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-file-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_file_exporter_iface_init    (EvFileExporterIface    *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_FILE_EXPORTER,
  96                                                         ps_document_file_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
 142 static void
 143 ps_document_dispose (GObject *object)
 144 {
 145         PSDocument *gs = PS_DOCUMENT (object);
 146
 147         g_return_if_fail (gs != NULL);
 148
 149         if (gs->gs_psfile) {
 150                 fclose (gs->gs_psfile);
 151                 gs->gs_psfile = NULL;
 152         }
 153
 154         if (gs->gs_filename) {
 155                 g_free (gs->gs_filename);
 156                 gs->gs_filename = NULL;
 157         }
 158
 159         if (gs->doc) {
 160                 psfree (gs->doc);
 161                 gs->doc = NULL;
 162         }
 163
 164         if (gs->gs_filename_unc) {
 165                 unlink(gs->gs_filename_unc);
 166                 g_free(gs->gs_filename_unc);
 167                 gs->gs_filename_unc = NULL;
 168         }
 169
 170         if (gs->bpixmap) {
 171                 gdk_drawable_unref (gs->bpixmap);
 172         }
 173
 174         if(gs->input_buffer) {
 175                 g_free(gs->input_buffer);
 176                 gs->input_buffer = NULL;
 177         }
 178
 179         if (gs->target_window) {
 180                 gtk_widget_destroy (gs->target_window);
 181                 gs->target_window = NULL;
 182                 gs->pstarget = NULL;
 183         }
 184
 185         stop_interpreter (gs);
 186
 187         G_OBJECT_CLASS (parent_class)->dispose (object);
 188 }
 189
 190 static void
 191 ps_document_class_init(PSDocumentClass *klass)
 192 {
 193         GObjectClass *object_class;
 194
 195         object_class = (GObjectClass *) klass;
 196         parent_class = g_type_class_peek_parent (klass);
 197         gs_class = klass;
 198
 199         object_class->dispose = ps_document_dispose;
 200
 201         klass->gs_atom = gdk_atom_intern ("GHOSTVIEW", FALSE);
 202         klass->next_atom = gdk_atom_intern ("NEXT", FALSE);
 203         klass->page_atom = gdk_atom_intern ("PAGE", FALSE);
 204         klass->string_atom = gdk_atom_intern ("STRING", FALSE);
 205 }
 206
 207 static void
 208 push_pixbuf (PSDocument *gs)
 209 {
 210         GdkColormap *cmap;
 211         GdkPixbuf *pixbuf;
 212         int width, height;
 213
 214         if (gs->pstarget == NULL)
 215                 return;
 216
 217         cmap = gdk_window_get_colormap (gs->pstarget);
 218         gdk_drawable_get_size (gs->bpixmap, &width, &height);
 219         LOG ("Get from drawable\n");
 220         pixbuf =  gdk_pixbuf_get_from_drawable (NULL, gs->bpixmap, cmap,
 221                                                 0, 0, 0, 0,
 222                                                 width, height);
 223         LOG ("Get from drawable done\n");
 224         g_signal_emit_by_name (gs, "render_finished", pixbuf);
 225         g_object_unref (pixbuf);
 226 }
 227
 228 static void
 229 interpreter_failed (PSDocument *gs, char *msg)
 230 {
 231         LOG ("Interpreter failed %s", msg);
 232
 233         push_pixbuf (gs);
 234
 235         stop_interpreter (gs);
 236 }
 237
 238 static gboolean
 239 ps_document_widget_event (GtkWidget *widget, GdkEvent *event, gpointer data)
 240 {
 241         PSDocument *gs = (PSDocument *) data;
 242
 243         if(event->type != GDK_CLIENT_EVENT)
 244                 return FALSE;
 245
 246         gs->message_window = event->client.data.l[0];
 247
 248         if (event->client.message_type == gs_class->page_atom) {
 249                 LOG ("GS rendered the document");
 250                 gs->busy = FALSE;
 251
 252                 push_pixbuf (gs);
 253                 LOG ("Pixbuf pushed");
 254         }
 255
 256         return TRUE;
 257 }
 258
 259 static void
 260 send_ps (PSDocument *gs, long begin, unsigned int len, gboolean close)
 261 {
 262         struct record_list *ps_new;
 263
 264         if (gs->interpreter_input < 0) {
 265                 g_critical("No pipe to gs: error in send_ps().");
 266                 return;
 267         }
 268
 269         ps_new = g_new0 (struct record_list, 1);
 270         ps_new->fp = gs->gs_psfile;
 271         ps_new->begin = begin;
 272         ps_new->len = len;
 273         ps_new->seek_needed = TRUE;
 274         ps_new->close = close;
 275         ps_new->next = NULL;
 276
 277         if (gs->input_buffer == NULL) {
 278                 gs->input_buffer = g_malloc(MAX_BUFSIZE);
 279         }
 280
 281         if (gs->ps_input == NULL) {
 282                 gs->input_buffer_ptr = gs->input_buffer;
 283                 gs->bytes_left = len;
 284                 gs->buffer_bytes_left = 0;
 285                 gs->ps_input = ps_new;
 286                 gs->interpreter_input_id = gdk_input_add
 287                         (gs->interpreter_input, GDK_INPUT_WRITE, input, gs);
 288         } else {
 289                 struct record_list *p = gs->ps_input;
 290                 while (p->next != NULL) {
 291                         p = p->next;
 292                 }
 293                 p->next = ps_new;
 294         }
 295 }
 296
 297 static float
 298 get_xdpi (PSDocument *gs)
 299 {
 300         return 25.4 * gdk_screen_width() / gdk_screen_width_mm();
 301 }
 302
 303 static float
 304 get_ydpi (PSDocument *gs)
 305 {
 306         return 25.4 * gdk_screen_height() / gdk_screen_height_mm();
 307 }
 308
 309 static void
 310 setup_pixmap (PSDocument *gs, int page, double scale, int rotation)
 311 {
 312         GdkGC *fill;
 313         GdkColor white = { 0, 0xFFFF, 0xFFFF, 0xFFFF };   /* pixel, r, g, b */
 314         GdkColormap *colormap;
 315         double width, height;
 316         int pixmap_width, pixmap_height;
 317
 318         if (gs->pstarget == NULL)
 319                 return;
 320
 321         ev_document_get_page_size (EV_DOCUMENT (gs), page, &width, &height);
 322
 323         if (rotation == 90 || rotation == 270) {
 324                 pixmap_height = width * scale + 0.5;
 325                 pixmap_width = height * scale + 0.5;
 326         } else {
 327                 pixmap_width = width * scale + 0.5;
 328                 pixmap_height = height * scale + 0.5;
 329         }
 330
 331         if(gs->bpixmap) {
 332                 int w, h;
 333
 334                 gdk_drawable_get_size (gs->bpixmap, &w, &h);
 335
 336                 if (pixmap_width != w || h != pixmap_height) {
 337                         gdk_drawable_unref (gs->bpixmap);
 338                         gs->bpixmap = NULL;
 339                         stop_interpreter (gs);
 340                 }
 341         }
 342
 343         if (!gs->bpixmap) {
 344                 LOG ("Create pixmap");
 345
 346                 fill = gdk_gc_new (gs->pstarget);
 347                 colormap = gdk_drawable_get_colormap (gs->pstarget);
 348                 gdk_color_alloc (colormap, &white);
 349                 gdk_gc_set_foreground (fill, &white);
 350                 gs->bpixmap = gdk_pixmap_new (gs->pstarget, pixmap_width,
 351                                               pixmap_height, -1);
 352                 gdk_draw_rectangle (gs->bpixmap, fill, TRUE,
 353                                     0, 0, pixmap_width, pixmap_height);
 354         }
 355 }
 356
 357 #define DEFAULT_PAGE_SIZE 1
 358
 359 static void
 360 get_page_box (PSDocument *gs, int page, int *urx, int *ury, int *llx, int *lly)
 361 {
 362         gint new_llx = 0;
 363         gint new_lly = 0;
 364         gint new_urx = 0;
 365         gint new_ury = 0;
 366         GtkGSPaperSize *papersizes = gtk_gs_defaults_get_paper_sizes ();
 367         int new_pagesize = -1;
 368
 369         g_return_if_fail (PS_IS_DOCUMENT (gs));
 370
 371         if (new_pagesize == -1) {
 372                 new_pagesize = DEFAULT_PAGE_SIZE;
 373                 if (gs->doc) {
 374                 /* If we have a document:
 375                  * We use -- the page size (if specified)
 376                  * or the doc. size (if specified)
 377                  * or the page bbox (if specified)
 378                  * or the bounding box
 379                  */
 380                         if ((page >= 0) && (gs->doc->numpages > page) &&
 381                             (gs->doc->pages) && (gs->doc->pages[page].size)) {
 382                                 new_pagesize = gs->doc->pages[page].size - gs->doc->size;
 383                         } else if (gs->doc->default_page_size != NULL) {
 384                                 new_pagesize = gs->doc->default_page_size - gs->doc->size;
 385                         } else if ((page >= 0) &&
 386                                    (gs->doc->numpages > page) &&
 387                                    (gs->doc->pages) &&
 388                                    (gs->doc->pages[page].boundingbox[URX] >
 389                                     gs->doc->pages[page].boundingbox[LLX]) &&
 390                                    (gs->doc->pages[page].boundingbox[URY] >
 391                                     gs->doc->pages[page].boundingbox[LLY])) {
 392                                 new_pagesize = -1;
 393                         } else if ((gs->doc->boundingbox[URX] > gs->doc->boundingbox[LLX]) &&
 394                                    (gs->doc->boundingbox[URY] > gs->doc->boundingbox[LLY])) {
 395                                 new_pagesize = -1;
 396                         }
 397                 }
 398         }
 399
 400         /* Compute bounding box */
 401         if (gs->doc && (gs->doc->epsf || new_pagesize == -1)) {    /* epsf or bbox */
 402                 if ((page >= 0) &&
 403                     (gs->doc->pages) &&
 404                     (gs->doc->pages[page].boundingbox[URX] >
 405                      gs->doc->pages[page].boundingbox[LLX]) &&
 406                     (gs->doc->pages[page].boundingbox[URY] >
 407                      gs->doc->pages[page].boundingbox[LLY])) {
 408                         /* use page bbox */
 409                         new_llx = gs->doc->pages[page].boundingbox[LLX];
 410                         new_lly = gs->doc->pages[page].boundingbox[LLY];
 411                         new_urx = gs->doc->pages[page].boundingbox[URX];
 412                         new_ury = gs->doc->pages[page].boundingbox[URY];
 413                 } else if ((gs->doc->boundingbox[URX] > gs->doc->boundingbox[LLX]) &&
 414                            (gs->doc->boundingbox[URY] > gs->doc->boundingbox[LLY])) {
 415                         /* use doc bbox */
 416                         new_llx = gs->doc->boundingbox[LLX];
 417                         new_lly = gs->doc->boundingbox[LLY];
 418                         new_urx = gs->doc->boundingbox[URX];
 419                         new_ury = gs->doc->boundingbox[URY];
 420                 }
 421         } else {
 422                 if (new_pagesize < 0)
 423                         new_pagesize = DEFAULT_PAGE_SIZE;
 424                 new_llx = new_lly = 0;
 425                 if (gs->doc && gs->doc->size &&
 426                     (new_pagesize < gs->doc->numsizes)) {
 427                         new_urx = gs->doc->size[new_pagesize].width;
 428                         new_ury = gs->doc->size[new_pagesize].height;
 429                 } else {
 430                         new_urx = papersizes[new_pagesize].width;
 431                         new_ury = papersizes[new_pagesize].height;
 432                 }
 433         }
 434
 435         if (new_urx <= new_llx)
 436                 new_urx = papersizes[12].width;
 437         if (new_ury <= new_lly)
 438                 new_ury = papersizes[12].height;
 439
 440         *urx = new_urx;
 441         *ury = new_ury;
 442         *llx = new_llx;
 443         *lly = new_lly;
 444 }
 445
 446 static void
 447 setup_page (PSDocument *gs, int page, double scale, int rotation)
 448 {
 449         gchar *buf;
 450         char scaled_xdpi[G_ASCII_DTOSTR_BUF_SIZE];
 451         char scaled_ydpi[G_ASCII_DTOSTR_BUF_SIZE];
 452         int urx, ury, llx, lly;
 453
 454         LOG ("Setup the page");
 455
 456         get_page_box (gs, page, &urx, &ury, &llx, &lly);
 457         g_ascii_dtostr (scaled_xdpi, G_ASCII_DTOSTR_BUF_SIZE, get_xdpi (gs) * scale);
 458         g_ascii_dtostr (scaled_ydpi, G_ASCII_DTOSTR_BUF_SIZE, get_ydpi (gs) * scale);
 459
 460         buf = g_strdup_printf ("%ld %d %d %d %d %d %s %s %d %d %d %d",
 461                                0L, rotation, llx, lly, urx, ury,
 462                                scaled_xdpi, scaled_ydpi,
 463                                0, 0, 0, 0);
 464         LOG ("GS property %s", buf);
 465
 466         gdk_property_change (gs->pstarget, gs_class->gs_atom, gs_class->string_atom,
 467                              8, GDK_PROP_MODE_REPLACE, (guchar *)buf, strlen(buf));
 468         g_free (buf);
 469
 470         gdk_flush ();
 471 }
 472
 473 static void
 474 close_pipe (int p[2])
 475 {
 476         if (p[0] != -1) {
 477                 close (p[0]);
 478         }
 479         if (p[1] != -1) {
 480                 close (p[1]);
 481         }
 482 }
 483
 484 static gboolean
 485 is_interpreter_ready (PSDocument *gs)
 486 {
 487         return (gs->interpreter_pid != -1 && !gs->busy && gs->ps_input == NULL);
 488 }
 489
 490 static void
 491 output (gpointer data, gint source, GdkInputCondition condition)
 492 {
 493         char buf[MAX_BUFSIZE + 1];
 494         guint bytes = 0;
 495         PSDocument *gs = PS_DOCUMENT(data);
 496
 497         if (source == gs->interpreter_output) {
 498                 bytes = read(gs->interpreter_output, buf, MAX_BUFSIZE);
 499                 if (bytes == 0) {            /* EOF occurred */
 500                         close (gs->interpreter_output);
 501                         gs->interpreter_output = -1;
 502                         gdk_input_remove (gs->interpreter_output_id);
 503                         return;
 504                 } else if (bytes == -1) {
 505                         /* trouble... */
 506                         interpreter_failed (gs, NULL);
 507                         return;
 508                 }
 509                 if (gs->interpreter_err == -1) {
 510                         interpreter_failed (gs, NULL);
 511                 }
 512         } else if (source == gs->interpreter_err) {
 513                 bytes = read (gs->interpreter_err, buf, MAX_BUFSIZE);
 514                 if (bytes == 0) {            /* EOF occurred */
 515                         close (gs->interpreter_err);
 516                         gs->interpreter_err = -1;
 517                         gdk_input_remove (gs->interpreter_error_id);
 518                         return;
 519                 } else if (bytes == -1) {
 520                         /* trouble... */
 521                         interpreter_failed (gs, NULL);
 522                         return;
 523                 }
 524                 if (gs->interpreter_output == -1) {
 525                         interpreter_failed(gs, NULL);
 526                 }
 527         }
 528
 529         if (bytes > 0) {
 530                 buf[bytes] = '\0';
 531                 printf ("%s", buf);
 532         }
 533 }
 534
 535 static void
 536 catchPipe (int i)
 537 {
 538         broken_pipe = True;
 539 }
 540
 541 static void
 542 input(gpointer data, gint source, GdkInputCondition condition)
 543 {
 544         PSDocument *gs = PS_DOCUMENT(data);
 545         int bytes_written;
 546         void (*oldsig) (int);
 547         oldsig = signal(SIGPIPE, catchPipe);
 548
 549         LOG ("Input");
 550
 551         do {
 552                 if (gs->buffer_bytes_left == 0) {
 553                         /* Get a new section if required */
 554                         if (gs->ps_input && gs->bytes_left == 0) {
 555                                 struct record_list *ps_old = gs->ps_input;
 556                                 gs->ps_input = ps_old->next;
 557                                 if (ps_old->close && NULL != ps_old->fp)
 558                                         fclose (ps_old->fp);
 559                                 g_free (ps_old);
 560                         }
 561
 562                         /* Have to seek at the beginning of each section */
 563                         if (gs->ps_input && gs->ps_input->seek_needed) {
 564                                 fseek (gs->ps_input->fp, gs->ps_input->begin, SEEK_SET);
 565                                 gs->ps_input->seek_needed = FALSE;
 566                                 gs->bytes_left = gs->ps_input->len;
 567                         }
 568
 569                         if (gs->bytes_left > MAX_BUFSIZE) {
 570                                 gs->buffer_bytes_left = fread (gs->input_buffer, sizeof(char),
 571                                                                MAX_BUFSIZE, gs->ps_input->fp);
 572                         } else if (gs->bytes_left > 0) {
 573                                 gs->buffer_bytes_left = fread (gs->input_buffer, sizeof(char),
 574                                                                gs->bytes_left, gs->ps_input->fp);
 575                         } else {
 576                                 gs->buffer_bytes_left = 0;
 577                         }
 578                         if (gs->bytes_left > 0 && gs->buffer_bytes_left == 0) {
 579                                 interpreter_failed (gs, NULL); /* Error occurred */
 580                         }
 581                         gs->input_buffer_ptr = gs->input_buffer;
 582                         gs->bytes_left -= gs->buffer_bytes_left;
 583                 }
 584
 585                 if (gs->buffer_bytes_left > 0) {
 586                         bytes_written = write (gs->interpreter_input,
 587                                                gs->input_buffer_ptr, gs->buffer_bytes_left);
 588
 589                         if (broken_pipe) {
 590                                 interpreter_failed (gs, g_strdup(_("Broken pipe.")));
 591                                 broken_pipe = FALSE;
 592                                 interpreter_failed (gs, NULL);
 593                         } else if (bytes_written == -1) {
 594                                 if ((errno != EWOULDBLOCK) && (errno != EAGAIN)) {
 595                                         interpreter_failed (gs, NULL);   /* Something bad happened */
 596                                 }
 597                                 } else {
 598                                 gs->buffer_bytes_left -= bytes_written;
 599                                 gs->input_buffer_ptr += bytes_written;
 600                         }
 601                 }
 602         } while (gs->ps_input && gs->buffer_bytes_left == 0);
 603
 604         signal (SIGPIPE, oldsig);
 605
 606         if (gs->ps_input == NULL && gs->buffer_bytes_left == 0) {
 607                 if (gs->interpreter_input_id != 0) {
 608                         gdk_input_remove (gs->interpreter_input_id);
 609                         gs->interpreter_input_id = 0;
 610                 }
 611         }
 612 }
 613
 614 static int
 615 start_interpreter (PSDocument *gs)
 616 {
 617         int std_in[2] = { -1, -1 };   /* pipe to interp stdin */
 618         int std_out[2];               /* pipe from interp stdout */
 619         int std_err[2];               /* pipe from interp stderr */
 620
 621 #define NUM_ARGS    100
 622 #define NUM_GS_ARGS (NUM_ARGS - 20)
 623 #define NUM_ALPHA_ARGS 10
 624
 625         char *argv[NUM_ARGS], *dir, *gv_env, *gs_path;
 626         char **gs_args, **alpha_args = NULL;
 627         int argc = 0, i;
 628
 629         LOG ("Start the interpreter");
 630
 631         if(!gs->gs_filename)
 632                 return 0;
 633
 634         stop_interpreter(gs);
 635
 636         /* set up the args... */
 637         gs_path = g_find_program_in_path ("gs");
 638         gs_args = g_strsplit (gs_path, " ", NUM_GS_ARGS);
 639         g_free (gs_path);
 640         for(i = 0; i < NUM_GS_ARGS && gs_args[i]; i++, argc++) {
 641                 argv[argc] = gs_args[i];
 642         }
 643
 644         alpha_args = g_strsplit (ALPHA_PARAMS, " ", NUM_ALPHA_ARGS);
 645         for(i = 0; i < NUM_ALPHA_ARGS && alpha_args[i]; i++, argc++) {
 646                 argv[argc] = alpha_args[i];
 647         }
 648
 649         argv[argc++] = "-dNOPAUSE";
 650         argv[argc++] = "-dQUIET";
 651         argv[argc++] = "-dSAFER";
 652
 653         /* set up the pipes */
 654         if (gs->send_filename_to_gs) {
 655                 argv[argc++] = PS_DOCUMENT_GET_PS_FILE (gs);
 656                 argv[argc++] = "-c";
 657                 argv[argc++] = "quit";
 658         } else {
 659                 argv[argc++] = "-";
 660         }
 661
 662         argv[argc++] = NULL;
 663
 664         if (!gs->reading_from_pipe && !gs->send_filename_to_gs) {
 665                 if (pipe (std_in) == -1) {
 666                         g_critical ("Unable to open pipe to Ghostscript.");
 667                         return -1;
 668                 }
 669         }
 670
 671         if (pipe (std_out) == -1) {
 672                 close_pipe (std_in);
 673                 return -1;
 674         }
 675
 676         if (pipe(std_err) == -1) {
 677                 close_pipe (std_in);
 678                 close_pipe (std_out);
 679                 return -1;
 680         }
 681
 682         gv_env = g_strdup_printf ("GHOSTVIEW=%ld %ld",
 683                                   gdk_x11_drawable_get_xid (gs->pstarget),
 684                                   gdk_x11_drawable_get_xid (gs->bpixmap));
 685         LOG ("Launching ghostview with env %s", gv_env);
 686
 687         gs->interpreter_pid = fork ();
 688         switch (gs->interpreter_pid) {
 689                 case -1:                     /* error */
 690                         close_pipe (std_in);
 691                         close_pipe (std_out);
 692                         close_pipe (std_err);
 693                         return -2;
 694                         break;
 695                 case 0:                      /* child */
 696                         close (std_out[0]);
 697                         dup2 (std_out[1], 1);
 698                         close (std_out[1]);
 699
 700                         close (std_err[0]);
 701                         dup2 (std_err[1], 2);
 702                         close (std_err[1]);
 703
 704                         if (!gs->reading_from_pipe) {
 705                                 if (gs->send_filename_to_gs) {
 706                                         int stdinfd;
 707                                         /* just in case gs tries to read from stdin */
 708                                         stdinfd = open("/dev/null", O_RDONLY);
 709                                         if (stdinfd != 0) {
 710                                                 dup2(stdinfd, 0);
 711                                                 close(stdinfd);
 712                                         }
 713                                 } else {
 714                                         close (std_in[1]);
 715                                         dup2 (std_in[0], 0);
 716                                         close (std_in[0]);
 717                                 }
 718                         }
 719
 720                         putenv(gv_env);
 721
 722                         /* change to directory where the input file is. This helps
 723                          * with postscript-files which include other files using
 724                          * a relative path */
 725                         dir = g_path_get_dirname (gs->gs_filename);
 726                         chdir (dir);
 727                         g_free (dir);
 728
 729                         execvp (argv[0], argv);
 730
 731                         /* Notify error */
 732                         g_critical ("Unable to execute [%s]\n", argv[0]);
 733                         g_strfreev (gs_args);
 734                         g_free (gv_env);
 735                         g_strfreev (alpha_args);
 736                         _exit (1);
 737                         break;
 738                 default:                     /* parent */
 739                         if (!gs->send_filename_to_gs && !gs->reading_from_pipe) {
 740                                 int result;
 741                                 close (std_in[0]);
 742                                 /* use non-blocking IO for pipe to ghostscript */
 743                                 result = fcntl (std_in[1], F_GETFL, 0);
 744                                 fcntl (std_in[1], F_SETFL, result | O_NONBLOCK);
 745                                 gs->interpreter_input = std_in[1];
 746                         } else {
 747                                 gs->interpreter_input = -1;
 748                         }
 749                         close (std_out[1]);
 750
 751                         gs->interpreter_output = std_out[0];
 752                         close (std_err[1]);
 753                         gs->interpreter_err = std_err[0];
 754                         gs->interpreter_output_id =
 755                                 gdk_input_add (std_out[0], GDK_INPUT_READ, output, gs);
 756                         gs->interpreter_error_id =
 757                                 gdk_input_add (std_err[0], GDK_INPUT_READ, output, gs);
 758                         break;
 759         }
 760
 761         return TRUE;
 762 }
 763
 764 static void
 765 stop_interpreter(PSDocument * gs)
 766 {
 767         if (gs->interpreter_pid > 0) {
 768                 int status = 0;
 769                 LOG ("Stop the interpreter");
 770                 kill (gs->interpreter_pid, SIGTERM);
 771                 while ((wait(&status) == -1) && (errno == EINTR));
 772                 gs->interpreter_pid = -1;
 773                 if (status == 1) {
 774                         gs->gs_status = _("Interpreter failed.");
 775                 }
 776         }
 777
 778         if (gs->interpreter_input >= 0) {
 779                 close (gs->interpreter_input);
 780                 gs->interpreter_input = -1;
 781                 if (gs->interpreter_input_id != 0) {
 782                         gdk_input_remove(gs->interpreter_input_id);
 783                         gs->interpreter_input_id = 0;
 784                 }
 785                 while (gs->ps_input) {
 786                         struct record_list *ps_old = gs->ps_input;
 787                         gs->ps_input = gs->ps_input->next;
 788                         if (ps_old->close && NULL != ps_old->fp)
 789                                 fclose (ps_old->fp);
 790                         g_free (ps_old);
 791                 }
 792         }
 793
 794         if (gs->interpreter_output >= 0) {
 795                 close (gs->interpreter_output);
 796                 gs->interpreter_output = -1;
 797                 if (gs->interpreter_output_id) {
 798                         gdk_input_remove (gs->interpreter_output_id);
 799                         gs->interpreter_output_id = 0;
 800                 }
 801         }
 802
 803         if (gs->interpreter_err >= 0) {
 804                 close (gs->interpreter_err);
 805                 gs->interpreter_err = -1;
 806                 if (gs->interpreter_error_id) {
 807                         gdk_input_remove (gs->interpreter_error_id);
 808                         gs->interpreter_error_id = 0;
 809                 }
 810         }
 811
 812         gs->busy = FALSE;
 813 }
 814
 815 /* If file exists and is a regular file then return its length, else -1 */
 816 static gint
 817 file_length (const gchar * filename)
 818 {
 819         struct stat stat_rec;
 820
 821         if (filename && (stat (filename, &stat_rec) == 0) && S_ISREG (stat_rec.st_mode))
 822                 return stat_rec.st_size;
 823         else
 824                 return -1;
 825 }
 826
 827 /* Test if file exists, is a regular file and its length is > 0 */
 828 static gboolean
 829 file_readable(const char *filename)
 830 {
 831         return (file_length (filename) > 0);
 832 }
 833
 834 /*
 835  * Decompress gs->gs_filename if necessary
 836  * Set gs->filename_unc to the name of the uncompressed file or NULL.
 837  * Error reporting via signal 'interpreter_message'
 838  * Return name of input file to use or NULL on error..
 839  */
 840 static gchar *
 841 check_filecompressed (PSDocument * gs)
 842 {
 843         FILE *file;
 844         gchar buf[1024];
 845         gchar *filename, *filename_unc, *filename_err, *cmdline;
 846         const gchar *cmd;
 847         int fd;
 848
 849         cmd = NULL;
 850
 851         if ((file = fopen(gs->gs_filename, "r")) &&
 852             (fread (buf, sizeof(gchar), 3, file) == 3)) {
 853                 if ((buf[0] == '\037') && ((buf[1] == '\235') || (buf[1] == '\213'))) {
 854                         /* file is gzipped or compressed */
 855                         cmd = gtk_gs_defaults_get_ungzip_cmd ();
 856                 } else if (strncmp (buf, "BZh", 3) == 0) {
 857                         /* file is compressed with bzip2 */
 858                         cmd = gtk_gs_defaults_get_unbzip2_cmd ();
 859                 }
 860         }
 861
 862         if (NULL != file)
 863                 fclose(file);
 864
 865         if (!cmd)
 866                 return gs->gs_filename;
 867
 868         /* do the decompression */
 869         filename = g_shell_quote (gs->gs_filename);
 870         filename_unc = g_strconcat (g_get_tmp_dir (), "/evinceXXXXXX", NULL);
 871         if ((fd = mkstemp (filename_unc)) < 0) {
 872                 g_free (filename_unc);
 873                 g_free (filename);
 874                 return NULL;
 875         }
 876         close (fd);
 877
 878         filename_err = g_strconcat (g_get_tmp_dir (), "/evinceXXXXXX", NULL);
 879         if ((fd = mkstemp(filename_err)) < 0) {
 880                 g_free (filename_err);
 881                 g_free (filename_unc);
 882                 g_free (filename);
 883                 return NULL;
 884         }
 885         close (fd);
 886
 887         cmdline = g_strdup_printf ("%s %s >%s 2>%s", cmd,
 888                                    filename, filename_unc, filename_err);
 889         if (system (cmdline) == 0 &&
 890             file_readable (filename_unc) &&
 891             file_length (filename_err) == 0) {
 892                 /* sucessfully uncompressed file */
 893                 gs->gs_filename_unc = filename_unc;
 894         } else {
 895                 gchar *filename_dsp;
 896                 gchar *msg;
 897
 898                 /* report error */
 899                 filename_dsp = g_filename_display_name (gs->gs_filename);
 900                 msg = g_strdup_printf (_("Error while decompressing file “%s”:\n"), filename_dsp);
 901                 g_free (filename_dsp);
 902
 903                 interpreter_failed (gs, msg);
 904                 g_free (msg);
 905                 unlink (filename_unc);
 906                 g_free (filename_unc);
 907                 filename_unc = NULL;
 908         }
 909
 910         unlink (filename_err);
 911         g_free (filename_err);
 912         g_free (cmdline);
 913         g_free (filename);
 914
 915         return filename_unc;
 916 }
 917
 918 static gint
 919 ps_document_enable_interpreter(PSDocument *gs)
 920 {
 921         g_return_val_if_fail (PS_IS_DOCUMENT (gs), FALSE);
 922
 923         if (!gs->gs_filename)
 924                 return 0;
 925
 926         return start_interpreter (gs);
 927 }
 928
 929 static gboolean
 930 document_load (PSDocument *gs, const gchar *fname)
 931 {
 932         g_return_val_if_fail (PS_IS_DOCUMENT(gs), FALSE);
 933
 934         LOG ("Load the document");
 935
 936         if (fname == NULL) {
 937                 gs->gs_status = "";
 938                 return FALSE;
 939         }
 940
 941         /* prepare this document */
 942         gs->structured_doc = FALSE;
 943         gs->send_filename_to_gs = TRUE;
 944         gs->gs_filename = g_strdup (fname);
 945
 946         if ((gs->reading_from_pipe = (strcmp (fname, "-") == 0))) {
 947                 gs->send_filename_to_gs = FALSE;
 948         } else {
 949                 /*
 950                  * We need to make sure that the file is loadable/exists!
 951                  * otherwise we want to exit without loading new stuff...
 952                  */
 953                 gchar *filename = NULL;
 954
 955                 if (!file_readable(fname)) {
 956                         gchar *filename_dsp;
 957                         gchar *msg;
 958
 959                         filename_dsp = g_filename_display_name (fname);
 960                         msg = g_strdup_printf (_("Cannot open file “%s”.\n"), filename_dsp);
 961                         g_free (filename_dsp);
 962
 963                         interpreter_failed (gs, msg);
 964                         g_free (msg);
 965                         gs->gs_status = _("File is not readable.");
 966                 } else {
 967                         filename = check_filecompressed(gs);
 968                 }
 969
 970                 if (!filename || (gs->gs_psfile = fopen(filename, "r")) == NULL) {
 971                         interpreter_failed (gs, NULL);
 972                         return FALSE;
 973                 }
 974
 975                 /* we grab the vital statistics!!! */
 976                 gs->doc = psscan(gs->gs_psfile, TRUE, filename);
 977
 978                 if ((!gs->doc->epsf && gs->doc->numpages > 0) ||
 979                     (gs->doc->epsf && gs->doc->numpages > 1)) {
 980                         gs->structured_doc = TRUE;
 981                         gs->send_filename_to_gs = FALSE;
 982                 }
 983         }
 984
 985         gs->gs_status = _("Document loaded.");
 986
 987         return TRUE;
 988 }
 989
 990 static gboolean
 991 ps_document_next_page (PSDocument *gs)
 992 {
 993         XEvent event;
 994
 995         LOG ("Make ghostscript render next page");
 996
 997         g_return_val_if_fail (PS_IS_DOCUMENT(gs), FALSE);
 998         g_return_val_if_fail (gs->interpreter_pid != 0, FALSE);
 999         g_return_val_if_fail (gs->busy != TRUE, FALSE);
1000
1001         gs->busy = TRUE;
1002
1003         event.xclient.type = ClientMessage;
1004         event.xclient.display = gdk_display;
1005         event.xclient.window = gs->message_window;
1006         event.xclient.message_type = gdk_x11_atom_to_xatom(gs_class->next_atom);
1007         event.xclient.format = 32;
1008
1009         gdk_error_trap_push ();
1010         XSendEvent (gdk_display, gs->message_window, FALSE, 0, &event);
1011         gdk_flush ();
1012         gdk_error_trap_pop ();
1013
1014         return TRUE;
1015 }
1016
1017 static gboolean
1018 render_page (PSDocument *gs, int page)
1019 {
1020         g_return_val_if_fail(gs != NULL, FALSE);
1021         g_return_val_if_fail(PS_IS_DOCUMENT(gs), FALSE);
1022
1023         if(!gs->gs_filename) {
1024                 return FALSE;
1025         }
1026
1027         if (gs->structured_doc && gs->doc) {
1028                 LOG ("It's a structured document, let's send one page to gs");
1029
1030                 if (is_interpreter_ready (gs)) {
1031                         ps_document_next_page (gs);
1032                 } else {
1033                         ps_document_enable_interpreter (gs);
1034                         send_ps (gs, gs->doc->beginprolog, gs->doc->lenprolog, FALSE);
1035                         send_ps (gs, gs->doc->beginsetup, gs->doc->lensetup, FALSE);
1036                 }
1037
1038                 send_ps (gs, gs->doc->pages[page].begin,
1039                          gs->doc->pages[page].len, FALSE);
1040         } else {
1041                 /* Unstructured document
1042                  *
1043                  * In the case of non structured documents,
1044                  * GS read the PS from the  actual file (via command
1045                  * line. Hence, ggv only send a signal next page.
1046                  * If ghostview is not running it is usually because
1047                  * the last page of the file was displayed. In that
1048                  * case, ggv restarts GS again and the first page is displayed.
1049                  */
1050
1051                 LOG ("It's an unstructured document, gs will just read the file");
1052
1053                 if (!is_interpreter_ready (gs)) {
1054                         ps_document_enable_interpreter(gs);
1055                 }
1056                 ps_document_next_page(gs);
1057         }
1058
1059         return TRUE;
1060 }
1061
1062 static gboolean
1063 ps_document_load (EvDocument  *document,
1064                   const char  *uri,
1065                   GError     **error)
1066 {
1067         char *filename;
1068         char *gs_path;
1069         gboolean result;
1070
1071         filename = g_filename_from_uri (uri, NULL, error);
1072         if (!filename)
1073                 return FALSE;
1074
1075         gs_path = g_find_program_in_path ("gs");
1076         if (!gs_path) {
1077                     gchar *filename_dsp;
1078                     filename_dsp = g_filename_display_name (filename);
1079                     g_set_error(error,
1080                                 G_FILE_ERROR,
1081                                 G_FILE_ERROR_NOENT,
1082                                 _("Failed to load document “%s”. Ghostscript interpreter was not found in path"),
1083                                 filename);
1084                     g_free (filename_dsp);
1085                     result = FALSE;
1086         } else {
1087                 result = document_load (PS_DOCUMENT (document), filename);
1088                 if (!result) {
1089                         gchar *filename_dsp;
1090                         filename_dsp = g_filename_display_name (filename);
1091
1092                         g_set_error (error, G_FILE_ERROR,
1093                                      G_FILE_ERROR_FAILED,
1094                                      _("Failed to load document “%s”"),
1095                                      filename_dsp);
1096                         g_free (filename_dsp);
1097                 }
1098                 g_free (gs_path);
1099         }
1100         g_free (filename);
1101
1102         return result;
1103 }
1104
1105 static gboolean
1106 save_document (PSDocument *document, const char *filename)
1107 {
1108         gboolean result = TRUE;
1109         GtkGSDocSink *sink = gtk_gs_doc_sink_new ();
1110         FILE *f, *src_file;
1111         gchar *buf;
1112
1113         src_file = fopen (PS_DOCUMENT_GET_PS_FILE(document), "r");
1114         if (src_file) {
1115                 struct stat stat_rec;
1116
1117                 if (stat (PS_DOCUMENT_GET_PS_FILE(document), &stat_rec) == 0) {
1118                         pscopy (src_file, sink, 0, stat_rec.st_size - 1);
1119                 }
1120
1121                 fclose (src_file);
1122         }
1123
1124         buf = gtk_gs_doc_sink_get_buffer (sink);
1125         if (buf == NULL) {
1126                 return FALSE;
1127         }
1128
1129         f = fopen (filename, "w");
1130         if (f) {
1131                 fputs (buf, f);
1132                 fclose (f);
1133         } else {
1134                 result = FALSE;
1135         }
1136
1137         g_free (buf);
1138         gtk_gs_doc_sink_free (sink);
1139         g_free (sink);
1140
1141         return result;
1142 }
1143
1144 static gboolean
1145 save_page_list (PSDocument *document, int *page_list, const char *filename)
1146 {
1147         gboolean result = TRUE;
1148         GtkGSDocSink *sink = gtk_gs_doc_sink_new ();
1149         FILE *f;
1150         gchar *buf;
1151
1152         pscopydoc (sink, PS_DOCUMENT_GET_PS_FILE(document),
1153                    document->doc, page_list);
1154
1155         buf = gtk_gs_doc_sink_get_buffer (sink);
1156
1157         f = fopen (filename, "w");
1158         if (f) {
1159                 fputs (buf, f);
1160                 fclose (f);
1161         } else {
1162                 result = FALSE;
1163         }
1164
1165         g_free (buf);
1166         gtk_gs_doc_sink_free (sink);
1167         g_free (sink);
1168
1169         return result;
1170 }
1171
1172 static gboolean
1173 ps_document_save (EvDocument  *document,
1174                   const char  *uri,
1175                   GError     **error)
1176 {
1177         PSDocument *ps = PS_DOCUMENT (document);
1178         gboolean result;
1179         char *filename;
1180
1181         filename = g_filename_from_uri (uri, NULL, error);
1182         if (!filename)
1183                 return FALSE;
1184
1185         result = save_document (ps, filename);
1186
1187         g_free (filename);
1188
1189         return result;
1190 }
1191
1192 static int
1193 ps_document_get_n_pages (EvDocument  *document)
1194 {
1195         PSDocument *ps = PS_DOCUMENT (document);
1196
1197         g_return_val_if_fail (ps != NULL, -1);
1198
1199         if (!ps->gs_filename || !ps->doc) {
1200                 return -1;
1201         }
1202
1203         return ps->structured_doc ? ps->doc->numpages : 1;
1204 }
1205
1206 static void
1207 ps_document_get_page_size (EvDocument   *document,
1208                            int           page,
1209                            double       *width,
1210                            double       *height)
1211 {
1212         PSDocument *gs = PS_DOCUMENT (document);
1213         int urx, ury, llx, lly;
1214
1215         get_page_box (PS_DOCUMENT (document), page, &urx, &ury, &llx, &lly);
1216
1217         if (width) {
1218                 *width = (urx - llx) / 72.0 * get_xdpi (gs) + 0.5;
1219         }
1220
1221         if (height) {
1222                 *height = (ury - lly) / 72.0 * get_ydpi (gs) + 0.5;
1223         }
1224 }
1225
1226 static gboolean
1227 ps_document_can_get_text (EvDocument *document)
1228 {
1229         return FALSE;
1230 }
1231
1232 static void
1233 ps_async_renderer_render_pixbuf (EvAsyncRenderer *renderer, int page, double scale, int rotation)
1234 {
1235         PSDocument *gs = PS_DOCUMENT (renderer);
1236
1237         if (gs->pstarget == NULL) {
1238                 gs->target_window = gtk_window_new (GTK_WINDOW_POPUP);
1239                 gtk_widget_realize (gs->target_window);
1240                 gs->pstarget = gs->target_window->window;
1241
1242                 g_assert (gs->pstarget != NULL);
1243
1244                 g_signal_connect (gs->target_window, "event",
1245                                   G_CALLBACK (ps_document_widget_event),
1246                                   gs);
1247         }
1248
1249         setup_pixmap (gs, page, scale, rotation);
1250         setup_page (gs, page, scale, rotation);
1251
1252         render_page (gs, page);
1253 }
1254
1255 static EvDocumentInfo *
1256 ps_document_get_info (EvDocument *document)
1257 {
1258         EvDocumentInfo *info;
1259         PSDocument *ps = PS_DOCUMENT (document);
1260
1261         info = g_new0 (EvDocumentInfo, 1);
1262         info->fields_mask = EV_DOCUMENT_INFO_TITLE |
1263                             EV_DOCUMENT_INFO_FORMAT |
1264                             EV_DOCUMENT_INFO_CREATOR |
1265                             EV_DOCUMENT_INFO_N_PAGES;
1266         info->title = g_strdup (ps->doc->title);
1267         info->format = ps->doc->epsf ? g_strdup (_("Encapsulated PostScript"))
1268                                      : g_strdup (_("PostScript"));
1269         info->creator = g_strdup (ps->doc->creator);
1270         info->n_pages = ev_document_get_n_pages (document);
1271
1272         return info;
1273 }
1274
1275 static void
1276 ps_document_document_iface_init (EvDocumentIface *iface)
1277 {
1278         iface->load = ps_document_load;
1279         iface->save = ps_document_save;
1280         iface->can_get_text = ps_document_can_get_text;
1281         iface->get_n_pages = ps_document_get_n_pages;
1282         iface->get_page_size = ps_document_get_page_size;
1283         iface->get_info = ps_document_get_info;
1284 }
1285
1286 static void
1287 ps_async_renderer_iface_init (EvAsyncRendererIface *iface)
1288 {
1289         iface->render_pixbuf = ps_async_renderer_render_pixbuf;
1290 }
1291
1292 static gboolean
1293 ps_document_file_exporter_format_supported (EvFileExporter      *exporter,
1294                                             EvFileExporterFormat format)
1295 {
1296         return (format == EV_FILE_FORMAT_PS);
1297 }
1298
1299 static void
1300 ps_document_file_exporter_begin (EvFileExporter      *exporter,
1301                                  EvFileExporterFormat format,
1302                                  const char          *filename,
1303                                  int                  first_page,
1304                                  int                  last_page,
1305                                  double               width,
1306                                  double               height,
1307                                  gboolean             duplex)
1308 {
1309         PSDocument *document = PS_DOCUMENT (exporter);
1310
1311         if (document->structured_doc) {
1312                 g_free (document->ps_export_pagelist);
1313
1314                 document->ps_export_pagelist = g_new0 (int, document->doc->numpages);
1315         }
1316
1317         document->ps_export_filename = g_strdup (filename);
1318 }
1319
1320 static void
1321 ps_document_file_exporter_do_page (EvFileExporter *exporter, EvRenderContext *rc)
1322 {
1323         PSDocument *document = PS_DOCUMENT (exporter);
1324
1325         if (document->structured_doc) {
1326                 document->ps_export_pagelist[rc->page] = 1;
1327         }
1328 }
1329
1330 static void
1331 ps_document_file_exporter_end (EvFileExporter *exporter)
1332 {
1333         PSDocument *document = PS_DOCUMENT (exporter);
1334
1335         if (!document->structured_doc) {
1336                 save_document (document, document->ps_export_filename);
1337         } else {
1338                 save_page_list (document, document->ps_export_pagelist,
1339                                 document->ps_export_filename);
1340                 g_free (document->ps_export_pagelist);
1341                 g_free (document->ps_export_filename);
1342                 document->ps_export_pagelist = NULL;
1343                 document->ps_export_filename = NULL;
1344         }
1345 }
1346
1347 static void
1348 ps_document_file_exporter_iface_init (EvFileExporterIface *iface)
1349 {
1350         iface->format_supported = ps_document_file_exporter_format_supported;
1351         iface->begin = ps_document_file_exporter_begin;
1352         iface->do_page = ps_document_file_exporter_do_page;
1353         iface->end = ps_document_file_exporter_end;
1354 }