[Run][Plugin] Rename Calculator plugin to follow the required schema (#9026)

src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/ResultHelper.cs

@@ -0,0 +1,67 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Globalization;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Windows;
+using Wox.Plugin;
+
+namespace Microsoft.PowerToys.Run.Plugin.Calculator
+{
+    public static class ResultHelper
+    {
+        public static Result CreateResult(CalculateResult result, string iconPath)
+        {
+            return CreateResult(result.RoundedResult, iconPath);
+        }
+
+        public static Result CreateResult(decimal? roundedResult, string iconPath)
+        {
+            // Return null when the expression is not a valid calculator query.
+            if (roundedResult == null)
+            {
+                return null;
+            }
+
+            return new Result
+            {
+                // Using CurrentCulture since this is user facing
+                Title = roundedResult?.ToString(CultureInfo.CurrentCulture),
+                IcoPath = iconPath,
+                Score = 300,
+                SubTitle = Properties.Resources.wox_plugin_calculator_copy_number_to_clipboard,
+                Action = c => Action(roundedResult),
+            };
+        }
+
+        public static bool Action(decimal? roundedResult)
+        {
+            var ret = false;
+
+            if (roundedResult != null)
+            {
+                var thread = new Thread(() =>
+                {
+                    try
+                    {
+                        // Using CurrentUICulture since this is user facing
+                        Clipboard.SetText(roundedResult?.ToString(CultureInfo.CurrentUICulture.NumberFormat));
+                        ret = true;
+                    }
+                    catch (ExternalException)
+                    {
+                        MessageBox.Show(Properties.Resources.wox_plugin_calculator_copy_failed);
+                    }
+                });
+
+                thread.SetApartmentState(ApartmentState.STA);
+                thread.Start();
+                thread.Join();
+            }
+
+            return ret;
+        }
+    }
+}