added FusionCalculator as submodule

SharpCalculator.Avalonia/MainWindow.axaml.cs

@@ -1,8 +1,9 @@
 using System;
+using System.Diagnostics;
 using System.Globalization;
-using System.Text;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
+using FusionCalculator;
 
 namespace SharpCalculator.Avalonia;
 
@@ -10,80 +11,37 @@ public partial class MainWindow : Window
 {
     public MainWindow()
     {
-        _currentOperation = _initialOperation;
         InitializeComponent();
     }
 
-    private double _prevNumber;
-    private StringBuilder _currentNumberB = new();
-
-    private double ParseCurrentNumber() => double.Parse(_currentNumberB.ToString(), CultureInfo.InvariantCulture);
-
-    readonly Func<double, double, double> _initialOperation = (_, firstN) => firstN;
-    private Func<double, double, double> _currentOperation;
-    
-    private void NewOperation(Func<double, double, double> operation, Func<string> operationText)
-    {
-        // operation replacement
-        if (_currentNumberB.Length == 0) 
-            Input.Redo();
-        else
-        {
-            _prevNumber = _currentOperation( _prevNumber, ParseCurrentNumber());
-            Output.Text = _prevNumber.ToString(CultureInfo.InvariantCulture);
-            _currentNumberB.Clear();
-        }
-        Input.Text += operationText();
-        _currentOperation = operation;
-    }
-
-    private void NumberButton_OnClick(object? sender, RoutedEventArgs e)
+    private void MathButton_OnClick(object? sender, RoutedEventArgs e)
     {
         if (sender is not Button button)
             throw new Exception();
-        
         string text = button.Content!.ToString()!;
         Input.Text += text;
-        _currentNumberB.Append(text);
-        Output.Text = "= " + _currentOperation(_prevNumber, ParseCurrentNumber()).ToString(CultureInfo.InvariantCulture);
-    }
-
-    private void OperationButton_OnClick(object? sender, RoutedEventArgs e)
-    {
-        if (sender is not Button button)
-            throw new Exception();
-        string text = button.Content?.ToString()!;
-        switch (text)
-        {
-            case "+":
-                NewOperation((a, b) => a + b, () => text);
-                break;
-            case "-":
-                NewOperation((a, b) => a - b, () => text);
-                break;
-            case "*":
-                NewOperation((a, b) => a * b, () => text);
-                break;
-            case "/":
-                NewOperation((a, b) => a / b, () => text);
-                break;
-            case "^":
-                NewOperation(Math.Pow, () => text);
-                break;
-            case "=":
-                NewOperation((_, newNumber) => newNumber, () => $"={_prevNumber}\n");
-                break;
-            default:
-                throw new Exception("incorrect button text: ");
-        }
     }
 
     private void ClearButton_OnClick(object? sender, RoutedEventArgs e)
     {
-        _prevNumber = 0;
-        _currentOperation = _initialOperation;
-        _currentNumberB.Clear();
         Input.Text = "";
-        Output.Text = "= 0";
+        Output.Text = "";
+    }
+
+    private void Input_OnTextChanged(object? sender, TextChangedEventArgs e)
+    {
+        if(Input.Text == null)
+            return;
+        string exprStr = Input.Text;
+        try
+        {
+            double rezult = Calculator.Calculate(exprStr);
+            if(!double.IsNaN(rezult))
+                Output.Text = rezult.ToString(CultureInfo.InvariantCulture);
+        }
+        catch (Exception exception)
+        {
+            Debug.WriteLine(exception.ToString());
+        }
     }
 }