Lots of cleanup.

pom.xml

@@ -56,5 +56,11 @@
             <artifactId>jnativehook</artifactId>
             <version>2.1.0</version>
         </dependency>
+
+        <dependency>
+            <groupId>com.formdev</groupId>
+            <artifactId>flatlaf</artifactId>
+            <version>1.0-rc3</version>
+        </dependency>
     </dependencies>
 </project>

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

@@ -1,5 +1,6 @@
 package nl.andrewlalis.blockbookbinder;
 
+import com.formdev.flatlaf.FlatDarkLaf;
 import nl.andrewlalis.blockbookbinder.view.MainFrame;
 
 import javax.swing.*;
@@ -10,6 +11,7 @@ import javax.swing.*;
 public class BlockBookBinder {
 	public static void main(String[] args) {
 		SwingUtilities.invokeLater(() -> {
+			FlatDarkLaf.install();
 			var mainFrame = new MainFrame();
 			mainFrame.setupAndShow();
 		});

src/main/java/nl/andrewlalis/blockbookbinder/control/ConvertToBookActionListener.java

@@ -1,7 +1,7 @@
 package nl.andrewlalis.blockbookbinder.control;
 
 import nl.andrewlalis.blockbookbinder.model.build.BookBuilder;
-import nl.andrewlalis.blockbookbinder.view.BookPreviewPanel;
+import nl.andrewlalis.blockbookbinder.view.book.BookPreviewPanel;
 import nl.andrewlalis.blockbookbinder.view.SourceTextPanel;
 
 import java.awt.event.ActionEvent;

src/main/java/nl/andrewlalis/blockbookbinder/control/export/BookExporter.java

@@ -39,7 +39,7 @@ public class BookExporter implements Runnable {
 	@Setter
 	private volatile boolean nextPageRequested;
 
-	private final PagePasteListener pagePasteListener;
+	private final ExporterKeyListener exporterKeyListener;
 	private final Clipboard clipboard;
 	private Robot robot;
 
@@ -61,7 +61,7 @@ public class BookExporter implements Runnable {
 		this.beginningExportClip = this.loadAudioClip(ApplicationProperties.getProp("export_dialog.beginning_export"));
 		this.finishClip = this.loadAudioClip(ApplicationProperties.getProp("export_dialog.finish_sound"));
 		this.clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
-		this.pagePasteListener = new PagePasteListener(this);
+		this.exporterKeyListener = new ExporterKeyListener(this);
 		if (this.autoPaste) { // Only initialize the robot if we'll need it.
 			try {
 				this.robot = new Robot();
@@ -193,7 +193,7 @@ public class BookExporter implements Runnable {
 			logger.setLevel(Level.WARNING);
 			logger.setUseParentHandlers(false);
 			GlobalScreen.registerNativeHook();
-			GlobalScreen.addNativeKeyListener(this.pagePasteListener);
+			GlobalScreen.addNativeKeyListener(this.exporterKeyListener);
 		} catch (NativeHookException nativeHookException) {
 			System.err.println("Could not register native hook.");
 			nativeHookException.printStackTrace();
@@ -202,7 +202,7 @@ public class BookExporter implements Runnable {
 
 	private void stopNativeListener() {
 		try {
-			GlobalScreen.removeNativeKeyListener(this.pagePasteListener);
+			GlobalScreen.removeNativeKeyListener(this.exporterKeyListener);
 			GlobalScreen.unregisterNativeHook();
 		} catch (NativeHookException nativeHookException) {
 			System.err.println("Could not unregister a native hook.");
@@ -243,9 +243,7 @@ public class BookExporter implements Runnable {
 	}
 
 	private void updateStatusLabel(String text) {
-		SwingUtilities.invokeLater(() -> {
+		SwingUtilities.invokeLater(() -> this.statusPanel.getStatusLabel().setText(text));
-			this.statusPanel.getStatusLabel().setText(text);
-		});
 	}
 
 	private void updateStatusProgressBar(int nextPage) {
@@ -257,8 +255,6 @@ public class BookExporter implements Runnable {
 	}
 
 	private void addStatusMessage(String message) {
-		SwingUtilities.invokeLater(() -> {
+		SwingUtilities.invokeLater(() -> this.statusPanel.getOutputTextArea().append(message + "\n"));
-			this.statusPanel.getOutputTextArea().append(message + "\n");
-		});
 	}
 }

src/main/java/nl/andrewlalis/blockbookbinder/control/export/ExporterKeyListener.java

@@ -3,10 +3,14 @@ package nl.andrewlalis.blockbookbinder.control.export;
 import org.jnativehook.keyboard.NativeKeyEvent;
 import org.jnativehook.keyboard.NativeKeyListener;
 
-public class PagePasteListener implements NativeKeyListener {
+/**
-	private BookExporter exporterRunnable;
+ * Native key listener that's used during the export process, to detect when the
+ * user performs certain key actions outside of the focus of this program.
+ */
+public class ExporterKeyListener implements NativeKeyListener {
+	private final BookExporter exporterRunnable;
 
-	public PagePasteListener(BookExporter exporterRunnable) {
+	public ExporterKeyListener(BookExporter exporterRunnable) {
 		this.exporterRunnable = exporterRunnable;
 	}
 

src/main/java/nl/andrewlalis/blockbookbinder/model/Book.java

@@ -1,6 +1,7 @@
 package nl.andrewlalis.blockbookbinder.model;
 
 import lombok.Getter;
+import nl.andrewlalis.blockbookbinder.util.ApplicationProperties;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -35,6 +36,20 @@ public class Book {
 		return book;
 	}
 
+	public List<Book> splitByPageLimit() {
+		final int pagesPerBook = ApplicationProperties.getIntProp("book.max_pages");
+		List<Book> books = new ArrayList<>((this.getPageCount() / pagesPerBook) + 1);
+		Book currentBook = new Book();
+		for (BookPage page : this.getPages()) {
+			currentBook.addPage(page.copy());
+			if (currentBook.getPageCount() == pagesPerBook) {
+				books.add(currentBook);
+				currentBook = new Book();
+			}
+		}
+		return books;
+	}
+
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder("Book of " + this.getPageCount() + " pages:\n");

src/main/java/nl/andrewlalis/blockbookbinder/model/BookPage.java

@@ -13,7 +13,7 @@ public class BookPage {
 	}
 
 	public boolean addLine(String line) {
-		if (this.lines.size() == ApplicationProperties.getIntProp("book.page_max_lines")) {
+		if (this.lines.size() >= ApplicationProperties.getIntProp("book.page_max_lines")) {
 			return false;
 		}
 		this.lines.add(line);
@@ -24,8 +24,24 @@ public class BookPage {
 		return !this.lines.isEmpty();
 	}
 
+	public BookPage copy() {
+		BookPage c = new BookPage();
+		for (String line : this.lines) {
+			c.addLine(line);
+		}
+		return c;
+	}
+
 	@Override
 	public String toString() {
 		return String.join("\n", this.lines);
 	}
+
+	public static BookPage fromString(String s) {
+		BookPage p = new BookPage();
+		for (String line : s.split("\n")) {
+			p.addLine(line);
+		}
+		return p;
+	}
 }

src/main/java/nl/andrewlalis/blockbookbinder/model/CharWidthMapper.java

@@ -1,11 +1,15 @@
 package nl.andrewlalis.blockbookbinder.model;
 
+import lombok.Getter;
 import nl.andrewlalis.blockbookbinder.util.ApplicationProperties;
 
 import java.util.HashMap;
 import java.util.Map;
 
 public class CharWidthMapper {
+	@Getter
+	private static final CharWidthMapper instance = new CharWidthMapper();
+
 	private final Map<Character, Integer> charWidthMap;
 
 	public CharWidthMapper() {

src/main/java/nl/andrewlalis/blockbookbinder/model/build/BookBuilder.java

@@ -9,8 +9,6 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class BookBuilder {
-	private final CharWidthMapper charWidthMapper = new CharWidthMapper();
-
 	/**
 	 * Builds a full book of pages from the given source text.
 	 * @param source The source text to convert.
@@ -60,7 +58,7 @@ public class BookBuilder {
 			sourceIndex++;
 			symbolBuilder.setLength(0);
 			symbolBuilder.append(c);
-			int symbolWidth = this.charWidthMapper.getWidth(c);
+			int symbolWidth = CharWidthMapper.getInstance().getWidth(c);
 
 			// Since there's a 1-pixel gap between characters, add it to the width if this isn't the first char.
 			if (lineBuilder.length() > 0) {
@@ -88,7 +86,7 @@ public class BookBuilder {
 				) {
 					char nextChar = sourceChars[sourceIndex];
 					symbolBuilder.append(nextChar);
-					symbolWidth += 1 + this.charWidthMapper.getWidth(nextChar);
+					symbolWidth += 1 + CharWidthMapper.getInstance().getWidth(nextChar);
 					sourceIndex++;
 				}
 			}

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

@@ -3,6 +3,7 @@ package nl.andrewlalis.blockbookbinder.view;
 import nl.andrewlalis.blockbookbinder.model.Book;
 import nl.andrewlalis.blockbookbinder.util.ApplicationProperties;
 import nl.andrewlalis.blockbookbinder.view.about.AboutDialog;
+import nl.andrewlalis.blockbookbinder.view.book.BookPreviewPanel;
 import nl.andrewlalis.blockbookbinder.view.export.ExportToBookDialog;
 
 import javax.swing.*;
@@ -13,11 +14,11 @@ import java.net.URL;
  * The main window of the application.
  */
 public class MainFrame extends JFrame {
-
 	public void setupAndShow() {
-		final int width = Integer.parseInt(ApplicationProperties.getProp("frame.default_width"));
+		this.setPreferredSize(new Dimension(
-		final int height = Integer.parseInt(ApplicationProperties.getProp("frame.default_height"));
+				ApplicationProperties.getIntProp("frame.default_width"),
-		this.setPreferredSize(new Dimension(width, height));
+				ApplicationProperties.getIntProp("frame.default_height")
+		));
 		this.setTitle(ApplicationProperties.getProp("frame.title"));
 		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
 		final URL iconUrl = this.getClass().getClassLoader().getResource("images/book_and_quill.png");

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

@@ -2,6 +2,7 @@ package nl.andrewlalis.blockbookbinder.view;
 
 import nl.andrewlalis.blockbookbinder.control.CleanSourceActionListener;
 import nl.andrewlalis.blockbookbinder.control.ConvertToBookActionListener;
+import nl.andrewlalis.blockbookbinder.view.book.BookPreviewPanel;
 
 import javax.swing.*;
 import javax.swing.border.EmptyBorder;

src/main/java/nl/andrewlalis/blockbookbinder/view/about/AboutDialog.java

@@ -9,7 +9,6 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.stream.Collectors;
 
@@ -31,6 +30,7 @@ public class AboutDialog extends JDialog {
 		textPane.setEditable(false);
 		textPane.setContentType("text/html");
 		textPane.setText(this.getAboutHtml());
+		textPane.setCaretPosition(0);
 		textPane.addHyperlinkListener(e -> {
 			try {
 				if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {

src/main/java/nl/andrewlalis/blockbookbinder/view/book/BookPageDocumentFilter.java

@@ -0,0 +1,23 @@
+package nl.andrewlalis.blockbookbinder.view.book;
+
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.DocumentFilter;
+
+public class BookPageDocumentFilter extends DocumentFilter {
+
+	@Override
+	public void remove(FilterBypass fb, int offset, int length) throws BadLocationException {
+		super.remove(fb, offset, length);
+	}
+
+	@Override
+	public void insertString(FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException {
+		super.insertString(fb, offset, string, attr);
+	}
+
+	@Override
+	public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException {
+		super.replace(fb, offset, length, text, attrs);
+	}
+}

src/main/java/nl/andrewlalis/blockbookbinder/view/book/BookPreviewPanel.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.blockbookbinder.view;
+package nl.andrewlalis.blockbookbinder.view.book;
 
 import lombok.Getter;
 import nl.andrewlalis.blockbookbinder.model.Book;