gobject.c

嵌入式下基于MiniGUI的Web Browser

	  g_warning ("%s: %s", G_STRLOC, error);
	  g_free (error);
	  
	  /* we purposely leak the value here, it might not be
	   * in a sane state if an error condition occoured
	   */
	  break;
	}
      
      object_set_property (object, pspec, &value, nqueue);
      g_value_unset (&value);
      
      name = va_arg (var_args, gchar*);
    }

  g_object_notify_queue_thaw (object, nqueue);
  g_object_unref (object);
}

void
g_object_get_valist (GObject	 *object,
		     const gchar *first_property_name,
		     va_list	  var_args)
{
  const gchar *name;
  
  g_return_if_fail (G_IS_OBJECT (object));
  
  g_object_ref (object);
  
  name = first_property_name;
  
  while (name)
    {
      GValue value = { 0, };
      GParamSpec *pspec;
      gchar *error;
      
      pspec = g_param_spec_pool_lookup (pspec_pool,
					name,
					G_OBJECT_TYPE (object),
					TRUE);
      if (!pspec)
	{
	  g_warning ("%s: object class `%s' has no property named `%s'",
		     G_STRLOC,
		     G_OBJECT_TYPE_NAME (object),
		     name);
	  break;
	}
      if (!(pspec->flags & G_PARAM_READABLE))
	{
	  g_warning ("%s: property `%s' of object class `%s' is not readable",
		     G_STRLOC,
		     pspec->name,
		     G_OBJECT_TYPE_NAME (object));
	  break;
	}
      
      g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
      
      object_get_property (object, pspec, &value);
      
      G_VALUE_LCOPY (&value, var_args, 0, &error);
      if (error)
	{
	  g_warning ("%s: %s", G_STRLOC, error);
	  g_free (error);
	  g_value_unset (&value);
	  break;
	}
      
      g_value_unset (&value);
      
      name = va_arg (var_args, gchar*);
    }
  
  g_object_unref (object);
}

void
g_object_set (gpointer     _object,
	      const gchar *first_property_name,
	      ...)
{
  GObject *object = _object;
  va_list var_args;
  
  g_return_if_fail (G_IS_OBJECT (object));
  
  va_start (var_args, first_property_name);
  g_object_set_valist (object, first_property_name, var_args);
  va_end (var_args);
}

void
g_object_get (gpointer     _object,
	      const gchar *first_property_name,
	      ...)
{
  GObject *object = _object;
  va_list var_args;
  
  g_return_if_fail (G_IS_OBJECT (object));
  
  va_start (var_args, first_property_name);
  g_object_get_valist (object, first_property_name, var_args);
  va_end (var_args);
}

void
g_object_set_property (GObject	    *object,
		       const gchar  *property_name,
		       const GValue *value)
{
  GObjectNotifyQueue *nqueue;
  GParamSpec *pspec;
  
  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (property_name != NULL);
  g_return_if_fail (G_IS_VALUE (value));
  
  g_object_ref (object);
  nqueue = g_object_notify_queue_freeze (object, &property_notify_context);
  
  pspec = g_param_spec_pool_lookup (pspec_pool,
				    property_name,
				    G_OBJECT_TYPE (object),
				    TRUE);
  if (!pspec)
    g_warning ("%s: object class `%s' has no property named `%s'",
	       G_STRLOC,
	       G_OBJECT_TYPE_NAME (object),
	       property_name);
  else
    object_set_property (object, pspec, value, nqueue);
  
  g_object_notify_queue_thaw (object, nqueue);
  g_object_unref (object);
}

void
g_object_get_property (GObject	   *object,
		       const gchar *property_name,
		       GValue	   *value)
{
  GParamSpec *pspec;
  
  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (property_name != NULL);
  g_return_if_fail (G_IS_VALUE (value));
  
  g_object_ref (object);
  
  pspec = g_param_spec_pool_lookup (pspec_pool,
				    property_name,
				    G_OBJECT_TYPE (object),
				    TRUE);
  if (!pspec)
    g_warning ("%s: object class `%s' has no property named `%s'",
	       G_STRLOC,
	       G_OBJECT_TYPE_NAME (object),
	       property_name);
  else
    {
      GValue *prop_value, tmp_value = { 0, };
      
      /* auto-conversion of the callers value type
       */
      if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
	{
	  g_value_reset (value);
	  prop_value = value;
	}
      else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
	{
	  g_warning ("can't retrieve property `%s' of type `%s' as value of type `%s'",
		     pspec->name,
		     g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
		     G_VALUE_TYPE_NAME (value));
	  g_object_unref (object);
	  return;
	}
      else
	{
	  g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
	  prop_value = &tmp_value;
	}
      object_get_property (object, pspec, prop_value);
      if (prop_value != value)
	{
	  g_value_transform (prop_value, value);
	  g_value_unset (&tmp_value);
	}
    }
  
  g_object_unref (object);
}

gpointer
g_object_connect (gpointer     _object,
		  const gchar *signal_spec,
		  ...)
{
  GObject *object = _object;
  va_list var_args;

  g_return_val_if_fail (G_IS_OBJECT (object), NULL);
  g_return_val_if_fail (object->ref_count > 0, object);

  va_start (var_args, signal_spec);
  while (signal_spec)
    {
      GCallback callback = va_arg (var_args, GCallback);
      gpointer data = va_arg (var_args, gpointer);
      gulong sid;

      if (strncmp (signal_spec, "signal::", 8) == 0)
	sid = g_signal_connect_data (object, signal_spec + 8,
				     callback, data, NULL,
				     0);
      else if (strncmp (signal_spec, "object_signal::", 15) == 0)
	sid = g_signal_connect_object (object, signal_spec + 15,
				       callback, data,
				       0);
      else if (strncmp (signal_spec, "swapped_signal::", 16) == 0)
	sid = g_signal_connect_data (object, signal_spec + 16,
				     callback, data, NULL,
				     G_CONNECT_SWAPPED);
      else if (strncmp (signal_spec, "swapped_object_signal::", 23) == 0)
	sid = g_signal_connect_object (object, signal_spec + 23,
				       callback, data,
				       G_CONNECT_SWAPPED);
      else if (strncmp (signal_spec, "signal_after::", 14) == 0)
	sid = g_signal_connect_data (object, signal_spec + 14,
				     callback, data, NULL,
				     G_CONNECT_AFTER);
      else if (strncmp (signal_spec, "object_signal_after::", 21) == 0)
	sid = g_signal_connect_object (object, signal_spec + 21,
				       callback, data,
				       G_CONNECT_AFTER);
      else if (strncmp (signal_spec, "swapped_signal_after::", 22) == 0)
	sid = g_signal_connect_data (object, signal_spec + 22,
				     callback, data, NULL,
				     G_CONNECT_SWAPPED | G_CONNECT_AFTER);
      else if (strncmp (signal_spec, "swapped_object_signal_after::", 29) == 0)
	sid = g_signal_connect_object (object, signal_spec + 29,
				       callback, data,
				       G_CONNECT_SWAPPED | G_CONNECT_AFTER);
      else
	{
	  g_warning ("%s: invalid signal spec \"%s\"", G_STRLOC, signal_spec);
	  break;
	}
      signal_spec = va_arg (var_args, gchar*);
    }
  va_end (var_args);

  return object;
}

void
g_object_disconnect (gpointer     _object,
		     const gchar *signal_spec,
		     ...)
{
  GObject *object = _object;
  va_list var_args;

  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (object->ref_count > 0);

  va_start (var_args, signal_spec);
  while (signal_spec)
    {
      GCallback callback = va_arg (var_args, GCallback);
      gpointer data = va_arg (var_args, gpointer);
      guint sid = 0, detail = 0, mask = 0;

      if (strncmp (signal_spec, "any_signal::", 12) == 0)
	{
	  signal_spec += 12;
	  mask = G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA;
	}
      else if (strcmp (signal_spec, "any_signal") == 0)
	{
	  signal_spec += 10;
	  mask = G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA;
	}
      else
	{
	  g_warning ("%s: invalid signal spec \"%s\"", G_STRLOC, signal_spec);
	  break;
	}

      if ((mask & G_SIGNAL_MATCH_ID) &&
	  !g_signal_parse_name (signal_spec, G_OBJECT_TYPE (object), &sid, &detail, FALSE))
	g_warning ("%s: invalid signal name \"%s\"", G_STRLOC, signal_spec);
      else if (!g_signal_handlers_disconnect_matched (object, mask | (detail ? G_SIGNAL_MATCH_DETAIL : 0),
						      sid, detail,
						      NULL, (gpointer)callback, data))
	g_warning (G_STRLOC ": signal handler %p(%p) is not connected", callback, data);
      signal_spec = va_arg (var_args, gchar*);
    }
  va_end (var_args);
}

typedef struct {
  GObject *object;
  guint n_weak_refs;
  struct {
    GWeakNotify notify;
    gpointer    data;
  } weak_refs[1];  /* flexible array */
} WeakRefStack;

static void
weak_refs_notify (gpointer data)
{
  WeakRefStack *wstack = data;
  guint i;

  for (i = 0; i < wstack->n_weak_refs; i++)
    wstack->weak_refs[i].notify (wstack->weak_refs[i].data, wstack->object);
  g_free (wstack);
}

void
g_object_weak_ref (GObject    *object,
		   GWeakNotify notify,
		   gpointer    data)
{
  WeakRefStack *wstack;
  guint i;
  
  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (notify != NULL);
  g_return_if_fail (object->ref_count >= 1);

  wstack = g_datalist_id_remove_no_notify (&object->qdata, quark_weak_refs);
  if (wstack)
    {
      i = wstack->n_weak_refs++;
      wstack = g_realloc (wstack, sizeof (*wstack) + sizeof (wstack->weak_refs[0]) * i);
    }
  else
    {
      wstack = g_renew (WeakRefStack, NULL, 1);
      wstack->object = object;
      wstack->n_weak_refs = 1;
      i = 0;
    }
  wstack->weak_refs[i].notify = notify;
  wstack->weak_refs[i].data = data;
  g_datalist_id_set_data_full (&object->qdata, quark_weak_refs, wstack, weak_refs_notify);
}

void
g_object_weak_unref (GObject    *object,
		     GWeakNotify notify,
		     gpointer    data)
{
  WeakRefStack *wstack;
  gboolean found_one = FALSE;

  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (notify != NULL);

  wstack = g_datalist_id_get_data (&object->qdata, quark_weak_refs);
  if (wstack)
    {
      guint i;

      for (i = 0; i < wstack->n_weak_refs; i++)
	if (wstack->weak_refs[i].notify == notify &&
	    wstack->weak_refs[i].data == data)
	  {
	    found_one = TRUE;
	    wstack->n_weak_refs -= 1;
	    if (i != wstack->n_weak_refs)
	      {
		wstack->weak_refs[i].notify = wstack->weak_refs[wstack->n_weak_refs].notify;
		wstack->weak_refs[i].data = wstack->weak_refs[wstack->n_weak_refs].data;
	      }
	    break;
	  }
    }
  if (!found_one)
    g_warning (G_STRLOC ": couldn't find weak ref %p(%p)", notify, data);
}

void
g_object_add_weak_pointer (GObject  *object, 
                           gpointer *weak_pointer_location)
{
  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (weak_pointer_location != NULL);

  g_object_weak_ref (object, 
                     (GWeakNotify) g_nullify_pointer, 
                     weak_pointer_location);
}

void
g_object_remove_weak_pointer (GObject  *object, 
                              gpointer *weak_pointer_location)
{
  g_return_if_fail (G_IS_OBJECT (object));
  g_return_if_fail (weak_pointer_location != NULL);

  g_object_weak_unref (object, 
                       (GWeakNotify) g_nullify_pointer, 
                       weak_pointer_location);
}

gpointer
g_object_ref (gpointer _object)
{
  GObject *object = _object;

  g_return_val_if_fail (G_IS_OBJECT (object), NULL);
  g_return_val_if_fail (object->ref_count > 0, NULL);
  
#ifdef  G_ENABLE_DEBUG
  if (g_trap_object_ref == object)
    G_BREAKPOINT ();
#endif  /* G_ENABLE_DEBUG */

  object->ref_count += 1;
  
  return object;
}

void