fix, separate window, event stream leak

Signed-off-by: dignow <linlong1265@gmail.com>

src/keyboard.rs

@@ -52,6 +52,9 @@ lazy_static::lazy_static! {
 
 pub mod client {
     use super::*;
+    lazy_static::lazy_static! {
+        static ref IS_GRAB_STARTED: Arc<Mutex<bool>> = Arc::new(Mutex::new(false));
+    }
 
     pub fn get_keyboard_mode() -> String {
         #[cfg(not(any(feature = "flutter", feature = "cli")))]
@@ -70,7 +73,12 @@ pub mod client {
     }
 
     pub fn start_grab_loop() {
+        let mut lock = IS_GRAB_STARTED.lock().unwrap();
+        if *lock {
+            return;
+        }
         super::start_grab_loop();
+        *lock = true;
     }
 
     #[cfg(not(any(target_os = "android", target_os = "ios")))]