input: add basic touch support

niri-config/src/lib.rs

@@ -62,6 +62,8 @@ pub struct Input {
     pub trackpoint: Trackpoint,
     #[knuffel(child, default)]
     pub tablet: Tablet,
+    #[knuffel(child, default)]
+    pub touch: Touch,
     #[knuffel(child)]
     pub disable_power_key_handling: bool,
 }
@@ -201,6 +203,12 @@ pub struct Tablet {
     pub map_to_output: Option<String>,
 }
 
+#[derive(knuffel::Decode, Debug, Default, PartialEq)]
+pub struct Touch {
+    #[knuffel(child, unwrap(argument))]
+    pub map_to_output: Option<String>,
+}
+
 #[derive(knuffel::Decode, Debug, Clone, PartialEq)]
 pub struct Output {
     #[knuffel(child)]
@@ -1092,6 +1100,10 @@ mod tests {
                     map-to-output "eDP-1"
                 }
 
+                touch {
+                    map-to-output "eDP-1"
+                }
+
                 disable-power-key-handling
             }
 
@@ -1223,6 +1235,9 @@ mod tests {
                     tablet: Tablet {
                         map_to_output: Some("eDP-1".to_owned()),
                     },
+                    touch: Touch {
+                        map_to_output: Some("eDP-1".to_owned()),
+                    },
                     disable_power_key_handling: true,
                 },
                 outputs: vec![Output {