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