/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program 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 General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.hq.ui.taglib;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.commons.lang.StringEscapeUtils;

public class ShortenTextTag extends TagSupport {
	private static final long serialVersionUID = 1L;

	private static String LEFT_POSITION = "left";
	private static String MIDDLE_POSITION = "middle";
	private static String RIGHT_POSITION = "right";

	private int maxlength;
	private String value = null;
	private String property = null;
	private String styleClass = "listcellpopup4";
	private String position = RIGHT_POSITION;
	private boolean shorten = false;

	public int doStartTag() throws JspException {
		try {
			String value = getValue();
	
			shorten = value.length() > maxlength;
	
			if (property != null) {
				pageContext.setAttribute(property, value);
			}
		} catch(NullPointerException npe) {
			throw new JspTagException(npe);
		}
		
		return SKIP_BODY;
	}

	public int doEndTag() throws JspException {
		try {
			if (property == null) {
				if (shorten) {
					StringBuffer text = new StringBuffer("<abbr");

					text.append(" class=\"").append(styleClass).append("\"")
							.append(" title=\"").append(StringEscapeUtils.escapeHtml(value)).append("\">");

					if (LEFT_POSITION.equalsIgnoreCase(getPosition())) {
						text.append("...").append(StringEscapeUtils.escapeHtml(
								value.substring(value.length() - maxlength)));
					} else if (MIDDLE_POSITION.equalsIgnoreCase(getPosition())) {
						text.append(StringEscapeUtils.escapeHtml(value.substring(0, maxlength / 2))).append(
								"...").append(
								    StringEscapeUtils.escapeHtml(value.substring(value.length()
										- ((maxlength + 1) / 2))));
					} else {
						text.append(StringEscapeUtils.escapeHtml(value.substring(0, maxlength)))
								.append("...");
					}

					text.append("</abbr>");

					pageContext.getOut().println(text.toString());
				} else {
					pageContext.getOut().println(StringEscapeUtils.escapeHtml(value));
				}
			}
		} catch (java.io.IOException e) {
			throw new JspException(e);
		}

		return super.doEndTag();
	}

	public String getValue() {
		return this.value;
	}

	public void setValue(String value) {
		this.value = value;
	}

	public String getProperty() {
		return this.property;
	}

	public void setProperty(String property) {
		this.property = property;
	}

	public int getMaxlength() {
		return this.maxlength;
	}

	public void setMaxlength(int preChars) {
		this.maxlength = preChars;
	}

	public String getStyleClass() {
		return styleClass;
	}

	public void setStyleClass(String styleClass) {
		this.styleClass = styleClass;
	}

	public String getPosition() {
		return this.position;
	}

	public void setPosition(String position) {
		this.position = position;
	}
}