Add Paste button to Java Input pane (#136)

JavaToCSharpGui/Infrastructure/ITextClipboard.cs

@@ -5,6 +5,12 @@
 /// </summary>
 public interface ITextClipboard
 {
+    /// <summary>
+    /// Gets the clipboard's text.
+    /// </summary>
+    /// <returns>A <c>Task</c> representing the async operation that returns the clipboard text.</returns>
+    Task<string?> GetTextAsync();
+
     /// <summary>
     /// Sets the clipboard's text.
     /// </summary>

JavaToCSharpGui/Infrastructure/TextClipboard.cs

@@ -9,6 +9,16 @@ internal class TextClipboard : ITextClipboard
 
     public TextClipboard(IClipboard? clipboard) => _clipboard = clipboard;
 
+    /// <inheritdoc />
+    public async Task<string?> GetTextAsync()
+    {
+        if(_clipboard is null)
+        {
+            return null;
+        }
+        return await _clipboard.GetTextAsync();
+    }
+
     /// <inheritdoc />
     public async Task SetTextAsync(string? text)
     {

JavaToCSharpGui/ViewModels/MainWindowViewModel.cs

@@ -313,6 +313,26 @@ private async Task OpenFileDialog()
         }
     }
 
+    [RelayCommand]
+    private async Task PasteInput()
+    {
+        if (_clipboard is null)
+        {
+            return;
+        }
+
+        var text = await _clipboard.GetTextAsync();
+        if (!string.IsNullOrEmpty(text))
+        {
+            JavaText.Text = text;
+            ConversionStateLabel = "Pasted Java code from clipboard!";
+
+            await Task.Delay(2000);
+
+            await _dispatcher.InvokeAsync(() => { ConversionStateLabel = ""; }, DispatcherPriority.Background);
+        }
+    }
+
     [RelayCommand]
     private async Task CopyOutput()
     {

JavaToCSharpGui/Views/MainWindow.axaml

@@ -59,7 +59,7 @@
                         <Grid ColumnDefinitions="*,Auto,*">
                             <Grid RowDefinitions="Auto,Auto,*">
                                 <TextBlock Margin="10">Java Source Code Input:</TextBlock>
-                                <Grid Grid.Row="1" ColumnDefinitions="Auto,*,Auto" VerticalAlignment="Center">
+                                <Grid Grid.Row="1" ColumnDefinitions="Auto,*,Auto,Auto" VerticalAlignment="Center">
                                     <TextBlock Margin="10,5,10,5" VerticalAlignment="Center">File:</TextBlock>
                                     <TextBox Name="OpenPath"
                                              Grid.Column="1"
@@ -73,6 +73,13 @@
                                             Name="OpenFileDialog">
                                         <i:Icon Value="fa-folder-open" />
                                     </Button>
+                                    <Button Grid.Column="3" Margin="10,5,10,5"
+                                            Name="PasteInput"
+                                            ToolTip.Tip="Paste from Clipboard"
+                                            AutomationProperties.Name="Paste from Clipboard"
+                                            Command="{CompiledBinding PasteInputCommand}">
+                                        <i:Icon Value="fa-paste" />
+                                    </Button>
                                 </Grid>
                                 <AvaloniaEdit:TextEditor
                                     Name="JavaTextEditor"