_out[2];               /* pipe from interp stdout */
 631         int std_err[2];               /* pipe from interp stderr */
 632
 633 #define NUM_ARGS    100
 634 #define NUM_GS_ARGS (NUM_ARGS - 20)
 635 #define NUM_ALPHA_ARGS 10
 636
 637         char *argv[NUM_ARGS], *dir, *gv_env;
 638         char **gs_args, **alpha_args = NULL;
 639         int argc = 0, i;
 640
 641         LOG ("Start the interpreter");
 642
 643         if(!gs->gs_filename)
 644                 return 0;
 645
 646         stop_interpreter(gs);
 647
 648         /* set up the args... */
 649         gs_args = g_strsplit (gtk_gs_defaults_get_interpreter_cmd (), " ", NUM_GS_ARGS);
 650         for(i = 0; i < NUM_GS_ARGS && gs_args[i]; i++, argc++) {
 651                 argv[argc] = gs_args[i];
 652         }
 653
 654         alpha_args = g_strsplit (ALPHA_PARAMS, " ", NUM_ALPHA_ARGS);
 655         for(i = 0; i < NUM_ALPHA_ARGS && alpha_args[i]; i++, argc++) {
 656                 argv[argc] = alpha_args[i];
 657         }
 658
 659         argv[argc++] = "-dNOPAUSE";
 660         argv[argc++] = "-dQUIET";
 661         argv[argc++] = "-dSAFER";
 662
 663         /* set up the pipes */
 664         if (gs->send_filename_to_gs) {
 665                 argv[argc++] = PS_DOCUMENT_GET_PS_FILE (gs);
 666                 argv[argc++] = "-c";
 667                 argv[argc++] = "quit";
 668         } else {
 669                 argv[argc++] = "-";
 670         }
 671
 672         argv[argc++] = NULL;
 673
 674         if (!gs->reading_from_pipe && !gs->send_filename_to_gs) {
 675                 if (pipe (std_in) == -1) {
 676                         g_critical ("Unable to open pipe to Ghostscript.");
 677                         return -1;
 678                 }
 679         }
 680
 681         if (pipe (std_out) == -1) {
 682                 close_pipe (std_in);
 683                 return -1;
 684         }
 685
 686         if (pipe(std_err) == -1) {
 687                 close_pipe (std_in);
 688                 close_pipe (std_out);
 689                 return -1;
 690         }
 691
 692         gv_env = g_strdup_printf ("GHOSTVIEW=%ld %ld",
 693                                   gdk_x11_drawable_get_xid (gs->pstarget),
 694                                   gdk_x11_drawable_get_xid (gs->bpixmap));
 695         LOG ("Launching ghostview with env %s", gv_env);
 696
 697         gs->interpreter_pid = fork ();
 698         switch (gs->interpreter_pid) {
 699                 case -1:                     /* error */
 700                         close_pipe (std_in);
 701                         close_pipe (std_out);
 702                         close_pipe (std_err);
 703                         return -2;
 704                         break;
 705                 case 0:                      /* child */
 706                         close (std_out[0]);
 707                         dup2 (std_out[1], 1);
 708                         close (std_out[1]);
 709
 710                         close (std_err[0]);
 711                         dup2 (std_err[1], 2);
 712                         close (std_err[1]);
 713
 714                         if (!gs->reading_from_pipe) {
 715                                 if (gs->send_filename_to_gs) {
 716                                         int stdinfd;
 717                                         /* just in case gs tries to read from stdin */
 718                                         stdinfd = open("/dev/null", O_RDONLY);
 719                                         if (stdinfd != 0) {
 720                                                 dup2(stdinfd, 0);
 721                                                 close(stdinfd);
 722                                         }
 723                                 } else {
 724                                         close (std_in[1]);
 725                                         dup2 (std_in[0], 0);
 726                                         close (std_in[0]);
 727                                 }
 728                         }
 729
 730                         putenv(gv_env);
 731
 732                         /* change to directory where the input file is. This helps
 733                          * with postscript-files which include other files using
 734                          * a relative path */
 735                         dir = g_path_get_dirname (gs->gs_filename);
 736                         chdir (dir);
 737                         g_free (dir);
 738
 739                         execvp (argv[0], argv);
 740
 741                         /* Notify error */
 742                         g_critical ("Unable to execute [%s]\n", argv[0]);
 743                         g_strfreev (gs_args);
 744                         g_free (gv_env);
 745                         g_strfreev (alpha_args);
 746                         _exit (1);
 747                         break;
 748                 default:                     /* parent */
 749                         if (!gs->send_filename_to_gs && !gs->reading_from_pipe) {
 750                                 int result;
 751                                 close (std_in[0]);
 752                                 /* use non-blocking IO for pipe to ghostscript */
 753                                 result = fcntl (std_in[1], F_GETFL, 0);
 754                                 fcntl (std_in[1], F_SETFL, result | O_NONBLOCK);
 755                                 gs->interpreter_input = std_in[1];
 756                         } else {
 757                                 gs->interpreter_input = -1;
 758                         }
 759                         close (std_out[1]);
 760
 761                         gs->interpreter_output = std_out[0];
 762                         close (std_err[1]);
 763                         gs->interpreter_err = std_err[0];
 764                         gs->interpreter_output_id =
 765                                 gdk_input_add (std_out[0], GDK_INPUT_READ, output, gs);
 766                         gs->interpreter_error_id =
 767                                 gdk_input_add (std_err[0], GDK_INPUT_READ, output, gs);
 768                         break;
 769         }
 770
 771         return TRUE;
 772 }
 773
 774 static void
 775 stop_interpreter(PSDocument * gs)
 776 {
 777         if (gs->interpreter_pid > 0) {
 778                 int status = 0;
 779                 LOG ("Stop the interpreter");
 780                 kill (gs->interpreter_pid, SIGTERM);
 781                 while ((wait(&status) == -1) && (errno == EINTR));
 782                 gs->interpreter_pid = -1;
 783                 if (status == 1) {
 784                         gs->gs_status = _("Interpreter failed.");
 785                 }
 786         }
 787
 788         if (gs->interpreter_input >= 0) {
 789                 close (gs->interpreter_input);
 790                 gs->interpreter_input = -1;
 791                 if (gs->interpreter_input_id != 0) {
 792                         gdk_input_remove(gs->interpreter_input_id);
 793                         gs->interpreter_input_id = 0;
 794                 }
 795                 while (gs->ps_input) {
 796                         struct record_list *ps_old = gs->ps_input;
 797                         gs->ps_input = gs->ps_input->next;
 798                         if (ps_old->close && NULL != ps_old->fp)
 799                                 fclose (ps_old->fp);
 800                         g_free (ps_old);
 801                 }
 802         }
 803
 804         if (gs->interpreter_output >= 0) {
 805                 close (gs->interpreter_output);
 806                 gs->interpreter_output = -1;
 807                 if (gs->interpreter_output_id) {
 808                         gdk_input_remove (gs->interpreter_output_id);
 809                         gs->interpreter_output_id = 0;
 810                 }
 811         }
 812
 813         if (gs->interpreter_err >= 0) {
 814                 close (gs->interpreter_err);
 815                 gs->interpreter_err = -1;
 816                 if (gs->interpreter_error_id) {
 817                         gdk_input_remove (gs->interpreter_error_id);
 818                         gs->interpreter_error_id = 0;
 819                 }
 820         }
 821
 822         gs->busy = FALSE;
 823 }
 824
 825 /* If file exists and is a regular file then return its length, else -1 */
 826 static gint
 827 file_length (const gchar * filename)
 828 {
 829         struct stat stat_rec;
 830
 831         if (filename && (stat (filename, &stat_rec) == 0) && S_ISREG (stat_rec.st_mode))
 832                 return stat_rec.st_size;
 833         else
 834                 return -1;
 835 }
 836
 837 /* Test if file exists, is a regular file and its length is > 0 */
 838 static gboolean
 839 file_readable(const char *filename)
 840 {
 841         return (file_length (filename) > 0);
 842 }
 843
 844 /*
 845  * Decompress gs->gs_filename if necessary
 846  * Set gs->filename_unc to the name of the uncompressed file or NULL.
 847  * Error reporting via signal 'interpreter_message'
 848  * Return name of input file to use or NULL on error..
 849  */
 850 static gchar *
 851 check_filecompressed (PSDocument * gs)
 852 {
 853         FILE *file;
 854         gchar buf[1024];
 855         gchar *filename, *filename_unc, *filename_err, *cmdline;
 856         const gchar *cmd;
 857         int fd;
 858
 859         cmd = NULL;
 860
 861         if ((file = fopen(gs->gs_filename, "r")) &&
 862             (fread (buf, sizeof(gchar), 3, file) == 3)) {
 863                 if ((buf[0] == '\037') && ((buf[1] == '\235') || (buf[1] == '\213'))) {
 864                         /* file is gzipped or compressed */
 865                         cmd = gtk_gs_defaults_get_ungzip_cmd ();
 866                 } else if (strncmp (buf, "BZh", 3) == 0) {
 867                         /* file is compressed with bzip2 */
 868                         cmd = gtk_gs_defaults_get_unbzip2_cmd ();
 869                 }
 870         }
 871
 872         if (NULL != file)
 873                 fclose(file);
 874
 875         if (!cmd)
 876                 return gs->gs_filename;
 877
 878         /* do the decompression */
 879         filename = g_shell_quote (gs->gs_filename);
 880         filename_unc = g_strconcat (g_get_tmp_dir (), "/evinceXXXXXX", NULL);
 881         if ((fd = mkstemp (filename_unc)) < 0) {
 882                 g_free (filename_unc);
 883                 g_free (filename);
 884                 return NULL;
 885         }
 886         close (fd);
 887
 888         filename_err = g_strconcat (g_get_tmp_dir (), "/evinceXXXXXX", NULL);
 889         if ((fd = mkstemp(filename_err)) < 0) {
 890                 g_free (filename_err);
 891                 g_free (filename_unc);
 892                 g_free (filename);
 893                 return NULL;
 894         }
 895         close (fd);
 896
 897         cmdline = g_strdup_printf ("%s %s >%s 2>%s", cmd,
 898                                    filename, filename_unc, filename_err);
 899         if (system (cmdline) == 0 &&
 900             file_readable (filename_unc) &&
 901             file_length (filename_err) == 0) {
 902                 /* sucessfully uncompressed file */
 903                 gs->gs_filename_unc = filename_unc;
 904         } else {
 905                 /* report error */
 906                 g_snprintf (buf, 1024, _("Error while decompressing file %s:\n"),
 907                             gs->gs_filename);
 908                 interpreter_failed (gs, buf);
 909                 unlink (filename_unc);
 910                 g_free (filename_unc);
 911                 filename_unc = NULL;
 912         }
 913
 914         unlink (filename_err);
 915         g_free (filename_err);
 916         g_free (cmdline);
 917         g_free (filename);
 918
 919         return filename_unc;
 920 }
 921
 922 static gint
 923 ps_document_enable_interpreter(PSDocument *gs)
 924 {
 925         g_return_val_if_fail (PS_IS_DOCUMENT (gs), FALSE);
 926
 927         if (!gs->gs_filename)
 928                 return 0;
 929
 930         return start_interpreter (gs);
 931 }
 932
 933 static gboolean
 934 document_load (PSDocument *gs, const gchar *fname)
 935 {
 936         g_return_val_if_fail (PS_IS_DOCUMENT(gs), FALSE);
 937
 938         LOG ("Load the document");
 939
 940         if (fname == NULL) {
 941                 gs->gs_status = "";
 942                 return FALSE;
 943         }
 944
 945         /* prepare this document */
 946         gs->structured_doc = FALSE;
 947         gs->send_filename_to_gs = TRUE;
 948         gs->gs_filename = g_strdup (fname);
 949
 950         if ((gs->reading_from_pipe = (strcmp (fname, "-") == 0))) {
 951                 gs->send_filename_to_gs = FALSE;
 952         } else {
 953                 /*
 954                  * We need to make sure that the file is loadable/exists!
 955                  * otherwise we want to exit without loading new stuff...
 956                  */
 957                 gchar *filename = NULL;
 958
 959                 if (!file_readable(fname)) {
 960                         gchar buf[1024];
 961
 962                         g_snprintf (buf, 1024, _("Cannot open file %s.\n"), fname);
 963                         interpreter_failed (gs, buf);
 964                         gs->gs_status = _("File is not readable.");
 965                 } else {
 966                         filename = check_filecompressed(gs);
 967                 }
 968
 969                 if (!filename || (gs->gs_psfile = fopen(filename, "r")) == NULL) {
 970                         interpreter_failed (gs, NULL);
 971                         return FALSE;
 972                 }
 973
 974                 /* we grab the vital statistics!!! */
 975                 gs->doc = psscan(gs->gs_psfile, TRUE, filename);
 976
 977                 if ((!gs->doc->epsf && gs->doc->numpages > 0) ||
 978                     (gs->doc->epsf && gs->doc->numpages > 1)) {
 979                         gs->structured_doc = TRUE;
 980                         gs->send_filename_to_gs = FALSE;
 981                 }
 982         }
 983
 984         gs->gs_status = _("Document loaded.");
 985
 986         return TRUE;
 987 }
 988
 989 static gboolean
 990 ps_document_next_page (PSDocument *gs)
 991 {
 992         XEvent event;
 993
 994         LOG ("Make ghostscript render next page");
 995
 996         g_return_val_if_fail (PS_IS_DOCUMENT(gs), FALSE);
 997         g_return_val_if_fail (gs->interpreter_pid != 0, FALSE);
 998         g_return_val_if_fail (gs->busy != TRUE, FALSE);
 999
1000         gs->busy = TRUE;
1001
1002         event.xclient.type = ClientMessage;
1003         event.xclient.display = gdk_display;
1004         event.xclient.window = gs->message_window;
1005         event.xclient.message_type = gdk_x11_atom_to_xatom(gs_class->next_atom);
1006         event.xclient.format = 32;
1007
1008         gdk_error_trap_push ();
1009         XSendEvent (gdk_display, gs->message_window, FALSE, 0, &event);
1010         gdk_flush ();
1011         gdk_error_trap_pop ();
1012
1013         return TRUE;
1014 }
1015
1016 static gboolean
1017 render_page (PSDocument *gs, int page)
1018 {
1019         g_return_val_if_fail(gs != NULL, FALSE);
1020         g_return_val_if_fail(PS_IS_DOCUMENT(gs), FALSE);
1021
1022         if(!gs->gs_filename) {
1023                 return FALSE;
1024         }
1025
1026         if (gs->structured_doc && gs->doc) {
1027                 LOG ("It's a structured document, let's send one page to gs");
1028
1029                 if (is_interpreter_ready (gs)) {
1030                         ps_document_next_page (gs);
1031                 } else {
1032                         ps_document_enable_interpreter (gs);
1033                         send_ps (gs, gs->doc->beginprolog, gs->doc->lenprolog, FALSE);
1034                         send_ps (gs, gs->doc->beginsetup, gs->doc->lensetup, FALSE);
1035                 }
1036
1037                 send_ps (gs, gs->doc->pages[page].begin,
1038                          gs->doc->pages[page].len, FALSE);
1039         } else {
1040                 /* Unstructured document
1041                  *
1042                  * In the case of non structured documents,
1043                  * GS read the PS from the  actual file (via command
1044                  * line. Hence, ggv only send a signal next page.
1045                  * If ghostview is not running it is usually because
1046                  * the last page of the file was displayed. In that
1047                  * case, ggv restarts GS again and the first page is displayed.
1048                  */
1049
1050                 LOG ("It's an unstructured document, gs will just read the file");
1051
1052                 if (!is_interpreter_ready (gs)) {
1053                         ps_document_enable_interpreter(gs);
1054                 }
1055                 ps_document_next_page(gs);
1056         }
1057
1058         return TRUE;
1059 }
1060
1061 static gboolean
1062 ps_document_load (EvDocument  *document,
1063                   const char  *uri,
1064                   GError     **error)
1065 {
1066         gboolean result;
1067         char *filename;
1068
1069         filename = g_filename_from_uri (uri, NULL, error);
1070         if (!filename)
1071                 return FALSE;
1072
1073         result = document_load (PS_DOCUMENT (document), filename);
1074         if (!result) {
1075                 g_set_error (error, G_FILE_ERROR,
1076                              G_FILE_ERROR_FAILED,
1077                              "Failed to load document '%s'\n",
1078                              uri);
1079         }
1080
1081         g_free (filename);
1082
1083         return result;
1084 }
1085
1086 static gboolean
1087 save_page_list (PSDocument *document, int *page_list, const char *filename)
1088 {
1089         gboolean result = TRUE;
1090         GtkGSDocSink *sink = gtk_gs_doc_sink_new ();
1091         FILE *f;
1092         gchar *buf;
1093
1094         pscopydoc (sink, document->gs_filename, document->doc, page_list);
1095
1096         buf = gtk_gs_doc_sink_get_buffer (sink);
1097
1098         f = fopen (filename, "w");
1099         if (f) {
1100                 fputs (buf, f);
1101                 fclose (f);
1102         } else {
1103                 result = FALSE;
1104         }
1105
1106         g_free (buf);
1107         gtk_gs_doc_sink_free (sink);
1108         g_free (sink);
1109
1110         return result;
1111 }
1112
1113 static gboolean
1114 ps_document_save (EvDocument  *document,
1115                   const char  *uri,
1116                   GError     **error)
1117 {
1118         PSDocument *ps = PS_DOCUMENT (document);
1119         int *page_list;
1120         gboolean result;
1121         int i;
1122         char *filename;
1123
1124         filename = g_filename_from_uri (uri, NULL, error);
1125         if (!filename)
1126                 return FALSE;
1127
1128         page_list = g_new0 (int, ps->doc->numpages);
1129         for (i = 0; i < ps->doc->numpages; i++) {
1130                 page_list[i] = 1;
1131         }
1132
1133         result = save_page_list (ps, page_list, filename);
1134
1135         g_free (page_list);
1136         g_free (filename);
1137
1138         return result;
1139 }
1140
1141 static int
1142 ps_document_get_n_pages (EvDocument  *document)
1143 {
1144         PSDocument *ps = PS_DOCUMENT (document);
1145
1146         g_return_val_if_fail (ps != NULL, -1);
1147
1148         if (!ps->gs_filename || !ps->doc) {
1149                 return -1;
1150         }
1151
1152         return ps->structured_doc ? ps->doc->numpages : 1;
1153 }
1154
1155 static void
1156 ps_document_get_page_size (EvDocument   *document,
1157                            int           page,
1158                            double       *width,
1159                            double       *height)
1160 {
1161         PSDocument *gs = PS_DOCUMENT (document);
1162         int w, h;
1163         int urx, ury, llx, lly, orientation;
1164
1165         get_page_box (PS_DOCUMENT (document), page, &urx, &ury, &llx, &lly);
1166         orientation = get_page_orientation (PS_DOCUMENT (document), page);
1167
1168         switch (orientation) {
1169                 case GTK_GS_ORIENTATION_PORTRAIT:
1170                 case GTK_GS_ORIENTATION_UPSIDEDOWN:
1171                         w = (urx - llx) / 72.0 * get_xdpi (gs) + 0.5;
1172                         h = (ury - lly) / 72.0 * get_ydpi (gs) + 0.5;
1173                         break;
1174                 case GTK_GS_ORIENTATION_LANDSCAPE:
1175                 case GTK_GS_ORIENTATION_SEASCAPE:
1176                         w = (ury - lly) / 72.0 * get_xdpi (gs) + 0.5;
1177                         h = (urx - llx) / 72.0 * get_ydpi (gs) + 0.5;
1178                         break;
1179                 default:
1180                         w = h = 0;
1181                         g_assert_not_reached ();
1182                         break;
1183         }
1184
1185         if (width) {
1186                 *width = w;
1187         }
1188
1189         if (height) {
1190                 *height = h;
1191         }
1192 }
1193
1194 static gboolean
1195 ps_document_can_get_text (EvDocument *document)
1196 {
1197         return FALSE;
1198 }
1199
1200 static void
1201 ps_async_renderer_render_pixbuf (EvAsyncRenderer *renderer, int page, double scale)
1202 {
1203         PSDocument *gs = PS_DOCUMENT (renderer);
1204
1205         if (gs->pstarget == NULL) {
1206                 gs->target_window = gtk_window_new (GTK_WINDOW_POPUP);
1207                 gtk_widget_realize (gs->target_window);
1208                 gs->pstarget = gs->target_window->window;
1209
1210                 g_assert (gs->pstarget != NULL);
1211
1212                 g_signal_connect (gs->target_window, "event",
1213                                   G_CALLBACK (ps_document_widget_event),
1214                                   gs);
1215         }
1216
1217         setup_pixmap (gs, page, scale);
1218         setup_page (gs, page, scale);
1219
1220         render_page (gs, page);
1221 }
1222
1223 static EvDocumentInfo *
1224 ps_document_get_info (EvDocument *document)
1225 {
1226         EvDocumentInfo *info;
1227         PSDocument *ps = PS_DOCUMENT (document);
1228
1229         info = g_new0 (EvDocumentInfo, 1);
1230         info->fields_mask = EV_DOCUMENT_INFO_TITLE |
1231                             EV_DOCUMENT_INFO_FORMAT |
1232                             EV_DOCUMENT_INFO_CREATOR |
1233                             EV_DOCUMENT_INFO_N_PAGES;
1234         info->title = g_strdup (ps->doc->title);
1235         info->format = ps->doc->epsf ? g_strdup (_("Encapsulated PostScript"))
1236                                      : g_strdup (_("PostScript"));
1237         info->creator = g_strdup (ps->doc->creator);
1238         info->n_pages = ev_document_get_n_pages (document);
1239
1240         return info;
1241 }
1242
1243 static EvOrientation
1244 ps_document_get_orientation (EvDocument *document)
1245 {
1246         EvOrientation orientation;
1247         PSDocument *ps = PS_DOCUMENT (document);
1248
1249         g_return_val_if_fail (ps != NULL, EV_ORIENTATION_PORTRAIT);
1250
1251         switch (ps->orientation) {
1252                 case GTK_GS_ORIENTATION_PORTRAIT:
1253                         orientation = EV_ORIENTATION_PORTRAIT;
1254                         break;
1255                 case GTK_GS_ORIENTATION_LANDSCAPE:
1256                         orientation = EV_ORIENTATION_LANDSCAPE;
1257                         break;
1258                 case GTK_GS_ORIENTATION_UPSIDEDOWN:
1259                         orientation = EV_ORIENTATION_UPSIDEDOWN;
1260                         break;
1261                 case GTK_GS_ORIENTATION_SEASCAPE:
1262                         orientation = EV_ORIENTATION_SEASCAPE;
1263                         break;
1264                 default:
1265                         orientation = EV_ORIENTATION_PORTRAIT;
1266                         break;
1267         }
1268
1269         return orientation;
1270 }
1271
1272 static void
1273 ps_document_document_iface_init (EvDocumentIface *iface)
1274 {
1275         iface->load = ps_document_load;
1276         iface->save = ps_document_save;
1277         iface->can_get_text = ps_document_can_get_text;
1278         iface->get_n_pages = ps_document_get_n_pages;
1279         iface->get_page_size = ps_document_get_page_size;
1280         iface->get_info = ps_document_get_info;
1281         iface->get_orientation = ps_document_get_orientation;
1282 }
1283
1284 static void
1285 ps_async_renderer_iface_init (EvAsyncRendererIface *iface)
1286 {
1287         iface->render_pixbuf = ps_async_renderer_render_pixbuf;
1288 }
1289
1290 static void
1291 ps_document_ps_export_begin (EvPSExporter *exporter, const char *filename,
1292                              int first_page, int last_page,
1293                              double width, double height, gboolean duplex)
1294 {
1295         PSDocument *document = PS_DOCUMENT (exporter);
1296
1297         g_free (document->ps_export_pagelist);
1298
1299         document->ps_export_pagelist = g_new0 (int, document->doc->numpages);
1300         document->ps_export_filename = g_strdup (filename);
1301 }
1302
1303 static void
1304 ps_document_ps_export_do_page (EvPSExporter *exporter, EvRenderContext *rc)
1305 {
1306         PSDocument *document = PS_DOCUMENT (exporter);
1307
1308         document->ps_export_pagelist[rc->page] = 1;
1309 }
1310
1311 static void
1312 ps_document_ps_export_end (EvPSExporter *exporter)
1313 {
1314         PSDocument *document = PS_DOCUMENT (exporter);
1315
1316         save_page_list (document, document->ps_export_pagelist,
1317                         document->ps_export_filename);
1318
1319         g_free (document->ps_export_pagelist);
1320         g_free (document->ps_export_filename);
1321         document->ps_export_pagelist = NULL;
1322         document->ps_export_filename = NULL;
1323 }
1324
1325 static void
1326 ps_document_ps_exporter_iface_init (EvPSExporterIface *iface)
1327 {
1328         iface->begin = ps_document_ps_export_begin;
1329         iface->do_page = ps_document_ps_export_do_page;
1330         iface->end = ps_document_ps_export_end;
1331 }