Getting raw text from JTextPane

Question

In my application, I use a JTextPane to display some log information. As I want to hightlight some specific lines in this text (for example the error messages),

Answer 1

No need to use the ParserCallback. Just use:

textPane.getDocument().getText(0, textPane.getDocument().getLength()) );

Answer 2

Based on the accepted answer to: Removing HTML from a Java String

MyHtml2Text parser = new MyHtml2Text();
try {
    parser.parse(new StringReader(myTextPane.getText()));
} catch (IOException ee) {
  //handle exception
}
System.out.println(parser.getText());

Slightly modified version of the Html2Text class found on the answer I linked to

import java.io.IOException;
import javax.swing.text.html.*;
import javax.swing.text.html.parser.*;

public class MyHtml2Text extends HTMLEditorKit.ParserCallback {
    StringBuffer s;
    public MyHtml2Text() {}
    public void parse(Reader in) throws IOException {
        s = new StringBuffer();
        ParserDelegator delegator = new ParserDelegator();
        delegator.parse(in, this, Boolean.TRUE);
    }
    public void handleText(char[] text, int pos) {
        s.append(text);
        s.append("\n");
    }
    public String getText() {
        return s.toString();
    }
}

If you need a more fine-grained handling consider implementing more of the interface defined by HTMLEditorKit.ParserCallback

Answer 3

You need to do it yourself unfortunately. Imagine if some of the contents was HTML specific, eg images - the text representation is unclear. Include alt text or not for instance.

Answer 4

(Is RegExp allowed? This isn't parsing, isn't it)

Take the getText() result and use String.replaceAll() to filter all tags. Than a trim() to remove leading and trailing whitespaces. For the whitespaces between your first and you last 'blabla' I don't see a general solution. Maybe you can spilt the rest around CRLF and trim all Strings again.

(I'm no regexp expert - maybe someone can provide the regexp and earn some reputation ;) )

Edit

.. I just assumed that you don't use < and > in your text - otherwise it.. say, it's a challenge.