ivi-shell: add new method to remove a callback to get notificaiton of ivi_layer property changes.

To get property changes of ivi_layer, callbacks can be registered.
However there was no API to remove a callback rather than removing all
callbacks by using layer_remove_notification.
layer_remove_notification_by_callback can do it.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

ivi-shell/ivi-layout-export.h

@@ -790,6 +790,13 @@ struct ivi_controller_interface {
 							surface_property_notification_func callback,
 							void *userdata);
 
+	/**
+	 * \brief remove notification by callback on property changes of ivi_layer
+	 */
+	void (*layer_remove_notification_by_callback)(struct ivi_layout_layer *ivilayer,
+						      layer_property_notification_func callback,
+						      void *userdata);
+
 };
 
 #ifdef __cplusplus

ivi-shell/ivi-layout.c

@@ -1882,6 +1882,19 @@ ivi_layout_layer_remove_notification(struct ivi_layout_layer *ivilayer)
 	remove_all_notification(&ivilayer->property_changed.listener_list);
 }
 
+static void
+ivi_layout_layer_remove_notification_by_callback(struct ivi_layout_layer *ivilayer,
+						 layer_property_notification_func callback,
+						 void *userdata)
+{
+	if (ivilayer == NULL) {
+		weston_log("ivi_layout_layer_remove_notification_by_callback: invalid argument\n");
+		return;
+	}
+
+	remove_notification(&ivilayer->property_changed.listener_list, callback, userdata);
+}
+
 static void
 ivi_layout_layer_remove(struct ivi_layout_layer *ivilayer)
 {
@@ -2982,9 +2995,10 @@ static struct ivi_controller_interface ivi_controller_interface = {
 	.surface_dump			= ivi_layout_surface_dump,
 
 	/**
-	 * remove notification by callback on property changes of ivi_surface
+	 * remove notification by callback on property changes of ivi_surface/layer
 	 */
-	.surface_remove_notification_by_callback	= ivi_layout_surface_remove_notification_by_callback
+	.surface_remove_notification_by_callback	= ivi_layout_surface_remove_notification_by_callback,
+	.layer_remove_notification_by_callback		= ivi_layout_layer_remove_notification_by_callback
 };
 
 int