flutter_desktop: get double click time, win

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/flutter_ffi.rs

@@ -804,8 +804,8 @@ pub fn main_is_root() -> bool {
     is_root()
 }
 
-pub fn main_is_release() -> bool {
-    is_release()
+pub fn get_double_click_time() -> SyncReturn<i32> {
+    SyncReturn(crate::platform::get_double_click_time() as _)
 }
 
 pub fn main_start_dbus_server() {

src/platform/linux.rs

@@ -684,3 +684,10 @@ pub fn check_super_user_permission() -> ResultType<bool> {
     let status = std::process::Command::new("pkexec").arg(arg).status()?;
     Ok(status.success() && status.code() == Some(0))
 }
+
+pub fn get_double_click_time() -> u32 {
+    // to-do
+    // GtkSettings *settings = gtk_settings_get_default ();
+    // g_object_get (settings, "gtk-double-click-time", &double_click_time, NULL);
+    500 as _
+}

src/platform/macos.rs

@@ -537,3 +537,9 @@ pub fn quit_gui() {
         let () = msg_send!(NSApp(), terminate: nil);
     };
 }
+
+
+pub fn get_double_click_time() -> u32 {
+    // to-do: https://github.com/servo/core-foundation-rs/blob/786895643140fa0ee4f913d7b4aeb0c4626b2085/cocoa/src/appkit.rs#L2823
+    500 as _
+}

src/platform/windows.rs

@@ -1632,3 +1632,7 @@ pub fn is_foreground_window_elevated() -> ResultType<bool> {
 fn get_current_pid() -> u32 {
     unsafe { GetCurrentProcessId() }
 }
+
+pub fn get_double_click_time() -> u32 {
+    unsafe { GetDoubleClickTime() }
+}