483 lines
13 KiB
C
483 lines
13 KiB
C
|
/* LIBPIKA - The PIKA Library
|
||
|
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
|
||
|
*
|
||
|
* Utility functions for PikaConfig.
|
||
|
* Copyright (C) 2001-2003 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 <gio/gio.h>
|
||
|
|
||
|
#include "libpikabase/pikabase.h"
|
||
|
|
||
|
#include "pikaconfigtypes.h"
|
||
|
|
||
|
#include "pikaconfigwriter.h"
|
||
|
#include "pikaconfig-iface.h"
|
||
|
#include "pikaconfig-params.h"
|
||
|
#include "pikaconfig-utils.h"
|
||
|
|
||
|
|
||
|
/**
|
||
|
* SECTION: pikaconfig-utils
|
||
|
* @title: PikaConfig-utils
|
||
|
* @short_description: Miscellaneous utility functions for libpikaconfig.
|
||
|
*
|
||
|
* Miscellaneous utility functions for libpikaconfig.
|
||
|
**/
|
||
|
|
||
|
|
||
|
static gboolean
|
||
|
pika_config_diff_property (GObject *a,
|
||
|
GObject *b,
|
||
|
GParamSpec *prop_spec)
|
||
|
{
|
||
|
GValue a_value = G_VALUE_INIT;
|
||
|
GValue b_value = G_VALUE_INIT;
|
||
|
gboolean retval = FALSE;
|
||
|
|
||
|
g_value_init (&a_value, prop_spec->value_type);
|
||
|
g_value_init (&b_value, prop_spec->value_type);
|
||
|
|
||
|
g_object_get_property (a, prop_spec->name, &a_value);
|
||
|
g_object_get_property (b, prop_spec->name, &b_value);
|
||
|
|
||
|
if (g_param_values_cmp (prop_spec, &a_value, &b_value))
|
||
|
{
|
||
|
if ((prop_spec->flags & PIKA_CONFIG_PARAM_AGGREGATE) &&
|
||
|
G_IS_PARAM_SPEC_OBJECT (prop_spec) &&
|
||
|
g_type_interface_peek (g_type_class_peek (prop_spec->value_type),
|
||
|
PIKA_TYPE_CONFIG))
|
||
|
{
|
||
|
if (! pika_config_is_equal_to (g_value_get_object (&a_value),
|
||
|
g_value_get_object (&b_value)))
|
||
|
{
|
||
|
retval = TRUE;
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
retval = TRUE;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
g_value_unset (&a_value);
|
||
|
g_value_unset (&b_value);
|
||
|
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
static GList *
|
||
|
pika_config_diff_same (GObject *a,
|
||
|
GObject *b,
|
||
|
GParamFlags flags)
|
||
|
{
|
||
|
GParamSpec **param_specs;
|
||
|
guint n_param_specs;
|
||
|
guint i;
|
||
|
GList *list = NULL;
|
||
|
|
||
|
param_specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (a),
|
||
|
&n_param_specs);
|
||
|
|
||
|
for (i = 0; i < n_param_specs; i++)
|
||
|
{
|
||
|
GParamSpec *prop_spec = param_specs[i];
|
||
|
|
||
|
if (! flags || ((prop_spec->flags & flags) == flags))
|
||
|
{
|
||
|
if (pika_config_diff_property (a, b, prop_spec))
|
||
|
list = g_list_prepend (list, prop_spec);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
g_free (param_specs);
|
||
|
|
||
|
return list;
|
||
|
}
|
||
|
|
||
|
static GList *
|
||
|
pika_config_diff_other (GObject *a,
|
||
|
GObject *b,
|
||
|
GParamFlags flags)
|
||
|
{
|
||
|
GParamSpec **param_specs;
|
||
|
guint n_param_specs;
|
||
|
guint i;
|
||
|
GList *list = NULL;
|
||
|
|
||
|
param_specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (a),
|
||
|
&n_param_specs);
|
||
|
|
||
|
for (i = 0; i < n_param_specs; i++)
|
||
|
{
|
||
|
GParamSpec *a_spec = param_specs[i];
|
||
|
GParamSpec *b_spec = g_object_class_find_property (G_OBJECT_GET_CLASS (b),
|
||
|
a_spec->name);
|
||
|
|
||
|
if (b_spec &&
|
||
|
(a_spec->value_type == b_spec->value_type) &&
|
||
|
(! flags || (a_spec->flags & b_spec->flags & flags) == flags))
|
||
|
{
|
||
|
if (pika_config_diff_property (a, b, b_spec))
|
||
|
list = g_list_prepend (list, b_spec);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
g_free (param_specs);
|
||
|
|
||
|
return list;
|
||
|
}
|
||
|
|
||
|
|
||
|
/**
|
||
|
* pika_config_diff:
|
||
|
* @a: a #GObject
|
||
|
* @b: another #GObject object
|
||
|
* @flags: a mask of GParamFlags
|
||
|
*
|
||
|
* Compares all properties of @a and @b that have all @flags set. If
|
||
|
* @flags is 0, all properties are compared.
|
||
|
*
|
||
|
* If the two objects are not of the same type, only properties that
|
||
|
* exist in both object classes and are of the same value_type are
|
||
|
* compared.
|
||
|
*
|
||
|
* Returns: (transfer container) (element-type GParamSpec): a GList of differing GParamSpecs.
|
||
|
*
|
||
|
* Since: 2.4
|
||
|
**/
|
||
|
GList *
|
||
|
pika_config_diff (GObject *a,
|
||
|
GObject *b,
|
||
|
GParamFlags flags)
|
||
|
{
|
||
|
GList *diff;
|
||
|
|
||
|
g_return_val_if_fail (G_IS_OBJECT (a), NULL);
|
||
|
g_return_val_if_fail (G_IS_OBJECT (b), NULL);
|
||
|
|
||
|
if (G_TYPE_FROM_INSTANCE (a) == G_TYPE_FROM_INSTANCE (b))
|
||
|
diff = pika_config_diff_same (a, b, flags);
|
||
|
else
|
||
|
diff = pika_config_diff_other (a, b, flags);
|
||
|
|
||
|
return g_list_reverse (diff);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* pika_config_sync:
|
||
|
* @src: a #GObject
|
||
|
* @dest: another #GObject
|
||
|
* @flags: a mask of GParamFlags
|
||
|
*
|
||
|
* Compares all read- and write-able properties from @src and @dest
|
||
|
* that have all @flags set. Differing values are then copied from
|
||
|
* @src to @dest. If @flags is 0, all differing read/write properties.
|
||
|
*
|
||
|
* Properties marked as "construct-only" are not touched.
|
||
|
*
|
||
|
* If the two objects are not of the same type, only properties that
|
||
|
* exist in both object classes and are of the same value_type are
|
||
|
* synchronized
|
||
|
*
|
||
|
* Returns: %TRUE if @dest was modified, %FALSE otherwise
|
||
|
*
|
||
|
* Since: 2.4
|
||
|
**/
|
||
|
gboolean
|
||
|
pika_config_sync (GObject *src,
|
||
|
GObject *dest,
|
||
|
GParamFlags flags)
|
||
|
{
|
||
|
GList *diff;
|
||
|
GList *list;
|
||
|
|
||
|
g_return_val_if_fail (G_IS_OBJECT (src), FALSE);
|
||
|
g_return_val_if_fail (G_IS_OBJECT (dest), FALSE);
|
||
|
|
||
|
/* we use the internal versions here for a number of reasons:
|
||
|
* - it saves a g_list_reverse()
|
||
|
* - it avoids duplicated parameter checks
|
||
|
*/
|
||
|
if (G_TYPE_FROM_INSTANCE (src) == G_TYPE_FROM_INSTANCE (dest))
|
||
|
diff = pika_config_diff_same (src, dest, (flags | G_PARAM_READWRITE));
|
||
|
else
|
||
|
diff = pika_config_diff_other (src, dest, flags);
|
||
|
|
||
|
if (!diff)
|
||
|
return FALSE;
|
||
|
|
||
|
g_object_freeze_notify (G_OBJECT (dest));
|
||
|
|
||
|
for (list = diff; list; list = list->next)
|
||
|
{
|
||
|
GParamSpec *prop_spec = list->data;
|
||
|
|
||
|
if (! (prop_spec->flags & G_PARAM_CONSTRUCT_ONLY))
|
||
|
{
|
||
|
GValue value = G_VALUE_INIT;
|
||
|
|
||
|
g_value_init (&value, prop_spec->value_type);
|
||
|
|
||
|
g_object_get_property (src, prop_spec->name, &value);
|
||
|
g_object_set_property (dest, prop_spec->name, &value);
|
||
|
|
||
|
g_value_unset (&value);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
g_object_thaw_notify (G_OBJECT (dest));
|
||
|
|
||
|
g_list_free (diff);
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* pika_config_reset_properties:
|
||
|
* @object: a #GObject
|
||
|
*
|
||
|
* Resets all writable properties of @object to the default values as
|
||
|
* defined in their #GParamSpec. Properties marked as "construct-only"
|
||
|
* are not touched.
|
||
|
*
|
||
|
* If you want to reset a #PikaConfig object, please use pika_config_reset().
|
||
|
*
|
||
|
* Since: 2.4
|
||
|
**/
|
||
|
void
|
||
|
pika_config_reset_properties (GObject *object)
|
||
|
{
|
||
|
GObjectClass *klass;
|
||
|
GParamSpec **property_specs;
|
||
|
guint n_property_specs;
|
||
|
guint i;
|
||
|
|
||
|
g_return_if_fail (G_IS_OBJECT (object));
|
||
|
|
||
|
klass = G_OBJECT_GET_CLASS (object);
|
||
|
|
||
|
property_specs = g_object_class_list_properties (klass, &n_property_specs);
|
||
|
if (!property_specs)
|
||
|
return;
|
||
|
|
||
|
g_object_freeze_notify (object);
|
||
|
|
||
|
for (i = 0; i < n_property_specs; i++)
|
||
|
{
|
||
|
GParamSpec *prop_spec;
|
||
|
GValue value = G_VALUE_INIT;
|
||
|
|
||
|
prop_spec = property_specs[i];
|
||
|
|
||
|
if ((prop_spec->flags & G_PARAM_WRITABLE) &&
|
||
|
! (prop_spec->flags & G_PARAM_CONSTRUCT_ONLY))
|
||
|
{
|
||
|
if (G_IS_PARAM_SPEC_OBJECT (prop_spec))
|
||
|
{
|
||
|
if ((prop_spec->flags & PIKA_CONFIG_PARAM_SERIALIZE) &&
|
||
|
(prop_spec->flags & PIKA_CONFIG_PARAM_AGGREGATE) &&
|
||
|
g_type_interface_peek (g_type_class_peek (prop_spec->value_type),
|
||
|
PIKA_TYPE_CONFIG))
|
||
|
{
|
||
|
g_value_init (&value, prop_spec->value_type);
|
||
|
|
||
|
g_object_get_property (object, prop_spec->name, &value);
|
||
|
|
||
|
pika_config_reset (g_value_get_object (&value));
|
||
|
|
||
|
g_value_unset (&value);
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
GValue default_value = G_VALUE_INIT;
|
||
|
|
||
|
g_value_init (&default_value, prop_spec->value_type);
|
||
|
g_value_init (&value, prop_spec->value_type);
|
||
|
|
||
|
g_param_value_set_default (prop_spec, &default_value);
|
||
|
g_object_get_property (object, prop_spec->name, &value);
|
||
|
|
||
|
if (g_param_values_cmp (prop_spec, &default_value, &value))
|
||
|
{
|
||
|
g_object_set_property (object, prop_spec->name,
|
||
|
&default_value);
|
||
|
}
|
||
|
|
||
|
g_value_unset (&value);
|
||
|
g_value_unset (&default_value);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
g_object_thaw_notify (object);
|
||
|
|
||
|
g_free (property_specs);
|
||
|
}
|
||
|
|
||
|
|
||
|
/**
|
||
|
* pika_config_reset_property:
|
||
|
* @object: a #GObject
|
||
|
* @property_name: name of the property to reset
|
||
|
*
|
||
|
* Resets the property named @property_name to its default value. The
|
||
|
* property must be writable and must not be marked as "construct-only".
|
||
|
*
|
||
|
* Since: 2.4
|
||
|
**/
|
||
|
void
|
||
|
pika_config_reset_property (GObject *object,
|
||
|
const gchar *property_name)
|
||
|
{
|
||
|
GObjectClass *klass;
|
||
|
GParamSpec *prop_spec;
|
||
|
|
||
|
g_return_if_fail (G_IS_OBJECT (object));
|
||
|
g_return_if_fail (property_name != NULL);
|
||
|
|
||
|
klass = G_OBJECT_GET_CLASS (object);
|
||
|
|
||
|
prop_spec = g_object_class_find_property (klass, property_name);
|
||
|
|
||
|
if (!prop_spec)
|
||
|
return;
|
||
|
|
||
|
if ((prop_spec->flags & G_PARAM_WRITABLE) &&
|
||
|
! (prop_spec->flags & G_PARAM_CONSTRUCT_ONLY))
|
||
|
{
|
||
|
GValue value = G_VALUE_INIT;
|
||
|
|
||
|
if (G_IS_PARAM_SPEC_OBJECT (prop_spec))
|
||
|
{
|
||
|
if ((prop_spec->flags & PIKA_CONFIG_PARAM_SERIALIZE) &&
|
||
|
(prop_spec->flags & PIKA_CONFIG_PARAM_AGGREGATE) &&
|
||
|
g_type_interface_peek (g_type_class_peek (prop_spec->value_type),
|
||
|
PIKA_TYPE_CONFIG))
|
||
|
{
|
||
|
g_value_init (&value, prop_spec->value_type);
|
||
|
|
||
|
g_object_get_property (object, prop_spec->name, &value);
|
||
|
|
||
|
pika_config_reset (g_value_get_object (&value));
|
||
|
|
||
|
g_value_unset (&value);
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
g_value_init (&value, prop_spec->value_type);
|
||
|
g_param_value_set_default (prop_spec, &value);
|
||
|
|
||
|
g_object_set_property (object, prop_spec->name, &value);
|
||
|
|
||
|
g_value_unset (&value);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* PikaConfig string utilities
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* pika_config_string_append_escaped:
|
||
|
* @string: pointer to a #GString
|
||
|
* @val: a string to append or %NULL
|
||
|
*
|
||
|
* Escapes and quotes @val and appends it to @string. The escape
|
||
|
* algorithm is different from the one used by g_strescape() since it
|
||
|
* leaves non-ASCII characters intact and thus preserves UTF-8
|
||
|
* strings. Only control characters and quotes are being escaped.
|
||
|
*
|
||
|
* Since: 2.4
|
||
|
**/
|
||
|
void
|
||
|
pika_config_string_append_escaped (GString *string,
|
||
|
const gchar *val)
|
||
|
{
|
||
|
g_return_if_fail (string != NULL);
|
||
|
|
||
|
if (val)
|
||
|
{
|
||
|
const guchar *p;
|
||
|
gchar buf[4] = { '\\', 0, 0, 0 };
|
||
|
gint len;
|
||
|
|
||
|
g_string_append_c (string, '\"');
|
||
|
|
||
|
for (p = (const guchar *) val, len = 0; *p; p++)
|
||
|
{
|
||
|
if (*p < ' ' || *p == '\\' || *p == '\"')
|
||
|
{
|
||
|
g_string_append_len (string, val, len);
|
||
|
|
||
|
len = 2;
|
||
|
switch (*p)
|
||
|
{
|
||
|
case '\b':
|
||
|
buf[1] = 'b';
|
||
|
break;
|
||
|
case '\f':
|
||
|
buf[1] = 'f';
|
||
|
break;
|
||
|
case '\n':
|
||
|
buf[1] = 'n';
|
||
|
break;
|
||
|
case '\r':
|
||
|
buf[1] = 'r';
|
||
|
break;
|
||
|
case '\t':
|
||
|
buf[1] = 't';
|
||
|
break;
|
||
|
case '\\':
|
||
|
case '"':
|
||
|
buf[1] = *p;
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
len = 4;
|
||
|
buf[1] = '0' + (((*p) >> 6) & 07);
|
||
|
buf[2] = '0' + (((*p) >> 3) & 07);
|
||
|
buf[3] = '0' + ((*p) & 07);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
g_string_append_len (string, buf, len);
|
||
|
|
||
|
val = (const gchar *) p + 1;
|
||
|
len = 0;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
len++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
g_string_append_len (string, val, len);
|
||
|
g_string_append_c (string, '\"');
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
g_string_append_len (string, "\"\"", 2);
|
||
|
}
|
||
|
}
|