1 files changed, 30 insertions, 4 deletions

diff --git a/src/main.rs b/src/main.rs
index 9c1e107..a372735 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,6 +9,7 @@ use gtk4::prelude::{
     ApplicationExt, ApplicationExtManual, EditableExt, GridExt, GtkWindowExt, WidgetExt,
 };
 use gtk4::{glib, Application, ApplicationWindow, Entry, EventControllerKey, Grid};
+use std::sync::{Arc, Mutex};
 
 fn main() -> ExitCode {
     let app = Application::builder()
@@ -30,18 +31,43 @@ fn main() -> ExitCode {
         let output = Entry::builder().editable(false).build();
         grid.attach(&output, 0, 1, 1, 1);
 
+        let mailbox = Arc::new(Mutex::new(String::from("")));
+        let (flag_send, flag_recv) = async_channel::bounded(1);
+
+        glib::spawn_future_local({
+            let mailbox = mailbox.clone();
+            async move {
+                while let Ok(()) = flag_recv.recv().await {
+                    let input = std::mem::take(&mut *mailbox.lock().unwrap());
+                    let (result_send, result_recv) = async_channel::bounded(1);
+                    gio::spawn_blocking(move || {
+                        let Some(bytecode) = parser::parse(&input) else {
+                            return;
+                        };
+                        result_send
+                            .send_blocking(format!("{}", op::eval(bytecode.into_iter())))
+                            .unwrap();
+                    })
+                    .await
+                    .unwrap();
+                    if let Ok(result) = result_recv.try_recv() {
+                        output.set_text(&result);
+                    }
+                }
+            }
+        });
+
         let key_controller = EventControllerKey::new();
         key_controller.connect_key_released(
-            clone!(@weak window, @weak input, @weak output => move |_, k, _, modifiers| {
+            clone!(@weak window, @weak input => move |_, k, _, modifiers| {
                 if k == Key::Escape
                     || k == Key::Return
                     || k == Key::bracketleft && modifiers.contains(ModifierType::CONTROL_MASK)
                 {
                     window.destroy();
                 }
-                if let Some(bytecode) = parser::parse(&input.text()) {
-                    output.set_text(&format!("{}", op::eval(&bytecode)));
-                }
+                *mailbox.lock().unwrap() = input.text().to_string();
+                let _ = flag_send.try_send(());
             }),
         );
         window.add_controller(key_controller);