/* Copyright 2004 Elliotte Rusty Harold
   
   This library is free software; you can redistribute it and/or modify
   it under the terms of version 2.1 of the GNU Lesser General Public 
   License as published by the Free Software Foundation.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
   GNU Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library. If not, see
   <https://www.gnu.org/licenses/>.
   
   You can contact Elliotte Rusty Harold by sending e-mail to
   elharo@ibiblio.org. Please include the word "XOM" in the
   subject line. The XOM home page is located at https://xom.nu/
*/
   
package nu.xom.tools;

import java.io.File;
import java.io.FileFilter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import nu.xom.Attribute;
import nu.xom.Builder;
import nu.xom.DocType;
import nu.xom.Document;
import nu.xom.Element;
import nu.xom.NodeFactory;
import nu.xom.Nodes;
import nu.xom.ParsingException;
import nu.xom.Serializer;


/**
 * <p>
 * This class converts standard Sun JavaDoc to well-formed
 * XHTML. It requires the use of John Cowan's TagSoup.
 * </p>
 * 
 * @author Elliotte Rusty Harold
 * @version 1.0
 * 
 */
class XHTMLJavaDoc {
    
    private static Builder builder 
      = new Builder(new org.ccil.cowan.tagsoup.Parser(), 
         false, new HTMLFixFactory());


    private static class HTMLFilter implements FileFilter {

        public boolean accept(File pathname) {
            if (pathname.getName().endsWith(".html")) return true;
            if (pathname.isDirectory()) return true;
            return false;
        }

    }
    
    
    public static void main(String[] args) {
        
        try {
            File indir = new File(args[0]);
            process(indir);
        }
        catch (Exception ex) {
            ex.printStackTrace();
        }
        
    }


    private static void process(File indir) {
        
        FileFilter htmlfilter = new HTMLFilter();
        if (indir.exists() && indir.isDirectory()) {
            File[] files = indir.listFiles(htmlfilter);
            for (int i = 0; i < files.length; i++) {
                File f = files[i];
                if (f.isDirectory()) {
                    process(f);
                }
                else {
                    try {
                        Document doc = builder.build(f);
                        DocType doctype = new DocType("html", 
                          "-//W3C//DTD XHTML 1.0 Frameset//EN",
                          "http://www.w3.org/TR/2000/REC-xhtml1-20000126/DTD/xhtml1-frameset.dtd");
                        doc.setDocType(doctype);
                        Attribute en = new Attribute("lang", "en-US");
                        Attribute xmlen = new Attribute("xml:lang", 
                          "http://www.w3.org/XML/1998/namespace", "en-US");
                        Element root = doc.getRootElement();
                        root.addAttribute(en);
                        root.addAttribute(xmlen);
                        Attribute version = root.getAttribute("version");
                        if (version != null) root.removeAttribute(version);
                        Element body = root.getFirstChildElement("body", "http://www.w3.org/1999/xhtml");
                        Element frameset = root.getFirstChildElement("frameset", "http://www.w3.org/1999/xhtml");
                        if (frameset != null && body != null) {
                            root.removeChild(body);
                        }
                        Serializer serializer = new HTMLSerializer(new FileOutputStream(f));
                        serializer.write(doc);
                        serializer.flush();
                    } 
                    catch (ParsingException ex) {
                        ex.printStackTrace();
                    } 
                    catch (IOException ex) {
                        ex.printStackTrace();
                    }
                }
            }
        }
        else {
            System.err.println("Could not locate source directory: " + indir);
        }
        
    }
    
    
    private static class HTMLFixFactory extends NodeFactory {
        
        public Nodes finishMakingElement(Element element) {
            
            if (element.getLocalName().equals("i")) {
                element.setLocalName("span");
                element.addAttribute(new Attribute("style", "font-style: italic"));
            }
            else if (element.getLocalName().equals("b")) {
                element.setLocalName("span");
                element.addAttribute(new Attribute("style", "font-weight: bold"));
            }
                
            return new Nodes(element);   
            
        }
        
    }
    
    
    private static class HTMLSerializer extends Serializer {
        
        HTMLSerializer(OutputStream out) {
            super(out);
        }
        
        protected void writeXMLDeclaration() {
        }
        
        protected void writeEmptyElementTag(Element element) 
          throws IOException {
             super.writeStartTag(element);
             super.writeEndTag(element);
        }
        
    }
    
    
}
