RuntimeException trying t

From:

"Phil Powell" <phil.powell@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:31:45 GMT

Message-ID:

<1173815947.903069.326550@e65g2000hsc.googlegroups.com>

To: comp.lang.java.gui
According to http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4695909
the problem with the inconsistent ArrayIndexOutOfBoundsException that
I have been getting whenever I would go to a particular URL to put
into JEditorPane using setPage() - this may also be due to JEditorPane
containing HTML which contains a <META> tag and/or <!-- comment tag --

. I created a class SimpleHTMLRenderableEditorPane which extends

JEditorPane, based upon code I found in the aformentioned bug link
which should auto-strip out "bad tags":

[code]
/*
* SimpleHTMLRenderableEditorPane.java
*
* Created on March 13, 2007, 3:39 PM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/

package com.ppowell.tools.ObjectTools.SwingTools;

import javax.swing.JEditorPane;

/**
* A safer version of {@link javax.swing.JEditorPane}
* @author Phil Powell
* @version JDK 1.6.0
*/
public class SimpleHTMLRenderableEditorPane extends JEditorPane {

    //--------------------------- --* CONSTRUCTORS *--
---------------------------
    // <editor-fold defaultstate="collapsed" desc=" Constructors
">
    /** Creates a new instance of SimpleHTMLRenderableEditorPane */
    public SimpleHTMLRenderableEditorPane() {
        super();
    }
    // </editor-fold>
    //----------------------- --* GETTER/SETTER METHODS *--
----------------------
    // <editor-fold defaultstate="collapsed" desc=" Getter/Setter
Methods ">
    /**
     * Overloaded to fix HTML rendering bug Bug ID: 4695909.
     * @param text
     */
    public void setText(String text) {
        // Workaround for bug Bug ID: 4695909 in java 1.4
        // JEditorPane does not handle the META tag in the html HEAD
        if (isJava14() && "text/
html".equalsIgnoreCase(getContentType())) {
            text = stripMetaTag(text);
        }
        super.setText(text);
    }
    // </editor-fold>
    //--------------------------- --* OTHER METHODS *--
--------------------------
    // <editor-fold defaultstate="collapsed" desc=" Methods ">
    /**
     * Clean HTML to remove things like <script>, <style>, <object>,
<embed>, and 
     * Based upon <a href="http://bugs.sun.com/bugdatabase/view_bug.do?
bug_id=4695909">bug report</a>
     */
    public void cleanHTML() {
        try {
            String html = getText();
            if (html != null && !html.equals("")) {
                String[] patternArray = {
                    "<script[^>]*>[^<]*(</script>)?",
                    "<style[^>]*>[^<]*(</style>)?>",
                    "<object[^>]*>[^<]*(</object>)?>",
                    "<embed[^>]*>[^<]*(</embed>)?>",
                    "<!\\-\\-.*\\-\\->"
                };
                for (int i = 0; i < patternArray.length; i++) {
                    html = html.replaceAll(patternArray[i], "");
                }
                setText(html);
            }
        } catch (Exception e) {} // DO NOTHING
    }

    /**
     * Determine if java version is 1.4.
     * @return true if java version is 1.4.x....
     */
    private boolean isJava14() {
        String version = System.getProperty("java.version");
        return version.startsWith("1.4");
    }

    /**
     * Workaround for Bug ID: 4695909 in java 1.4, fixed in 1.5
     * JEditorPane fails to display HTML BODY when META
     * tag included in HEAD section.
     *
     * <html>
     * <head>
     * <META http-equiv="Content-Type" content="text/html;
charset=UTF-8">
     * </head>
     * <body>
     *
     * @param text html to strip.
     * @return same HTML text w/o the META tag.
     */
    private String stripMetaTag(String text) {
        // String used for searching, comparison and indexing
        String textUpperCase = text.toUpperCase();

        int indexHead = textUpperCase.indexOf("<META ");
        int indexMeta = textUpperCase.indexOf("<META ");
        int indexBody = textUpperCase.indexOf("<BODY ");

        // Not found or meta not inside the head nothing to strip...
        if (indexMeta == -1 || indexMeta > indexHead && indexMeta <
indexBody) {
            return text;
        }

        // Find end of meta tag text.
        int indexHeadEnd = textUpperCase.indexOf(">", indexMeta);

        // Strip meta tag text
        return text.substring(0, indexMeta-1) +
text.substring(indexHeadEnd+1);
    }
    // </editor-fold>
}

However, upon running the following line:

[code]
SimpleBrowser.this.browser.cleanHTML();
[/code]

I spawn the following exception:

[code]
Exception in thread "Thread-2" java.lang.RuntimeException: Must insert
new content into body element-
        at javax.swing.text.html.HTMLDocument
$HTMLReader.generateEndsSpecsForMidInsert(HTMLDocument.java:1961)
        at javax.swing.text.html.HTMLDocument
$HTMLReader.<init>(HTMLDocument.java:1908)
        at javax.swing.text.html.HTMLDocument
$HTMLReader.<init>(HTMLDocument.java:1782)
        at javax.swing.text.html.HTMLDocument
$HTMLReader.<init>(HTMLDocument.java:1777)
        at
javax.swing.text.html.HTMLDocument.getReader(HTMLDocument.java:137)
        at javax.swing.text.html.HTMLEditorKit.read(HTMLEditorKit.java:
228)
        at javax.swing.JEditorPane.read(JEditorPane.java:556)
        at javax.swing.JEditorPane$PageLoader.run(JEditorPane.java:
647)

[/code]

What should I do at this point?

Thanks
Phil

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