]> Pileus Git - ~andy/gtk/blobdiff - modules/printbackends/cups/gtkprintbackendcups.c
Don't hang print dialog when remote CUPS printer is not available
[~andy/gtk] / modules / printbackends / cups / gtkprintbackendcups.c
index dffb0b52ec94b55349f5630ee4e1933f174ad7c4..f13090ce247c4607ea1f56c3babe2bc9268153d0 100644 (file)
  * Boston, MA 02111-1307, USA.
  */
 
+#ifdef __linux__
+#define _GNU_SOURCE
+#endif
+
 #include "config.h"
 #include <ctype.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <stdlib.h>
+#include <time.h>
 
 #include <cups/cups.h>
 #include <cups/language.h>
@@ -106,11 +111,16 @@ struct _GtkPrintBackendCups
   guint list_printers_poll;
   guint list_printers_pending : 1;
   guint got_default_printer   : 1;
+  guint default_printer_poll;
+  GtkCupsConnectionTest *cups_connection_test;
 
   char **covers;
-  char  *default_cover_before;
-  char  *default_cover_after;
   int    number_of_covers;
+
+  GList      *requests;
+  GHashTable *auth;
+  gchar      *username;
+  gboolean    authentication_lock;
 };
 
 static GObjectClass *backend_parent_class;
@@ -120,6 +130,8 @@ static void                 gtk_print_backend_cups_init            (GtkPrintBack
 static void                 gtk_print_backend_cups_finalize        (GObject                           *object);
 static void                 gtk_print_backend_cups_dispose         (GObject                           *object);
 static void                 cups_get_printer_list                  (GtkPrintBackend                   *print_backend);
+static void                 cups_get_default_printer               (GtkPrintBackendCups               *print_backend);
+static void                 cups_get_local_default_printer         (GtkPrintBackendCups               *print_backend);
 static void                 cups_request_execute                   (GtkPrintBackendCups               *print_backend,
                                                                    GtkCupsRequest                    *request,
                                                                    GtkPrintCupsResponseCallbackFunc   callback,
@@ -141,8 +153,8 @@ static void                 cups_printer_prepare_for_print         (GtkPrinter
 static GList *              cups_printer_list_papers               (GtkPrinter                        *printer);
 static GtkPageSetup *       cups_printer_get_default_page_size     (GtkPrinter                        *printer);
 static void                 cups_printer_request_details           (GtkPrinter                        *printer);
-static void                 cups_request_default_printer           (GtkPrintBackendCups               *print_backend);
-static void                 cups_request_ppd                       (GtkPrinter                        *printer);
+static gboolean             cups_request_default_printer           (GtkPrintBackendCups               *print_backend);
+static gboolean             cups_request_ppd                       (GtkPrinter                        *printer);
 static void                 cups_printer_get_hard_margins          (GtkPrinter                        *printer,
                                                                    double                            *top,
                                                                    double                            *bottom,
@@ -167,6 +179,13 @@ static cairo_surface_t *    cups_printer_create_cairo_surface      (GtkPrinter
                                                                    gdouble                            height,
                                                                    GIOChannel                        *cache_io);
 
+static void                 gtk_print_backend_cups_set_password    (GtkPrintBackend *backend, 
+                                                                    const gchar     *hostname,
+                                                                    const gchar     *username,
+                                                                    const gchar     *password);
+
+void                        overwrite_and_free                      (gpointer data);
+static gboolean             is_address_local                        (const gchar *address);
 
 static void
 gtk_print_backend_cups_register_type (GTypeModule *module)
@@ -262,6 +281,7 @@ gtk_print_backend_cups_class_init (GtkPrintBackendCupsClass *class)
   backend_class->printer_get_default_page_size = cups_printer_get_default_page_size;
   backend_class->printer_get_hard_margins = cups_printer_get_hard_margins;
   backend_class->printer_get_capabilities = cups_printer_get_capabilities;
+  backend_class->set_password = gtk_print_backend_cups_set_password;
 }
 
 static cairo_status_t
@@ -312,6 +332,10 @@ cups_printer_create_cairo_surface (GtkPrinter       *printer,
   cairo_surface_t *surface; 
   ppd_file_t      *ppd_file = NULL;
   ppd_attr_t      *ppd_attr = NULL;
+  ppd_attr_t      *ppd_attr_res = NULL;
+  ppd_attr_t      *ppd_attr_screen_freq = NULL;
+  ppd_attr_t      *ppd_attr_res_screen_freq = NULL;
+  gchar           *res_string = NULL;
   int              level = 2;
  
   /* TODO: check if it is a ps or pdf printer */
@@ -326,6 +350,48 @@ cups_printer_create_cairo_surface (GtkPrinter       *printer,
 
       if (ppd_attr != NULL)
         level = atoi (ppd_attr->value);
+
+      if (gtk_print_settings_get_resolution (settings) == 0)
+        {
+          ppd_attr_res = ppdFindAttr (ppd_file, "DefaultResolution", NULL);
+
+          if (ppd_attr_res != NULL)
+            {
+              int res, res_x, res_y;
+
+              if (sscanf (ppd_attr_res->value, "%dx%ddpi", &res_x, &res_y) == 2)
+                {
+                  if (res_x > 0 && res_y > 0)
+                    gtk_print_settings_set_resolution_xy (settings, res_x, res_y);
+                }
+              else if (sscanf (ppd_attr_res->value, "%ddpi", &res) == 1)
+                {
+                  if (res > 0)
+                    gtk_print_settings_set_resolution (settings, res);
+                }
+            }
+        }
+
+      res_string = g_strdup_printf ("%ddpi", 
+                                    gtk_print_settings_get_resolution (settings));
+      ppd_attr_res_screen_freq = ppdFindAttr (ppd_file, "ResScreenFreq", res_string);
+      g_free (res_string);
+
+      if (ppd_attr_res_screen_freq == NULL)
+        {
+          res_string = g_strdup_printf ("%dx%ddpi", 
+                                        gtk_print_settings_get_resolution_x (settings),
+                                        gtk_print_settings_get_resolution_y (settings));
+          ppd_attr_res_screen_freq = ppdFindAttr (ppd_file, "ResScreenFreq", res_string);
+          g_free (res_string);
+        }
+
+      ppd_attr_screen_freq = ppdFindAttr (ppd_file, "ScreenFreq", NULL);
+
+      if (ppd_attr_res_screen_freq != NULL && atof (ppd_attr_res_screen_freq->value) > 0.0)
+        gtk_print_settings_set_printer_lpi (settings, atof (ppd_attr_res_screen_freq->value));
+      else if (ppd_attr_screen_freq != NULL && atof (ppd_attr_screen_freq->value) > 0.0)
+        gtk_print_settings_set_printer_lpi (settings, atof (ppd_attr_screen_freq->value));
     }
 
   if (level == 2)
@@ -334,8 +400,9 @@ cups_printer_create_cairo_surface (GtkPrinter       *printer,
   if (level == 3)
     cairo_ps_surface_restrict_to_level (surface, CAIRO_PS_LEVEL_3);
 
-  /* TODO: DPI from settings object? */
-  cairo_surface_set_fallback_resolution (surface, 300, 300);
+  cairo_surface_set_fallback_resolution (surface,
+                                         2.0 * gtk_print_settings_get_printer_lpi (settings),
+                                         2.0 * gtk_print_settings_get_printer_lpi (settings));
 
   return surface;
 }
@@ -446,12 +513,13 @@ gtk_print_backend_cups_print_stream (GtkPrintBackend         *print_backend,
   cups_printer = GTK_PRINTER_CUPS (gtk_print_job_get_printer (job));
   settings = gtk_print_job_get_settings (job);
 
-  request = gtk_cups_request_new (NULL,
-                                  GTK_CUPS_POST,
-                                  IPP_PRINT_JOB,
-                                 data_io,
-                                 NULL, 
-                                 cups_printer->device_uri);
+  request = gtk_cups_request_new_with_username (NULL,
+                                                GTK_CUPS_POST,
+                                                IPP_PRINT_JOB,
+                                                data_io,
+                                                NULL,
+                                                cups_printer->device_uri,
+                                                GTK_PRINT_BACKEND_CUPS (print_backend)->username);
 
 #if (CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR >= 2) || CUPS_VERSION_MAJOR > 1
   httpAssembleURIf (HTTP_URI_CODING_ALL,
@@ -496,6 +564,16 @@ gtk_print_backend_cups_print_stream (GtkPrintBackend         *print_backend,
                         (GDestroyNotify)cups_free_print_stream_data);
 }
 
+void overwrite_and_free (gpointer data)
+{
+  gchar *password = (gchar *) data;
+
+  if (password != NULL)
+    {
+      memset (password, 0, strlen (password));
+      g_free (password);
+    }
+}
 
 static void
 gtk_print_backend_cups_init (GtkPrintBackendCups *backend_cups)
@@ -504,12 +582,19 @@ gtk_print_backend_cups_init (GtkPrintBackendCups *backend_cups)
   backend_cups->got_default_printer = FALSE;  
   backend_cups->list_printers_pending = FALSE;
 
+  backend_cups->requests = NULL;
+  backend_cups->auth = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, overwrite_and_free);
+  backend_cups->authentication_lock = FALSE;
+
   backend_cups->covers = NULL;
-  backend_cups->default_cover_before = NULL;
-  backend_cups->default_cover_after = NULL;
   backend_cups->number_of_covers = 0;
 
-  cups_request_default_printer (backend_cups);
+  backend_cups->default_printer_poll = 0;
+  backend_cups->cups_connection_test = NULL;
+
+  backend_cups->username = NULL;
+
+  cups_get_local_default_printer (backend_cups);
 }
 
 static void
@@ -528,9 +613,13 @@ gtk_print_backend_cups_finalize (GObject *object)
   g_strfreev (backend_cups->covers);
   backend_cups->number_of_covers = 0;
 
-  g_free (backend_cups->default_cover_before);
-  g_free (backend_cups->default_cover_after);
-  
+  gtk_cups_connection_test_free (backend_cups->cups_connection_test);
+  backend_cups->cups_connection_test = NULL;
+
+  g_hash_table_destroy (backend_cups->auth);
+
+  g_free (backend_cups->username);
+
   backend_parent_class->finalize (object);
 }
 
@@ -548,19 +637,168 @@ gtk_print_backend_cups_dispose (GObject *object)
     g_source_remove (backend_cups->list_printers_poll);
   backend_cups->list_printers_poll = 0;
   
+  if (backend_cups->default_printer_poll > 0)
+    g_source_remove (backend_cups->default_printer_poll);
+  backend_cups->default_printer_poll = 0;
+
   backend_parent_class->dispose (object);
 }
 
+static gboolean
+is_address_local (const gchar *address)
+{
+  if (address[0] == '/' ||
+      strcmp (address, "127.0.0.1") == 0 ||
+      strcmp (address, "[::1]") == 0)
+    return TRUE;
+  else
+    return FALSE;
+}
+
+static void
+gtk_print_backend_cups_set_password (GtkPrintBackend *backend,
+                                     const gchar     *hostname,
+                                     const gchar     *username, 
+                                     const gchar     *password)
+{
+  GtkPrintBackendCups *cups_backend = GTK_PRINT_BACKEND_CUPS (backend);
+  GList *l;
+  char   dispatch_hostname[HTTP_MAX_URI];
+  gchar *key;
+
+  key = g_strconcat (username, "@", hostname, NULL);
+  g_hash_table_insert (cups_backend->auth, key, g_strdup (password));
+
+  g_free (cups_backend->username);
+  cups_backend->username = g_strdup (username);
+
+  GTK_NOTE (PRINTING,
+            g_print ("CUPS backend: storing password for %s\n", key));
+
+  for (l = cups_backend->requests; l; l = l->next)
+    {
+      GtkPrintCupsDispatchWatch *dispatch = l->data;
+
+      httpGetHostname (dispatch->request->http, dispatch_hostname, sizeof (dispatch_hostname));
+      if (is_address_local (dispatch_hostname))
+        strcpy (dispatch_hostname, "localhost");
+
+      if (strcmp (hostname, dispatch_hostname) == 0) 
+        {
+          overwrite_and_free (dispatch->request->password);
+          dispatch->request->password = g_strdup (password);
+          g_free (dispatch->request->username);
+          dispatch->request->username = g_strdup (username);
+          dispatch->request->password_state = GTK_CUPS_PASSWORD_HAS;
+          dispatch->backend->authentication_lock = FALSE;
+        }
+    }
+}
 
 static gboolean
-cups_dispatch_watch_check (GSource *source)
+request_password (gpointer data)
+{
+  GtkPrintCupsDispatchWatch *dispatch = data;
+  const gchar               *username;
+  gchar                     *password;
+  gchar                     *prompt = NULL;
+  gchar                     *key = NULL;
+  char                       hostname[HTTP_MAX_URI];
+
+  if (dispatch->backend->authentication_lock)
+    return FALSE;
+
+  httpGetHostname (dispatch->request->http, hostname, sizeof (hostname));
+  if (is_address_local (hostname))
+    strcpy (hostname, "localhost");
+
+  if (dispatch->backend->username != NULL)
+    username = dispatch->backend->username;
+  else
+    username = cupsUser ();
+
+  key = g_strconcat (username, "@", hostname, NULL);
+  password = g_hash_table_lookup (dispatch->backend->auth, key);
+
+  if (password && dispatch->request->password_state != GTK_CUPS_PASSWORD_NOT_VALID)
+    {
+      GTK_NOTE (PRINTING,
+                g_print ("CUPS backend: using stored password for %s\n", key));
+
+      overwrite_and_free (dispatch->request->password);
+      dispatch->request->password = g_strdup (password);
+      g_free (dispatch->request->username);
+      dispatch->request->username = g_strdup (username);
+      dispatch->request->password_state = GTK_CUPS_PASSWORD_HAS;
+    }
+  else
+    {
+      const char *job_title = gtk_cups_request_ipp_get_string (dispatch->request, IPP_TAG_NAME, "job-name");
+      const char *printer_uri = gtk_cups_request_ipp_get_string (dispatch->request, IPP_TAG_URI, "printer-uri");
+      char *printer_name = NULL;
+
+      if (printer_uri != NULL && strrchr (printer_uri, '/') != NULL)
+        printer_name = g_strdup (strrchr (printer_uri, '/') + 1);
+
+      if (dispatch->request->password_state == GTK_CUPS_PASSWORD_NOT_VALID)
+        g_hash_table_remove (dispatch->backend->auth, key);
+
+      dispatch->request->password_state = GTK_CUPS_PASSWORD_REQUESTED;
+
+      dispatch->backend->authentication_lock = TRUE;
+
+      switch (dispatch->request->ipp_request->request.op.operation_id)
+        {
+          case 0:
+            prompt = g_strdup_printf ( _("Authentication is required to get a file from %s"), hostname);
+            break;
+          case IPP_PRINT_JOB:
+            if (job_title != NULL && printer_name != NULL)
+              prompt = g_strdup_printf ( _("Authentication is required to print document '%s' on printer %s"), job_title, printer_name);
+            else
+              prompt = g_strdup_printf ( _("Authentication is required to print a document on %s"), hostname);
+            break;
+          case IPP_GET_JOB_ATTRIBUTES:
+            if (job_title != NULL)
+              prompt = g_strdup_printf ( _("Authentication is required to get attributes of job '%s'"), job_title);
+            else
+              prompt = g_strdup ( _("Authentication is required to get attributes of a job"));
+            break;
+          case IPP_GET_PRINTER_ATTRIBUTES:
+            if (printer_name != NULL)
+              prompt = g_strdup_printf ( _("Authentication is required to get attributes of printer %s"), printer_name);
+            else
+              prompt = g_strdup ( _("Authentication is required to get attributes of a printer"));
+            break;
+          case CUPS_GET_DEFAULT:
+            prompt = g_strdup_printf ( _("Authentication is required to get default printer of %s"), hostname);
+            break;
+          case CUPS_GET_PRINTERS:
+            prompt = g_strdup_printf ( _("Authentication is required to get printers from %s"), hostname);
+            break;
+          default:
+            prompt = g_strdup_printf ( _("Authentication is required on %s"), hostname);
+            break;
+        }
+
+      g_free (printer_name);
+
+      g_signal_emit_by_name (dispatch->backend, "request-password", 
+                             hostname, username, prompt);
+
+      g_free (prompt);
+    }
+
+  g_free (key);
+
+  return FALSE;
+}
+
+static void
+cups_dispatch_add_poll (GSource *source)
 {
   GtkPrintCupsDispatchWatch *dispatch;
   GtkCupsPollState poll_state;
-  gboolean result;
-
-  GTK_NOTE (PRINTING,
-            g_print ("CUPS Backend: %s <source %p>\n", G_STRFUNC, source)); 
 
   dispatch = (GtkPrintCupsDispatchWatch *) source;
 
@@ -569,28 +807,43 @@ cups_dispatch_watch_check (GSource *source)
   if (dispatch->request->http != NULL)
     {
       if (dispatch->data_poll == NULL)
-       {
+        {
          dispatch->data_poll = g_new0 (GPollFD, 1);
-         g_source_add_poll (source, dispatch->data_poll);
-       }
-      else
-       {
+
          if (poll_state == GTK_CUPS_HTTP_READ)
            dispatch->data_poll->events = G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_PRI;
          else if (poll_state == GTK_CUPS_HTTP_WRITE)
            dispatch->data_poll->events = G_IO_OUT | G_IO_ERR;
          else
            dispatch->data_poll->events = 0;
-       }
 
 #ifdef HAVE_CUPS_API_1_2
-      dispatch->data_poll->fd = httpGetFd (dispatch->request->http);
+          dispatch->data_poll->fd = httpGetFd (dispatch->request->http);
 #else
-      dispatch->data_poll->fd = dispatch->request->http->fd;
+          dispatch->data_poll->fd = dispatch->request->http->fd;
 #endif
+          g_source_add_poll (source, dispatch->data_poll);
+        }
     }
+}
+
+static gboolean
+cups_dispatch_watch_check (GSource *source)
+{
+  GtkPrintCupsDispatchWatch *dispatch;
+  GtkCupsPollState poll_state;
+  gboolean result;
+
+  GTK_NOTE (PRINTING,
+            g_print ("CUPS Backend: %s <source %p>\n", G_STRFUNC, source)); 
+
+  dispatch = (GtkPrintCupsDispatchWatch *) source;
+
+  poll_state = gtk_cups_request_get_poll_state (dispatch->request);
+
+  cups_dispatch_add_poll (source);
     
-  if (poll_state != GTK_CUPS_HTTP_IDLE)  
+  if (poll_state != GTK_CUPS_HTTP_IDLE && !dispatch->request->need_password)
     if (!(dispatch->data_poll->revents & dispatch->data_poll->events)) 
        return FALSE;
   
@@ -601,6 +854,13 @@ cups_dispatch_watch_check (GSource *source)
       g_free (dispatch->data_poll);
       dispatch->data_poll = NULL;
     }
+
+  if (dispatch->request->need_password && dispatch->request->password_state != GTK_CUPS_PASSWORD_REQUESTED)
+    {
+      dispatch->request->need_password = FALSE;
+      g_idle_add (request_password, dispatch);
+      result = FALSE;
+    }
   
   return result;
 }
@@ -610,6 +870,7 @@ cups_dispatch_watch_prepare (GSource *source,
                             gint    *timeout_)
 {
   GtkPrintCupsDispatchWatch *dispatch;
+  gboolean result;
 
   dispatch = (GtkPrintCupsDispatchWatch *) source;
 
@@ -618,7 +879,11 @@ cups_dispatch_watch_prepare (GSource *source,
 
   *timeout_ = -1;
   
-  return gtk_cups_request_read_write (dispatch->request);
+  result = gtk_cups_request_read_write (dispatch->request);
+
+  cups_dispatch_add_poll (source);
+
+  return result;
 }
 
 static gboolean
@@ -660,12 +925,39 @@ static void
 cups_dispatch_watch_finalize (GSource *source)
 {
   GtkPrintCupsDispatchWatch *dispatch;
+  GtkCupsResult *result;
 
   GTK_NOTE (PRINTING,
             g_print ("CUPS Backend: %s <source %p>\n", G_STRFUNC, source));
 
   dispatch = (GtkPrintCupsDispatchWatch *) source;
 
+  result = gtk_cups_request_get_result (dispatch->request);
+  if (gtk_cups_result_get_error_type (result) == GTK_CUPS_ERROR_AUTH)
+    {
+      const gchar *username;
+      gchar        hostname[HTTP_MAX_URI];
+      gchar       *key;
+    
+      httpGetHostname (dispatch->request->http, hostname, sizeof (hostname));
+      if (is_address_local (hostname))
+        strcpy (hostname, "localhost");
+
+      if (dispatch->backend->username != NULL)
+        username = dispatch->backend->username;
+      else
+        username = cupsUser ();
+
+      key = g_strconcat (username, "@", hostname, NULL);
+      GTK_NOTE (PRINTING,
+                g_print ("CUPS backend: removing stored password for %s\n", key));
+      g_hash_table_remove (dispatch->backend->auth, key);
+      g_free (key);
+      
+      if (dispatch->backend)
+        dispatch->backend->authentication_lock = FALSE;
+    }
+
   gtk_cups_request_free (dispatch->request);
 
   if (dispatch->backend)
@@ -679,6 +971,10 @@ cups_dispatch_watch_finalize (GSource *source)
        * of print backends. See _gtk_print_backend_create for the
        * disabling.
        */
+
+      dispatch->backend->requests = g_list_remove (dispatch->backend->requests, dispatch);
+
+      
       g_object_unref (dispatch->backend);
       dispatch->backend = NULL;
     }
@@ -713,6 +1009,8 @@ cups_request_execute (GtkPrintBackendCups              *print_backend,
   dispatch->backend = g_object_ref (print_backend);
   dispatch->data_poll = NULL;
 
+  print_backend->requests = g_list_prepend (print_backend->requests, dispatch);
+
   g_source_set_callback ((GSource *) dispatch, (GSourceFunc) callback, user_data, notify);
 
   g_source_attach ((GSource *) dispatch, NULL);
@@ -815,12 +1113,13 @@ cups_request_printer_info (GtkPrintBackendCups *print_backend,
       "job-sheets-default"
     };
 
-  request = gtk_cups_request_new (NULL,
-                                  GTK_CUPS_POST,
-                                  IPP_GET_PRINTER_ATTRIBUTES,
-                                 NULL,
-                                 NULL,
-                                 NULL);
+  request = gtk_cups_request_new_with_username (NULL,
+                                                GTK_CUPS_POST,
+                                                IPP_GET_PRINTER_ATTRIBUTES,
+                                                NULL,
+                                                NULL,
+                                                NULL,
+                                                print_backend->username);
 
   printer_uri = g_strdup_printf ("ipp://localhost/printers/%s",
                                   printer_name);
@@ -954,12 +1253,13 @@ cups_request_job_info (CupsJobPollData *data)
   GtkCupsRequest *request;
   gchar *job_uri;
 
-  request = gtk_cups_request_new (NULL,
-                                  GTK_CUPS_POST,
-                                  IPP_GET_JOB_ATTRIBUTES,
-                                 NULL,
-                                 NULL,
-                                 NULL);
+  request = gtk_cups_request_new_with_username (NULL,
+                                                GTK_CUPS_POST,
+                                                IPP_GET_JOB_ATTRIBUTES,
+                                                NULL,
+                                                NULL,
+                                                NULL,
+                                                data->print_backend->username);
 
   job_uri = g_strdup_printf ("ipp://localhost/jobs/%d", data->job_id);
   gtk_cups_request_ipp_add_string (request, IPP_TAG_OPERATION, IPP_TAG_URI,
@@ -1033,6 +1333,7 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
   ipp_t *response;
   gboolean list_has_changed;
   GList *removed_printer_checklist;
+  gchar *remote_default_printer = NULL;
 
   GDK_THREADS_ENTER ();
 
@@ -1046,8 +1347,19 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
   if (gtk_cups_result_is_error (result))
     {
       GTK_NOTE (PRINTING, 
-                g_warning ("CUPS Backend: Error getting printer list: %s", 
-                          gtk_cups_result_get_error_string (result)));
+                g_warning ("CUPS Backend: Error getting printer list: %s %d %d", 
+                           gtk_cups_result_get_error_string (result),
+                           gtk_cups_result_get_error_type (result),
+                           gtk_cups_result_get_error_code (result)));
+
+      if (gtk_cups_result_get_error_type (result) == GTK_CUPS_ERROR_AUTH &&
+          gtk_cups_result_get_error_code (result) == 1)
+        {
+          /* Canceled by user, stop popping up more password dialogs */
+          if (cups_backend->list_printers_poll > 0)
+            g_source_remove (cups_backend->list_printers_poll);
+          cups_backend->list_printers_poll = 0;
+        }
 
       goto done;
     }
@@ -1118,6 +1430,11 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
         };
       gboolean is_paused = FALSE;
       gboolean is_accepting_jobs = TRUE;
+      gboolean default_printer = FALSE;
+      gboolean got_printer_type = FALSE;
+      gchar   *default_cover_before = NULL;
+      gchar   *default_cover_after = NULL;
+      gboolean remote_printer = FALSE;
       
       /* Skip leading attributes until we hit a printer...
        */
@@ -1210,24 +1527,32 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
               {
                 cups_backend->number_of_covers = attr->num_values;
                 cups_backend->covers = g_new (char *, cups_backend->number_of_covers + 1);
-
                 for (i = 0; i < cups_backend->number_of_covers; i++)
                   cups_backend->covers[i] = g_strdup (attr->values[i].string.text);
-
                 cups_backend->covers[cups_backend->number_of_covers] = NULL;
               }
           }
         else if (strcmp (attr->name, "job-sheets-default") == 0)
           {
-            if ( (cups_backend->default_cover_before == NULL) && (cups_backend->default_cover_after == NULL))
+            if (attr->num_values == 2)
               {
-                if (attr->num_values == 2)
-                  {
-                    cups_backend->default_cover_before = g_strdup (attr->values[0].string.text);
-                    cups_backend->default_cover_after = g_strdup (attr->values[1].string.text);
-                  }
+                default_cover_before = attr->values[0].string.text;
+                default_cover_after = attr->values[1].string.text;
               }
           }
+        else if (strcmp (attr->name, "printer-type") == 0)
+          {
+            got_printer_type = TRUE;
+            if (attr->values[0].integer & 0x00020000)
+              default_printer = TRUE;
+            else
+              default_printer = FALSE;
+
+            if (attr->values[0].integer & 0x00000002)
+              remote_printer = TRUE;
+            else
+              remote_printer = FALSE;
+          }
         else
          {
            GTK_NOTE (PRINTING,
@@ -1245,7 +1570,29 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
        else
           continue;
       }
-   
+
+      if (got_printer_type)
+        {
+          if (default_printer && !cups_backend->got_default_printer)
+            {
+              if (!remote_printer)
+                {
+                  cups_backend->got_default_printer = TRUE;
+                  cups_backend->default_printer = g_strdup (printer_name);
+                }
+              else
+                {
+                  if (remote_default_printer == NULL)
+                    remote_default_printer = g_strdup (printer_name);
+                }
+            }
+        }
+      else
+        {
+          if (!cups_backend->got_default_printer)
+            cups_get_default_printer (cups_backend);
+        }
+
       /* remove name from checklist if it was found */
       node = g_list_find_custom (removed_printer_checklist, printer_name, (GCompareFunc) find_printer);
       removed_printer_checklist = g_list_delete_link (removed_printer_checklist, node);
@@ -1260,6 +1607,7 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
          char hostname[HTTP_MAX_URI];  /* Hostname */
          char resource[HTTP_MAX_URI];  /* Resource name */
          int  port;                    /* Port number */
+         char *cups_server;            /* CUPS server */
          
           list_has_changed = TRUE;
          cups_printer = gtk_printer_cups_new (printer_name, backend);
@@ -1306,9 +1654,23 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
             }
 
          gethostname (uri, sizeof (uri));
+         cups_server = g_strdup (cupsServer());
+
          if (strcasecmp (uri, hostname) == 0)
            strcpy (hostname, "localhost");
 
+          /* if the cups server is local and listening at a unix domain socket 
+           * then use the socket connection
+           */
+         if ((strstr (hostname, "localhost") != NULL) &&
+             (cups_server[0] == '/'))
+           strcpy (hostname, cups_server);
+
+         g_free (cups_server);
+
+          cups_printer->default_cover_before = g_strdup (default_cover_before);
+          cups_printer->default_cover_after = g_strdup (default_cover_after);
+
          cups_printer->hostname = g_strdup (hostname);
          cups_printer->port = port;
          
@@ -1324,6 +1686,8 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
       else
        g_object_ref (printer);
 
+      GTK_PRINTER_CUPS (printer)->remote = remote_printer;
+
       gtk_printer_set_is_paused (printer, is_paused);
       gtk_printer_set_is_accepting_jobs (printer, is_accepting_jobs);
 
@@ -1356,10 +1720,13 @@ cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
       if (state_msg != NULL && strlen (state_msg) == 0)
         {
           if (is_paused && !is_accepting_jobs)
+                 /* Translators: this is a printer status. */
             tmp_msg2 = g_strdup ( N_("Paused ; Rejecting Jobs"));
           if (is_paused && is_accepting_jobs)
+                 /* Translators: this is a printer status. */
             tmp_msg2 = g_strdup ( N_("Paused"));
           if (!is_paused && !is_accepting_jobs)
+                 /* Translators: this is a printer status. */
             tmp_msg2 = g_strdup ( N_("Rejecting Jobs"));
 
           if (tmp_msg2 != NULL)
@@ -1443,12 +1810,49 @@ done:
   
   gtk_print_backend_set_list_done (backend);
 
+  if (!cups_backend->got_default_printer && remote_default_printer != NULL)
+    {
+      cups_backend->default_printer = g_strdup (remote_default_printer);
+      cups_backend->got_default_printer = TRUE;
+      g_free (remote_default_printer);
+
+      if (cups_backend->default_printer != NULL)
+        {
+          GtkPrinter *default_printer = NULL;
+          default_printer = gtk_print_backend_find_printer (GTK_PRINT_BACKEND (cups_backend),
+                                                            cups_backend->default_printer);
+          if (default_printer != NULL)
+            {
+              gtk_printer_set_is_default (default_printer, TRUE);
+              g_signal_emit_by_name (GTK_PRINT_BACKEND (cups_backend),
+                                     "printer-status-changed", default_printer);
+            }
+        }
+    }
+
   GDK_THREADS_LEAVE ();
 }
 
+static void
+update_backend_status (GtkPrintBackendCups    *cups_backend,
+                       GtkCupsConnectionState  state)
+{
+  switch (state)
+    {
+    case GTK_CUPS_CONNECTION_NOT_AVAILABLE:
+      g_object_set (cups_backend, "status", GTK_PRINT_BACKEND_STATUS_UNAVAILABLE, NULL);
+      break;
+    case GTK_CUPS_CONNECTION_AVAILABLE:
+      g_object_set (cups_backend, "status", GTK_PRINT_BACKEND_STATUS_OK, NULL);
+      break;
+    default: ;
+    }
+}
+
 static gboolean
 cups_request_printer_list (GtkPrintBackendCups *cups_backend)
 {
+  GtkCupsConnectionState state;
   GtkCupsRequest *request;
   static const char * const pattrs[] = /* Attributes we're interested in */
     {
@@ -1463,21 +1867,28 @@ cups_request_printer_list (GtkPrintBackendCups *cups_backend)
       "queued-job-count",
       "printer-is-accepting-jobs",
       "job-sheets-supported",
-      "job-sheets-default"
+      "job-sheets-default",
+      "printer-type"
     };
-  if (cups_backend->list_printers_pending ||
-      !cups_backend->got_default_printer)
+
+  if (cups_backend->list_printers_pending)
+    return TRUE;
+
+  state = gtk_cups_connection_test_get_state (cups_backend->cups_connection_test);
+  update_backend_status (cups_backend, state);
+
+  if (state == GTK_CUPS_CONNECTION_IN_PROGRESS || state == GTK_CUPS_CONNECTION_NOT_AVAILABLE)
     return TRUE;
 
   cups_backend->list_printers_pending = TRUE;
 
-  request = gtk_cups_request_new (NULL,
-                                  GTK_CUPS_POST,
-                                  CUPS_GET_PRINTERS,
-                                 NULL,
-                                 NULL,
-                                 NULL);
+  request = gtk_cups_request_new_with_username (NULL,
+                                                GTK_CUPS_POST,
+                                                CUPS_GET_PRINTERS,
+                                                NULL,
+                                                NULL,
+                                                NULL,
+                                                cups_backend->username);
 
   gtk_cups_request_ipp_add_strings (request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD,
                                    "requested-attributes", G_N_ELEMENTS (pattrs),
@@ -1498,10 +1909,14 @@ cups_get_printer_list (GtkPrintBackend *backend)
   GtkPrintBackendCups *cups_backend;
 
   cups_backend = GTK_PRINT_BACKEND_CUPS (backend);
+
+  if (cups_backend->cups_connection_test == NULL)
+    cups_backend->cups_connection_test = gtk_cups_connection_test_new (NULL);
+
   if (cups_backend->list_printers_poll == 0)
     {
-      cups_request_printer_list (cups_backend);
-      cups_backend->list_printers_poll = gdk_threads_add_timeout (3000,
+      if (cups_request_printer_list (cups_backend))
+        cups_backend->list_printers_poll = gdk_threads_add_timeout_seconds (3,
                                                         (GSourceFunc) cups_request_printer_list,
                                                         backend);
     }
@@ -1572,7 +1987,7 @@ done:
   GDK_THREADS_LEAVE ();
 }
 
-static void
+static gboolean
 cups_request_ppd (GtkPrinter *printer)
 {
   GError *error;
@@ -1592,6 +2007,26 @@ cups_request_ppd (GtkPrinter *printer)
   GTK_NOTE (PRINTING,
             g_print ("CUPS Backend: %s\n", G_STRFUNC));
 
+  if (cups_printer->remote)
+    {
+      GtkCupsConnectionState state;
+
+      state = gtk_cups_connection_test_get_state (cups_printer->remote_cups_connection_test);
+
+      if (state == GTK_CUPS_CONNECTION_IN_PROGRESS)
+        return TRUE;
+
+      gtk_cups_connection_test_free (cups_printer->remote_cups_connection_test);
+      cups_printer->remote_cups_connection_test = NULL;
+      cups_printer->get_remote_ppd_poll = 0;
+
+      if (state == GTK_CUPS_CONNECTION_NOT_AVAILABLE)
+        {
+          g_signal_emit_by_name (printer, "details-acquired", FALSE);
+          return FALSE;
+        }
+    }
+
   http = httpConnectEncrypt (cups_printer->hostname, 
                             cups_printer->port,
                             cupsEncryption ());
@@ -1621,7 +2056,7 @@ cups_request_ppd (GtkPrinter *printer)
       g_free (data);
 
       g_signal_emit_by_name (printer, "details-acquired", FALSE);
-      return;
+      return FALSE;
     }
     
   data->http = http;
@@ -1635,28 +2070,32 @@ cups_request_ppd (GtkPrinter *printer)
   resource = g_strdup_printf ("/printers/%s.ppd", 
                               gtk_printer_cups_get_ppd_name (GTK_PRINTER_CUPS (printer)));
 
-  request = gtk_cups_request_new (data->http,
-                                  GTK_CUPS_GET,
-                                 0,
-                                  data->ppd_io,
-                                 cups_printer->hostname,
-                                 resource);
+  print_backend = gtk_printer_get_backend (printer);
+
+  request = gtk_cups_request_new_with_username (data->http,
+                                                GTK_CUPS_GET,
+                                                0,
+                                                data->ppd_io,
+                                                cups_printer->hostname,
+                                                resource,
+                                                GTK_PRINT_BACKEND_CUPS (print_backend)->username);
 
   GTK_NOTE (PRINTING,
             g_print ("CUPS Backend: Requesting resource %s to be written to temp file %s\n", resource, ppd_filename));
 
-  g_free (resource);
-  g_free (ppd_filename);
 
   cups_printer->reading_ppd = TRUE;
 
-  print_backend = gtk_printer_get_backend (printer);
-
   cups_request_execute (GTK_PRINT_BACKEND_CUPS (print_backend),
                         request,
                         (GtkPrintCupsResponseCallbackFunc) cups_request_ppd_cb,
                         data,
                         (GDestroyNotify)get_ppd_data_free);
+
+  g_free (resource);
+  g_free (ppd_filename);
+
+  return FALSE;
 }
 
 /* Ordering matters for default preference */
@@ -1812,46 +2251,47 @@ cups_get_user_options (const char     *printer_name,
   return num_options;
 }
 
+/* This function requests default printer from a CUPS server in regular intervals.
+ * In the case of unreachable CUPS server the request is repeated later.
+ * The default printer is not requested in the case of previous success.
+ */
 static void
-cups_request_default_printer_cb (GtkPrintBackendCups *print_backend,
-                                GtkCupsResult       *result,
-                                gpointer             user_data)
+cups_get_default_printer (GtkPrintBackendCups *backend)
 {
-  ipp_t *response;
-  ipp_attribute_t *attr;
+  GtkPrintBackendCups *cups_backend;
 
-  response = gtk_cups_result_get_response (result);
-  
-  if ((attr = ippFindAttribute (response, "printer-name", IPP_TAG_NAME)) != NULL)
-    print_backend->default_printer = g_strdup (attr->values[0].string.text);
+  cups_backend = backend;
 
-  print_backend->got_default_printer = TRUE;
+  if (cups_backend->cups_connection_test == NULL)
+    cups_backend->cups_connection_test = gtk_cups_connection_test_new (NULL);
 
-  /* Make sure to kick off get_printers if we are polling it, 
-   * as we could have blocked this reading the default printer 
-   */
-  if (print_backend->list_printers_poll != 0)
-    cups_request_printer_list (print_backend);
+  if (cups_backend->default_printer_poll == 0)
+    {
+      if (cups_request_default_printer (cups_backend))
+        cups_backend->default_printer_poll = gdk_threads_add_timeout (500,
+                                                                      (GSourceFunc) cups_request_default_printer,
+                                                                      backend);
+    }
 }
 
+/* This function gets default printer from local settings.*/
 static void
-cups_request_default_printer (GtkPrintBackendCups *print_backend)
+cups_get_local_default_printer (GtkPrintBackendCups *backend)
 {
-  GtkCupsRequest *request;
   const char *str;
   char *name = NULL;
 
   if ((str = g_getenv ("LPDEST")) != NULL)
     {
-      print_backend->default_printer = g_strdup (str);
-      print_backend->got_default_printer = TRUE;
+      backend->default_printer = g_strdup (str);
+      backend->got_default_printer = TRUE;
       return;
     }
   else if ((str = g_getenv ("PRINTER")) != NULL &&
           strcmp (str, "lp") != 0)
     {
-      print_backend->default_printer = g_strdup (str);
-      print_backend->got_default_printer = TRUE;
+      backend->default_printer = g_strdup (str);
+      backend->got_default_printer = TRUE;
       return;
     }
   
@@ -1859,23 +2299,90 @@ cups_request_default_printer (GtkPrintBackendCups *print_backend)
   cups_get_user_default_printer (&name);
   if (name != NULL)
     {
-       print_backend->default_printer = name;
-       print_backend->got_default_printer = TRUE;
-       return;
+      backend->default_printer = name;
+      backend->got_default_printer = TRUE;
+      return;
+    }
+}
+
+static void
+cups_request_default_printer_cb (GtkPrintBackendCups *print_backend,
+                                GtkCupsResult       *result,
+                                gpointer             user_data)
+{
+  ipp_t *response;
+  ipp_attribute_t *attr;
+  GtkPrinter *printer;
+
+  GDK_THREADS_ENTER ();
+
+  if (gtk_cups_result_is_error (result))
+    {
+      if (gtk_cups_result_get_error_type (result) == GTK_CUPS_ERROR_AUTH &&
+          gtk_cups_result_get_error_code (result) == 1)
+        {
+          /* Canceled by user, stop popping up more password dialogs */
+          if (print_backend->list_printers_poll > 0)
+            g_source_remove (print_backend->list_printers_poll);
+          print_backend->list_printers_poll = 0;
+        }
+
+      return;
     }
 
-  request = gtk_cups_request_new (NULL,
-                                  GTK_CUPS_POST,
-                                  CUPS_GET_DEFAULT,
-                                 NULL,
-                                 NULL,
-                                 NULL);
+  response = gtk_cups_result_get_response (result);
+  
+  if ((attr = ippFindAttribute (response, "printer-name", IPP_TAG_NAME)) != NULL)
+    print_backend->default_printer = g_strdup (attr->values[0].string.text);
+
+  print_backend->got_default_printer = TRUE;
+
+  if (print_backend->default_printer != NULL)
+    {
+      printer = gtk_print_backend_find_printer (GTK_PRINT_BACKEND (print_backend), print_backend->default_printer);
+      if (printer != NULL)
+        {
+          gtk_printer_set_is_default (printer, TRUE);
+          g_signal_emit_by_name (GTK_PRINT_BACKEND (print_backend), "printer-status-changed", printer);
+        }
+    }
+
+  /* Make sure to kick off get_printers if we are polling it, 
+   * as we could have blocked this reading the default printer 
+   */
+  if (print_backend->list_printers_poll != 0)
+    cups_request_printer_list (print_backend);
+
+  GDK_THREADS_LEAVE ();
+}
+
+static gboolean
+cups_request_default_printer (GtkPrintBackendCups *print_backend)
+{
+  GtkCupsConnectionState state;
+  GtkCupsRequest *request;
+
+  state = gtk_cups_connection_test_get_state (print_backend->cups_connection_test);
+  update_backend_status (print_backend, state);
+
+  if (state == GTK_CUPS_CONNECTION_IN_PROGRESS || state == GTK_CUPS_CONNECTION_NOT_AVAILABLE)
+    return TRUE;
+
+  request = gtk_cups_request_new_with_username (NULL,
+                                                GTK_CUPS_POST,
+                                                CUPS_GET_DEFAULT,
+                                                NULL,
+                                                NULL,
+                                                NULL,
+                                                print_backend->username);
   
   cups_request_execute (print_backend,
                         request,
                         (GtkPrintCupsResponseCallbackFunc) cups_request_default_printer_cb,
                        g_object_ref (print_backend),
                        g_object_unref);
+
+  return FALSE;
 }
 
 static void
@@ -1886,7 +2393,22 @@ cups_printer_request_details (GtkPrinter *printer)
   cups_printer = GTK_PRINTER_CUPS (printer);
   if (!cups_printer->reading_ppd && 
       gtk_printer_cups_get_ppd (cups_printer) == NULL)
-    cups_request_ppd (printer); 
+    {
+      if (cups_printer->remote)
+        {
+          if (cups_printer->get_remote_ppd_poll == 0)
+            {
+              cups_printer->remote_cups_connection_test = gtk_cups_connection_test_new (cups_printer->hostname);
+
+              if (cups_request_ppd (printer))
+                cups_printer->get_remote_ppd_poll = gdk_threads_add_timeout (200,
+                                                    (GSourceFunc) cups_request_ppd,
+                                                    printer);
+            }
+        }
+      else
+        cups_request_ppd (printer);
+    }
 }
 
 static char *
@@ -1952,6 +2474,8 @@ static const struct {
   { "MediaType", N_("Paper Type") },
   { "InputSlot", N_("Paper Source") },
   { "OutputBin", N_("Output Tray") },
+  { "Resolution", N_("Resolution") },
+  { "PreFilter", N_("GhostScript pre-filtering") },
 };
 
 
@@ -1961,12 +2485,41 @@ static const struct {
   const char *translation;
 } cups_choice_translations[] = {
   { "Duplex", "None", N_("One Sided") },
+  /* Translators: this is an option of "Two Sided" */
+  { "Duplex", "DuplexNoTumble", N_("Long Edge (Standard)") },
+  /* Translators: this is an option of "Two Sided" */
+  { "Duplex", "DuplexTumble", N_("Short Edge (Flip)") },
+  /* Translators: this is an option of "Paper Source" */
   { "InputSlot", "Auto", N_("Auto Select") },
+  /* Translators: this is an option of "Paper Source" */
   { "InputSlot", "AutoSelect", N_("Auto Select") },
+  /* Translators: this is an option of "Paper Source" */
   { "InputSlot", "Default", N_("Printer Default") },
+  /* Translators: this is an option of "Paper Source" */
   { "InputSlot", "None", N_("Printer Default") },
+  /* Translators: this is an option of "Paper Source" */
   { "InputSlot", "PrinterDefault", N_("Printer Default") },
+  /* Translators: this is an option of "Paper Source" */
   { "InputSlot", "Unspecified", N_("Auto Select") },
+  /* Translators: this is an option of "Resolution" */
+  { "Resolution", "default", N_("Printer Default") },
+  /* Translators: this is an option of "GhostScript" */
+  { "PreFilter", "EmbedFonts", N_("Embed GhostScript fonts only") },
+  /* Translators: this is an option of "GhostScript" */
+  { "PreFilter", "Level1", N_("Convert to PS level 1") },
+  /* Translators: this is an option of "GhostScript" */
+  { "PreFilter", "Level2", N_("Convert to PS level 2") },
+  /* Translators: this is an option of "GhostScript" */
+  { "PreFilter", "No", N_("No pre-filtering") },
+};
+
+static const struct {
+  const char *name;
+  const char *translation;
+} cups_group_translations[] = {
+/* Translators: "Miscellaneous" is the label for a button, that opens
+   up an extra panel of settings in a print dialog. */
+  { "Miscellaneous", N_("Miscellaneous") },
 };
 
 static const struct {
@@ -2534,6 +3087,7 @@ handle_option (GtkPrinterOptionSet *set,
 {
   GtkPrinterOption *option;
   char *name;
+  int i;
 
   if (STRING_IN_TABLE (ppd_option->keyword, cups_option_blacklist))
     return;
@@ -2582,7 +3136,17 @@ handle_option (GtkPrinterOptionSet *set,
        }
       else
        {
-         option->group = g_strdup (toplevel_group->text);
+         for (i = 0; i < G_N_ELEMENTS (cups_group_translations); i++)
+           {
+             if (strcmp (cups_group_translations[i].name, toplevel_group->name) == 0)
+               {
+                 option->group = g_strdup (_(cups_group_translations[i].translation));
+                 break;
+               }
+           }
+
+         if (i == G_N_ELEMENTS (cups_group_translations))
+           option->group = g_strdup (toplevel_group->text);
        }
 
       set_option_from_settings (option, settings);
@@ -2629,18 +3193,34 @@ cups_printer_get_options (GtkPrinter           *printer,
   char *print_at[] = { "now", "at", "on-hold" };
   char *n_up[] = {"1", "2", "4", "6", "9", "16" };
   char *prio[] = {"100", "80", "50", "30" };
+  /* Translators: These strings name the possible values of the 
+   * job priority option in the print dialog
+   */
   char *prio_display[] = {N_("Urgent"), N_("High"), N_("Medium"), N_("Low") };
+  char *n_up_layout[] = { "lrtb", "lrbt", "rltb", "rlbt", "tblr", "tbrl", "btlr", "btrl" };
+  /* Translators: These strings name the possible arrangements of
+   * multiple pages on a sheet when printing
+   */
+  char *n_up_layout_display[] = { N_("Left to right, top to bottom"), N_("Left to right, bottom to top"), 
+                                  N_("Right to left, top to bottom"), N_("Right to left, bottom to top"), 
+                                  N_("Top to bottom, left to right"), N_("Top to bottom, right to left"), 
+                                  N_("Bottom to top, left to right"), N_("Bottom to top, right to left") };
   char *name;
   int num_opts;
   cups_option_t *opts = NULL;
   GtkPrintBackendCups *backend;
+  GtkTextDirection text_direction;
+  GtkPrinterCups *cups_printer = NULL;
 
 
   set = gtk_printer_option_set_new ();
 
   /* Cups specific, non-ppd related settings */
 
-  option = gtk_printer_option_new ("gtk-n-up", "Pages Per Sheet", GTK_PRINTER_OPTION_TYPE_PICKONE);
+   /* Translators, this string is used to label the pages-per-sheet option 
+    * in the print dialog 
+    */
+  option = gtk_printer_option_new ("gtk-n-up", _("Pages per Sheet"), GTK_PRINTER_OPTION_TYPE_PICKONE);
   gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (n_up),
                                         n_up, n_up);
   gtk_printer_option_set (option, "1");
@@ -2648,10 +3228,36 @@ cups_printer_get_options (GtkPrinter           *printer,
   gtk_printer_option_set_add (set, option);
   g_object_unref (option);
 
+  if (cups_printer_get_capabilities (printer) & GTK_PRINT_CAPABILITY_NUMBER_UP_LAYOUT)
+    {
+      for (i = 0; i < G_N_ELEMENTS (n_up_layout_display); i++)
+        n_up_layout_display[i] = _(n_up_layout_display[i]);
+  
+       /* Translators, this string is used to label the option in the print 
+        * dialog that controls in what order multiple pages are arranged 
+        */
+      option = gtk_printer_option_new ("gtk-n-up-layout", _("Page Ordering"), GTK_PRINTER_OPTION_TYPE_PICKONE);
+      gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (n_up_layout),
+                                             n_up_layout, n_up_layout_display);
+
+      text_direction = gtk_widget_get_default_direction ();
+      if (text_direction == GTK_TEXT_DIR_LTR)
+        gtk_printer_option_set (option, "lrtb");
+      else
+        gtk_printer_option_set (option, "rltb");
+
+      set_option_from_settings (option, settings);
+      gtk_printer_option_set_add (set, option);
+      g_object_unref (option);
+    }
+
   for (i = 0; i < G_N_ELEMENTS(prio_display); i++)
     prio_display[i] = _(prio_display[i]);
   
-  option = gtk_printer_option_new ("gtk-job-prio", "Job Priority", GTK_PRINTER_OPTION_TYPE_PICKONE);
+  /* Translators, this string is used to label the job priority option 
+   * in the print dialog 
+   */
+  option = gtk_printer_option_new ("gtk-job-prio", _("Job Priority"), GTK_PRINTER_OPTION_TYPE_PICKONE);
   gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (prio),
                                         prio, prio_display);
   gtk_printer_option_set (option, "50");
@@ -2659,20 +3265,28 @@ cups_printer_get_options (GtkPrinter           *printer,
   gtk_printer_option_set_add (set, option);
   g_object_unref (option);
 
-  option = gtk_printer_option_new ("gtk-billing-info", "Billing Info", GTK_PRINTER_OPTION_TYPE_STRING);
+  /* Translators, this string is used to label the billing info entry
+   * in the print dialog 
+   */
+  option = gtk_printer_option_new ("gtk-billing-info", _("Billing Info"), GTK_PRINTER_OPTION_TYPE_STRING);
   gtk_printer_option_set (option, "");
   set_option_from_settings (option, settings);
   gtk_printer_option_set_add (set, option);
   g_object_unref (option);
 
   backend = GTK_PRINT_BACKEND_CUPS (gtk_printer_get_backend (printer));
+  cups_printer = GTK_PRINTER_CUPS (printer);
 
-  if (backend != NULL)
+  if (backend != NULL && printer != NULL)
     {
       char *cover_default[] = {"none", "classified", "confidential", "secret", "standard", "topsecret", "unclassified" };
+      /* Translators, these strings are names for various 'standard' cover 
+       * pages that the printing system may support.
+       */
       char *cover_display_default[] = {N_("None"), N_("Classified"), N_("Confidential"), N_("Secret"), N_("Standard"), N_("Top Secret"), N_("Unclassified"),};
       char **cover = NULL;
       char **cover_display = NULL;
+      char **cover_display_translated = NULL;
       gint num_of_covers = 0;
       gpointer value;
       gint j;
@@ -2682,6 +3296,8 @@ cups_printer_get_options (GtkPrinter           *printer,
       cover[num_of_covers] = NULL;
       cover_display = g_new (char *, num_of_covers + 1);
       cover_display[num_of_covers] = NULL;
+      cover_display_translated = g_new (char *, num_of_covers + 1);
+      cover_display_translated[num_of_covers] = NULL;
 
       for (i = 0; i < num_of_covers; i++)
         {
@@ -2697,25 +3313,31 @@ cups_printer_get_options (GtkPrinter           *printer,
         }
 
       for (i = 0; i < num_of_covers; i++)
-        cover_display[i] = _(cover_display[i]);
+        cover_display_translated[i] = _(cover_display[i]);
   
-      option = gtk_printer_option_new ("gtk-cover-before", "Before", GTK_PRINTER_OPTION_TYPE_PICKONE);
+      /* Translators, this is the label used for the option in the print 
+       * dialog that controls the front cover page.
+       */
+      option = gtk_printer_option_new ("gtk-cover-before", _("Before"), GTK_PRINTER_OPTION_TYPE_PICKONE);
       gtk_printer_option_choices_from_array (option, num_of_covers,
-                                        cover, cover_display);
+                                        cover, cover_display_translated);
 
-      if (backend->default_cover_before != NULL)
-        gtk_printer_option_set (option, backend->default_cover_before);
+      if (cups_printer->default_cover_before != NULL)
+        gtk_printer_option_set (option, cups_printer->default_cover_before);
       else
         gtk_printer_option_set (option, "none");
       set_option_from_settings (option, settings);
       gtk_printer_option_set_add (set, option);
       g_object_unref (option);
 
-      option = gtk_printer_option_new ("gtk-cover-after", "After", GTK_PRINTER_OPTION_TYPE_PICKONE);
+      /* Translators, this is the label used for the option in the print 
+       * dialog that controls the back cover page.
+       */
+      option = gtk_printer_option_new ("gtk-cover-after", _("After"), GTK_PRINTER_OPTION_TYPE_PICKONE);
       gtk_printer_option_choices_from_array (option, num_of_covers,
-                                        cover, cover_display);
-      if (backend->default_cover_after != NULL)
-        gtk_printer_option_set (option, backend->default_cover_after);
+                                        cover, cover_display_translated);
+      if (cups_printer->default_cover_after != NULL)
+        gtk_printer_option_set (option, cups_printer->default_cover_after);
       else
         gtk_printer_option_set (option, "none");
       set_option_from_settings (option, settings);
@@ -2724,9 +3346,14 @@ cups_printer_get_options (GtkPrinter           *printer,
 
       g_strfreev (cover);
       g_strfreev (cover_display);
+      g_free (cover_display_translated);
     }
 
-  option = gtk_printer_option_new ("gtk-print-time", "Print at", GTK_PRINTER_OPTION_TYPE_PICKONE);
+  /* Translators: this is the name of the option that controls when
+   * a print job is printed. Possible values are 'now', a specified time,
+   * or 'on hold'
+   */
+  option = gtk_printer_option_new ("gtk-print-time", _("Print at"), GTK_PRINTER_OPTION_TYPE_PICKONE);
   gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (print_at),
                                         print_at, print_at);
   gtk_printer_option_set (option, "now");
@@ -2734,7 +3361,10 @@ cups_printer_get_options (GtkPrinter           *printer,
   gtk_printer_option_set_add (set, option);
   g_object_unref (option);
   
-  option = gtk_printer_option_new ("gtk-print-time-text", "Print at time", GTK_PRINTER_OPTION_TYPE_STRING);
+  /* Translators: this is the name of the option that allows the user
+   * to specify a time when a print job will be printed.
+   */
+  option = gtk_printer_option_new ("gtk-print-time-text", _("Print at time"), GTK_PRINTER_OPTION_TYPE_STRING);
   gtk_printer_option_set (option, "");
   set_option_from_settings (option, settings);
   gtk_printer_option_set_add (set, option);
@@ -2765,6 +3395,10 @@ cups_printer_get_options (GtkPrinter           *printer,
 
          g_ascii_formatd (width, sizeof (width), "%.2f", gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS));
          g_ascii_formatd (height, sizeof (height), "%.2f", gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS));
+          /* Translators: this format is used to display a custom paper
+           * size. The two placeholders are replaced with the width and height
+           * in points. E.g: "Custom 230.4x142.9"
+           */
          custom_name = g_strdup_printf (_("Custom %sx%s"), width, height);
           strncpy (option->defchoice, custom_name, PPD_MAX_NAME);
           g_free (custom_name);
@@ -3075,7 +3709,16 @@ set_option_from_settings (GtkPrinterOption *option,
       else
        {
          int res = gtk_print_settings_get_resolution (settings);
-         if (res != 0)
+         int res_x = gtk_print_settings_get_resolution_x (settings);
+         int res_y = gtk_print_settings_get_resolution_y (settings);
+
+          if (res_x != res_y)
+            {
+             value = g_strdup_printf ("%dx%ddpi", res_x, res_y);
+             gtk_printer_option_set (option, value);
+             g_free (value);
+            }
+          else if (res != 0)
            {
              value = g_strdup_printf ("%ddpi", res);
              gtk_printer_option_set (option, value);
@@ -3091,6 +3734,11 @@ set_option_from_settings (GtkPrinterOption *option,
       map_settings_to_option (option, all_map, G_N_ELEMENTS (all_map),
                              settings, GTK_PRINT_SETTINGS_NUMBER_UP, "number-up");
     }
+  else if (strcmp (option->name, "gtk-n-up-layout") == 0)
+    {
+      map_settings_to_option (option, all_map, G_N_ELEMENTS (all_map),
+                             settings, GTK_PRINT_SETTINGS_NUMBER_UP_LAYOUT, "number-up-layout");
+    }
   else if (strcmp (option->name, "gtk-billing-info") == 0)
     {
       cups_value = gtk_print_settings_get (settings, "cups-job-billing");
@@ -3159,10 +3807,19 @@ foreach_option_get_settings (GtkPrinterOption *option,
                            settings, GTK_PRINT_SETTINGS_QUALITY, "OutputMode");
   else if (strcmp (option->name, "cups-Resolution") == 0)
     {
-      int res = atoi (value);
-      /* TODO: What if resolution is on XXXxYYYdpi form? */
-      if (res != 0)
-       gtk_print_settings_set_resolution (settings, res);
+      int res, res_x, res_y;
+
+      if (sscanf (value, "%dx%ddpi", &res_x, &res_y) == 2)
+        {
+          if (res_x > 0 && res_y > 0)
+            gtk_print_settings_set_resolution_xy (settings, res_x, res_y);
+        }
+      else if (sscanf (value, "%ddpi", &res) == 1)
+        {
+          if (res > 0)
+            gtk_print_settings_set_resolution (settings, res);
+        }
+
       gtk_print_settings_set (settings, option->name, value);
     }
   else if (strcmp (option->name, "gtk-paper-type") == 0)
@@ -3171,6 +3828,9 @@ foreach_option_get_settings (GtkPrinterOption *option,
   else if (strcmp (option->name, "gtk-n-up") == 0)
     map_option_to_settings (value, all_map, G_N_ELEMENTS (all_map),
                            settings, GTK_PRINT_SETTINGS_NUMBER_UP, "number-up");
+  else if (strcmp (option->name, "gtk-n-up-layout") == 0)
+    map_option_to_settings (value, all_map, G_N_ELEMENTS (all_map),
+                           settings, GTK_PRINT_SETTINGS_NUMBER_UP_LAYOUT, "number-up-layout");
   else if (strcmp (option->name, "gtk-billing-info") == 0 && strlen (value) > 0)
     gtk_print_settings_set (settings, "cups-job-billing", value);
   else if (strcmp (option->name, "gtk-job-prio") == 0)
@@ -3187,6 +3847,87 @@ foreach_option_get_settings (GtkPrinterOption *option,
     gtk_print_settings_set (settings, option->name, value);
 }
 
+static gboolean
+supports_am_pm (void)
+{
+  struct tm tmp_tm = { 0 };
+  char   time[8];
+  int    length;
+
+  length = strftime (time, sizeof (time), "%p", &tmp_tm);
+
+  return length != 0;
+}
+
+/* Converts local time to UTC time. Local time has to be in one of these
+ * formats:  HH:MM:SS, HH:MM, HH:MM:SS {am, pm}, HH:MM {am, pm}, HH {am, pm},
+ * {am, pm} HH:MM:SS, {am, pm} HH:MM, {am, pm} HH.
+ * Returns a newly allocated string holding UTC time in HH:MM:SS format
+ * or NULL.
+ */
+gchar *
+localtime_to_utctime (const char *local_time)
+{
+  const char *formats_0[] = {" %I : %M : %S %p ", " %p %I : %M : %S ",
+                             " %H : %M : %S ",
+                             " %I : %M %p ", " %p %I : %M ",
+                             " %H : %M ",
+                             " %I %p ", " %p %I "};
+  const char *formats_1[] = {" %H : %M : %S ", " %H : %M "};
+  const char *end = NULL;
+  struct tm  *actual_local_time;
+  struct tm  *actual_utc_time;
+  struct tm   local_print_time;
+  struct tm   utc_print_time;
+  struct tm   diff_time;
+  gchar      *utc_time = NULL;
+  int         i, n;
+
+  if (local_time == NULL || local_time[0] == '\0')
+    return NULL;
+
+  n = supports_am_pm () ? G_N_ELEMENTS (formats_0) : G_N_ELEMENTS (formats_1);
+
+  for (i = 0; i < n; i++)
+    {
+      local_print_time.tm_hour = 0;
+      local_print_time.tm_min  = 0;
+      local_print_time.tm_sec  = 0;
+
+      if (supports_am_pm ())
+        end = strptime (local_time, formats_0[i], &local_print_time);
+      else
+        end = strptime (local_time, formats_1[i], &local_print_time);
+
+      if (end != NULL && end[0] == '\0')
+        break;
+    }
+
+  if (end != NULL && end[0] == '\0')
+    {
+      time_t rawtime;
+      time (&rawtime);
+
+      actual_utc_time = g_memdup (gmtime (&rawtime), sizeof (struct tm));
+      actual_local_time = g_memdup (localtime (&rawtime), sizeof (struct tm));
+
+      diff_time.tm_hour = actual_utc_time->tm_hour - actual_local_time->tm_hour;
+      diff_time.tm_min  = actual_utc_time->tm_min  - actual_local_time->tm_min;
+      diff_time.tm_sec  = actual_utc_time->tm_sec  - actual_local_time->tm_sec;
+
+      utc_print_time.tm_hour = ((local_print_time.tm_hour + diff_time.tm_hour) + 24) % 24;
+      utc_print_time.tm_min  = ((local_print_time.tm_min  + diff_time.tm_min)  + 60) % 60;
+      utc_print_time.tm_sec  = ((local_print_time.tm_sec  + diff_time.tm_sec)  + 60) % 60;
+
+      utc_time = g_strdup_printf ("%02d:%02d:%02d",
+                                  utc_print_time.tm_hour,
+                                  utc_print_time.tm_min,
+                                  utc_print_time.tm_sec);
+    }
+
+  return utc_time;
+}
+
 static void
 cups_printer_get_settings_from_options (GtkPrinter          *printer,
                                        GtkPrinterOptionSet *options,
@@ -3217,8 +3958,21 @@ cups_printer_get_settings_from_options (GtkPrinter          *printer,
 
       print_at = gtk_print_settings_get (settings, "print-at");
       print_at_time = gtk_print_settings_get (settings, "print-at-time");
+
       if (strcmp (print_at, "at") == 0)
-       gtk_print_settings_set (settings, "cups-job-hold-until", print_at_time);
+        {
+          gchar *utc_time = NULL;
+          
+          utc_time = localtime_to_utctime (print_at_time);
+
+          if (utc_time != NULL)
+            {
+              gtk_print_settings_set (settings, "cups-job-hold-until", utc_time);
+              g_free (utc_time);
+            }
+          else
+            gtk_print_settings_set (settings, "cups-job-hold-until", print_at_time);
+        }
       else if (strcmp (print_at, "on-hold") == 0)
        gtk_print_settings_set (settings, "cups-job-hold-until", "indefinite");
     }
@@ -3286,6 +4040,39 @@ cups_printer_prepare_for_print (GtkPrinter       *printer,
       g_free (custom_name);
     }
 
+  if (gtk_print_settings_get_number_up (settings) > 1)
+    {
+      GtkNumberUpLayout  layout = gtk_print_settings_get_number_up_layout (settings);
+      GEnumClass        *enum_class;
+      GEnumValue        *enum_value;
+
+      switch (gtk_page_setup_get_orientation (page_setup))
+        {
+          case GTK_PAGE_ORIENTATION_PORTRAIT:
+            break;
+          case GTK_PAGE_ORIENTATION_LANDSCAPE:
+            if (layout < 4)
+              layout = layout + 5 - 2 * (layout % 2);
+            else
+              layout = layout - 6 + 4 * (1 - (layout - 4) / 2);
+            break;
+          case GTK_PAGE_ORIENTATION_REVERSE_PORTRAIT:
+            layout = (layout + 3 - 2 * (layout % 2)) % 4 + 4 * (layout / 4);
+            break;
+          case GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE:
+            if (layout < 4)
+              layout = layout + 2 + 4 * (1 - layout / 2);
+            else
+              layout = layout - 3 - 2 * (layout % 2);
+            break;
+        }
+
+      enum_class = g_type_class_ref (GTK_TYPE_NUMBER_UP_LAYOUT);
+      enum_value = g_enum_get_value (enum_class, layout);
+      gtk_print_settings_set (settings, "cups-number-up-layout", enum_value->value_nick);
+      g_type_class_unref (enum_class);
+    }
+
   print_job->rotate_to_orientation = TRUE;
 }
 
@@ -3400,5 +4187,8 @@ cups_printer_get_capabilities (GtkPrinter *printer)
     GTK_PRINT_CAPABILITY_COPIES |
     GTK_PRINT_CAPABILITY_COLLATE |
     GTK_PRINT_CAPABILITY_REVERSE |
+#if (CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR >= 1 && CUPS_VERSION_PATCH >= 15) || (CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR > 1) || CUPS_VERSION_MAJOR > 1
+    GTK_PRINT_CAPABILITY_NUMBER_UP_LAYOUT |
+#endif
     GTK_PRINT_CAPABILITY_NUMBER_UP;
 }