/**
* jQuery paginate plugin.
* This is a paginate plugin for jquery
*
* Author: Mathieu Vilaplana <mvilaplana@df-e.com>
* Date: March 2008
* rev: 1.0
*
*/
(function ($) {
    $.concat = function () {
        var objTarget = null;
        if (arguments.length == 0) { return objTarget; }
        //get the first argument not null
        var iStart = -1;
        for (i = 0; i < arguments.length; i++) {
            if (arguments[i]) {
                objTarget = arguments[i];
                iStart = i;
                break;
            }
        }
        if (iStart == -1) { return objTarget; }
        for (i = (iStart + 1); i < arguments.length; i++) {
            objTemp = arguments[i];
            if (objTemp != null && objTemp.length && objTemp.size() > 0) {
                size = objTemp.size();
                for (j = 0; j < size; j++) {
                    objTarget[objTarget.length] = objTemp.get(j);
                    objTarget.length += 1;
                }
            }
        }
        return objTarget;
    }
    $.fn.paginate = function (userOptions) {
        __showPage = function (pageNumber, $params) {
            //$("#anim").animate({width: 987}, 'slow');
            //hidde all the elements
            $params.childs.hide();
            $params.options.currentPage = pageNumber;
            $boxes = $params.boxes;
            $boxes.each(function () {
                var $linkChilds = $(this).children('a');
                $linkChilds.removeClass($params.options.classSelected);
                $linkChilds.eq(pageNumber + 1).addClass($params.options.classSelected);
                //Activate desactivate first, previous, next, last links
                if (pageNumber != 1) { $linkChilds.eq(0).removeClass('unactive'); $linkChilds.eq(1).removeClass('unactive'); }
                else { $linkChilds.eq(0).addClass('unactive'); $linkChilds.eq(1).addClass('unactive'); }
                if (pageNumber != $params.options.nbPages) {
                    $linkChilds.eq(($params.options.nbPages + 3)).removeClass('unactive');
                    $linkChilds.eq(($params.options.nbPages + 2)).removeClass('unactive');
                }
                else {
                    $linkChilds.eq(($params.options.nbPages + 2)).addClass('unactive');
                    $linkChilds.eq(($params.options.nbPages + 3)).addClass('unactive');
                }
                //hide the link if to much
                if ($params.options.nbPagesMax != false && $params.options.nbPagesMax < $params.options.nbPages) {
                    unit = $params.options.nbPagesMax / 2;
                    var $nbPageAfter = Math.ceil($params.options.nbPagesMax / 2);
                    var $nbPageBefore = $nbPageAfter;
                    $nbPageAfter--;
                    if ($nbPageBefore != $params.options.nbPagesMax / 2) {
                        $nbPageBefore--;
                        $nbPageBefore = ($nbPageBefore < 0) ? 0 : $nbPageBefore;
                    }
                    var $pageStart = pageNumber - $nbPageBefore;
                    var $pageEnd = pageNumber + $nbPageAfter;
                    if ($pageStart < 1) {
                        $pageEnd += -$pageStart + 1;
                        $pageStart = 1;
                        if ($pageEnd > $params.options.nbPages) { $pageEnd = $params.options.nbPages; }
                    } else {
                        if ($pageEnd > $params.options.nbPages) {
                            $pageStart += $params.options.nbPages - $pageEnd;
                            $pageEnd = $params.options.nbPages;
                            if ($pageStart < 1) { $pageStart = 1; }
                        }
                    }
                    $linkChilds.hide();
                    var $indexStart = $pageStart + 1;
                    var $indexEnd = $pageEnd + 2;
                    for (i = $indexStart; i < $indexEnd; i++) {
                        $linkChilds.eq(i).show();
                    }
                    $linkChilds.eq(0).show();
                    $linkChilds.eq(1).show();
                    $linkChilds.eq($params.options.nbPages + 2).show();
                    $linkChilds.eq($params.options.nbPages + 3).show();
                } else {//show all links
                    $linkChilds.show();
                }
            });
            $iStart = (pageNumber - 1) * $params.options.nbElemsPerPage;
            $iEnd = $iStart + $params.options.nbElemsPerPage;
            //$("#anim").animate({width: 0}, 'slow');
            for ($i = $iStart; $i < $iEnd; $i++) {
                $params.childs.eq($i).show();
            }
        }
        var $options = $.extend({ currentPage: 1 }, $.fn.paginate.defaultOptions, userOptions || {});
        //if paginate box is defined by default do not show the paginate after
        if ($options.paginateBox) {
            if (!userOptions.bShowAfter)
                $options.bShowAfter = false;
        }
        return this.each(function () {
            var $this = $(this);
            if ($this.is('table') && (!userOptions || !userOptions.items)) {
                $options = $.extend($options, { items: 'tr' });
            }
            if ($this.is('ul') && (!userOptions || !userOptions.items)) {
                $options = $.extend($options, { items: 'li' });
            }
            var $childs = $this.is('table') ? $this.find($options.items) : $this.children($options.items);
            //if paginate not necessary
            if ($childs.size() <= $options.nbElemsPerPage) {
                if ($options.paginateBox.size() > 0)
                    $options.paginateBox.hide();
                return;
            }
            var $boxPaginateModel = $('<div></div>').addClass($options.classPaginate);
            var $boxPaginateTop = null;
            var $boxPaginateBottom = null;
            if ($options.bShowBefore) { $boxPaginateTop = $boxPaginateModel.clone(true).insertBefore($this); }
            if ($options.bShowAfter) { $boxPaginateBottom = $boxPaginateModel.clone(true).insertAfter($this); }
            //number of pages
            var $nbPages = Math.ceil($childs.size() / $options.nbElemsPerPage);
            $.extend($options, { nbPages: $nbPages });
            var $boxes = $.concat($boxPaginateTop, $boxPaginateBottom, $options.paginateBox);
            var params = { options: $options, childs: $childs, boxes: $boxes }
            //Add links to pages
            /*
            for ($i = 1; $i <= $nbPages; $i++) {
                var myLink = $('<a></a>').addClass($options.classNumber).attr('href', '#').html(' ' + $i + ' ').bind('click', $i, function ($e) {
                    __showPage($e.data, params);
                    return false;
                }).appendTo($boxes);
            }
            */
            //Add links to pages bis
            for ($i = 1; $i <= $nbPages; $i++) {
                var myLink = $('<a></a>').addClass($options.classNumber).attr('href', '#').html('').bind('click', $i, function ($e) {
                    __showPage($e.data, params);
                    return false;
                }).appendTo($boxes);
            }

            //add prev and next link
            var $linkPrev = $('<a></a>').addClass($options.classPrev).attr('href', '#').html($options.strPrev).bind('click', params, function ($e) {
                if ($options.currentPage > 1) { __showPage(($options.currentPage - 1), $e.data); }
                return false;
            }).prependTo($boxes);
            var $linkNext = $('<a></a>').addClass($options.classNext).attr('href', '#').html($options.strNext).bind('click', params, function ($e) {
                if ($options.currentPage < $options.nbPages) { __showPage($options.currentPage + 1, $e.data); }
                return false;
            }).appendTo($boxes);
            //First and last link
            var $linkFirst = $('<a></a>').addClass($options.classFirst).attr('href', '#').html($options.strFirst).bind('click', params, function ($e) {
                __showPage(1, $e.data);
                return false;
            }).prependTo($boxes);
            var $linkLast = $('<a></a>').addClass($options.classLast).attr('href', '#').html($options.strLast).bind('click', params, function ($e) {
                __showPage($options.nbPages, $e.data);
                return false;
            }).appendTo($boxes);
            //
            $showPage = Math.ceil($options.startIndex / $options.nbElemsPerPage);
            __showPage($showPage, params);
        }); //return each
    }
    $.fn.paginate.defaultOptions = {
        items: 'div',
        nbElemsPerPage: 4,
        nbPagesMax: false,
        classSelected: 'selected',
        classPaginate: 'paginate',
        bShowBefore: false,
        bShowAfter: true,
        paginateBox: null,
        startIndex: 1,
        classNumber: 'Number',
        classNext: 'Next',
        classPrev: 'Prev',
        classFirst: 'First',
        classLast: 'Last',
        strNext: ' > ',
        strPrev: ' < ',
        strFirst: '<< ',
        strLast: ' >>'
    }
})(jQuery);