From 8c61ee10bfdb876046d7b852441c0cd4a8c45775 Mon Sep 17 00:00:00 2001
From: Eymard Silva <eym_silva@outlook.com>
Date: Thu, 30 Apr 2026 15:02:16 +0100
Subject: [PATCH] Handle complex calculator results

Return a friendly calculator error when Mages evaluates an expression to a complex number instead of letting decimal conversion throw.

Fixes #43937
---
 .../QueryTests.cs                                        | 2 ++
 .../CalculateEngine.cs                                   | 6 ++++++
 .../Properties/Resources.Designer.cs                     | 9 +++++++++
 .../Properties/Resources.resx                            | 5 ++++-
 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator.UnitTest/QueryTests.cs b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator.UnitTest/QueryTests.cs
index 2c3896cde66b..e61719842add 100644
--- a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator.UnitTest/QueryTests.cs
+++ b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator.UnitTest/QueryTests.cs
@@ -37,6 +37,7 @@ public void Initialize()
         [DataRow("=2^96", "Result value was either too large or too small for a decimal number")]
         [DataRow("=+()", "Calculation result is not a valid number (NaN)")]
         [DataRow("=[10,10]", "Unsupported use of square brackets")]
+        [DataRow("=sqrt(-1)", "Complex numbers are not supported")]
         [DataRow("=5/0", "Expression contains division by zero")]
         [DataRow("=5 / 0", "Expression contains division by zero")]
         [DataRow("10+(8*9)/0+7", "Expression contains division by zero")]
@@ -63,6 +64,7 @@ public void ErrorResultOnInvalidKeywordQuery(string typedString, string expected
         [DataRow("2^96")]
         [DataRow("+()")]
         [DataRow("[10,10]")]
+        [DataRow("sqrt(-1)")]
         [DataRow("5/0")]
         [DataRow("5 / 0")]
         [DataRow("10+(8*9)/0+7")]
diff --git a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateEngine.cs b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateEngine.cs
index f44a72676c7b..a4c7b3025044 100644
--- a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateEngine.cs
+++ b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateEngine.cs
@@ -5,6 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using System.Numerics;
 using System.Text.RegularExpressions;
 
 using Mages.Core;
@@ -122,6 +123,11 @@ private static dynamic TransformResult(object result)
                 return Properties.Resources.wox_plugin_calculator_double_array_returned;
             }
 
+            if (result is Complex)
+            {
+                return Properties.Resources.wox_plugin_calculator_complex_number_returned;
+            }
+
             return result;
         }
 
diff --git a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.Designer.cs b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.Designer.cs
index 861993dbdd33..bb7efc291aba 100644
--- a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.Designer.cs
+++ b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.Designer.cs
@@ -68,6 +68,15 @@ public static string wox_plugin_calculator_calculation_failed {
                 return ResourceManager.GetString("wox_plugin_calculator_calculation_failed", resourceCulture);
             }
         }
+
+        /// <summary>
+        ///   Looks up a localized string similar to Complex numbers are not supported.
+        /// </summary>
+        public static string wox_plugin_calculator_complex_number_returned {
+            get {
+                return ResourceManager.GetString("wox_plugin_calculator_complex_number_returned", resourceCulture);
+            }
+        }
         
         /// <summary>
         ///   Looks up a localized string similar to Copy failed, please try later.
diff --git a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.resx b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.resx
index 3c56eedf4b5d..7f913084d2d1 100644
--- a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.resx
+++ b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/Properties/Resources.resx
@@ -141,6 +141,9 @@
   <data name="wox_plugin_calculator_double_array_returned" xml:space="preserve">
     <value>Unsupported use of square brackets</value>
   </data>
+  <data name="wox_plugin_calculator_complex_number_returned" xml:space="preserve">
+    <value>Complex numbers are not supported</value>
+  </data>
   <data name="wox_plugin_calculator_not_covert_to_decimal" xml:space="preserve">
     <value>Result value was either too large or too small for a decimal number</value>
   </data>
@@ -187,4 +190,4 @@
     <value>Gradians</value>
     <comment>Text for angle unit.</comment>
   </data>
-</root>
\ No newline at end of file
+</root>