Add touchpad tap-button-map setting

niri-config/src/lib.rs

@@ -114,6 +114,8 @@ pub struct Touchpad {
     pub accel_speed: f64,
     #[knuffel(child, unwrap(argument, str))]
     pub accel_profile: Option<AccelProfile>,
+    #[knuffel(child, unwrap(argument, str))]
+    pub tap_button_map: Option<TapButtonMap>,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -131,6 +133,21 @@ impl From<AccelProfile> for input::AccelProfile {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum TapButtonMap {
+    LeftRightMiddle,
+    LeftMiddleRight,
+}
+
+impl From<TapButtonMap> for input::TapButtonMap {
+    fn from(value: TapButtonMap) -> Self {
+        match value {
+            TapButtonMap::LeftRightMiddle => Self::LeftRightMiddle,
+            TapButtonMap::LeftMiddleRight => Self::LeftMiddleRight,
+        }
+    }
+}
+
 #[derive(knuffel::Decode, Debug, Default, PartialEq)]
 pub struct Tablet {
     #[knuffel(child, unwrap(argument))]
@@ -605,6 +622,20 @@ impl FromStr for AccelProfile {
     }
 }
 
+impl FromStr for TapButtonMap {
+    type Err = miette::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "left-right-middle" => Ok(Self::LeftRightMiddle),
+            "left-middle-right" => Ok(Self::LeftMiddleRight),
+            _ => Err(miette!(
+                r#"invalid tap button map, can be "left-right-middle" or "left-middle-right""#
+            )),
+        }
+    }
+}
+
 pub fn set_miette_hook() -> Result<(), miette::InstallError> {
     miette::set_hook(Box::new(|_| Box::new(NarratableReportHandler::new())))
 }
@@ -645,6 +676,7 @@ mod tests {
                     dwt
                     accel-speed 0.2
                     accel-profile "flat"
+                    tap-button-map "left-middle-right"
                 }
 
                 tablet {
@@ -734,6 +766,7 @@ mod tests {
                         natural_scroll: false,
                         accel_speed: 0.2,
                         accel_profile: Some(AccelProfile::Flat),
+                        tap_button_map: Some(TapButtonMap::LeftMiddleRight),
                     },
                     tablet: Tablet {
                         map_to_output: Some("eDP-1".to_owned()),

resources/default-config.kdl

@@ -31,6 +31,7 @@ input {
         natural-scroll
         // accel-speed 0.2
         // accel-profile "flat"
+        // tap-button-map "left-middle-right"
     }
 
     tablet {

src/input.rs

@@ -101,6 +101,10 @@ impl State {
                     if let Some(accel_profile) = c.accel_profile {
                         let _ = device.config_accel_set_profile(accel_profile.into());
                     }
+
+                    if let Some(tap_button_map) = c.tap_button_map {
+                        let _ = device.config_tap_set_button_map(tap_button_map.into());
+                    }
                 }
 
                 if device.has_capability(input::DeviceCapability::TabletTool) {