[feat:] word count (per task and total) integrated

InfoWindow.axaml

@@ -0,0 +1,12 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d"  Width="200" Height="200"
+        x:Class="PLG_Exam.InfoWindow"
+        Title="InfoWindow">
+        <ScrollViewer>
+          <Label Content="" x:Name="LblInfo" />
+        </ScrollViewer>
+  
+</Window>

InfoWindow.axaml.cs

@@ -0,0 +1,15 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PLG_Exam;
+
+public partial class InfoWindow : Window
+{
+    public InfoWindow(string cnt)
+    {
+        InitializeComponent();
+
+        LblInfo.Content=cnt;
+    }
+}

MainWindow.axaml

@@ -18,6 +18,7 @@
                     
                 </StackPanel>
                 <Label x:Name="LblFilename" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,0,0,0" Content="Ungespeichert *" />
+                <Button Content="(i)" Click="OnInfoClick" x:Name="BtnInfo" HorizontalAlignment="Right" Margin="0,0,35,0" />
                 <Button Content="Dark Mode" Click="OnDarkModeClick" x:Name="BtnTheme" HorizontalAlignment="Right" Margin="0,0,0,0" />
         </Grid>
         </Border>

MainWindow.axaml.cs

@@ -83,6 +83,32 @@ namespace PLG_Exam
             AddNewTab();
         }
 
+        private void OnInfoClick(object? sender, RoutedEventArgs e)
+        {
+            new InfoWindow(CountTotalWords()).Show();
+        }
+
+        public int CountWords(string s)
+        {
+            s = s.Trim();
+            if (s == "")
+                return 0;
+            return s.Split(new char[] { ' ', '.', '?', '!', ',', '\n' }, StringSplitOptions.RemoveEmptyEntries).Length;
+        }
+
+        public string CountTotalWords(){
+            _ = GetCurrentExamDataAsJson();
+            string toReturn = "";
+            int totalWords = 0;
+            foreach (var tab in _currentExam.Tabs)
+            {
+                totalWords += CountWords(tab.Inhalt);
+                toReturn += "Aufgabe " + tab.Aufgabennummer + ": " + CountWords(tab.Inhalt) + "\n";
+            }
+            
+            return $"Anzahl Wörter (insg.): {totalWords}\n" + toReturn;
+        }
+
         private async void OnKeyDown(object? sender, Avalonia.Input.KeyEventArgs e)
         {
             if (e.KeyModifiers.HasFlag(Avalonia.Input.KeyModifiers.Control))