/**
printDisplayedButton -- in GulchDisplayPane
*/
void jButton18_actionPerformed(ActionEvent e) {
	//get Vector of TreeDataRows which are currently open
    	Vector v = treePane.getOpenRows();
    	//send Vector to server and then call CGI script
    	callCgi(v);
}

/**
* getOpenRows() -- in GulchTreePane
* return a vector of TreeDataRows which are open (visible) in the
* current tree structure
*/
public Vector getOpenRows() {
	TreePath path;
	DefaultMutableTreeNode node;
	Vector v = new Vector();
	// Traverse the JTree looking for open nodes
	int rowCount = tree.getRowCount();
	for (int i = 0; i < rowCount; i++) {
		path = tree.getPathForRow(i);
		node = (DefaultMutableTreeNode)path.getLastPathComponent();
		v.addElement(node.getUserObject());
	}
	return v;
}

/**
callCgi() -- in GulchDisplayPane
*/
void callCgi(Vector v) {
	try {
		//send Vector to server
		tabbedPane.interfaceMgr1.multiNodeDisplay(v, xmlRadioButton.isSelected());
		//return from server -- new xml or html file has been created
		//now call cgi script to display file in browser
		URL cgiScript = new URL("http://webguide.cs.colorado.edu/cgi-bin/xml/xmlWebGuide.cgi?webguide.html");
		if (parentPanel.parent.isApplet()) {
			parentPanel.parent.getTheApp().getAppletContext().showDocument(cgiScript, "target");
		}
	}
	catch (Exception ex) {
		messageTextArea.setText(blankMessage);
		messageTextArea.setText("WARNING: Caught an exception while displaying rows.");
		return;
	}
}

/**
multiNodeDisplay() -- in InterfaceMgrServer
*/
public int multiNodeDisplay(Vector v, boolean xml) {
	int returnInt = 0;
try {
	Connection ColabDatabase = openDatabase();
	Statement stmt = ColabDatabase.createStatement();
	//translate Vector of selected tree nodes into XML or HTML string
	String s = "";
	s = translateXml(v, xml);
	//store file on server
	String fileName = "webguide.xml";
	FileOutputStream fos = new FileOutputStream(fileName);
	PrintWriter pw = new PrintWriter(fos, true);
	pw.print(s);
	pw.close();
	fos.close();
	//output s as a file and call CGI from client
	ColabDatabase.close();
}
catch (Exception e) {
	e.printStackTrace();
}
	return returnInt;
}

/**
translateXml() translate a Vector of TreeDataRows into an XML String
*/
	public String translateXml(Vector v, boolean xml) {
	java.util.Date now = new java.util.Date();
	String returnString = "";
	String xmlString = "";
	StringBuffer s = new StringBuffer("<!-- XML generated by WebGuide -->");
	s.append("<DATASET SYSTEM='WebGuide_2000' DESCRIPTION='tree of data for a perspective' " +
		" CREATOR='" + databaseMgr1.state1.getCurrentAuthorName() + "' " +
		"CREATE_DATE='" + now.toString().substring(0, 11) + "' XML_VERSION='1.0'> ");
	int i = 0;
	while (i < v.size()) {
		i = addNodeXml(v, i, s);
		i++;
	}
	s.append("</DATASET>");
	xmlString = s.toString();

	// Convert the string to HTML if the user so desires
	if (! xml) {
		try {
			XSLTProcessor processor = XSLTProcessorFactory.getProcessor();

			// Have the XSLTProcessor processor object transform "foo.xml" to
			// System.out, using the XSLT instructions found in "foo.xsl".
			processor.process(new XSLTInputSource(xmlString),
			new XSLTInputSource("webguide.xsl"),
			new XSLTResultTarget(returnString));
		} catch (org.xml.sax.SAXException e) {
			System.err.println("Error from XSL processor");
			System.err.println(e);
		}
	}
	return returnString;
}

/**
addNodeXml() append a Node with its recursive sub-nodes
*/
public int addNodeXml(Vector v, int i, StringBuffer s) {
	TreeDataRow row = (TreeDataRow) v.elementAt(i);
	int currentNodeNid = row.getNid();
	int authorNid = 0;
	s.append(" <NOTE NOTE_ID='" + currentNodeNid);
	s.append("' NOTE_KIND='" + row.getKindName());
	s.append("' TITLE='" + markup(row.getName()));
	if (row.getCreated() == null) { s.append(" ' CREATE_DATE=' "); }
	else { s.append(" ' CREATE_DATE='" + row.getCreated()); }
	s.append("' AUTHOR='" + row.getAuthorName());
	s.append("'>");
	//add content and color for this node from database
	try {
		Connection ColabDatabase = openDatabase();
		Statement stmt = ColabDatabase.createStatement();
		String content = databaseMgr1.getMemo(currentNodeNid, stmt);
		s.append(" <CONTENT>'" + markup(content) + "'</CONTENT>");
		authorNid = row.getAuthor();
		String color = databaseMgr1.getColor(authorNid, stmt);
		s.append(" <FIELD> NAME=color VALUE='" + color + "' </FIELD>");
		String perspective = row.getPerspectiveName();
		s.append(" <FIELD> NAME=perspective VALUE='" + perspective + "' </FIELD>");
		ColabDatabase.close();
	}
	catch (Exception e) {
		s.append(" <CONTENT>'" + row.getDescription() + "'</CONTENT>");
		e.printStackTrace();
	}
	while (i+1 < v.size()) { //use explicit while loop because value of i may change
		row = (TreeDataRow) v.elementAt(i+1);
		if (row.getParent() == currentNodeNid) { //if current node is parent of new node
			i = addNodeXml(v, i+1, s); //then recures and append new node within current node
		}
		else {
			s.append("</NOTE>");
			return i;
		}
	}
	s.append("</NOTE>");
	return i;
}

/**
markup()
replace special characters with XML markup for them
& &amp
< &lt
> &gt
" &quot
' &apos
*/
private String markup(String s) {
	StringBuffer t = new StringBuffer();
	for (int i=0; i<s.length(); i++) {
		if (s.charAt(i) == '&') { t.append("&amp;"); }
		else {
			if (s.charAt(i) == '<') { t.append("&lt;"); }
			else {
				if (s.charAt(i) == '>') { t.append("&gt;"); }
				else {
					if (s.charAt(i) == '\"') { t.append("&quot;"); }
					else {
						if (s.charAt(i) == '\'') { t.append("&apos;"); }
						else {
							t.append(s.charAt(i));
						}
					}
				}
			}
		}
	}
	return t.toString();
}