Add focus history and Alt-Tab window switching

compositor/src/config.rs

@@ -438,6 +438,43 @@ mod tests {
         assert!(Config::parse_source("workspaces {\n auto-back-and-forth \"yes\"\n}\n").is_err());
     }
 
+    #[test]
+    fn focus_history_actions_are_bindable_and_have_defaults() {
+        let defaults = Config::default().runtime_config().unwrap();
+        for action in [
+            BindingAction::FocusLastWindow,
+            BindingAction::FocusMru(false),
+            BindingAction::FocusMru(true),
+        ] {
+            assert!(defaults.bindings.iter().any(|binding| binding.action == action));
+        }
+        for (name, action) in [
+            ("focus-last-window", BindingAction::FocusLastWindow),
+            ("focus-mru-next", BindingAction::FocusMru(false)),
+            ("focus-mru-previous", BindingAction::FocusMru(true)),
+        ] {
+            assert_eq!(parse_action(name, None, &HashMap::new()).unwrap(), action);
+            assert!(parse_action(name, Some("left"), &HashMap::new()).is_err());
+        }
+        let bindings = &defaults.bindings;
+        assert!(bindings.iter().any(|binding| binding.matches(
+            23_u32.into(),
+            &[keysyms::KEY_Tab],
+            false,
+            false,
+            true,
+            false
+        ) && binding.action == BindingAction::FocusMru(false)));
+        assert!(bindings.iter().any(|binding| binding.matches(
+            23_u32.into(),
+            &[keysyms::KEY_Tab],
+            false,
+            false,
+            true,
+            true
+        ) && binding.action == BindingAction::FocusMru(true)));
+    }
+
     #[test]
     fn packaged_and_custom_kdl_pass_runtime_validation() {
         Config::parse_source(include_str!("../../packaging/config.kdl"))
@@ -888,7 +925,7 @@ mod tests {
         let input = config.input_settings().unwrap();
         let bindings = config.bindings(&input).unwrap();
 
-        assert_eq!(bindings.len(), 50);
+        assert_eq!(bindings.len(), 53);
         for (shift, action) in [
             (false, BindingAction::ToggleMaximized),
             (true, BindingAction::ToggleFullscreen),
@@ -931,14 +968,14 @@ mod tests {
 
         let input = replaced.input_settings().unwrap();
         let bindings = replaced.bindings(&input).unwrap();
-        assert_eq!(bindings.len(), 50);
+        assert_eq!(bindings.len(), 53);
         assert!(bindings.iter().any(|binding| {
             binding.action == BindingAction::Spawn(vec!["foot".to_owned(), "--app-id".to_owned(), "work".to_owned()])
         }));
 
         let input = unbound.input_settings().unwrap();
         let bindings = unbound.bindings(&input).unwrap();
-        assert_eq!(bindings.len(), 49);
+        assert_eq!(bindings.len(), 52);
         assert!(!bindings.iter().any(|binding| binding.action == BindingAction::Close));
     }