Pileus Git - ~andy/gtk/blob - gtk/gtkprintoperation-unix.c

   1 /* GTK - The GIMP Toolkit
   2  * gtkprintoperation-unix.c: Print Operation Details for Unix
   3  *                           and Unix-like platforms
   4  * Copyright (C) 2006, Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include "config.h"
  23 #ifdef HAVE_UNISTD_H
  24 #include <unistd.h>
  25 #endif
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <string.h>
  29 #include <errno.h>
  30 #include <stdlib.h>
  31 #include <fcntl.h>
  32
  33 #include "gtkprintoperation-private.h"
  34 #include "gtkmarshal.h"
  35 #include "gtkmessagedialog.h"
  36
  37 #include <cairo-pdf.h>
  38 #include <cairo-ps.h>
  39 #include "gtkprivate.h"
  40 #include "gtkprintunixdialog.h"
  41 #include "gtkpagesetupunixdialog.h"
  42 #include "gtkprintbackend.h"
  43 #include "gtkprinter.h"
  44 #include "gtkprinter-private.h"
  45 #include "gtkprintjob.h"
  46 #include "gtklabel.h"
  47 #include "gtkintl.h"
  48 #include "gtkalias.h"
  49
  50 typedef struct
  51 {
  52   GtkWindow *parent;        /* just in case we need to throw error dialogs */
  53   GMainLoop *loop;
  54   gboolean data_sent;
  55
  56   /* Real printing (not preview) */
  57   GtkPrintJob *job;         /* the job we are sending to the printer */
  58   cairo_surface_t *surface;
  59   gulong job_status_changed_tag;
  60
  61
  62 } GtkPrintOperationUnix;
  63
  64 typedef struct _PrinterFinder PrinterFinder;
  65
  66 static void printer_finder_free (PrinterFinder *finder);
  67 static void find_printer        (const gchar   *printer,
  68                                  GFunc          func,
  69                                  gpointer       data);
  70
  71 static void
  72 unix_start_page (GtkPrintOperation *op,
  73                  GtkPrintContext   *print_context,
  74                  GtkPageSetup      *page_setup)
  75 {
  76   GtkPrintOperationUnix *op_unix;
  77   GtkPaperSize *paper_size;
  78   cairo_surface_type_t type;
  79   gdouble w, h;
  80
  81   op_unix = op->priv->platform_data;
  82
  83   paper_size = gtk_page_setup_get_paper_size (page_setup);
  84
  85   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
  86   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
  87
  88   type = cairo_surface_get_type (op_unix->surface);
  89
  90   if (type == CAIRO_SURFACE_TYPE_PS)
  91     cairo_ps_surface_set_size (op_unix->surface, w, h);
  92   else if (type == CAIRO_SURFACE_TYPE_PDF)
  93     cairo_pdf_surface_set_size (op_unix->surface, w, h);
  94 }
  95
  96 static void
  97 unix_end_page (GtkPrintOperation *op,
  98                GtkPrintContext   *print_context)
  99 {
 100   cairo_t *cr;
 101
 102   cr = gtk_print_context_get_cairo_context (print_context);
 103   cairo_show_page (cr);
 104 }
 105
 106 static void
 107 op_unix_free (GtkPrintOperationUnix *op_unix)
 108 {
 109   if (op_unix->job)
 110     {
 111       g_signal_handler_disconnect (op_unix->job,
 112                                    op_unix->job_status_changed_tag);
 113       g_object_unref (op_unix->job);
 114     }
 115
 116   g_free (op_unix);
 117 }
 118
 119 static gchar *
 120 shell_command_substitute_file (const gchar *cmd,
 121                                const gchar *filename)
 122 {
 123   const gchar *inptr, *start;
 124   gchar *result;
 125   GString *final;
 126
 127   g_return_val_if_fail (cmd != NULL, NULL);
 128   g_return_val_if_fail (filename != NULL, NULL);
 129
 130   result = NULL;
 131   final = g_string_new (NULL);
 132
 133   start = inptr = cmd;
 134
 135   while ((inptr = strchr (inptr, '%')) != NULL)
 136     {
 137       g_string_append_len (final, start, inptr - start);
 138       inptr++;
 139       switch (*inptr)
 140         {
 141           case 'f':
 142             g_string_append (final, filename ? filename : "");
 143             break;
 144
 145           case '%':
 146             g_string_append_c (final, '%');
 147             break;
 148
 149           default:
 150             g_string_append_c (final, '%');
 151             if (*inptr)
 152               g_string_append_c (final, *inptr);
 153             break;
 154         }
 155       if (*inptr)
 156         inptr++;
 157       start = inptr;
 158     }
 159   g_string_append (final, start);
 160
 161   result = final->str;
 162
 163   g_string_free (final, FALSE);
 164
 165   return result;
 166 }
 167
 168 void
 169 _gtk_print_operation_platform_backend_launch_preview (GtkPrintOperation *op,
 170                                                       cairo_surface_t   *surface,
 171                                                       GtkWindow         *parent,
 172                                                       const gchar       *filename)
 173 {
 174   gint argc;
 175   gchar **argv;
 176   gchar *cmd;
 177   gchar *preview_cmd;
 178   GtkSettings *settings;
 179   gchar *quoted_filename;
 180   GdkScreen *screen;
 181   GError *error = NULL;
 182
 183   cairo_surface_destroy (surface);
 184
 185   settings = gtk_settings_get_default ();
 186   g_object_get (settings, "gtk-print-preview-command", &preview_cmd, NULL);
 187
 188   quoted_filename = g_shell_quote (filename);
 189   cmd = shell_command_substitute_file (preview_cmd, quoted_filename);
 190   g_shell_parse_argv (cmd, &argc, &argv, &error);
 191
 192   if (error != NULL)
 193     goto out;
 194
 195   if (parent)
 196     screen = gtk_window_get_screen (parent);
 197   else
 198     screen = gdk_screen_get_default ();
 199
 200   gdk_spawn_on_screen (screen, NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, &error);
 201
 202  out:
 203   if (error != NULL)
 204     {
 205       GtkWidget *edialog;
 206       edialog = gtk_message_dialog_new (parent,
 207                                         GTK_DIALOG_DESTROY_WITH_PARENT,
 208                                         GTK_MESSAGE_ERROR,
 209                                         GTK_BUTTONS_CLOSE,
 210                                         _("Error launching preview") /* FIXME better text */);
 211       gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
 212                                                 "%s", error->message);
 213       gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
 214       g_signal_connect (edialog, "response",
 215                         G_CALLBACK (gtk_widget_destroy), NULL);
 216
 217       gtk_window_present (GTK_WINDOW (edialog));
 218
 219       g_error_free (error);
 220    }
 221
 222   g_free (cmd);
 223   g_free (quoted_filename);
 224   g_free (preview_cmd);
 225   g_strfreev (argv);
 226 }
 227
 228 static void
 229 unix_finish_send  (GtkPrintJob *job,
 230                    gpointer     user_data,
 231                    GError      *error)
 232 {
 233   GtkPrintOperationUnix *op_unix;
 234
 235   op_unix = (GtkPrintOperationUnix *) user_data;
 236
 237   if (error != NULL)
 238     {
 239       GtkWidget *edialog;
 240       edialog = gtk_message_dialog_new (op_unix->parent,
 241                                         GTK_DIALOG_DESTROY_WITH_PARENT,
 242                                         GTK_MESSAGE_ERROR,
 243                                         GTK_BUTTONS_CLOSE,
 244                                         _("Error printing") /* FIXME better text */);
 245       gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
 246                                                 "%s", error->message);
 247       gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
 248       g_signal_connect (edialog, "response",
 249                         G_CALLBACK (gtk_widget_destroy), NULL);
 250
 251       gtk_window_present (GTK_WINDOW (edialog));
 252     }
 253
 254   op_unix->data_sent = TRUE;
 255
 256   if (op_unix->loop)
 257     g_main_loop_quit (op_unix->loop);
 258 }
 259
 260 static void
 261 unix_end_run (GtkPrintOperation *op,
 262               gboolean           wait,
 263               gboolean           cancelled)
 264 {
 265   GtkPrintOperationUnix *op_unix = op->priv->platform_data;
 266
 267   cairo_surface_finish (op_unix->surface);
 268
 269   if (cancelled)
 270     return;
 271
 272   if (wait)
 273     op_unix->loop = g_main_loop_new (NULL, FALSE);
 274
 275   /* TODO: Check for error */
 276   if (op_unix->job != NULL)
 277     gtk_print_job_send (op_unix->job,
 278                         unix_finish_send,
 279                         op_unix, NULL);
 280
 281   if (wait)
 282     {
 283       g_object_ref (op);
 284       if (!op_unix->data_sent)
 285         {
 286           GDK_THREADS_LEAVE ();
 287           g_main_loop_run (op_unix->loop);
 288           GDK_THREADS_ENTER ();
 289         }
 290       g_main_loop_unref (op_unix->loop);
 291       op_unix->loop = NULL;
 292       g_object_unref (op);
 293     }
 294 }
 295
 296 static void
 297 job_status_changed_cb (GtkPrintJob       *job,
 298                        GtkPrintOperation *op)
 299 {
 300   _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 301 }
 302
 303
 304 static GtkWidget *
 305 get_print_dialog (GtkPrintOperation *op,
 306                   GtkWindow         *parent)
 307 {
 308   GtkPrintOperationPrivate *priv = op->priv;
 309   GtkWidget *pd, *label;
 310   GtkPageSetup *page_setup;
 311   const gchar *custom_tab_label;
 312
 313   pd = gtk_print_unix_dialog_new (NULL, parent);
 314
 315   gtk_print_unix_dialog_set_manual_capabilities (GTK_PRINT_UNIX_DIALOG (pd),
 316                                                  GTK_PRINT_CAPABILITY_PAGE_SET |
 317                                                  GTK_PRINT_CAPABILITY_COPIES |
 318                                                  GTK_PRINT_CAPABILITY_COLLATE |
 319                                                  GTK_PRINT_CAPABILITY_REVERSE |
 320                                                  GTK_PRINT_CAPABILITY_SCALE |
 321                                                  GTK_PRINT_CAPABILITY_PREVIEW);
 322
 323   if (priv->print_settings)
 324     gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG (pd),
 325                                         priv->print_settings);
 326   if (priv->default_page_setup)
 327     page_setup = gtk_page_setup_copy (priv->default_page_setup);
 328   else
 329     page_setup = gtk_page_setup_new ();
 330
 331   gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
 332                                         page_setup);
 333   g_object_unref (page_setup);
 334
 335   g_signal_emit_by_name (op, "create-custom-widget",
 336                          &priv->custom_widget);
 337
 338   if (priv->custom_widget)
 339     {
 340       custom_tab_label = priv->custom_tab_label;
 341
 342       if (custom_tab_label == NULL)
 343         {
 344           custom_tab_label = g_get_application_name ();
 345           if (custom_tab_label == NULL)
 346             custom_tab_label = _("Application");
 347         }
 348
 349       label = gtk_label_new (custom_tab_label);
 350
 351       gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
 352                                             priv->custom_widget, label);
 353     }
 354
 355   return pd;
 356 }
 357
 358 typedef struct
 359 {
 360   GtkPrintOperation           *op;
 361   gboolean                     do_print;
 362   gboolean                     do_preview;
 363   GtkPrintOperationResult      result;
 364   GtkPrintOperationPrintFunc   print_cb;
 365   GDestroyNotify               destroy;
 366   GtkWindow                   *parent;
 367   GMainLoop                   *loop;
 368 } PrintResponseData;
 369
 370 static void
 371 print_response_data_free (gpointer data)
 372 {
 373   PrintResponseData *rdata = data;
 374
 375   g_object_unref (rdata->op);
 376   g_free (rdata);
 377 }
 378
 379 static void
 380 finish_print (PrintResponseData *rdata,
 381               GtkPrinter        *printer,
 382               GtkPageSetup      *page_setup,
 383               GtkPrintSettings  *settings)
 384 {
 385   GtkPrintOperation *op = rdata->op;
 386   GtkPrintOperationPrivate *priv = op->priv;
 387   GtkPrintJob *job;
 388
 389   if (rdata->do_print)
 390     {
 391       gtk_print_operation_set_print_settings (op, settings);
 392       priv->print_context = _gtk_print_context_new (op);
 393       _gtk_print_context_set_page_setup (priv->print_context, page_setup);
 394
 395       if (!rdata->do_preview)
 396         {
 397           GtkPrintOperationUnix *op_unix;
 398           cairo_t *cr;
 399
 400           op_unix = g_new0 (GtkPrintOperationUnix, 1);
 401           priv->platform_data = op_unix;
 402           priv->free_platform_data = (GDestroyNotify) op_unix_free;
 403           op_unix->parent = rdata->parent;
 404
 405           priv->start_page = unix_start_page;
 406           priv->end_page = unix_end_page;
 407           priv->end_run = unix_end_run;
 408
 409           job = gtk_print_job_new (priv->job_name, printer, settings, page_setup);
 410           op_unix->job = job;
 411           gtk_print_job_set_track_print_status (job, priv->track_print_status);
 412
 413           op_unix->surface = gtk_print_job_get_surface (job, &priv->error);
 414           if (op_unix->surface == NULL)
 415             {
 416               rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
 417               rdata->do_print = FALSE;
 418               goto out;
 419             }
 420
 421           cr = cairo_create (op_unix->surface);
 422           gtk_print_context_set_cairo_context (priv->print_context, cr, 72, 72);
 423           cairo_destroy (cr);
 424
 425           _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 426
 427           op_unix->job_status_changed_tag =
 428             g_signal_connect (job, "status-changed",
 429                               G_CALLBACK (job_status_changed_cb), op);
 430
 431           priv->print_pages = job->print_pages;
 432           priv->page_ranges = job->page_ranges;
 433           priv->num_page_ranges = job->num_page_ranges;
 434
 435           priv->manual_num_copies = job->num_copies;
 436           priv->manual_collation = job->collate;
 437           priv->manual_reverse = job->reverse;
 438           priv->manual_page_set = job->page_set;
 439           priv->manual_scale = job->scale;
 440           priv->manual_orientation = job->rotate_to_orientation;
 441         }
 442     }
 443  out:
 444   if (rdata->print_cb)
 445     rdata->print_cb (op, rdata->parent, rdata->do_print, rdata->result);
 446
 447   if (rdata->destroy)
 448     rdata->destroy (rdata);
 449 }
 450
 451 static void
 452 handle_print_response (GtkWidget *dialog,
 453                        gint       response,
 454                        gpointer   data)
 455 {
 456   GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
 457   PrintResponseData *rdata = data;
 458   GtkPrintSettings *settings = NULL;
 459   GtkPageSetup *page_setup = NULL;
 460   GtkPrinter *printer = NULL;
 461
 462   if (response == GTK_RESPONSE_OK)
 463     {
 464       printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
 465
 466       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 467       rdata->do_preview = FALSE;
 468       if (printer != NULL)
 469         rdata->do_print = TRUE;
 470     }
 471   else if (response == GTK_RESPONSE_APPLY)
 472     {
 473       /* print preview */
 474       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 475       rdata->do_preview = TRUE;
 476       rdata->do_print = TRUE;
 477
 478       rdata->op->priv->action = GTK_PRINT_OPERATION_ACTION_PREVIEW;
 479     }
 480
 481   if (rdata->do_print)
 482     {
 483       settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
 484       page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
 485
 486       g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
 487     }
 488
 489   finish_print (rdata, printer, page_setup, settings);
 490
 491   if (settings)
 492     g_object_unref (settings);
 493
 494   gtk_widget_destroy (GTK_WIDGET (pd));
 495
 496 }
 497
 498
 499 static void
 500 found_printer (GtkPrinter        *printer,
 501                PrintResponseData *rdata)
 502 {
 503   GtkPrintOperation *op = rdata->op;
 504   GtkPrintOperationPrivate *priv = op->priv;
 505   GtkPrintSettings *settings = NULL;
 506   GtkPageSetup *page_setup = NULL;
 507
 508   if (rdata->loop)
 509     g_main_loop_quit (rdata->loop);
 510
 511   if (printer != NULL)
 512     {
 513       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 514
 515       rdata->do_print = TRUE;
 516
 517       if (priv->print_settings)
 518         settings = gtk_print_settings_copy (priv->print_settings);
 519       else
 520         settings = gtk_print_settings_new ();
 521
 522       gtk_print_settings_set_printer (settings,
 523                                       gtk_printer_get_name (printer));
 524
 525       if (priv->default_page_setup)
 526         page_setup = gtk_page_setup_copy (priv->default_page_setup);
 527       else
 528         page_setup = gtk_page_setup_new ();
 529   }
 530
 531   finish_print (rdata, printer, page_setup, settings);
 532
 533   if (settings)
 534     g_object_unref (settings);
 535
 536   if (page_setup)
 537     g_object_unref (page_setup);
 538 }
 539
 540 void
 541 _gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
 542                                                         gboolean                    show_dialog,
 543                                                         GtkWindow                  *parent,
 544                                                         GtkPrintOperationPrintFunc  print_cb)
 545 {
 546   GtkWidget *pd;
 547   PrintResponseData *rdata;
 548   const gchar *printer_name;
 549
 550   rdata = g_new (PrintResponseData, 1);
 551   rdata->op = g_object_ref (op);
 552   rdata->do_print = FALSE;
 553   rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 554   rdata->print_cb = print_cb;
 555   rdata->parent = parent;
 556   rdata->loop = NULL;
 557   rdata->destroy = print_response_data_free;
 558
 559   if (show_dialog)
 560     {
 561       pd = get_print_dialog (op, parent);
 562       gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
 563
 564       g_signal_connect (pd, "response",
 565                         G_CALLBACK (handle_print_response), rdata);
 566
 567       gtk_window_present (GTK_WINDOW (pd));
 568     }
 569   else
 570     {
 571       printer_name = NULL;
 572       if (op->priv->print_settings)
 573         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 574
 575       find_printer (printer_name, (GFunc) found_printer, rdata);
 576     }
 577 }
 578
 579 static cairo_status_t
 580 write_preview (void                *closure,
 581                const unsigned char *data,
 582                unsigned int         length)
 583 {
 584   gint fd = GPOINTER_TO_INT (closure);
 585   gssize written;
 586
 587   while (length > 0)
 588     {
 589       written = write (fd, data, length);
 590
 591       if (written == -1)
 592         {
 593           if (errno == EAGAIN || errno == EINTR)
 594             continue;
 595
 596           return CAIRO_STATUS_WRITE_ERROR;
 597         }
 598
 599       data += written;
 600       length -= written;
 601     }
 602
 603   return CAIRO_STATUS_SUCCESS;
 604 }
 605
 606 static void
 607 close_preview (void *data)
 608 {
 609   gint fd = GPOINTER_TO_INT (data);
 610
 611   close (fd);
 612 }
 613
 614 cairo_surface_t *
 615 _gtk_print_operation_platform_backend_create_preview_surface (GtkPrintOperation *op,
 616                                                               GtkPageSetup      *page_setup,
 617                                                               gdouble           *dpi_x,
 618                                                               gdouble           *dpi_y,
 619                                                               gchar            **target)
 620 {
 621   gchar *filename;
 622   gint fd;
 623   GtkPaperSize *paper_size;
 624   gdouble w, h;
 625   cairo_surface_t *surface;
 626   static cairo_user_data_key_t key;
 627
 628   filename = g_build_filename (g_get_tmp_dir (), "previewXXXXXX.pdf", NULL);
 629   fd = g_mkstemp (filename);
 630   *target = filename;
 631
 632   g_print ("target is %s\n", filename);
 633
 634   paper_size = gtk_page_setup_get_paper_size (page_setup);
 635   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
 636   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
 637
 638   *dpi_x = *dpi_y = 72;
 639   surface = cairo_pdf_surface_create_for_stream (write_preview, GINT_TO_POINTER(fd), w, h);
 640
 641   cairo_surface_set_user_data (surface, &key, GINT_TO_POINTER (fd), close_preview);
 642
 643   return surface;
 644 }
 645
 646 void
 647 _gtk_print_operation_platform_backend_preview_start_page (GtkPrintOperation *op,
 648                                                           cairo_surface_t   *surface,
 649                                                           cairo_t           *cr)
 650 {
 651 }
 652
 653 void
 654 _gtk_print_operation_platform_backend_preview_end_page (GtkPrintOperation *op,
 655                                                         cairo_surface_t   *surface,
 656                                                         cairo_t           *cr)
 657 {
 658   cairo_show_page (cr);
 659 }
 660
 661 void
 662 _gtk_print_operation_platform_backend_resize_preview_surface (GtkPrintOperation *op,
 663                                                               GtkPageSetup      *page_setup,
 664                                                               cairo_surface_t   *surface)
 665 {
 666   GtkPaperSize *paper_size;
 667   gdouble w, h;
 668
 669   paper_size = gtk_page_setup_get_paper_size (page_setup);
 670   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
 671   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
 672   cairo_pdf_surface_set_size (surface, w, h);
 673 }
 674
 675
 676 GtkPrintOperationResult
 677 _gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
 678                                                   gboolean           show_dialog,
 679                                                   GtkWindow         *parent,
 680                                                   gboolean          *do_print)
 681  {
 682   GtkWidget *pd;
 683   PrintResponseData rdata;
 684   gint response;
 685   const gchar *printer_name;
 686
 687   rdata.op = op;
 688   rdata.do_print = FALSE;
 689   rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 690   rdata.print_cb = NULL;
 691   rdata.destroy = NULL;
 692   rdata.parent = parent;
 693   rdata.loop = NULL;
 694
 695   if (show_dialog)
 696     {
 697       pd = get_print_dialog (op, parent);
 698
 699       response = gtk_dialog_run (GTK_DIALOG (pd));
 700       handle_print_response (pd, response, &rdata);
 701     }
 702   else
 703     {
 704       printer_name = NULL;
 705       if (op->priv->print_settings)
 706         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 707
 708       rdata.loop = g_main_loop_new (NULL, FALSE);
 709       find_printer (printer_name,
 710                     (GFunc) found_printer, &rdata);
 711
 712       GDK_THREADS_LEAVE ();
 713       g_main_loop_run (rdata.loop);
 714       GDK_THREADS_ENTER ();
 715
 716       g_main_loop_unref (rdata.loop);
 717       rdata.loop = NULL;
 718     }
 719
 720   *do_print = rdata.do_print;
 721
 722   return rdata.result;
 723 }
 724
 725
 726 typedef struct
 727 {
 728   GtkPageSetup         *page_setup;
 729   GtkPageSetupDoneFunc  done_cb;
 730   gpointer              data;
 731   GDestroyNotify        destroy;
 732 } PageSetupResponseData;
 733
 734 static void
 735 page_setup_data_free (gpointer data)
 736 {
 737   PageSetupResponseData *rdata = data;
 738
 739   if (rdata->page_setup)
 740     g_object_unref (rdata->page_setup);
 741
 742   g_free (rdata);
 743 }
 744
 745 static void
 746 handle_page_setup_response (GtkWidget *dialog,
 747                             gint       response,
 748                             gpointer   data)
 749 {
 750   GtkPageSetupUnixDialog *psd;
 751   PageSetupResponseData *rdata = data;
 752
 753   psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
 754   if (response == GTK_RESPONSE_OK)
 755     rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
 756
 757   gtk_widget_destroy (dialog);
 758
 759   if (rdata->done_cb)
 760     rdata->done_cb (rdata->page_setup, rdata->data);
 761
 762   if (rdata->destroy)
 763     rdata->destroy (rdata);
 764 }
 765
 766 static GtkWidget *
 767 get_page_setup_dialog (GtkWindow        *parent,
 768                        GtkPageSetup     *page_setup,
 769                        GtkPrintSettings *settings)
 770 {
 771   GtkWidget *dialog;
 772
 773   dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
 774   if (page_setup)
 775     gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 776                                                page_setup);
 777   gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 778                                                  settings);
 779
 780   return dialog;
 781 }
 782
 783 /**
 784  * gtk_print_run_page_setup_dialog:
 785  * @parent: transient parent, or %NULL
 786  * @page_setup: an existing #GtkPageSetup, or %NULL
 787  * @settings: a #GtkPrintSettings
 788  *
 789  * Runs a page setup dialog, letting the user modify the values from
 790  * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
 791  * is identical to the passed in @page_setup, otherwise it contains the
 792  * modifications done in the dialog.
 793  *
 794  * Note that this function may use a recursive mainloop to show the page
 795  * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
 796  * a problem.
 797  *
 798  * Return value: a new #GtkPageSetup
 799  *
 800  * Since: 2.10
 801  */
 802 GtkPageSetup *
 803 gtk_print_run_page_setup_dialog (GtkWindow        *parent,
 804                                  GtkPageSetup     *page_setup,
 805                                  GtkPrintSettings *settings)
 806 {
 807   GtkWidget *dialog;
 808   gint response;
 809   PageSetupResponseData rdata;
 810
 811   rdata.page_setup = NULL;
 812   rdata.done_cb = NULL;
 813   rdata.data = NULL;
 814   rdata.destroy = NULL;
 815
 816   dialog = get_page_setup_dialog (parent, page_setup, settings);
 817   response = gtk_dialog_run (GTK_DIALOG (dialog));
 818   handle_page_setup_response (dialog, response, &rdata);
 819
 820   if (rdata.page_setup)
 821     return rdata.page_setup;
 822   else if (page_setup)
 823     return gtk_page_setup_copy (page_setup);
 824   else
 825     return gtk_page_setup_new ();
 826 }
 827
 828 /**
 829  * gtk_print_run_page_setup_dialog_async:
 830  * @parent: transient parent, or %NULL
 831  * @page_setup: an existing #GtkPageSetup, or %NULL
 832  * @settings: a #GtkPrintSettings
 833  * @done_cb: a function to call when the user saves the modified page setup
 834  * @data: user data to pass to @done_cb
 835  *
 836  * Runs a page setup dialog, letting the user modify the values from @page_setup.
 837  *
 838  * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after
 839  * showing the page setup dialog on platforms that support this, and calls @done_cb
 840  * from a signal handler for the ::response signal of the dialog.
 841  *
 842  * Since: 2.10
 843  */
 844 void
 845 gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
 846                                        GtkPageSetup         *page_setup,
 847                                        GtkPrintSettings     *settings,
 848                                        GtkPageSetupDoneFunc  done_cb,
 849                                        gpointer              data)
 850 {
 851   GtkWidget *dialog;
 852   PageSetupResponseData *rdata;
 853
 854   dialog = get_page_setup_dialog (parent, page_setup, settings);
 855   gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
 856
 857   rdata = g_new (PageSetupResponseData, 1);
 858   rdata->page_setup = NULL;
 859   rdata->done_cb = done_cb;
 860   rdata->data = data;
 861   rdata->destroy = page_setup_data_free;
 862
 863   g_signal_connect (dialog, "response",
 864                     G_CALLBACK (handle_page_setup_response), rdata);
 865
 866   gtk_window_present (GTK_WINDOW (dialog));
 867  }
 868
 869 struct _PrinterFinder
 870 {
 871   gboolean found_printer;
 872   GFunc func;
 873   gpointer data;
 874   gchar *printer_name;
 875   GList *backends;
 876   guint timeout_tag;
 877   GtkPrinter *printer;
 878   GtkPrinter *default_printer;
 879   GtkPrinter *first_printer;
 880 };
 881
 882 static gboolean
 883 find_printer_idle (gpointer data)
 884 {
 885   PrinterFinder *finder = data;
 886   GtkPrinter *printer;
 887
 888   if (finder->printer != NULL)
 889     printer = finder->printer;
 890   else if (finder->default_printer != NULL)
 891     printer = finder->default_printer;
 892   else if (finder->first_printer != NULL)
 893     printer = finder->first_printer;
 894   else
 895     printer = NULL;
 896
 897   finder->func (printer, finder->data);
 898
 899   printer_finder_free (finder);
 900
 901   return FALSE;
 902 }
 903
 904 static void
 905 printer_added_cb (GtkPrintBackend *backend,
 906                   GtkPrinter      *printer,
 907                   PrinterFinder   *finder)
 908 {
 909   if (finder->found_printer)
 910     return;
 911
 912   /* FIXME this skips "Print to PDF" - is this intentional ? */
 913   if (gtk_printer_is_virtual (printer))
 914     return;
 915
 916   if (finder->printer_name != NULL &&
 917       strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
 918     {
 919       finder->printer = g_object_ref (printer);
 920       finder->found_printer = TRUE;
 921     }
 922   else if (finder->default_printer == NULL &&
 923            gtk_printer_is_default (printer))
 924     {
 925       finder->default_printer = g_object_ref (printer);
 926       if (finder->printer_name == NULL)
 927         finder->found_printer = TRUE;
 928     }
 929   else
 930     if (finder->first_printer == NULL)
 931       finder->first_printer = g_object_ref (printer);
 932
 933   if (finder->found_printer)
 934     g_idle_add (find_printer_idle, finder);
 935 }
 936
 937 static void
 938 printer_list_done_cb (GtkPrintBackend *backend,
 939                       PrinterFinder   *finder)
 940 {
 941   finder->backends = g_list_remove (finder->backends, backend);
 942
 943   g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 944   g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 945
 946   gtk_print_backend_destroy (backend);
 947   g_object_unref (backend);
 948
 949   if (finder->backends == NULL && !finder->found_printer)
 950     g_idle_add (find_printer_idle, finder);
 951 }
 952
 953 static void
 954 find_printer_init (PrinterFinder   *finder,
 955                    GtkPrintBackend *backend)
 956 {
 957   GList *list;
 958   GList *node;
 959
 960   list = gtk_print_backend_get_printer_list (backend);
 961
 962   node = list;
 963   while (node != NULL)
 964     {
 965       printer_added_cb (backend, node->data, finder);
 966       node = node->next;
 967
 968       if (finder->found_printer)
 969         break;
 970     }
 971
 972   g_list_free (list);
 973
 974   if (gtk_print_backend_printer_list_is_done (backend))
 975     {
 976       finder->backends = g_list_remove (finder->backends, backend);
 977       gtk_print_backend_destroy (backend);
 978       g_object_unref (backend);
 979     }
 980   else
 981     {
 982       g_signal_connect (backend, "printer-added",
 983                         (GCallback) printer_added_cb,
 984                         finder);
 985       g_signal_connect (backend, "printer-list-done",
 986                         (GCallback) printer_list_done_cb,
 987                         finder);
 988     }
 989
 990 }
 991
 992 static void
 993 printer_finder_free (PrinterFinder *finder)
 994 {
 995   GList *l;
 996
 997   g_free (finder->printer_name);
 998
 999   if (finder->printer)
1000     g_object_unref (finder->printer);
1001
1002   if (finder->default_printer)
1003     g_object_unref (finder->default_printer);
1004
1005   if (finder->first_printer)
1006     g_object_unref (finder->first_printer);
1007
1008   for (l = finder->backends; l != NULL; l = l->next)
1009     {
1010       GtkPrintBackend *backend = l->data;
1011       g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
1012       g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
1013       gtk_print_backend_destroy (backend);
1014       g_object_unref (backend);
1015     }
1016
1017   g_list_free (finder->backends);
1018
1019   g_free (finder);
1020 }
1021
1022 static void
1023 find_printer (const gchar *printer,
1024               GFunc        func,
1025               gpointer     data)
1026 {
1027   GList *node, *next;
1028   PrinterFinder *finder;
1029
1030   finder = g_new0 (PrinterFinder, 1);
1031
1032   finder->printer_name = g_strdup (printer);
1033   finder->func = func;
1034   finder->data = data;
1035
1036   finder->backends = NULL;
1037   if (g_module_supported ())
1038     finder->backends = gtk_print_backend_load_modules ();
1039
1040   for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
1041     {
1042       next = node->next;
1043       find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
1044     }
1045
1046   if (finder->backends == NULL && !finder->found_printer)
1047     g_idle_add (find_printer_idle, finder);
1048 }
1049
1050 #define __GTK_PRINT_OPERATION_UNIX_C__
1051 #include "gtkaliasdef.c"