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 <glib/gstdio.h>
  34 #include "gtkprintoperation-private.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 ((op->priv->manual_number_up < 2) ||
  91       (op->priv->page_position % op->priv->manual_number_up == 0))
  92     {
  93       if (type == CAIRO_SURFACE_TYPE_PS)
  94         cairo_ps_surface_set_size (op_unix->surface, w, h);
  95       else if (type == CAIRO_SURFACE_TYPE_PDF)
  96         cairo_pdf_surface_set_size (op_unix->surface, w, h);
  97     }
  98 }
  99
 100 static void
 101 unix_end_page (GtkPrintOperation *op,
 102                GtkPrintContext   *print_context)
 103 {
 104   cairo_t *cr;
 105
 106   cr = gtk_print_context_get_cairo_context (print_context);
 107
 108   if ((op->priv->manual_number_up < 2) ||
 109       ((op->priv->page_position + 1) % op->priv->manual_number_up == 0) ||
 110       (op->priv->page_position == op->priv->nr_of_pages_to_print - 1))
 111     cairo_show_page (cr);
 112 }
 113
 114 static void
 115 op_unix_free (GtkPrintOperationUnix *op_unix)
 116 {
 117   if (op_unix->job)
 118     {
 119       g_signal_handler_disconnect (op_unix->job,
 120                                    op_unix->job_status_changed_tag);
 121       g_object_unref (op_unix->job);
 122     }
 123
 124   g_free (op_unix);
 125 }
 126
 127 static gchar *
 128 shell_command_substitute_file (const gchar *cmd,
 129                                const gchar *pdf_filename,
 130                                const gchar *settings_filename,
 131                                gboolean    *pdf_filename_replaced,
 132                                gboolean    *settings_filename_replaced)
 133 {
 134   const gchar *inptr, *start;
 135   GString *final;
 136
 137   g_return_val_if_fail (cmd != NULL, NULL);
 138   g_return_val_if_fail (pdf_filename != NULL, NULL);
 139   g_return_val_if_fail (settings_filename != NULL, NULL);
 140
 141   final = g_string_new (NULL);
 142
 143   *pdf_filename_replaced = FALSE;
 144   *settings_filename_replaced = FALSE;
 145
 146   start = inptr = cmd;
 147   while ((inptr = strchr (inptr, '%')) != NULL)
 148     {
 149       g_string_append_len (final, start, inptr - start);
 150       inptr++;
 151       switch (*inptr)
 152         {
 153           case 'f':
 154             g_string_append (final, pdf_filename);
 155             *pdf_filename_replaced = TRUE;
 156             break;
 157
 158           case 's':
 159             g_string_append (final, settings_filename);
 160             *settings_filename_replaced = TRUE;
 161             break;
 162
 163           case '%':
 164             g_string_append_c (final, '%');
 165             break;
 166
 167           default:
 168             g_string_append_c (final, '%');
 169             if (*inptr)
 170               g_string_append_c (final, *inptr);
 171             break;
 172         }
 173       if (*inptr)
 174         inptr++;
 175       start = inptr;
 176     }
 177   g_string_append (final, start);
 178
 179   return g_string_free (final, FALSE);
 180 }
 181
 182 void
 183 _gtk_print_operation_platform_backend_launch_preview (GtkPrintOperation *op,
 184                                                       cairo_surface_t   *surface,
 185                                                       GtkWindow         *parent,
 186                                                       const gchar       *filename)
 187 {
 188   gint argc;
 189   gchar **argv;
 190   gchar *cmd;
 191   gchar *preview_cmd;
 192   GtkSettings *settings;
 193   GtkPrintSettings *print_settings;
 194   GtkPageSetup *page_setup;
 195   GKeyFile *key_file = NULL;
 196   gchar *data = NULL;
 197   gsize data_len;
 198   gchar *settings_filename = NULL;
 199   gchar *quoted_filename;
 200   gchar *quoted_settings_filename;
 201   gboolean filename_used = FALSE;
 202   gboolean settings_used = FALSE;
 203   GdkScreen *screen;
 204   GError *error = NULL;
 205   gint fd;
 206   gboolean retval;
 207
 208   cairo_surface_destroy (surface);
 209
 210   if (parent)
 211     screen = gtk_window_get_screen (parent);
 212   else
 213     screen = gdk_screen_get_default ();
 214
 215   fd = g_file_open_tmp ("settingsXXXXXX.ini", &settings_filename, &error);
 216   if (fd < 0)
 217     goto out;
 218
 219   key_file = g_key_file_new ();
 220
 221   print_settings = gtk_print_operation_get_print_settings (op);
 222   gtk_print_settings_to_key_file (print_settings, key_file, NULL);
 223
 224   page_setup = gtk_print_context_get_page_setup (op->priv->print_context);
 225   gtk_page_setup_to_key_file (page_setup, key_file, NULL);
 226
 227   g_key_file_set_string (key_file, "Print Job", "title", op->priv->job_name);
 228
 229   data = g_key_file_to_data (key_file, &data_len, &error);
 230   if (!data)
 231     goto out;
 232
 233   retval = g_file_set_contents (settings_filename, data, data_len, &error);
 234   if (!retval)
 235     goto out;
 236
 237   settings = gtk_settings_get_for_screen (screen);
 238   g_object_get (settings, "gtk-print-preview-command", &preview_cmd, NULL);
 239
 240   quoted_filename = g_shell_quote (filename);
 241   quoted_settings_filename = g_shell_quote (settings_filename);
 242   cmd = shell_command_substitute_file (preview_cmd, quoted_filename, quoted_settings_filename, &filename_used, &settings_used);
 243   g_shell_parse_argv (cmd, &argc, &argv, &error);
 244
 245   g_free (preview_cmd);
 246   g_free (quoted_filename);
 247   g_free (quoted_settings_filename);
 248   g_free (cmd);
 249
 250   if (error != NULL)
 251     goto out;
 252
 253   gdk_spawn_on_screen (screen, NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, &error);
 254
 255   g_strfreev (argv);
 256
 257  out:
 258   if (error != NULL)
 259     {
 260       GtkWidget *edialog;
 261       edialog = gtk_message_dialog_new (parent,
 262                                         GTK_DIALOG_DESTROY_WITH_PARENT,
 263                                         GTK_MESSAGE_ERROR,
 264                                         GTK_BUTTONS_CLOSE,
 265                                         _("Error launching preview") /* FIXME better text */);
 266       gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
 267                                                 "%s", error->message);
 268       g_signal_connect (edialog, "response",
 269                         G_CALLBACK (gtk_widget_destroy), NULL);
 270
 271       gtk_window_present (GTK_WINDOW (edialog));
 272
 273       g_error_free (error);
 274
 275       filename_used = FALSE;
 276       settings_used = FALSE;
 277    }
 278
 279   if (!filename_used)
 280     g_unlink (filename);
 281
 282   if (!settings_used)
 283     g_unlink (settings_filename);
 284
 285   if (fd > 0)
 286     close (fd);
 287
 288   if (key_file)
 289     g_key_file_free (key_file);
 290   g_free (data);
 291   g_free (settings_filename);
 292 }
 293
 294 static void
 295 unix_finish_send  (GtkPrintJob *job,
 296                    gpointer     user_data,
 297                    GError      *error)
 298 {
 299   GtkPrintOperation *op = (GtkPrintOperation *) user_data;
 300   GtkPrintOperationUnix *op_unix = op->priv->platform_data;
 301
 302   if (error != NULL)
 303     {
 304       GtkWidget *edialog;
 305       edialog = gtk_message_dialog_new (op_unix->parent,
 306                                         GTK_DIALOG_DESTROY_WITH_PARENT,
 307                                         GTK_MESSAGE_ERROR,
 308                                         GTK_BUTTONS_CLOSE,
 309                                         _("Error printing") /* FIXME better text */);
 310       gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
 311                                                 "%s", error->message);
 312       gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
 313       g_signal_connect (edialog, "response",
 314                         G_CALLBACK (gtk_widget_destroy), NULL);
 315
 316       gtk_window_present (GTK_WINDOW (edialog));
 317     }
 318
 319   op_unix->data_sent = TRUE;
 320
 321   if (op_unix->loop)
 322     g_main_loop_quit (op_unix->loop);
 323
 324   g_object_unref (op);
 325 }
 326
 327 static void
 328 unix_end_run (GtkPrintOperation *op,
 329               gboolean           wait,
 330               gboolean           cancelled)
 331 {
 332   GtkPrintOperationUnix *op_unix = op->priv->platform_data;
 333
 334   cairo_surface_finish (op_unix->surface);
 335
 336   if (cancelled)
 337     return;
 338
 339   if (wait)
 340     op_unix->loop = g_main_loop_new (NULL, FALSE);
 341
 342   /* TODO: Check for error */
 343   if (op_unix->job != NULL)
 344     {
 345       g_object_ref (op);
 346       gtk_print_job_send (op_unix->job,
 347                           unix_finish_send,
 348                           op, NULL);
 349     }
 350
 351   if (wait)
 352     {
 353       g_object_ref (op);
 354       if (!op_unix->data_sent)
 355         {
 356           GDK_THREADS_LEAVE ();
 357           g_main_loop_run (op_unix->loop);
 358           GDK_THREADS_ENTER ();
 359         }
 360       g_main_loop_unref (op_unix->loop);
 361       op_unix->loop = NULL;
 362       g_object_unref (op);
 363     }
 364 }
 365
 366 static void
 367 job_status_changed_cb (GtkPrintJob       *job,
 368                        GtkPrintOperation *op)
 369 {
 370   _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 371 }
 372
 373
 374 static void
 375 print_setup_changed_cb (GtkPrintUnixDialog *print_dialog,
 376                         GParamSpec         *pspec,
 377                         gpointer            user_data)
 378 {
 379   GtkPageSetup             *page_setup;
 380   GtkPrintSettings         *print_settings;
 381   GtkPrintOperation        *op = user_data;
 382   GtkPrintOperationPrivate *priv = op->priv;
 383
 384   page_setup = gtk_print_unix_dialog_get_page_setup (print_dialog);
 385   print_settings = gtk_print_unix_dialog_get_settings (print_dialog);
 386
 387   g_signal_emit_by_name (op,
 388                          "update-custom-widget",
 389                          priv->custom_widget,
 390                          page_setup,
 391                          print_settings);
 392 }
 393
 394 static GtkWidget *
 395 get_print_dialog (GtkPrintOperation *op,
 396                   GtkWindow         *parent)
 397 {
 398   GtkPrintOperationPrivate *priv = op->priv;
 399   GtkWidget *pd, *label;
 400   const gchar *custom_tab_label;
 401
 402   pd = gtk_print_unix_dialog_new (NULL, parent);
 403
 404   gtk_print_unix_dialog_set_manual_capabilities (GTK_PRINT_UNIX_DIALOG (pd),
 405                                                  GTK_PRINT_CAPABILITY_PAGE_SET |
 406                                                  GTK_PRINT_CAPABILITY_COPIES |
 407                                                  GTK_PRINT_CAPABILITY_COLLATE |
 408                                                  GTK_PRINT_CAPABILITY_REVERSE |
 409                                                  GTK_PRINT_CAPABILITY_SCALE |
 410                                                  GTK_PRINT_CAPABILITY_PREVIEW |
 411                                                  GTK_PRINT_CAPABILITY_NUMBER_UP |
 412                                                  GTK_PRINT_CAPABILITY_NUMBER_UP_LAYOUT);
 413
 414   if (priv->print_settings)
 415     gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG (pd),
 416                                         priv->print_settings);
 417
 418   if (priv->default_page_setup)
 419     gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
 420                                           priv->default_page_setup);
 421
 422   gtk_print_unix_dialog_set_embed_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
 423                                               priv->embed_page_setup);
 424
 425   gtk_print_unix_dialog_set_current_page (GTK_PRINT_UNIX_DIALOG (pd),
 426                                           priv->current_page);
 427
 428   gtk_print_unix_dialog_set_support_selection (GTK_PRINT_UNIX_DIALOG (pd),
 429                                                priv->support_selection);
 430
 431   gtk_print_unix_dialog_set_has_selection (GTK_PRINT_UNIX_DIALOG (pd),
 432                                            priv->has_selection);
 433
 434   g_signal_emit_by_name (op, "create-custom-widget",
 435                          &priv->custom_widget);
 436
 437   if (priv->custom_widget)
 438     {
 439       custom_tab_label = priv->custom_tab_label;
 440
 441       if (custom_tab_label == NULL)
 442         {
 443           custom_tab_label = g_get_application_name ();
 444           if (custom_tab_label == NULL)
 445             custom_tab_label = _("Application");
 446         }
 447
 448       label = gtk_label_new (custom_tab_label);
 449
 450       gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
 451                                             priv->custom_widget, label);
 452
 453       g_signal_connect (pd, "notify::selected-printer", (GCallback) print_setup_changed_cb, op);
 454       g_signal_connect (pd, "notify::page-setup", (GCallback) print_setup_changed_cb, op);
 455     }
 456
 457   return pd;
 458 }
 459
 460 typedef struct
 461 {
 462   GtkPrintOperation           *op;
 463   gboolean                     do_print;
 464   gboolean                     do_preview;
 465   GtkPrintOperationResult      result;
 466   GtkPrintOperationPrintFunc   print_cb;
 467   GDestroyNotify               destroy;
 468   GtkWindow                   *parent;
 469   GMainLoop                   *loop;
 470 } PrintResponseData;
 471
 472 static void
 473 print_response_data_free (gpointer data)
 474 {
 475   PrintResponseData *rdata = data;
 476
 477   g_object_unref (rdata->op);
 478   g_free (rdata);
 479 }
 480
 481 static void
 482 finish_print (PrintResponseData *rdata,
 483               GtkPrinter        *printer,
 484               GtkPageSetup      *page_setup,
 485               GtkPrintSettings  *settings,
 486               gboolean           page_setup_set)
 487 {
 488   GtkPrintOperation *op = rdata->op;
 489   GtkPrintOperationPrivate *priv = op->priv;
 490   GtkPrintJob *job;
 491
 492   if (rdata->do_print)
 493     {
 494       gtk_print_operation_set_print_settings (op, settings);
 495       priv->print_context = _gtk_print_context_new (op);
 496
 497       if (page_setup != NULL &&
 498           (gtk_print_operation_get_default_page_setup (op) == NULL ||
 499            page_setup_set))
 500         gtk_print_operation_set_default_page_setup (op, page_setup);
 501
 502       _gtk_print_context_set_page_setup (priv->print_context, page_setup);
 503
 504       if (!rdata->do_preview)
 505         {
 506           GtkPrintOperationUnix *op_unix;
 507           cairo_t *cr;
 508
 509           op_unix = g_new0 (GtkPrintOperationUnix, 1);
 510           priv->platform_data = op_unix;
 511           priv->free_platform_data = (GDestroyNotify) op_unix_free;
 512           op_unix->parent = rdata->parent;
 513
 514           priv->start_page = unix_start_page;
 515           priv->end_page = unix_end_page;
 516           priv->end_run = unix_end_run;
 517
 518           job = gtk_print_job_new (priv->job_name, printer, settings, page_setup);
 519           op_unix->job = job;
 520           gtk_print_job_set_track_print_status (job, priv->track_print_status);
 521
 522           op_unix->surface = gtk_print_job_get_surface (job, &priv->error);
 523           if (op_unix->surface == NULL)
 524             {
 525               rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
 526               rdata->do_print = FALSE;
 527               goto out;
 528             }
 529
 530           cr = cairo_create (op_unix->surface);
 531           gtk_print_context_set_cairo_context (priv->print_context, cr, 72, 72);
 532           cairo_destroy (cr);
 533
 534           _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 535
 536           op_unix->job_status_changed_tag =
 537             g_signal_connect (job, "status-changed",
 538                               G_CALLBACK (job_status_changed_cb), op);
 539
 540           priv->print_pages = job->print_pages;
 541           priv->page_ranges = job->page_ranges;
 542           priv->num_page_ranges = job->num_page_ranges;
 543
 544           priv->manual_num_copies = job->num_copies;
 545           priv->manual_collation = job->collate;
 546           priv->manual_reverse = job->reverse;
 547           priv->manual_page_set = job->page_set;
 548           priv->manual_scale = job->scale;
 549           priv->manual_orientation = job->rotate_to_orientation;
 550           priv->manual_number_up = job->number_up;
 551           priv->manual_number_up_layout = job->number_up_layout;
 552         }
 553     }
 554  out:
 555   if (rdata->print_cb)
 556     rdata->print_cb (op, rdata->parent, rdata->do_print, rdata->result);
 557
 558   if (rdata->destroy)
 559     rdata->destroy (rdata);
 560 }
 561
 562 static void
 563 handle_print_response (GtkWidget *dialog,
 564                        gint       response,
 565                        gpointer   data)
 566 {
 567   GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
 568   PrintResponseData *rdata = data;
 569   GtkPrintSettings *settings = NULL;
 570   GtkPageSetup *page_setup = NULL;
 571   GtkPrinter *printer = NULL;
 572   gboolean page_setup_set = FALSE;
 573
 574   if (response == GTK_RESPONSE_OK)
 575     {
 576       printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
 577
 578       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 579       rdata->do_preview = FALSE;
 580       if (printer != NULL)
 581         rdata->do_print = TRUE;
 582     }
 583   else if (response == GTK_RESPONSE_APPLY)
 584     {
 585       /* print preview */
 586       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 587       rdata->do_preview = TRUE;
 588       rdata->do_print = TRUE;
 589
 590       rdata->op->priv->action = GTK_PRINT_OPERATION_ACTION_PREVIEW;
 591     }
 592
 593   if (rdata->do_print)
 594     {
 595       settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
 596       page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
 597       page_setup_set = gtk_print_unix_dialog_get_page_setup_set (GTK_PRINT_UNIX_DIALOG (pd));
 598
 599       g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
 600     }
 601
 602   finish_print (rdata, printer, page_setup, settings, page_setup_set);
 603
 604   if (settings)
 605     g_object_unref (settings);
 606
 607   gtk_widget_destroy (GTK_WIDGET (pd));
 608
 609 }
 610
 611
 612 static void
 613 found_printer (GtkPrinter        *printer,
 614                PrintResponseData *rdata)
 615 {
 616   GtkPrintOperation *op = rdata->op;
 617   GtkPrintOperationPrivate *priv = op->priv;
 618   GtkPrintSettings *settings = NULL;
 619   GtkPageSetup *page_setup = NULL;
 620
 621   if (rdata->loop)
 622     g_main_loop_quit (rdata->loop);
 623
 624   if (printer != NULL)
 625     {
 626       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 627
 628       rdata->do_print = TRUE;
 629
 630       if (priv->print_settings)
 631         settings = gtk_print_settings_copy (priv->print_settings);
 632       else
 633         settings = gtk_print_settings_new ();
 634
 635       gtk_print_settings_set_printer (settings,
 636                                       gtk_printer_get_name (printer));
 637
 638       if (priv->default_page_setup)
 639         page_setup = gtk_page_setup_copy (priv->default_page_setup);
 640       else
 641         page_setup = gtk_page_setup_new ();
 642   }
 643
 644   finish_print (rdata, printer, page_setup, settings, FALSE);
 645
 646   if (settings)
 647     g_object_unref (settings);
 648
 649   if (page_setup)
 650     g_object_unref (page_setup);
 651 }
 652
 653 void
 654 _gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
 655                                                         gboolean                    show_dialog,
 656                                                         GtkWindow                  *parent,
 657                                                         GtkPrintOperationPrintFunc  print_cb)
 658 {
 659   GtkWidget *pd;
 660   PrintResponseData *rdata;
 661   const gchar *printer_name;
 662
 663   rdata = g_new (PrintResponseData, 1);
 664   rdata->op = g_object_ref (op);
 665   rdata->do_print = FALSE;
 666   rdata->do_preview = FALSE;
 667   rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 668   rdata->print_cb = print_cb;
 669   rdata->parent = parent;
 670   rdata->loop = NULL;
 671   rdata->destroy = print_response_data_free;
 672
 673   if (show_dialog)
 674     {
 675       pd = get_print_dialog (op, parent);
 676       gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
 677
 678       g_signal_connect (pd, "response",
 679                         G_CALLBACK (handle_print_response), rdata);
 680
 681       gtk_window_present (GTK_WINDOW (pd));
 682     }
 683   else
 684     {
 685       printer_name = NULL;
 686       if (op->priv->print_settings)
 687         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 688
 689       find_printer (printer_name, (GFunc) found_printer, rdata);
 690     }
 691 }
 692
 693 static cairo_status_t
 694 write_preview (void                *closure,
 695                const unsigned char *data,
 696                unsigned int         length)
 697 {
 698   gint fd = GPOINTER_TO_INT (closure);
 699   gssize written;
 700
 701   while (length > 0)
 702     {
 703       written = write (fd, data, length);
 704
 705       if (written == -1)
 706         {
 707           if (errno == EAGAIN || errno == EINTR)
 708             continue;
 709
 710           return CAIRO_STATUS_WRITE_ERROR;
 711         }
 712
 713       data += written;
 714       length -= written;
 715     }
 716
 717   return CAIRO_STATUS_SUCCESS;
 718 }
 719
 720 static void
 721 close_preview (void *data)
 722 {
 723   gint fd = GPOINTER_TO_INT (data);
 724
 725   close (fd);
 726 }
 727
 728 cairo_surface_t *
 729 _gtk_print_operation_platform_backend_create_preview_surface (GtkPrintOperation *op,
 730                                                               GtkPageSetup      *page_setup,
 731                                                               gdouble           *dpi_x,
 732                                                               gdouble           *dpi_y,
 733                                                               gchar            **target)
 734 {
 735   gchar *filename;
 736   gint fd;
 737   GtkPaperSize *paper_size;
 738   gdouble w, h;
 739   cairo_surface_t *surface;
 740   static cairo_user_data_key_t key;
 741
 742   filename = g_build_filename (g_get_tmp_dir (), "previewXXXXXX.pdf", NULL);
 743   fd = g_mkstemp (filename);
 744
 745   if (fd < 0)
 746     {
 747       g_free (filename);
 748       return NULL;
 749     }
 750
 751   *target = filename;
 752
 753   paper_size = gtk_page_setup_get_paper_size (page_setup);
 754   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
 755   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
 756
 757   *dpi_x = *dpi_y = 72;
 758   surface = cairo_pdf_surface_create_for_stream (write_preview, GINT_TO_POINTER (fd), w, h);
 759
 760   cairo_surface_set_user_data (surface, &key, GINT_TO_POINTER (fd), close_preview);
 761
 762   return surface;
 763 }
 764
 765 void
 766 _gtk_print_operation_platform_backend_preview_start_page (GtkPrintOperation *op,
 767                                                           cairo_surface_t   *surface,
 768                                                           cairo_t           *cr)
 769 {
 770 }
 771
 772 void
 773 _gtk_print_operation_platform_backend_preview_end_page (GtkPrintOperation *op,
 774                                                         cairo_surface_t   *surface,
 775                                                         cairo_t           *cr)
 776 {
 777   cairo_show_page (cr);
 778 }
 779
 780 void
 781 _gtk_print_operation_platform_backend_resize_preview_surface (GtkPrintOperation *op,
 782                                                               GtkPageSetup      *page_setup,
 783                                                               cairo_surface_t   *surface)
 784 {
 785   GtkPaperSize *paper_size;
 786   gdouble w, h;
 787
 788   paper_size = gtk_page_setup_get_paper_size (page_setup);
 789   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
 790   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
 791   cairo_pdf_surface_set_size (surface, w, h);
 792 }
 793
 794
 795 GtkPrintOperationResult
 796 _gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
 797                                                   gboolean           show_dialog,
 798                                                   GtkWindow         *parent,
 799                                                   gboolean          *do_print)
 800  {
 801   GtkWidget *pd;
 802   PrintResponseData rdata;
 803   gint response;
 804   const gchar *printer_name;
 805
 806   rdata.op = op;
 807   rdata.do_print = FALSE;
 808   rdata.do_preview = FALSE;
 809   rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 810   rdata.print_cb = NULL;
 811   rdata.destroy = NULL;
 812   rdata.parent = parent;
 813   rdata.loop = NULL;
 814
 815   if (show_dialog)
 816     {
 817       pd = get_print_dialog (op, parent);
 818
 819       response = gtk_dialog_run (GTK_DIALOG (pd));
 820       handle_print_response (pd, response, &rdata);
 821     }
 822   else
 823     {
 824       printer_name = NULL;
 825       if (op->priv->print_settings)
 826         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 827
 828       rdata.loop = g_main_loop_new (NULL, FALSE);
 829       find_printer (printer_name,
 830                     (GFunc) found_printer, &rdata);
 831
 832       GDK_THREADS_LEAVE ();
 833       g_main_loop_run (rdata.loop);
 834       GDK_THREADS_ENTER ();
 835
 836       g_main_loop_unref (rdata.loop);
 837       rdata.loop = NULL;
 838     }
 839
 840   *do_print = rdata.do_print;
 841
 842   return rdata.result;
 843 }
 844
 845
 846 typedef struct
 847 {
 848   GtkPageSetup         *page_setup;
 849   GtkPageSetupDoneFunc  done_cb;
 850   gpointer              data;
 851   GDestroyNotify        destroy;
 852 } PageSetupResponseData;
 853
 854 static void
 855 page_setup_data_free (gpointer data)
 856 {
 857   PageSetupResponseData *rdata = data;
 858
 859   if (rdata->page_setup)
 860     g_object_unref (rdata->page_setup);
 861
 862   g_free (rdata);
 863 }
 864
 865 static void
 866 handle_page_setup_response (GtkWidget *dialog,
 867                             gint       response,
 868                             gpointer   data)
 869 {
 870   GtkPageSetupUnixDialog *psd;
 871   PageSetupResponseData *rdata = data;
 872
 873   psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
 874   if (response == GTK_RESPONSE_OK)
 875     rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
 876
 877   gtk_widget_destroy (dialog);
 878
 879   if (rdata->done_cb)
 880     rdata->done_cb (rdata->page_setup, rdata->data);
 881
 882   if (rdata->destroy)
 883     rdata->destroy (rdata);
 884 }
 885
 886 static GtkWidget *
 887 get_page_setup_dialog (GtkWindow        *parent,
 888                        GtkPageSetup     *page_setup,
 889                        GtkPrintSettings *settings)
 890 {
 891   GtkWidget *dialog;
 892
 893   dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
 894   if (page_setup)
 895     gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 896                                                page_setup);
 897   gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 898                                                  settings);
 899
 900   return dialog;
 901 }
 902
 903 /**
 904  * gtk_print_run_page_setup_dialog:
 905  * @parent: transient parent, or %NULL
 906  * @page_setup: an existing #GtkPageSetup, or %NULL
 907  * @settings: a #GtkPrintSettings
 908  *
 909  * Runs a page setup dialog, letting the user modify the values from
 910  * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
 911  * is identical to the passed in @page_setup, otherwise it contains the
 912  * modifications done in the dialog.
 913  *
 914  * Note that this function may use a recursive mainloop to show the page
 915  * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
 916  * a problem.
 917  *
 918  * Return value: a new #GtkPageSetup
 919  *
 920  * Since: 2.10
 921  */
 922 GtkPageSetup *
 923 gtk_print_run_page_setup_dialog (GtkWindow        *parent,
 924                                  GtkPageSetup     *page_setup,
 925                                  GtkPrintSettings *settings)
 926 {
 927   GtkWidget *dialog;
 928   gint response;
 929   PageSetupResponseData rdata;
 930
 931   rdata.page_setup = NULL;
 932   rdata.done_cb = NULL;
 933   rdata.data = NULL;
 934   rdata.destroy = NULL;
 935
 936   dialog = get_page_setup_dialog (parent, page_setup, settings);
 937   response = gtk_dialog_run (GTK_DIALOG (dialog));
 938   handle_page_setup_response (dialog, response, &rdata);
 939
 940   if (rdata.page_setup)
 941     return rdata.page_setup;
 942   else if (page_setup)
 943     return gtk_page_setup_copy (page_setup);
 944   else
 945     return gtk_page_setup_new ();
 946 }
 947
 948 /**
 949  * gtk_print_run_page_setup_dialog_async:
 950  * @parent: transient parent, or %NULL
 951  * @page_setup: an existing #GtkPageSetup, or %NULL
 952  * @settings: a #GtkPrintSettings
 953  * @done_cb: a function to call when the user saves the modified page setup
 954  * @data: user data to pass to @done_cb
 955  *
 956  * Runs a page setup dialog, letting the user modify the values from @page_setup.
 957  *
 958  * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after
 959  * showing the page setup dialog on platforms that support this, and calls @done_cb
 960  * from a signal handler for the ::response signal of the dialog.
 961  *
 962  * Since: 2.10
 963  */
 964 void
 965 gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
 966                                        GtkPageSetup         *page_setup,
 967                                        GtkPrintSettings     *settings,
 968                                        GtkPageSetupDoneFunc  done_cb,
 969                                        gpointer              data)
 970 {
 971   GtkWidget *dialog;
 972   PageSetupResponseData *rdata;
 973
 974   dialog = get_page_setup_dialog (parent, page_setup, settings);
 975   gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
 976
 977   rdata = g_new (PageSetupResponseData, 1);
 978   rdata->page_setup = NULL;
 979   rdata->done_cb = done_cb;
 980   rdata->data = data;
 981   rdata->destroy = page_setup_data_free;
 982
 983   g_signal_connect (dialog, "response",
 984                     G_CALLBACK (handle_page_setup_response), rdata);
 985
 986   gtk_window_present (GTK_WINDOW (dialog));
 987  }
 988
 989 struct _PrinterFinder
 990 {
 991   gboolean found_printer;
 992   GFunc func;
 993   gpointer data;
 994   gchar *printer_name;
 995   GList *backends;
 996   guint timeout_tag;
 997   GtkPrinter *printer;
 998   GtkPrinter *default_printer;
 999   GtkPrinter *first_printer;
1000 };
1001
1002 static gboolean
1003 find_printer_idle (gpointer data)
1004 {
1005   PrinterFinder *finder = data;
1006   GtkPrinter *printer;
1007
1008   if (finder->printer != NULL)
1009     printer = finder->printer;
1010   else if (finder->default_printer != NULL)
1011     printer = finder->default_printer;
1012   else if (finder->first_printer != NULL)
1013     printer = finder->first_printer;
1014   else
1015     printer = NULL;
1016
1017   finder->func (printer, finder->data);
1018
1019   printer_finder_free (finder);
1020
1021   return FALSE;
1022 }
1023
1024 static void
1025 printer_added_cb (GtkPrintBackend *backend,
1026                   GtkPrinter      *printer,
1027                   PrinterFinder   *finder)
1028 {
1029   if (finder->found_printer)
1030     return;
1031
1032   /* FIXME this skips "Print to PDF" - is this intentional ? */
1033   if (gtk_printer_is_virtual (printer))
1034     return;
1035
1036   if (finder->printer_name != NULL &&
1037       strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
1038     {
1039       finder->printer = g_object_ref (printer);
1040       finder->found_printer = TRUE;
1041     }
1042   else if (finder->default_printer == NULL &&
1043            gtk_printer_is_default (printer))
1044     {
1045       finder->default_printer = g_object_ref (printer);
1046       if (finder->printer_name == NULL)
1047         finder->found_printer = TRUE;
1048     }
1049   else
1050     if (finder->first_printer == NULL)
1051       finder->first_printer = g_object_ref (printer);
1052
1053   if (finder->found_printer)
1054     g_idle_add (find_printer_idle, finder);
1055 }
1056
1057 static void
1058 printer_list_done_cb (GtkPrintBackend *backend,
1059                       PrinterFinder   *finder)
1060 {
1061   finder->backends = g_list_remove (finder->backends, backend);
1062
1063   g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
1064   g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
1065
1066   gtk_print_backend_destroy (backend);
1067   g_object_unref (backend);
1068
1069   if (finder->backends == NULL && !finder->found_printer)
1070     g_idle_add (find_printer_idle, finder);
1071 }
1072
1073 static void
1074 find_printer_init (PrinterFinder   *finder,
1075                    GtkPrintBackend *backend)
1076 {
1077   GList *list;
1078   GList *node;
1079
1080   list = gtk_print_backend_get_printer_list (backend);
1081
1082   node = list;
1083   while (node != NULL)
1084     {
1085       printer_added_cb (backend, node->data, finder);
1086       node = node->next;
1087
1088       if (finder->found_printer)
1089         break;
1090     }
1091
1092   g_list_free (list);
1093
1094   if (gtk_print_backend_printer_list_is_done (backend))
1095     {
1096       finder->backends = g_list_remove (finder->backends, backend);
1097       gtk_print_backend_destroy (backend);
1098       g_object_unref (backend);
1099     }
1100   else
1101     {
1102       g_signal_connect (backend, "printer-added",
1103                         (GCallback) printer_added_cb,
1104                         finder);
1105       g_signal_connect (backend, "printer-list-done",
1106                         (GCallback) printer_list_done_cb,
1107                         finder);
1108     }
1109
1110 }
1111
1112 static void
1113 printer_finder_free (PrinterFinder *finder)
1114 {
1115   GList *l;
1116
1117   g_free (finder->printer_name);
1118
1119   if (finder->printer)
1120     g_object_unref (finder->printer);
1121
1122   if (finder->default_printer)
1123     g_object_unref (finder->default_printer);
1124
1125   if (finder->first_printer)
1126     g_object_unref (finder->first_printer);
1127
1128   for (l = finder->backends; l != NULL; l = l->next)
1129     {
1130       GtkPrintBackend *backend = l->data;
1131       g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
1132       g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
1133       gtk_print_backend_destroy (backend);
1134       g_object_unref (backend);
1135     }
1136
1137   g_list_free (finder->backends);
1138
1139   g_free (finder);
1140 }
1141
1142 static void
1143 find_printer (const gchar *printer,
1144               GFunc        func,
1145               gpointer     data)
1146 {
1147   GList *node, *next;
1148   PrinterFinder *finder;
1149
1150   finder = g_new0 (PrinterFinder, 1);
1151
1152   finder->printer_name = g_strdup (printer);
1153   finder->func = func;
1154   finder->data = data;
1155
1156   finder->backends = NULL;
1157   if (g_module_supported ())
1158     finder->backends = gtk_print_backend_load_modules ();
1159
1160   for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
1161     {
1162       next = node->next;
1163       find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
1164     }
1165
1166   if (finder->backends == NULL && !finder->found_printer)
1167     g_idle_add (find_printer_idle, finder);
1168 }
1169
1170 #define __GTK_PRINT_OPERATION_UNIX_C__
1171 #include "gtkaliasdef.c"