Add copy button to the serial monitor

Add a copy button to the serial monitor that copies the text in the serial monitor output area to the system clipboard.

Author: Pieter12345

app/src/processing/app/AbstractTextMonitor.java

@@ -38,6 +38,7 @@ public abstract class AbstractTextMonitor extends AbstractMonitor {
   protected JTextField textField;
   protected JButton sendButton;
   protected JButton clearButton;
+  protected JButton copyButton;
   protected JCheckBox autoscrollBox;
   protected JCheckBox addTimeStampBox;
   protected JComboBox<String> lineEndings;
@@ -84,6 +85,7 @@ public void windowGainedFocus(WindowEvent e) {
 
     sendButton = new JButton(tr("Send"));
     clearButton = new JButton(tr("Clear output"));
+    copyButton = new JButton(tr("Copy output"));
 
     upperPane.add(textField);
     upperPane.add(Box.createRigidArea(new Dimension(4, 0)));
@@ -131,6 +133,8 @@ public void windowGainedFocus(WindowEvent e) {
     pane.add(Box.createRigidArea(new Dimension(8, 0)));
     pane.add(serialRates);
     pane.add(Box.createRigidArea(new Dimension(8, 0)));
+    pane.add(copyButton);
+    pane.add(Box.createRigidArea(new Dimension(8, 0)));
     pane.add(clearButton);
 
     applyPreferences();
@@ -143,6 +147,7 @@ protected void onEnableWindow(boolean enable)
   {
     textArea.setEnabled(enable);
     clearButton.setEnabled(enable);
+    copyButton.setEnabled(enable);
     scrollPane.setEnabled(enable);
     textField.setEnabled(enable);
     sendButton.setEnabled(enable);
@@ -161,6 +166,10 @@ public void onClearCommand(ActionListener listener) {
     clearButton.addActionListener(listener);
   }
 
+  public void onCopyCommand(ActionListener listener) {
+    copyButton.addActionListener(listener);
+  }
+
   public void onSerialRateChange(ActionListener listener) {
     serialRates.addActionListener(listener);
   }

app/src/processing/app/SerialMonitor.java

@@ -22,6 +22,9 @@
 import processing.app.legacy.PApplet;
 
 import java.awt.Color;
+import java.awt.Toolkit;
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.StringSelection;
 import java.awt.event.ActionEvent;
 
 import static processing.app.I18n.tr;
@@ -57,8 +60,14 @@ public SerialMonitor(Base base, BoardPort port) {
       send(textField.getText());
       textField.setText("");
     });
-    
+
     onClearCommand((ActionEvent event) -> textArea.setText(""));
+
+    onCopyCommand((ActionEvent event) -> {
+      String text = textArea.getText();
+      Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+      clipboard.setContents(new StringSelection(text), null);
+    });
   }
 
   private void send(String s) {