Counting lines of parsed HTML documents

Question

Hello,
I am using a HTMLEditorKit.ParserCallback to handle data generated by a ParserDelegator.
Everything is ok but I can not find how to catch end of lines (I need to know at what line a tag or an attribute is found).
Thanks in advance for any hints.

Answer 1

I noticed that the parse() method of ParserDelegator creates a DocumentParser object to do the actual parsing of the HTML document. DocumentParser contains a method getCurrentLine(). So, I tried to extending ParserDelegator so I could access Document Parser. However, the getCurrentLine method is protected so I ended up also extending DocumentParser.
You probably have code something like:
new MyParserDelegator().parse(reader, this, false);
This should be replaced with:
parser = new MyParserDelegator();
parser.parse(reader, this, false);
where you defined an instance variable: MyParserDelegator parser;
You can now use parser.getCurrentLine() in any of you parser callback methods.
Note that you may not alway get the results that you expect for the current line as many times I found the line to be 1 greater than I thought it should be. Anyway you can decide if the code is of any value.
Following is the code for MyParserDelegator and MyDocumentmentParser inner class. Good Luck.
import java.io.IOException;
import java.io.Reader;
import java.io.Serializable;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.parser.DTD;
import javax.swing.text.html.parser.DocumentParser;
import javax.swing.text.html.parser.ParserDelegator;
public class MyParserDelegator extends ParserDelegator implements Serializable
     MyDocumentParser parser;
public void parse(Reader r, HTMLEditorKit.ParserCallback cb, boolean ignoreCharSet) throws IOException
     String name = "html32";
     DTD dtd = createDTD( DTD.getDTD( name ), name );
          parser = new MyDocumentParser(dtd);
          parser.parse(r, cb, ignoreCharSet);
     public int getCurrentLine()
          return parser.getCurrentLine();
public class MyDocumentParser extends DocumentParser
     public MyDocumentParser(DTD dtd)
          super(dtd);
     public int getCurrentLine()
          return super.getCurrentLine();