gtkprintbackendcups.c

This GTK+ version 2.12.3. GTK+ is a multi-platform toolkit for creating graphical user interfaces.

      httpClose (http);
      g_free (ppd_filename);
      g_free (data);

      g_signal_emit_by_name (printer, "details-acquired", FALSE);
      return;
    }
    
  data->http = http;
  fchmod (fd, S_IRUSR | S_IWUSR);
  data->ppd_io = g_io_channel_unix_new (fd);
  g_io_channel_set_encoding (data->ppd_io, NULL, NULL);
  g_io_channel_set_close_on_unref (data->ppd_io, TRUE);

  data->printer = g_object_ref (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);

  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);
}


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)
{
  GtkCupsRequest *request;
  const char *str;

  if ((str = g_getenv ("LPDEST")) != NULL)
    {
      print_backend->default_printer = g_strdup (str);
      print_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;
      return;
    }
  
  request = gtk_cups_request_new (NULL,
                                  GTK_CUPS_POST,
                                  CUPS_GET_DEFAULT,
				  NULL,
				  NULL,
				  NULL);
  
  cups_request_execute (print_backend,
                        request,
                        (GtkPrintCupsResponseCallbackFunc) cups_request_default_printer_cb,
		        g_object_ref (print_backend),
		        g_object_unref);
}

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)
    {
      GTK_NOTE (PRINTING,
                g_warning ("CUPS Backend: Unable to convert PPD text\n"));
      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 char *
ppd_group_name (ppd_group_t *group)
{
#if CUPS_VERSION_MAJOR > 1 || (CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR > 1) || (CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR == 1 && CUPS_VERSION_PATCH >= 18) 
  return group->name;
#else
  return group->text;
#endif
}

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;
  gchar *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++)
    {
      char *name; 

      name = ppd_group_name (&ppd->groups[i]);
      if (strcmp (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;