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A presentation provider to show JavaFX WebView
when a Java/HTML based application is about to boot.
The newest version!
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.netbeans.html.boot.fx;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.prefs.Preferences;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.geometry.Rectangle2D;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Text;
import javafx.scene.web.PopupFeatures;
import javafx.scene.web.PromptData;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebEvent;
import javafx.scene.web.WebView;
import javafx.stage.Modality;
import javafx.stage.Screen;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import javafx.stage.Window;
import javafx.stage.WindowEvent;
import javafx.util.Callback;
/** This is an implementation class, to implement browser builder API. Just
* include this JAR on classpath and the browser builder API will find
* this implementation automatically.
*/
public class FXBrwsr extends Application {
private static final Logger LOG = Logger.getLogger(FXBrwsr.class.getName());
private static FXBrwsr INSTANCE;
private static final CountDownLatch FINISHED = new CountDownLatch(1);
private BorderPane root;
public static synchronized WebView findWebView(final URL url, final AbstractFXPresenter onLoad) {
if (INSTANCE == null) {
final String callee = findCalleeClassName();
Executors.newFixedThreadPool(1).submit(new Runnable() {
@Override
public void run() {
if (!Platform.isFxApplicationThread()) {
try {
Platform.runLater(this);
} catch (IllegalStateException ex) {
try {
FXBrwsr.launch(FXBrwsr.class, callee);
} catch (Throwable t) {
t.printStackTrace();
} finally {
FINISHED.countDown();
}
}
} else {
FXBrwsr brwsr = new FXBrwsr();
brwsr.start(new Stage(), callee);
INSTANCE = brwsr;
FINISHED.countDown();
}
}
});
}
while (INSTANCE == null) {
try {
FXBrwsr.class.wait();
} catch (InterruptedException ex) {
// wait more
}
}
if (!Platform.isFxApplicationThread()) {
final WebView[] arr = {null};
final CountDownLatch waitForResult = new CountDownLatch(1);
Platform.runLater(new Runnable() {
@Override
public void run() {
arr[0] = INSTANCE.newView(url, onLoad);
waitForResult.countDown();
}
});
for (;;) {
try {
waitForResult.await();
break;
} catch (InterruptedException ex) {
LOG.log(Level.INFO, null, ex);
}
}
return arr[0];
} else {
return INSTANCE.newView(url, onLoad);
}
}
static synchronized Stage findStage() throws InterruptedException {
while (INSTANCE == null) {
FXBrwsr.class.wait();
}
return INSTANCE.stage;
}
private Stage stage;
@Override
public void start(Stage primaryStage) throws Exception {
start(primaryStage, this.getParameters().getRaw().get(0));
}
final void start(Stage primaryStage, String callee) {
BorderPane r = new BorderPane();
Object[] arr = findInitialSize(callee);
Scene scene = new Scene(r, (Double)arr[2], (Double)arr[3]);
primaryStage.setScene(scene);
this.root = r;
this.stage = primaryStage;
synchronized (FXBrwsr.class) {
INSTANCE = this;
FXBrwsr.class.notifyAll();
}
primaryStage.setX((Double)arr[0]);
primaryStage.setY((Double)arr[1]);
if (arr[4] != null) {
scene.getWindow().setOnCloseRequest((EventHandler) arr[4]);
}
if (Boolean.getBoolean("fxpresenter.headless")) {
return;
}
primaryStage.show();
}
static String findCalleeClassName() {
StackTraceElement[] frames = new Exception().getStackTrace();
for (StackTraceElement e : frames) {
String cn = e.getClassName();
if (cn.startsWith("org.netbeans.html.")) { // NOI18N
continue;
}
if (cn.startsWith("net.java.html.")) { // NOI18N
continue;
}
if (cn.startsWith("java.")) { // NOI18N
continue;
}
if (cn.startsWith("javafx.")) { // NOI18N
continue;
}
if (cn.startsWith("com.sun.")) { // NOI18N
continue;
}
return cn;
}
return "org.netbeans.html"; // NOI18N
}
private static Object[] findInitialSize(String callee) {
final Preferences prefs = Preferences.userRoot().node(callee.replace('.', '/'));
Rectangle2D screen = Screen.getPrimary().getBounds();
double x = prefs.getDouble("x", screen.getWidth() * 0.05); // NOI18N
double y = prefs.getDouble("y", screen.getHeight() * 0.05); // NOI18N
double width = prefs.getDouble("width", screen.getWidth() * 0.9); // NOI18N
double height = prefs.getDouble("height", screen.getHeight() * 0.9); // NOI18N
Object[] arr = {
x, y, width, height, null
};
if (!callee.equals("org.netbeans.html")) { // NOI18N
arr[4] = new EventHandler() {
@Override
public void handle(WindowEvent event) {
Window window = (Window) event.getSource();
prefs.putDouble("x", window.getX()); // NOI18N
prefs.putDouble("y", window.getY()); // NOI18N
prefs.putDouble("width", window.getWidth()); // NOI18N
prefs.putDouble("height", window.getHeight()); // NOI18N
}
};
}
return arr;
}
private WebView newView(final URL url, final AbstractFXPresenter onLoad) {
final WebView view = new WebView();
view.setContextMenuEnabled(false);
Stage newStage;
BorderPane bp;
if (root == null) {
newStage = new Stage();
newStage.initOwner(stage);
bp = new BorderPane();
newStage.setScene(new Scene(bp));
newStage.show();
} else {
bp = root;
newStage = stage;
root = null;
}
attachHandlers(view, newStage);
final FXConsole fxConsole = new FXConsole(view, newStage);
bp.setCenter(view);
final Worker w = view.getEngine().getLoadWorker();
w.stateProperty().addListener(new ChangeListener() {
private String previous;
@Override
public void changed(ObservableValue ov, Worker.State t, Worker.State newState) {
if (newState.equals(Worker.State.SUCCEEDED)) {
if (checkValid()) {
fxConsole.register(view.getEngine());
onLoad.onPageLoad();
}
}
if (newState.equals(Worker.State.FAILED)) {
throw new IllegalStateException("Failed to load " + url);
}
}
private boolean checkValid() {
final String crnt = view.getEngine().getLocation();
if (previous != null && !previous.equals(crnt)) {
w.stateProperty().removeListener(this);
return false;
}
previous = crnt;
return true;
}
});
fxConsole.observeWebViewTitle();
return view;
}
private static void attachHandlers(final WebView view, final Stage owner) {
view.getEngine().setOnAlert(new EventHandler>() {
@Override
public void handle(WebEvent t) {
final Stage dialogStage = new Stage();
dialogStage.initModality(Modality.WINDOW_MODAL);
dialogStage.initOwner(owner);
ResourceBundle r = ResourceBundle.getBundle("org/netbeans/html/boot/fx/Bundle"); // NOI18N
dialogStage.setTitle(r.getString("AlertTitle")); // NOI18N
final Button button = new Button(r.getString("AlertCloseButton")); // NOI18N
final Text text = new Text(t.getData());
VBox box = new VBox();
box.setAlignment(Pos.CENTER);
box.setSpacing(10);
box.setPadding(new Insets(10));
box.getChildren().addAll(text, button);
dialogStage.setScene(new Scene(box));
button.setCancelButton(true);
button.setOnAction(new CloseDialogHandler(dialogStage, null));
dialogStage.centerOnScreen();
dialogStage.showAndWait();
}
});
view.getEngine().setConfirmHandler(new Callback() {
@Override
public Boolean call(String question) {
final Stage dialogStage = new Stage();
dialogStage.initModality(Modality.WINDOW_MODAL);
dialogStage.initOwner(owner);
ResourceBundle r = ResourceBundle.getBundle("org/netbeans/html/boot/fx/Bundle"); // NOI18N
dialogStage.setTitle(r.getString("ConfirmTitle")); // NOI18N
final Button ok = new Button(r.getString("ConfirmOKButton")); // NOI18N
final Button cancel = new Button(r.getString("ConfirmCancelButton")); // NOI18N
final Text text = new Text(question);
final Insets ins = new Insets(10);
final VBox box = new VBox();
box.setAlignment(Pos.CENTER);
box.setSpacing(10);
box.setPadding(ins);
final HBox buttons = new HBox(10);
buttons.getChildren().addAll(ok, cancel);
buttons.setAlignment(Pos.CENTER);
buttons.setPadding(ins);
box.getChildren().addAll(text, buttons);
dialogStage.setScene(new Scene(box));
ok.setCancelButton(false);
final boolean[] res = new boolean[1];
ok.setOnAction(new CloseDialogHandler(dialogStage, res));
cancel.setCancelButton(true);
cancel.setOnAction(new CloseDialogHandler(dialogStage, null));
dialogStage.centerOnScreen();
dialogStage.showAndWait();
return res[0];
}
});
view.getEngine().setPromptHandler(new Callback() {
@Override
public String call(PromptData prompt) {
final Stage dialogStage = new Stage();
dialogStage.initModality(Modality.WINDOW_MODAL);
dialogStage.initOwner(owner);
ResourceBundle r = ResourceBundle.getBundle("org/netbeans/html/boot/fx/Bundle"); // NOI18N
dialogStage.setTitle(r.getString("PromptTitle")); // NOI18N
final Button ok = new Button(r.getString("PromptOKButton")); // NOI18N
final Button cancel = new Button(r.getString("PromptCancelButton")); // NOI18N
final Text text = new Text(prompt.getMessage());
final TextField line = new TextField();
if (prompt.getDefaultValue() != null) {
line.setText(prompt.getDefaultValue());
}
final Insets ins = new Insets(10);
final VBox box = new VBox();
box.setAlignment(Pos.CENTER);
box.setSpacing(10);
box.setPadding(ins);
final HBox buttons = new HBox(10);
buttons.getChildren().addAll(ok, cancel);
buttons.setAlignment(Pos.CENTER);
buttons.setPadding(ins);
box.getChildren().addAll(text, line, buttons);
dialogStage.setScene(new Scene(box));
ok.setCancelButton(false);
final boolean[] res = new boolean[1];
ok.setOnAction(new CloseDialogHandler(dialogStage, res));
cancel.setCancelButton(true);
cancel.setOnAction(new CloseDialogHandler(dialogStage, null));
dialogStage.centerOnScreen();
dialogStage.showAndWait();
return res[0] ? line.getText() : null;
}
});
view.getEngine().setCreatePopupHandler(new Callback() {
@Override
public WebEngine call(PopupFeatures param) {
final Stage stage = new Stage(StageStyle.UTILITY);
stage.initOwner(owner);
final WebView popUpView = new WebView();
stage.setScene(new Scene(popUpView));
FXConsole fxConsole = new FXConsole(popUpView, stage);
fxConsole.observeWebViewTitle();
stage.show();
return popUpView.getEngine();
}
});
}
static void waitFinished() {
for (;;) {
try {
FINISHED.await();
break;
} catch (InterruptedException ex) {
LOG.log(Level.INFO, null, ex);
}
}
}
private static final class CloseDialogHandler implements EventHandler {
private final Stage dialogStage;
private final boolean[] res;
public CloseDialogHandler(Stage dialogStage, boolean[] res) {
this.dialogStage = dialogStage;
this.res = res;
}
@Override
public void handle(ActionEvent t) {
dialogStage.close();
if (res != null) {
res[0] = true;
}
}
}
}
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