src/demo/share/jfc/SwingSet2/HtmlDemo.java

/*
 *
 * Copyright (c) 2007, 2021, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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import javax.swing.JEditorPane;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
import javax.swing.event.HyperlinkEvent.EventType;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLFrameHyperlinkEvent;

import java.awt.BorderLayout;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Html Demo
 *
 * @author Jeff Dinkins
 */
public class HtmlDemo extends DemoModule {

    JEditorPane html;

    /**
     * main method allows us to run as a standalone demo.
     */
    public static void main(String[] args) {
        HtmlDemo demo = new HtmlDemo(null);
        demo.mainImpl();
    }

    /**
     * HtmlDemo Constructor
     */
    public HtmlDemo(SwingSet2 swingset) {
        // Set the title for this demo, and an icon used to represent this
        // demo inside the SwingSet2 app.
        super(swingset, "HtmlDemo", "toolbar/JEditorPane.gif");

        try {
            URL url = null;
            // System.getProperty("user.dir") +
            // System.getProperty("file.separator");
            String path = null;
            try {
                path = "/resources/index.html";
                url = getClass().getResource(path);
            } catch (Exception e) {
                System.err.println("Failed to open " + path);
                url = null;
            }

            if(url != null) {
                html = new JEditorPane(url);
                html.setEditable(false);
                html.addHyperlinkListener(createHyperLinkListener());

                JScrollPane scroller = new JScrollPane();
                JViewport vp = scroller.getViewport();
                vp.add(html);
                getDemoPanel().add(scroller, BorderLayout.CENTER);
            }
        } catch (MalformedURLException e) {
            System.out.println("Malformed URL: " + e);
        } catch (IOException e) {
            System.out.println("IOException: " + e);
        }
    }

    public HyperlinkListener createHyperLinkListener() {
        return new HyperlinkListener() {
            public void hyperlinkUpdate(HyperlinkEvent e) {
                if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
                    if (e instanceof HTMLFrameHyperlinkEvent) {
                        ((HTMLDocument)html.getDocument()).processHTMLFrameHyperlinkEvent(
                            (HTMLFrameHyperlinkEvent)e);
                    } else {
                        try {
                            html.setPage(e.getURL());
                        } catch (IOException ioe) {
                            System.out.println("IOE: " + ioe);
                        }
                    }
                }
            }
        };
    }

    void updateDragEnabled(boolean dragEnabled) {
        html.setDragEnabled(dragEnabled);
    }

}