windows kill flutter main window when --server close (#8077)

Signed-off-by: 21pages <pages21@163.com>

src/core_main.rs

@@ -565,7 +565,7 @@ fn core_main_invoke_new_connection(mut args: std::env::Args) -> Option<Vec<Strin
     {
         use winapi::um::winuser::WM_USER;
         let res = crate::platform::send_message_to_hnwd(
-            "FLUTTER_RUNNER_WIN32_WINDOW",
+            &crate::platform::FLUTTER_RUNNER_WIN32_WINDOW_CLASS,
             &crate::get_app_name(),
             (WM_USER + 2) as _, // referred from unilinks desktop pub
             uni_links.as_str(),

src/ipc.rs

@@ -356,6 +356,8 @@ async fn handle(data: Data, stream: &mut Connection) {
                 crate::server::input_service::fix_key_down_timeout_at_exit();
                 if is_server() {
                     let _ = privacy_mode::turn_off_privacy(0, Some(PrivacyModeState::OffByPeer));
+                    #[cfg(all(windows, feature = "flutter"))]
+                    crate::platform::kill_flutter_main_window();
                 }
                 std::process::exit(0);
             }

src/platform/windows.rs

@@ -65,6 +65,8 @@ use windows_service::{
 use winreg::enums::*;
 use winreg::RegKey;
 
+pub const FLUTTER_RUNNER_WIN32_WINDOW_CLASS: &'static str = "FLUTTER_RUNNER_WIN32_WINDOW";
+
 pub fn get_focused_display(displays: Vec<DisplayInfo>) -> Option<usize> {
     unsafe {
         let hWnd = GetForegroundWindow();
@@ -2419,3 +2421,33 @@ pub fn is_x64() -> bool {
     }
     unsafe { sys_info.u.s().wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 }
 }
+
+#[cfg(feature = "flutter")]
+pub fn kill_flutter_main_window() {
+    // It is used to kill the hidden flutter main window process, it can also kill the install window process
+    log::info!("kill flutter main window");
+    unsafe {
+        let window_name = wide_string(&crate::get_app_name());
+        let class_name = wide_string(FLUTTER_RUNNER_WIN32_WINDOW_CLASS);
+        let hwnd = FindWindowW(class_name.as_ptr(), window_name.as_ptr());
+        if hwnd.is_null() {
+            return;
+        }
+        let mut process_id: u32 = 0;
+        GetWindowThreadProcessId(hwnd, &mut process_id as *mut u32);
+        if process_id == 0 {
+            return;
+        }
+        let output = Command::new("taskkill")
+            .arg("/F")
+            .arg("/PID")
+            .arg(process_id.to_string())
+            .output()
+            .expect("Failed to execute command");
+        if output.status.success() {
+            log::info!("kill flutter main window success");
+        } else {
+            log::error!("kill flutter main window failed");
+        }
+    }
+}