Question: codeArea.removeSelection delayed display

[impactCn]

First, Happy new year.

When I make a text search highlight function, I find that the selection is delayed.

demo

public class Find extends Application {

    private final static List<SelectionImpl<Collection<String>, String, Collection<String>>> SELECTIONS = new ArrayList<>();

    private CodeArea area = new CodeArea();

    private TextField findInput = new TextField();

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        area.replaceText(0, 0, "Your code goes here. \n Your code goes here.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nn\n\n\n\n\n\n\n\n\n\n\n\n");
        findInput.setBackground(new Background(new javafx.scene.layout.BackgroundFill(Color.LIGHTGRAY, null, null)));
        area.setBackground(new Background(new javafx.scene.layout.BackgroundFill(Color.WHITE, null, null)));
        findInput.setPromptText("Find");
        VBox vBox = new VBox(findInput, area);
        primaryStage.setTitle("Find");
        primaryStage.setScene(new Scene(vBox, 400, 400));
        primaryStage.show();

        findInput.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(ObservableValue<? extends String> observableValue, String s, String t1) {
                for (SelectionImpl<Collection<String>, String, Collection<String>> selection : SELECTIONS) {
                    area.removeSelection(selection);
                }
                SELECTIONS.clear();
                Pattern keyPattern = Pattern.compile(t1, Pattern.MULTILINE);
                Matcher matcher = keyPattern.matcher(area.getText());
                while (matcher.find()) {
                    addExtraSelection(matcher.start(), matcher.end());
                }
            }
        });

    }

    private void addExtraSelection(int start, int end) {
        SelectionImpl<Collection<String>, String, Collection<String>> extraSelection = new SelectionImpl<>(String.valueOf(start), area,
                path -> {
                    // make rendered selection path look like a yellow highlighter
                    path.setStrokeWidth(0);
                    path.setFill(Color.YELLOW);
                }
        );
        if (!area.addSelection(extraSelection)) {
            throw new IllegalStateException("selection was not added to area");
        }
        // select something so it is visible
        extraSelection.selectRange(start, end);
        SELECTIONS.add(extraSelection);
    }
}

Only when you slide to a new place will the highlight disappear.

[impactCn]

I solved it. Just selectRange(0, 0).

public class Find extends Application {

    private final static List<SelectionImpl<Collection<String>, String, Collection<String>>> SELECTIONS = new ArrayList<>();

    private CodeArea area = new CodeArea();

    private TextField findInput = new TextField();

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        area.replaceText(0, 0, "Your code goes here. \n Your code goes here.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nn\n\n\n\n\n\n\n\n\n\n\n\n");
        findInput.setBackground(new Background(new javafx.scene.layout.BackgroundFill(Color.LIGHTGRAY, null, null)));
        area.setBackground(new Background(new javafx.scene.layout.BackgroundFill(Color.WHITE, null, null)));
        findInput.setPromptText("Find");
        VBox vBox = new VBox(findInput, area);
        primaryStage.setTitle("Find");
        primaryStage.setScene(new Scene(vBox, 400, 400));
        primaryStage.show();

        findInput.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(ObservableValue<? extends String> observableValue, String s, String t1) {
                for (SelectionImpl<Collection<String>, String, Collection<String>> selection : SELECTIONS) {
                    selection.selectRange(0, 0);
                    area.removeSelection(selection);
                }
                SELECTIONS.clear();
                Pattern keyPattern = Pattern.compile(t1, Pattern.MULTILINE);
                Matcher matcher = keyPattern.matcher(area.getText());
                while (matcher.find()) {
                    addExtraSelection(matcher.start(), matcher.end());
                }
            }
        });

    }

    private void addExtraSelection(int start, int end) {
        SelectionImpl<Collection<String>, String, Collection<String>> extraSelection = new SelectionImpl<>(String.valueOf(start), area,
                path -> {
                    // make rendered selection path look like a yellow highlighter
                    path.setStrokeWidth(0);
                    path.setFill(Color.YELLOW);
                }
        );
        if (!area.addSelection(extraSelection)) {
            throw new IllegalStateException("selection was not added to area");
        }
        // select something so it is visible
        extraSelection.selectRange(start, end);
        SELECTIONS.add(extraSelection);
    }
}