glib/gobject/tests/properties.c

#include <stdlib.h>
#include <gstdio.h>
#include <glib-object.h>

typedef struct _TestObject {
  GObject parent_instance;
  gint foo;
  gboolean bar;
  gchar *baz;
} TestObject;

typedef struct _TestObjectClass {
  GObjectClass parent_class;
} TestObjectClass;

enum { PROP_0, PROP_FOO, PROP_BAR, PROP_BAZ, N_PROPERTIES };

static GParamSpec *properties[N_PROPERTIES] = { NULL, };

G_DEFINE_TYPE (TestObject, test_object, G_TYPE_OBJECT);

static void
test_object_set_foo (TestObject *obj,
                     gint        foo)
{
  if (obj->foo != foo)
    {
      obj->foo = foo;

      g_assert (properties[PROP_FOO] != NULL);
      g_object_notify_by_pspec (G_OBJECT (obj), properties[PROP_FOO]);
    }
}

static void
test_object_set_bar (TestObject *obj,
                     gboolean    bar)
{
  bar = !!bar;

  if (obj->bar != bar)
    {
      obj->bar = bar;

      g_assert (properties[PROP_BAR] != NULL);
      g_object_notify_by_pspec (G_OBJECT (obj), properties[PROP_BAR]);
    }
}

static void
test_object_set_baz (TestObject  *obj,
                     const gchar *baz)
{
  if (g_strcmp0 (obj->baz, baz) != 0)
    {
      g_free (obj->baz);
      obj->baz = g_strdup (baz);

      g_assert (properties[PROP_BAZ] != NULL);
      g_object_notify_by_pspec (G_OBJECT (obj), properties[PROP_BAZ]);
    }
}

static void
test_object_finalize (GObject *gobject)
{
  g_free (((TestObject *) gobject)->baz);

  G_OBJECT_CLASS (test_object_parent_class)->finalize (gobject);
}

static void
test_object_set_property (GObject *gobject,
                          guint prop_id,
                          const GValue *value,
                          GParamSpec *pspec)
{
  TestObject *tobj = (TestObject *) gobject;

  g_assert_cmpint (prop_id, !=, 0);
  g_assert_cmpint (prop_id, !=, N_PROPERTIES);
  g_assert (pspec == properties[prop_id]);

  switch (prop_id)
    {
    case PROP_FOO:
      test_object_set_foo (tobj, g_value_get_int (value));
      break;

    case PROP_BAR:
      test_object_set_bar (tobj, g_value_get_boolean (value));
      break;

    case PROP_BAZ:
      test_object_set_baz (tobj, g_value_get_string (value));
      break;

    default:
      g_assert_not_reached ();
    }
}

static void
test_object_get_property (GObject *gobject,
                          guint prop_id,
                          GValue *value,
                          GParamSpec *pspec)
{
  TestObject *tobj = (TestObject *) gobject;

  g_assert_cmpint (prop_id, !=, 0);
  g_assert_cmpint (prop_id, !=, N_PROPERTIES);
  g_assert (pspec == properties[prop_id]);

  switch (prop_id)
    {
    case PROP_FOO:
      g_value_set_int (value, tobj->foo);
      break;

    case PROP_BAR:
      g_value_set_boolean (value, tobj->bar);
      break;

    case PROP_BAZ:
      g_value_set_string (value, tobj->baz);
      break;

    default:
      g_assert_not_reached ();
    }
}

static void
test_object_class_init (TestObjectClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "Foo",
                                           -1, G_MAXINT,
                                           0,
                                           G_PARAM_READWRITE);
  properties[PROP_BAR] = g_param_spec_boolean ("bar", "Bar", "Bar",
                                               FALSE,
                                               G_PARAM_READWRITE);
  properties[PROP_BAZ] = g_param_spec_string ("baz", "Baz", "Baz",
                                              NULL,
                                              G_PARAM_READWRITE);

  gobject_class->set_property = test_object_set_property;
  gobject_class->get_property = test_object_get_property;
  gobject_class->finalize = test_object_finalize;

  g_object_class_install_properties (gobject_class, N_PROPERTIES, properties);
}

static void
test_object_init (TestObject *self)
{
  self->foo = 42;
  self->bar = TRUE;
  self->baz = g_strdup ("Hello");
}

static void
properties_install (void)
{
  TestObject *obj = g_object_new (test_object_get_type (), NULL);
  GParamSpec *pspec;

  g_assert (properties[PROP_FOO] != NULL);

  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (obj), "foo");
  g_assert (properties[PROP_FOO] == pspec);

  g_object_unref (obj);
}

typedef struct {
  const gchar *name;
  GParamSpec *pspec;
} TestNotifyClosure;

static void
on_notify (GObject           *gobject,
           GParamSpec        *pspec,
           TestNotifyClosure *clos)
{
  g_assert (clos->pspec == pspec);
  g_assert_cmpstr (clos->name, ==, pspec->name);
}

static void
properties_notify (void)
{
  TestObject *obj = g_object_new (test_object_get_type (), NULL);
  TestNotifyClosure clos;

  g_assert (properties[PROP_FOO] != NULL);

  clos.name = "foo";
  clos.pspec = properties[PROP_FOO];

  g_signal_connect (obj, "notify", G_CALLBACK (on_notify), &clos);
  g_object_set (obj, "foo", 47, NULL);

  g_object_unref (obj);
}

int
main (int argc, char *argv[])
{
  g_type_init ();
  g_test_init (&argc, &argv, NULL);

  g_test_bug_base ("http://bugzilla.gnome.org/");

  g_test_add_func ("/properties/install", properties_install);
  g_test_add_func ("/properties/notify", properties_notify);

  return g_test_run ();
}