config: add xwayland client criteria

src/criteria/clm/clm_matchers.rs

@@ -17,6 +17,7 @@ macro_rules! fixed_root_criterion {
     };
 }
 
+pub mod clmm_is_xwayland;
 pub mod clmm_pid;
 pub mod clmm_sandboxed;
 pub mod clmm_string;

src/criteria/clm/clm_matchers/clmm_is_xwayland.rs

@@ -0,0 +1,14 @@
+use {
+    crate::{client::Client, criteria::crit_graph::CritFixedRootCriterion},
+    std::rc::Rc,
+};
+
+pub struct ClmMatchIsXwayland(pub bool);
+
+fixed_root_criterion!(ClmMatchIsXwayland, is_xwayland);
+
+impl CritFixedRootCriterion<Rc<Client>> for ClmMatchIsXwayland {
+    fn matches(&self, data: &Rc<Client>) -> bool {
+        data.is_xwayland
+    }
+}