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glib/gio/gsettings-mapping.c
Ryan Lortie ab1111b8bb GSettings: peek instead of ref/unref enum class 
We only ever do the enum mapping for the property binding in the case
that a GParamSpecEnum exists and in that case the class is already
referenced by the GParamSpec.  Use peek instead of ref/unref and add a
clarifying note.
2010-06-28 13:58:25 -04:00

518 lines
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/*
* Copyright © 2010 Novell, Inc.
*
* 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 2 of the licence, 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
* Lesser 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Vincent Untz <vuntz@gnome.org>
*/
#include "config.h"
#include "gsettings-mapping.h"
static GVariant *
g_settings_set_mapping_int (const GValue *value,
const GVariantType *expected_type)
{
GVariant *variant = NULL;
gint64 l;
if (G_VALUE_HOLDS_INT (value))
l = g_value_get_int (value);
else if (G_VALUE_HOLDS_INT64 (value))
l = g_value_get_int64 (value);
else
return NULL;
if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT16))
{
if (G_MININT16 <= l && l <= G_MAXINT16)
variant = g_variant_new_int16 ((gint16) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT16))
{
if (0 <= l && l <= G_MAXUINT16)
variant = g_variant_new_uint16 ((guint16) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT32))
{
if (G_MININT32 <= l && l <= G_MAXINT32)
variant = g_variant_new_int32 ((gint) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT32))
{
if (0 <= l && l <= G_MAXUINT32)
variant = g_variant_new_uint32 ((guint) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT64))
{
if (G_MININT64 <= l && l <= G_MAXINT64)
variant = g_variant_new_int64 ((gint64) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT64))
{
if (0 <= l && l <= G_MAXUINT64)
variant = g_variant_new_uint64 ((guint64) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_HANDLE))
{
if (0 <= l && l <= G_MAXUINT32)
variant = g_variant_new_handle ((guint) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_DOUBLE))
variant = g_variant_new_double ((gdouble) l);
return variant;
}
static GVariant *
g_settings_set_mapping_float (const GValue *value,
const GVariantType *expected_type)
{
GVariant *variant = NULL;
gdouble d;
gint64 l;
if (G_VALUE_HOLDS_DOUBLE (value))
d = g_value_get_double (value);
else
return NULL;
l = (gint64) d;
if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT16))
{
if (G_MININT16 <= l && l <= G_MAXINT16)
variant = g_variant_new_int16 ((gint16) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT16))
{
if (0 <= l && l <= G_MAXUINT16)
variant = g_variant_new_uint16 ((guint16) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT32))
{
if (G_MININT32 <= l && l <= G_MAXINT32)
variant = g_variant_new_int32 ((gint) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT32))
{
if (0 <= l && l <= G_MAXUINT32)
variant = g_variant_new_uint32 ((guint) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT64))
{
if (G_MININT64 <= l && l <= G_MAXINT64)
variant = g_variant_new_int64 ((gint64) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT64))
{
if (0 <= l && l <= G_MAXUINT64)
variant = g_variant_new_uint64 ((guint64) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_HANDLE))
{
if (0 <= l && l <= G_MAXUINT32)
variant = g_variant_new_handle ((guint) l);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_DOUBLE))
variant = g_variant_new_double ((gdouble) d);
return variant;
}
static GVariant *
g_settings_set_mapping_unsigned_int (const GValue *value,
const GVariantType *expected_type)
{
GVariant *variant = NULL;
guint64 u;
if (G_VALUE_HOLDS_UINT (value))
u = g_value_get_uint (value);
else if (G_VALUE_HOLDS_UINT64 (value))
u = g_value_get_uint64 (value);
else
return NULL;
if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT16))
{
if (u <= G_MAXINT16)
variant = g_variant_new_int16 ((gint16) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT16))
{
if (u <= G_MAXUINT16)
variant = g_variant_new_uint16 ((guint16) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT32))
{
if (u <= G_MAXINT32)
variant = g_variant_new_int32 ((gint) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT32))
{
if (u <= G_MAXUINT32)
variant = g_variant_new_uint32 ((guint) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT64))
{
if (u <= G_MAXINT64)
variant = g_variant_new_int64 ((gint64) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT64))
{
if (u <= G_MAXUINT64)
variant = g_variant_new_uint64 ((guint64) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_HANDLE))
{
if (u <= G_MAXUINT32)
variant = g_variant_new_handle ((guint) u);
}
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_DOUBLE))
variant = g_variant_new_double ((gdouble) u);
return variant;
}
static gboolean
g_settings_get_mapping_int (GValue *value,
GVariant *variant)
{
const GVariantType *type;
gint64 l;
type = g_variant_get_type (variant);
if (g_variant_type_equal (type, G_VARIANT_TYPE_INT16))
l = g_variant_get_int16 (variant);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT32))
l = g_variant_get_int32 (variant);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT64))
l = g_variant_get_int64 (variant);
else
return FALSE;
if (G_VALUE_HOLDS_INT (value))
{
g_value_set_int (value, l);
return (G_MININT32 <= l && l <= G_MAXINT32);
}
else if (G_VALUE_HOLDS_UINT (value))
{
g_value_set_uint (value, l);
return (0 <= l && l <= G_MAXUINT32);
}
else if (G_VALUE_HOLDS_INT64 (value))
{
g_value_set_int64 (value, l);
return (G_MININT64 <= l && l <= G_MAXINT64);
}
else if (G_VALUE_HOLDS_UINT64 (value))
{
g_value_set_uint64 (value, l);
return (0 <= l && l <= G_MAXUINT64);
}
else if (G_VALUE_HOLDS_DOUBLE (value))
{
g_value_set_double (value, l);
return TRUE;
}
return FALSE;
}
static gboolean
g_settings_get_mapping_float (GValue *value,
GVariant *variant)
{
const GVariantType *type;
gdouble d;
gint64 l;
type = g_variant_get_type (variant);
if (g_variant_type_equal (type, G_VARIANT_TYPE_DOUBLE))
d = g_variant_get_double (variant);
else
return FALSE;
l = (gint64)d;
if (G_VALUE_HOLDS_INT (value))
{
g_value_set_int (value, l);
return (G_MININT32 <= l && l <= G_MAXINT32);
}
else if (G_VALUE_HOLDS_UINT (value))
{
g_value_set_uint (value, l);
return (0 <= l && l <= G_MAXUINT32);
}
else if (G_VALUE_HOLDS_INT64 (value))
{
g_value_set_int64 (value, l);
return (G_MININT64 <= l && l <= G_MAXINT64);
}
else if (G_VALUE_HOLDS_UINT64 (value))
{
g_value_set_uint64 (value, l);
return (0 <= l && l <= G_MAXUINT64);
}
else if (G_VALUE_HOLDS_DOUBLE (value))
{
g_value_set_double (value, d);
return TRUE;
}
return FALSE;
}
static gboolean
g_settings_get_mapping_unsigned_int (GValue *value,
GVariant *variant)
{
const GVariantType *type;
guint64 u;
type = g_variant_get_type (variant);
if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT16))
u = g_variant_get_uint16 (variant);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT32))
u = g_variant_get_uint32 (variant);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT64))
u = g_variant_get_uint64 (variant);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
u = g_variant_get_handle (variant);
else
return FALSE;
if (G_VALUE_HOLDS_INT (value))
{
g_value_set_int (value, u);
return (u <= G_MAXINT32);
}
else if (G_VALUE_HOLDS_UINT (value))
{
g_value_set_uint (value, u);
return (u <= G_MAXUINT32);
}
else if (G_VALUE_HOLDS_INT64 (value))
{
g_value_set_int64 (value, u);
return (u <= G_MAXINT64);
}
else if (G_VALUE_HOLDS_UINT64 (value))
{
g_value_set_uint64 (value, u);
return (u <= G_MAXUINT64);
}
else if (G_VALUE_HOLDS_DOUBLE (value))
{
g_value_set_double (value, u);
return TRUE;
}
return FALSE;
}
GVariant *
g_settings_set_mapping (const GValue *value,
const GVariantType *expected_type,
gpointer user_data)
{
gchar *type_string;
if (G_VALUE_HOLDS_BOOLEAN (value))
{
if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_BOOLEAN))
return g_variant_new_boolean (g_value_get_boolean (value));
}
else if (G_VALUE_HOLDS_CHAR (value) ||
G_VALUE_HOLDS_UCHAR (value))
{
if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_BYTE))
{
if (G_VALUE_HOLDS_CHAR (value))
return g_variant_new_byte (g_value_get_char (value));
else
return g_variant_new_byte (g_value_get_uchar (value));
}
}
else if (G_VALUE_HOLDS_INT (value) ||
G_VALUE_HOLDS_INT64 (value))
return g_settings_set_mapping_int (value, expected_type);
else if (G_VALUE_HOLDS_DOUBLE (value))
return g_settings_set_mapping_float (value, expected_type);
else if (G_VALUE_HOLDS_UINT (value) ||
G_VALUE_HOLDS_UINT64 (value))
return g_settings_set_mapping_unsigned_int (value, expected_type);
else if (G_VALUE_HOLDS_STRING (value))
{
if (g_value_get_string (value) == NULL)
return NULL;
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_STRING))
return g_variant_new_string (g_value_get_string (value));
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE ("ay")))
return g_variant_new_byte_array (g_value_get_string (value), -1);
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_OBJECT_PATH))
return g_variant_new_object_path (g_value_get_string (value));
else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_SIGNATURE))
return g_variant_new_signature (g_value_get_string (value));
}
else if (G_VALUE_HOLDS_ENUM (value))
{
GEnumValue *enumval;
GEnumClass *eclass;
/* GParamSpecEnum holds a ref on the class so we just peek... */
eclass = g_type_class_peek (G_VALUE_TYPE (value));
enumval = g_enum_get_value (eclass, g_value_get_enum (value));
if (enumval)
return g_variant_new_string (enumval->value_nick);
else
return NULL;
}
type_string = g_variant_type_dup_string (expected_type);
g_critical ("No GSettings bind handler for type \"%s\".", type_string);
g_free (type_string);
return NULL;
}
gboolean
g_settings_get_mapping (GValue *value,
GVariant *variant,
gpointer user_data)
{
if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BOOLEAN))
{
if (!G_VALUE_HOLDS_BOOLEAN (value))
return FALSE;
g_value_set_boolean (value, g_variant_get_boolean (variant));
return TRUE;
}
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BYTE))
{
if (G_VALUE_HOLDS_UCHAR (value))
g_value_set_uchar (value, g_variant_get_byte (variant));
else if (G_VALUE_HOLDS_CHAR (value))
g_value_set_char (value, (gchar) g_variant_get_byte (variant));
else
return FALSE;
return TRUE;
}
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_INT16) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_INT32) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_INT64))
return g_settings_get_mapping_int (value, variant);
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_DOUBLE))
return g_settings_get_mapping_float (value, variant);
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT16) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT32) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT64) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_HANDLE))
return g_settings_get_mapping_unsigned_int (value, variant);
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_STRING) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_OBJECT_PATH) ||
g_variant_is_of_type (variant, G_VARIANT_TYPE_SIGNATURE))
{
if (G_VALUE_HOLDS_STRING (value))
{
g_value_set_string (value, g_variant_get_string (variant, NULL));
return TRUE;
}
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_STRING) &&
G_VALUE_HOLDS_ENUM (value))
{
GEnumClass *eclass;
GEnumValue *evalue;
const gchar *nick;
/* GParamSpecEnum holds a ref on the class so we just peek... */
eclass = g_type_class_peek (G_VALUE_TYPE (value));
nick = g_variant_get_string (variant, NULL);
evalue = g_enum_get_value_by_nick (eclass, nick);
if (evalue)
{
g_value_set_enum (value, evalue->value);
return TRUE;
}
g_warning ("Unable to lookup enum nick '%s' via GType\n", nick);
return FALSE;
}
}
else if (g_variant_is_of_type (variant, G_VARIANT_TYPE ("ay")))
{
g_value_set_string (value, g_variant_get_byte_array (variant, NULL));
return TRUE;
}
g_critical ("No GSettings bind handler for type \"%s\".",
g_variant_get_type_string (variant));
return FALSE;
}
gboolean
g_settings_mapping_is_compatible (GType gvalue_type,
const GVariantType *variant_type)
{
gboolean ok = FALSE;
if (gvalue_type == G_TYPE_BOOLEAN)
ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE_BOOLEAN);
else if (gvalue_type == G_TYPE_CHAR ||
gvalue_type == G_TYPE_UCHAR)
ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE_BYTE);
else if (gvalue_type == G_TYPE_INT ||
gvalue_type == G_TYPE_UINT ||
gvalue_type == G_TYPE_INT64 ||
gvalue_type == G_TYPE_UINT64 ||
gvalue_type == G_TYPE_DOUBLE)
ok = (g_variant_type_equal (variant_type, G_VARIANT_TYPE_INT16) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_UINT16) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_INT32) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_UINT32) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_INT64) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_UINT64) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_HANDLE) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_DOUBLE));
else if (gvalue_type == G_TYPE_STRING)
ok = (g_variant_type_equal (variant_type, G_VARIANT_TYPE_STRING) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE ("ay")) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_OBJECT_PATH) ||
g_variant_type_equal (variant_type, G_VARIANT_TYPE_SIGNATURE));
else if (G_TYPE_IS_ENUM (gvalue_type))
ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE_STRING);
return ok;
}
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