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_context (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 gchar *custom_tab_label;
 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                          &priv->custom_widget);
 207
 208   if (priv->custom_widget)
 209     {
 210       custom_tab_label = priv->custom_tab_label;
 211
 212       if (custom_tab_label == NULL)
 213         {
 214           custom_tab_label = g_get_application_name ();
 215           if (custom_tab_label == NULL)
 216             custom_tab_label = _("Application");
 217         }
 218
 219       label = gtk_label_new (custom_tab_label);
 220
 221       gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
 222                                             op->priv->custom_widget, label);
 223     }
 224
 225   return pd;
 226 }
 227
 228 typedef struct {
 229   GtkPrintOperation           *op;
 230   gboolean                     do_print;
 231   GError                     **error;
 232   GtkPrintOperationResult      result;
 233   GtkPrintOperationPrintFunc   print_cb;
 234   GDestroyNotify               destroy;
 235   GtkWindow                   *parent;
 236   GMainLoop                   *loop;
 237 } PrintResponseData;
 238
 239 static void
 240 print_response_data_free (gpointer data)
 241 {
 242   PrintResponseData *rdata = data;
 243
 244   g_object_unref (rdata->op);
 245   g_free (rdata);
 246 }
 247
 248 static void
 249 finish_print (PrintResponseData *rdata,
 250               GtkPrinter *printer,
 251               GtkPageSetup *page_setup,
 252               GtkPrintSettings *settings)
 253 {
 254   GtkPrintOperation *op = rdata->op;
 255   GtkPrintOperationPrivate *priv = op->priv;
 256
 257   priv->start_page = unix_start_page;
 258   priv->end_page = unix_end_page;
 259   priv->end_run = unix_end_run;
 260
 261   if (rdata->do_print)
 262     {
 263       GtkPrintOperationUnix *op_unix;
 264
 265       gtk_print_operation_set_print_settings (op, settings);
 266
 267       op_unix = g_new0 (GtkPrintOperationUnix, 1);
 268       op_unix->job = gtk_print_job_new (priv->job_name,
 269                                         printer,
 270                                         settings,
 271                                         page_setup);
 272
 273       gtk_print_job_set_track_print_status (op_unix->job, priv->track_print_status);
 274
 275       rdata->op->priv->surface = gtk_print_job_get_surface (op_unix->job, rdata->error);
 276       if (op->priv->surface == NULL)
 277         {
 278           rdata->do_print = FALSE;
 279           op_unix_free (op_unix);
 280           rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
 281           goto out;
 282         }
 283
 284       _gtk_print_operation_set_status (op, gtk_print_job_get_status (op_unix->job), NULL);
 285       op_unix->job_status_changed_tag =
 286         g_signal_connect (op_unix->job, "status-changed",
 287                           G_CALLBACK (job_status_changed_cb), op);
 288
 289       op_unix->parent = rdata->parent;
 290
 291       priv->dpi_x = 72;
 292       priv->dpi_y = 72;
 293
 294       priv->platform_data = op_unix;
 295       priv->free_platform_data = (GDestroyNotify) op_unix_free;
 296
 297       priv->print_pages = op_unix->job->print_pages;
 298       priv->page_ranges = op_unix->job->page_ranges;
 299       priv->num_page_ranges = op_unix->job->num_page_ranges;
 300
 301       priv->manual_num_copies = op_unix->job->num_copies;
 302       priv->manual_collation = op_unix->job->collate;
 303       priv->manual_reverse = op_unix->job->reverse;
 304       priv->manual_page_set = op_unix->job->page_set;
 305       priv->manual_scale = op_unix->job->scale;
 306       priv->manual_orientation = op_unix->job->rotate_to_orientation;
 307     }
 308
 309  out:
 310   if (rdata->print_cb)
 311     {
 312       if (rdata->do_print)
 313         rdata->print_cb (op, rdata->parent, FALSE);
 314       else
 315        _gtk_print_operation_set_status (op, GTK_PRINT_STATUS_FINISHED_ABORTED, NULL);
 316     }
 317
 318   if (rdata->destroy)
 319     rdata->destroy (rdata);
 320 }
 321
 322 static void
 323 handle_print_response (GtkWidget *dialog,
 324                        gint       response,
 325                        gpointer   data)
 326 {
 327   GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
 328   PrintResponseData *rdata = data;
 329   GtkPrintSettings *settings = NULL;
 330   GtkPageSetup *page_setup = NULL;
 331   GtkPrinter *printer = NULL;
 332
 333   if (response == GTK_RESPONSE_OK)
 334     {
 335       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 336
 337       printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
 338       if (printer == NULL)
 339         goto out;
 340
 341       rdata->do_print = TRUE;
 342
 343       settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
 344       page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
 345
 346       g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
 347     }
 348
 349  out:
 350   finish_print (rdata, printer, page_setup, settings);
 351
 352   if (settings)
 353     g_object_unref (settings);
 354
 355   gtk_widget_destroy (GTK_WIDGET (pd));
 356 }
 357
 358
 359 static void
 360 found_printer (GtkPrinter *printer,
 361                PrintResponseData *rdata)
 362 {
 363   GtkPrintOperation *op = rdata->op;
 364   GtkPrintOperationPrivate *priv = op->priv;
 365   GtkPrintSettings *settings = NULL;
 366   GtkPageSetup *page_setup = NULL;
 367
 368   if (rdata->loop)
 369     g_main_loop_quit (rdata->loop);
 370
 371   if (printer != NULL) {
 372       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 373
 374       rdata->do_print = TRUE;
 375
 376       if (priv->print_settings)
 377         settings = gtk_print_settings_copy (priv->print_settings);
 378       else
 379         settings = gtk_print_settings_new ();
 380
 381       gtk_print_settings_set_printer (settings,
 382                                       gtk_printer_get_name (printer));
 383
 384       if (priv->default_page_setup)
 385         page_setup = gtk_page_setup_copy (priv->default_page_setup);
 386       else
 387         page_setup = gtk_page_setup_new ();
 388   }
 389
 390   finish_print (rdata, printer, page_setup, settings);
 391
 392   if (settings)
 393     g_object_unref (settings);
 394
 395   if (page_setup)
 396     g_object_unref (page_setup);
 397 }
 398
 399 void
 400 _gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
 401                                                         GtkWindow                  *parent,
 402                                                         GtkPrintOperationPrintFunc  print_cb)
 403 {
 404   GtkWidget *pd;
 405   PrintResponseData *rdata;
 406   const char *printer_name;
 407
 408   rdata = g_new (PrintResponseData, 1);
 409   rdata->op = g_object_ref (op);
 410   rdata->do_print = FALSE;
 411   rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 412   rdata->error = NULL;
 413   rdata->print_cb = print_cb;
 414   rdata->parent = parent;
 415   rdata->loop = NULL;
 416   rdata->destroy = print_response_data_free;
 417
 418   if (op->priv->show_dialog)
 419     {
 420       pd = get_print_dialog (op, parent);
 421       gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
 422
 423       g_signal_connect (pd, "response",
 424                         G_CALLBACK (handle_print_response), rdata);
 425
 426       gtk_window_present (GTK_WINDOW (pd));
 427     }
 428   else
 429     {
 430       printer_name = NULL;
 431       if (op->priv->print_settings)
 432         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 433
 434       find_printer (printer_name,
 435                     (GFunc) found_printer, rdata);
 436     }
 437 }
 438
 439 GtkPrintOperationResult
 440 _gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
 441                                                   GtkWindow         *parent,
 442                                                   gboolean          *do_print,
 443                                                   GError           **error)
 444  {
 445   GtkWidget *pd;
 446   PrintResponseData rdata;
 447   gint response;
 448   const char *printer_name;
 449
 450   rdata.op = op;
 451   rdata.do_print = FALSE;
 452   rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 453   rdata.error = error;
 454   rdata.print_cb = NULL;
 455   rdata.destroy = NULL;
 456   rdata.parent = parent;
 457   rdata.loop = NULL;
 458
 459   if (op->priv->show_dialog)
 460     {
 461       pd = get_print_dialog (op, parent);
 462       response = gtk_dialog_run (GTK_DIALOG (pd));
 463       handle_print_response (pd, response, &rdata);
 464     }
 465   else
 466     {
 467       printer_name = NULL;
 468       if (op->priv->print_settings)
 469         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 470
 471       rdata.loop = g_main_loop_new (NULL, FALSE);
 472       find_printer (printer_name,
 473                     (GFunc) found_printer, &rdata);
 474
 475       GDK_THREADS_LEAVE ();
 476       g_main_loop_run (rdata.loop);
 477       GDK_THREADS_ENTER ();
 478
 479       g_main_loop_unref (rdata.loop);
 480     }
 481
 482   *do_print = rdata.do_print;
 483
 484   return rdata.result;
 485 }
 486
 487
 488 typedef struct {
 489   GtkPageSetup         *page_setup;
 490   GtkPageSetupDoneFunc  done_cb;
 491   gpointer              data;
 492   GDestroyNotify        destroy;
 493 } PageSetupResponseData;
 494
 495 static void
 496 page_setup_data_free (gpointer data)
 497 {
 498   PageSetupResponseData *rdata = data;
 499
 500   g_object_unref (rdata->page_setup);
 501   g_free (rdata);
 502 }
 503
 504 static void
 505 handle_page_setup_response (GtkWidget *dialog,
 506                             gint       response,
 507                             gpointer   data)
 508 {
 509   GtkPageSetupUnixDialog *psd;
 510   PageSetupResponseData *rdata = data;
 511
 512   psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
 513   if (response == GTK_RESPONSE_OK)
 514     rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
 515
 516   gtk_widget_destroy (dialog);
 517
 518   if (rdata->done_cb)
 519     rdata->done_cb (rdata->page_setup, rdata->data);
 520
 521   if (rdata->destroy)
 522     rdata->destroy (rdata);
 523 }
 524
 525 static GtkWidget *
 526 get_page_setup_dialog (GtkWindow        *parent,
 527                        GtkPageSetup     *page_setup,
 528                        GtkPrintSettings *settings)
 529 {
 530   GtkWidget *dialog;
 531
 532   dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
 533   if (page_setup)
 534     gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 535                                                page_setup);
 536   gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 537                                                  settings);
 538
 539   return dialog;
 540 }
 541
 542 /**
 543  * gtk_print_run_page_setup_dialog:
 544  * @parent: transient parent, or %NULL
 545  * @page_setup: an existing #GtkPageSetup, or %NULL
 546  * @settings: a #GtkPrintSettings
 547  *
 548  * Runs a page setup dialog, letting the user modify the values from
 549  * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
 550  * is identical to the passed in @page_setup, otherwise it contains the
 551  * modifications done in the dialog.
 552  *
 553  * Note that this function may use a recursive mainloop to show the page
 554  * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
 555  * a problem.
 556  *
 557  * Return value: a new #GtkPageSetup
 558  *
 559  * Since: 2.10
 560  */
 561 GtkPageSetup *
 562 gtk_print_run_page_setup_dialog (GtkWindow        *parent,
 563                                  GtkPageSetup     *page_setup,
 564                                  GtkPrintSettings *settings)
 565 {
 566   GtkWidget *dialog;
 567   gint response;
 568   PageSetupResponseData rdata;
 569
 570   rdata.page_setup = NULL;
 571   rdata.done_cb = NULL;
 572   rdata.data = NULL;
 573   rdata.destroy = NULL;
 574
 575   dialog = get_page_setup_dialog (parent, page_setup, settings);
 576   response = gtk_dialog_run (GTK_DIALOG (dialog));
 577   handle_page_setup_response (dialog, response, &rdata);
 578
 579   if (rdata.page_setup)
 580     return rdata.page_setup;
 581   else if (page_setup)
 582     return gtk_page_setup_copy (page_setup);
 583   else
 584     return gtk_page_setup_new ();
 585 }
 586
 587 /**
 588  * gtk_print_run_page_setup_dialog_async:
 589  * @parent: transient parent, or %NULL
 590  * @page_setup: an existing #GtkPageSetup, or %NULL
 591  * @settings: a #GtkPrintSettings
 592  * @done_cb: a function to call when the user saves the modified page setup
 593  * @data: user data to pass to @done_cb
 594  *
 595  * Runs a page setup dialog, letting the user modify the values from @page_setup.
 596  *
 597  * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after
 598  * showing the page setup dialog on platforms that support this, and calls @done_cb
 599  * from a signal handler for the ::response signal of the dialog.
 600  *
 601  * Since: 2.10
 602  */
 603 void
 604 gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
 605                                        GtkPageSetup         *page_setup,
 606                                        GtkPrintSettings     *settings,
 607                                        GtkPageSetupDoneFunc  done_cb,
 608                                        gpointer              data)
 609 {
 610   GtkWidget *dialog;
 611   PageSetupResponseData *rdata;
 612
 613   dialog = get_page_setup_dialog (parent, page_setup, settings);
 614   gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
 615
 616   rdata = g_new (PageSetupResponseData, 1);
 617   rdata->page_setup = NULL;
 618   rdata->done_cb = done_cb;
 619   rdata->data = data;
 620   rdata->destroy = page_setup_data_free;
 621
 622   g_signal_connect (dialog, "response",
 623                     G_CALLBACK (handle_page_setup_response), rdata);
 624
 625   gtk_window_present (GTK_WINDOW (dialog));
 626  }
 627
 628 struct _PrinterFinder {
 629   gboolean found_printer;
 630   GFunc func;
 631   gpointer data;
 632   char *printer_name;
 633   GList *backends;
 634   guint timeout_tag;
 635   GtkPrinter *printer;
 636   GtkPrinter *default_printer;
 637   GtkPrinter *first_printer;
 638 };
 639
 640 static gboolean
 641 find_printer_idle (gpointer data)
 642 {
 643   PrinterFinder *finder = data;
 644   GtkPrinter *printer;
 645
 646   if (finder->printer != NULL)
 647     printer = finder->printer;
 648   else if (finder->default_printer != NULL)
 649     printer = finder->default_printer;
 650   else if (finder->first_printer != NULL)
 651     printer = finder->first_printer;
 652   else
 653     printer = NULL;
 654
 655   finder->func (printer, finder->data);
 656
 657   printer_finder_free (finder);
 658
 659   return FALSE;
 660 }
 661
 662 static void
 663 printer_added_cb (GtkPrintBackend *backend,
 664                   GtkPrinter      *printer,
 665                   PrinterFinder   *finder)
 666 {
 667   if (gtk_printer_is_virtual (printer) ||
 668       finder->found_printer)
 669     return;
 670
 671   if (finder->printer_name != NULL &&
 672       strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
 673     {
 674       finder->printer = g_object_ref (printer);
 675       finder->found_printer = TRUE;
 676     }
 677   else if (finder->default_printer == NULL &&
 678            gtk_printer_is_default (printer))
 679     {
 680       finder->default_printer = g_object_ref (printer);
 681       if (finder->printer_name == NULL)
 682         finder->found_printer = TRUE;
 683     }
 684   else
 685     if (finder->first_printer == NULL)
 686       finder->first_printer = g_object_ref (printer);
 687
 688   if (finder->found_printer)
 689     g_idle_add (find_printer_idle, finder);
 690 }
 691
 692 static void
 693 printer_list_done_cb (GtkPrintBackend *backend,
 694                       PrinterFinder   *finder)
 695 {
 696   finder->backends = g_list_remove (finder->backends, backend);
 697
 698   g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 699   g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 700
 701   gtk_print_backend_destroy (backend);
 702   g_object_unref (backend);
 703
 704   if (finder->backends == NULL && !finder->found_printer)
 705     g_idle_add (find_printer_idle, finder);
 706 }
 707
 708 static void
 709 find_printer_init (PrinterFinder *finder,
 710                    GtkPrintBackend *backend)
 711 {
 712   GList *list;
 713   GList *node;
 714
 715   list = gtk_print_backend_get_printer_list (backend);
 716
 717   node = list;
 718   while (node != NULL)
 719     {
 720       printer_added_cb (backend, node->data, finder);
 721       node = node->next;
 722
 723       if (finder->found_printer)
 724         break;
 725     }
 726
 727   g_list_free (list);
 728
 729   if (gtk_print_backend_printer_list_is_done (backend))
 730     {
 731       finder->backends = g_list_remove (finder->backends, backend);
 732       gtk_print_backend_destroy (backend);
 733       g_object_unref (backend);
 734     }
 735   else
 736     {
 737       g_signal_connect (backend,
 738                         "printer-added",
 739                         (GCallback) printer_added_cb,
 740                         finder);
 741       g_signal_connect (backend,
 742                         "printer-list-done",
 743                         (GCallback) printer_list_done_cb,
 744                         finder);
 745     }
 746
 747 }
 748
 749 static void
 750 printer_finder_free (PrinterFinder *finder)
 751 {
 752   GList *l;
 753
 754   g_free (finder->printer_name);
 755
 756   if (finder->printer)
 757     g_object_unref (finder->printer);
 758
 759   if (finder->default_printer)
 760     g_object_unref (finder->default_printer);
 761
 762   if (finder->first_printer)
 763     g_object_unref (finder->first_printer);
 764
 765   for (l = finder->backends; l != NULL; l = l->next)
 766     {
 767       GtkPrintBackend *backend = l->data;
 768       g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
 769       g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
 770       gtk_print_backend_destroy (backend);
 771       g_object_unref (backend);
 772     }
 773
 774   g_list_free (finder->backends);
 775
 776   g_free (finder);
 777 }
 778
 779 static void
 780 find_printer (const char *printer,
 781               GFunc func,
 782               gpointer data)
 783 {
 784   GList *node, *next;
 785   PrinterFinder *finder;
 786
 787   finder = g_new0 (PrinterFinder, 1);
 788
 789   finder->printer_name = g_strdup (printer);
 790   finder->func = func;
 791   finder->data = data;
 792
 793   finder->backends = NULL;
 794   if (g_module_supported ())
 795     finder->backends = gtk_print_backend_load_modules ();
 796
 797   for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
 798     {
 799       next = node->next;
 800       find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
 801     }
 802
 803   if (finder->backends == NULL && !finder->found_printer)
 804     g_idle_add (find_printer_idle, finder);
 805 }
 806
 807 #define __GTK_PRINT_OPERATION_UNIX_C__
 808 #include "gtkaliasdef.c"