Add live-reload to libinput settings

README.md

@@ -163,9 +163,7 @@ Niri will load configuration from `$XDG_CONFIG_HOME/.config/niri/config.kdl` or
 If this fails, it will load [the default configuration file](resources/default-config.kdl).
 Please use the default configuration file as the starting point for your custom configuration.
 
-Niri will live-reload many of the configuration settings, like key binds or gaps, as you change the config file.
-Though, some settings are still missing live-reload support.
-Notably, input device libinput settings will only apply when the input device is reconnected.
+Niri will live-reload most of the configuration settings, like key binds or gaps or output modes, as you change the config file.
 
 [PaperWM]: https://github.com/paperwm/PaperWM
 [mako]: https://github.com/emersion/mako

src/input.rs

@@ -89,6 +89,7 @@ impl State {
 
         match event {
             InputEvent::DeviceAdded { device } => {
+                self.niri.devices.insert(device.clone());
 
                 if device.has_capability(input::DeviceCapability::TabletTool) {
                     match device.size() {
@@ -107,6 +108,7 @@ impl State {
             }
             InputEvent::DeviceRemoved { device } => {
                 self.niri.tablets.remove(device);
+                self.niri.devices.remove(device);
             }
             _ => (),
         }

src/niri.rs

@@ -96,7 +96,7 @@ use crate::dbus::gnome_shell_screenshot::{NiriToScreenshot, ScreenshotToNiri};
 use crate::dbus::mutter_screen_cast::{self, ScreenCastToNiri};
 use crate::frame_clock::FrameClock;
 use crate::handlers::configure_lock_surface;
-use crate::input::TabletData;
+use crate::input::{apply_libinput_settings, TabletData};
 use crate::layout::{Layout, MonitorRenderElement};
 use crate::pw_utils::{Cast, PipeWire};
 use crate::render_helpers::{NiriRenderer, PrimaryGpuTextureRenderElement};
@@ -135,6 +135,7 @@ pub struct Niri {
     // When false, we're idling with monitors powered off.
     pub monitors_active: bool,
 
+    pub devices: HashSet<input::Device>,
     pub tablets: HashMap<input::Device, TabletData>,
 
     // Smithay state.
@@ -542,6 +543,7 @@ impl State {
         animation::ANIMATION_SLOWDOWN.store(config.debug.animation_slowdown, Ordering::Relaxed);
 
         let mut reload_xkb = None;
+        let mut libinput_config_changed = false;
         let mut output_config_changed = false;
         let mut old_config = self.niri.config.borrow_mut();
 
@@ -569,6 +571,12 @@ impl State {
             );
         }
 
+        if config.input.touchpad != old_config.input.touchpad
+            || config.input.mouse != old_config.input.mouse
+        {
+            libinput_config_changed = true;
+        }
+
         if config.outputs != old_config.outputs {
             output_config_changed = true;
         }
@@ -586,6 +594,13 @@ impl State {
             }
         }
 
+        if libinput_config_changed {
+            let config = self.niri.config.borrow();
+            for mut device in self.niri.devices.iter().cloned() {
+                apply_libinput_settings(&config.input, &mut device);
+            }
+        }
+
         if output_config_changed {
             let mut resized_outputs = vec![];
             for output in self.niri.global_space.outputs() {
@@ -620,7 +635,6 @@ impl State {
         }
 
         self.niri.queue_redraw_all();
-        // FIXME: apply libinput device settings.
         // FIXME: apply xdg decoration settings.
     }
 
@@ -878,6 +892,7 @@ impl Niri {
             unmapped_windows: HashMap::new(),
             monitors_active: true,
 
+            devices: HashSet::new(),
             tablets: HashMap::new(),
 
             compositor_state,