fix extracted forground window not foreground (#8521)

Signed-off-by: 21pages <sunboeasy@gmail.com>

src/common.rs

@@ -853,7 +853,32 @@ pub fn run_me<T: AsRef<std::ffi::OsStr>>(args: Vec<T>) -> std::io::Result<std::p
         }
     }
     let cmd = std::env::current_exe()?;
-    return std::process::Command::new(cmd).args(&args).spawn();
+    let mut cmd = std::process::Command::new(cmd);
+    #[cfg(windows)]
+    let mut force_foreground = false;
+    #[cfg(windows)]
+    {
+        let arg_strs = args
+            .iter()
+            .map(|x| x.as_ref().to_string_lossy())
+            .collect::<Vec<_>>();
+        if arg_strs == vec!["--install"] || arg_strs == &["--noinstall"] {
+            cmd.env(crate::platform::SET_FOREGROUND_WINDOW, "1");
+            force_foreground = true;
+        }
+    }
+    let result = cmd.args(&args).spawn();
+    match result.as_ref() {
+        Ok(_child) =>
+        {
+            #[cfg(windows)]
+            if force_foreground {
+                unsafe { winapi::um::winuser::AllowSetForegroundWindow(_child.id() as u32) };
+            }
+        }
+        Err(err) => log::error!("run_me: {err:?}"),
+    }
+    result
 }
 
 #[inline]

src/platform/windows.rs

@@ -68,6 +68,7 @@ use winreg::RegKey;
 
 pub const FLUTTER_RUNNER_WIN32_WINDOW_CLASS: &'static str = "FLUTTER_RUNNER_WIN32_WINDOW"; // main window, install window
 pub const EXPLORER_EXE: &'static str = "explorer.exe";
+pub const SET_FOREGROUND_WINDOW: &'static str = "SET_FOREGROUND_WINDOW";
 
 pub fn get_focused_display(displays: Vec<DisplayInfo>) -> Option<usize> {
     unsafe {
@@ -461,8 +462,18 @@ const SERVICE_TYPE: ServiceType = ServiceType::OWN_PROCESS;
 
 extern "C" {
     fn get_current_session(rdp: BOOL) -> DWORD;
-    fn LaunchProcessWin(cmd: *const u16, session_id: DWORD, as_user: BOOL, token_pid: &mut DWORD) -> HANDLE;
-    fn GetSessionUserTokenWin(lphUserToken: LPHANDLE, dwSessionId: DWORD, as_user: BOOL, token_pid: &mut DWORD) -> BOOL;
+    fn LaunchProcessWin(
+        cmd: *const u16,
+        session_id: DWORD,
+        as_user: BOOL,
+        token_pid: &mut DWORD,
+    ) -> HANDLE;
+    fn GetSessionUserTokenWin(
+        lphUserToken: LPHANDLE,
+        dwSessionId: DWORD,
+        as_user: BOOL,
+        token_pid: &mut DWORD,
+    ) -> BOOL;
     fn selectInputDesktop() -> BOOL;
     fn inputDesktopSelected() -> BOOL;
     fn is_windows_server() -> BOOL;
@@ -2517,3 +2528,15 @@ fn nt_terminate_process(process_id: DWORD) -> ResultType<()> {
         }
     }
 }
+
+pub fn try_set_window_foreground(window: HWND) {
+    let env_key = SET_FOREGROUND_WINDOW;
+    if let Ok(value) = std::env::var(env_key) {
+        if value == "1" {
+            unsafe {
+                SetForegroundWindow(window);
+            }
+            std::env::remove_var(env_key);
+        }
+    }
+}

src/ui.rs

@@ -87,6 +87,8 @@ pub fn start(args: &mut [String]) {
     frame.set_title(&crate::get_app_name());
     #[cfg(target_os = "macos")]
     crate::platform::delegate::make_menubar(frame.get_host(), args.is_empty());
+    #[cfg(windows)]
+    crate::platform::try_set_window_foreground(frame.get_hwnd() as _);
     let page;
     if args.len() > 1 && args[0] == "--play" {
         args[0] = "--connect".to_owned();