JavaDocs Source

package xmltool;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import org.fxmisc.richtext.CodeArea;
import org.fxmisc.richtext.StyleSpansBuilder;

public class UIBean {

    private static CodeArea curCodeArea;

    public static CodeArea getCurCodeArea() {
        return curCodeArea;
    }

    public static void setCurCodeArea(CodeArea newCodeArea) {

        newCodeArea.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(ObservableValue<? extends String> observable, String oldText, String newText) {
                
                //make text between <>  brown
                Pattern tags = Pattern.compile("\\<(.*?)\\>");
                addSpanStyle(newCodeArea, newText, tags, "tag");
                
                //make the "<" and ">" blue
                Pattern arrows = Pattern.compile("\\<|\\>");
                addSpanStyle(newCodeArea, newText, arrows, "arrow");
                
            }
        });

        curCodeArea = newCodeArea;
    }

    private static void addSpanStyle(CodeArea codeArea, String newText, Pattern pattern, String spanClass) {
        StyleSpansBuilder<Collection<String>> spansBuilder = new StyleSpansBuilder<>();
        Matcher matcher = pattern.matcher(newText);
        int lastKwEnd = 0;
        while (matcher.find()) {
            spansBuilder.add(Collections.emptyList(), matcher.start() - lastKwEnd);
            spansBuilder.add(Collections.singleton(spanClass), matcher.end() - matcher.start());
            lastKwEnd = matcher.end();
        }
        spansBuilder.add(Collections.emptyList(), newText.length() - lastKwEnd);
        codeArea.setStyleSpans(0, spansBuilder.create());
    }
}