gimp/libgimpconfig/gimpconfig-deserialize.c

/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * Object properties deserialization routines
 * Copyright (C) 2001  Sven Neumann <sven@gimp.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <stdio.h>
#include <string.h>

#include <glib-object.h>

#include "gimpconfig.h"
#include "gimpconfig-deserialize.h"


static void  gimp_config_deserialize_property (GimpConfig *config,
                                               GScanner   *scanner,
                                               GTokenType *token);


gboolean
gimp_config_deserialize_properties (GimpConfig *config,
                                    GScanner   *scanner)
{
  GimpConfigClass  *klass;
  GParamSpec      **property_specs;
  guint             n_property_specs;
  guint             i;
  guint             scope_id;
  guint             old_scope_id;
  GTokenType	    token;
      
  g_return_val_if_fail (GIMP_IS_CONFIG (config), FALSE);

  klass = GIMP_CONFIG_GET_CLASS (config);
  property_specs = g_object_class_list_properties (G_OBJECT_CLASS (klass),
                                                   &n_property_specs);

  g_return_val_if_fail (property_specs != NULL && n_property_specs > 0, FALSE);

  scope_id = GPOINTER_TO_UINT (config);
  old_scope_id = g_scanner_set_scope (scanner, scope_id);

  for (i = 0; i < n_property_specs; i++)
    {
      GParamSpec *prop_spec = property_specs[i];

      if (prop_spec->flags & G_PARAM_READWRITE &&
          g_type_is_a (prop_spec->owner_type, GIMP_TYPE_CONFIG))
        {
          g_scanner_scope_add_symbol (scanner, scope_id, 
                                      prop_spec->name, prop_spec);
        }
    }

  token = G_TOKEN_LEFT_PAREN;
  
  do
    {
      if (g_scanner_peek_next_token (scanner) != token)
        break;

      token = g_scanner_get_next_token (scanner);
      
      switch (token)
        {
        case G_TOKEN_LEFT_PAREN:
          token = G_TOKEN_SYMBOL;
          break;
          
        case G_TOKEN_SYMBOL:
          gimp_config_deserialize_property (config, scanner, &token);
          break;

        case G_TOKEN_RIGHT_PAREN:
          token = G_TOKEN_LEFT_PAREN;
          break;

        default: /* do nothing */
          break;
        }
    }
  while (token != G_TOKEN_EOF);

  if (token != G_TOKEN_LEFT_PAREN)
    {
      g_scanner_get_next_token (scanner);
      g_scanner_unexp_token (scanner, token, NULL, NULL, NULL,
                             "parse error", TRUE);
    }

  g_scanner_set_scope (scanner, old_scope_id);
  if (property_specs)
    g_free (property_specs);

  return (token == G_TOKEN_EOF);
}

static void
gimp_config_deserialize_property (GimpConfig *config,
                                  GScanner   *scanner,
                                  GTokenType *token)
{
  GParamSpec *prop_spec;
  GValue      value = { 0, };

  prop_spec = G_PARAM_SPEC (scanner->value.v_symbol);  
  g_value_init (&value, prop_spec->value_type);

  switch (G_TYPE_FUNDAMENTAL (G_VALUE_TYPE (&value)))
    {
    case G_TYPE_STRING:
      *token = G_TOKEN_STRING;
      break;

    case G_TYPE_BOOLEAN:
    case G_TYPE_ENUM:
      *token = G_TOKEN_IDENTIFIER;
      break;

    case G_TYPE_INT:
    case G_TYPE_UINT:
    case G_TYPE_LONG:
    case G_TYPE_ULONG:
      *token = G_TOKEN_INT;
      break;

    case G_TYPE_FLOAT:
    case G_TYPE_DOUBLE:
      *token = G_TOKEN_FLOAT;
      break;

    default:
      g_assert_not_reached ();
      break;
    }

  if (g_scanner_peek_next_token (scanner) != *token)
    return;

  g_scanner_get_next_token (scanner);

  switch (G_TYPE_FUNDAMENTAL (G_VALUE_TYPE (&value)))
    {
    case G_TYPE_STRING:
      g_value_set_string (&value, scanner->value.v_string);
      break;

    case G_TYPE_BOOLEAN:
      if (g_ascii_strcasecmp (scanner->value.v_identifier, "true") == 0)
        g_value_set_boolean (&value, TRUE);
      else if (g_ascii_strcasecmp (scanner->value.v_identifier, "false") == 0)
        g_value_set_boolean (&value, FALSE);
      else
        g_scanner_warn 
          (scanner, 
           "expected 'true' or 'false' for boolean property %s, got '%s'", 
           prop_spec->name, scanner->value.v_identifier);
      break;

    case G_TYPE_ENUM:
      {
	GEnumClass *enum_class;
	GEnumValue *enum_value;

	enum_class = g_type_class_peek (G_VALUE_TYPE (&value));
	enum_value = g_enum_get_value_by_name (G_ENUM_CLASS (enum_class), 
					       scanner->value.v_identifier);
        if (enum_value)
          g_value_set_enum (&value, enum_value->value);
        else
          g_scanner_warn (scanner, 
                          "invalid value '%s' for enum property %s", 
                          scanner->value.v_identifier, prop_spec->name);
      }
      break;

    case G_TYPE_INT:
      g_value_set_int (&value, scanner->value.v_int);
      break;
    case G_TYPE_UINT:
      g_value_set_uint (&value, scanner->value.v_int);
      break;
    case G_TYPE_LONG:
      g_value_set_int (&value, scanner->value.v_int);
      break;
    case G_TYPE_ULONG:
      g_value_set_uint (&value, scanner->value.v_int);
      break;
      
    case G_TYPE_FLOAT:
      g_value_set_float (&value, scanner->value.v_float);
      break;
    case G_TYPE_DOUBLE:
      g_value_set_double (&value, scanner->value.v_float);
      break;

    default:
      g_assert_not_reached ();
    }

  g_object_set_property (G_OBJECT (config), prop_spec->name, &value);
  g_value_unset (&value);
  
  *token = G_TOKEN_RIGHT_PAREN;        
}