package org.webslinger.ext.wiki;

 import java.io.StringWriter;

 import java.util.LinkedList;

 import java.util.Iterator;

 import java.util.ListIterator;

 import org.webslinger.ext.wiki.parser.*;

 public class HtmlOutput extends AbstractWikiVisitor {

     // FIXME: variable/control nodes

     protected final StringWriter writer;

     protected StringBuilder indent = new StringBuilder();

     public HtmlOutput(StringWriter writer) {

         this.writer = writer;

     }

     protected Object visitChildren(SimpleNode node, Object data) {

         int length = indent.length();

         if (!(node instanceof WikiPage || node instanceof WikiList)) indent.append(' ');

         try {

             return super.visitChildren(node, data);

         } finally {

             indent.setLength(length);

         }

     }

     protected void visitChild(Node parent, Node child, ListIterator<Node> it, Object data) {

         super.visitChild(parent, child, it, data);

         if (parent instanceof WikiTranscludeTarget && it.hasNext()) writer.write(", ");

     }

     public Object visit(WikiTransclude node, Object data) {

         throw new UnsupportedOperationException();

     }

     public Object visit(WikiTranscludeTarget node, Object data) {

         throw new UnsupportedOperationException();

     }

     public Object visit(WikiTranscludeParam node, Object data) {

         throw new UnsupportedOperationException();

     }

     public Object visit(WikiBold node, Object data) {

         writer.write("<b>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</b>");

         }

     }

     public Object visit(WikiBreak node, Object data) {

         writer.write("<br />");

         return data;

     }

     public Object visit(WikiDivClass node, Object data) {

         writer.write("<div class=\"");

         writer.write(node.getClassName());

         writer.write("\">");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</div>");

         }

     }

     public Object visit(WikiDivStyle node, Object data) {

         writer.write("<div style=\"");

         writer.write(node.getStyle());

         writer.write("\">");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</div>");

         }

     }

     public Object visit(WikiHeader node, Object data) {

         writer.write(indent.toString());

         writer.write("<h");

         writer.write(node.getLength());

         writer.write('>');

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</h");

             writer.write(node.getLength());

             writer.write(">\n");

         }

     }

     public Object visit(WikiHR node, Object data) {

         writer.write("<hr />");

         return data;

     }

     public Object visit(WikiItalics node, Object data) {

         writer.write("<i>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</i>");

         }

     }

     public Object visit(WikiLink node, Object data) {

         Node link, title;

         if (node.jjtGetNumChildren() > 1) {

             title = node.jjtGetChild(0);

             link = node.jjtGetChild(1);

         } else {

             link = node.jjtGetChild(0);

             title = link;

         }

         writer.write("<a href=\"");

         link.jjtAccept(this, data);

         writer.write("\">");

         title.jjtAccept(this, data);

         writer.write("</a>");

         return data;

     }

     public Object visit(WikiListItem node, Object data) {

         writer.write(indent.toString());

         writer.write("<li>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</li>\n");

         }

     }

     public Object visit(WikiMono node, Object data) {

         writer.write("<tt>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</tt>");

         }

     }

     public Object visit(WikiOrderedList node, Object data) {

         writer.write(indent.toString());

         writer.write("<ol>\n");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write(indent.toString());

             writer.write("</ol>\n");

         }

     }

     public Object visit(WikiPage node, Object data) {

         writer.write("<style>\n");

         writer.write("p {\n");

         writer.write(" border: 1px solid green;\n");

         writer.write("}\n");

         writer.write("</style>\n");

         return visitChildren(node, data);

     }

     public Object visit(WikiParagraph node, Object data) {

         writer.write("\n");

         writer.write(indent.toString());

         writer.write("<p>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</p>");

         }

     }

     public Object visit(WikiPre node, Object data) {

         writer.write("<pre>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</pre>");

         }

     }

     public Object visit(WikiTable node, Object data) {

         writer.write(indent.toString());

         writer.write("<table border=\"1\">\n");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write(indent.toString());

             writer.write("</table>\n");

         }

     }

     public Object visit(WikiTableCaption node, Object data) {

         writer.write(indent.toString());

         writer.write("<caption>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</caption>\n");

         }

     }

     public Object visit(WikiTableData node, Object data) {

         writer.write(indent.toString());

         writer.write("<td>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</td>\n");

         }

     }

     public Object visit(WikiTableHeader node, Object data) {

         writer.write(indent.toString());

         writer.write("<th>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</th>\n");

         }

     }

     public Object visit(WikiTableRow node, Object data) {

         writer.write(indent.toString());

         writer.write("<tr>\n");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write(indent.toString());

             writer.write("</tr>\n");

         }

     }

     public Object visit(WikiTerm node, Object data) {

         writer.write("<dl>\n");

         writer.write(indent.toString());

         writer.write("<dt>");

         writer.write(node.getTerm());

         writer.append("</dt>\n");

         writer.write(indent.toString());

         writer.write("<dd>");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write("</dd>\n");

             writer.write("</dl>");

         }

     }

     public Object visit(WikiText node, Object data) {

         writer.write(node.getText());

         return data;

     }

     public Object visit(WikiUnorderedList node, Object data) {

         writer.write(indent.toString());

         writer.write("<ul>\n");

         try {

             return visitChildren(node, data);

         } finally {

             writer.write(indent.toString());

             writer.write("</ul>\n");

         }

     }

 }