Customize the JavaFX HTMLEditor

HTMLEditorCustomizationSample.java

import java.util.List;
import java.util.regex.Pattern;
import javafx.application.*;
import javafx.collections.FXCollections;
import javafx.event.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.effect.*;
import javafx.scene.image.*;
import javafx.scene.web.HTMLEditor;
import javafx.stage.Stage;
 
public class HTMLEditorCustomizationSample extends Application {
  // limits the fonts a user can select from in the html editor.
  private static final List<String> limitedFonts = FXCollections.observableArrayList("Arial", "Times New Roman", "Courier New", "Comic Sans MS");

  public static void main(String[] args) { launch(args); }
  @Override public void start(Stage stage) {
    // create a new html editor and show it before we start modifying it.
    final HTMLEditor htmlEditor = new HTMLEditor();
    stage.setScene(new Scene(htmlEditor));
    stage.show();
    
    // hide controls we don't need.
    hideImageNodesMatching(htmlEditor, Pattern.compile(".*(Cut|Copy|Paste).*"), 0);
    Node seperator = htmlEditor.lookup(".separator");
    seperator.setVisible(false); seperator.setManaged(false);
    
    // modify font selections.
    int i = 0;
    for (Node candidate: (htmlEditor.lookupAll("MenuButton"))) {
      // fonts are selected by the second menu in the htmlEditor.
      if (candidate instanceof MenuButton && i == 1) {
        // limit the font selections to our predefined list.
        MenuButton menuButton = (MenuButton) candidate;
        List<MenuItem> removalList = FXCollections.observableArrayList();
        final List<MenuItem> fontSelections = menuButton.getItems();
        for (MenuItem item: fontSelections) {
          if (!limitedFonts.contains(item.getText())) {
            removalList.add(item);
          }
        }
        fontSelections.removeAll(removalList);
        // Select a font from out limited font selection.
        // Selection done in Platform.runLater because if you try to do
        // the selection immediately, it won't take place.
        Platform.runLater(new Runnable() {
          @Override public void run() {
            boolean fontSelected = false;
            for (final MenuItem item: fontSelections) {
              if ("Comic Sans MS".equals(item.getText())) {
                if (item instanceof RadioMenuItem) {
                  ((RadioMenuItem) item).setSelected(true);
                  fontSelected = true;
                }
              }
            }
            if (!fontSelected && fontSelections.size() > 0 && fontSelections.get(0) instanceof RadioMenuItem) {
              ((RadioMenuItem) fontSelections.get(0)).setSelected(true);
            }
          }
        });  
      }
      i++;
    }
    // add a custom button to the top toolbar.
    Node node = htmlEditor.lookup(".top-toolbar");
    if (node instanceof ToolBar) {
      ToolBar bar = (ToolBar) node;
      ImageView graphic = new ImageView(new Image("http://bluebuddies.com/gallery/title/jpg/Smurf_Fun_100x100.jpg", 32, 32, true, true));
      graphic.setEffect(new DropShadow());
      Button smurfButton = new Button("", graphic);
      bar.getItems().add(smurfButton);
      smurfButton.setOnAction(new EventHandler<ActionEvent>() {
        @Override public void handle(ActionEvent arg0) {
          htmlEditor.setHtmlText("<font face='Comic Sans MS' color='blue'>Smurfs are having fun :-)</font>");
        }
      });
    }
  }

  // hide buttons containing nodes whose image url matches a given name pattern.
  public void hideImageNodesMatching(Node node, Pattern imageNamePattern, int depth) {
    if (node instanceof ImageView) {
      ImageView imageView = (ImageView) node;
      String url = imageView.getImage().impl_getUrl();
      if (url != null && imageNamePattern.matcher(url).matches()) {
        Node button = imageView.getParent().getParent();
        button.setVisible(false); button.setManaged(false);
      }
    }
    if (node instanceof Parent) 
      for (Node child : ((Parent) node).getChildrenUnmodifiable()) 
        hideImageNodesMatching(child, imageNamePattern, depth + 1);
  }
}

Did you by any chance encounter a rich text javafx component?

https://github.com/FXMisc/RichTextFX