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 printer_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   if (priv->default_page_setup)
 418     gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd),
 419                                           priv->default_page_setup);
 420
 421   gtk_print_unix_dialog_set_current_page (GTK_PRINT_UNIX_DIALOG (pd),
 422                                           priv->current_page);
 423
 424   gtk_print_unix_dialog_set_support_selection (GTK_PRINT_UNIX_DIALOG (pd),
 425                                                priv->support_selection);
 426
 427   gtk_print_unix_dialog_set_has_selection (GTK_PRINT_UNIX_DIALOG (pd),
 428                                            priv->has_selection);
 429
 430   g_signal_emit_by_name (op, "create-custom-widget",
 431                          &priv->custom_widget);
 432
 433   if (priv->custom_widget)
 434     {
 435       custom_tab_label = priv->custom_tab_label;
 436
 437       if (custom_tab_label == NULL)
 438         {
 439           custom_tab_label = g_get_application_name ();
 440           if (custom_tab_label == NULL)
 441             custom_tab_label = _("Application");
 442         }
 443
 444       label = gtk_label_new (custom_tab_label);
 445
 446       gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
 447                                             priv->custom_widget, label);
 448
 449       g_signal_connect (pd, "notify::selected-printer", (GCallback) printer_changed_cb, op);
 450     }
 451
 452   return pd;
 453 }
 454
 455 typedef struct
 456 {
 457   GtkPrintOperation           *op;
 458   gboolean                     do_print;
 459   gboolean                     do_preview;
 460   GtkPrintOperationResult      result;
 461   GtkPrintOperationPrintFunc   print_cb;
 462   GDestroyNotify               destroy;
 463   GtkWindow                   *parent;
 464   GMainLoop                   *loop;
 465 } PrintResponseData;
 466
 467 static void
 468 print_response_data_free (gpointer data)
 469 {
 470   PrintResponseData *rdata = data;
 471
 472   g_object_unref (rdata->op);
 473   g_free (rdata);
 474 }
 475
 476 static void
 477 finish_print (PrintResponseData *rdata,
 478               GtkPrinter        *printer,
 479               GtkPageSetup      *page_setup,
 480               GtkPrintSettings  *settings)
 481 {
 482   GtkPrintOperation *op = rdata->op;
 483   GtkPrintOperationPrivate *priv = op->priv;
 484   GtkPrintJob *job;
 485
 486   if (rdata->do_print)
 487     {
 488       gtk_print_operation_set_print_settings (op, settings);
 489       priv->print_context = _gtk_print_context_new (op);
 490
 491       if ( (page_setup != NULL) && (gtk_print_operation_get_default_page_setup (op) == NULL))
 492         gtk_print_operation_set_default_page_setup (op, page_setup);
 493
 494       _gtk_print_context_set_page_setup (priv->print_context, page_setup);
 495
 496       if (!rdata->do_preview)
 497         {
 498           GtkPrintOperationUnix *op_unix;
 499           cairo_t *cr;
 500
 501           op_unix = g_new0 (GtkPrintOperationUnix, 1);
 502           priv->platform_data = op_unix;
 503           priv->free_platform_data = (GDestroyNotify) op_unix_free;
 504           op_unix->parent = rdata->parent;
 505
 506           priv->start_page = unix_start_page;
 507           priv->end_page = unix_end_page;
 508           priv->end_run = unix_end_run;
 509
 510           job = gtk_print_job_new (priv->job_name, printer, settings, page_setup);
 511           op_unix->job = job;
 512           gtk_print_job_set_track_print_status (job, priv->track_print_status);
 513
 514           op_unix->surface = gtk_print_job_get_surface (job, &priv->error);
 515           if (op_unix->surface == NULL)
 516             {
 517               rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
 518               rdata->do_print = FALSE;
 519               goto out;
 520             }
 521
 522           cr = cairo_create (op_unix->surface);
 523           gtk_print_context_set_cairo_context (priv->print_context, cr, 72, 72);
 524           cairo_destroy (cr);
 525
 526           _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
 527
 528           op_unix->job_status_changed_tag =
 529             g_signal_connect (job, "status-changed",
 530                               G_CALLBACK (job_status_changed_cb), op);
 531
 532           priv->print_pages = job->print_pages;
 533           priv->page_ranges = job->page_ranges;
 534           priv->num_page_ranges = job->num_page_ranges;
 535
 536           priv->manual_num_copies = job->num_copies;
 537           priv->manual_collation = job->collate;
 538           priv->manual_reverse = job->reverse;
 539           priv->manual_page_set = job->page_set;
 540           priv->manual_scale = job->scale;
 541           priv->manual_orientation = job->rotate_to_orientation;
 542           priv->manual_number_up = job->number_up;
 543           priv->manual_number_up_layout = job->number_up_layout;
 544         }
 545     }
 546  out:
 547   if (rdata->print_cb)
 548     rdata->print_cb (op, rdata->parent, rdata->do_print, rdata->result);
 549
 550   if (rdata->destroy)
 551     rdata->destroy (rdata);
 552 }
 553
 554 static void
 555 handle_print_response (GtkWidget *dialog,
 556                        gint       response,
 557                        gpointer   data)
 558 {
 559   GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
 560   PrintResponseData *rdata = data;
 561   GtkPrintSettings *settings = NULL;
 562   GtkPageSetup *page_setup = NULL;
 563   GtkPrinter *printer = NULL;
 564
 565   if (response == GTK_RESPONSE_OK)
 566     {
 567       printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
 568
 569       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 570       rdata->do_preview = FALSE;
 571       if (printer != NULL)
 572         rdata->do_print = TRUE;
 573     }
 574   else if (response == GTK_RESPONSE_APPLY)
 575     {
 576       /* print preview */
 577       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 578       rdata->do_preview = TRUE;
 579       rdata->do_print = TRUE;
 580
 581       rdata->op->priv->action = GTK_PRINT_OPERATION_ACTION_PREVIEW;
 582     }
 583
 584   if (rdata->do_print)
 585     {
 586       settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
 587       page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));
 588
 589       g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
 590     }
 591
 592   finish_print (rdata, printer, page_setup, settings);
 593
 594   if (settings)
 595     g_object_unref (settings);
 596
 597   gtk_widget_destroy (GTK_WIDGET (pd));
 598
 599 }
 600
 601
 602 static void
 603 found_printer (GtkPrinter        *printer,
 604                PrintResponseData *rdata)
 605 {
 606   GtkPrintOperation *op = rdata->op;
 607   GtkPrintOperationPrivate *priv = op->priv;
 608   GtkPrintSettings *settings = NULL;
 609   GtkPageSetup *page_setup = NULL;
 610
 611   if (rdata->loop)
 612     g_main_loop_quit (rdata->loop);
 613
 614   if (printer != NULL)
 615     {
 616       rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;
 617
 618       rdata->do_print = TRUE;
 619
 620       if (priv->print_settings)
 621         settings = gtk_print_settings_copy (priv->print_settings);
 622       else
 623         settings = gtk_print_settings_new ();
 624
 625       gtk_print_settings_set_printer (settings,
 626                                       gtk_printer_get_name (printer));
 627
 628       if (priv->default_page_setup)
 629         page_setup = gtk_page_setup_copy (priv->default_page_setup);
 630       else
 631         page_setup = gtk_page_setup_new ();
 632   }
 633
 634   finish_print (rdata, printer, page_setup, settings);
 635
 636   if (settings)
 637     g_object_unref (settings);
 638
 639   if (page_setup)
 640     g_object_unref (page_setup);
 641 }
 642
 643 void
 644 _gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
 645                                                         gboolean                    show_dialog,
 646                                                         GtkWindow                  *parent,
 647                                                         GtkPrintOperationPrintFunc  print_cb)
 648 {
 649   GtkWidget *pd;
 650   PrintResponseData *rdata;
 651   const gchar *printer_name;
 652
 653   rdata = g_new (PrintResponseData, 1);
 654   rdata->op = g_object_ref (op);
 655   rdata->do_print = FALSE;
 656   rdata->do_preview = FALSE;
 657   rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 658   rdata->print_cb = print_cb;
 659   rdata->parent = parent;
 660   rdata->loop = NULL;
 661   rdata->destroy = print_response_data_free;
 662
 663   if (show_dialog)
 664     {
 665       pd = get_print_dialog (op, parent);
 666       gtk_window_set_modal (GTK_WINDOW (pd), TRUE);
 667
 668       g_signal_connect (pd, "response",
 669                         G_CALLBACK (handle_print_response), rdata);
 670
 671       gtk_window_present (GTK_WINDOW (pd));
 672     }
 673   else
 674     {
 675       printer_name = NULL;
 676       if (op->priv->print_settings)
 677         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 678
 679       find_printer (printer_name, (GFunc) found_printer, rdata);
 680     }
 681 }
 682
 683 static cairo_status_t
 684 write_preview (void                *closure,
 685                const unsigned char *data,
 686                unsigned int         length)
 687 {
 688   gint fd = GPOINTER_TO_INT (closure);
 689   gssize written;
 690
 691   while (length > 0)
 692     {
 693       written = write (fd, data, length);
 694
 695       if (written == -1)
 696         {
 697           if (errno == EAGAIN || errno == EINTR)
 698             continue;
 699
 700           return CAIRO_STATUS_WRITE_ERROR;
 701         }
 702
 703       data += written;
 704       length -= written;
 705     }
 706
 707   return CAIRO_STATUS_SUCCESS;
 708 }
 709
 710 static void
 711 close_preview (void *data)
 712 {
 713   gint fd = GPOINTER_TO_INT (data);
 714
 715   close (fd);
 716 }
 717
 718 cairo_surface_t *
 719 _gtk_print_operation_platform_backend_create_preview_surface (GtkPrintOperation *op,
 720                                                               GtkPageSetup      *page_setup,
 721                                                               gdouble           *dpi_x,
 722                                                               gdouble           *dpi_y,
 723                                                               gchar            **target)
 724 {
 725   gchar *filename;
 726   gint fd;
 727   GtkPaperSize *paper_size;
 728   gdouble w, h;
 729   cairo_surface_t *surface;
 730   static cairo_user_data_key_t key;
 731
 732   filename = g_build_filename (g_get_tmp_dir (), "previewXXXXXX.pdf", NULL);
 733   fd = g_mkstemp (filename);
 734
 735   if (fd < 0)
 736     {
 737       g_free (filename);
 738       return NULL;
 739     }
 740
 741   *target = filename;
 742
 743   paper_size = gtk_page_setup_get_paper_size (page_setup);
 744   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
 745   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
 746
 747   *dpi_x = *dpi_y = 72;
 748   surface = cairo_pdf_surface_create_for_stream (write_preview, GINT_TO_POINTER (fd), w, h);
 749
 750   cairo_surface_set_user_data (surface, &key, GINT_TO_POINTER (fd), close_preview);
 751
 752   return surface;
 753 }
 754
 755 void
 756 _gtk_print_operation_platform_backend_preview_start_page (GtkPrintOperation *op,
 757                                                           cairo_surface_t   *surface,
 758                                                           cairo_t           *cr)
 759 {
 760 }
 761
 762 void
 763 _gtk_print_operation_platform_backend_preview_end_page (GtkPrintOperation *op,
 764                                                         cairo_surface_t   *surface,
 765                                                         cairo_t           *cr)
 766 {
 767   cairo_show_page (cr);
 768 }
 769
 770 void
 771 _gtk_print_operation_platform_backend_resize_preview_surface (GtkPrintOperation *op,
 772                                                               GtkPageSetup      *page_setup,
 773                                                               cairo_surface_t   *surface)
 774 {
 775   GtkPaperSize *paper_size;
 776   gdouble w, h;
 777
 778   paper_size = gtk_page_setup_get_paper_size (page_setup);
 779   w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
 780   h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
 781   cairo_pdf_surface_set_size (surface, w, h);
 782 }
 783
 784
 785 GtkPrintOperationResult
 786 _gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
 787                                                   gboolean           show_dialog,
 788                                                   GtkWindow         *parent,
 789                                                   gboolean          *do_print)
 790  {
 791   GtkWidget *pd;
 792   PrintResponseData rdata;
 793   gint response;
 794   const gchar *printer_name;
 795
 796   rdata.op = op;
 797   rdata.do_print = FALSE;
 798   rdata.do_preview = FALSE;
 799   rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
 800   rdata.print_cb = NULL;
 801   rdata.destroy = NULL;
 802   rdata.parent = parent;
 803   rdata.loop = NULL;
 804
 805   if (show_dialog)
 806     {
 807       pd = get_print_dialog (op, parent);
 808
 809       response = gtk_dialog_run (GTK_DIALOG (pd));
 810       handle_print_response (pd, response, &rdata);
 811     }
 812   else
 813     {
 814       printer_name = NULL;
 815       if (op->priv->print_settings)
 816         printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
 817
 818       rdata.loop = g_main_loop_new (NULL, FALSE);
 819       find_printer (printer_name,
 820                     (GFunc) found_printer, &rdata);
 821
 822       GDK_THREADS_LEAVE ();
 823       g_main_loop_run (rdata.loop);
 824       GDK_THREADS_ENTER ();
 825
 826       g_main_loop_unref (rdata.loop);
 827       rdata.loop = NULL;
 828     }
 829
 830   *do_print = rdata.do_print;
 831
 832   return rdata.result;
 833 }
 834
 835
 836 typedef struct
 837 {
 838   GtkPageSetup         *page_setup;
 839   GtkPageSetupDoneFunc  done_cb;
 840   gpointer              data;
 841   GDestroyNotify        destroy;
 842 } PageSetupResponseData;
 843
 844 static void
 845 page_setup_data_free (gpointer data)
 846 {
 847   PageSetupResponseData *rdata = data;
 848
 849   if (rdata->page_setup)
 850     g_object_unref (rdata->page_setup);
 851
 852   g_free (rdata);
 853 }
 854
 855 static void
 856 handle_page_setup_response (GtkWidget *dialog,
 857                             gint       response,
 858                             gpointer   data)
 859 {
 860   GtkPageSetupUnixDialog *psd;
 861   PageSetupResponseData *rdata = data;
 862
 863   psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
 864   if (response == GTK_RESPONSE_OK)
 865     rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);
 866
 867   gtk_widget_destroy (dialog);
 868
 869   if (rdata->done_cb)
 870     rdata->done_cb (rdata->page_setup, rdata->data);
 871
 872   if (rdata->destroy)
 873     rdata->destroy (rdata);
 874 }
 875
 876 static GtkWidget *
 877 get_page_setup_dialog (GtkWindow        *parent,
 878                        GtkPageSetup     *page_setup,
 879                        GtkPrintSettings *settings)
 880 {
 881   GtkWidget *dialog;
 882
 883   dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
 884   if (page_setup)
 885     gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 886                                                page_setup);
 887   gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
 888                                                  settings);
 889
 890   return dialog;
 891 }
 892
 893 /**
 894  * gtk_print_run_page_setup_dialog:
 895  * @parent: transient parent, or %NULL
 896  * @page_setup: an existing #GtkPageSetup, or %NULL
 897  * @settings: a #GtkPrintSettings
 898  *
 899  * Runs a page setup dialog, letting the user modify the values from
 900  * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup
 901  * is identical to the passed in @page_setup, otherwise it contains the
 902  * modifications done in the dialog.
 903  *
 904  * Note that this function may use a recursive mainloop to show the page
 905  * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is
 906  * a problem.
 907  *
 908  * Return value: a new #GtkPageSetup
 909  *
 910  * Since: 2.10
 911  */
 912 GtkPageSetup *
 913 gtk_print_run_page_setup_dialog (GtkWindow        *parent,
 914                                  GtkPageSetup     *page_setup,
 915                                  GtkPrintSettings *settings)
 916 {
 917   GtkWidget *dialog;
 918   gint response;
 919   PageSetupResponseData rdata;
 920
 921   rdata.page_setup = NULL;
 922   rdata.done_cb = NULL;
 923   rdata.data = NULL;
 924   rdata.destroy = NULL;
 925
 926   dialog = get_page_setup_dialog (parent, page_setup, settings);
 927   response = gtk_dialog_run (GTK_DIALOG (dialog));
 928   handle_page_setup_response (dialog, response, &rdata);
 929
 930   if (rdata.page_setup)
 931     return rdata.page_setup;
 932   else if (page_setup)
 933     return gtk_page_setup_copy (page_setup);
 934   else
 935     return gtk_page_setup_new ();
 936 }
 937
 938 /**
 939  * gtk_print_run_page_setup_dialog_async:
 940  * @parent: transient parent, or %NULL
 941  * @page_setup: an existing #GtkPageSetup, or %NULL
 942  * @settings: a #GtkPrintSettings
 943  * @done_cb: a function to call when the user saves the modified page setup
 944  * @data: user data to pass to @done_cb
 945  *
 946  * Runs a page setup dialog, letting the user modify the values from @page_setup.
 947  *
 948  * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after
 949  * showing the page setup dialog on platforms that support this, and calls @done_cb
 950  * from a signal handler for the ::response signal of the dialog.
 951  *
 952  * Since: 2.10
 953  */
 954 void
 955 gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
 956                                        GtkPageSetup         *page_setup,
 957                                        GtkPrintSettings     *settings,
 958                                        GtkPageSetupDoneFunc  done_cb,
 959                                        gpointer              data)
 960 {
 961   GtkWidget *dialog;
 962   PageSetupResponseData *rdata;
 963
 964   dialog = get_page_setup_dialog (parent, page_setup, settings);
 965   gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
 966
 967   rdata = g_new (PageSetupResponseData, 1);
 968   rdata->page_setup = NULL;
 969   rdata->done_cb = done_cb;
 970   rdata->data = data;
 971   rdata->destroy = page_setup_data_free;
 972
 973   g_signal_connect (dialog, "response",
 974                     G_CALLBACK (handle_page_setup_response), rdata);
 975
 976   gtk_window_present (GTK_WINDOW (dialog));
 977  }
 978
 979 struct _PrinterFinder
 980 {
 981   gboolean found_printer;
 982   GFunc func;
 983   gpointer data;
 984   gchar *printer_name;
 985   GList *backends;
 986   guint timeout_tag;
 987   GtkPrinter *printer;
 988   GtkPrinter *default_printer;
 989   GtkPrinter *first_printer;
 990 };
 991
 992 static gboolean
 993 find_printer_idle (gpointer data)
 994 {
 995   PrinterFinder *finder = data;
 996   GtkPrinter *printer;
 997
 998   if (finder->printer != NULL)
 999     printer = finder->printer;
1000   else if (finder->default_printer != NULL)
1001     printer = finder->default_printer;
1002   else if (finder->first_printer != NULL)
1003     printer = finder->first_printer;
1004   else
1005     printer = NULL;
1006
1007   finder->func (printer, finder->data);
1008
1009   printer_finder_free (finder);
1010
1011   return FALSE;
1012 }
1013
1014 static void
1015 printer_added_cb (GtkPrintBackend *backend,
1016                   GtkPrinter      *printer,
1017                   PrinterFinder   *finder)
1018 {
1019   if (finder->found_printer)
1020     return;
1021
1022   /* FIXME this skips "Print to PDF" - is this intentional ? */
1023   if (gtk_printer_is_virtual (printer))
1024     return;
1025
1026   if (finder->printer_name != NULL &&
1027       strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
1028     {
1029       finder->printer = g_object_ref (printer);
1030       finder->found_printer = TRUE;
1031     }
1032   else if (finder->default_printer == NULL &&
1033            gtk_printer_is_default (printer))
1034     {
1035       finder->default_printer = g_object_ref (printer);
1036       if (finder->printer_name == NULL)
1037         finder->found_printer = TRUE;
1038     }
1039   else
1040     if (finder->first_printer == NULL)
1041       finder->first_printer = g_object_ref (printer);
1042
1043   if (finder->found_printer)
1044     g_idle_add (find_printer_idle, finder);
1045 }
1046
1047 static void
1048 printer_list_done_cb (GtkPrintBackend *backend,
1049                       PrinterFinder   *finder)
1050 {
1051   finder->backends = g_list_remove (finder->backends, backend);
1052
1053   g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
1054   g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
1055
1056   gtk_print_backend_destroy (backend);
1057   g_object_unref (backend);
1058
1059   if (finder->backends == NULL && !finder->found_printer)
1060     g_idle_add (find_printer_idle, finder);
1061 }
1062
1063 static void
1064 find_printer_init (PrinterFinder   *finder,
1065                    GtkPrintBackend *backend)
1066 {
1067   GList *list;
1068   GList *node;
1069
1070   list = gtk_print_backend_get_printer_list (backend);
1071
1072   node = list;
1073   while (node != NULL)
1074     {
1075       printer_added_cb (backend, node->data, finder);
1076       node = node->next;
1077
1078       if (finder->found_printer)
1079         break;
1080     }
1081
1082   g_list_free (list);
1083
1084   if (gtk_print_backend_printer_list_is_done (backend))
1085     {
1086       finder->backends = g_list_remove (finder->backends, backend);
1087       gtk_print_backend_destroy (backend);
1088       g_object_unref (backend);
1089     }
1090   else
1091     {
1092       g_signal_connect (backend, "printer-added",
1093                         (GCallback) printer_added_cb,
1094                         finder);
1095       g_signal_connect (backend, "printer-list-done",
1096                         (GCallback) printer_list_done_cb,
1097                         finder);
1098     }
1099
1100 }
1101
1102 static void
1103 printer_finder_free (PrinterFinder *finder)
1104 {
1105   GList *l;
1106
1107   g_free (finder->printer_name);
1108
1109   if (finder->printer)
1110     g_object_unref (finder->printer);
1111
1112   if (finder->default_printer)
1113     g_object_unref (finder->default_printer);
1114
1115   if (finder->first_printer)
1116     g_object_unref (finder->first_printer);
1117
1118   for (l = finder->backends; l != NULL; l = l->next)
1119     {
1120       GtkPrintBackend *backend = l->data;
1121       g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
1122       g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
1123       gtk_print_backend_destroy (backend);
1124       g_object_unref (backend);
1125     }
1126
1127   g_list_free (finder->backends);
1128
1129   g_free (finder);
1130 }
1131
1132 static void
1133 find_printer (const gchar *printer,
1134               GFunc        func,
1135               gpointer     data)
1136 {
1137   GList *node, *next;
1138   PrinterFinder *finder;
1139
1140   finder = g_new0 (PrinterFinder, 1);
1141
1142   finder->printer_name = g_strdup (printer);
1143   finder->func = func;
1144   finder->data = data;
1145
1146   finder->backends = NULL;
1147   if (g_module_supported ())
1148     finder->backends = gtk_print_backend_load_modules ();
1149
1150   for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
1151     {
1152       next = node->next;
1153       find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
1154     }
1155
1156   if (finder->backends == NULL && !finder->found_printer)
1157     g_idle_add (find_printer_idle, finder);
1158 }
1159
1160 #define __GTK_PRINT_OPERATION_UNIX_C__
1161 #include "gtkaliasdef.c"