Add middle-emulation libinput flag

3 files changed, 17 insertions, 0 deletions

diff --git a/niri-config/src/lib.rs b/niri-config/src/lib.rs
index d2343ff9..e5998bfb 100644
--- a/niri-config/src/lib.rs
+++ b/niri-config/src/lib.rs
@@ -177,6 +177,8 @@ pub struct Touchpad {
     pub left_handed: bool,
     #[knuffel(child)]
     pub disabled_on_external_mouse: bool,
+    #[knuffel(child)]
+    pub middle_emulation: bool,
 }
 
 #[derive(knuffel::Decode, Debug, Default, PartialEq)]
@@ -193,6 +195,8 @@ pub struct Mouse {
     pub scroll_method: Option<ScrollMethod>,
     #[knuffel(child)]
     pub left_handed: bool,
+    #[knuffel(child)]
+    pub middle_emulation: bool,
 }
 
 #[derive(knuffel::Decode, Debug, Default, PartialEq)]
@@ -207,6 +211,8 @@ pub struct Trackpoint {
     pub accel_profile: Option<AccelProfile>,
     #[knuffel(child, unwrap(argument, str))]
     pub scroll_method: Option<ScrollMethod>,
+    #[knuffel(child)]
+    pub middle_emulation: bool,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -2545,6 +2551,7 @@ mod tests {
                     accel-speed 0.4
                     accel-profile "flat"
                     scroll-method "no-scroll"
+                    middle-emulation
                 }
 
                 trackpoint {
@@ -2713,6 +2720,7 @@ mod tests {
                         tap_button_map: Some(TapButtonMap::LeftMiddleRight),
                         left_handed: false,
                         disabled_on_external_mouse: true,
+                        middle_emulation: false,
                     },
                     mouse: Mouse {
                         off: false,
@@ -2721,6 +2729,7 @@ mod tests {
                         accel_profile: Some(AccelProfile::Flat),
                         scroll_method: Some(ScrollMethod::NoScroll),
                         left_handed: false,
+                        middle_emulation: true,
                     },
                     trackpoint: Trackpoint {
                         off: true,
@@ -2728,6 +2737,7 @@ mod tests {
                         accel_speed: 0.0,
                         accel_profile: Some(AccelProfile::Flat),
                         scroll_method: Some(ScrollMethod::OnButtonDown),
+                        middle_emulation: false,
                     },
                     tablet: Tablet {
                         off: false,
diff --git a/src/input/mod.rs b/src/input/mod.rs
index 148129cf..4af68edf 100644
--- a/src/input/mod.rs
+++ b/src/input/mod.rs
@@ -2424,6 +2424,7 @@ pub fn apply_libinput_settings(config: &niri_config::Input, device: &mut input::
         let _ = device.config_scroll_set_natural_scroll_enabled(c.natural_scroll);
         let _ = device.config_accel_set_speed(c.accel_speed);
         let _ = device.config_left_handed_set(c.left_handed);
+        let _ = device.config_middle_emulation_set_enabled(c.middle_emulation);
 
         if let Some(accel_profile) = c.accel_profile {
             let _ = device.config_accel_set_profile(accel_profile.into());
@@ -2479,6 +2480,7 @@ pub fn apply_libinput_settings(config: &niri_config::Input, device: &mut input::
         let _ = device.config_scroll_set_natural_scroll_enabled(c.natural_scroll);
         let _ = device.config_accel_set_speed(c.accel_speed);
         let _ = device.config_left_handed_set(c.left_handed);
+        let _ = device.config_middle_emulation_set_enabled(c.middle_emulation);
 
         if let Some(accel_profile) = c.accel_profile {
             let _ = device.config_accel_set_profile(accel_profile.into());
@@ -2502,6 +2504,7 @@ pub fn apply_libinput_settings(config: &niri_config::Input, device: &mut input::
         });
         let _ = device.config_scroll_set_natural_scroll_enabled(c.natural_scroll);
         let _ = device.config_accel_set_speed(c.accel_speed);
+        let _ = device.config_middle_emulation_set_enabled(c.middle_emulation);
 
         if let Some(accel_profile) = c.accel_profile {
             let _ = device.config_accel_set_profile(accel_profile.into());
diff --git a/wiki/Configuration:-Input.md b/wiki/Configuration:-Input.md
index bb000170..4c824b9a 100644
--- a/wiki/Configuration:-Input.md
+++ b/wiki/Configuration:-Input.md
@@ -37,6 +37,7 @@ input {
         // click-method "clickfinger"
         // left-handed
         // disabled-on-external-mouse
+        // middle-emulation
     }
 
     mouse {
@@ -46,6 +47,7 @@ input {
         // accel-profile "flat"
         // scroll-method "no-scroll"
         // left-handed
+        // middle-emulation
     }
 
     trackpoint {
@@ -54,6 +56,7 @@ input {
         // accel-speed 0.2
         // accel-profile "flat"
         // scroll-method "on-button-down"
+        // middle-emulation
     }
 
     tablet {
@@ -138,6 +141,7 @@ A few settings are common between `touchpad`, `mouse` and `trackpoint`:
 - `accel-profile`: can be `adaptive` (the default) or `flat` (disables pointer acceleration).
 - `scroll-method`: when to generate scroll events instead of pointer motion events, can be `no-scroll`, `two-finger`, `edge`, or `on-button-down`.
   The default and supported methods vary depending on the device type.
+- `middle-emulation`: emulate a middle mouse click by pressing left and right mouse buttons at once.
 
 Settings specific to `touchpad`s: