make clipboard dropped after no sub

src/server/clipboard_service.rs

@@ -4,12 +4,18 @@ pub use crate::common::{
     CONTENT,
 };
 
+#[derive(Default)]
 struct State {
     ctx: Option<ClipboardContext>,
 }
 
-impl Default for State {
-    fn default() -> Self {
+impl super::service::Reset for State {
+    fn reset(&mut self) {
+        *CONTENT.lock().unwrap() = Default::default();
+        self.ctx = None;
+    }
+
+    fn init(&mut self) {
         let ctx = match ClipboardContext::new(true) {
             Ok(ctx) => Some(ctx),
             Err(err) => {
@@ -17,13 +23,7 @@ impl Default for State {
                 None
             }
         };
-        Self { ctx }
-    }
-}
-
-impl super::service::Reset for State {
-    fn reset(&mut self) {
-        *CONTENT.lock().unwrap() = Default::default();
+        self.ctx = ctx;
     }
 }
 

src/server/service.rs

@@ -35,6 +35,7 @@ pub struct ServiceInner<T: Subscriber + From<ConnInner>> {
 
 pub trait Reset {
     fn reset(&mut self);
+    fn init(&mut self) {}
 }
 
 pub struct ServiceTmpl<T: Subscriber + From<ConnInner>>(Arc<RwLock<ServiceInner<T>>>);
@@ -266,15 +267,16 @@ impl<T: Subscriber + From<ConnInner>> ServiceTmpl<T> {
             while sp.active() {
                 let now = time::Instant::now();
                 if sp.has_subscribes() {
+                    if !may_reset {
+                        may_reset = true;
+                        state.init();
+                    }
                     if let Err(err) = callback(sp.clone(), &mut state) {
                         log::error!("Error of {} service: {}", sp.name(), err);
                         thread::sleep(time::Duration::from_millis(MAX_ERROR_TIMEOUT));
                         #[cfg(windows)]
                         crate::platform::windows::try_change_desktop();
                     }
-                    if !may_reset {
-                        may_reset = true;
-                    }
                 } else if may_reset {
                     state.reset();
                     may_reset = false;