1 files changed, 111 insertions, 0 deletions
diff --git a/qml_plugin/src/launcher/mathcalc.rs b/qml_plugin/src/launcher/mathcalc.rs
new file mode 100644
index 0000000..fd39ed1
--- /dev/null
+++ b/qml_plugin/src/launcher/mathcalc.rs
@@ -0,0 +1,111 @@
+use cxx_qt::{CxxQtType, Threading};
+use cxx_qt_lib::{QString, QVariant};
+use kalk::parser;
+use std::{pin::Pin, sync::Arc};
+use tokio::sync::Mutex;
+
+use crate::RUNTIME;
+
+#[cxx_qt::bridge]
+mod qobject {
+    extern "C++" {
+        include!("cxx-qt-lib/qstring.h");
+        include!("cxx-qt-lib/qvariant.h");
+        type QString = cxx_qt_lib::QString;
+        type QVariant = cxx_qt_lib::QVariant;
+    }
+
+    extern "RustQt" {
+        #[qobject]
+        #[qml_element]
+        #[qml_singleton]
+        #[qproperty(
+            QVariant, result
+        )]
+        type MathCalc = super::MathCalcRs;
+
+        #[qinvokable]
+        fn query(self: Pin<&mut MathCalc>, input: QString);
+
+        #[qinvokable]
+        fn reset(self: Pin<&mut MathCalc>);
+
+        #[qinvokable]
+        fn reset_ctx(self: Pin<&mut MathCalc>);
+    }
+
+    impl cxx_qt::Threading for MathCalc {}
+}
+
+#[derive(Default)]
+pub struct MathCalcRs {
+    result: QVariant,
+
+    ctx: Arc<Mutex<parser::Context>>,
+}
+
+impl qobject::MathCalc {
+    fn query(self: Pin<&mut Self>, input: QString) {
+        let qt_thread = self.qt_thread();
+        let ctx = Arc::clone(
+            &self
+                .rust_mut()
+                .ctx,
+        );
+        // TODO: consider moving to spawn_blocking
+        RUNTIME.spawn(
+            async move {
+                let result = parser::eval(
+                    &mut *ctx
+                        .lock()
+                        .await,
+                    &input.to_string(),
+                    // TODO: move to const/config
+                    53,
+                );
+                qt_thread.queue(
+                    |mut qo| {
+                        qo.as_mut()
+                            .set_result(
+                                result.map_or_default(
+                                    |r| {
+                                        r.map_or_default(
+                                            |r| {
+                                                let result: QString = r
+                                                    .to_string_big()
+                                                    .into();
+                                                QVariant::from(&result)
+                                            },
+                                        )
+                                    },
+                                ), /* match result {
+                                    *     Ok(value) => {
+                                    *         let result: QString = value
+                                    *             .to_string()
+                                    *             .into();
+                                    *         QVariant::from(&result)
+                                    *     }
+                                    *     // TODO: add some logging
+                                    *     Err(_) => QVariant::default(),
+                                    * }, */
+                            )
+                    },
+                )
+            },
+        );
+    }
+
+    fn reset(mut self: Pin<&mut Self>) {
+        self.as_mut()
+            .set_result(QVariant::default());
+        self.as_mut()
+            .rust_mut()
+            .ctx = Arc::new(Mutex::new(parser::Context::default()));
+    }
+
+    fn reset_ctx(mut self: Pin<&mut Self>) {
+        self.as_mut()
+            .rust_mut()
+            .ctx = Arc::new(Mutex::new(parser::Context::default()));
+    }
+}