Optimize clipboard change listener

Cargo.lock

@@ -352,6 +352,20 @@ dependencies = [
  "vec_map",
 ]
 
+[[package]]
+name = "clipboard-master"
+version = "3.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1cd1cb2f0df685eb4a61c656faeb6ef391ad776943d3723afb12bdcbceff824d"
+dependencies = [
+ "objc",
+ "objc-foundation",
+ "objc_id",
+ "winapi 0.3.9",
+ "windows-win",
+ "x11-clipboard",
+]
+
 [[package]]
 name = "clipboard-win"
 version = "4.2.1"
@@ -2860,6 +2874,7 @@ dependencies = [
  "cc",
  "cfg-if 1.0.0",
  "clap",
+ "clipboard-master",
  "cocoa",
  "core-foundation 0.9.1",
  "core-graphics",
@@ -3771,6 +3786,15 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "windows-win"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d4243ec23afe4e9b4e668b3c0a0e973f1b8265f6a46223cfcbc16fd267480c0"
+dependencies = [
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "winreg"
 version = "0.6.2"
@@ -3814,6 +3838,15 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"
 
+[[package]]
+name = "x11-clipboard"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b397ace6e980510de59a4fe3d4c758dffab231d6d747ce9fa1aba6b6035d5f32"
+dependencies = [
+ "xcb",
+]
+
 [[package]]
 name = "x11rb"
 version = "0.8.1"
@@ -3826,6 +3859,16 @@ dependencies = [
  "winapi-wsapoll",
 ]
 
+[[package]]
+name = "xcb"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62056f63138b39116f82a540c983cc11f1c90cd70b3d492a70c25eaa50bd22a6"
+dependencies = [
+ "libc",
+ "log",
+]
+
 [[package]]
 name = "yansi"
 version = "0.5.0"

Cargo.toml

@@ -51,6 +51,7 @@ mac_address = "1.1"
 sciter-rs = { git = "https://github.com/open-trade/rust-sciter", branch = "dyn" }
 ctrlc = "3.2"
 arboard = "2.0"
+clipboard-master = "3"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 #systray = { git = "https://github.com/open-trade/systray-rs" }

src/server/clipboard_service.rs

@@ -1,3 +1,7 @@
+use std::sync::mpsc::Sender;
+
+use clipboard_master::{CallbackResult, ClipboardHandler, Master};
+
 use super::*;
 pub use crate::common::{
     check_clipboard, ClipboardContext, CLIPBOARD_INTERVAL as INTERVAL, CLIPBOARD_NAME as NAME,
@@ -27,12 +31,28 @@ impl super::service::Reset for State {
     }
 }
 
+struct ClipHandle {
+    tx: Sender<bool>,
+}
+
+impl ClipboardHandler for ClipHandle {
+    fn on_clipboard_change(&mut self) -> CallbackResult {
+        let _ = self.tx.send(true);
+        CallbackResult::Next
+    }
+}
+
 pub fn new() -> GenericService {
     let sp = GenericService::new(NAME, true);
-    sp.repeat::<State, _>(INTERVAL, run);
+    sp.listen::<State, _, _>(notify, run);
     sp
 }
 
+fn notify(tx: Sender<bool>) -> ResultType<()> {
+    Master::new(ClipHandle { tx }).run()?;
+    Ok(())
+}
+
 fn run(sp: GenericService, state: &mut State) -> ResultType<()> {
     if let Some(ctx) = state.ctx.as_mut() {
         if let Some(msg) = check_clipboard(ctx, None) {

src/server/service.rs

@@ -1,5 +1,6 @@
 use super::*;
 use std::{
+    sync::{self, mpsc::Sender},
     thread::{self, JoinHandle},
     time,
 };
@@ -153,6 +154,39 @@ impl<T: Subscriber + From<ConnInner>> ServiceTmpl<T> {
         }
     }
 
+    pub fn listen<S, N, F>(&self, notify: N, callback: F)
+    where
+        N: 'static + FnMut(Sender<bool>) -> ResultType<()> + Send,
+        F: 'static + FnMut(Self, &mut S) -> ResultType<()> + Send,
+        S: 'static + Default + Reset,
+    {
+        let mut notify = notify;
+        let mut callback = callback;
+        let sp = self.clone();
+        let (tx, rx) = sync::mpsc::channel();
+        thread::spawn(move || {
+            let _ = notify(tx);
+        });
+
+        let thread = thread::spawn(move || {
+            let mut state = S::default();
+            while let Ok(changed) = rx.recv() {
+                if changed && sp.active() {
+                    if sp.has_subscribes() {
+                        if let Err(err) = callback(sp.clone(), &mut state) {
+                            log::error!("Error of {} service: {}", sp.name(), err);
+                            #[cfg(windows)]
+                            crate::platform::windows::try_change_desktop();
+                        }
+                    } else {
+                        state.reset();
+                    }
+                }
+            }
+        });
+        self.0.write().unwrap().handle = Some(thread);
+    }
+
     pub fn repeat<S, F>(&self, interval_ms: u64, callback: F)
     where
         F: 'static + FnMut(Self, &mut S) -> ResultType<()> + Send,