/*
 * Pager - jQuery plugin to format serch result pagers
 */

;(function($) {

    function assertHasClass(element, c, errormsg) {
        if(!$(element).hasClass(c)) {throw errormsg;}
    }
    
    $.extend($.fn, {
        showPager: function(callback, size) {
            var PAGER_SIZE = parseInt(size) || 14;
            $(this).each(function() {
                assertHasClass(this, 'pager', "element must be a pager");

                var pages = jQuery('.page:not(.nextPage, .previousPage)', this);
                if(pages.length <= PAGER_SIZE) {
                    pages.show();
                } else {
                    var current = pages.index(pages.filter('.currentPage'));
                    if(current<=PAGER_SIZE-4) {
                        pages.each(function(i) {
                            var page = jQuery(this);
                            if(i === PAGER_SIZE - 2){
                                page.replaceWith('<span>...</span>');
                            }else if(i<PAGER_SIZE - 1) {
                                page.show();
                            } else if(i === pages.length - 1) {
                                page.show();
                            }
                        });
                    } else if(current > pages.length-(PAGER_SIZE-2)) {
                        pages.each(function(i) {
                            var page = jQuery(this);
                            if(i === 0){
                                page.show();
                            }else if(i === 1){
                                page.replaceWith('<span>...</span>');
                            }else if(i > pages.length - (PAGER_SIZE-1)) {
                                page.show();
                            }
                        });
                    } else {
                        pages.each(function(i) {
                            var page = jQuery(this);
                            if(i === 0){
                                page.show();
                            }else if(i === 1){
                                page.replaceWith('<span>...</span>');
                            }else if(i === pages.length -1) {
                                page.show();
                            }else if(i === pages.length - 2){
                                page.replaceWith('<span>...</span>');
                            }else if(i > (current - Math.floor(PAGER_SIZE/2)+2) && (i < (current + Math.floor(PAGER_SIZE/2) - 1))) {
                                page.show();
                            }
                        });
                    }
                }
                
                if(typeof callback == 'function') {
                    jQuery('a.page', this).click(function() {
                        callback(this.href.slice(this.href.lastIndexOf('#')+1, this.href.length));
                    });
                }

                return this;
            });
        }
    });
})(jQuery);



<%@ attribute name="current" required="true" rtexprvalue="true" type="java.lang.Integer" %>
<%@ attribute name="pages" required="true" rtexprvalue="true" type="java.util.Collection" %>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

<span class="pager">
<c:choose>
    <c:when test="${current > 1}"><a class="page previousPage" href="#${current - 1}"><fmt:message key="general.previous"/></a></c:when>
    <c:otherwise><span class="page previousPage"><fmt:message key="general.previous"/></span></c:otherwise>    
</c:choose>
<c:forEach var="page" items="${pages}">
    <c:choose>
        <c:when test="${page == current}">
            <span class="page currentPage" style="display: none">${page}</span>
        </c:when>
        <c:when test="${page == -1}">
            <span class="page break">...</span>
        </c:when>
        <c:otherwise>
            <a class="page" href="#${page}" style="display: none">${page}</a>
        </c:otherwise>
    </c:choose>
</c:forEach>
<c:choose>
    <c:when test="${current < fn:length(pages)}"><a class="page nextPage" href="#${current + 1}"><fmt:message key="general.next"/></a></c:when>
    <c:otherwise><span class="page nextPage"><fmt:message key="general.next"/></span></c:otherwise>    
</c:choose>
</span>