Editor: triple click select whole line, new line included. Fixes #3469

Author: Federico Fissore

app/src/processing/app/syntax/SketchTextAreaEditorKit.java

@@ -15,7 +15,8 @@ public class SketchTextAreaEditorKit extends RSyntaxTextAreaEditorKit {
 
   private static final Action[] defaultActions = {
     new DeleteNextWordAction(),
-    new DeleteLineToCursorAction()
+    new DeleteLineToCursorAction(),
+    new SelectWholeLineAction()
   };
 
   @Override
@@ -100,4 +101,29 @@ public String getMacroID() {
 
   }
 
+  /**
+   * Selects the line around the caret.
+   */
+  public static class SelectWholeLineAction extends RecordableTextAction {
+
+    public SelectWholeLineAction() {
+      super(selectLineAction);
+    }
+
+    @Override
+    public void actionPerformedImpl(ActionEvent e, RTextArea textArea) {
+      Document document = textArea.getDocument();
+      Element map = document.getDefaultRootElement();
+      int currentLineNum = map.getElementIndex(textArea.getCaretPosition());
+      Element currentLineElement = map.getElement(currentLineNum);
+      textArea.select(currentLineElement.getStartOffset(), currentLineElement.getEndOffset());
+    }
+
+    @Override
+    public final String getMacroID() {
+      return DefaultEditorKit.selectLineAction;
+    }
+
+  }
+
 }