import javafx.application.*;
import javafx.scene.*;
import javafx.scene.layout.*;
import javafx.scene.paint.*;
import javafx.scene.shape.*;
import javafx.scene.text.*;
import javafx.stage.*;

public class Highlight extends Application {

    public static void main(String[] args) { launch(args); }

    static final String str1 = "This sentence is not highlighted.";
    static final String str2 = "This sentence is highlighted in blue.";
    static final String str3 = "This sentence is highlighted in red.";

    @Override public void start(Stage stage) {
        Text text = new Text(str1 + " " + str2 + " " + str1 + " " + str3 + " " + str1);
        text.setWrappingWidth(100);

        HighlightPane highlightPane = new HighlightPane(text);
        highlightPane.highlight(str2, Color.LIGHTBLUE);
        highlightPane.highlight(str3, Color.RED);

        stage.setScene(new Scene(highlightPane));
        stage.show();
    }

    static class HighlightPane extends StackPane {
        private Text text;
        private Group selectionHighlightGroup = new Group();

        public HighlightPane(Text text) {
            this.text = text;

            getChildren().add(selectionHighlightGroup);
            getChildren().add(text);
        }

        public void highlight(String highlightStr, Color color) {
            String str = text.getText();
            int index = -1;
            while ((index = str.indexOf(highlightStr, index + 1)) >= 0) {
                text.setImpl_selectionStart(index);
                text.setImpl_selectionEnd(index + highlightStr.length());
                PathElement[] selectionShape = text.getImpl_selectionShape();
                if (selectionShape != null) {
                    Path selectionHighlightPath = new Path();
                    selectionHighlightPath.setManaged(false);
                    selectionHighlightPath.setStroke(null);
                    selectionHighlightPath.getElements().addAll(selectionShape);
                    selectionHighlightGroup.getChildren().add(selectionHighlightPath);
                    selectionHighlightPath.setFill(color);
                }
            }
        }

        @Override public void layoutChildren() {
            super.layoutChildren();

            selectionHighlightGroup.setLayoutX(text.getLayoutX());
            selectionHighlightGroup.setLayoutY(text.getLayoutY());
        }
    }
}