package ji9079541;
import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebErrorEvent;
import javafx.scene.web.WebView;
import netscape.javascript.JSObject;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.w3c.dom.events.Event;
import org.w3c.dom.events.EventListener;
import org.w3c.dom.events.EventTarget;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.time.Duration;
import java.time.Instant;
import java.util.concurrent.*;
import java.util.logging.Logger;
public class Demo3 {
private static String HTML = """
Die Meldung
${umsEventText}
""";
private static final Logger log = Logger.getLogger(Demo3.class.getName());
private static MyHost hardReferenceForHost;
private static CompletableFuture loadSucceed;
private static CompletableFuture loadSchedule;
public static void main(String[] args) throws IOException {
log.info("starting");
Platform.startup(new Runnable() {
@Override
public void run() {
}
});
final var timer = new Timer(1000, new ActionListener() {
@Override
public void actionPerformed(final ActionEvent e) {
final var now = Instant.now();
Platform.runLater(new Runnable() {
@Override
public void run() {
final var between = Duration.between(now, Instant.now());
log.info("between = " + between);
if (between.toSeconds() > 10) {
System.exit(1);
}
}
});
}
});
timer.setRepeats(true);
timer.start();
var executor = Executors.newSingleThreadScheduledExecutor();
//we cant wait for the document to be loaded because thats broken as well, see the other bug report
executor.scheduleWithFixedDelay(new Runnable() {
@Override
public void run() {
loadSucceed = new CompletableFuture<>();
loadSchedule = new CompletableFuture<>();
load();
try {
loadSchedule.get();
loadSucceed.get(1, TimeUnit.SECONDS);
} catch (InterruptedException e) {
throw new RuntimeException(e);
} catch (ExecutionException e) {
throw new RuntimeException(e);
} catch (TimeoutException e) {
//we ran into the other bug, loads sometimes hang for no reason
log.warning("timed out waiting for load to succeed");
}
}
}, 10, 10, TimeUnit.MILLISECONDS);
}
private static void load() {
Platform.runLater(new Runnable() {
@Override
public void run() {
aLoad();
}
});
}
static void addEventListener(final Document document, final EventListener listener) {
if (document == null) {
return;
}
final EventTarget eventTarget = (EventTarget) document;
eventTarget.addEventListener("input", listener, true);
eventTarget.addEventListener("change", listener, true);
eventTarget.addEventListener("customevent", listener, true);
eventTarget.addEventListener("click", listener, true);
}
public static void aLoad() {
final var webView = new WebView();
final WebEngine engine = webView.getEngine();
webView.getEngine().getHistory().setMaxSize(0);
webView.setContextMenuEnabled(false);
webView.getEngine().documentProperty().addListener((obs, oldDoc, newDoc) -> {
log.fine("load suceeded hurraaa = ");
loadSucceed.complete(null);
stuff(engine, webView);
});
engine.loadContent(HTML);
log.fine(" expect load ");
loadSchedule.complete(null);
}
public static class MyHost {
public void processQ2() {
log.fine("Callback through javascript");
}
public void journalize(String message) {
log.fine("message = " + message);
}
}
static void stuff(WebEngine engine, WebView webView) {
final Document document = engine.getDocument();
final JSObject jsObject = (JSObject) engine.executeScript("window");
final NodeList bodyList = engine.getDocument().getElementsByTagName("body");
final Element element = (Element) bodyList.item(0);
hardReferenceForHost = new MyHost();
//because setMember uses a weak reference
jsObject.setMember("host", hardReferenceForHost);
jsObject.setMember("justToConfuseYou", new Object() {
});
engine.executeScript("window.host.processQ2();");
addEventListener(document, new EventListener() {
@Override
public void handleEvent(final Event evt) {
Platform.runLater(() -> {
// System.out.println("evt = " + evt);
});
}
});
engine.setOnError(new EventHandler() {
@Override
public void handle(final WebErrorEvent webErrorEvent) {
log.warning("Error: " + webErrorEvent.getMessage());
}
});
log.fine(" expect callback through javascript ");
webView.getEngine().executeScript("var evt = document.createEvent(\"MouseEvents\");\n" +
" evt.initMouseEvent(\"click\", true, true, window, 1, 0, 0, 0, 0,\n" +
" false, false, false, false, 0, null);\n" +
"\n" +
" var cb = document.getElementById(\"boxyes\");\n" +
" cb.dispatchEvent(evt);");
}
}