Pileus Git - ~andy/gtk/blob - gtk/gtkprintbackend.c

   1 /* GTK - The GIMP Toolkit
   2  * gtkprintbackend.h: Abstract printer backend interfaces
   3  * Copyright (C) 2003, Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22 #include <string.h>
  23
  24 #include <gmodule.h>
  25
  26 #include "gtkintl.h"
  27 #include "gtkmodules.h"
  28 #include "gtkmarshalers.h"
  29 #include "gtkprivate.h"
  30 #include "gtkprintbackend.h"
  31 #include "gtkprinter-private.h"
  32 #include "gtkalias.h"
  33
  34 #define GTK_PRINT_BACKEND_GET_PRIVATE(o)  \
  35    (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_PRINT_BACKEND, GtkPrintBackendPrivate))
  36
  37 static void gtk_print_backend_dispose      (GObject      *object);
  38 static void gtk_print_backend_set_property (GObject      *object,
  39                                             guint         prop_id,
  40                                             const GValue *value,
  41                                             GParamSpec   *pspec);
  42 static void gtk_print_backend_get_property (GObject      *object,
  43                                             guint         prop_id,
  44                                             GValue       *value,
  45                                             GParamSpec   *pspec);
  46
  47 struct _GtkPrintBackendPrivate
  48 {
  49   GHashTable *printers;
  50   guint printer_list_requested : 1;
  51   guint printer_list_done : 1;
  52   GtkPrintBackendStatus status;
  53   char **auth_info_required;
  54   char **auth_info;
  55 };
  56
  57 enum {
  58   PRINTER_LIST_CHANGED,
  59   PRINTER_LIST_DONE,
  60   PRINTER_ADDED,
  61   PRINTER_REMOVED,
  62   PRINTER_STATUS_CHANGED,
  63   REQUEST_PASSWORD,
  64   LAST_SIGNAL
  65 };
  66
  67 static guint signals[LAST_SIGNAL] = { 0 };
  68
  69 enum
  70 {
  71   PROP_ZERO,
  72   PROP_STATUS
  73 };
  74
  75 static GObjectClass *backend_parent_class;
  76
  77 GQuark
  78 gtk_print_backend_error_quark (void)
  79 {
  80   static GQuark quark = 0;
  81   if (quark == 0)
  82     quark = g_quark_from_static_string ("gtk-print-backend-error-quark");
  83   return quark;
  84 }
  85
  86 /*****************************************
  87  *     GtkPrintBackendModule modules     *
  88  *****************************************/
  89
  90 typedef struct _GtkPrintBackendModule GtkPrintBackendModule;
  91 typedef struct _GtkPrintBackendModuleClass GtkPrintBackendModuleClass;
  92
  93 struct _GtkPrintBackendModule
  94 {
  95   GTypeModule parent_instance;
  96
  97   GModule *library;
  98
  99   void             (*init)     (GTypeModule    *module);
 100   void             (*exit)     (void);
 101   GtkPrintBackend* (*create)   (void);
 102
 103   gchar *path;
 104 };
 105
 106 struct _GtkPrintBackendModuleClass
 107 {
 108   GTypeModuleClass parent_class;
 109 };
 110
 111 G_DEFINE_TYPE (GtkPrintBackendModule, _gtk_print_backend_module, G_TYPE_TYPE_MODULE)
 112 #define GTK_TYPE_PRINT_BACKEND_MODULE      (_gtk_print_backend_module_get_type ())
 113 #define GTK_PRINT_BACKEND_MODULE(module)   (G_TYPE_CHECK_INSTANCE_CAST ((module), GTK_TYPE_PRINT_BACKEND_MODULE, GtkPrintBackendModule))
 114
 115 static GSList *loaded_backends;
 116
 117 static gboolean
 118 gtk_print_backend_module_load (GTypeModule *module)
 119 {
 120   GtkPrintBackendModule *pb_module = GTK_PRINT_BACKEND_MODULE (module);
 121   gpointer initp, exitp, createp;
 122
 123   pb_module->library = g_module_open (pb_module->path, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
 124   if (!pb_module->library)
 125     {
 126       g_warning ("%s", g_module_error());
 127       return FALSE;
 128     }
 129
 130   /* extract symbols from the lib */
 131   if (!g_module_symbol (pb_module->library, "pb_module_init",
 132                         &initp) ||
 133       !g_module_symbol (pb_module->library, "pb_module_exit",
 134                         &exitp) ||
 135       !g_module_symbol (pb_module->library, "pb_module_create",
 136                         &createp))
 137     {
 138       g_warning ("%s", g_module_error());
 139       g_module_close (pb_module->library);
 140
 141       return FALSE;
 142     }
 143
 144   pb_module->init = initp;
 145   pb_module->exit = exitp;
 146   pb_module->create = createp;
 147
 148   /* call the printbackend's init function to let it */
 149   /* setup anything it needs to set up. */
 150   pb_module->init (module);
 151
 152   return TRUE;
 153 }
 154
 155 static void
 156 gtk_print_backend_module_unload (GTypeModule *module)
 157 {
 158   GtkPrintBackendModule *pb_module = GTK_PRINT_BACKEND_MODULE (module);
 159
 160   pb_module->exit();
 161
 162   g_module_close (pb_module->library);
 163   pb_module->library = NULL;
 164
 165   pb_module->init = NULL;
 166   pb_module->exit = NULL;
 167   pb_module->create = NULL;
 168 }
 169
 170 /* This only will ever be called if an error occurs during
 171  * initialization
 172  */
 173 static void
 174 gtk_print_backend_module_finalize (GObject *object)
 175 {
 176   GtkPrintBackendModule *module = GTK_PRINT_BACKEND_MODULE (object);
 177
 178   g_free (module->path);
 179
 180   G_OBJECT_CLASS (_gtk_print_backend_module_parent_class)->finalize (object);
 181 }
 182
 183 static void
 184 _gtk_print_backend_module_class_init (GtkPrintBackendModuleClass *class)
 185 {
 186   GTypeModuleClass *module_class = G_TYPE_MODULE_CLASS (class);
 187   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 188
 189   module_class->load = gtk_print_backend_module_load;
 190   module_class->unload = gtk_print_backend_module_unload;
 191
 192   gobject_class->finalize = gtk_print_backend_module_finalize;
 193 }
 194
 195 static void
 196 gtk_print_backend_set_property (GObject      *object,
 197                                 guint         prop_id,
 198                                 const GValue *value,
 199                                 GParamSpec   *pspec)
 200 {
 201   GtkPrintBackend *backend = GTK_PRINT_BACKEND (object);
 202   GtkPrintBackendPrivate *priv;
 203
 204   priv = backend->priv = GTK_PRINT_BACKEND_GET_PRIVATE (backend);
 205
 206   switch (prop_id)
 207     {
 208     case PROP_STATUS:
 209       priv->status = g_value_get_int (value);
 210       break;
 211     default:
 212       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 213       break;
 214     }
 215 }
 216
 217 static void
 218 gtk_print_backend_get_property (GObject    *object,
 219                                 guint       prop_id,
 220                                 GValue     *value,
 221                                 GParamSpec *pspec)
 222 {
 223   GtkPrintBackend *backend = GTK_PRINT_BACKEND (object);
 224   GtkPrintBackendPrivate *priv;
 225
 226   priv = backend->priv = GTK_PRINT_BACKEND_GET_PRIVATE (backend);
 227
 228   switch (prop_id)
 229     {
 230     case PROP_STATUS:
 231       g_value_set_int (value, priv->status);
 232       break;
 233     default:
 234       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 235       break;
 236     }
 237 }
 238
 239 static void
 240 _gtk_print_backend_module_init (GtkPrintBackendModule *pb_module)
 241 {
 242 }
 243
 244 static GtkPrintBackend *
 245 _gtk_print_backend_module_create (GtkPrintBackendModule *pb_module)
 246 {
 247   GtkPrintBackend *pb;
 248
 249   if (g_type_module_use (G_TYPE_MODULE (pb_module)))
 250     {
 251       pb = pb_module->create ();
 252       g_type_module_unuse (G_TYPE_MODULE (pb_module));
 253       return pb;
 254     }
 255   return NULL;
 256 }
 257
 258 static GtkPrintBackend *
 259 _gtk_print_backend_create (const gchar *backend_name)
 260 {
 261   GSList *l;
 262   gchar *module_path;
 263   gchar *full_name;
 264   GtkPrintBackendModule *pb_module;
 265   GtkPrintBackend *pb;
 266
 267   for (l = loaded_backends; l != NULL; l = l->next)
 268     {
 269       pb_module = l->data;
 270
 271       if (strcmp (G_TYPE_MODULE (pb_module)->name, backend_name) == 0)
 272         return _gtk_print_backend_module_create (pb_module);
 273     }
 274
 275   pb = NULL;
 276   if (g_module_supported ())
 277     {
 278       full_name = g_strconcat ("printbackend-", backend_name, NULL);
 279       module_path = _gtk_find_module (full_name, "printbackends");
 280       g_free (full_name);
 281
 282       if (module_path)
 283         {
 284           pb_module = g_object_new (GTK_TYPE_PRINT_BACKEND_MODULE, NULL);
 285
 286           g_type_module_set_name (G_TYPE_MODULE (pb_module), backend_name);
 287           pb_module->path = g_strdup (module_path);
 288
 289           loaded_backends = g_slist_prepend (loaded_backends,
 290                                              pb_module);
 291
 292           pb = _gtk_print_backend_module_create (pb_module);
 293
 294           /* Increase use-count so that we don't unload print backends.
 295            * There is a problem with module unloading in the cups module,
 296            * see cups_dispatch_watch_finalize for details.
 297            */
 298           g_type_module_use (G_TYPE_MODULE (pb_module));
 299         }
 300
 301       g_free (module_path);
 302     }
 303
 304   return pb;
 305 }
 306
 307 /**
 308  * gtk_printer_backend_load_modules:
 309  *
 310  * Return value: (element-type GtkPrintBackend) (transfer container):
 311  */
 312 GList *
 313 gtk_print_backend_load_modules (void)
 314 {
 315   GList *result;
 316   GtkPrintBackend *backend;
 317   gchar *setting;
 318   gchar **backends;
 319   gint i;
 320   GtkSettings *settings;
 321
 322   result = NULL;
 323
 324   settings = gtk_settings_get_default ();
 325   if (settings)
 326     g_object_get (settings, "gtk-print-backends", &setting, NULL);
 327   else
 328     setting = g_strdup (GTK_PRINT_BACKENDS);
 329
 330   backends = g_strsplit (setting, ",", -1);
 331
 332   for (i = 0; backends[i]; i++)
 333     {
 334       g_strchug (backends[i]);
 335       g_strchomp (backends[i]);
 336       backend = _gtk_print_backend_create (backends[i]);
 337
 338       if (backend)
 339         result = g_list_append (result, backend);
 340     }
 341
 342   g_strfreev (backends);
 343   g_free (setting);
 344
 345   return result;
 346 }
 347
 348 /*****************************************
 349  *             GtkPrintBackend           *
 350  *****************************************/
 351
 352 G_DEFINE_TYPE (GtkPrintBackend, gtk_print_backend, G_TYPE_OBJECT)
 353
 354 static void                 fallback_printer_request_details       (GtkPrinter          *printer);
 355 static gboolean             fallback_printer_mark_conflicts        (GtkPrinter          *printer,
 356                                                                     GtkPrinterOptionSet *options);
 357 static gboolean             fallback_printer_get_hard_margins      (GtkPrinter          *printer,
 358                                                                     gdouble             *top,
 359                                                                     gdouble             *bottom,
 360                                                                     gdouble             *left,
 361                                                                     gdouble             *right);
 362 static GList *              fallback_printer_list_papers           (GtkPrinter          *printer);
 363 static GtkPageSetup *       fallback_printer_get_default_page_size (GtkPrinter          *printer);
 364 static GtkPrintCapabilities fallback_printer_get_capabilities      (GtkPrinter          *printer);
 365 static void                 request_password                       (GtkPrintBackend     *backend,
 366                                                                     gpointer             auth_info_required,
 367                                                                     gpointer             auth_info_default,
 368                                                                     gpointer             auth_info_display,
 369                                                                     gpointer             auth_info_visible,
 370                                                                     const gchar         *prompt);
 371
 372 static void
 373 gtk_print_backend_class_init (GtkPrintBackendClass *class)
 374 {
 375   GObjectClass *object_class;
 376   object_class = (GObjectClass *) class;
 377
 378   backend_parent_class = g_type_class_peek_parent (class);
 379
 380   object_class->dispose = gtk_print_backend_dispose;
 381   object_class->set_property = gtk_print_backend_set_property;
 382   object_class->get_property = gtk_print_backend_get_property;
 383
 384   class->printer_request_details = fallback_printer_request_details;
 385   class->printer_mark_conflicts = fallback_printer_mark_conflicts;
 386   class->printer_get_hard_margins = fallback_printer_get_hard_margins;
 387   class->printer_list_papers = fallback_printer_list_papers;
 388   class->printer_get_default_page_size = fallback_printer_get_default_page_size;
 389   class->printer_get_capabilities = fallback_printer_get_capabilities;
 390   class->request_password = request_password;
 391
 392   g_object_class_install_property (object_class,
 393                                    PROP_STATUS,
 394                                    g_param_spec_int ("status",
 395                                                      "Status",
 396                                                      "The status of the print backend",
 397                                                      GTK_PRINT_BACKEND_STATUS_UNKNOWN,
 398                                                      GTK_PRINT_BACKEND_STATUS_UNAVAILABLE,
 399                                                      GTK_PRINT_BACKEND_STATUS_UNKNOWN,
 400                                                      GTK_PARAM_READWRITE));
 401
 402   g_type_class_add_private (class, sizeof (GtkPrintBackendPrivate));
 403
 404   signals[PRINTER_LIST_CHANGED] =
 405     g_signal_new (I_("printer-list-changed"),
 406                   G_TYPE_FROM_CLASS (class),
 407                   G_SIGNAL_RUN_LAST,
 408                   G_STRUCT_OFFSET (GtkPrintBackendClass, printer_list_changed),
 409                   NULL, NULL,
 410                   g_cclosure_marshal_VOID__VOID,
 411                   G_TYPE_NONE, 0);
 412   signals[PRINTER_LIST_DONE] =
 413     g_signal_new (I_("printer-list-done"),
 414                     G_TYPE_FROM_CLASS (class),
 415                     G_SIGNAL_RUN_LAST,
 416                     G_STRUCT_OFFSET (GtkPrintBackendClass, printer_list_done),
 417                     NULL, NULL,
 418                     g_cclosure_marshal_VOID__VOID,
 419                     G_TYPE_NONE, 0);
 420   signals[PRINTER_ADDED] =
 421     g_signal_new (I_("printer-added"),
 422                   G_TYPE_FROM_CLASS (class),
 423                   G_SIGNAL_RUN_LAST,
 424                   G_STRUCT_OFFSET (GtkPrintBackendClass, printer_added),
 425                   NULL, NULL,
 426                   g_cclosure_marshal_VOID__OBJECT,
 427                   G_TYPE_NONE, 1, GTK_TYPE_PRINTER);
 428   signals[PRINTER_REMOVED] =
 429     g_signal_new (I_("printer-removed"),
 430                   G_TYPE_FROM_CLASS (class),
 431                   G_SIGNAL_RUN_LAST,
 432                   G_STRUCT_OFFSET (GtkPrintBackendClass, printer_removed),
 433                   NULL, NULL,
 434                   g_cclosure_marshal_VOID__OBJECT,
 435                   G_TYPE_NONE, 1, GTK_TYPE_PRINTER);
 436   signals[PRINTER_STATUS_CHANGED] =
 437     g_signal_new (I_("printer-status-changed"),
 438                   G_TYPE_FROM_CLASS (class),
 439                   G_SIGNAL_RUN_LAST,
 440                   G_STRUCT_OFFSET (GtkPrintBackendClass, printer_status_changed),
 441                   NULL, NULL,
 442                   g_cclosure_marshal_VOID__OBJECT,
 443                   G_TYPE_NONE, 1, GTK_TYPE_PRINTER);
 444   signals[REQUEST_PASSWORD] =
 445     g_signal_new (I_("request-password"),
 446                   G_TYPE_FROM_CLASS (class),
 447                   G_SIGNAL_RUN_LAST,
 448                   G_STRUCT_OFFSET (GtkPrintBackendClass, request_password),
 449                   NULL, NULL,
 450                   _gtk_marshal_VOID__POINTER_POINTER_POINTER_POINTER_STRING,
 451                   G_TYPE_NONE, 5, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_STRING);
 452 }
 453
 454 static void
 455 gtk_print_backend_init (GtkPrintBackend *backend)
 456 {
 457   GtkPrintBackendPrivate *priv;
 458
 459   priv = backend->priv = GTK_PRINT_BACKEND_GET_PRIVATE (backend);
 460
 461   priv->printers = g_hash_table_new_full (g_str_hash, g_str_equal,
 462                                           (GDestroyNotify) g_free,
 463                                           (GDestroyNotify) g_object_unref);
 464   priv->auth_info_required = NULL;
 465   priv->auth_info = NULL;
 466 }
 467
 468 static void
 469 gtk_print_backend_dispose (GObject *object)
 470 {
 471   GtkPrintBackend *backend;
 472   GtkPrintBackendPrivate *priv;
 473
 474   backend = GTK_PRINT_BACKEND (object);
 475   priv = backend->priv;
 476
 477   /* We unref the printers in dispose, not in finalize so that
 478    * we can break refcount cycles with gtk_print_backend_destroy
 479    */
 480   if (priv->printers)
 481     {
 482       g_hash_table_destroy (priv->printers);
 483       priv->printers = NULL;
 484     }
 485
 486   backend_parent_class->dispose (object);
 487 }
 488
 489
 490 static void
 491 fallback_printer_request_details (GtkPrinter *printer)
 492 {
 493 }
 494
 495 static gboolean
 496 fallback_printer_mark_conflicts (GtkPrinter          *printer,
 497                                  GtkPrinterOptionSet *options)
 498 {
 499   return FALSE;
 500 }
 501
 502 static gboolean
 503 fallback_printer_get_hard_margins (GtkPrinter *printer,
 504                                    gdouble    *top,
 505                                    gdouble    *bottom,
 506                                    gdouble    *left,
 507                                    gdouble    *right)
 508 {
 509   return FALSE;
 510 }
 511
 512 static GList *
 513 fallback_printer_list_papers (GtkPrinter *printer)
 514 {
 515   return NULL;
 516 }
 517
 518 static GtkPageSetup *
 519 fallback_printer_get_default_page_size (GtkPrinter *printer)
 520 {
 521   return NULL;
 522 }
 523
 524 static GtkPrintCapabilities
 525 fallback_printer_get_capabilities (GtkPrinter *printer)
 526 {
 527   return 0;
 528 }
 529
 530
 531 static void
 532 printer_hash_to_sorted_active_list (const gchar  *key,
 533                                     gpointer      value,
 534                                     GList       **out_list)
 535 {
 536   GtkPrinter *printer;
 537
 538   printer = GTK_PRINTER (value);
 539
 540   if (gtk_printer_get_name (printer) == NULL)
 541     return;
 542
 543   if (!gtk_printer_is_active (printer))
 544     return;
 545
 546   *out_list = g_list_insert_sorted (*out_list, value, (GCompareFunc) gtk_printer_compare);
 547 }
 548
 549
 550 void
 551 gtk_print_backend_add_printer (GtkPrintBackend *backend,
 552                                GtkPrinter      *printer)
 553 {
 554   GtkPrintBackendPrivate *priv;
 555
 556   g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
 557
 558   priv = backend->priv;
 559
 560   if (!priv->printers)
 561     return;
 562
 563   g_hash_table_insert (priv->printers,
 564                        g_strdup (gtk_printer_get_name (printer)),
 565                        g_object_ref (printer));
 566 }
 567
 568 void
 569 gtk_print_backend_remove_printer (GtkPrintBackend *backend,
 570                                   GtkPrinter      *printer)
 571 {
 572   GtkPrintBackendPrivate *priv;
 573
 574   g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
 575   priv = backend->priv;
 576
 577   if (!priv->printers)
 578     return;
 579
 580   g_hash_table_remove (priv->printers,
 581                        gtk_printer_get_name (printer));
 582 }
 583
 584 void
 585 gtk_print_backend_set_list_done (GtkPrintBackend *backend)
 586 {
 587   if (!backend->priv->printer_list_done)
 588     {
 589       backend->priv->printer_list_done = TRUE;
 590       g_signal_emit (backend, signals[PRINTER_LIST_DONE], 0);
 591     }
 592 }
 593
 594
 595 /**
 596  * gtk_print_backend_get_printer_list:
 597  *
 598  * Return value: (element-type GtkPrinter) (transfer container):
 599  */
 600 GList *
 601 gtk_print_backend_get_printer_list (GtkPrintBackend *backend)
 602 {
 603   GtkPrintBackendPrivate *priv;
 604   GList *result;
 605
 606   g_return_val_if_fail (GTK_IS_PRINT_BACKEND (backend), NULL);
 607
 608   priv = backend->priv;
 609
 610   result = NULL;
 611   if (priv->printers != NULL)
 612     g_hash_table_foreach (priv->printers,
 613                           (GHFunc) printer_hash_to_sorted_active_list,
 614                           &result);
 615
 616   if (!priv->printer_list_requested && priv->printers != NULL)
 617     {
 618       if (GTK_PRINT_BACKEND_GET_CLASS (backend)->request_printer_list)
 619         GTK_PRINT_BACKEND_GET_CLASS (backend)->request_printer_list (backend);
 620       priv->printer_list_requested = TRUE;
 621     }
 622
 623   return result;
 624 }
 625
 626 gboolean
 627 gtk_print_backend_printer_list_is_done (GtkPrintBackend *print_backend)
 628 {
 629   g_return_val_if_fail (GTK_IS_PRINT_BACKEND (print_backend), TRUE);
 630
 631   return print_backend->priv->printer_list_done;
 632 }
 633
 634 GtkPrinter *
 635 gtk_print_backend_find_printer (GtkPrintBackend *backend,
 636                                 const gchar     *printer_name)
 637 {
 638   GtkPrintBackendPrivate *priv;
 639   GtkPrinter *printer;
 640
 641   g_return_val_if_fail (GTK_IS_PRINT_BACKEND (backend), NULL);
 642
 643   priv = backend->priv;
 644
 645   if (priv->printers)
 646     printer = g_hash_table_lookup (priv->printers, printer_name);
 647   else
 648     printer = NULL;
 649
 650   return printer;
 651 }
 652
 653 void
 654 gtk_print_backend_print_stream (GtkPrintBackend        *backend,
 655                                 GtkPrintJob            *job,
 656                                 GIOChannel             *data_io,
 657                                 GtkPrintJobCompleteFunc callback,
 658                                 gpointer                user_data,
 659                                 GDestroyNotify          dnotify)
 660 {
 661   g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
 662
 663   GTK_PRINT_BACKEND_GET_CLASS (backend)->print_stream (backend,
 664                                                        job,
 665                                                        data_io,
 666                                                        callback,
 667                                                        user_data,
 668                                                        dnotify);
 669 }
 670
 671 void
 672 gtk_print_backend_set_password (GtkPrintBackend  *backend,
 673                                 gchar           **auth_info_required,
 674                                 gchar           **auth_info)
 675 {
 676   g_return_if_fail (GTK_IS_PRINT_BACKEND (backend));
 677
 678   if (GTK_PRINT_BACKEND_GET_CLASS (backend)->set_password)
 679     GTK_PRINT_BACKEND_GET_CLASS (backend)->set_password (backend, auth_info_required, auth_info);
 680 }
 681
 682 static void
 683 store_entry (GtkEntry  *entry,
 684              gpointer   user_data)
 685 {
 686   gchar **data = (gchar **) user_data;
 687
 688   if (*data != NULL)
 689     {
 690       memset (*data, 0, strlen (*data));
 691       g_free (*data);
 692     }
 693
 694   *data = g_strdup (gtk_entry_get_text (entry));
 695 }
 696
 697 static void
 698 password_dialog_response (GtkWidget       *dialog,
 699                           gint             response_id,
 700                           GtkPrintBackend *backend)
 701 {
 702   GtkPrintBackendPrivate *priv = backend->priv;
 703   gint i;
 704
 705   if (response_id == GTK_RESPONSE_OK)
 706     gtk_print_backend_set_password (backend, priv->auth_info_required, priv->auth_info);
 707   else
 708     gtk_print_backend_set_password (backend, priv->auth_info_required, NULL);
 709
 710   for (i = 0; i < g_strv_length (priv->auth_info_required); i++)
 711     if (priv->auth_info[i] != NULL)
 712       {
 713         memset (priv->auth_info[i], 0, strlen (priv->auth_info[i]));
 714         g_free (priv->auth_info[i]);
 715         priv->auth_info[i] = NULL;
 716       }
 717   g_free (priv->auth_info);
 718   priv->auth_info = NULL;
 719
 720   g_strfreev (priv->auth_info_required);
 721
 722   gtk_widget_destroy (dialog);
 723
 724   g_object_unref (backend);
 725 }
 726
 727 static void
 728 request_password (GtkPrintBackend  *backend,
 729                   gpointer          auth_info_required,
 730                   gpointer          auth_info_default,
 731                   gpointer          auth_info_display,
 732                   gpointer          auth_info_visible,
 733                   const gchar      *prompt)
 734 {
 735   GtkPrintBackendPrivate *priv = backend->priv;
 736   GtkWidget *dialog, *box, *main_box, *label, *icon, *vbox, *entry;
 737   GtkWidget *focus = NULL;
 738   gchar     *markup;
 739   gint       length;
 740   gint       i;
 741   gchar    **ai_required = (gchar **) auth_info_required;
 742   gchar    **ai_default = (gchar **) auth_info_default;
 743   gchar    **ai_display = (gchar **) auth_info_display;
 744   gboolean  *ai_visible = (gboolean *) auth_info_visible;
 745
 746   priv->auth_info_required = g_strdupv (ai_required);
 747   length = g_strv_length (ai_required);
 748   priv->auth_info = g_new0 (gchar *, length);
 749
 750   dialog = gtk_dialog_new_with_buttons ( _("Authentication"), NULL, GTK_DIALOG_MODAL,
 751                                          GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
 752                                          GTK_STOCK_OK, GTK_RESPONSE_OK,
 753                                          NULL);
 754
 755   gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
 756   gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
 757
 758   main_box = gtk_hbox_new (FALSE, 0);
 759
 760   /* Left */
 761   icon = gtk_image_new_from_stock (GTK_STOCK_DIALOG_AUTHENTICATION, GTK_ICON_SIZE_DIALOG);
 762   gtk_misc_set_alignment (GTK_MISC (icon), 0.5, 0.0);
 763   gtk_misc_set_padding (GTK_MISC (icon), 6, 6);
 764
 765
 766   /* Right */
 767   vbox = gtk_vbox_new (FALSE, 0);
 768   gtk_widget_set_size_request (GTK_WIDGET (vbox), 320, -1);
 769
 770   /* Right - 1. */
 771   label = gtk_label_new (NULL);
 772   markup = g_markup_printf_escaped ("<span weight=\"bold\" size=\"large\">%s</span>", prompt);
 773   gtk_label_set_markup (GTK_LABEL (label), markup);
 774   gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
 775   gtk_widget_set_size_request (GTK_WIDGET (label), 320, -1);
 776   g_free (markup);
 777
 778
 779   /* Packing */
 780   gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), main_box, TRUE, FALSE, 0);
 781
 782   gtk_box_pack_start (GTK_BOX (main_box), icon, FALSE, FALSE, 6);
 783   gtk_box_pack_start (GTK_BOX (main_box), vbox, FALSE, FALSE, 6);
 784
 785   gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, TRUE, 6);
 786
 787   /* Right - 2. */
 788   for (i = 0; i < length; i++)
 789     {
 790       priv->auth_info[i] = g_strdup (ai_default[i]);
 791       if (ai_display[i] != NULL)
 792         {
 793           box = gtk_hbox_new (TRUE, 0);
 794
 795           label = gtk_label_new (ai_display[i]);
 796           gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
 797
 798           entry = gtk_entry_new ();
 799           focus = entry;
 800
 801           if (ai_default[i] != NULL)
 802             gtk_entry_set_text (GTK_ENTRY (entry), ai_default[i]);
 803
 804           gtk_entry_set_visibility (GTK_ENTRY (entry), ai_visible[i]);
 805           gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
 806
 807           gtk_box_pack_start (GTK_BOX (vbox), box, FALSE, TRUE, 6);
 808
 809           gtk_box_pack_start (GTK_BOX (box), label, TRUE, TRUE, 0);
 810           gtk_box_pack_start (GTK_BOX (box), entry, TRUE, TRUE, 0);
 811
 812           g_signal_connect (entry, "changed",
 813                             G_CALLBACK (store_entry), &(priv->auth_info[i]));
 814         }
 815     }
 816
 817   if (focus != NULL)
 818     {
 819       gtk_widget_grab_focus (focus);
 820       focus = NULL;
 821     }
 822
 823   g_object_ref (backend);
 824   g_signal_connect (G_OBJECT (dialog), "response",
 825                     G_CALLBACK (password_dialog_response), backend);
 826
 827   gtk_widget_show_all (dialog);
 828 }
 829
 830 void
 831 gtk_print_backend_destroy (GtkPrintBackend *print_backend)
 832 {
 833   /* The lifecycle of print backends and printers are tied, such that
 834    * the backend owns the printers, but the printers also ref the backend.
 835    * This is so that if the app has a reference to a printer its backend
 836    * will be around. However, this results in a cycle, which we break
 837    * with this call, which causes the print backend to release its printers.
 838    */
 839   g_object_run_dispose (G_OBJECT (print_backend));
 840 }
 841
 842
 843 #define __GTK_PRINT_BACKEND_C__
 844 #include "gtkaliasdef.c"