gtk2/modules/printbackends/cups/gtkprintbackendcups.c

/* GTK - The GIMP Toolkit
 * gtkprintbackendcups.h: Default implementation of GtkPrintBackend 
 * for the Common Unix Print System (CUPS)
 * Copyright (C) 2003, Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>

#include <config.h>
#include <cups/cups.h>
#include <cups/language.h>
#include <cups/http.h>
#include <cups/ipp.h>
#include <errno.h>
#include <cairo.h>
#include <cairo-pdf.h>
#include <cairo-ps.h>

#include <glib/gi18n-lib.h>
#include <gmodule.h>

#include <gtk/gtkprintoperation.h>
#include <gtk/gtkprintsettings.h>
#include <gtk/gtkprintbackend.h>
#include <gtk/gtkprinter.h>

#include "gtkprintbackendcups.h"
#include "gtkprintercups.h"

#include "gtkcupsutils.h"


typedef struct _GtkPrintBackendCupsClass GtkPrintBackendCupsClass;

#define GTK_PRINT_BACKEND_CUPS_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINT_BACKEND_CUPS, GtkPrintBackendCupsClass))
#define GTK_IS_PRINT_BACKEND_CUPS_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINT_BACKEND_CUPS))
#define GTK_PRINT_BACKEND_CUPS_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINT_BACKEND_CUPS, GtkPrintBackendCupsClass))

#define _CUPS_MAX_ATTEMPTS 10 
#define _CUPS_MAX_CHUNK_SIZE 8192

#define _CUPS_MAP_ATTR_INT(attr, v, a) {if (!g_ascii_strcasecmp (attr->name, (a))) v = attr->values[0].integer;}
#define _CUPS_MAP_ATTR_STR(attr, v, a) {if (!g_ascii_strcasecmp (attr->name, (a))) v = attr->values[0].string.text;}

static GType print_backend_cups_type = 0;

typedef void (* GtkPrintCupsResponseCallbackFunc) (GtkPrintBackend *print_backend,
                                                   GtkCupsResult *result, 
                                                   gpointer user_data);

typedef enum 
{
  DISPATCH_SETUP,
  DISPATCH_REQUEST,
  DISPATCH_SEND,
  DISPATCH_CHECK,
  DISPATCH_READ,
  DISPATCH_ERROR
} GtkPrintCupsDispatchState;

typedef struct 
{
  GSource source;

  http_t *http;
  GtkCupsRequest *request;
  GPollFD *data_poll;
  GtkPrintBackendCups *backend;

} GtkPrintCupsDispatchWatch;

struct _GtkPrintBackendCupsClass
{
  GtkPrintBackendClass parent_class;
};

struct _GtkPrintBackendCups
{
  GtkPrintBackend parent_instance;

  char *default_printer;
  
  guint list_printers_poll;
  guint list_printers_pending : 1;
  guint got_default_printer : 1;
};

static GObjectClass *backend_parent_class;

static void                 gtk_print_backend_cups_class_init      (GtkPrintBackendCupsClass          *class);
static void                 gtk_print_backend_cups_init            (GtkPrintBackendCups               *impl);
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_request_execute                   (GtkPrintBackendCups               *print_backend,
								    GtkCupsRequest                    *request,
								    GtkPrintCupsResponseCallbackFunc   callback,
								    gpointer                           user_data,
								    GDestroyNotify                     notify,
								    GError                           **err);
static void                 cups_printer_get_settings_from_options (GtkPrinter                        *printer,
								    GtkPrinterOptionSet               *options,
								    GtkPrintSettings                  *settings);
static gboolean             cups_printer_mark_conflicts            (GtkPrinter                        *printer,
								    GtkPrinterOptionSet               *options);
static GtkPrinterOptionSet *cups_printer_get_options               (GtkPrinter                        *printer,
								    GtkPrintSettings                  *settings,
								    GtkPageSetup                      *page_setup);
static void                 cups_printer_prepare_for_print         (GtkPrinter                        *printer,
								    GtkPrintJob                       *print_job,
								    GtkPrintSettings                  *settings,
								    GtkPageSetup                      *page_setup);
static GList *              cups_printer_list_papers               (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 void                 cups_printer_get_hard_margins          (GtkPrinter                        *printer,
								    double                            *top,
								    double                            *bottom,
								    double                            *left,
								    double                            *right);
static void                 set_option_from_settings               (GtkPrinterOption                  *option,
								    GtkPrintSettings                  *setting);
static void                 cups_begin_polling_info                (GtkPrintBackendCups               *print_backend,
								    GtkPrintJob                       *job,
								    int                                job_id);
static gboolean             cups_job_info_poll_timeout             (gpointer                           user_data);
static void                 gtk_print_backend_cups_print_stream    (GtkPrintBackend                   *backend,
								    GtkPrintJob                       *job,
								    gint                               data_fd,
								    GtkPrintJobCompleteFunc            callback,
								    gpointer                           user_data,
								    GDestroyNotify                     dnotify);
static cairo_surface_t *    cups_printer_create_cairo_surface      (GtkPrinter                        *printer,
								    gdouble                            width,
								    gdouble                            height,
								    gint                               cache_fd);


static void
gtk_print_backend_cups_register_type (GTypeModule *module)
{
  static const GTypeInfo print_backend_cups_info =
  {
    sizeof (GtkPrintBackendCupsClass),
    NULL,		/* base_init */
    NULL,		/* base_finalize */
    (GClassInitFunc) gtk_print_backend_cups_class_init,
    NULL,		/* class_finalize */
    NULL,		/* class_data */
    sizeof (GtkPrintBackendCups),
    0,		/* n_preallocs */
    (GInstanceInitFunc) gtk_print_backend_cups_init
  };

  print_backend_cups_type = g_type_module_register_type (module,
                                                         GTK_TYPE_PRINT_BACKEND,
                                                         "GtkPrintBackendCups",
                                                         &print_backend_cups_info, 0);
}

G_MODULE_EXPORT void 
pb_module_init (GTypeModule *module)
{
  gtk_print_backend_cups_register_type (module);
  gtk_printer_cups_register_type (module);
}

G_MODULE_EXPORT void 
pb_module_exit (void)
{

}
  
G_MODULE_EXPORT GtkPrintBackend * 
pb_module_create (void)
{
  return gtk_print_backend_cups_new ();
}

/*
 * GtkPrintBackendCups
 */
GType
gtk_print_backend_cups_get_type (void)
{
  return print_backend_cups_type;
}

/**
 * gtk_print_backend_cups_new:
 *
 * Creates a new #GtkPrintBackendCups object. #GtkPrintBackendCups
 * implements the #GtkPrintBackend interface with direct access to
 * the filesystem using Unix/Linux API calls
 *
 * Return value: the new #GtkPrintBackendCups object
 **/
GtkPrintBackend *
gtk_print_backend_cups_new (void)
{
  return g_object_new (GTK_TYPE_PRINT_BACKEND_CUPS, NULL);
}

static void
gtk_print_backend_cups_class_init (GtkPrintBackendCupsClass *class)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  GtkPrintBackendClass *backend_class = GTK_PRINT_BACKEND_CLASS (class);

  backend_parent_class = g_type_class_peek_parent (class);

  gobject_class->finalize = gtk_print_backend_cups_finalize;
  gobject_class->dispose = gtk_print_backend_cups_dispose;

  backend_class->request_printer_list = cups_get_printer_list; 
  backend_class->print_stream = gtk_print_backend_cups_print_stream;
  backend_class->printer_request_details = cups_printer_request_details;
  backend_class->printer_create_cairo_surface = cups_printer_create_cairo_surface;
  backend_class->printer_get_options = cups_printer_get_options;
  backend_class->printer_mark_conflicts = cups_printer_mark_conflicts;
  backend_class->printer_get_settings_from_options = cups_printer_get_settings_from_options;
  backend_class->printer_prepare_for_print = cups_printer_prepare_for_print;
  backend_class->printer_list_papers = cups_printer_list_papers;
  backend_class->printer_get_hard_margins = cups_printer_get_hard_margins;
}

static cairo_status_t
_cairo_write_to_cups (void *cache_fd_as_pointer,
                      const unsigned char *data,
                      unsigned int         length)
{
  cairo_status_t result;
  gint cache_fd;
  cache_fd = GPOINTER_TO_INT (cache_fd_as_pointer);

  result = CAIRO_STATUS_WRITE_ERROR;
  
  /* write out the buffer */
  if (write (cache_fd, data, length) != -1)
      result = CAIRO_STATUS_SUCCESS;
   
  return result;
}


static cairo_surface_t *
cups_printer_create_cairo_surface (GtkPrinter *printer,
				   gdouble width, 
				   gdouble height,
				   gint cache_fd)
{
  cairo_surface_t *surface; 
 
  /* TODO: check if it is a ps or pdf printer */
  
  surface = cairo_ps_surface_create_for_stream  (_cairo_write_to_cups, GINT_TO_POINTER (cache_fd), width, height);

  /* TODO: DPI from settings object? */
  cairo_ps_surface_set_dpi (surface, 300, 300);

  return surface;
}

typedef struct {
  GtkPrintJobCompleteFunc callback;
  GtkPrintJob *job;
  gpointer user_data;
  GDestroyNotify dnotify;
} CupsPrintStreamData;

static void
cups_free_print_stream_data (CupsPrintStreamData *data)
{
  if (data->dnotify)
    data->dnotify (data->user_data);
  g_object_unref (data->job);
  g_free (data);
}

static void
cups_print_cb (GtkPrintBackendCups *print_backend,
               GtkCupsResult *result,
               gpointer user_data)
{
  GError *error = NULL;
  CupsPrintStreamData *ps = user_data;

  if (gtk_cups_result_is_error (result))
    error = g_error_new_literal (gtk_print_error_quark (),
                                 GTK_PRINT_ERROR_INTERNAL_ERROR,
                                 gtk_cups_result_get_error_string (result));

  if (ps->callback)
    ps->callback (ps->job, ps->user_data, error);

  if (error == NULL)
    {
      int job_id = 0;
      ipp_attribute_t *attr;		/* IPP job-id attribute */
      ipp_t *response = gtk_cups_result_get_response (result);

      if ((attr = ippFindAttribute(response, "job-id", IPP_TAG_INTEGER)) != NULL)
	job_id = attr->values[0].integer;


        if (job_id == 0)
	  gtk_print_job_set_status (ps->job, GTK_PRINT_STATUS_FINISHED);
	else
	  {
	    gtk_print_job_set_status (ps->job, GTK_PRINT_STATUS_PENDING);
	    cups_begin_polling_info (print_backend, ps->job, job_id);
	  }
    }
  else
    gtk_print_job_set_status (ps->job, GTK_PRINT_STATUS_FINISHED_ABORTED);

  
  if (error)
    g_error_free (error);
  
}

static void
add_cups_options (const char *key,
		  const char *value,
		  gpointer  user_data)
{
  GtkCupsRequest *request = user_data;

  if (!g_str_has_prefix (key, "cups-"))
    return;

  if (strcmp (value, "gtk-ignore-value") == 0)
    return;
  
  key = key + strlen("cups-");

  gtk_cups_request_encode_option (request, key, value);
}

static void
gtk_print_backend_cups_print_stream (GtkPrintBackend *print_backend,
                                     GtkPrintJob *job,
				     gint data_fd,
				     GtkPrintJobCompleteFunc callback,
				     gpointer user_data,
				     GDestroyNotify dnotify)
{
  GError *error;
  GtkPrinterCups *cups_printer;
  CupsPrintStreamData *ps;
  GtkCupsRequest *request;
  GtkPrintSettings *settings;
  const gchar *title;

  cups_printer = GTK_PRINTER_CUPS (gtk_print_job_get_printer (job));
  settings = gtk_print_job_get_settings (job);

  error = NULL;

  request = gtk_cups_request_new (NULL,
                                  GTK_CUPS_POST,
                                  IPP_PRINT_JOB,
				  data_fd,
				  NULL,
				  cups_printer->device_uri);

  gtk_cups_request_ipp_add_string (request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri",
                                   NULL, cups_printer->printer_uri);

  gtk_cups_request_ipp_add_string (request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                                   NULL, cupsUser());

  title = gtk_print_job_get_title (job);
  if (title)
    gtk_cups_request_ipp_add_string (request, IPP_TAG_OPERATION, IPP_TAG_NAME, "job-name", NULL,
                                     title);

  gtk_print_settings_foreach (settings, add_cups_options, request);
  
  ps = g_new0 (CupsPrintStreamData, 1);
  ps->callback = callback;
  ps->user_data = user_data;
  ps->dnotify = dnotify;
  ps->job = g_object_ref (job);

  cups_request_execute (GTK_PRINT_BACKEND_CUPS (print_backend),
                        request,
                        (GtkPrintCupsResponseCallbackFunc) cups_print_cb,
                        ps,
                        (GDestroyNotify)cups_free_print_stream_data,
                        &error);
}


static void
gtk_print_backend_cups_init (GtkPrintBackendCups *backend_cups)
{
  backend_cups->list_printers_poll = 0;  
  backend_cups->list_printers_pending = FALSE;

  cups_request_default_printer (backend_cups);
}

static void
gtk_print_backend_cups_finalize (GObject *object)
{
  GtkPrintBackendCups *backend_cups;

  backend_cups = GTK_PRINT_BACKEND_CUPS (object);

  g_free (backend_cups->default_printer);
  backend_cups->default_printer = NULL;
  
  backend_parent_class->finalize (object);
}

static void
gtk_print_backend_cups_dispose (GObject *object)
{
  GtkPrintBackendCups *backend_cups;

  backend_cups = GTK_PRINT_BACKEND_CUPS (object);

  if (backend_cups->list_printers_poll > 0)
    g_source_remove (backend_cups->list_printers_poll);
  backend_cups->list_printers_poll = 0;
  
  backend_parent_class->dispose (object);
}


static gboolean
cups_dispatch_watch_check (GSource *source)
{
  GtkPrintCupsDispatchWatch *dispatch;
  GtkCupsPollState poll_state;
  gboolean result;

  dispatch = (GtkPrintCupsDispatchWatch *) source;

  poll_state = gtk_cups_request_get_poll_state (dispatch->request);
  
  if (dispatch->data_poll == NULL && 
      dispatch->request->http != NULL)
    {
      dispatch->data_poll = g_new0 (GPollFD, 1);
      dispatch->data_poll->fd = dispatch->request->http->fd;

      g_source_add_poll (source, dispatch->data_poll);
    }
            
  if (dispatch->data_poll != NULL && dispatch->request->http != NULL)
    {
      if (dispatch->data_poll->fd != dispatch->request->http->fd)
        dispatch->data_poll->fd = dispatch->request->http->fd;

      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;
    }
    
  if (poll_state != GTK_CUPS_HTTP_IDLE)  
    if (!(dispatch->data_poll->revents & dispatch->data_poll->events)) 
       return FALSE;
  
  result = gtk_cups_request_read_write (dispatch->request);
  if (result && dispatch->data_poll != NULL)
    {
      g_source_remove_poll (source, dispatch->data_poll);
      g_free (dispatch->data_poll);
      dispatch->data_poll = NULL;
    }
  
  return result;
}

static gboolean
cups_dispatch_watch_prepare (GSource *source,
			     gint *timeout_)
{
  GtkPrintCupsDispatchWatch *dispatch;

  dispatch = (GtkPrintCupsDispatchWatch *) source;
 
  *timeout_ = -1;
  
  return gtk_cups_request_read_write (dispatch->request);
}

static gboolean
cups_dispatch_watch_dispatch (GSource *source,
			      GSourceFunc callback,
			      gpointer user_data)
{
  GtkPrintCupsDispatchWatch *dispatch;
  GtkPrintCupsResponseCallbackFunc ep_callback;  
  GtkCupsResult *result;
  
  g_assert (callback != NULL);

  ep_callback = (GtkPrintCupsResponseCallbackFunc) callback;
  
  dispatch = (GtkPrintCupsDispatchWatch *) source;

  result = gtk_cups_request_get_result (dispatch->request);

  if (gtk_cups_result_is_error (result))
    g_warning (gtk_cups_result_get_error_string (result));

  ep_callback (GTK_PRINT_BACKEND (dispatch->backend), result, user_data);

  return FALSE;
}

static void
cups_dispatch_watch_finalize (GSource *source)
{
  GtkPrintCupsDispatchWatch *dispatch;

  dispatch = (GtkPrintCupsDispatchWatch *) source;

  gtk_cups_request_free (dispatch->request);

  if (dispatch->backend)
    {
      /* We need to unref this at idle time, because it might be the
	 last reference to this module causing the code to be
	 unloaded (including this particular function!)
      */
      gtk_print_backend_unref_at_idle (GTK_PRINT_BACKEND (dispatch->backend));
      dispatch->backend = NULL;
    }

  if (dispatch->data_poll != NULL)
    g_free (dispatch->data_poll);
}

static GSourceFuncs _cups_dispatch_watch_funcs = {
  cups_dispatch_watch_prepare,
  cups_dispatch_watch_check,
  cups_dispatch_watch_dispatch,
  cups_dispatch_watch_finalize
};


static void
cups_request_execute (GtkPrintBackendCups *print_backend,
                      GtkCupsRequest *request,
                      GtkPrintCupsResponseCallbackFunc callback,
                      gpointer user_data,
                      GDestroyNotify notify,
                      GError **err)
{
  GtkPrintCupsDispatchWatch *dispatch;

  dispatch = (GtkPrintCupsDispatchWatch *) g_source_new (&_cups_dispatch_watch_funcs, 
                                                         sizeof (GtkPrintCupsDispatchWatch));

  dispatch->request = request;
  dispatch->backend = g_object_ref (print_backend);
  dispatch->data_poll = NULL;

  g_source_set_callback ((GSource *) dispatch, (GSourceFunc) callback, user_data, notify);

  g_source_attach ((GSource *) dispatch, NULL);
  g_source_unref ((GSource *) dispatch);
}

static void
cups_request_printer_info_cb (GtkPrintBackendCups *backend,
                              GtkCupsResult *result,
                              gpointer user_data)
{
  ipp_attribute_t *attr;
  ipp_t *response;
  gchar *printer_name;
  GtkPrinterCups *cups_printer;
  GtkPrinter *printer;
  gchar *loc;
  gchar *desc;
  gchar *state_msg;
  int job_count;
  gboolean status_changed;  

  g_assert (GTK_IS_PRINT_BACKEND_CUPS (backend));

  printer_name = (gchar *)user_data;
  printer = gtk_print_backend_find_printer (GTK_PRINT_BACKEND (backend),
					    printer_name);

  if (!printer)
    return;

  cups_printer = GTK_PRINTER_CUPS (printer);
  
  if (gtk_cups_result_is_error (result))
    {
      if (gtk_printer_is_new (printer))
	{
	  gtk_print_backend_remove_printer (GTK_PRINT_BACKEND (backend),
					    printer);
	  return;
	}
      else
	return; /* TODO: mark as inactive printer */
    }

  response = gtk_cups_result_get_response (result);

  /* TODO: determine printer type and use correct icon */
  gtk_printer_set_icon_name (printer, "printer");
 
  state_msg = "";
  loc = "";
  desc = "";
  job_count = 0;
  for (attr = response->attrs; attr != NULL; attr = attr->next) 
    {
      if (!attr->name)
        continue;

      _CUPS_MAP_ATTR_STR (attr, loc, "printer-location");
      _CUPS_MAP_ATTR_STR (attr, desc, "printer-info");
      _CUPS_MAP_ATTR_STR (attr, state_msg, "printer-state-message");
      _CUPS_MAP_ATTR_INT (attr, cups_printer->state, "printer-state");
      _CUPS_MAP_ATTR_INT (attr, job_count, "queued-job-count");
    }

  status_changed = gtk_printer_set_job_count (printer, job_count);
  
  status_changed |= gtk_printer_set_location (printer, loc);
  status_changed |= gtk_printer_set_description (printer, desc);
  status_changed |= gtk_printer_set_state_message (printer, state_msg);

  if (status_changed)
    g_signal_emit_by_name (GTK_PRINT_BACKEND (backend),
			   "printer-status-changed", printer); 
}

static void
cups_request_printer_info (GtkPrintBackendCups *print_backend,
                           const gchar *printer_name)
{
  GError *error;
  GtkCupsRequest *request;
  gchar *printer_uri;
  static const char * const pattrs[] =	/* Attributes we're interested in */
    {
      "printer-location",
      "printer-info",
      "printer-state-message",
      "printer-state",
      "queued-job-count"
    };

  error = NULL;

  request = gtk_cups_request_new (NULL,
                                  GTK_CUPS_POST,
                                  IPP_GET_PRINTER_ATTRIBUTES,
				  0,
				  NULL,
				  NULL);

  printer_uri = g_strdup_printf ("ipp://localhost/printers/%s",
                                  printer_name);
  gtk_cups_request_ipp_add_string (request, IPP_TAG_OPERATION, IPP_TAG_URI,
                                   "printer-uri", NULL, printer_uri);

  g_free (printer_uri);

  gtk_cups_request_ipp_add_strings (request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD,
				    "requested-attributes", G_N_ELEMENTS (pattrs),
				    NULL, pattrs);
 
  cups_request_execute (print_backend,
                        request,
                        (GtkPrintCupsResponseCallbackFunc) cups_request_printer_info_cb,
                        g_strdup (printer_name),
                        (GDestroyNotify) g_free,
                        &error);
 
}


typedef struct {
  GtkPrintBackendCups *print_backend;
  GtkPrintJob *job;
  int job_id;
  int counter;
} CupsJobPollData;

static void
job_object_died	(gpointer user_data,
		 GObject  *where_the_object_was)
{
  CupsJobPollData *data = user_data;
  data->job = NULL;
}

static void
cups_job_poll_data_free (CupsJobPollData *data)
{
  if (data->job)
    g_object_weak_unref (G_OBJECT (data->job), job_object_died, data);
    
  g_free (data);
}

static void
cups_request_job_info_cb (GtkPrintBackendCups *print_backend,
			  GtkCupsResult *result,
			  gpointer user_data)
{
  CupsJobPollData *data = user_data;
  ipp_attribute_t *attr;
  ipp_t *response;
  int state;
  gboolean done;

  if (data->job == NULL)
    {
      cups_job_poll_data_free (data);
      return;
    }

  data->counter++;
  
  response = gtk_cups_result_get_response (result);

  state = 0;
  for (attr = response->attrs; attr != NULL; attr = attr->next) 
    {
      if (!attr->name)
        continue;
      
      _CUPS_MAP_ATTR_INT (attr, state, "job-state");
    }
  
  done = FALSE;
  switch (state)
    {
    case IPP_JOB_PENDING:
    case IPP_JOB_HELD:
    case IPP_JOB_STOPPED:
      gtk_print_job_set_status (data->job,
				GTK_PRINT_STATUS_PENDING);
      break;
    case IPP_JOB_PROCESSING:
      gtk_print_job_set_status (data->job,
				GTK_PRINT_STATUS_PRINTING);
      break;
    default:
    case IPP_JOB_CANCELLED:
    case IPP_JOB_ABORTED:
      gtk_print_job_set_status (data->job,
				GTK_PRINT_STATUS_FINISHED_ABORTED);
      done = TRUE;
      break;
    case 0:
    case IPP_JOB_COMPLETED:
      gtk_print_job_set_status (data->job,
				GTK_PRINT_STATUS_FINISHED);
      done = TRUE;
      break;
    }

  if (!done && data->job != NULL)
    {
      guint32 timeout;

      if (data->counter < 5)
	timeout = 100;
      else if (data->counter < 10)
	timeout = 500;
      else
	timeout = 1000;
      
      g_timeout_add (timeout, cups_job_info_poll_timeout, data);
    }
  else
    cups_job_poll_data_free (data);    
}

static void
cups_request_job_info (CupsJobPollData *data)
{
  GError *error;
  GtkCupsRequest *request;
  gchar *printer_uri;

  
  error = NULL;
  request = gtk_cups_request_new (NULL,
                                  GTK_CUPS_POST,
                                  IPP_GET_JOB_ATTRIBUTES,
				  0,
				  NULL,
				  NULL);

  printer_uri = g_strdup_printf ("ipp://localhost/jobs/%d", data->job_id);
  gtk_cups_request_ipp_add_string (request, IPP_TAG_OPERATION, IPP_TAG_URI,
                                   "job-uri", NULL, printer_uri);
  g_free (printer_uri);

  cups_request_execute (data->print_backend,
                        request,
                        (GtkPrintCupsResponseCallbackFunc) cups_request_job_info_cb,
                        data,
                        NULL,
                        &error);
}

static gboolean
cups_job_info_poll_timeout (gpointer user_data)
{
  CupsJobPollData *data = user_data;
  
  if (data->job == NULL)
    cups_job_poll_data_free (data);
  else
    cups_request_job_info (data);
  
  return FALSE;
}

static void
cups_begin_polling_info (GtkPrintBackendCups *print_backend,
			 GtkPrintJob *job,
			 int job_id)
{
  CupsJobPollData *data;

  data = g_new0 (CupsJobPollData, 1);

  data->print_backend = print_backend;
  data->job = job;
  data->job_id = job_id;
  data->counter = 0;

  g_object_weak_ref (G_OBJECT (job), job_object_died, data);

  cups_request_job_info (data);
}

static void
mark_printer_inactive (GtkPrinter *printer, 
                       GtkPrintBackend *backend)
{
  gtk_printer_set_is_active (printer, FALSE);
  g_signal_emit_by_name (backend,
			 "printer-removed", printer);
}

static gint
find_printer (GtkPrinter *printer, const char *find_name)
{
  const char *printer_name;

  printer_name = gtk_printer_get_name (printer);
  return g_ascii_strcasecmp (printer_name, find_name);
}

static void
cups_request_printer_list_cb (GtkPrintBackendCups *cups_backend,
                              GtkCupsResult *result,
                              gpointer user_data)
{
  ipp_attribute_t *attr;
  ipp_t *response;
  gboolean list_has_changed;
  GList *removed_printer_checklist;

  list_has_changed = FALSE;

  g_assert (GTK_IS_PRINT_BACKEND_CUPS (cups_backend));

  cups_backend->list_printers_pending = FALSE;

  if (gtk_cups_result_is_error (result))
    {
      g_warning ("Error getting printer list: %s", gtk_cups_result_get_error_string (result));
      return;
    }
  
  /* gether the names of the printers in the current queue
     so we may check to see if they were removed */
  removed_printer_checklist = gtk_print_backend_get_printer_list (GTK_PRINT_BACKEND (cups_backend));
								  
  response = gtk_cups_result_get_response (result);


  for (attr = response->attrs; attr != NULL; attr = attr->next)
    {
      GtkPrinter *printer;
      const gchar *printer_name;
      const char *printer_uri;
      const char *member_uris;
      GList *node;
      
      /*
      * Skip leading attributes until we hit a printer...
      */
      while (attr != NULL && attr->group_tag != IPP_TAG_PRINTER)
        attr = attr->next;

      if (attr == NULL)
        break;

      printer_name = NULL;
      printer_uri = NULL;
      member_uris = NULL;
      while (attr != NULL && attr->group_tag == IPP_TAG_PRINTER)
      {
        if (!strcmp(attr->name, "printer-name") &&
	    attr->value_tag == IPP_TAG_NAME)
	  printer_name = attr->values[0].string.text;
	else if (!strcmp(attr->name, "printer-uri-supported") &&
		 attr->value_tag == IPP_TAG_URI)
	  printer_uri = attr->values[0].string.text;
	else if (!strcmp(attr->name, "member-uris") &&
		 attr->value_tag == IPP_TAG_URI)
	  member_uris = attr->values[0].string.text;

        attr = attr->next;
      }

      if (printer_name == NULL ||
	  (printer_uri == NULL && member_uris == NULL))
      {
        if (attr == NULL)
	  break;
	else
          continue;
      }
   
      /* 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);
 
      printer = gtk_print_backend_find_printer (GTK_PRINT_BACKEND (cups_backend), printer_name);
      if (!printer)
        {
	  GtkPrinterCups *cups_printer;
	  char uri[HTTP_MAX_URI],	/* Printer URI */
	    method[HTTP_MAX_URI],	/* Method/scheme name */
	    username[HTTP_MAX_URI],	/* Username:password */
	    hostname[HTTP_MAX_URI],	/* Hostname */
	    resource[HTTP_MAX_URI];	/* Resource name */
	  int  port;			/* Port number */
	  
          list_has_changed = TRUE;
	  cups_printer = gtk_printer_cups_new (printer_name,
					       GTK_PRINT_BACKEND (cups_backend));

	  cups_printer->device_uri = g_strdup_printf ("/printers/%s", printer_name);

	  if (member_uris)
	    {
	      cups_printer->printer_uri = g_strdup (member_uris);
	    }
	  else
	    cups_printer->printer_uri = g_strdup (printer_uri);

#if (CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR >= 2) || CUPS_VERSION_MAJOR > 1
	  httpSeparateURI (HTTP_URI_CODING_ALL, cups_printer->printer_uri, 
			   method, sizeof (method), 
			   username, sizeof (username),
			   hostname, sizeof (hostname),
			   &port, 
			   resource, sizeof (resource));

#else
	  httpSeparate (cups_printer->printer_uri, 
			method, 
			username, 
			hostname,
			&port, 
			resource);
#endif

	  gethostname(uri, sizeof(uri));
	  if (strcasecmp(uri, hostname) == 0)
	    strcpy(hostname, "localhost");

	  cups_printer->hostname = g_strdup (hostname);
	  cups_printer->port = port;
	  
	  printer = GTK_PRINTER (cups_printer);
	  
	  if (cups_backend->default_printer != NULL &&
	      strcmp (cups_backend->default_printer, gtk_printer_get_name (printer)) == 0)
	    gtk_printer_set_is_default (printer, TRUE);

	  
	  gtk_print_backend_add_printer (GTK_PRINT_BACKEND (cups_backend), printer);
        }
      else
	g_object_ref (printer);

      if (!gtk_printer_is_active (printer))
        {
	  gtk_printer_set_is_active (printer, TRUE);
	  gtk_printer_set_is_new (printer, TRUE);
          list_has_changed = TRUE;
        }

      if (gtk_printer_is_new (printer))
        {
           g_signal_emit_by_name (GTK_PRINT_BACKEND (cups_backend), 
                                  "printer-added",
                                  printer);

	  gtk_printer_set_is_new (printer, FALSE);
        }

      cups_request_printer_info (cups_backend, gtk_printer_get_name (printer));

      /* The ref is held by GtkPrintBackend, in add_printer() */
      g_object_unref (printer);

      
      if (attr == NULL)
        break;
    }

  /* look at the removed printers checklist and mark any printer
     as inactive if it is in the list, emitting a printer_removed signal */
  if (removed_printer_checklist != NULL)
    {
      g_list_foreach (removed_printer_checklist, (GFunc) mark_printer_inactive,
		      GTK_PRINT_BACKEND (cups_backend));
      g_list_free (removed_printer_checklist);
      list_has_changed = TRUE;
    }
  
  if (list_has_changed)
    g_signal_emit_by_name (GTK_PRINT_BACKEND (cups_backend), "printer-list-changed");
  
  gtk_print_backend_set_list_done (GTK_PRINT_BACKEND (cups_backend));
}

static gboolean
cups_request_printer_list (GtkPrintBackendCups *cups_backend)
{
  GError *error;
  GtkCupsRequest *request;
  static const char * const pattrs[] =	/* Attributes we're interested in */
    {
      "printer-name",
      "printer-uri-supported",
      "member-uris"
    };
 
  if (cups_backend->list_printers_pending ||
      !cups_backend->got_default_printer)
    return TRUE;

  cups_backend->list_printers_pending = TRUE;

  error = NULL;

  request = gtk_cups_request_new (NULL,
                                  GTK_CUPS_POST,
                                  CUPS_GET_PRINTERS,
				  0,
				  NULL,
				  NULL);

  gtk_cups_request_ipp_add_strings (request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD,
				    "requested-attributes", G_N_ELEMENTS (pattrs),
				    NULL, pattrs);

  cups_request_execute (cups_backend,
                        request,
                        (GtkPrintCupsResponseCallbackFunc) cups_request_printer_list_cb,
		        request,
		        NULL,
                        &error);


  return TRUE;
}

static void
cups_get_printer_list (GtkPrintBackend *backend)
{
  GtkPrintBackendCups *cups_backend;

  cups_backend = GTK_PRINT_BACKEND_CUPS (backend);
  if (cups_backend->list_printers_poll == 0)
    {
      cups_request_printer_list (cups_backend);
      cups_backend->list_printers_poll = g_timeout_add (3000 * 100000,
                                                        (GSourceFunc) cups_request_printer_list,
                                                        backend);
    }
}

typedef struct {
  GtkPrinterCups *printer;
  gint ppd_fd;
  gchar *ppd_filename;
} GetPPDData;

static void
get_ppd_data_free (GetPPDData *data)
{
  close (data->ppd_fd);
  unlink (data->ppd_filename);
  g_free (data->ppd_filename);
  g_object_unref (data->printer);
  g_free (data);
}

static void
cups_request_ppd_cb (GtkPrintBackendCups *print_backend,
                     GtkCupsResult *result,
                     GetPPDData *data)
{
  ipp_t *response;
  GtkPrinter *printer;

  printer = GTK_PRINTER (data->printer);
  GTK_PRINTER_CUPS (printer)->reading_ppd = FALSE;

  if (gtk_cups_result_is_error (result))
    {
      g_signal_emit_by_name (printer, "details-acquired", printer, FALSE);
      return;
    }

  response = gtk_cups_result_get_response (result);

  data->printer->ppd_file = ppdOpenFile (data->ppd_filename);
  gtk_printer_set_has_details (printer, TRUE);
  g_signal_emit_by_name (printer, "details-acquired", printer, TRUE);
}

static void
cups_request_ppd (GtkPrinter      *printer)
{
  GError *error;
  GtkPrintBackend *print_backend;
  GtkPrinterCups *cups_printer;
  GtkCupsRequest *request;
  gchar *resource;
  http_t *http;
  GetPPDData *data;
  
  cups_printer = GTK_PRINTER_CUPS (printer);

  error = NULL;

  http = httpConnectEncrypt(cups_printer->hostname, 
                            cups_printer->port,
                            cupsEncryption());

  data = g_new0 (GetPPDData, 1);

  data->ppd_fd = g_file_open_tmp ("gtkprint_ppd_XXXXXX", 
                                  &data->ppd_filename, 
                                  &error);

  if (error != NULL)
    {
      g_warning ("%s", error->message);
      g_error_free (error);
      httpClose (http);
      g_free (data);

      g_signal_emit_by_name (printer, "details-acquired", printer, FALSE);
      return;
    }
    
  fchmod (data->ppd_fd, S_IRUSR | S_IWUSR);

  data->printer = g_object_ref (printer);

  resource = g_strdup_printf ("/printers/%s.ppd", gtk_printer_get_name (printer));
  request = gtk_cups_request_new (http,
                                  GTK_CUPS_GET,
				  0,
                                  data->ppd_fd,
				  cups_printer->hostname,
				  resource);

  g_free (resource);
 
  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,
                        &error);
}


static void
cups_request_default_printer_cb (GtkPrintBackendCups *print_backend,
				 GtkCupsResult *result,
				 gpointer user_data)
{
  ipp_t *response;
  ipp_attribute_t *attr;

  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;

  /* 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);
}

static void
cups_request_default_printer (GtkPrintBackendCups *print_backend)
{
  GError *error;
  GtkCupsRequest *request;
  const char *str;

  error = NULL;

  if ((str = getenv("LPDEST")) != NULL)
    {
      print_backend->default_printer = g_strdup (str);
      print_backend->got_default_printer = TRUE;
      return;
    }
  else if ((str = getenv("PRINTER")) != NULL &&
	   strcmp(str, "lp") != 0)
    {
      print_backend->default_printer = g_strdup (str);
      print_backend->got_default_printer = TRUE;
      return;
    }
  
  request = gtk_cups_request_new (NULL,
                                  GTK_CUPS_POST,
                                  CUPS_GET_DEFAULT,
				  0,
				  NULL,
				  NULL);
  
  cups_request_execute (print_backend,
                        request,
                        (GtkPrintCupsResponseCallbackFunc) cups_request_default_printer_cb,
		        g_object_ref (print_backend),
		        g_object_unref,
                        &error);
}


static void
cups_printer_request_details (GtkPrinter *printer)
{
  GtkPrinterCups *cups_printer;

  cups_printer = GTK_PRINTER_CUPS (printer);
  if (!cups_printer->reading_ppd && 
      gtk_printer_cups_get_ppd (cups_printer) == NULL)
    cups_request_ppd (printer); 
}

static char *
ppd_text_to_utf8 (ppd_file_t *ppd_file, const char *text)
{
  const char *encoding = NULL;
  char *res;
  
  if (g_ascii_strcasecmp (ppd_file->lang_encoding, "UTF-8") == 0)
    {
      return g_strdup (text);
    }
  else if (g_ascii_strcasecmp (ppd_file->lang_encoding, "ISOLatin1") == 0)
    {
      encoding = "ISO-8859-1";
    }
  else if (g_ascii_strcasecmp (ppd_file->lang_encoding, "ISOLatin2") == 0)
    {
      encoding = "ISO-8859-2";
    }
  else if (g_ascii_strcasecmp (ppd_file->lang_encoding, "ISOLatin5") == 0)
    {
      encoding = "ISO-8859-5";
    }
  else if (g_ascii_strcasecmp (ppd_file->lang_encoding, "JIS83-RKSJ") == 0)
    {
      encoding = "SHIFT-JIS";
    }
  else if (g_ascii_strcasecmp (ppd_file->lang_encoding, "MacStandard") == 0)
    {
      encoding = "MACINTOSH";
    }
  else if (g_ascii_strcasecmp (ppd_file->lang_encoding, "WindowsANSI") == 0)
    {
      encoding = "WINDOWS-1252";
    }
  else 
    {
      /* Fallback, try iso-8859-1... */
      encoding = "ISO-8859-1";
    }

  res = g_convert (text, -1, "UTF-8", encoding, NULL, NULL, NULL);

  if (res == NULL)
    {
      g_warning ("unable to convert PPD text");
      res = g_strdup ("???");
    }
  
  return res;
}

/* TODO: Add more translations for common settings here */

static const struct {
  const char *keyword;
  const char *translation;
} cups_option_translations[] = {
  { "Duplex", N_("Two Sided") },
  { "MediaType", N_("Paper Type") },
  { "InputSlot", N_("Paper Source") },
  { "OutputBin", N_("Output Tray") },
};


static const struct {
  const char *keyword;
  const char *choice;
  const char *translation;
} cups_choice_translations[] = {
  { "Duplex", "None", N_("One Sided") },
  { "InputSlot", "Auto", N_("Auto Select") },
  { "InputSlot", "AutoSelect", N_("Auto Select") },
  { "InputSlot", "Default", N_("Printer Default") },
  { "InputSlot", "None", N_("Printer Default") },
  { "InputSlot", "PrinterDefault", N_("Printer Default") },
  { "InputSlot", "Unspecified", N_("Auto Select") },
};

static const struct {
  const char *ppd_keyword;
  const char *name;
} option_names[] = {
  {"Duplex", "gtk-duplex" },
  {"MediaType", "gtk-paper-type"},
  {"InputSlot", "gtk-paper-source"},
  {"OutputBin", "gtk-output-tray"},
};

/* keep sorted when changing */
static const char *color_option_whitelist[] = {
  "BRColorEnhancement",
  "BRColorMatching",
  "BRColorMatching",
  "BRColorMode",
  "BRGammaValue",
  "BRImprovedGray",
  "BlackSubstitution",
  "ColorModel",
  "HPCMYKInks",
  "HPCSGraphics",
  "HPCSImages",
  "HPCSText",
  "HPColorSmart",
  "RPSBlackMode",
  "RPSBlackOverPrint",
  "Rcmyksimulation",
};

/* keep sorted when changing */
static const char *color_group_whitelist[] = {
  "ColorPage",
  "FPColorWise1",
  "FPColorWise2",
  "FPColorWise3",
  "FPColorWise4",
  "FPColorWise5",
  "HPColorOptionsPanel",
};
  
/* keep sorted when changing */
static const char *image_quality_option_whitelist[] = {
  "BRDocument",
  "BRHalfTonePattern",
  "BRNormalPrt",
  "BRPrintQuality",
  "BitsPerPixel",
  "Darkness",
  "Dithering",
  "EconoMode",
  "Economode",
  "HPEconoMode",
  "HPEdgeControl",
  "HPGraphicsHalftone",
  "HPHalftone",
  "HPLJDensity",
  "HPPhotoHalftone",
  "OutputMode",
  "REt",
  "RPSBitsPerPixel",
  "RPSDitherType",
  "Resolution",
  "ScreenLock",
  "Smoothing",
  "TonerSaveMode",
  "UCRGCRForImage",
};

/* keep sorted when changing */
static const char *image_quality_group_whitelist[] = {
  "FPImageQuality1",
  "FPImageQuality2",
  "FPImageQuality3",
  "ImageQualityPage",
};

/* keep sorted when changing */
static const char * finishing_option_whitelist[] = {
  "BindColor",
  "BindEdge",
  "BindType",
  "BindWhen",
  "Booklet",
  "FoldType",
  "FoldWhen",
  "HPStaplerOptions",
  "Jog",
  "Slipsheet",
  "Sorter",
  "StapleLocation",
  "StapleOrientation",
  "StapleWhen",
  "StapleX",
  "StapleY",
};

/* keep sorted when changing */
static const char *finishing_group_whitelist[] = {
  "FPFinishing1",
  "FPFinishing2",
  "FPFinishing3",
  "FPFinishing4",
  "FinishingPage",
  "HPFinishingPanel",
};

/* keep sorted when changing */
static const char *cups_option_blacklist[] = {
  "Collate",
  "Copies", 
  "OutputOrder",
  "PageRegion",
  "PageSize",
};

static char *
get_option_text (ppd_file_t *ppd_file, ppd_option_t *option)
{
  int i;
  char *utf8;
  
  for (i = 0; i < G_N_ELEMENTS (cups_option_translations); i++)
    {
      if (strcmp (cups_option_translations[i].keyword, option->keyword) == 0)
	return g_strdup (_(cups_option_translations[i].translation));
    }

  utf8 = ppd_text_to_utf8 (ppd_file, option->text);

  /* Some ppd files have spaces in the text before the colon */
  g_strchomp (utf8);
  
  return utf8;
}

static char *
get_choice_text (ppd_file_t *ppd_file, ppd_choice_t *choice)
{
  int i;
  ppd_option_t *option = choice->option;
  const char *keyword = option->keyword;
  
  for (i = 0; i < G_N_ELEMENTS (cups_choice_translations); i++)
    {
      if (strcmp (cups_choice_translations[i].keyword, keyword) == 0 &&
	  strcmp (cups_choice_translations[i].choice, choice->choice) == 0)
	return g_strdup (_(cups_choice_translations[i].translation));
    }
  return ppd_text_to_utf8 (ppd_file, choice->text);
}

static gboolean
group_has_option (ppd_group_t *group, ppd_option_t *option)
{
  int i;

  if (group == NULL)
    return FALSE;
  
  if (group->num_options > 0 &&
      option >= group->options && option < group->options + group->num_options)
    return TRUE;
  
  for (i = 0; i < group->num_subgroups; i++)
    {
      if (group_has_option (&group->subgroups[i],option))
	return TRUE;
    }
  return FALSE;
}

static void
set_option_off (GtkPrinterOption *option)
{
  /* Any of these will do, _set only applies the value
   * if its allowed of the option */
  gtk_printer_option_set (option, "False");
  gtk_printer_option_set (option, "Off");
  gtk_printer_option_set (option, "None");
}

static gboolean
value_is_off (const char *value)
{
  return  (strcasecmp (value, "None") == 0 ||
	   strcasecmp (value, "Off") == 0 ||
	   strcasecmp (value, "False") == 0);
}

static int
available_choices (ppd_file_t *ppd,
		   ppd_option_t *option,
		   ppd_choice_t ***available,
		   gboolean keep_if_only_one_option)
{
  ppd_option_t *other_option;
  int i, j;
  char *conflicts;
  ppd_const_t *constraint;
  const char *choice, *other_choice;
  ppd_option_t *option1, *option2;
  ppd_group_t *installed_options;
  int num_conflicts;
  gboolean all_default;
  int add_auto;

  if (available)
    *available = NULL;

  conflicts = g_new0 (char, option->num_choices);

  installed_options = NULL;
  for (i = 0; i < ppd->num_groups; i++)
    {
      if (strcmp (ppd->groups[i].name, "InstallableOptions") == 0)
	{
	  installed_options = &ppd->groups[i];
	  break;
	}
    }

  for (i = ppd->num_consts, constraint = ppd->consts; i > 0; i--, constraint++)
    {
      option1 = ppdFindOption (ppd, constraint->option1);
      if (option1 == NULL)
	continue;

      option2 = ppdFindOption (ppd, constraint->option2);
      if (option2 == NULL)
	continue;

      if (option == option1)
	{
	  choice = constraint->choice1;
	  other_option = option2;
	  other_choice = constraint->choice2;
	}
      else if (option == option2)
	{
	  choice = constraint->choice2;
	  other_option = option1;
	  other_choice = constraint->choice1;
	}
      else
	continue;

      /* We only care of conflicts with installed_options and
         PageSize */
      if (!group_has_option (installed_options, other_option) &&
	  (strcmp (other_option->keyword, "PageSize") != 0))
	continue;

      if (*other_choice == 0)
	{
	  /* Conflict only if the installed option is not off */
	  if (value_is_off (other_option->defchoice))
	    continue;
	}
      /* Conflict if the installed option has the specified default */
      else if (strcasecmp (other_choice, other_option->defchoice) != 0)
	continue;

      if (*choice == 0)
	{
	  /* Conflict with all non-off choices */
	  for (j = 0; j < option->num_choices; j++)
	    {
	      if (!value_is_off (option->choices[j].choice))
		conflicts[j] = 1;
	    }
	}
      else
	{
	  for (j = 0; j < option->num_choices; j++)
	    {
	      if (strcasecmp (option->choices[j].choice, choice) == 0)
		conflicts[j] = 1;
	    }
	}
    }

  num_conflicts = 0;
  all_default = TRUE;
  for (j = 0; j < option->num_choices; j++)
    {
      if (conflicts[j])
	num_conflicts++;
      else if (strcmp (option->choices[j].choice, option->defchoice) != 0)
	all_default = FALSE;
    }

  if (all_default && !keep_if_only_one_option)
    return 0;
  
  if (num_conflicts == option->num_choices)
    return 0;


  /* Some ppds don't have a "use printer default" option for
     InputSlot. This means you always have to select a particular slot,
     and you can't auto-pick source based on the paper size. To support
     this we always add an auto option if there isn't one already. If
     the user chooses the generated option we don't send any InputSlot
     value when printing. The way we detect existing auto-cases is based
     on feedback from Michael Sweet of cups fame.
  */
  add_auto = 0;
  if (strcmp (option->keyword, "InputSlot") == 0)
    {
      gboolean found_auto = FALSE;
      for (j = 0; j < option->num_choices; j++)
	{
	  if (!conflicts[j])
	    {
	      if (strcmp (option->choices[j].choice, "Auto") == 0 ||
		  strcmp (option->choices[j].choice, "AutoSelect") == 0 ||
		  strcmp (option->choices[j].choice, "Default") == 0 ||
		  strcmp (option->choices[j].choice, "None") == 0 ||
		  strcmp (option->choices[j].choice, "PrinterDefault") == 0 ||
		  strcmp (option->choices[j].choice, "Unspecified") == 0 ||
		  option->choices[j].code == NULL ||
		  option->choices[j].code[0] == 0)
		{
		  found_auto = TRUE;
		  break;
		}
	    }
	}

      if (!found_auto)
	add_auto = 1;
    }
  
  if (available)
    {
      
      *available = g_new (ppd_choice_t *, option->num_choices - num_conflicts + add_auto);

      i = 0;
      for (j = 0; j < option->num_choices; j++)
	{
	  if (!conflicts[j])
	    (*available)[i++] = &option->choices[j];
	}

      if (add_auto) 
	(*available)[i++] = NULL;
    }
  
  return option->num_choices - num_conflicts + add_auto;
}

static GtkPrinterOption *
create_pickone_option (ppd_file_t *ppd_file,
		       ppd_option_t *ppd_option,
		       const char *gtk_name)
{
  GtkPrinterOption *option;
  ppd_choice_t **available;
  char *label;
  int n_choices;
  int i;

  g_assert (ppd_option->ui == PPD_UI_PICKONE);
  
  option = NULL;

  n_choices = available_choices (ppd_file, ppd_option, &available, g_str_has_prefix (gtk_name, "gtk-"));
  if (n_choices > 0)
    {
      label = get_option_text (ppd_file, ppd_option);
      option = gtk_printer_option_new (gtk_name, label,
				       GTK_PRINTER_OPTION_TYPE_PICKONE);
      g_free (label);
      
      gtk_printer_option_allocate_choices (option, n_choices);
      for (i = 0; i < n_choices; i++)
	{
	  if (available[i] == NULL)
	    {
	      /* This was auto-added */
	      option->choices[i] = g_strdup ("gtk-ignore-value");
	      option->choices_display[i] = g_strdup (_("Printer Default"));
	    }
	  else
	    {
	      option->choices[i] = g_strdup (available[i]->choice);
	      option->choices_display[i] = get_choice_text (ppd_file, available[i]);
	    }
	}
      gtk_printer_option_set (option, ppd_option->defchoice);
    }
#ifdef PRINT_IGNORED_OPTIONS
  else
    g_warning ("Ignoring pickone %s\n", ppd_option->text);
#endif
  g_free (available);

  return option;
}

static GtkPrinterOption *
create_boolean_option (ppd_file_t *ppd_file,
		       ppd_option_t *ppd_option,
		       const char *gtk_name)
{
  GtkPrinterOption *option;
  ppd_choice_t **available;
  char *label;
  int n_choices;

  g_assert (ppd_option->ui == PPD_UI_BOOLEAN);
  
  option = NULL;

  n_choices = available_choices (ppd_file, ppd_option, &available, g_str_has_prefix (gtk_name, "gtk-"));
  if (n_choices == 2)
    {
      label = get_option_text (ppd_file, ppd_option);
      option = gtk_printer_option_new (gtk_name, label,
					       GTK_PRINTER_OPTION_TYPE_BOOLEAN);
      g_free (label);
      
      gtk_printer_option_allocate_choices (option, 2);
      option->choices[0] = g_strdup ("True");
      option->choices_display[0] = g_strdup ("True");
      option->choices[1] = g_strdup ("True");
      option->choices_display[1] = g_strdup ("True");
      
      gtk_printer_option_set (option, ppd_option->defchoice);
    }
#ifdef PRINT_IGNORED_OPTIONS
  else
    g_warning ("Ignoring boolean %s\n", ppd_option->text);
#endif
  g_free (available);

  return option;
}

static char *
get_option_name (const char *keyword)
{
  int i;

  for (i = 0; i < G_N_ELEMENTS (option_names); i++)
    if (strcmp (option_names[i].ppd_keyword, keyword) == 0)
      return g_strdup (option_names[i].name);

  return g_strdup_printf ("cups-%s", keyword);
}

static int
strptr_cmp (const void *a, const void *b)
{
  char **aa = (char **)a;
  char **bb = (char **)b;
  return strcmp (*aa, *bb);
}


static gboolean
string_in_table (char *str, const char *table[], int table_len)
{
  return bsearch (&str, table, table_len, sizeof (char *), (void *)strptr_cmp) != NULL;
}

#define STRING_IN_TABLE(_str, _table) (string_in_table (_str, _table, G_N_ELEMENTS (_table)))

static void
handle_option (GtkPrinterOptionSet *set,
	       ppd_file_t *ppd_file,
	       ppd_option_t *ppd_option,
	       ppd_group_t *toplevel_group,
	       GtkPrintSettings *settings)
{
  GtkPrinterOption *option;
  char *name;

  if (STRING_IN_TABLE (ppd_option->keyword, cups_option_blacklist))
    return;
  
  name = get_option_name (ppd_option->keyword);

  option = NULL;
  if (ppd_option->ui == PPD_UI_PICKONE)
    {
      option = create_pickone_option (ppd_file, ppd_option, name);
    }
  else if (ppd_option->ui == PPD_UI_BOOLEAN)
    {
      option = create_boolean_option (ppd_file, ppd_option, name);
    }
  else
    g_warning ("Ignored pickmany setting %s\n", ppd_option->text);
  
  
  if (option)
    {
      if (STRING_IN_TABLE (toplevel_group->name,
			   color_group_whitelist) ||
	  STRING_IN_TABLE (ppd_option->keyword,
			   color_option_whitelist))
	{
	  option->group = g_strdup ("ColorPage");
	}
      else if (STRING_IN_TABLE (toplevel_group->name,
				image_quality_group_whitelist) ||
	       STRING_IN_TABLE (ppd_option->keyword,
				image_quality_option_whitelist))
	{
	  option->group = g_strdup ("ImageQualityPage");
	}
      else if (STRING_IN_TABLE (toplevel_group->name,
				finishing_group_whitelist) ||
	       STRING_IN_TABLE (ppd_option->keyword,
				finishing_option_whitelist))
	{
	  option->group = g_strdup ("FinishingPage");
	}
      else
	{
	  option->group = g_strdup (toplevel_group->text);
	}

      set_option_from_settings (option, settings);
      
      gtk_printer_option_set_add (set, option);
    }
  
  g_free (name);
}

static void
handle_group (GtkPrinterOptionSet *set,
	      ppd_file_t *ppd_file,
	      ppd_group_t *group,
	      ppd_group_t *toplevel_group,
	      GtkPrintSettings *settings)
{
  int i;

  /* Ignore installable options */
  if (strcmp (toplevel_group->name, "InstallableOptions") == 0)
    return;
  
  for (i = 0; i < group->num_options; i++)
    handle_option (set, ppd_file, &group->options[i], toplevel_group, settings);

  for (i = 0; i < group->num_subgroups; i++)
    handle_group (set, ppd_file, &group->subgroups[i], toplevel_group, settings);

}

static GtkPrinterOptionSet *
cups_printer_get_options (GtkPrinter *printer,
			  GtkPrintSettings                  *settings,
			  GtkPageSetup                      *page_setup)
{
  GtkPrinterOptionSet *set;
  GtkPrinterOption *option;
  ppd_file_t *ppd_file;
  int i;
  char *print_at[] = { "now", "at", "on-hold" };
  char *n_up[] = {"1", "2", "4", "6", "9", "16" };
  char *prio[] = {"100", "80", "50", "30" };
  char *prio_display[] = {N_("Urgent"), N_("High"), N_("Medium"), N_("Low") };
  char *cover[] = {"none", "classified", "confidential", "secret", "standard", "topsecret", "unclassified" };
  char *cover_display[] = {N_("None"), N_("Classified"), N_("Confidential"), N_("Secret"), N_("Standard"), N_("Top Secret"), N_("Unclassified"),};


  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);
  gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (n_up),
					 n_up, n_up);
  gtk_printer_option_set (option, "1");
  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);
  gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (prio),
					 prio, prio_display);
  gtk_printer_option_set (option, "50");
  set_option_from_settings (option, settings);
  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);
  gtk_printer_option_set (option, "");
  set_option_from_settings (option, settings);
  gtk_printer_option_set_add (set, option);
  g_object_unref (option);

  for (i = 0; i < G_N_ELEMENTS(cover_display); i++)
    cover_display[i] = _(cover_display[i]);
  
  option = gtk_printer_option_new ("gtk-cover-before", "Before", GTK_PRINTER_OPTION_TYPE_PICKONE);
  gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (cover),
					 cover, cover_display);
  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);
  gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (cover),
					 cover, cover_display);
  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-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");
  set_option_from_settings (option, settings);
  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);
  gtk_printer_option_set (option, "");
  set_option_from_settings (option, settings);
  gtk_printer_option_set_add (set, option);
  g_object_unref (option);
  
  /* Printer (ppd) specific settings */
  ppd_file = gtk_printer_cups_get_ppd (GTK_PRINTER_CUPS (printer));
  if (ppd_file)
    {
      GtkPaperSize *paper_size;
      ppd_option_t *option;
      
      ppdMarkDefaults (ppd_file);

      paper_size = gtk_page_setup_get_paper_size (page_setup);

      option = ppdFindOption(ppd_file, "PageSize");
      strncpy (option->defchoice, gtk_paper_size_get_ppd_name (paper_size),
	       PPD_MAX_NAME);

      for (i = 0; i < ppd_file->num_groups; i++)
        handle_group (set, ppd_file, &ppd_file->groups[i], &ppd_file->groups[i], settings);
    }

  return set;
}


static void
mark_option_from_set (GtkPrinterOptionSet *set,
		      ppd_file_t *ppd_file,
		      ppd_option_t *ppd_option)
{
  GtkPrinterOption *option;
  char *name = get_option_name (ppd_option->keyword);

  option = gtk_printer_option_set_lookup (set, name);

  if (option)
    ppdMarkOption (ppd_file, ppd_option->keyword, option->value);
  
  g_free (name);
}


static void
mark_group_from_set (GtkPrinterOptionSet *set,
		     ppd_file_t *ppd_file,
		     ppd_group_t *group)
{
  int i;

  for (i = 0; i < group->num_options; i++)
    mark_option_from_set (set, ppd_file, &group->options[i]);

  for (i = 0; i < group->num_subgroups; i++)
    mark_group_from_set (set, ppd_file, &group->subgroups[i]);
}

static void
set_conflicts_from_option (GtkPrinterOptionSet *set,
			   ppd_file_t *ppd_file,
			   ppd_option_t *ppd_option)
{
  GtkPrinterOption *option;
  char *name;
  if (ppd_option->conflicted)
    {
      name = get_option_name (ppd_option->keyword);
      option = gtk_printer_option_set_lookup (set, name);

      if (option)
	gtk_printer_option_set_has_conflict (option, TRUE);
      else
	g_warning ("conflict for option %s ignored", ppd_option->keyword);
      
      g_free (name);
    }
}

static void
set_conflicts_from_group (GtkPrinterOptionSet *set,
			  ppd_file_t *ppd_file,
			  ppd_group_t *group)
{
  int i;

  for (i = 0; i < group->num_options; i++)
    set_conflicts_from_option (set, ppd_file, &group->options[i]);

  for (i = 0; i < group->num_subgroups; i++)
    set_conflicts_from_group (set, ppd_file, &group->subgroups[i]);
}

static gboolean
cups_printer_mark_conflicts  (GtkPrinter          *printer,
			      GtkPrinterOptionSet *options)
{
  ppd_file_t *ppd_file;
  int num_conflicts;
  int i;
 
  ppd_file = gtk_printer_cups_get_ppd (GTK_PRINTER_CUPS (printer));

  if (ppd_file == NULL)
    return FALSE;

  ppdMarkDefaults (ppd_file);

  for (i = 0; i < ppd_file->num_groups; i++)
    mark_group_from_set (options, ppd_file, &ppd_file->groups[i]);

  num_conflicts = ppdConflicts (ppd_file);

  if (num_conflicts > 0)
    {
      for (i = 0; i < ppd_file->num_groups; i++)
	set_conflicts_from_group (options, ppd_file, &ppd_file->groups[i]);
    }
 
  return num_conflicts > 0;
}

struct OptionData {
  GtkPrinter *printer;
  GtkPrinterOptionSet *options;
  GtkPrintSettings *settings;
  ppd_file_t *ppd_file;
};

typedef struct {
  const char *cups;
  const char *standard;
} NameMapping;

static void
map_settings_to_option (GtkPrinterOption *option,
			const NameMapping table[],
			int n_elements,
			GtkPrintSettings *settings,
			const char *standard_name,
			const char *cups_name)
{
  int i;
  char *name;
  const char *cups_value;
  const char *standard_value;

  /* If the cups-specific setting is set, always use that */

  name = g_strdup_printf ("cups-%s", cups_name);
  cups_value = gtk_print_settings_get (settings, name);
  g_free (name);
  
  if (cups_value != NULL) {
    gtk_printer_option_set (option, cups_value);
    return;
  }

  /* Otherwise we try to convert from the general setting */
  standard_value = gtk_print_settings_get (settings, standard_name);
  if (standard_value == NULL)
    return;

  for (i = 0; i < n_elements; i++)
    {
      if (table[i].cups == NULL && table[i].standard == NULL)
	{
	  gtk_printer_option_set (option, standard_value);
	  break;
	}
      else if (table[i].cups == NULL &&
	       strcmp (table[i].standard, standard_value) == 0)
	{
	  set_option_off (option);
	  break;
	}
      else if (strcmp (table[i].standard, standard_value) == 0)
	{
	  gtk_printer_option_set (option, table[i].cups);
	  break;
	}
    }
}

static void
map_option_to_settings (const char *value,
			const NameMapping table[],
			int n_elements,
			GtkPrintSettings *settings,
			const char *standard_name,
			const char *cups_name)
{
  int i;
  char *name;

  for (i = 0; i < n_elements; i++)
    {
      if (table[i].cups == NULL && table[i].standard == NULL)
	{
	  gtk_print_settings_set (settings,
				  standard_name,
				  value);
	  break;
	}
      else if (table[i].cups == NULL && table[i].standard != NULL)
	{
	  if (value_is_off (value))
	    {
	      gtk_print_settings_set (settings,
				      standard_name,
				      table[i].standard);
	      break;
	    }
	}
      else if (strcmp (table[i].cups, value) == 0)
	{
	  gtk_print_settings_set (settings,
				  standard_name,
				  table[i].standard);
	  break;
	}
    }

  /* Always set the corresponding cups-specific setting */
  name = g_strdup_printf ("cups-%s", cups_name);
  gtk_print_settings_set (settings, name, value);
  g_free (name);
}


static const NameMapping paper_source_map[] = {
  { "Lower", "lower"},
  { "Middle", "middle"},
  { "Upper", "upper"},
  { "Rear", "rear"},
  { "Envelope", "envelope"},
  { "Cassette", "cassette"},
  { "LargeCapacity", "large-capacity"},
  { "AnySmallFormat", "small-format"},
  { "AnyLargeFormat", "large-format"},
  { NULL, NULL}
};

static const NameMapping output_tray_map[] = {
  { "Upper", "upper"},
  { "Lower", "lower"},
  { "Rear", "rear"},
  { NULL, NULL}
};

static const NameMapping duplex_map[] = {
  { "DuplexTumble", "vertical" },
  { "DuplexNoTumble", "horizontal" },
  { NULL, "simplex" }
};

static const NameMapping output_mode_map[] = {
  { "Standard", "normal" },
  { "Normal", "normal" },
  { "Draft", "draft" },
  { "Fast", "draft" },
};

static const NameMapping media_type_map[] = {
  { "Transparency", "transparency"},
  { "Standard", "stationery"},
  { NULL, NULL}
};

static const NameMapping all_map[] = {
  { NULL, NULL}
};


static void
set_option_from_settings (GtkPrinterOption *option,
			  GtkPrintSettings *settings)
{
  const char *cups_value;
  char *value;
  
  if (settings == NULL)
    return;

  if (strcmp (option->name, "gtk-paper-source") == 0)
    map_settings_to_option (option, paper_source_map, G_N_ELEMENTS (paper_source_map),
			     settings, GTK_PRINT_SETTINGS_DEFAULT_SOURCE, "InputSlot");
  else if (strcmp (option->name, "gtk-output-tray") == 0)
    map_settings_to_option (option, output_tray_map, G_N_ELEMENTS (output_tray_map),
			    settings, GTK_PRINT_SETTINGS_OUTPUT_BIN, "OutputBin");
  else if (strcmp (option->name, "gtk-duplex") == 0)
    map_settings_to_option (option, duplex_map, G_N_ELEMENTS (duplex_map),
			    settings, GTK_PRINT_SETTINGS_DUPLEX, "Duplex");
  else if (strcmp (option->name, "cups-OutputMode") == 0)
    map_settings_to_option (option, output_mode_map, G_N_ELEMENTS (output_mode_map),
			    settings, GTK_PRINT_SETTINGS_QUALITY, "OutputMode");
  else if (strcmp (option->name, "cups-Resolution") == 0)
    {
      cups_value = gtk_print_settings_get (settings, option->name);
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
      else
	{
	  int res = gtk_print_settings_get_resolution (settings);
	  if (res != 0)
	    {
	      value = g_strdup_printf ("%ddpi", res);
	      gtk_printer_option_set (option, value);
	      g_free (value);
	    }
	}
    }
  else if (strcmp (option->name, "gtk-paper-type") == 0)
    map_settings_to_option (option, media_type_map, G_N_ELEMENTS (media_type_map),
			    settings, GTK_PRINT_SETTINGS_MEDIA_TYPE, "MediaType");
  else if (strcmp (option->name, "gtk-n-up") == 0)
    {
      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-billing-info") == 0)
    {
      cups_value = gtk_print_settings_get (settings, "cups-job-billing");
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
  else if (strcmp (option->name, "gtk-job-prio") == 0)
    {
      cups_value = gtk_print_settings_get (settings, "cups-job-priority");
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
  else if (strcmp (option->name, "gtk-cover-before") == 0)
    {
      cups_value = gtk_print_settings_get (settings, "cover-before");
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
  else if (strcmp (option->name, "gtk-cover-after") == 0)
    {
      cups_value = gtk_print_settings_get (settings, "cover-after");
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
  else if (strcmp (option->name, "gtk-print-time") == 0)
    {
      cups_value = gtk_print_settings_get (settings, "print-at");
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
  else if (strcmp (option->name, "gtk-print-time-text") == 0)
    {
      cups_value = gtk_print_settings_get (settings, "print-at-time");
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
  else if (g_str_has_prefix (option->name, "cups-"))
    {
      cups_value = gtk_print_settings_get (settings, option->name);
      if (cups_value)
	gtk_printer_option_set (option, cups_value);
    } 
}

static void
foreach_option_get_settings (GtkPrinterOption  *option,
			     gpointer          user_data)
{
  struct OptionData *data = user_data;
  GtkPrintSettings *settings = data->settings;
  const char *value;

  value = option->value;

  if (strcmp (option->name, "gtk-paper-source") == 0)
    map_option_to_settings (value, paper_source_map, G_N_ELEMENTS (paper_source_map),
			    settings, GTK_PRINT_SETTINGS_DEFAULT_SOURCE, "InputSlot");
  else if (strcmp (option->name, "gtk-output-tray") == 0)
    map_option_to_settings (value, output_tray_map, G_N_ELEMENTS (output_tray_map),
			    settings, GTK_PRINT_SETTINGS_OUTPUT_BIN, "OutputBin");
  else if (strcmp (option->name, "gtk-duplex") == 0)
    map_option_to_settings (value, duplex_map, G_N_ELEMENTS (duplex_map),
			    settings, GTK_PRINT_SETTINGS_DUPLEX, "Duplex");
  else if (strcmp (option->name, "cups-OutputMode") == 0)
    map_option_to_settings (value, output_mode_map, G_N_ELEMENTS (output_mode_map),
			    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);
      gtk_print_settings_set (settings, option->name, value);
    }
  else if (strcmp (option->name, "gtk-paper-type") == 0)
    map_option_to_settings (value, media_type_map, G_N_ELEMENTS (media_type_map),
			    settings, GTK_PRINT_SETTINGS_MEDIA_TYPE, "MediaType");
  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-billing-info") == 0 && strlen (value) > 0)
    gtk_print_settings_set (settings, "cups-job-billing", value);
  else if (strcmp (option->name, "gtk-job-prio") == 0)
    gtk_print_settings_set (settings, "cups-job-priority", value);
  else if (strcmp (option->name, "gtk-cover-before") == 0)
    gtk_print_settings_set (settings, "cover-before", value);
  else if (strcmp (option->name, "gtk-cover-after") == 0)
    gtk_print_settings_set (settings, "cover-after", value);
  else if (strcmp (option->name, "gtk-print-time") == 0)
    gtk_print_settings_set (settings, "print-at", value);
  else if (strcmp (option->name, "gtk-print-time-text") == 0)
    gtk_print_settings_set (settings, "print-at-time", value);
  else if (g_str_has_prefix (option->name, "cups-"))
    gtk_print_settings_set (settings, option->name, value);
}

static void
cups_printer_get_settings_from_options (GtkPrinter *printer,
					GtkPrinterOptionSet *options,
					GtkPrintSettings *settings)
{
  struct OptionData data;
  const char *print_at, *print_at_time;

  data.printer = printer;
  data.options = options;
  data.settings = settings;
  data.ppd_file = gtk_printer_cups_get_ppd (GTK_PRINTER_CUPS (printer));
 
  if (data.ppd_file != NULL)
    {
      GtkPrinterOption *cover_before, *cover_after;
      
      gtk_printer_option_set_foreach (options, foreach_option_get_settings, &data);

      cover_before = gtk_printer_option_set_lookup (options, "gtk-cover-before");
      cover_after = gtk_printer_option_set_lookup (options, "gtk-cover-after");
      if (cover_before && cover_after)
	{
	  char *value = g_strdup_printf ("%s,%s", cover_before->value, cover_after->value);
	  gtk_print_settings_set (settings, "cups-job-sheets", value);
	  g_free (value);
	}

      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);
      else if (strcmp (print_at, "on-hold") == 0)
	gtk_print_settings_set (settings, "cups-job-hold-until", "indefinite");
    }
}

static void
cups_printer_prepare_for_print (GtkPrinter *printer,
				GtkPrintJob *print_job,
				GtkPrintSettings *settings,
				GtkPageSetup *page_setup)
{
  GtkPageSet page_set;
  GtkPaperSize *paper_size;
  const char *ppd_paper_name;
  double scale;

  print_job->print_pages = gtk_print_settings_get_print_pages (settings);
  print_job->page_ranges = NULL;
  print_job->num_page_ranges = 0;
  
  if (print_job->print_pages == GTK_PRINT_PAGES_RANGES)
    print_job->page_ranges =
      gtk_print_settings_get_page_ranges (settings,
					  &print_job->num_page_ranges);
  
  if (gtk_print_settings_get_collate (settings))
    gtk_print_settings_set (settings, "cups-Collate", "True");
  print_job->collate = FALSE;

  if (gtk_print_settings_get_reverse (settings))
    gtk_print_settings_set (settings, "cups-OutputOrder", "Reverse");
  print_job->reverse = FALSE;

  if (gtk_print_settings_get_n_copies (settings) > 1)
    gtk_print_settings_set_int (settings, "cups-copies",
				gtk_print_settings_get_n_copies (settings));
  print_job->num_copies = 1;

  scale = gtk_print_settings_get_scale (settings);
  print_job->scale = 1.0;
  if (scale != 100.0)
    print_job->scale = scale/100.0;

  page_set = gtk_print_settings_get_page_set (settings);
  if (page_set == GTK_PAGE_SET_EVEN)
    gtk_print_settings_set (settings, "cups-page-set", "even");
  else if (page_set == GTK_PAGE_SET_ODD)
    gtk_print_settings_set (settings, "cups-page-set", "odd");
  print_job->page_set = GTK_PAGE_SET_ALL;

  paper_size = gtk_page_setup_get_paper_size (page_setup);
  ppd_paper_name = gtk_paper_size_get_ppd_name (paper_size);
  if (ppd_paper_name != NULL)
    gtk_print_settings_set (settings, "cups-PageSize", ppd_paper_name);
  else
    {
      char *custom_name = g_strdup_printf ("Custom.%2fx%.2f",
					   gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS),
					   gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS));
      gtk_print_settings_set (settings, "cups-PageSize", custom_name);
      g_free (custom_name);
    }

  print_job->rotate_to_orientation = TRUE;
}

static GList *
cups_printer_list_papers (GtkPrinter *printer)
{
  ppd_file_t *ppd_file;
  ppd_size_t *size;
  char *display_name;
  GtkPageSetup *page_setup;
  GtkPaperSize *paper_size;
  ppd_option_t *option;
  ppd_choice_t *choice;
  GList *l;
  int i;

  ppd_file = gtk_printer_cups_get_ppd (GTK_PRINTER_CUPS (printer));
  if (ppd_file == NULL)
    return NULL;

  l = NULL;
  
  for (i = 0; i < ppd_file->num_sizes; i++)
    {
      size = &ppd_file->sizes[i];

      display_name = NULL;
      option = ppdFindOption(ppd_file, "PageSize");
      if (option)
	{
	  choice = ppdFindChoice(option, size->name);
	  if (choice)
	    display_name = ppd_text_to_utf8 (ppd_file, choice->text);
	}
      if (display_name == NULL)
	display_name = g_strdup (size->name);

      page_setup = gtk_page_setup_new ();
      paper_size = gtk_paper_size_new_from_ppd (size->name,
						display_name,
						size->width,
						size->length);
      gtk_page_setup_set_paper_size (page_setup, paper_size);
      gtk_paper_size_free (paper_size);

      gtk_page_setup_set_top_margin (page_setup, size->length - size->top, GTK_UNIT_POINTS);
      gtk_page_setup_set_bottom_margin (page_setup, size->bottom, GTK_UNIT_POINTS);
      gtk_page_setup_set_left_margin (page_setup, size->left, GTK_UNIT_POINTS);
      gtk_page_setup_set_right_margin (page_setup, size->width - size->right, GTK_UNIT_POINTS);
	
      g_free (display_name);

      l = g_list_prepend (l, page_setup);
    }

  return g_list_reverse (l);
}

static void
cups_printer_get_hard_margins (GtkPrinter *printer,
			       double     *top,
			       double     *bottom,
			       double     *left,
			       double     *right)
{
  ppd_file_t *ppd_file;

  ppd_file = gtk_printer_cups_get_ppd (GTK_PRINTER_CUPS (printer));
  if (ppd_file == NULL)
    return;

  *left = ppd_file->custom_margins[0];
  *bottom = ppd_file->custom_margins[1];
  *right = ppd_file->custom_margins[2];
  *top = ppd_file->custom_margins[3];
}