rootston: add support for foreign-toplevel fullscreening

include/rootston/view.h

@@ -67,6 +67,7 @@ struct roots_view {
 	struct wlr_foreign_toplevel_handle_v1 *toplevel_handle;
 	struct wl_listener toplevel_handle_request_maximize;
 	struct wl_listener toplevel_handle_request_activate;
+	struct wl_listener toplevel_handle_request_fullscreen;
 	struct wl_listener toplevel_handle_request_close;
 
 	struct wl_listener new_subsurface;

rootston/view.c

@@ -273,6 +273,11 @@ void view_set_fullscreen(struct roots_view *view, bool fullscreen,
 		view->impl->set_fullscreen(view, fullscreen);
 	}
 
+	if (view->toplevel_handle) {
+		wlr_foreign_toplevel_handle_v1_set_fullscreen(view->toplevel_handle,
+				fullscreen);
+	}
+
 	if (!was_fullscreen && fullscreen) {
 		if (output == NULL) {
 			output = view_get_output(view);
@@ -641,6 +646,14 @@ static void handle_toplevel_handle_request_activate(struct wl_listener *listener
 	}
 }
 
+static void handle_toplevel_handle_request_fullscreen(struct wl_listener *listener,
+		void *data)  {
+	struct roots_view *view =
+		wl_container_of(listener, view, toplevel_handle_request_fullscreen);
+	struct wlr_foreign_toplevel_handle_v1_fullscreen_event *event = data;
+	view_set_fullscreen(view, event->fullscreen, event->output);
+}
+
 static void handle_toplevel_handle_request_close(struct wl_listener *listener,
 		void *data) {
 	struct roots_view *view =
@@ -661,6 +674,10 @@ void view_create_foreign_toplevel_handle(struct roots_view *view) {
 		handle_toplevel_handle_request_activate;
 	wl_signal_add(&view->toplevel_handle->events.request_activate,
 			&view->toplevel_handle_request_activate);
+	view->toplevel_handle_request_fullscreen.notify =
+		handle_toplevel_handle_request_fullscreen;
+	wl_signal_add(&view->toplevel_handle->events.request_fullscreen,
+			&view->toplevel_handle_request_fullscreen);
 	view->toplevel_handle_request_close.notify =
 		handle_toplevel_handle_request_close;
 	wl_signal_add(&view->toplevel_handle->events.request_close,