/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, version 2 of the License.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.bck2brwsr.launcher.fximpl;

 import java.util.List;

 import java.util.TooManyListenersException;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javafx.application.Application;

 import javafx.application.Platform;

 import javafx.beans.value.ChangeListener;

 import javafx.beans.value.ObservableValue;

 import javafx.event.ActionEvent;

 import javafx.event.EventHandler;

 import javafx.geometry.HPos;

 import javafx.geometry.Insets;

 import javafx.geometry.Pos;

 import javafx.geometry.VPos;

 import javafx.scene.Node;

 import javafx.scene.Scene;

 import javafx.scene.control.Button;

 import javafx.scene.layout.ColumnConstraints;

 import javafx.scene.layout.GridPane;

 import javafx.scene.layout.Pane;

 import javafx.scene.layout.Priority;

 import javafx.scene.layout.VBox;

 import javafx.scene.text.Text;

 import javafx.scene.web.WebEngine;

 import javafx.scene.web.WebEvent;

 import javafx.scene.web.WebView;

 import javafx.stage.Modality;

 import javafx.stage.Stage;

 import netscape.javascript.JSObject;

 /**

  * Demonstrates a WebView object accessing a web page.

  *

  * @see javafx.scene.web.WebView

  * @see javafx.scene.web.WebEngine

  */

 public class FXBrwsr extends Application {

     private static final Logger LOG = Logger.getLogger(FXBrwsr.class.getName());

     @Override

     public void start(Stage primaryStage) throws Exception {

         Pane root = new WebViewPane(getParameters().getUnnamed());

         primaryStage.setScene(new Scene(root, 1024, 768));

         LOG.info("Showing the stage");

         primaryStage.show();

         LOG.log(Level.INFO, "State shown: {0}", primaryStage.isShowing());

     }

     /**

      * Create a resizable WebView pane

      */

     private class WebViewPane extends Pane {

         private final JVMBridge bridge = new JVMBridge();

         public WebViewPane(List<String> params) {

             LOG.log(Level.INFO, "Initializing WebView with {0}", params);

             VBox.setVgrow(this, Priority.ALWAYS);

             setMaxWidth(Double.MAX_VALUE);

             setMaxHeight(Double.MAX_VALUE);

             WebView view = new WebView();

             view.setMinSize(500, 400);

             view.setPrefSize(500, 400);

             final WebEngine eng = view.getEngine();

             try {

                 JVMBridge.addBck2BrwsrLoad(new InitBck2Brwsr(eng));

             } catch (TooManyListenersException ex) {

                 LOG.log(Level.SEVERE, null, ex);

             }

             if (params.size() > 0) {

                 LOG.log(Level.INFO, "loading page {0}", params.get(0));

                 eng.load(params.get(0));

                 LOG.fine("back from load");

             }

             eng.setOnAlert(new EventHandler<WebEvent<String>>() {

                 @Override

                 public void handle(WebEvent<String> t) {

                     final Stage dialogStage = new Stage();

                     dialogStage.initModality(Modality.WINDOW_MODAL);

                     dialogStage.setTitle("Warning");

                     final Button button = new Button("Close");

                     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 EventHandler<ActionEvent>() {

                         @Override

                         public void handle(ActionEvent t) {

                             dialogStage.close();

                         }

                     });

                     dialogStage.centerOnScreen();

                     dialogStage.showAndWait();

                 }

             });

             GridPane grid = new GridPane();

             grid.setVgap(5);

             grid.setHgap(5);

             GridPane.setConstraints(view, 0, 1, 2, 1, HPos.CENTER, VPos.CENTER, Priority.ALWAYS, Priority.ALWAYS);

             grid.getColumnConstraints().addAll(new ColumnConstraints(100, 100, Double.MAX_VALUE, Priority.ALWAYS, HPos.CENTER, true), new ColumnConstraints(40, 40, 40, Priority.NEVER, HPos.CENTER, true));

             grid.getChildren().addAll(view);

             getChildren().add(grid);

         }

         boolean initBck2Brwsr(WebEngine webEngine) {

             JSObject jsobj = (JSObject) webEngine.executeScript("window");

             LOG.log(Level.FINE, "window: {0}", jsobj);

             Object prev = jsobj.getMember("bck2brwsr");

             if ("undefined".equals(prev)) {

                 System.getProperties().put("webEngine", webEngine);

                 jsobj.setMember("bck2brwsr", bridge);

                 return true;

             }

             return false;

         }

         @Override

         protected void layoutChildren() {

             List<Node> managed = getManagedChildren();

             double width = getWidth();

             double height = getHeight();

             double top = getInsets().getTop();

             double right = getInsets().getRight();

             double left = getInsets().getLeft();

             double bottom = getInsets().getBottom();

             for (int i = 0; i < managed.size(); i++) {

                 Node child = managed.get(i);

                 layoutInArea(child, left, top, width - left - right, height - top - bottom, 0, Insets.EMPTY, true, true, HPos.CENTER, VPos.CENTER);

             }

         }

         private class InitBck2Brwsr implements ChangeListener<Void>, Runnable {

             private final WebEngine eng;

             public InitBck2Brwsr(WebEngine eng) {

                 this.eng = eng;

             }

             @Override

             public synchronized void changed(ObservableValue<? extends Void> ov, Void t, Void t1) {

                 Platform.runLater(this);

                 try {

                     wait();

                 } catch (InterruptedException ex) {

                     LOG.log(Level.SEVERE, null, ex);

                 }

             }

             @Override

             public synchronized void run() {

                 initBck2Brwsr(eng);

                 notifyAll();

             }

         }

     }

 }