add config option debounce_time

Author: cppHusky

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "debouncer-udevmon"
-version = "0.2.2"
+version = "0.2.3"
 edition = "2024"
 license-file = "LICENSE"
 description = "linux keyboard debouncer with udevmon"

Cargo.toml

@@ -32,7 +32,7 @@ See [input.h](https://github.com/torvalds/linux/blob/master/include/uapi/linux/i
 
 A key event has 3 possible values: 1 (pressed), 0 (released) or 2 (autorepeat).
 
-The role of `debouncer` is that, it can delay the keyboard "release" event for some time (+12ms is ideal for my machine), which is similar to the ["spuious" mode of libinput](https://wayland.freedesktop.org/libinput/doc/latest/button-debouncing.html).
+The role of `debouncer` is that, it can delay the keyboard "release" event for some time (see #Configurations), which is similar to the ["spuious" mode of libinput](https://wayland.freedesktop.org/libinput/doc/latest/button-debouncing.html).
 
 Once `debouncer` received a "release" event, it will wait for some time. During this time, if no "press" event of the same key comes, it will write the "release" event to `stdout`; otherwise, it will neglect this event.
 
@@ -109,9 +109,14 @@ ExecStartPre=/usr/bin/sleep .7 # 700ms is fine on my machine
 
 ## Configurations
 
-You can set some configurations in `/etc/debouncer.toml`. Currently supported items are:
+You can set some configurations in `/etc/debouncer.toml`. Here is my configurations:
 
-- **`exceptions`: array of `u16` keycodes**. Keys in the exceptions will not delayed. For example, I want to neglect modifier keys such as Ctrl, Alt, Shift and Meta. Here is my config:
 ```toml
 exceptions=[29,42,54,56,97,100,125]
+debounce_time=14
 ```
+
+Currently supported items are:
+
+- **`exceptions`: array of `u16` keycodes**. Keys in the exceptions will not delayed. For example, I want to neglect modifier keys such as Ctrl, Alt, Shift and Meta.
+- **`debounce_time`: `u64` value in milliseconds**. Indicates how long should a release event delayed. For example, 14ms is ideal for my machine.

README.md

@@ -3,7 +3,7 @@ mod utils;
 fn main(){
     utils::LOGGER.init();
     utils::CONFIG.set(utils::Config::init()).unwrap();
-    #[allow(unused_variables)]
+    log::info!("Loaded config: {:?}",&utils::CONFIG);
     trpl::run(async{
         let (tx,rx)=trpl::channel::<input::InputEvent>();
         let tx_future=get_events(tx);
@@ -81,7 +81,7 @@ async fn delay_events(
     mut mpmc_rx:tokio::sync::broadcast::Receiver<u16>,
     keycode:u16
 ){
-    static DEBOUNCE_TIME:std::time::Duration=std::time::Duration::from_millis(14);
+    let debounce_time:std::time::Duration=std::time::Duration::from_millis(config!(debounce_time));
     log::debug!("\x1b[37mA new thread on keycode {} created and waiting for press event...\x1b[0m",keycode);
     let waiting=async{
         while let Ok(recv_keycode)=mpmc_rx.recv().await{
@@ -91,7 +91,7 @@ async fn delay_events(
         }
     };
     let timer=async{
-        trpl::sleep(DEBOUNCE_TIME).await;
+        trpl::sleep(debounce_time).await;
     };
     if let trpl::Either::Right(_)=trpl::race(waiting,timer).await{
         event_cache.push(input::InputEvent::new());

src/main.rs

@@ -31,11 +31,13 @@ impl Logger{
 #[derive(Debug,PartialEq,Eq,PartialOrd,Ord,serde::Deserialize)]
 pub struct Config{
     pub exceptions:Vec<u16>,
+    pub debounce_time:u64,
 }
 impl Config{
     pub fn new()->Self{
         Config{
             exceptions:vec![],
+            debounce_time:14,
         }
     }
     pub fn init()->Self{
@@ -47,6 +49,13 @@ impl Config{
                 return Self::new();
             }
         };
+        let builder=match builder.set_default("debounce_time",14){
+            Ok(b)=>b,
+            Err(e)=>{
+                log::error!("Failed to set default config: {}",e);
+                return Self::new();
+            }
+        };
         let builder=builder.add_source(config::File::with_name("/etc/debouncer.toml"));
         let config=match builder.build(){
             Ok(c)=>c,
@@ -92,5 +101,8 @@ mod test{
 macro_rules! config{
     (exceptions)=>{
         &$crate::utils::CONFIG.get().unwrap().exceptions
-    }
+    };
+    (debounce_time)=>{
+        $crate::utils::CONFIG.get().unwrap().debounce_time
+    };
 }