gtkprintbackendtest.c

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

  OutputFormat format;

  format = format_from_settings (settings);

  if (format == FORMAT_PS)
    surface = cairo_ps_surface_create_for_stream (_cairo_write, cache_io, width, height);
  else
    surface = cairo_pdf_surface_create_for_stream (_cairo_write, cache_io, width, height);

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

  return surface;
}

typedef struct {
  GtkPrintBackend *backend;
  GtkPrintJobCompleteFunc callback;
  GtkPrintJob *job;
  GIOChannel *target_io;
  gpointer user_data;
  GDestroyNotify dnotify;
} _PrintStreamData;

static void
test_print_cb (GtkPrintBackendTest *print_backend,
               GError              *error,
               gpointer            user_data)
{
  _PrintStreamData *ps = (_PrintStreamData *) user_data;

  if (ps->target_io != NULL)
    g_io_channel_unref (ps->target_io);

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

  if (ps->dnotify)
    ps->dnotify (ps->user_data);

  gtk_print_job_set_status (ps->job,
			    (error != NULL)?GTK_PRINT_STATUS_FINISHED_ABORTED:GTK_PRINT_STATUS_FINISHED);

  if (ps->job)
    g_object_unref (ps->job);
 
  g_free (ps);
}

static gboolean
test_write (GIOChannel   *source,
            GIOCondition  con,
            gpointer      user_data)
{
  gchar buf[_STREAM_MAX_CHUNK_SIZE];
  gsize bytes_read;
  GError *error;
  GIOStatus read_status;
  _PrintStreamData *ps = (_PrintStreamData *) user_data;

  error = NULL;

  read_status = 
    g_io_channel_read_chars (source,
                             buf,
                             _STREAM_MAX_CHUNK_SIZE,
                             &bytes_read,
                             &error);

  if (read_status != G_IO_STATUS_ERROR)
    {
      gsize bytes_written;

      g_io_channel_write_chars (ps->target_io, 
                                buf, 
				bytes_read, 
				&bytes_written, 
				&error);
    }

  if (error != NULL || read_status == G_IO_STATUS_EOF)
    {
      test_print_cb (GTK_PRINT_BACKEND_TEST (ps->backend), error, user_data);

      if (error != NULL)
        {
          GTK_NOTE (PRINTING,
                    g_print ("TEST Backend: %s\n", error->message));

          g_error_free (error);
        }

      return FALSE;
    }

  GTK_NOTE (PRINTING,
            g_print ("TEST Backend: Writing %i byte chunk to target test\n", (int)bytes_read));

  return TRUE;
}

static void
gtk_print_backend_test_print_stream (GtkPrintBackend        *print_backend,
				     GtkPrintJob            *job,
				     GIOChannel             *data_io,
				     GtkPrintJobCompleteFunc callback,
				     gpointer                user_data,
				     GDestroyNotify          dnotify)
{
  GError *internal_error = NULL;
  GtkPrinter *printer;
  _PrintStreamData *ps;
  GtkPrintSettings *settings;
  gchar *uri, *testname;

  printer = gtk_print_job_get_printer (job);
  settings = gtk_print_job_get_settings (job);

  ps = g_new0 (_PrintStreamData, 1);
  ps->callback = callback;
  ps->user_data = user_data;
  ps->dnotify = dnotify;
  ps->job = g_object_ref (job);
  ps->backend = print_backend;

  internal_error = NULL;
  uri = output_test_from_settings (settings, NULL);
  testname = g_filename_from_uri (uri, NULL, &internal_error);
  g_free (uri);

  if (testname == NULL)
    goto error;

  ps->target_io = g_io_channel_new_file (testname, "w", &internal_error);

  g_free (testname);

  if (internal_error == NULL)
    g_io_channel_set_encoding (ps->target_io, NULL, &internal_error);

error:
  if (internal_error != NULL)
    {
      test_print_cb (GTK_PRINT_BACKEND_TEST (print_backend),
                    internal_error, ps);

      g_error_free (internal_error);
      return;
    }

  g_io_add_watch (data_io, 
                  G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
                  (GIOFunc) test_write,
                  ps);
}

static void
gtk_print_backend_test_init (GtkPrintBackendTest *backend)
{
  GtkPrinter *printer;
  int i;

  /* make 100 of these printers */
  for (i = 0; i < 100; i++)
    {
      char *name;
 
      name = g_strdup_printf ("%s %i", _("Print to Test Printer"), i);
      printer = g_object_new (GTK_TYPE_PRINTER,
			      "name", name,
			      "backend", backend,
			      "is-virtual", FALSE, /* treat printer like a real one*/
			      NULL); 
      g_free (name);

      g_message ("TEST Backend: Adding printer %d\n", i);

      gtk_printer_set_has_details (printer, FALSE);
      gtk_printer_set_icon_name (printer, "gtk-delete"); /* use a delete icon just for fun */
      gtk_printer_set_is_active (printer, TRUE);

      gtk_print_backend_add_printer (GTK_PRINT_BACKEND (backend), printer);
      g_object_unref (printer);
    }

  gtk_print_backend_set_list_done (GTK_PRINT_BACKEND (backend));
}

static GtkPrinterOptionSet *
test_printer_get_options (GtkPrinter           *printer,
			  GtkPrintSettings     *settings,
			  GtkPageSetup         *page_setup,
			  GtkPrintCapabilities  capabilities)
{
  GtkPrinterOptionSet *set;
  GtkPrinterOption *option;
  const gchar *n_up[] = { "1" };
  OutputFormat format;

  format = format_from_settings (settings);

  set = gtk_printer_option_set_new ();

  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),
					 (char **) n_up, (char **) n_up /* FIXME i18n (localised digits)! */);
  gtk_printer_option_set (option, "1");
  gtk_printer_option_set_add (set, option);
  g_object_unref (option);

  return set;
}

static void
test_printer_get_settings_from_options (GtkPrinter          *printer,
					GtkPrinterOptionSet *options,
					GtkPrintSettings    *settings)
{
}

static void
test_printer_prepare_for_print (GtkPrinter       *printer,
				GtkPrintJob      *print_job,
				GtkPrintSettings *settings,
				GtkPageSetup     *page_setup)
{
  gdouble 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);
  
  print_job->collate = gtk_print_settings_get_collate (settings);
  print_job->reverse = gtk_print_settings_get_reverse (settings);
  print_job->num_copies = gtk_print_settings_get_n_copies (settings);

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

  print_job->page_set = gtk_print_settings_get_page_set (settings);
  print_job->rotate_to_orientation = TRUE;
}

static gboolean
test_printer_details_aquired_cb (GtkPrinter *printer)
{
  gboolean success;
  gint weight;

  /* weight towards success */
  weight = g_random_int_range (0, 100);

  success = FALSE;
  if (weight < 75)
    success = TRUE;

  g_message ("success %i", success);
  gtk_printer_set_has_details (printer, success);
  g_signal_emit_by_name (printer, "details-acquired", success);

  return FALSE;
}

static void
test_printer_request_details (GtkPrinter *printer)
{
  gint weight;
  gint time;
  /* set the timer to succeed or fail at a random time interval */
  /* weight towards the shorter end */
  weight = g_random_int_range (0, 100);
  if (weight < 50)
    time = g_random_int_range (0, 2);
  else if (weight < 75)
    time = g_random_int_range (1, 5);
  else
    time = g_random_int_range (1, 10);

  g_message ("Gathering details in %i seconds", time);

  if (time == 0)
    time = 10;
  else
    time *= 1000;

  g_timeout_add (time, (GSourceFunc) test_printer_details_aquired_cb, printer);
}