/**
 * jQuery Plugin tablePager v1.0
 * Creates pagination for large tables.  tablePage hides all rows in the tbody of your
 * table and displays the rows in the current "page" of the table.  tablePager also
 * binds events and data to specified elements in the tfoot area of the table for paging
 * and information display.
 * 
 * USAGE:
 * 
 * jQuery("table").tablePager(options);
 * 
 * Copyright (c) 2008 David E Still [dave at stilldesigning dot com]
 * Available for use under the LGPL license
 * @author David E. Still, http://www.stilldesigning.com
 */
/**
 * Create pagination for large tables
 * 
 * @uses jQuery
 * 
 * @param Object opts JSON object of paging parameters
 * @param Integer opts_pagesize Number of table rows (<tr> tags) per page (default 15)
 * @param Integer opts_startpage First page displayed (default 1)
 * @param Object opts_selectors jQuery selectors to find buttons and data elements
 * @param String opts_selectors_next jQuery selector for "Next" button for paging forward through table.  All matching elements are captured for click events, and the current page is incremented by 1 when fired. (default ".pageNext")
 * @param String opts_selectors_prev jQuery selector for "Previous" button for paging back through table.  All matching elements are captured for click events, and the current page is decremented by 1 when fired. (default ".pagePrev")
 * @param String opts_selectors_page jQuery selector for elements displaying the current page number.  When the current page is updated, all matching elements are updated to display the current page number. (default ".pageNum")
 * @param String opts_selectors_count jQuery selector for elements displaying the total page count.  When tablePager is first called, all matching elements are updated to display the page count. (default ".pageCount")
 * 
 * @return jQuery element Returns the jQuery object representing the element
 */
jQuery.fn.tablePager = function() {
    var opts = jQuery.extend({
        pagesize: 15,
        startpage: 1,
        selectors: {
            next: ".pageNext",
            prev: ".pagePrev",
            page: ".pageNum",
            count: ".pageCount"
        },
        rowstyles: []
    }, arguments[0] || {});
    return this.each(function(){
        jQuery(this)[0].tablePager = {
            table: this,
            opts: opts,
            page: 1,
            showPage: function(page){
                var pagedTable = jQuery(this.table);
                var pagesize = this.opts.pagesize;
                var rows = pagedTable.find("tbody tr");
                page = parseInt(page,10);
                if (page < 1) { page = 1; }
                var count = Math.ceil(rows.length / pagesize);
                if (page > count) { page = count; }
                rows.removeClass(this.opts.rowstyles.join(" "));
                for (var i=0; i<rows.length; i++) {
                    if (i>=(page-1)*pagesize && i<page*pagesize) {
                        jQuery(rows[i]).addClass(this.opts.rowstyles[i % this.opts.rowstyles.length]);
                        jQuery(rows[i]).show();
                    }
                    else { jQuery(rows[i]).hide(); }
                }
                this.page = page;
                jQuery(this.opts.selectors.page).html(page);
                jQuery(this.opts.selectors.count).html(count);
                if( count == 1 ){ jQuery(this.opts.selectors.pager).hide(); }
                else{ jQuery(this.opts.selectors.pager).show(); }
                
                if( page == 1 ) { jQuery(this.opts.selectors.prev).addClass(this.opts.pagerstyles.disabled); }
                else{ jQuery(this.opts.selectors.prev).removeClass(this.opts.pagerstyles.disabled); }

                if( page == count ) { jQuery(this.opts.selectors.next).addClass(this.opts.pagerstyles.disabled); }
                else{ jQuery(this.opts.selectors.next).removeClass(this.opts.pagerstyles.disabled); }
                
                
                return jQuery(this);
            },
            next: function() {
                var pagedTable = (arguments.length < 1)?jQuery(this):arguments[0].data;
                var page = pagedTable[0].tablePager.page;
                pagedTable[0].tablePager.showPage(page+1);
                location.hash='#'+(page+1);
                return false;
            },
            prev: function() {
                var pagedTable = (arguments.length < 1)?jQuery(this):arguments[0].data;
                var page = pagedTable[0].tablePager.page;
                pagedTable[0].tablePager.showPage(page-1);
                location.hash='#'+(page-1);
                return false;
            }
        };
        if (location.hash) {
            opts.startpage = location.hash.replace(/#/,''); 
        }
        
        jQuery(this)[0].tablePager.showPage(opts.startpage);
        jQuery(jQuery(this)[0].tablePager.opts.selectors.next).bind("click", jQuery(this), jQuery(this)[0].tablePager.next);
        jQuery(jQuery(this)[0].tablePager.opts.selectors.prev).bind("click", jQuery(this), jQuery(this)[0].tablePager.prev);
    });
};