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 {
 140   GtkPrintOperationUnix *op_unix = op->priv->platform_data;
 141
 142   if (wait)
 143     op_unix->loop = g_main_loop_new (NULL, FALSE);
 144
 145   /* TODO: Check for error */
 146   gtk_print_job_send (op_unix->job,
 147                       unix_finish_send,
 148                       op_unix, NULL,
 149                       NULL);
 150
 151   if (wait)
 152     {
 153       if (!op_unix->data_sent)
 154         {
 155           GDK_THREADS_LEAVE ();
 156           g_main_loop_run (op_unix->loop);
 157           GDK_THREADS_ENTER ();
 158         }
 159       g_main_loop_unref (op_unix->loop);
 160     }
 161 }
 162
 163 static void
 164 job_status_changed_cb (GtkPrintJob       *job,
 165                        GtkPrintOperation *op)
 166 {
 167   _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 168 }
 169
 170
 171 static GtkWidget *
 172 get_print_dialog (GtkPrintOperation *op,
 173                   GtkWindow         *parent)
 174 {
 175   GtkPrintOperationPrivate *priv = op->priv;
 176   GtkWidget *pd, *label;
 177   GtkPageSetup *page_setup;
 178   const char *app_name;
 179
 180   pd = gtk_print_unix_dialog_new (NULL, parent);
 181
 182   if (priv->print_settings)
 183     gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG (pd),
 184                                         priv->print_settings);
 185   if (priv->default_page_setup)
 186     page_setup = gtk_page_setup_copy (priv->default_page_setup);
 187   else
 188     page_setup = gtk_page_setup_new ();
 189
 190   gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
 191                                         page_setup);
 192   g_object_unref (page_setup);
 193
 194   g_signal_emit_by_name (op, "create-custom-widget",
 195                          &op->priv->custom_widget);
 196
 197   if (op->priv->custom_widget) {
 198     app_name = g_get_application_name ();
 199     if (app_name == NULL)
 200       app_name = _("Application");
 201
 202     label = gtk_label_new (app_name);
 203
 204     gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
 205                                           op->priv->custom_widget, label);
 206   }
 207
 208   return pd;
 209 }
 210
 211 typedef struct {
 212   GtkPrintOperation           *op;
 213   gboolean                     do_print;
 214   GError                     **error;
 215   GtkPrintOperationResult      result;
 216   GtkPrintOperationPrintFunc   print_cb;
 217   GDestroyNotify               destroy;
 218   GtkWindow                   *parent;
 219   GMainLoop                   *loop;
 220 } PrintResponseData;
 221
 222 static void
 223 print_response_data_free (gpointer data)
 224 {
 225   PrintResponseData *rdata = data;
 226
 227   g_object_unref (rdata->op);
 228   g_free (rdata);
 229 }
 230
 231 static void
 232 finish_print (PrintResponseData *rdata,
 233               GtkPrinter *printer,
 234               GtkPageSetup *page_setup,
 235               GtkPrintSettings *settings)
 236 {
 237   GtkPrintOperation *op = rdata->op;
 238   GtkPrintOperationPrivate *priv = op->priv;
 239
 240   priv->start_page = unix_start_page;
 241   priv->end_page = unix_end_page;
 242   priv->end_run = unix_end_run;
 243
 244   if (rdata->do_print)
 245     {
 246       GtkPrintOperationUnix *op_unix;
 247
 248       gtk_print_operation_set_print_settings (op, settings);
 249
 250       op_unix = g_new0 (GtkPrintOperationUnix, 1);
 251       op_unix->job = gtk_print_job_new (priv->job_name,
 252                                         printer,
 253                                         settings,
 254                                         page_setup);
 255
 256       gtk_print_job_set_track_print_status (op_unix->job, priv->track_print_status);
 257
 258       rdata->op->priv->surface = gtk_print_job_get_surface (op_unix->job, rdata->error);
 259       if (op->priv->surface == NULL)
 260         {
 261           rdata->do_print = FALSE;
 262           op_unix_free (op_unix);
 263           rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
 264           goto out;
 265         }
 266
 267       _gtk_print_operation_set_status (op, gtk_print_job_get_status (op_unix->job), NULL);
 268       op_unix->job_status_changed_tag =
 269         g_signal_connect (op_unix->job, "status_changed",
 270                           G_CALLBACK (job_status_changed_cb), op);
 271
 272       op_unix->parent = rdata->parent;
 273
 274       priv->dpi_x = 72;
 275       priv->dpi_y = 72;
 276
 277       priv->platform_data = op_unix;
 278       priv->free_platform_data = (GDestroyNotify) op_unix_free;
 279
 280       priv->print_pages = op_unix->job->print_pages;
 281       priv->page_ranges = op_unix->job->page_ranges;
 282       priv->num_page_ranges = op_unix->job->num_page_ranges;
 283
 284       priv->manual_num_copies = op_unix->job->num_copies;
 285       priv->manual_collation = op_unix->job->collate;
 286       priv->manual_reverse = op_unix->job->reverse;
 287       priv->manual_page_set = op_unix->job->page_set;
 288       priv->manual_scale = op_unix->job->scale;
 289       priv->manual_orientation = op_unix->job->rotate_to_orientation;
 290     }
 291
 292  out:
 293   if (rdata->print_cb)
 294     {
 295       if (rdata->do_print)
 296         rdata->print_cb (op, FALSE);
 297       else
 298        _gtk_print_operation_set_status (op, GTK_PRINT_STATUS_FINISHED_ABORTED, NULL);
 299     }
 300
 301   if (rdata->destroy)
 302     rdata->destroy (rdata);
 303 }
 304
 305 static void
 306 handle_print_response (GtkWidget *dialog,
 307                        gint       response,
 308                        gpointer   data)
 309 {
 310   GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
 311   PrintResponseData *rdata = data;
 312   GtkPrintSettings *settings = NULL;
 313   GtkPageSetup *page_setup = NULL;
 314   GtkPrinter *printer = NULL;
 315
 316   if (response == GTK_RESPONSE_OK)
 317     {
 318       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 319
 320       printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
 321       if (printer == NULL)
 322         goto out;
 323
 324       rdata->do_print = TRUE;
 325
 326       settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
 327       page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
 328
 329       g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
 330     }
 331
 332  out:
 333   finish_print (rdata, printer, page_setup, settings);
 334
 335   if (settings)
 336     g_object_unref (settings);
 337
 338   gtk_widget_destroy (GTK_WIDGET (pd));
 339 }
 340
 341
 342 static void
 343 found_printer (GtkPrinter *printer,
 344                PrintResponseData *rdata)
 345 {
 346   GtkPrintOperation *op = rdata->op;
 347   GtkPrintOperationPrivate *priv = op->priv;
 348   GtkPrintSettings *settings = NULL;
 349   GtkPageSetup *page_setup = NULL;
 350
 351   if (rdata->loop)
 352     g_main_loop_quit (rdata->loop);
 353
 354   if (printer != NULL) {
 355       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 356
 357       rdata->do_print = TRUE;
 358
 359       if (priv->print_settings)
 360         settings = gtk_print_settings_copy (priv->print_settings);
 361       else
 362         settings = gtk_print_settings_new ();
 363
 364       gtk_print_settings_set_printer (settings,
 365                                       gtk_printer_get_name (printer));
 366
 367       if (priv->default_page_setup)
 368         page_setup = gtk_page_setup_copy (priv->default_page_setup);
 369       else
 370         page_setup = gtk_page_setup_new ();
 371   }
 372
 373   finish_print (rdata, printer, page_setup, settings);
 374
 375   if (settings)
 376     g_object_unref (settings);
 377
 378   if (page_setup)
 379     g_object_unref (page_setup);
 380 }
 381
 382 void
 383 _gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
 384                                                         GtkWindow                  *parent,
 385                                                         GtkPrintOperationPrintFunc  print_cb)
 386 {
 387   GtkWidget *pd;
 388   PrintResponseData *rdata;
 389   const char *printer_name;
 390
 391   rdata = g_new (PrintResponseData, 1);
 392   rdata->op = g_object_ref (op);
 393   rdata->do_print = FALSE;
 394   rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 395   rdata->error = NULL;
 396   rdata->print_cb = print_cb;
 397   rdata->parent = parent;
 398   rdata->loop = NULL;
 399   rdata->destroy = print_response_data_free;
 400
 401   if (op->priv->show_dialog)
 402     {
 403       pd = get_print_dialog (op, parent);
 404       gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
 405
 406       g_signal_connect (pd, "response",
 407                         G_CALLBACK (handle_print_response), rdata);
 408
 409       gtk_window_present (GTK_WINDOW (pd));
 410     }
 411   else
 412     {
 413       printer_name = NULL;
 414       if (op->priv->print_settings)
 415         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 416
 417       find_printer (printer_name,
 418                     (GFunc) found_printer, rdata);
 419     }
 420 }
 421
 422 GtkPrintOperationResult
 423 _gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
 424                                                   GtkWindow         *parent,
 425                                                   gboolean          *do_print,
 426                                                   GError           **error)
 427  {
 428   GtkWidget *pd;
 429   PrintResponseData rdata;
 430   gint response;
 431   const char *printer_name;
 432
 433   rdata.op = op;
 434   rdata.do_print = FALSE;
 435   rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 436   rdata.error = error;
 437   rdata.print_cb = NULL;
 438   rdata.destroy = NULL;
 439   rdata.parent = parent;
 440   rdata.loop = NULL;
 441
 442   if (op->priv->show_dialog)
 443     {
 444       pd = get_print_dialog (op, parent);
 445       response = gtk_dialog_run (GTK_DIALOG (pd));
 446       handle_print_response (pd, response, &rdata);
 447     }
 448   else
 449     {
 450       printer_name = NULL;
 451       if (op->priv->print_settings)
 452         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 453
 454       rdata.loop = g_main_loop_new (NULL, FALSE);
 455       find_printer (printer_name,
 456                     (GFunc) found_printer, &rdata);
 457
 458       GDK_THREADS_LEAVE ();
 459       g_main_loop_run (rdata.loop);
 460       GDK_THREADS_ENTER ();
 461
 462       g_main_loop_unref (rdata.loop);
 463     }
 464
 465   *do_print = rdata.do_print;
 466
 467   return rdata.result;
 468 }
 469
 470
 471 typedef struct {
 472   GtkPageSetup         *page_setup;
 473   GtkPageSetupDoneFunc  done_cb;
 474   gpointer              data;
 475   GDestroyNotify        destroy;
 476 } PageSetupResponseData;
 477
 478 static void
 479 page_setup_data_free (gpointer data)
 480 {
 481   PageSetupResponseData *rdata = data;
 482
 483   g_object_unref (rdata->page_setup);
 484   g_free (rdata);
 485 }
 486
 487 static void
 488 handle_page_setup_response (GtkWidget *dialog,
 489                             gint       response,
 490                             gpointer   data)
 491 {
 492   GtkPageSetupUnixDialog *psd;
 493   PageSetupResponseData *rdata = data;
 494
 495   psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
 496   if (response == GTK_RESPONSE_OK)
 497     rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
 498
 499   gtk_widget_destroy (dialog);
 500
 501   if (rdata->done_cb)
 502     rdata->done_cb (rdata->page_setup, rdata->data);
 503
 504   if (rdata->destroy)
 505     rdata->destroy (rdata);
 506 }
 507
 508 static GtkWidget *
 509 get_page_setup_dialog (GtkWindow        *parent,
 510                        GtkPageSetup     *page_setup,
 511                        GtkPrintSettings *settings)
 512 {
 513   GtkWidget *dialog;
 514
 515   dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
 516   if (page_setup)
 517     gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 518                                                page_setup);
 519   gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 520                                                  settings);
 521
 522   return dialog;
 523 }
 524
 525 /**
 526  * gtk_print_run_page_setup_dialog:
 527  * @parent: transient parent, or %NULL
 528  * @page_setup: an existing #GtkPageSetup, or %NULL
 529  * @settings: a #GtkPrintSettings
 530  *
 531  * Runs a page setup dialog, letting the user modify the values from
 532  * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
 533  * is identical to the passed in @page_setup, otherwise it contains the
 534  * modifications done in the dialog.
 535  *
 536  * Note that this function may use a recursive mainloop to show the page
 537  * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
 538  * a problem.
 539  *
 540  * Return value: a new #GtkPageSetup
 541  *
 542  * Since: 2.10
 543  */
 544 GtkPageSetup *
 545 gtk_print_run_page_setup_dialog (GtkWindow        *parent,
 546                                  GtkPageSetup     *page_setup,
 547                                  GtkPrintSettings *settings)
 548 {
 549   GtkWidget *dialog;
 550   gint response;
 551   PageSetupResponseData rdata;
 552
 553   rdata.page_setup = NULL;
 554   rdata.done_cb = NULL;
 555   rdata.data = NULL;
 556   rdata.destroy = NULL;
 557
 558   dialog = get_page_setup_dialog (parent, page_setup, settings);
 559   response = gtk_dialog_run (GTK_DIALOG (dialog));
 560   handle_page_setup_response (dialog, response, &rdata);
 561
 562   if (rdata.page_setup)
 563     return rdata.page_setup;
 564   else if (page_setup)
 565     return gtk_page_setup_copy (page_setup);
 566   else
 567     return gtk_page_setup_new ();
 568 }
 569
 570 /**
 571  * gtk_print_run_page_setup_dialog_async:
 572  * @parent: transient parent, or %NULL
 573  * @page_setup: an existing #GtkPageSetup, or %NULL
 574  * @settings: a #GtkPrintSettings
 575  * @done_cb: a function to call when the user saves the modified page setup
 576  * @data: user data to pass to @done_cb
 577  *
 578  * Runs a page setup dialog, letting the user modify the values from @page_setup.
 579  *
 580  * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after
 581  * showing the page setup dialog on platforms that support this, and calls @done_cb
 582  * from a signal handler for the ::response signal of the dialog.
 583  *
 584  * Since: 2.10
 585  */
 586 void
 587 gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
 588                                        GtkPageSetup         *page_setup,
 589                                        GtkPrintSettings     *settings,
 590                                        GtkPageSetupDoneFunc  done_cb,
 591                                        gpointer              data)
 592 {
 593   GtkWidget *dialog;
 594   PageSetupResponseData *rdata;
 595
 596   dialog = get_page_setup_dialog (parent, page_setup, settings);
 597   gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
 598
 599   rdata = g_new (PageSetupResponseData, 1);
 600   rdata->page_setup = NULL;
 601   rdata->done_cb = done_cb;
 602   rdata->data = data;
 603   rdata->destroy = page_setup_data_free;
 604
 605   g_signal_connect (dialog, "response",
 606                     G_CALLBACK (handle_page_setup_response), rdata);
 607
 608   gtk_window_present (GTK_WINDOW (dialog));
 609  }
 610
 611 struct _PrinterFinder {
 612   gboolean found_printer;
 613   GFunc func;
 614   gpointer data;
 615   char *printer_name;
 616   GList *backends;
 617   guint timeout_tag;
 618   GtkPrinter *printer;
 619   GtkPrinter *default_printer;
 620   GtkPrinter *first_printer;
 621 };
 622
 623 static gboolean
 624 find_printer_idle (gpointer data)
 625 {
 626   PrinterFinder *finder = data;
 627   GtkPrinter *printer;
 628
 629   if (finder->printer != NULL)
 630     printer = finder->printer;
 631   else if (finder->default_printer != NULL)
 632     printer = finder->default_printer;
 633   else if (finder->first_printer != NULL)
 634     printer = finder->first_printer;
 635   else
 636     printer = NULL;
 637
 638   finder->func (printer, finder->data);
 639
 640   printer_finder_free (finder);
 641
 642   return FALSE;
 643 }
 644
 645 static void
 646 printer_added_cb (GtkPrintBackend *backend,
 647                   GtkPrinter      *printer,
 648                   PrinterFinder   *finder)
 649 {
 650   if (gtk_printer_is_virtual (printer) ||
 651       finder->found_printer)
 652     return;
 653
 654   if (finder->printer_name != NULL &&
 655       strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
 656     {
 657       finder->printer = g_object_ref (printer);
 658       finder->found_printer = TRUE;
 659     }
 660   else if (finder->default_printer == NULL &&
 661            gtk_printer_is_default (printer))
 662     {
 663       finder->default_printer = g_object_ref (printer);
 664       if (finder->printer_name == NULL)
 665         finder->found_printer = TRUE;
 666     }
 667   else
 668     if (finder->first_printer == NULL)
 669       finder->first_printer = g_object_ref (printer);
 670
 671   if (finder->found_printer)
 672     g_idle_add (find_printer_idle, finder);
 673 }
 674
 675 static void
 676 printer_list_done_cb (GtkPrintBackend *backend,
 677                       PrinterFinder   *finder)
 678 {
 679   finder->backends = g_list_remove (finder->backends, backend);
 680
 681   g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 682   g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 683
 684   gtk_print_backend_destroy (backend);
 685   g_object_unref (backend);
 686
 687   if (finder->backends == NULL && !finder->found_printer)
 688     g_idle_add (find_printer_idle, finder);
 689 }
 690
 691 static void
 692 find_printer_init (PrinterFinder *finder,
 693                    GtkPrintBackend *backend)
 694 {
 695   GList *list;
 696   GList *node;
 697
 698   list = gtk_print_backend_get_printer_list (backend);
 699
 700   node = list;
 701   while (node != NULL)
 702     {
 703       printer_added_cb (backend, node->data, finder);
 704       node = node->next;
 705
 706       if (finder->found_printer)
 707         break;
 708     }
 709
 710   g_list_free (list);
 711
 712   if (gtk_print_backend_printer_list_is_done (backend))
 713     {
 714       finder->backends = g_list_remove (finder->backends, backend);
 715       gtk_print_backend_destroy (backend);
 716       g_object_unref (backend);
 717     }
 718   else
 719     {
 720       g_signal_connect (backend,
 721                         "printer-added",
 722                         (GCallback) printer_added_cb,
 723                         finder);
 724       g_signal_connect (backend,
 725                         "printer-list-done",
 726                         (GCallback) printer_list_done_cb,
 727                         finder);
 728     }
 729
 730 }
 731
 732 static void
 733 printer_finder_free (PrinterFinder *finder)
 734 {
 735   GList *l;
 736
 737   g_free (finder->printer_name);
 738
 739   if (finder->printer)
 740     g_object_unref (finder->printer);
 741
 742   if (finder->default_printer)
 743     g_object_unref (finder->default_printer);
 744
 745   if (finder->first_printer)
 746     g_object_unref (finder->first_printer);
 747
 748   for (l = finder->backends; l != NULL; l = l->next)
 749     {
 750       GtkPrintBackend *backend = l->data;
 751       g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 752       g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 753       gtk_print_backend_destroy (backend);
 754       g_object_unref (backend);
 755     }
 756
 757   g_list_free (finder->backends);
 758
 759   g_free (finder);
 760 }
 761
 762 static void
 763 find_printer (const char *printer,
 764               GFunc func,
 765               gpointer data)
 766 {
 767   GList *node, *next;
 768   PrinterFinder *finder;
 769
 770   finder = g_new0 (PrinterFinder, 1);
 771
 772   finder->printer_name = g_strdup (printer);
 773   finder->func = func;
 774   finder->data = data;
 775
 776   finder->backends = NULL;
 777   if (g_module_supported ())
 778     finder->backends = gtk_print_backend_load_modules ();
 779
 780   for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
 781     {
 782       next = node->next;
 783       find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
 784     }
 785
 786   if (finder->backends == NULL && !finder->found_printer)
 787     g_idle_add (find_printer_idle, finder);
 788 }
 789
 790 #define __GTK_PRINT_OPERATION_UNIX_C__
 791 #include "gtkaliasdef.c"