Remove unused import.

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>nl.andrewlalis</groupId>
     <artifactId>BlockBookBinder</artifactId>
-    <version>1.3.0</version>
+    <version>1.3.1</version>
 
     <properties>
         <maven.compiler.source>17</maven.compiler.source>

src/main/java/nl/andrewlalis/blockbookbinder/BlockBookBinder.java

@@ -1,7 +1,6 @@
 package nl.andrewlalis.blockbookbinder;
 
 import com.formdev.flatlaf.FlatDarkLaf;
-import nl.andrewlalis.blockbookbinder.util.VersionReader;
 import nl.andrewlalis.blockbookbinder.view.MainFrame;
 
 import javax.swing.*;
@@ -10,8 +9,6 @@ import javax.swing.*;
  * The main class for the application.
  */
 public class BlockBookBinder {
-	public static final String VERSION = VersionReader.getVersion();
-
 	public static void main(String[] args) {
 		SwingUtilities.invokeLater(() -> {
 			FlatDarkLaf.setup();

src/main/java/nl/andrewlalis/blockbookbinder/control/source/CompileFromSourceAction.java

@@ -8,6 +8,7 @@ import nl.andrewlalis.blockbookbinder.view.SourceTextPanel;
 import nl.andrewlalis.blockbookbinder.view.book.BookPreviewPanel;
 
 import javax.swing.*;
+import java.awt.*;
 import java.awt.event.ActionEvent;
 
 public class CompileFromSourceAction extends AbstractAction {
@@ -26,6 +27,15 @@ public class CompileFromSourceAction extends AbstractAction {
 
 	@Override
 	public void actionPerformed(ActionEvent e) {
+		String text = this.sourceTextPanel.getSourceText();
+		if (text.isBlank()) {
+			JOptionPane.showMessageDialog(
+					SwingUtilities.getWindowAncestor((Component) e.getSource()),
+					"No source text to compile.\nEnter some text into the \"Source Text\" panel first.",
+					"No Source Text",
+					JOptionPane.WARNING_MESSAGE
+			);
+		} else {
 			this.bookPreviewPanel.setBook(
 				new BookBuilder(
 					ApplicationProperties.getIntProp("book.page_max_lines"),
@@ -35,3 +45,4 @@ public class CompileFromSourceAction extends AbstractAction {
 			);
 		}
 	}
+}

src/main/java/nl/andrewlalis/blockbookbinder/util/VersionReader.java

@@ -1,30 +0,0 @@
-package nl.andrewlalis.blockbookbinder.util;
-
-import org.apache.maven.model.Model;
-import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
-import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
-
-import java.io.File;
-import java.io.FileReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-
-public class VersionReader {
-	public static String getVersion() {
-		MavenXpp3Reader reader = new MavenXpp3Reader();
-		try {
-			Model model;
-			if ((new File("pom.xml")).exists()) {
-				model = reader.read(new FileReader("pom.xml"));
-			} else {
-				model = reader.read(new InputStreamReader(
-						VersionReader.class.getResourceAsStream("/META-INF/maven/nl.andrewlalis/BlockBookBinder/pom.xml")
-				));
-			}
-			return model.getVersion();
-		} catch (IOException | XmlPullParserException e) {
-			e.printStackTrace();
-			return "Unknown";
-		}
-	}
-}

src/main/java/nl/andrewlalis/blockbookbinder/view/MainFrame.java

@@ -1,6 +1,5 @@
 package nl.andrewlalis.blockbookbinder.view;
 
-import nl.andrewlalis.blockbookbinder.BlockBookBinder;
 import nl.andrewlalis.blockbookbinder.control.export.ExportBookToMinecraftAction;
 import nl.andrewlalis.blockbookbinder.control.source.CleanSourceAction;
 import nl.andrewlalis.blockbookbinder.control.source.CompileFromSourceAction;
@@ -22,7 +21,7 @@ public class MainFrame extends JFrame {
 				ApplicationProperties.getIntProp("frame.default_width"),
 				ApplicationProperties.getIntProp("frame.default_height")
 		));
-		this.setTitle(ApplicationProperties.getProp("frame.title") + " Version " + BlockBookBinder.VERSION);
+		this.setTitle(ApplicationProperties.getProp("frame.title") + " Version " + ApplicationProperties.getProp("version"));
 		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
 		final URL iconUrl = this.getClass().getClassLoader().getResource("images/book_and_quill.png");
 		if (iconUrl != null) {

src/main/resources/application.properties

@@ -1,4 +1,4 @@
-version=1.3.0
+version=1.3.1
 
 # Settings for the application's GUI.
 frame.title=Block Book Binder