Java FX RichTextView API

1. Java FX RichTextView API

package com.home.fx;

import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.control.SeparatorMenuItem;
import javafx.scene.input.Clipboard;
import org.fxmisc.richtext.CodeArea;
import org.fxmisc.richtext.LineNumberFactory;

public class FxRichText extends CodeArea {

	//VirtualizedScrollPane scroll;
	CodeArea text;
	int fontSize = 14;

	public FxRichText(Scene scene) {
		text = this; //new CodeArea();
		text.setStyle("-fx-font: " + fontSize + " arial;");
		text.setParagraphGraphicFactory(LineNumberFactory.get(text));

		ContextMenu menu = new ContextMenu();
		addMenuItem(menu, "Clear", () -> text.clear() );
		addMenuItem(menu, "Copy", () -> text.copy() );
		addMenuItem(menu, "Paste", () -> text.paste());
		addMenuItem(menu, "Copy All", () -> { text.selectAll(); text.copy(); text.deselect(); });
		addMenuItem(menu, "Paste All", () -> { text.clear(); text.paste(); } );
		addMenuItem(menu, "Paste Html", this::pasteHtml);
		addSeparator(menu);
		addMenuItem(menu, "Wrap", this::wrapToggle);
		addMenuItem(menu, "Font(-)", this::fontDown);
		addMenuItem(menu, "Font(+)", this::fontUp);
		text.setContextMenu(menu);

		setSyntaxHighlightPUml(scene);

		/*
		scroll = new VirtualizedScrollPane(text);
		scroll.setVbarPolicy(ScrollBarPolicy.ALWAYS); //)ALWAYS;
		scroll.setHbarPolicy(ScrollBarPolicy.AS_NEEDED);
		//scroll.setPannable(true);
		//scroll.setFitToWidth(true);
		//scroll.setFitToHeight(true);
		*/
	}

	public Node getLayout() {
		return text;
	}
	
	public void setSyntaxHighlightPUml(Scene scene) {
		/*
		scene.getStylesheets().add(FxRichText.class.getResource("puml-keywords.css").toExternalForm());

		text.multiPlainChanges()
        .successionEnds(Duration.ofMillis(500))
        .subscribe(ignore -> text.setStyleSpans(0, FxRichTextPUml.computeHighlighting(text.getText())));
		*/
	}
	
	public void setText(String data) { text.clear(); text.appendText(data); }	
	public void append(String data) { text.appendText(data); }
	public void insert(int index, String data) { text.insertText(index, data); } 
	public void wrapToggle() { text.setWrapText( ! text.isWrapText() ); }
	public void showLineNumber() { text.setParagraphGraphicFactory(LineNumberFactory.get(text)); }	
	public void pasteHtml() {
		if( Clipboard.getSystemClipboard().hasHtml() ) {
			text.clear();
			text.appendText( Clipboard.getSystemClipboard().getHtml() );
		}
	}
	public void fontDown() {
		if( fontSize > 1 ) {
			fontSize--;
			//text.setStyle("-fx-font: " + fontSize + " arial;");
			text.setStyle("-fx-font-size: " + fontSize + ";");
		}
	}
	public void fontUp() {
		if( fontSize < 127 ) {
			fontSize++;
			text.setStyle("-fx-font-size: " + fontSize + ";");
		}		
	}
	public void addMenuItem(ContextMenu menu, String title, Runnable runnable) {
		MenuItem item = new MenuItem();
		item.setText(title);
		item.setOnAction(e -> runnable.run());
		menu.getItems().add(item);
	}
	public void addSeparator(ContextMenu menu) {
		menu.getItems().add(new SeparatorMenuItem());
	}	
}