Handle set_{title,app_id} for xdg-shell and zxdg-shell-v6

This allows to update the title even if the view doesn't commit.
This is useful e.g. when a terminal sets its toplevel title to
the currently running command and when the view isn't visible.

include/sway/tree/view.h

@@ -110,6 +110,8 @@ struct sway_xdg_shell_v6_view {
 	struct wl_listener request_resize;
 	struct wl_listener request_maximize;
 	struct wl_listener request_fullscreen;
+	struct wl_listener set_title;
+	struct wl_listener set_app_id;
 	struct wl_listener new_popup;
 	struct wl_listener map;
 	struct wl_listener unmap;
@@ -124,6 +126,8 @@ struct sway_xdg_shell_view {
 	struct wl_listener request_resize;
 	struct wl_listener request_maximize;
 	struct wl_listener request_fullscreen;
+	struct wl_listener set_title;
+	struct wl_listener set_app_id;
 	struct wl_listener new_popup;
 	struct wl_listener map;
 	struct wl_listener unmap;

sway/desktop/xdg_shell.c

@@ -225,10 +225,24 @@ static void handle_commit(struct wl_listener *listener, void *data) {
 		transaction_notify_view_ready(view, xdg_surface->configure_serial);
 	}
 
-	view_update_title(view, false);
 	view_damage_from(view);
 }
 
+static void handle_set_title(struct wl_listener *listener, void *data) {
+	struct sway_xdg_shell_view *xdg_shell_view =
+		wl_container_of(listener, xdg_shell_view, set_title);
+	struct sway_view *view = &xdg_shell_view->view;
+	view_update_title(view, false);
+	view_execute_criteria(view);
+}
+
+static void handle_set_app_id(struct wl_listener *listener, void *data) {
+	struct sway_xdg_shell_view *xdg_shell_view =
+		wl_container_of(listener, xdg_shell_view, set_app_id);
+	struct sway_view *view = &xdg_shell_view->view;
+	view_execute_criteria(view);
+}
+
 static void handle_new_popup(struct wl_listener *listener, void *data) {
 	struct sway_xdg_shell_view *xdg_shell_view =
 		wl_container_of(listener, xdg_shell_view, new_popup);
@@ -304,6 +318,8 @@ static void handle_unmap(struct wl_listener *listener, void *data) {
 	wl_list_remove(&xdg_shell_view->request_fullscreen.link);
 	wl_list_remove(&xdg_shell_view->request_move.link);
 	wl_list_remove(&xdg_shell_view->request_resize.link);
+	wl_list_remove(&xdg_shell_view->set_title.link);
+	wl_list_remove(&xdg_shell_view->set_app_id.link);
 }
 
 static void handle_map(struct wl_listener *listener, void *data) {
@@ -349,6 +365,14 @@ static void handle_map(struct wl_listener *listener, void *data) {
 	xdg_shell_view->request_resize.notify = handle_request_resize;
 	wl_signal_add(&xdg_surface->toplevel->events.request_resize,
 			&xdg_shell_view->request_resize);
+
+	xdg_shell_view->set_title.notify = handle_set_title;
+	wl_signal_add(&xdg_surface->toplevel->events.set_title,
+			&xdg_shell_view->set_title);
+
+	xdg_shell_view->set_app_id.notify = handle_set_app_id;
+	wl_signal_add(&xdg_surface->toplevel->events.set_app_id,
+			&xdg_shell_view->set_app_id);
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {

sway/desktop/xdg_shell_v6.c

@@ -220,10 +220,24 @@ static void handle_commit(struct wl_listener *listener, void *data) {
 		transaction_notify_view_ready(view, xdg_surface_v6->configure_serial);
 	}
 
-	view_update_title(view, false);
 	view_damage_from(view);
 }
 
+static void handle_set_title(struct wl_listener *listener, void *data) {
+	struct sway_xdg_shell_v6_view *xdg_shell_v6_view =
+		wl_container_of(listener, xdg_shell_v6_view, set_title);
+	struct sway_view *view = &xdg_shell_v6_view->view;
+	view_update_title(view, false);
+	view_execute_criteria(view);
+}
+
+static void handle_set_app_id(struct wl_listener *listener, void *data) {
+	struct sway_xdg_shell_v6_view *xdg_shell_v6_view =
+		wl_container_of(listener, xdg_shell_v6_view, set_app_id);
+	struct sway_view *view = &xdg_shell_v6_view->view;
+	view_execute_criteria(view);
+}
+
 static void handle_new_popup(struct wl_listener *listener, void *data) {
 	struct sway_xdg_shell_v6_view *xdg_shell_v6_view =
 		wl_container_of(listener, xdg_shell_v6_view, new_popup);
@@ -299,6 +313,8 @@ static void handle_unmap(struct wl_listener *listener, void *data) {
 	wl_list_remove(&xdg_shell_v6_view->request_fullscreen.link);
 	wl_list_remove(&xdg_shell_v6_view->request_move.link);
 	wl_list_remove(&xdg_shell_v6_view->request_resize.link);
+	wl_list_remove(&xdg_shell_v6_view->set_title.link);
+	wl_list_remove(&xdg_shell_v6_view->set_app_id.link);
 }
 
 static void handle_map(struct wl_listener *listener, void *data) {
@@ -344,6 +360,14 @@ static void handle_map(struct wl_listener *listener, void *data) {
 	xdg_shell_v6_view->request_resize.notify = handle_request_resize;
 	wl_signal_add(&xdg_surface->toplevel->events.request_resize,
 			&xdg_shell_v6_view->request_resize);
+
+	xdg_shell_v6_view->set_title.notify = handle_set_title;
+	wl_signal_add(&xdg_surface->toplevel->events.set_title,
+			&xdg_shell_v6_view->set_title);
+
+	xdg_shell_v6_view->set_app_id.notify = handle_set_app_id;
+	wl_signal_add(&xdg_surface->toplevel->events.set_app_id,
+			&xdg_shell_v6_view->set_app_id);
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {