river-status: implement protocol

river/XwaylandView.zig

@@ -105,6 +105,11 @@ pub fn surfaceAt(self: Self, ox: f64, oy: f64, sx: *f64, sy: *f64) ?*c.wlr_surfa
     );
 }
 
+/// Get the current title of the xwayland surface. May be an empty string
+pub fn getTitle(self: Self) [*:0]const u8 {
+    return self.wlr_xwayland_surface.title;
+}
+
 /// Called when the xwayland surface is destroyed
 fn handleDestroy(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
     const self = @fieldParentPtr(Self, "listen_destroy", listener.?);