config: add visibility window criteria

jay-config/src/_private.rs

@@ -111,6 +111,7 @@ pub enum WindowCriterionIpc {
     Types(WindowType),
     Client(ClientMatcher),
     Floating,
+    Visible,
 }
 
 #[derive(Serialize, Deserialize, Clone, Debug, Hash, Eq, PartialEq)]

jay-config/src/_private/client.rs

@@ -1658,6 +1658,7 @@ impl ConfigClient {
             WindowCriterion::AppId(t) => string!(t, AppId, false),
             WindowCriterion::AppIdRegex(t) => string!(t, AppId, true),
             WindowCriterion::Floating => WindowCriterionIpc::Floating,
+            WindowCriterion::Visible => WindowCriterionIpc::Visible,
         };
         let res = self.send_with_response(&ClientMessage::CreateWindowMatcher { criterion });
         get_response!(

jay-config/src/window.rs

@@ -246,6 +246,8 @@ pub enum WindowCriterion<'a> {
     AppIdRegex(&'a str),
     /// Matches if the window is floating.
     Floating,
+    /// Matches if the window is visible.
+    Visible,
 }
 
 impl WindowCriterion<'_> {