/********************************************************************************
 * CruiseControl, a Continuous Integration Toolkit
 * Copyright (c) 2003, ThoughtWorks, Inc.
 * 200 E. Randolph, 25th Floor
 * Chicago, IL 60601 USA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
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 *     + Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     + Redistributions in binary form must reproduce the above
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 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
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 *       names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior
 *       written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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package net.sourceforge.cruisecontrol.taglib;

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

/**
 *
 * @author <a href="mailto:robertdw@users.sourceforge.net">Robert Watkins</a>
 */
public class TabTag extends CruiseControlTagSupport {
    private String name;
    private String url;
    private String label;
    private Tab tab;

    public int doStartTag() throws JspException {
        Tag parentTag = getParent();
        if (!(parentTag instanceof TabSheetTag)) {
            throw new JspTagException("TabTag needs to be directly enclosed in a TabSheetTag");
        }
        TabSheetTag tabSheet = (TabSheetTag) parentTag;
        final boolean selected = isSelected(tabSheet);
        tab = new Tab(name, url, label, selected);
        tabSheet.addTab(tab);
        return selected ? Tag.EVAL_BODY_INCLUDE : Tag.SKIP_BODY;
    }

    public int doEndTag() throws JspException {
        tab.setUrl(url);
        return EVAL_PAGE;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public void setLabel(String label) {
        this.label = label;
    }

    private boolean isSelected(TabSheetTag tabSheet) {
        final String expectedTab = getPageContext().getRequest().getParameter("tab");
        if (expectedTab == null && !tabSheet.hasTabs()) {
            return true;
        }
        return name.equals(expectedTab);
    }
}