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gimp/app/config/gimpconfig-serialize.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 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 <stdio.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib-object.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#include "gimpconfig.h"
#include "gimpconfig-serialize.h"
#include "gimpconfig-types.h"
#include "gimpconfig-utils.h"
static void serialize_unknown_token (const gchar *key,
const gchar *value,
gpointer data);
/**
* gimp_config_serialize_properties:
* @object: a #GObject.
* @fd: a file descriptor to write to.
*
* This function writes all object properties to the file descriptor @fd.
**/
gboolean
gimp_config_serialize_properties (GObject *object,
gint fd)
{
GObjectClass *klass;
GParamSpec **property_specs;
guint n_property_specs;
guint i;
GString *str;
g_return_val_if_fail (G_IS_OBJECT (object), FALSE);
klass = G_OBJECT_GET_CLASS (object);
property_specs = g_object_class_list_properties (klass, &n_property_specs);
if (! property_specs)
return TRUE;
str = g_string_new (NULL);
for (i = 0; i < n_property_specs; i++)
{
GParamSpec *prop_spec;
GValue value = { 0, };
prop_spec = property_specs[i];
if (! (prop_spec->flags & G_PARAM_READWRITE))
continue;
g_value_init (&value, prop_spec->value_type);
g_object_get_property (object, prop_spec->name, &value);
g_string_assign (str, "(");
g_string_append (str, prop_spec->name);
g_string_append_c (str, ' ');
if (gimp_config_serialize_value (&value, str, TRUE))
{
g_string_append (str, ")\n");
if (write (fd, str->str, str->len) == -1)
return FALSE;
}
else if (prop_spec->value_type != G_TYPE_STRING)
{
g_warning ("couldn't serialize property %s::%s of type %s",
g_type_name (G_TYPE_FROM_INSTANCE (object)),
prop_spec->name,
g_type_name (prop_spec->value_type));
}
g_value_unset (&value);
}
g_free (property_specs);
g_string_free (str, TRUE);
return TRUE;
}
/**
* gimp_config_serialize_properties:
* @new: a #GObject.
* @old: a #GObject of the same type as @new.
* @fd: a file descriptor to write to.
*
* This function compares the objects @new and @old and writes all properties
* of @new that have different values than @old to the file descriptor @fd.
**/
gboolean
gimp_config_serialize_changed_properties (GObject *new,
GObject *old,
gint fd)
{
GObjectClass *klass;
GParamSpec **property_specs;
guint n_property_specs;
guint i;
GString *str;
g_return_val_if_fail (G_IS_OBJECT (new), FALSE);
g_return_val_if_fail (G_IS_OBJECT (old), FALSE);
g_return_val_if_fail (G_TYPE_FROM_INSTANCE (new) ==
G_TYPE_FROM_INSTANCE (old), FALSE);
klass = G_OBJECT_GET_CLASS (new);
property_specs = g_object_class_list_properties (klass, &n_property_specs);
if (!property_specs)
return TRUE;
str = g_string_new (NULL);
for (i = 0; i < n_property_specs; i++)
{
GParamSpec *prop_spec;
GValue new_value = { 0, };
GValue old_value = { 0, };
prop_spec = property_specs[i];
if (! (prop_spec->flags & G_PARAM_READWRITE))
continue;
g_value_init (&new_value, prop_spec->value_type);
g_value_init (&old_value, prop_spec->value_type);
g_object_get_property (new, prop_spec->name, &new_value);
g_object_get_property (old, prop_spec->name, &old_value);
if (!gimp_config_values_equal (&new_value, &old_value))
{
g_string_assign (str, "(");
g_string_append (str, prop_spec->name);
g_string_append_c (str, ' ');
if (gimp_config_serialize_value (&new_value, str, TRUE))
{
g_string_append (str, ")\n");
if (write (fd, str->str, str->len) == -1)
return FALSE;
}
else if (prop_spec->value_type != G_TYPE_STRING)
{
g_warning ("couldn't serialize property %s::%s of type %s",
g_type_name (G_TYPE_FROM_INSTANCE (new)),
prop_spec->name,
g_type_name (prop_spec->value_type));
}
}
g_value_unset (&new_value);
g_value_unset (&old_value);
}
g_free (property_specs);
g_string_free (str, TRUE);
return TRUE;
}
/**
* 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.
**/
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;
GEnumValue *enum_value;
enum_class = g_type_class_peek (G_VALUE_TYPE (value));
enum_value = g_enum_get_value (G_ENUM_CLASS (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))
{
gchar *esc;
const gchar *cstr = g_value_get_string (value);
if (!cstr)
return FALSE;
if (escaped)
{
esc = g_strescape (cstr, NULL);
g_string_append_printf (str, "\"%s\"", esc);
g_free (esc);
}
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 (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;
}
/**
* gimp_config_serialize_unknown_tokens:
* @object: a #GObject.
* @fd: a file descriptor to write to.
*
* Writes all unknown tokens attached to #object to the file descriptor @fd.
* See gimp_config_add_unknown_token().
**/
gboolean
gimp_config_serialize_unknown_tokens (GObject *object,
gint fd)
{
GString *str;
g_return_val_if_fail (G_IS_OBJECT (object), FALSE);
str = g_string_new (NULL);
gimp_config_foreach_unknown_token (object, serialize_unknown_token, str);
return (write (fd, str->str, str->len) != -1);
}
static void
serialize_unknown_token (const gchar *key,
const gchar *value,
gpointer data)
{
gchar *escaped = g_strescape (value, NULL);
g_string_append_printf ((GString *) data, "(%s \"%s\")\n", key, escaped);
g_free (escaped);
}
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