Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1019 insertions, 0 deletions

diff --git a/libgimpconfig/gimpconfig-deserialize.c b/libgimpconfig/gimpconfig-deserialize.c
new file mode 100644
index 0000000..55cbf50
--- /dev/null
+++ b/libgimpconfig/gimpconfig-deserialize.c
@@ -0,0 +1,1019 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * Object properties deserialization routines
+ * Copyright (C) 2001-2002  Sven Neumann <sven@gimp.org>
+ *
+ * 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 3 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
+ * Library 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, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpconfigtypes.h"
+
+#include "gimpconfigwriter.h"
+#include "gimpconfig-iface.h"
+#include "gimpconfig-deserialize.h"
+#include "gimpconfig-params.h"
+#include "gimpconfig-path.h"
+#include "gimpscanner.h"
+
+#include "libgimp/libgimp-intl.h"
+
+
+/**
+ * SECTION: gimpconfig-deserialize
+ * @title: GimpConfig-deserialize
+ * @short_description: Deserializing code for libgimpconfig.
+ *
+ * Deserializing code for libgimpconfig.
+ **/
+
+
+/*
+ *  All functions return G_TOKEN_RIGHT_PAREN on success,
+ *  the GTokenType they would have expected but didn't get
+ *  or G_TOKEN_NONE if they got the expected token but
+ *  couldn't parse it.
+ */
+
+static GTokenType  gimp_config_deserialize_value       (GValue     *value,
+                                                        GimpConfig *config,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_fundamental (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_enum        (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_memsize     (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_path        (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_rgb         (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_matrix2     (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_object      (GValue     *value,
+                                                        GimpConfig *config,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner,
+                                                        gint        nest_level);
+static GTokenType  gimp_config_deserialize_value_array (GValue     *value,
+                                                        GimpConfig *config,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_unit        (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_file_value  (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_deserialize_any         (GValue     *value,
+                                                        GParamSpec *prop_spec,
+                                                        GScanner   *scanner);
+static GTokenType  gimp_config_skip_unknown_property   (GScanner   *scanner);
+
+static inline gboolean  scanner_string_utf8_valid (GScanner    *scanner,
+                                                   const gchar *token_name);
+
+static inline gboolean
+scanner_string_utf8_valid (GScanner    *scanner,
+                           const gchar *token_name)
+{
+  if (g_utf8_validate (scanner->value.v_string, -1, NULL))
+    return TRUE;
+
+  g_scanner_error (scanner,
+                   _("value for token %s is not a valid UTF-8 string"),
+                   token_name);
+
+  return FALSE;
+}
+
+/**
+ * gimp_config_deserialize_properties:
+ * @config: a #GimpConfig.
+ * @scanner: a #GScanner.
+ * @nest_level: the nest level
+ *
+ * This function uses the @scanner to configure the properties of @config.
+ *
+ * Return value: %TRUE on success, %FALSE otherwise.
+ *
+ * Since: 2.4
+ **/
+gboolean
+gimp_config_deserialize_properties (GimpConfig *config,
+                                    GScanner   *scanner,
+                                    gint        nest_level)
+{
+  GObjectClass  *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 = G_OBJECT_GET_CLASS (config);
+  property_specs = g_object_class_list_properties (klass, &n_property_specs);
+
+  if (! property_specs)
+    return TRUE;
+
+  scope_id = g_type_qname (G_TYPE_FROM_INSTANCE (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 & GIMP_CONFIG_PARAM_SERIALIZE)
+        {
+          g_scanner_scope_add_symbol (scanner, scope_id,
+                                      prop_spec->name, prop_spec);
+        }
+    }
+
+  g_free (property_specs);
+
+  g_object_freeze_notify (G_OBJECT (config));
+
+  token = G_TOKEN_LEFT_PAREN;
+
+  while (TRUE)
+    {
+      GTokenType next = g_scanner_peek_next_token (scanner);
+
+      if (next == G_TOKEN_EOF)
+        break;
+
+      if (G_UNLIKELY (next != token &&
+                      ! (token == G_TOKEN_SYMBOL &&
+                         next  == G_TOKEN_IDENTIFIER)))
+        {
+          break;
+        }
+
+      token = g_scanner_get_next_token (scanner);
+
+      switch (token)
+        {
+        case G_TOKEN_LEFT_PAREN:
+          token = G_TOKEN_SYMBOL;
+          break;
+
+        case G_TOKEN_IDENTIFIER:
+          token = gimp_config_skip_unknown_property (scanner);
+          break;
+
+        case G_TOKEN_SYMBOL:
+          token = gimp_config_deserialize_property (config,
+                                                    scanner, nest_level);
+          break;
+
+        case G_TOKEN_RIGHT_PAREN:
+          token = G_TOKEN_LEFT_PAREN;
+          break;
+
+        default: /* do nothing */
+          break;
+        }
+    }
+
+  g_scanner_set_scope (scanner, old_scope_id);
+
+  g_object_thaw_notify (G_OBJECT (config));
+
+  if (token == G_TOKEN_NONE)
+    return FALSE;
+
+  return gimp_config_deserialize_return (scanner, token, nest_level);
+}
+
+/**
+ * gimp_config_deserialize_property:
+ * @config: a #GimpConfig.
+ * @scanner: a #GScanner.
+ * @nest_level: the nest level
+ *
+ * This function deserializes a single property of @config. You
+ * shouldn't need to call this function directly. If possible, use
+ * gimp_config_deserialize_properties() instead.
+ *
+ * Return value: %G_TOKEN_RIGHT_PAREN on success, otherwise the
+ * expected #GTokenType or %G_TOKEN_NONE if the expected token was
+ * found but couldn't be parsed.
+ *
+ * Since: 2.4
+ **/
+GTokenType
+gimp_config_deserialize_property (GimpConfig *config,
+                                  GScanner   *scanner,
+                                  gint        nest_level)
+{
+  GimpConfigInterface *config_iface = NULL;
+  GimpConfigInterface *parent_iface = NULL;
+  GParamSpec          *prop_spec;
+  GTokenType           token        = G_TOKEN_RIGHT_PAREN;
+  GValue               value        = G_VALUE_INIT;
+  guint                old_scope_id;
+
+  old_scope_id = g_scanner_set_scope (scanner, 0);
+
+  prop_spec = G_PARAM_SPEC (scanner->value.v_symbol);
+
+  g_value_init (&value, prop_spec->value_type);
+
+  if (G_TYPE_IS_OBJECT (prop_spec->owner_type))
+    {
+      GTypeClass *owner_class = g_type_class_peek (prop_spec->owner_type);
+
+      config_iface = g_type_interface_peek (owner_class, GIMP_TYPE_CONFIG);
+
+      /*  We must call deserialize_property() *only* if the *exact* class
+       *  which implements it is param_spec->owner_type's class.
+       *
+       *  Therefore, we ask param_spec->owner_type's immediate parent class
+       *  for it's GimpConfigInterface and check if we get a different
+       *  pointer.
+       *
+       *  (if the pointers are the same, param_spec->owner_type's
+       *   GimpConfigInterface is inherited from one of it's parent classes
+       *   and thus not able to handle param_spec->owner_type's properties).
+       */
+      if (config_iface)
+        {
+          GTypeClass *owner_parent_class;
+
+          owner_parent_class = g_type_class_peek_parent (owner_class);
+
+          parent_iface = g_type_interface_peek (owner_parent_class,
+                                                GIMP_TYPE_CONFIG);
+        }
+    }
+
+  if (config_iface                       &&
+      config_iface != parent_iface       && /* see comment above */
+      config_iface->deserialize_property &&
+      config_iface->deserialize_property (config,
+                                          prop_spec->param_id,
+                                          &value,
+                                          prop_spec,
+                                          scanner,
+                                          &token))
+    {
+      /* nop */
+    }
+  else
+    {
+      if (G_VALUE_HOLDS_OBJECT (&value) &&
+          G_VALUE_TYPE (&value) != G_TYPE_FILE)
+        {
+          token = gimp_config_deserialize_object (&value,
+                                                  config, prop_spec,
+                                                  scanner, nest_level);
+        }
+      else
+        {
+          token = gimp_config_deserialize_value (&value,
+                                                 config, prop_spec, scanner);
+        }
+    }
+
+  if (token == G_TOKEN_RIGHT_PAREN &&
+      g_scanner_peek_next_token (scanner) == token)
+    {
+      if (! (G_VALUE_HOLDS_OBJECT (&value) &&
+             (prop_spec->flags & GIMP_CONFIG_PARAM_AGGREGATE)))
+        g_object_set_property (G_OBJECT (config), prop_spec->name, &value);
+    }
+#ifdef CONFIG_DEBUG
+  else
+    {
+      g_warning ("%s: couldn't deserialize property %s::%s of type %s",
+                 G_STRFUNC,
+                 g_type_name (G_TYPE_FROM_INSTANCE (config)),
+                 prop_spec->name,
+                 g_type_name (prop_spec->value_type));
+    }
+#endif
+
+  g_value_unset (&value);
+
+  g_scanner_set_scope (scanner, old_scope_id);
+
+  return token;
+}
+
+static GTokenType
+gimp_config_deserialize_value (GValue     *value,
+                               GimpConfig *config,
+                               GParamSpec *prop_spec,
+                               GScanner   *scanner)
+{
+  if (G_TYPE_FUNDAMENTAL (prop_spec->value_type) == G_TYPE_ENUM)
+    {
+      return gimp_config_deserialize_enum (value, prop_spec, scanner);
+    }
+  else if (G_TYPE_IS_FUNDAMENTAL (prop_spec->value_type))
+    {
+      return gimp_config_deserialize_fundamental (value, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == GIMP_TYPE_MEMSIZE)
+    {
+      return gimp_config_deserialize_memsize (value, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == GIMP_TYPE_CONFIG_PATH)
+    {
+      return  gimp_config_deserialize_path (value, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == GIMP_TYPE_RGB)
+    {
+      return gimp_config_deserialize_rgb (value, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == GIMP_TYPE_MATRIX2)
+    {
+      return gimp_config_deserialize_matrix2 (value, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == GIMP_TYPE_VALUE_ARRAY)
+    {
+      return gimp_config_deserialize_value_array (value,
+                                                  config, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == GIMP_TYPE_UNIT)
+    {
+      return gimp_config_deserialize_unit (value, prop_spec, scanner);
+    }
+  else if (prop_spec->value_type == G_TYPE_FILE)
+    {
+      return gimp_config_deserialize_file_value (value, prop_spec, scanner);
+    }
+
+  /*  This fallback will only work for value_types that
+   *  can be transformed from a string value.
+   */
+  return gimp_config_deserialize_any (value, prop_spec, scanner);
+}
+
+static GTokenType
+gimp_config_deserialize_fundamental (GValue     *value,
+                                     GParamSpec *prop_spec,
+                                     GScanner   *scanner)
+{
+  GTokenType token;
+  GTokenType next_token;
+  GType      value_type;
+  gboolean   negate = FALSE;
+
+  value_type = G_TYPE_FUNDAMENTAL (prop_spec->value_type);
+
+  switch (value_type)
+    {
+    case G_TYPE_STRING:
+      token = G_TOKEN_STRING;
+      break;
+
+    case G_TYPE_BOOLEAN:
+      token = G_TOKEN_IDENTIFIER;
+      break;
+
+    case G_TYPE_INT:
+    case G_TYPE_LONG:
+    case G_TYPE_INT64:
+      if (g_scanner_peek_next_token (scanner) == '-')
+        {
+          negate = TRUE;
+          g_scanner_get_next_token (scanner);
+        }
+      /*  fallthrough  */
+    case G_TYPE_UINT:
+    case G_TYPE_ULONG:
+    case G_TYPE_UINT64:
+      token = G_TOKEN_INT;
+      break;
+
+    case G_TYPE_FLOAT:
+    case G_TYPE_DOUBLE:
+      if (g_scanner_peek_next_token (scanner) == '-')
+        {
+          negate = TRUE;
+          g_scanner_get_next_token (scanner);
+        }
+      token = G_TOKEN_FLOAT;
+      break;
+
+    default:
+      g_assert_not_reached ();
+      break;
+    }
+
+  next_token = g_scanner_peek_next_token (scanner);
+
+  /* we parse integers into floats too, because g_ascii_dtostr()
+   * serialized whole number without decimal point
+   */
+  if (next_token != token &&
+      ! (token == G_TOKEN_FLOAT && next_token == G_TOKEN_INT))
+    {
+      return token;
+    }
+
+  g_scanner_get_next_token (scanner);
+
+  switch (value_type)
+    {
+    case G_TYPE_STRING:
+      if (scanner_string_utf8_valid (scanner, prop_spec->name))
+        g_value_set_string (value, scanner->value.v_string);
+      else
+        return G_TOKEN_NONE;
+      break;
+
+    case G_TYPE_BOOLEAN:
+      if (! g_ascii_strcasecmp (scanner->value.v_identifier, "yes") ||
+          ! g_ascii_strcasecmp (scanner->value.v_identifier, "true"))
+        g_value_set_boolean (value, TRUE);
+      else if (! g_ascii_strcasecmp (scanner->value.v_identifier, "no") ||
+               ! g_ascii_strcasecmp (scanner->value.v_identifier, "false"))
+        g_value_set_boolean (value, FALSE);
+      else
+        {
+          g_scanner_error
+            (scanner,
+             /* please don't translate 'yes' and 'no' */
+             _("expected 'yes' or 'no' for boolean token %s, got '%s'"),
+             prop_spec->name, scanner->value.v_identifier);
+          return G_TOKEN_NONE;
+        }
+      break;
+
+    case G_TYPE_INT:
+      g_value_set_int (value, (negate ?
+                               - (gint) scanner->value.v_int64 :
+                                 (gint) scanner->value.v_int64));
+      break;
+    case G_TYPE_UINT:
+      g_value_set_uint (value, scanner->value.v_int64);
+      break;
+
+    case G_TYPE_LONG:
+      g_value_set_long (value, (negate ?
+                                - (glong) scanner->value.v_int64 :
+                                  (glong) scanner->value.v_int64));
+      break;
+    case G_TYPE_ULONG:
+      g_value_set_ulong (value, scanner->value.v_int64);
+      break;
+
+    case G_TYPE_INT64:
+      g_value_set_int64 (value, (negate ?
+                                 - (gint64) scanner->value.v_int64 :
+                                   (gint64) scanner->value.v_int64));
+      break;
+    case G_TYPE_UINT64:
+      g_value_set_uint64 (value, scanner->value.v_int64);
+      break;
+
+    case G_TYPE_FLOAT:
+      if (next_token == G_TOKEN_FLOAT)
+        g_value_set_float (value, negate ?
+                           - scanner->value.v_float :
+                             scanner->value.v_float);
+      else
+        g_value_set_float (value, negate ?
+                           - (gfloat) scanner->value.v_int :
+                             (gfloat) scanner->value.v_int);
+      break;
+
+    case G_TYPE_DOUBLE:
+      if (next_token == G_TOKEN_FLOAT)
+        g_value_set_double (value, negate ?
+                            - scanner->value.v_float:
+                              scanner->value.v_float);
+      else
+        g_value_set_double (value, negate ?
+                            - (gdouble) scanner->value.v_int:
+                              (gdouble) scanner->value.v_int);
+      break;
+
+    default:
+      g_assert_not_reached ();
+      break;
+    }
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_enum (GValue     *value,
+                              GParamSpec *prop_spec,
+                              GScanner   *scanner)
+{
+  GEnumClass *enum_class;
+  GEnumValue *enum_value;
+
+  enum_class = g_type_class_peek (G_VALUE_TYPE (value));
+
+  switch (g_scanner_peek_next_token (scanner))
+    {
+    case G_TOKEN_IDENTIFIER:
+      g_scanner_get_next_token (scanner);
+
+      enum_value = g_enum_get_value_by_nick (enum_class,
+                                             scanner->value.v_identifier);
+      if (! enum_value)
+        enum_value = g_enum_get_value_by_name (enum_class,
+                                               scanner->value.v_identifier);
+      if (! enum_value)
+        {
+          /*  if the value was not found, check if we have a compat
+           *  enum to find the ideitifier
+           */
+          GQuark quark       = g_quark_from_static_string ("gimp-compat-enum");
+          GType  compat_type = (GType) g_type_get_qdata (G_VALUE_TYPE (value),
+                                                         quark);
+
+          if (compat_type)
+            {
+              GEnumClass *compat_class = g_type_class_ref (compat_type);
+
+              enum_value = g_enum_get_value_by_nick (compat_class,
+                                                     scanner->value.v_identifier);
+              if (! enum_value)
+                enum_value = g_enum_get_value_by_name (compat_class,
+                                                       scanner->value.v_identifier);
+
+              /*  finally, if we found a compat value, make sure the
+               *  same value exists in the original enum
+               */
+              if (enum_value)
+                enum_value = g_enum_get_value (enum_class, enum_value->value);
+
+              g_type_class_unref (compat_class);
+           }
+        }
+
+      if (! enum_value)
+        {
+          g_scanner_error (scanner,
+                           _("invalid value '%s' for token %s"),
+                           scanner->value.v_identifier, prop_spec->name);
+          return G_TOKEN_NONE;
+        }
+      break;
+
+    case G_TOKEN_INT:
+      g_scanner_get_next_token (scanner);
+
+      enum_value = g_enum_get_value (enum_class,
+                                     (gint) scanner->value.v_int64);
+
+      if (! enum_value)
+        {
+          g_scanner_error (scanner,
+                           _("invalid value '%ld' for token %s"),
+                           (glong) scanner->value.v_int64, prop_spec->name);
+          return G_TOKEN_NONE;
+        }
+      break;
+
+    default:
+      return G_TOKEN_IDENTIFIER;
+    }
+
+  g_value_set_enum (value, enum_value->value);
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_memsize (GValue     *value,
+                                 GParamSpec *prop_spec,
+                                 GScanner   *scanner)
+{
+  gchar   *orig_cset_first = scanner->config->cset_identifier_first;
+  gchar   *orig_cset_nth   = scanner->config->cset_identifier_nth;
+  guint64  memsize;
+
+  scanner->config->cset_identifier_first = G_CSET_DIGITS;
+  scanner->config->cset_identifier_nth   = G_CSET_DIGITS "gGmMkKbB";
+
+  if (g_scanner_peek_next_token (scanner) != G_TOKEN_IDENTIFIER)
+    return G_TOKEN_IDENTIFIER;
+
+  g_scanner_get_next_token (scanner);
+
+  scanner->config->cset_identifier_first = orig_cset_first;
+  scanner->config->cset_identifier_nth   = orig_cset_nth;
+
+  if (! gimp_memsize_deserialize (scanner->value.v_identifier, &memsize))
+    return G_TOKEN_NONE;
+
+  g_value_set_uint64 (value, memsize);
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_path (GValue     *value,
+                              GParamSpec *prop_spec,
+                              GScanner   *scanner)
+{
+  GError *error = NULL;
+
+  if (g_scanner_peek_next_token (scanner) != G_TOKEN_STRING)
+    return G_TOKEN_STRING;
+
+  g_scanner_get_next_token (scanner);
+
+  if (!scanner_string_utf8_valid (scanner, prop_spec->name))
+    return G_TOKEN_NONE;
+
+  if (scanner->value.v_string)
+    {
+      /*  Check if the string can be expanded
+       *  and converted to the filesystem encoding.
+       */
+      gchar *expand = gimp_config_path_expand (scanner->value.v_string,
+                                               TRUE, &error);
+
+      if (!expand)
+        {
+          g_scanner_error (scanner,
+                           _("while parsing token '%s': %s"),
+                           prop_spec->name, error->message);
+          g_error_free (error);
+
+          return G_TOKEN_NONE;
+        }
+
+      g_free (expand);
+
+      g_value_set_static_string (value, scanner->value.v_string);
+    }
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_rgb (GValue     *value,
+                             GParamSpec *prop_spec,
+                             GScanner   *scanner)
+{
+  GimpRGB rgb;
+
+  if (! gimp_scanner_parse_color (scanner, &rgb))
+    return G_TOKEN_NONE;
+
+  g_value_set_boxed (value, &rgb);
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_matrix2 (GValue     *value,
+                                 GParamSpec *prop_spec,
+                                 GScanner   *scanner)
+{
+  GimpMatrix2 matrix;
+
+  if (! gimp_scanner_parse_matrix2 (scanner, &matrix))
+    return G_TOKEN_NONE;
+
+  g_value_set_boxed (value, &matrix);
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_object (GValue     *value,
+                                GimpConfig *config,
+                                GParamSpec *prop_spec,
+                                GScanner   *scanner,
+                                gint        nest_level)
+{
+  GimpConfigInterface *config_iface;
+  GimpConfig          *prop_object;
+
+  g_object_get_property (G_OBJECT (config), prop_spec->name, value);
+
+  prop_object = g_value_get_object (value);
+
+  if (! prop_object)
+    {
+      /*  if the object property is not GIMP_CONFIG_PARAM_AGGREGATE, read
+       *  the type of the object and create it
+       */
+      if (! (prop_spec->flags & GIMP_CONFIG_PARAM_AGGREGATE))
+        {
+          gchar *type_name;
+          GType  type;
+
+          if (! gimp_scanner_parse_string (scanner, &type_name))
+            return G_TOKEN_STRING;
+
+          if (! (type_name && *type_name))
+            {
+              g_scanner_error (scanner, "Type name is empty");
+              g_free (type_name);
+              return G_TOKEN_NONE;
+            }
+
+          type = g_type_from_name (type_name);
+          g_free (type_name);
+
+          if (! g_type_is_a (type, prop_spec->value_type))
+            return G_TOKEN_STRING;
+
+          prop_object = g_object_new (type, NULL);
+
+          g_value_take_object (value, prop_object);
+        }
+      else
+        {
+          return G_TOKEN_RIGHT_PAREN;
+        }
+    }
+
+  config_iface = GIMP_CONFIG_GET_INTERFACE (prop_object);
+
+  if (! config_iface)
+    return gimp_config_deserialize_any (value, prop_spec, scanner);
+
+  if (! config_iface->deserialize (prop_object, scanner, nest_level + 1, NULL))
+    return G_TOKEN_NONE;
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_value_array (GValue     *value,
+                                     GimpConfig *config,
+                                     GParamSpec *prop_spec,
+                                     GScanner   *scanner)
+{
+  GimpParamSpecValueArray *array_spec;
+  GimpValueArray          *array;
+  GValue                   array_value = G_VALUE_INIT;
+  gint                     n_values;
+  GTokenType               token;
+  gint                     i;
+
+  array_spec = GIMP_PARAM_SPEC_VALUE_ARRAY (prop_spec);
+
+  if (! gimp_scanner_parse_int (scanner, &n_values))
+    return G_TOKEN_INT;
+
+  array = gimp_value_array_new (n_values);
+
+  for (i = 0; i < n_values; i++)
+    {
+      g_value_init (&array_value, array_spec->element_spec->value_type);
+
+      token = gimp_config_deserialize_value (&array_value,
+                                             config,
+                                             array_spec->element_spec,
+                                             scanner);
+
+      if (token == G_TOKEN_RIGHT_PAREN)
+        gimp_value_array_append (array, &array_value);
+
+      g_value_unset (&array_value);
+
+      if (token != G_TOKEN_RIGHT_PAREN)
+        return token;
+    }
+
+  g_value_take_boxed (value, array);
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+/* This function is entirely sick, so is our method of serializing
+ * units, which we write out as (unit foo bar) instead of
+ * (unit "foo bar"). The assumption that caused this shit was that a
+ * unit's "identifier" is really an identifier in the C-ish sense,
+ * when in fact it's just a random user entered string.
+ *
+ * Here, we try to parse at least the default units shipped with gimp,
+ * and we add code to parse (unit "foo bar") in order to be compatible
+ * with future correct unit serializing.
+ */
+static GTokenType
+gimp_config_deserialize_unit (GValue     *value,
+                              GParamSpec *prop_spec,
+                              GScanner   *scanner)
+{
+  gchar      *old_cset_skip_characters;
+  gchar      *old_cset_identifier_first;
+  gchar      *old_cset_identifier_nth;
+  GString    *buffer;
+  GValue      src = G_VALUE_INIT;
+  GTokenType  token;
+
+  /* parse the next token *before* reconfiguring the scanner, so it
+   * skips whitespace first
+   */
+  token = g_scanner_peek_next_token (scanner);
+
+  if (token == G_TOKEN_STRING)
+    return gimp_config_deserialize_any (value, prop_spec, scanner);
+
+  old_cset_skip_characters  = scanner->config->cset_skip_characters;
+  old_cset_identifier_first = scanner->config->cset_identifier_first;
+  old_cset_identifier_nth   = scanner->config->cset_identifier_nth;
+
+  scanner->config->cset_skip_characters  = "";
+  scanner->config->cset_identifier_first = ( G_CSET_a_2_z G_CSET_A_2_Z "." );
+  scanner->config->cset_identifier_nth   = ( G_CSET_a_2_z G_CSET_A_2_Z
+                                             G_CSET_DIGITS "-_." );
+
+  buffer = g_string_new ("");
+
+  while (g_scanner_peek_next_token (scanner) != G_TOKEN_RIGHT_PAREN)
+    {
+      token = g_scanner_peek_next_token (scanner);
+
+      if (token == G_TOKEN_IDENTIFIER)
+        {
+          g_scanner_get_next_token (scanner);
+          g_string_append (buffer, scanner->value.v_identifier);
+        }
+      else if (token == G_TOKEN_CHAR)
+        {
+          g_scanner_get_next_token (scanner);
+          g_string_append_c (buffer, scanner->value.v_char);
+        }
+      else if (token == ' ')
+        {
+          g_scanner_get_next_token (scanner);
+          g_string_append_c (buffer, token);
+        }
+      else
+        {
+          token = G_TOKEN_IDENTIFIER;
+          goto cleanup;
+        }
+    }
+
+  g_value_init (&src, G_TYPE_STRING);
+  g_value_set_static_string (&src, buffer->str);
+  g_value_transform (&src, value);
+  g_value_unset (&src);
+
+  token = G_TOKEN_RIGHT_PAREN;
+
+ cleanup:
+
+  g_string_free (buffer, TRUE);
+
+  scanner->config->cset_skip_characters  = old_cset_skip_characters;
+  scanner->config->cset_identifier_first = old_cset_identifier_first;
+  scanner->config->cset_identifier_nth   = old_cset_identifier_nth;
+
+  return token;
+}
+
+static GTokenType
+gimp_config_deserialize_file_value (GValue     *value,
+                                    GParamSpec *prop_spec,
+                                    GScanner   *scanner)
+{
+  GTokenType token;
+
+  token = g_scanner_peek_next_token (scanner);
+
+  if (token != G_TOKEN_IDENTIFIER &&
+      token != G_TOKEN_STRING)
+    {
+      return G_TOKEN_STRING;
+    }
+
+  g_scanner_get_next_token (scanner);
+
+  if (token == G_TOKEN_IDENTIFIER)
+    {
+      /* this is supposed to parse a literal "NULL" only, but so what... */
+      g_value_set_object (value, NULL);
+    }
+  else
+    {
+      gchar *path = gimp_config_path_expand (scanner->value.v_string, TRUE,
+                                             NULL);
+
+      if (path)
+        {
+          GFile *file = g_file_new_for_path (path);
+
+          g_value_take_object (value, file);
+          g_free (path);
+        }
+      else
+        {
+          g_value_set_object (value, NULL);
+        }
+    }
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_deserialize_any (GValue     *value,
+                             GParamSpec *prop_spec,
+                             GScanner   *scanner)
+{
+  GValue     src = G_VALUE_INIT;
+  GTokenType token;
+
+  if (!g_value_type_transformable (G_TYPE_STRING, prop_spec->value_type))
+    {
+      g_warning ("%s: %s can not be transformed from a string",
+                 G_STRFUNC, g_type_name (prop_spec->value_type));
+      return G_TOKEN_NONE;
+    }
+
+  token = g_scanner_peek_next_token (scanner);
+
+  if (token != G_TOKEN_IDENTIFIER &&
+      token != G_TOKEN_STRING)
+    {
+      return G_TOKEN_IDENTIFIER;
+    }
+
+  g_scanner_get_next_token (scanner);
+
+  g_value_init (&src, G_TYPE_STRING);
+
+  if (token == G_TOKEN_IDENTIFIER)
+    g_value_set_static_string (&src, scanner->value.v_identifier);
+  else
+    g_value_set_static_string (&src, scanner->value.v_string);
+
+  g_value_transform (&src, value);
+  g_value_unset (&src);
+
+  return G_TOKEN_RIGHT_PAREN;
+}
+
+static GTokenType
+gimp_config_skip_unknown_property (GScanner *scanner)
+{
+  gint open_paren = 0;
+
+  while (TRUE)
+    {
+      GTokenType token = g_scanner_peek_next_token (scanner);
+
+      switch (token)
+        {
+        case G_TOKEN_LEFT_PAREN:
+          open_paren++;
+          g_scanner_get_next_token (scanner);
+          break;
+
+        case G_TOKEN_RIGHT_PAREN:
+          if (open_paren == 0)
+            return token;
+
+          open_paren--;
+          g_scanner_get_next_token (scanner);
+          break;
+
+        case G_TOKEN_EOF:
+          return token;
+
+        default:
+          g_scanner_get_next_token (scanner);
+          break;
+        }
+    }
+}