convert RunnerTextPane to Java, removing Xtend dependencies

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/ui/runner/RunnerTextPane.java

@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright 2019 Philipp Salvisberg <philipp.salvisberg@trivadis.com>
  * 
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -18,47 +18,50 @@
 import java.awt.Graphics;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
+
 import javax.swing.JTextPane;
 import javax.swing.UIManager;
-import javax.swing.text.Caret;
 
-@SuppressWarnings("all")
 public class RunnerTextPane extends JTextPane implements FocusListener {
-  public RunnerTextPane() {
-    super();
-    this.addFocusListener(this);
-  }
-  
-  @Override
-  public void paintComponent(final Graphics g) {
-    boolean _isOpaque = this.isOpaque();
-    boolean _not = (!_isOpaque);
-    if (_not) {
-      super.paintComponent(g);
-      return;
+    private static final long serialVersionUID = 1089473481444949272L;
+
+    public RunnerTextPane() {
+        super();
+        addFocusListener(this);
+    }
+
+    @Override
+    public void paintComponent(final Graphics g) {
+        // default for non-opaque components
+        if (isOpaque()) {
+            super.paintComponent(g);
+            return;
+        }
+
+        // use value of JTextField for consistency
+        g.setColor(UIManager.getColor("TextField.inactiveBackground"));
+        g.fillRect(0, 0, getWidth(), getHeight());
+        setOpaque(false);
+        
+        // do rest, changing opaque to ensure background is not overwritten
+        super.paintComponent(g);
+        setOpaque(true);
+    }
+
+    @Override
+    public void focusGained(final FocusEvent e) {
+        getCaret().setVisible(true);
+    }
+
+    @Override
+    public void focusLost(final FocusEvent e) {
+        getCaret().setVisible(false);
+    }
+
+    @Override
+    public void setText(final String t) {
+        super.setText(t);
+        // ensure left parts of long lines are always visible
+        setCaretPosition(0);
     }
-    g.setColor(UIManager.getColor("TextField.inactiveBackground"));
-    g.fillRect(0, 0, this.getWidth(), this.getHeight());
-    this.setOpaque(false);
-    super.paintComponent(g);
-    this.setOpaque(true);
-  }
-  
-  @Override
-  public void focusGained(final FocusEvent e) {
-    Caret _caret = this.getCaret();
-    _caret.setVisible(true);
-  }
-  
-  @Override
-  public void focusLost(final FocusEvent e) {
-    Caret _caret = this.getCaret();
-    _caret.setVisible(false);
-  }
-  
-  @Override
-  public void setText(final String t) {
-    super.setText(t);
-    this.setCaretPosition(0);
-  }
 }