ivi-shell: add input panel label func

Copied from desktop-shell/input-panel.c, add a label function for the
input panel.

This patch strictly reduces the difference between input-panel.c and
input-panel-ivi.c.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Eugen Friedrich <friedrix@gmail.com>

ivi-shell/input-panel-ivi.c

@@ -157,6 +157,12 @@ update_input_panels(struct wl_listener *listener, void *data)
 	memcpy(&shell->text_input.cursor_rectangle, data, sizeof(pixman_box32_t));
 }
 
+static int
+input_panel_get_label(struct weston_surface *surface, char *buf, size_t len)
+{
+	return snprintf(buf, len, "input panel");
+}
+
 static void
 input_panel_configure(struct weston_surface *surface, int32_t sx, int32_t sy)
 {
@@ -194,6 +200,7 @@ destroy_input_panel_surface(struct input_panel_surface *input_panel_surface)
 	wl_list_remove(&input_panel_surface->link);
 
 	input_panel_surface->surface->configure = NULL;
+	weston_surface_set_label_func(input_panel_surface->surface, NULL);
 	weston_view_destroy(input_panel_surface->view);
 
 	free(input_panel_surface);
@@ -235,6 +242,7 @@ create_input_panel_surface(struct ivi_shell *shell,
 
 	surface->configure = input_panel_configure;
 	surface->configure_private = input_panel_surface;
+	weston_surface_set_label_func(surface, input_panel_get_label);
 
 	input_panel_surface->shell = shell;