glib/gobject/testgobject.c

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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 2001 Red Hat, 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 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
* 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.
*/
#include <string.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "TestObject"
#include <glib-object.h>
/* --- TestIface --- */
#define TEST_TYPE_IFACE (test_iface_get_type ())
#define TEST_IFACE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TEST_TYPE_IFACE, TestIface))
#define TEST_IS_IFACE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TEST_TYPE_IFACE))
#define TEST_IFACE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), TEST_TYPE_IFACE, TestIfaceClass))
typedef struct _TestIface TestIface;
typedef struct _TestIfaceClass TestIfaceClass;
struct _TestIfaceClass
{
GTypeInterface base_iface;
void (*print_string) (TestIface *tiobj,
const gchar *string);
};
static void iface_base_init (TestIfaceClass *iface);
static void iface_base_finalize (TestIfaceClass *iface);
static void print_foo (TestIface *tiobj,
const gchar *string);
static GType
test_iface_get_type (void)
{
static GType test_iface_type = 0;
if (!test_iface_type)
{
static const GTypeInfo test_iface_info =
{
sizeof (TestIfaceClass),
(GBaseInitFunc) iface_base_init, /* base_init */
(GBaseFinalizeFunc) iface_base_finalize, /* base_finalize */
};
test_iface_type = g_type_register_static (G_TYPE_INTERFACE, "TestIface", &test_iface_info, 0);
g_type_interface_add_prerequisite (test_iface_type, G_TYPE_OBJECT);
}
return test_iface_type;
}
static guint iface_base_init_count = 0;
static void
iface_base_init (TestIfaceClass *iface)
{
iface_base_init_count++;
if (iface_base_init_count == 1)
{
/* add signals here */
}
}
static void
iface_base_finalize (TestIfaceClass *iface)
{
iface_base_init_count--;
if (iface_base_init_count == 0)
{
/* destroy signals here */
}
}
static void
print_foo (TestIface *tiobj,
const gchar *string)
{
if (!string)
string = "<NULL>";
g_print ("Iface-FOO: \"%s\" from %p\n", string, tiobj);
}
static void
test_object_test_iface_init (gpointer giface,
gpointer iface_data)
{
TestIfaceClass *iface = giface;
g_assert (iface_data == GUINT_TO_POINTER (42));
g_assert (G_TYPE_FROM_INTERFACE (iface) == TEST_TYPE_IFACE);
/* assert iface_base_init() was already called */
g_assert (iface_base_init_count > 0);
/* initialize stuff */
iface->print_string = print_foo;
}
static void
iface_print_string (TestIface *tiobj,
const gchar *string)
{
TestIfaceClass *iface;
g_return_if_fail (TEST_IS_IFACE (tiobj));
g_return_if_fail (G_IS_OBJECT (tiobj)); /* ensured through prerequisite */
iface = TEST_IFACE_GET_CLASS (tiobj);
g_object_ref (tiobj);
iface->print_string (tiobj, string);
g_object_unref (tiobj);
}
/* --- TestObject --- */
#define TEST_TYPE_OBJECT (test_object_get_type ())
#define TEST_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), TEST_TYPE_OBJECT, TestObject))
#define TEST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TEST_TYPE_OBJECT, TestObjectClass))
#define TEST_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), TEST_TYPE_OBJECT))
#define TEST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TEST_TYPE_OBJECT))
#define TEST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), TEST_TYPE_OBJECT, TestObjectClass))
#define TEST_OBJECT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TEST_TYPE_OBJECT, TestObjectPrivate))
typedef struct _TestObject TestObject;
typedef struct _TestObjectClass TestObjectClass;
typedef struct _TestObjectPrivate TestObjectPrivate;
struct _TestObject
{
GObject parent_instance;
};
struct _TestObjectClass
{
GObjectClass parent_class;
gchar* (*test_signal) (TestObject *tobject,
TestIface *iface_object,
gpointer tdata);
};
struct _TestObjectPrivate
{
int dummy1;
gdouble dummy2;
};
static void test_object_class_init (TestObjectClass *class);
static void test_object_init (TestObject *tobject);
static gboolean test_signal_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer data);
static gchar* test_object_test_signal (TestObject *tobject,
TestIface *iface_object,
gpointer tdata);
static GType
test_object_get_type (void)
{
static GType test_object_type = 0;
if (!test_object_type)
{
static const GTypeInfo test_object_info =
{
sizeof (TestObjectClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) test_object_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (TestObject),
5, /* n_preallocs */
(GInstanceInitFunc) test_object_init,
};
GInterfaceInfo iface_info = { test_object_test_iface_init, NULL, GUINT_TO_POINTER (42) };
test_object_type = g_type_register_static (G_TYPE_OBJECT, "TestObject", &test_object_info, 0);
g_type_add_interface_static (test_object_type, TEST_TYPE_IFACE, &iface_info);
}
return test_object_type;
}
static void
test_object_class_init (TestObjectClass *class)
{
/* GObjectClass *gobject_class = G_OBJECT_CLASS (class); */
class->test_signal = test_object_test_signal;
g_signal_new ("test-signal",
G_OBJECT_CLASS_TYPE (class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST | G_SIGNAL_RUN_CLEANUP,
G_STRUCT_OFFSET (TestObjectClass, test_signal),
test_signal_accumulator, NULL,
g_cclosure_marshal_STRING__OBJECT_POINTER,
G_TYPE_STRING, 2, TEST_TYPE_IFACE, G_TYPE_POINTER);
g_type_class_add_private (class, sizeof (TestObjectPrivate));
}
static void
test_object_init (TestObject *tobject)
{
TestObjectPrivate *priv;
priv = TEST_OBJECT_GET_PRIVATE (tobject);
g_assert (priv);
g_assert ((gchar *)priv >= (gchar *)tobject + sizeof (TestObject));
priv->dummy1 = 54321;
}
/* Check to see if private data initialization in the
* instance init function works.
*/
static void
test_object_check_private_init (TestObject *tobject)
{
TestObjectPrivate *priv;
priv = TEST_OBJECT_GET_PRIVATE (tobject);
g_print ("private data during initialization: %u == %u\n", priv->dummy1, 54321);
g_assert (priv->dummy1 == 54321);
}
static gboolean
test_signal_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer data)
{
gchar *accu_string = g_value_get_string (return_accu);
gchar *new_string = g_value_get_string (handler_return);
gchar *result_string;
if (accu_string)
result_string = g_strconcat (accu_string, new_string, NULL);
else if (new_string)
result_string = g_strdup (new_string);
else
result_string = NULL;
g_value_take_string (return_accu, result_string);
return TRUE;
}
static gchar*
test_object_test_signal (TestObject *tobject,
TestIface *iface_object,
gpointer tdata)
{
g_message ("::test_signal default_handler called");
g_return_val_if_fail (TEST_IS_IFACE (iface_object), NULL);
return g_strdup ("<default_handler>");
}
/* --- TestIface for DerivedObject --- */
static void
print_bar (TestIface *tiobj,
const gchar *string)
{
TestIfaceClass *parent_iface;
g_return_if_fail (TEST_IS_IFACE (tiobj));
if (!string)
string = "<NULL>";
g_print ("Iface-BAR: \"%s\" from %p\n", string, tiobj);
g_print ("chaining: ");
parent_iface = g_type_interface_peek_parent (TEST_IFACE_GET_CLASS (tiobj));
parent_iface->print_string (tiobj, string);
g_assert (g_type_interface_peek_parent (parent_iface) == NULL);
}
static void
derived_object_test_iface_init (gpointer giface,
gpointer iface_data)
{
TestIfaceClass *iface = giface;
g_assert (iface_data == GUINT_TO_POINTER (87));
g_assert (G_TYPE_FROM_INTERFACE (iface) == TEST_TYPE_IFACE);
/* assert test_object_test_iface_init() was already called */
g_assert (iface->print_string == print_foo);
/* override stuff */
iface->print_string = print_bar;
}
/* --- DerivedObject --- */
#define DERIVED_TYPE_OBJECT (derived_object_get_type ())
#define DERIVED_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), DERIVED_TYPE_OBJECT, DerivedObject))
#define DERIVED_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), DERIVED_TYPE_OBJECT, DerivedObjectClass))
#define DERIVED_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), DERIVED_TYPE_OBJECT))
#define DERIVED_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), DERIVED_TYPE_OBJECT))
#define DERIVED_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), DERIVED_TYPE_OBJECT, DerivedObjectClass))
#define DERIVED_OBJECT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), DERIVED_TYPE_OBJECT, DerivedObjectPrivate))
typedef struct _DerivedObject DerivedObject;
typedef struct _TestObjectClass DerivedObjectClass;
typedef struct _DerivedObjectPrivate DerivedObjectPrivate;
struct _DerivedObject
{
TestObject parent_instance;
int dummy1;
int dummy2;
};
struct _DerivedObjectPrivate
{
char dummy;
};
static void derived_object_class_init (DerivedObjectClass *class);
static void derived_object_init (DerivedObject *dobject);
GType
derived_object_get_type (void)
{
static GType derived_object_type = 0;
if (!derived_object_type)
{
static const GTypeInfo derived_object_info =
{
sizeof (DerivedObjectClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) derived_object_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (DerivedObject),
5, /* n_preallocs */
(GInstanceInitFunc) derived_object_init,
};
GInterfaceInfo iface_info = { derived_object_test_iface_init, NULL, GUINT_TO_POINTER (87) };
derived_object_type = g_type_register_static (TEST_TYPE_OBJECT, "DerivedObject", &derived_object_info, 0);
g_type_add_interface_static (derived_object_type, TEST_TYPE_IFACE, &iface_info);
}
return derived_object_type;
}
static void
derived_object_class_init (DerivedObjectClass *class)
{
g_type_class_add_private (class, sizeof (DerivedObjectPrivate));
}
static void
derived_object_init (DerivedObject *dobject)
{
TestObjectPrivate *test_priv;
DerivedObjectPrivate *derived_priv;
derived_priv = DERIVED_OBJECT_GET_PRIVATE (dobject);
g_assert (derived_priv);
g_assert ((gchar *)derived_priv >= (gchar *)TEST_OBJECT_GET_PRIVATE (dobject) + sizeof (TestObjectPrivate));
test_priv = TEST_OBJECT_GET_PRIVATE (dobject);
g_assert (test_priv);
g_assert ((gchar *)test_priv >= (gchar *)dobject + sizeof (TestObject));
}
/* --- main --- */
int
main (int argc,
char *argv[])
{
GTypeInfo info = { 0, };
GTypeFundamentalInfo finfo = { 0, };
GType type;
TestObject *sigarg;
DerivedObject *dobject;
TestObjectPrivate *priv;
gchar *string = NULL;
g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
G_LOG_LEVEL_WARNING |
G_LOG_LEVEL_CRITICAL);
g_type_init_with_debug_flags (G_TYPE_DEBUG_OBJECTS | G_TYPE_DEBUG_SIGNALS);
/* test new fundamentals */
g_assert (G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST) == g_type_fundamental_next ());
type = g_type_register_fundamental (g_type_fundamental_next (), "FooShadow1", &info, &finfo, 0);
g_assert (G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST + 1) == g_type_fundamental_next ());
type = g_type_register_fundamental (g_type_fundamental_next (), "FooShadow2", &info, &finfo, 0);
g_assert (G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST + 2) == g_type_fundamental_next ());
g_assert (g_type_from_name ("FooShadow1") == G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST));
g_assert (g_type_from_name ("FooShadow2") == G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST + 1));
/* to test past class initialization interface setups, create the class here */
g_type_class_ref (TEST_TYPE_OBJECT);
dobject = g_object_new (DERIVED_TYPE_OBJECT, NULL);
test_object_check_private_init (TEST_OBJECT (dobject));
sigarg = g_object_new (TEST_TYPE_OBJECT, NULL);
g_print ("MAIN: emit test-signal:\n");
g_signal_emit_by_name (dobject, "test-signal", sigarg, NULL, &string);
g_message ("signal return: \"%s\"", string);
g_assert (strcmp (string, "<default_handler><default_handler>") == 0);
g_free (string);
g_print ("MAIN: call iface print-string on test and derived object:\n");
iface_print_string (TEST_IFACE (sigarg), "iface-string-from-test-type");
iface_print_string (TEST_IFACE (dobject), "iface-string-from-derived-type");
priv = TEST_OBJECT_GET_PRIVATE (dobject);
g_print ("private data after initialization: %u == %u\n", priv->dummy1, 54321);
g_assert (priv->dummy1 == 54321);
g_object_unref (sigarg);
g_object_unref (dobject);
g_message ("%s done", argv[0]);
return 0;
}