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

   1 /* GTK - The GIMP Toolkit
   2  * gtkprintoperation-unix.c: Print Operation Details for Unix and Unix like platforms
   3  * Copyright (C) 2006, Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22 #ifdef HAVE_UNISTD_H
  23 #include <unistd.h>
  24 #endif
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <string.h>
  28
  29 #include "gtkprintoperation-private.h"
  30 #include "gtkmarshal.h"
  31 #include "gtkmessagedialog.h"
  32
  33 #include <cairo-pdf.h>
  34 #include <cairo-ps.h>
  35 #include "gtkprintunixdialog.h"
  36 #include "gtkpagesetupunixdialog.h"
  37 #include "gtkprintbackend.h"
  38 #include "gtkprinter.h"
  39 #include "gtkprintjob.h"
  40 #include "gtklabel.h"
  41 #include "gtkalias.h"
  42 #include "gtkintl.h"
  43
  44
  45 typedef struct {
  46   GtkPrintJob *job;         /* the job we are sending to the printer */
  47   gulong job_status_changed_tag;
  48   GtkWindow *parent;        /* just in case we need to throw error dialogs */
  49   GMainLoop *loop;
  50   gboolean data_sent;
  51 } GtkPrintOperationUnix;
  52
  53 typedef struct _PrinterFinder PrinterFinder;
  54
  55 static void printer_finder_free (PrinterFinder *finder);
  56 static void find_printer        (const char    *printer,
  57                                  GFunc          func,
  58                                  gpointer       data);
  59
  60 static void
  61 unix_start_page (GtkPrintOperation *op,
  62                  GtkPrintContext   *print_context,
  63                  GtkPageSetup      *page_setup)
  64 {
  65   GtkPaperSize *paper_size;
  66   cairo_surface_type_t type;
  67   double w, h;
  68
  69   paper_size = gtk_page_setup_get_paper_size (page_setup);
  70
  71   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
  72   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
  73
  74   type = cairo_surface_get_type (op->priv->surface);
  75
  76   if (type == CAIRO_SURFACE_TYPE_PS)
  77     cairo_ps_surface_set_size (op->priv->surface, w, h);
  78   else if (type == CAIRO_SURFACE_TYPE_PDF)
  79     cairo_pdf_surface_set_size (op->priv->surface, w, h);
  80 }
  81
  82 static void
  83 unix_end_page (GtkPrintOperation *op,
  84                GtkPrintContext   *print_context)
  85 {
  86   cairo_t *cr;
  87
  88   cr = gtk_print_context_get_cairo (print_context);
  89   cairo_show_page (cr);
  90 }
  91
  92 static void
  93 op_unix_free (GtkPrintOperationUnix *op_unix)
  94 {
  95   if (op_unix->job)
  96     {
  97       g_signal_handler_disconnect (op_unix->job,
  98                                    op_unix->job_status_changed_tag);
  99       g_object_unref (op_unix->job);
 100     }
 101
 102   g_free (op_unix);
 103 }
 104
 105 static void
 106 unix_finish_send  (GtkPrintJob *job,
 107                    void        *user_data,
 108                    GError      *error)
 109 {
 110   GtkPrintOperationUnix *op_unix;
 111
 112   op_unix = (GtkPrintOperationUnix *) user_data;
 113
 114   if (error != NULL)
 115     {
 116       GtkWidget *edialog;
 117       edialog = gtk_message_dialog_new (op_unix->parent,
 118                                         GTK_DIALOG_DESTROY_WITH_PARENT,
 119                                         GTK_MESSAGE_ERROR,
 120                                         GTK_BUTTONS_CLOSE,
 121                                         _("Error printing") /* FIXME better text */);
 122       gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
 123                                                 "%s", error->message);
 124       gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
 125       g_signal_connect (edialog, "response",
 126                         G_CALLBACK (gtk_widget_destroy), NULL);
 127
 128       gtk_window_present (GTK_WINDOW (edialog));
 129     }
 130
 131   op_unix->data_sent = TRUE;
 132   if (op_unix->loop)
 133     g_main_loop_quit (op_unix->loop);
 134 }
 135
 136 static void
 137 unix_end_run (GtkPrintOperation *op,
 138               gboolean           wait,
 139               gboolean           cancelled)
 140 {
 141   GtkPrintOperationUnix *op_unix = op->priv->platform_data;
 142
 143   if (cancelled)
 144     return;
 145
 146   if (wait)
 147     op_unix->loop = g_main_loop_new (NULL, FALSE);
 148
 149   /* TODO: Check for error */
 150   gtk_print_job_send (op_unix->job,
 151                       unix_finish_send,
 152                       op_unix, NULL,
 153                       NULL);
 154
 155   if (wait)
 156     {
 157       if (!op_unix->data_sent)
 158         {
 159           GDK_THREADS_LEAVE ();
 160           g_main_loop_run (op_unix->loop);
 161           GDK_THREADS_ENTER ();
 162         }
 163       g_main_loop_unref (op_unix->loop);
 164     }
 165 }
 166
 167 static void
 168 job_status_changed_cb (GtkPrintJob       *job,
 169                        GtkPrintOperation *op)
 170 {
 171   _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 172 }
 173
 174
 175 static GtkWidget *
 176 get_print_dialog (GtkPrintOperation *op,
 177                   GtkWindow         *parent)
 178 {
 179   GtkPrintOperationPrivate *priv = op->priv;
 180   GtkWidget *pd, *label;
 181   GtkPageSetup *page_setup;
 182   const char *app_name;
 183
 184   pd = gtk_print_unix_dialog_new (NULL, parent);
 185
 186   gtk_print_unix_dialog_set_manual_capabilities (GTK_PRINT_UNIX_DIALOG (pd),
 187                                                  GTK_PRINT_CAPABILITY_PAGE_SET |
 188                                                  GTK_PRINT_CAPABILITY_COPIES |
 189                                                  GTK_PRINT_CAPABILITY_COLLATE |
 190                                                  GTK_PRINT_CAPABILITY_REVERSE |
 191                                                  GTK_PRINT_CAPABILITY_SCALE);
 192
 193   if (priv->print_settings)
 194     gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG (pd),
 195                                         priv->print_settings);
 196   if (priv->default_page_setup)
 197     page_setup = gtk_page_setup_copy (priv->default_page_setup);
 198   else
 199     page_setup = gtk_page_setup_new ();
 200
 201   gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
 202                                         page_setup);
 203   g_object_unref (page_setup);
 204
 205   g_signal_emit_by_name (op, "create-custom-widget",
 206                          &op->priv->custom_widget);
 207
 208   if (op->priv->custom_widget) {
 209     app_name = g_get_application_name ();
 210     if (app_name == NULL)
 211       app_name = _("Application");
 212
 213     label = gtk_label_new (app_name);
 214
 215     gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
 216                                           op->priv->custom_widget, label);
 217   }
 218
 219   return pd;
 220 }
 221
 222 typedef struct {
 223   GtkPrintOperation           *op;
 224   gboolean                     do_print;
 225   GError                     **error;
 226   GtkPrintOperationResult      result;
 227   GtkPrintOperationPrintFunc   print_cb;
 228   GDestroyNotify               destroy;
 229   GtkWindow                   *parent;
 230   GMainLoop                   *loop;
 231 } PrintResponseData;
 232
 233 static void
 234 print_response_data_free (gpointer data)
 235 {
 236   PrintResponseData *rdata = data;
 237
 238   g_object_unref (rdata->op);
 239   g_free (rdata);
 240 }
 241
 242 static void
 243 finish_print (PrintResponseData *rdata,
 244               GtkPrinter *printer,
 245               GtkPageSetup *page_setup,
 246               GtkPrintSettings *settings)
 247 {
 248   GtkPrintOperation *op = rdata->op;
 249   GtkPrintOperationPrivate *priv = op->priv;
 250
 251   priv->start_page = unix_start_page;
 252   priv->end_page = unix_end_page;
 253   priv->end_run = unix_end_run;
 254
 255   if (rdata->do_print)
 256     {
 257       GtkPrintOperationUnix *op_unix;
 258
 259       gtk_print_operation_set_print_settings (op, settings);
 260
 261       op_unix = g_new0 (GtkPrintOperationUnix, 1);
 262       op_unix->job = gtk_print_job_new (priv->job_name,
 263                                         printer,
 264                                         settings,
 265                                         page_setup);
 266
 267       gtk_print_job_set_track_print_status (op_unix->job, priv->track_print_status);
 268
 269       rdata->op->priv->surface = gtk_print_job_get_surface (op_unix->job, rdata->error);
 270       if (op->priv->surface == NULL)
 271         {
 272           rdata->do_print = FALSE;
 273           op_unix_free (op_unix);
 274           rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
 275           goto out;
 276         }
 277
 278       _gtk_print_operation_set_status (op, gtk_print_job_get_status (op_unix->job), NULL);
 279       op_unix->job_status_changed_tag =
 280         g_signal_connect (op_unix->job, "status_changed",
 281                           G_CALLBACK (job_status_changed_cb), op);
 282
 283       op_unix->parent = rdata->parent;
 284
 285       priv->dpi_x = 72;
 286       priv->dpi_y = 72;
 287
 288       priv->platform_data = op_unix;
 289       priv->free_platform_data = (GDestroyNotify) op_unix_free;
 290
 291       priv->print_pages = op_unix->job->print_pages;
 292       priv->page_ranges = op_unix->job->page_ranges;
 293       priv->num_page_ranges = op_unix->job->num_page_ranges;
 294
 295       priv->manual_num_copies = op_unix->job->num_copies;
 296       priv->manual_collation = op_unix->job->collate;
 297       priv->manual_reverse = op_unix->job->reverse;
 298       priv->manual_page_set = op_unix->job->page_set;
 299       priv->manual_scale = op_unix->job->scale;
 300       priv->manual_orientation = op_unix->job->rotate_to_orientation;
 301     }
 302
 303  out:
 304   if (rdata->print_cb)
 305     {
 306       if (rdata->do_print)
 307         rdata->print_cb (op, rdata->parent, FALSE);
 308       else
 309        _gtk_print_operation_set_status (op, GTK_PRINT_STATUS_FINISHED_ABORTED, NULL);
 310     }
 311
 312   if (rdata->destroy)
 313     rdata->destroy (rdata);
 314 }
 315
 316 static void
 317 handle_print_response (GtkWidget *dialog,
 318                        gint       response,
 319                        gpointer   data)
 320 {
 321   GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
 322   PrintResponseData *rdata = data;
 323   GtkPrintSettings *settings = NULL;
 324   GtkPageSetup *page_setup = NULL;
 325   GtkPrinter *printer = NULL;
 326
 327   if (response == GTK_RESPONSE_OK)
 328     {
 329       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 330
 331       printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
 332       if (printer == NULL)
 333         goto out;
 334
 335       rdata->do_print = TRUE;
 336
 337       settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
 338       page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
 339
 340       g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
 341     }
 342
 343  out:
 344   finish_print (rdata, printer, page_setup, settings);
 345
 346   if (settings)
 347     g_object_unref (settings);
 348
 349   gtk_widget_destroy (GTK_WIDGET (pd));
 350 }
 351
 352
 353 static void
 354 found_printer (GtkPrinter *printer,
 355                PrintResponseData *rdata)
 356 {
 357   GtkPrintOperation *op = rdata->op;
 358   GtkPrintOperationPrivate *priv = op->priv;
 359   GtkPrintSettings *settings = NULL;
 360   GtkPageSetup *page_setup = NULL;
 361
 362   if (rdata->loop)
 363     g_main_loop_quit (rdata->loop);
 364
 365   if (printer != NULL) {
 366       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 367
 368       rdata->do_print = TRUE;
 369
 370       if (priv->print_settings)
 371         settings = gtk_print_settings_copy (priv->print_settings);
 372       else
 373         settings = gtk_print_settings_new ();
 374
 375       gtk_print_settings_set_printer (settings,
 376                                       gtk_printer_get_name (printer));
 377
 378       if (priv->default_page_setup)
 379         page_setup = gtk_page_setup_copy (priv->default_page_setup);
 380       else
 381         page_setup = gtk_page_setup_new ();
 382   }
 383
 384   finish_print (rdata, printer, page_setup, settings);
 385
 386   if (settings)
 387     g_object_unref (settings);
 388
 389   if (page_setup)
 390     g_object_unref (page_setup);
 391 }
 392
 393 void
 394 _gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
 395                                                         GtkWindow                  *parent,
 396                                                         GtkPrintOperationPrintFunc  print_cb)
 397 {
 398   GtkWidget *pd;
 399   PrintResponseData *rdata;
 400   const char *printer_name;
 401
 402   rdata = g_new (PrintResponseData, 1);
 403   rdata->op = g_object_ref (op);
 404   rdata->do_print = FALSE;
 405   rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 406   rdata->error = NULL;
 407   rdata->print_cb = print_cb;
 408   rdata->parent = parent;
 409   rdata->loop = NULL;
 410   rdata->destroy = print_response_data_free;
 411
 412   if (op->priv->show_dialog)
 413     {
 414       pd = get_print_dialog (op, parent);
 415       gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
 416
 417       g_signal_connect (pd, "response",
 418                         G_CALLBACK (handle_print_response), rdata);
 419
 420       gtk_window_present (GTK_WINDOW (pd));
 421     }
 422   else
 423     {
 424       printer_name = NULL;
 425       if (op->priv->print_settings)
 426         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 427
 428       find_printer (printer_name,
 429                     (GFunc) found_printer, rdata);
 430     }
 431 }
 432
 433 GtkPrintOperationResult
 434 _gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
 435                                                   GtkWindow         *parent,
 436                                                   gboolean          *do_print,
 437                                                   GError           **error)
 438  {
 439   GtkWidget *pd;
 440   PrintResponseData rdata;
 441   gint response;
 442   const char *printer_name;
 443
 444   rdata.op = op;
 445   rdata.do_print = FALSE;
 446   rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 447   rdata.error = error;
 448   rdata.print_cb = NULL;
 449   rdata.destroy = NULL;
 450   rdata.parent = parent;
 451   rdata.loop = NULL;
 452
 453   if (op->priv->show_dialog)
 454     {
 455       pd = get_print_dialog (op, parent);
 456       response = gtk_dialog_run (GTK_DIALOG (pd));
 457       handle_print_response (pd, response, &rdata);
 458     }
 459   else
 460     {
 461       printer_name = NULL;
 462       if (op->priv->print_settings)
 463         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 464
 465       rdata.loop = g_main_loop_new (NULL, FALSE);
 466       find_printer (printer_name,
 467                     (GFunc) found_printer, &rdata);
 468
 469       GDK_THREADS_LEAVE ();
 470       g_main_loop_run (rdata.loop);
 471       GDK_THREADS_ENTER ();
 472
 473       g_main_loop_unref (rdata.loop);
 474     }
 475
 476   *do_print = rdata.do_print;
 477
 478   return rdata.result;
 479 }
 480
 481
 482 typedef struct {
 483   GtkPageSetup         *page_setup;
 484   GtkPageSetupDoneFunc  done_cb;
 485   gpointer              data;
 486   GDestroyNotify        destroy;
 487 } PageSetupResponseData;
 488
 489 static void
 490 page_setup_data_free (gpointer data)
 491 {
 492   PageSetupResponseData *rdata = data;
 493
 494   g_object_unref (rdata->page_setup);
 495   g_free (rdata);
 496 }
 497
 498 static void
 499 handle_page_setup_response (GtkWidget *dialog,
 500                             gint       response,
 501                             gpointer   data)
 502 {
 503   GtkPageSetupUnixDialog *psd;
 504   PageSetupResponseData *rdata = data;
 505
 506   psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
 507   if (response == GTK_RESPONSE_OK)
 508     rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
 509
 510   gtk_widget_destroy (dialog);
 511
 512   if (rdata->done_cb)
 513     rdata->done_cb (rdata->page_setup, rdata->data);
 514
 515   if (rdata->destroy)
 516     rdata->destroy (rdata);
 517 }
 518
 519 static GtkWidget *
 520 get_page_setup_dialog (GtkWindow        *parent,
 521                        GtkPageSetup     *page_setup,
 522                        GtkPrintSettings *settings)
 523 {
 524   GtkWidget *dialog;
 525
 526   dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
 527   if (page_setup)
 528     gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 529                                                page_setup);
 530   gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 531                                                  settings);
 532
 533   return dialog;
 534 }
 535
 536 /**
 537  * gtk_print_run_page_setup_dialog:
 538  * @parent: transient parent, or %NULL
 539  * @page_setup: an existing #GtkPageSetup, or %NULL
 540  * @settings: a #GtkPrintSettings
 541  *
 542  * Runs a page setup dialog, letting the user modify the values from
 543  * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
 544  * is identical to the passed in @page_setup, otherwise it contains the
 545  * modifications done in the dialog.
 546  *
 547  * Note that this function may use a recursive mainloop to show the page
 548  * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
 549  * a problem.
 550  *
 551  * Return value: a new #GtkPageSetup
 552  *
 553  * Since: 2.10
 554  */
 555 GtkPageSetup *
 556 gtk_print_run_page_setup_dialog (GtkWindow        *parent,
 557                                  GtkPageSetup     *page_setup,
 558                                  GtkPrintSettings *settings)
 559 {
 560   GtkWidget *dialog;
 561   gint response;
 562   PageSetupResponseData rdata;
 563
 564   rdata.page_setup = NULL;
 565   rdata.done_cb = NULL;
 566   rdata.data = NULL;
 567   rdata.destroy = NULL;
 568
 569   dialog = get_page_setup_dialog (parent, page_setup, settings);
 570   response = gtk_dialog_run (GTK_DIALOG (dialog));
 571   handle_page_setup_response (dialog, response, &rdata);
 572
 573   if (rdata.page_setup)
 574     return rdata.page_setup;
 575   else if (page_setup)
 576     return gtk_page_setup_copy (page_setup);
 577   else
 578     return gtk_page_setup_new ();
 579 }
 580
 581 /**
 582  * gtk_print_run_page_setup_dialog_async:
 583  * @parent: transient parent, or %NULL
 584  * @page_setup: an existing #GtkPageSetup, or %NULL
 585  * @settings: a #GtkPrintSettings
 586  * @done_cb: a function to call when the user saves the modified page setup
 587  * @data: user data to pass to @done_cb
 588  *
 589  * Runs a page setup dialog, letting the user modify the values from @page_setup.
 590  *
 591  * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after
 592  * showing the page setup dialog on platforms that support this, and calls @done_cb
 593  * from a signal handler for the ::response signal of the dialog.
 594  *
 595  * Since: 2.10
 596  */
 597 void
 598 gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
 599                                        GtkPageSetup         *page_setup,
 600                                        GtkPrintSettings     *settings,
 601                                        GtkPageSetupDoneFunc  done_cb,
 602                                        gpointer              data)
 603 {
 604   GtkWidget *dialog;
 605   PageSetupResponseData *rdata;
 606
 607   dialog = get_page_setup_dialog (parent, page_setup, settings);
 608   gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
 609
 610   rdata = g_new (PageSetupResponseData, 1);
 611   rdata->page_setup = NULL;
 612   rdata->done_cb = done_cb;
 613   rdata->data = data;
 614   rdata->destroy = page_setup_data_free;
 615
 616   g_signal_connect (dialog, "response",
 617                     G_CALLBACK (handle_page_setup_response), rdata);
 618
 619   gtk_window_present (GTK_WINDOW (dialog));
 620  }
 621
 622 struct _PrinterFinder {
 623   gboolean found_printer;
 624   GFunc func;
 625   gpointer data;
 626   char *printer_name;
 627   GList *backends;
 628   guint timeout_tag;
 629   GtkPrinter *printer;
 630   GtkPrinter *default_printer;
 631   GtkPrinter *first_printer;
 632 };
 633
 634 static gboolean
 635 find_printer_idle (gpointer data)
 636 {
 637   PrinterFinder *finder = data;
 638   GtkPrinter *printer;
 639
 640   if (finder->printer != NULL)
 641     printer = finder->printer;
 642   else if (finder->default_printer != NULL)
 643     printer = finder->default_printer;
 644   else if (finder->first_printer != NULL)
 645     printer = finder->first_printer;
 646   else
 647     printer = NULL;
 648
 649   finder->func (printer, finder->data);
 650
 651   printer_finder_free (finder);
 652
 653   return FALSE;
 654 }
 655
 656 static void
 657 printer_added_cb (GtkPrintBackend *backend,
 658                   GtkPrinter      *printer,
 659                   PrinterFinder   *finder)
 660 {
 661   if (gtk_printer_is_virtual (printer) ||
 662       finder->found_printer)
 663     return;
 664
 665   if (finder->printer_name != NULL &&
 666       strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
 667     {
 668       finder->printer = g_object_ref (printer);
 669       finder->found_printer = TRUE;
 670     }
 671   else if (finder->default_printer == NULL &&
 672            gtk_printer_is_default (printer))
 673     {
 674       finder->default_printer = g_object_ref (printer);
 675       if (finder->printer_name == NULL)
 676         finder->found_printer = TRUE;
 677     }
 678   else
 679     if (finder->first_printer == NULL)
 680       finder->first_printer = g_object_ref (printer);
 681
 682   if (finder->found_printer)
 683     g_idle_add (find_printer_idle, finder);
 684 }
 685
 686 static void
 687 printer_list_done_cb (GtkPrintBackend *backend,
 688                       PrinterFinder   *finder)
 689 {
 690   finder->backends = g_list_remove (finder->backends, backend);
 691
 692   g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 693   g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 694
 695   gtk_print_backend_destroy (backend);
 696   g_object_unref (backend);
 697
 698   if (finder->backends == NULL && !finder->found_printer)
 699     g_idle_add (find_printer_idle, finder);
 700 }
 701
 702 static void
 703 find_printer_init (PrinterFinder *finder,
 704                    GtkPrintBackend *backend)
 705 {
 706   GList *list;
 707   GList *node;
 708
 709   list = gtk_print_backend_get_printer_list (backend);
 710
 711   node = list;
 712   while (node != NULL)
 713     {
 714       printer_added_cb (backend, node->data, finder);
 715       node = node->next;
 716
 717       if (finder->found_printer)
 718         break;
 719     }
 720
 721   g_list_free (list);
 722
 723   if (gtk_print_backend_printer_list_is_done (backend))
 724     {
 725       finder->backends = g_list_remove (finder->backends, backend);
 726       gtk_print_backend_destroy (backend);
 727       g_object_unref (backend);
 728     }
 729   else
 730     {
 731       g_signal_connect (backend,
 732                         "printer-added",
 733                         (GCallback) printer_added_cb,
 734                         finder);
 735       g_signal_connect (backend,
 736                         "printer-list-done",
 737                         (GCallback) printer_list_done_cb,
 738                         finder);
 739     }
 740
 741 }
 742
 743 static void
 744 printer_finder_free (PrinterFinder *finder)
 745 {
 746   GList *l;
 747
 748   g_free (finder->printer_name);
 749
 750   if (finder->printer)
 751     g_object_unref (finder->printer);
 752
 753   if (finder->default_printer)
 754     g_object_unref (finder->default_printer);
 755
 756   if (finder->first_printer)
 757     g_object_unref (finder->first_printer);
 758
 759   for (l = finder->backends; l != NULL; l = l->next)
 760     {
 761       GtkPrintBackend *backend = l->data;
 762       g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 763       g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 764       gtk_print_backend_destroy (backend);
 765       g_object_unref (backend);
 766     }
 767
 768   g_list_free (finder->backends);
 769
 770   g_free (finder);
 771 }
 772
 773 static void
 774 find_printer (const char *printer,
 775               GFunc func,
 776               gpointer data)
 777 {
 778   GList *node, *next;
 779   PrinterFinder *finder;
 780
 781   finder = g_new0 (PrinterFinder, 1);
 782
 783   finder->printer_name = g_strdup (printer);
 784   finder->func = func;
 785   finder->data = data;
 786
 787   finder->backends = NULL;
 788   if (g_module_supported ())
 789     finder->backends = gtk_print_backend_load_modules ();
 790
 791   for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
 792     {
 793       next = node->next;
 794       find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
 795     }
 796
 797   if (finder->backends == NULL && !finder->found_printer)
 798     g_idle_add (find_printer_idle, finder);
 799 }
 800
 801 #define __GTK_PRINT_OPERATION_UNIX_C__
 802 #include "gtkaliasdef.c"