/**

  * 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;

 import java.io.IOException;

 import java.lang.reflect.Method;

 import java.net.URI;

 import java.net.URL;

 import java.net.URLClassLoader;

 import java.util.List;

 import java.util.concurrent.Executors;

 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.VPos;

 import javafx.scene.Node;

 import javafx.scene.Scene;

 import javafx.scene.control.Button;

 import javafx.scene.control.TextField;

 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.web.WebEngine;

 import javafx.scene.web.WebView;

 import javafx.stage.Stage;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 final class WebViewLauncher extends Bck2BrwsrLauncher {

     static {

         try {

             Method m = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);

             m.setAccessible(true);

             URL l = new URL("file://" + System.getProperty("java.home") + "/lib/jfxrt.jar");

             System.err.println("url : " + l);

             m.invoke(ClassLoader.getSystemClassLoader(), l);

         } catch (Exception ex) {

             throw new LinkageError("Can't add jfxrt.jar on the classpath", ex);

         }

     }

     public WebViewLauncher() {

         super(null);

     }

     @Override

     protected Object[] showBrwsr(final URI url) throws IOException {

         try {

             Executors.newSingleThreadExecutor().submit(new Runnable() {

                 @Override

                 public void run() {

                     WebViewBrowser.launch(WebViewBrowser.class, url.toString());

                 }

             });

         } catch (Throwable ex) {

             ex.printStackTrace();

         }

         return null;

     }

     @Override

     public void close() throws IOException {

         Platform.exit();

     }

     /**

      * Demonstrates a WebView object accessing a web page.

      *

      * @see javafx.scene.web.WebView

      * @see javafx.scene.web.WebEngine

      */

     public static class WebViewBrowser extends Application {

         @Override

         public void start(Stage primaryStage) throws Exception {

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

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

             primaryStage.show();

         }

         /**

          * Create a resizable WebView pane

          */

         public class WebViewPane extends Pane {

             public WebViewPane(List<String> 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();

                 final TextField locationField = new TextField();

                 System.err.println("params : " + params);

                 if (params.size() > 0) {

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

                     locationField.setText(params.get(0));

                 }

                 locationField.setMaxHeight(Double.MAX_VALUE);

                 Button goButton = new Button("Go");

                 goButton.setDefaultButton(true);

                 EventHandler<ActionEvent> goAction = new EventHandler<ActionEvent>() {

                     @Override

                     public void handle(ActionEvent event) {

                         eng.load(locationField.getText().startsWith("http://") ? locationField.getText()

                             : "http://" + locationField.getText());

                     }

                 };

                 goButton.setOnAction(goAction);

                 locationField.setOnAction(goAction);

                 eng.locationProperty().addListener(new ChangeListener<String>() {

                     @Override

                     public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {

                         locationField.setText(newValue);

                     }

                 });

                 GridPane grid = new GridPane();

                 grid.setVgap(5);

                 grid.setHgap(5);

                 GridPane.setConstraints(locationField, 0, 0, 1, 1, HPos.CENTER, VPos.CENTER, Priority.ALWAYS, Priority.SOMETIMES);

                 GridPane.setConstraints(goButton, 1, 0);

                 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(locationField, goButton, view);

                 getChildren().add(grid);

             }

             @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);

                 }

             }

         }

     }

 }