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Question

How to output JTextPane styled contents to HTML, including custom style?

Answer 1

A:

After reading:

I wrote my own HTML exporter:

  package com.HTMLExport;

    import javax.swing.text.AbstractDocument;
    import javax.swing.text.AttributeSet;
    import javax.swing.text.BadLocationException;
    import javax.swing.text.Element;
    import javax.swing.text.ElementIterator;
    import javax.swing.text.StyleConstants;
    import javax.swing.text.StyledDocument;

    public class NHTMLWriter {

     private StyledDocument _sd;
     private ElementIterator _it;

     protected static final char NEWLINE = '\n';

     public NHTMLWriter(StyledDocument doc) {
      _sd = doc;
      _it = new ElementIterator(doc.getDefaultRootElement());
     }

     public String getHTML(){
      return "<html>" + this.getBody() + "</html>";
     }

     protected String getBody() {
      /*
           This will be a section element for a styled document.
           We represent this element in HTML as the body tags.
              Therefore we ignore it.
       */
      _it.current();

      Element next = null;

      String body = "<body>";

      while((next = _it.next()) != null) {
       if (this.isText(next)) {
        body += writeContent(next);
       }
       else if(next.getName().equals("component")){
        body += getText(next);  //this is where the custom component is output. 
       }
      }
      body += "</body>";

      return body;
     }
     /**
      * Returns true if the element is a text element.
      */
     protected boolean isText(Element elem) {
      return (elem.getName() == AbstractDocument.ContentElementName);
     }
     protected String writeContent(Element elem){

      AttributeSet attr = elem.getAttributes();

  String startTags = this.getStartTag(attr);

  String content = startTags + this.getText(elem) + this.getEndTag(startTags);

  return content;
     }
     /**
      * Writes out text
      */
     protected String text(Element elem){
      String contentStr = getText(elem);
      if ((contentStr.length() > 0) && (contentStr.charAt(contentStr.length()-1) == NEWLINE)) {
       contentStr = contentStr.substring(0, contentStr.length()-1) + "<br/>";
      }
      if (contentStr.length() > 0) {
       return contentStr;
      }
      return contentStr;
     }

     protected String getText(Element elem){
      try {
       return _sd.getText(elem.getStartOffset(), elem.getEndOffset() - elem.getStartOffset()).replaceAll(NEWLINE+"", "<br/>");
      } catch (BadLocationException e) {
       e.printStackTrace();
      }
      return "";
     }
     private String getEndTag(String startTags) {

  String[] startOrder = startTags.split("<");

  String tags = "";

  for(String s : startOrder){
   tags = "</" + s + tags;
  }

  return tags;
    }
     private String getStartTag(AttributeSet attr) {

      String tag = "";

      if(StyleConstants.isBold(attr)){
       tag += "<b>";
      }
      if(StyleConstants.isItalic(attr)){
       tag += "<i>";
      }
      if(StyleConstants.isUnderline(attr)){
       tag += "<u>";
      }

      return tag;
     }
    }

Now I need to write code so that it can do the reverse: converts the output HTML to a StyledDocument.

First, coffee.

Michael Robinson 2009-10-12 03:07:27

ansaurus

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How to output JTextPane styled contents to HTML, including custom style?

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