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