Add animation-slowdown debug setting

Cargo.lock

@@ -1376,6 +1376,7 @@ dependencies = [
  "knuffel",
  "logind-zbus",
  "miette",
+ "portable-atomic",
  "profiling",
  "sd-notify",
  "serde",
@@ -1666,6 +1667,12 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "31114a898e107c51bb1609ffaf55a0e011cf6a4d7f1170d0015a165082c0338b"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"

Cargo.toml

@@ -16,6 +16,7 @@ keyframe = { version = "1.1.1", default-features = false }
 knuffel = "3.2.0"
 logind-zbus = "3.1.2"
 miette = { version = "5.10.0", features = ["fancy"] }
+portable-atomic = { version = "1.4.3", default-features = false, features = ["float"] }
 profiling = "1.0.9"
 sd-notify = "0.4.1"
 serde = { version = "1.0.188", features = ["derive"] }

src/animation.rs

@@ -2,9 +2,12 @@ use std::time::Duration;
 
 use keyframe::functions::EaseOutCubic;
 use keyframe::EasingFunction;
+use portable_atomic::{AtomicF64, Ordering};
 
 use crate::utils::get_monotonic_time;
 
+pub static ANIMATION_SLOWDOWN: AtomicF64 = AtomicF64::new(1.);
+
 #[derive(Debug)]
 pub struct Animation {
     from: f64,
@@ -23,7 +26,7 @@ impl Animation {
         Self {
             from,
             to,
-            duration: over,
+            duration: over.mul_f64(ANIMATION_SLOWDOWN.load(Ordering::Relaxed)),
             start_time: now,
             current_time: now,
         }

src/config.rs

@@ -13,6 +13,8 @@ pub struct Config {
     pub input: Input,
     #[knuffel(child, default)]
     pub binds: Binds,
+    #[knuffel(child, default)]
+    pub debug: DebugConfig,
 }
 
 // FIXME: Add other devices.
@@ -122,6 +124,20 @@ pub enum Action {
     MaximizeColumn,
 }
 
+#[derive(knuffel::Decode, Debug, PartialEq)]
+pub struct DebugConfig {
+    #[knuffel(child, unwrap(argument), default = 1.)]
+    pub animation_slowdown: f64,
+}
+
+impl Default for DebugConfig {
+    fn default() -> Self {
+        Self {
+            animation_slowdown: 1.,
+        }
+    }
+}
+
 impl Config {
     pub fn load(path: Option<PathBuf>) -> miette::Result<Self> {
         let path = if let Some(path) = path {
@@ -233,6 +249,10 @@ mod tests {
                 Mod+Ctrl+Shift+L { move-window-to-monitor-right; }
                 Mod+Comma { consume-window-into-column; }
             }
+
+            debug {
+                animation-slowdown 2.0
+            }
             "#,
             Config {
                 input: Input {
@@ -286,6 +306,9 @@ mod tests {
                         actions: vec![Action::ConsumeWindowIntoColumn],
                     },
                 ]),
+                debug: DebugConfig {
+                    animation_slowdown: 2.,
+                },
             },
         );
     }

src/main.rs

@@ -20,6 +20,7 @@ use clap::Parser;
 use config::Config;
 use miette::Context;
 use niri::{Niri, State};
+use portable_atomic::Ordering;
 use smithay::reexports::calloop::EventLoop;
 use smithay::reexports::wayland_server::Display;
 use tracing_subscriber::EnvFilter;
@@ -61,6 +62,7 @@ fn main() {
             Config::default()
         }
     };
+    animation::ANIMATION_SLOWDOWN.store(config.debug.animation_slowdown, Ordering::Relaxed);
 
     let mut event_loop = EventLoop::try_new().unwrap();
     let mut display = Display::new().unwrap();