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gimp/libgimpconfig/gimpconfig-serialize.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* Object properties serialization routines
* Copyright (C) 2001-2002 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 <glib-object.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "gimpconfigtypes.h"
#include "gimpconfigwriter.h"
#include "gimpconfig-iface.h"
#include "gimpconfig-params.h"
#include "gimpconfig-serialize.h"
#include "gimpconfig-utils.h"
static gboolean gimp_config_serialize_rgb (const GValue *value,
GString *str,
gboolean has_alpha);
/**
* gimp_config_serialize_properties:
* @config: a #GimpConfig.
* @writer: a #GimpConfigWriter.
*
* This function writes all object properties to the @writer.
*
* Returns: %TRUE if serialization succeeded, %FALSE otherwise
*
* Since: GIMP 2.4
**/
gboolean
gimp_config_serialize_properties (GimpConfig *config,
GimpConfigWriter *writer)
{
GObjectClass *klass;
GParamSpec **property_specs;
guint n_property_specs;
guint i;
g_return_val_if_fail (G_IS_OBJECT (config), FALSE);
klass = G_OBJECT_GET_CLASS (config);
property_specs = g_object_class_list_properties (klass, &n_property_specs);
if (! property_specs)
return TRUE;
for (i = 0; i < n_property_specs; i++)
{
GParamSpec *prop_spec = property_specs[i];
if (! (prop_spec->flags & GIMP_CONFIG_PARAM_SERIALIZE))
continue;
if (! gimp_config_serialize_property (config, prop_spec, writer))
return FALSE;
}
g_free (property_specs);
return TRUE;
}
/**
* gimp_config_serialize_changed_properties:
* @config: a #GimpConfig.
* @writer: a #GimpConfigWriter.
*
* This function writes all object properties that have been changed from
* their default values to the @writer.
*
* Returns: %TRUE if serialization succeeded, %FALSE otherwise
*
* Since: GIMP 2.4
**/
gboolean
gimp_config_serialize_changed_properties (GimpConfig *config,
GimpConfigWriter *writer)
{
GObjectClass *klass;
GParamSpec **property_specs;
guint n_property_specs;
guint i;
GValue value = { 0, };
g_return_val_if_fail (G_IS_OBJECT (config), FALSE);
klass = G_OBJECT_GET_CLASS (config);
property_specs = g_object_class_list_properties (klass, &n_property_specs);
if (! property_specs)
return TRUE;
for (i = 0; i < n_property_specs; i++)
{
GParamSpec *prop_spec = property_specs[i];
if (! (prop_spec->flags & GIMP_CONFIG_PARAM_SERIALIZE))
continue;
g_value_init (&value, prop_spec->value_type);
g_object_get_property (G_OBJECT (config), prop_spec->name, &value);
if (! g_param_value_defaults (prop_spec, &value))
{
if (! gimp_config_serialize_property (config, prop_spec, writer))
return FALSE;
}
g_value_unset (&value);
}
g_free (property_specs);
return TRUE;
}
/**
* gimp_config_serialize_properties:
* @config: a #GimpConfig.
* @writer: a #GimpConfigWriter.
*
* This function serializes a single object property to the @writer.
*
* Returns: %TRUE if serialization succeeded, %FALSE otherwise
*
* Since: GIMP 2.4
**/
gboolean
gimp_config_serialize_property (GimpConfig *config,
GParamSpec *param_spec,
GimpConfigWriter *writer)
{
GTypeClass *owner_class;
GimpConfigInterface *config_iface;
GimpConfigInterface *parent_iface = NULL;
GValue value = { 0, };
gboolean success = FALSE;
if (! (param_spec->flags & GIMP_CONFIG_PARAM_SERIALIZE))
return FALSE;
if (param_spec->flags & GIMP_CONFIG_PARAM_IGNORE)
return TRUE;
g_value_init (&value, param_spec->value_type);
g_object_get_property (G_OBJECT (config), param_spec->name, &value);
if (param_spec->flags & GIMP_CONFIG_PARAM_DEFAULTS &&
g_param_value_defaults (param_spec, &value))
{
g_value_unset (&value);
return TRUE;
}
owner_class = g_type_class_peek (param_spec->owner_type);
config_iface = g_type_interface_peek (owner_class, GIMP_TYPE_CONFIG);
/* We must call serialize_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->serialize_property &&
config_iface->serialize_property (config,
param_spec->param_id,
(const GValue *) &value,
param_spec,
writer))
{
success = TRUE;
}
/* If there is no serialize_property() method *or* if it returned
* FALSE, continue with the default implementation
*/
if (! success)
{
if (G_VALUE_HOLDS_OBJECT (&value))
{
GimpConfigInterface *config_iface = NULL;
GimpConfig *prop_object;
prop_object = g_value_get_object (&value);
if (prop_object)
config_iface = GIMP_CONFIG_GET_INTERFACE (prop_object);
else
success = TRUE;
if (config_iface)
{
gimp_config_writer_open (writer, param_spec->name);
/* if the object property is not GIMP_CONFIG_PARAM_AGGREGATE,
* deserializing will need to know the exact type
* in order to create the object
*/
if (! (param_spec->flags & GIMP_CONFIG_PARAM_AGGREGATE))
{
GType object_type = G_TYPE_FROM_INSTANCE (prop_object);
gimp_config_writer_string (writer, g_type_name (object_type));
}
success = config_iface->serialize (prop_object, writer, NULL);
if (success)
gimp_config_writer_close (writer);
else
gimp_config_writer_revert (writer);
}
}
else
{
GString *str = g_string_new (NULL);
if (GIMP_VALUE_HOLDS_RGB (&value))
{
gboolean has_alpha = gimp_param_spec_rgb_has_alpha (param_spec);
success = gimp_config_serialize_rgb (&value, str, has_alpha);
}
else
{
success = gimp_config_serialize_value (&value, str, TRUE);
}
if (success)
{
gimp_config_writer_open (writer, param_spec->name);
gimp_config_writer_print (writer, str->str, str->len);
gimp_config_writer_close (writer);
}
g_string_free (str, TRUE);
}
if (! success)
{
/* don't warn for empty string properties */
if (G_VALUE_HOLDS_STRING (&value))
{
success = TRUE;
}
else
{
g_warning ("couldn't serialize property %s::%s of type %s",
g_type_name (G_TYPE_FROM_INSTANCE (config)),
param_spec->name,
g_type_name (param_spec->value_type));
}
}
}
g_value_unset (&value);
return success;
}
/**
* gimp_config_serialize_value:
* @value: a #GValue.
* @str: a #Gstring.
* @escaped: whether to escape string values.
*
* This utility function appends a string representation of #GValue to @str.
*
* Return value: %TRUE if serialization succeeded, %FALSE otherwise.
*
* Since: GIMP 2.4
**/
gboolean
gimp_config_serialize_value (const GValue *value,
GString *str,
gboolean escaped)
{
if (G_VALUE_HOLDS_BOOLEAN (value))
{
gboolean bool;
bool = g_value_get_boolean (value);
g_string_append (str, bool ? "yes" : "no");
return TRUE;
}
if (G_VALUE_HOLDS_ENUM (value))
{
GEnumClass *enum_class = g_type_class_peek (G_VALUE_TYPE (value));
GEnumValue *enum_value = g_enum_get_value (enum_class,
g_value_get_enum (value));
if (enum_value && enum_value->value_nick)
{
g_string_append (str, enum_value->value_nick);
return TRUE;
}
else
{
g_warning ("Couldn't get nick for enum_value of %s",
G_ENUM_CLASS_TYPE_NAME (enum_class));
return FALSE;
}
}
if (G_VALUE_HOLDS_STRING (value))
{
const gchar *cstr = g_value_get_string (value);
if (!cstr)
return FALSE;
if (escaped)
gimp_config_string_append_escaped (str, cstr);
else
g_string_append (str, cstr);
return TRUE;
}
if (G_VALUE_HOLDS_DOUBLE (value) || G_VALUE_HOLDS_FLOAT (value))
{
gdouble v_double;
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
if (G_VALUE_HOLDS_DOUBLE (value))
v_double = g_value_get_double (value);
else
v_double = (gdouble) g_value_get_float (value);
g_ascii_formatd (buf, sizeof (buf), "%f", v_double);
g_string_append (str, buf);
return TRUE;
}
if (GIMP_VALUE_HOLDS_RGB (value))
{
return gimp_config_serialize_rgb (value, str, TRUE);
}
if (GIMP_VALUE_HOLDS_MATRIX2 (value))
{
GimpMatrix2 *trafo;
gchar buf[4][G_ASCII_DTOSTR_BUF_SIZE];
gint i, j, k;
trafo = g_value_get_boxed (value);
for (i = 0, k = 0; i < 2; i++)
for (j = 0; j < 2; j++, k++)
g_ascii_formatd (buf[k],
G_ASCII_DTOSTR_BUF_SIZE, "%f", trafo->coeff[i][j]);
g_string_append_printf (str, "(matrix %s %s %s %s)",
buf[0], buf[1], buf[2], buf[3]);
return TRUE;
}
if (G_VALUE_TYPE (value) == G_TYPE_VALUE_ARRAY)
{
GValueArray *array;
array = g_value_get_boxed (value);
if (array)
{
gint i;
g_string_append_printf (str, "%d", array->n_values);
for (i = 0; i < array->n_values; i++)
{
g_string_append (str, " ");
if (! gimp_config_serialize_value (g_value_array_get_nth (array,
i),
str, TRUE))
return FALSE;
}
}
else
{
g_string_append (str, "NULL");
}
return TRUE;
}
if (g_value_type_transformable (G_VALUE_TYPE (value), G_TYPE_STRING))
{
GValue tmp_value = { 0, };
g_value_init (&tmp_value, G_TYPE_STRING);
g_value_transform (value, &tmp_value);
g_string_append (str, g_value_get_string (&tmp_value));
g_value_unset (&tmp_value);
return TRUE;
}
return FALSE;
}
static gboolean
gimp_config_serialize_rgb (const GValue *value,
GString *str,
gboolean has_alpha)
{
GimpRGB *rgb;
gchar buf[4][G_ASCII_DTOSTR_BUF_SIZE];
rgb = g_value_get_boxed (value);
g_ascii_formatd (buf[0], G_ASCII_DTOSTR_BUF_SIZE, "%f", rgb->r);
g_ascii_formatd (buf[1], G_ASCII_DTOSTR_BUF_SIZE, "%f", rgb->g);
g_ascii_formatd (buf[2], G_ASCII_DTOSTR_BUF_SIZE, "%f", rgb->b);
if (has_alpha)
{
g_ascii_formatd (buf[3], G_ASCII_DTOSTR_BUF_SIZE, "%f", rgb->a);
g_string_append_printf (str, "(color-rgba %s %s %s %s)",
buf[0], buf[1], buf[2], buf[3]);
}
else
{
g_string_append_printf (str, "(color-rgb %s %s %s)",
buf[0], buf[1], buf[2]);
}
return TRUE;
}
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