From 30f4a5fbf62c795d7d0142866b26e4427d4e9795 Mon Sep 17 00:00:00 2001
From: littleblack111 <littleblack11111@gmail.com>
Date: Mon, 27 Jul 2026 15:34:19 +0800
Subject: fix(mathcalc): disallow input == result

mathcalc: use display string instead of raw big string so it supports
scientific notation etc.
---
 qml_plugin/src/launcher/mathcalc.rs | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/qml_plugin/src/launcher/mathcalc.rs b/qml_plugin/src/launcher/mathcalc.rs
index fd39ed1..623bf93 100644
--- a/qml_plugin/src/launcher/mathcalc.rs
+++ b/qml_plugin/src/launcher/mathcalc.rs
@@ -55,11 +55,12 @@ impl qobject::MathCalc {
         // TODO: consider moving to spawn_blocking
         RUNTIME.spawn(
             async move {
+                let input = input.to_string();
                 let result = parser::eval(
                     &mut *ctx
                         .lock()
                         .await,
-                    &input.to_string(),
+                    &input,
                     // TODO: move to const/config
                     53,
                 );
@@ -72,22 +73,17 @@ impl qobject::MathCalc {
                                         r.map_or_default(
                                             |r| {
                                                 let result: QString = r
-                                                    .to_string_big()
+                                                    .to_string()
                                                     .into();
-                                                QVariant::from(&result)
+                                                if result != input.into() {
+                                                    QVariant::from(&result)
+                                                } else {
+                                                    QVariant::default()
+                                                }
                                             },
                                         )
                                     },
-                                ), /* match result {
-                                    *     Ok(value) => {
-                                    *         let result: QString = value
-                                    *             .to_string()
-                                    *             .into();
-                                    *         QVariant::from(&result)
-                                    *     }
-                                    *     // TODO: add some logging
-                                    *     Err(_) => QVariant::default(),
-                                    * }, */
+                                ),
                             )
                     },
                 )
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