jquery.tablesorter.js

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/*
 * 
 * TableSorter 2.0 - Client-side table sorting with ease!
 * Version 2.0.1
 * @requires jQuery v1.2.1
 * 
 * Copyright (c) 2007 Christian Bach
 * Examples and docs at: http://tablesorter.com
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 
 */
/**
 *
 * @description Create a sortable table with multi-column sorting capabilitys
 * 
 * @example $('table').tablesorter();
 * @desc Create a simple tablesorter interface.
 *
 * @example $('table').tablesorter({ sortList:[[0,0],[1,0]] });
 * @desc Create a tablesorter interface and sort on the first and secound column in ascending order.
 * 
 * @example $('table').tablesorter({ headers: { 0: { sorter: false}, 1: {sorter: false} } });
 * @desc Create a tablesorter interface and disableing the first and secound column headers.
 * 
 * @example $('table').tablesorter({ 0: {sorter:"integer"}, 1: {sorter:"currency"} });
 * @desc Create a tablesorter interface and set a column parser for the first and secound column.
 * 
 * 
 * @param Object settings An object literal containing key/value pairs to provide optional settings.
 * 
 * @option String cssHeader (optional) 			A string of the class name to be appended to sortable tr elements in the thead of the table. 
 * 												Default value: "header"
 * 
 * @option String cssAsc (optional) 			A string of the class name to be appended to sortable tr elements in the thead on a ascending sort. 
 * 												Default value: "headerSortUp"
 * 
 * @option String cssDesc (optional) 			A string of the class name to be appended to sortable tr elements in the thead on a descending sort. 
 * 												Default value: "headerSortDown"
 * 
 * @option String sortInitialOrder (optional) 	A string of the inital sorting order can be asc or desc. 
 * 												Default value: "asc"
 * 
 * @option String sortMultisortKey (optional) 	A string of the multi-column sort key. 
 * 												Default value: "shiftKey"
 * 
 * @option String textExtraction (optional) 	A string of the text-extraction method to use. 
 * 												For complex html structures inside td cell set this option to "complex", 
 * 												on large tables the complex option can be slow. 
 * 												Default value: "simple"
 * 
 * @option Object headers (optional) 			An array containing the forces sorting rules. 
 * 												This option let's you specify a default sorting rule. 
 * 												Default value: null
 * 
 * @option Array sortList (optional) 			An array containing the forces sorting rules. 
 * 												This option let's you specify a default sorting rule. 
 * 												Default value: null
 * 
 * @option Array sortForce (optional) 			An array containing the forces sorting rules. 
 * 												This option let's you specify a default sorting rule. 
 * 												Default value: null
 *  
 * 
 * @option Boolean widthFixed (optional) 		Boolean flag indicating if tablesorter should apply fixed widths to the table columns.
 * 												This is usefull when using the pager companion plugin.
 * 												This options requires the dimension jquery plugin.
 * 												Default value: false
 *
 * @option Boolean cancelSelection (optional) 	Boolean flag indicating if tablesorter should cancel selection of the table headers text.
 * 												Default value: true
 *
 * @option Boolean debug (optional) 			Boolean flag indicating if tablesorter should display debuging information usefull for development.
 *
 * @type jQuery
 *
 * @name tablesorter
 * 
 * @cat Plugins/Tablesorter
 * 
 * @author Christian Bach/[e-mail]
 */

(function($) {
	$.extend({
		tablesorter: new function() {
			
			var parsers = [], widgets = [];
			
			this.defaults = {
				cssHeader: "header",
				cssAsc: "headerSortUp",
				cssDesc: "headerSortDown",
				sortInitialOrder: "asc",
				sortMultiSortKey: "shiftKey",
				sortForce: null,
				textExtraction: "simple",
				parsers: {}, 
				widgets: [],		
				widgetZebra: {css: ["even","odd"]},
				headers: {},
				widthFixed: false,
				cancelSelection: true,
				sortList: [],
				headerList: [],
				dateFormat: "us",
				debug: false
			};
			
			/* debuging utils */
			function benchmark(s,d) {
				log(s + "," + (new Date().getTime() - d.getTime()) + "ms");
			}
			
			this.benchmark = benchmark;
			
			function log(s) {
				if (typeof console != "undefined" && typeof console.debug != "undefined") {
					console.log(s);
				} else {
					alert(s);
				}
			}
						
			/* parsers utils */
			function buildParserCache(table,$headers) {
				
				if(table.config.debug) { var parsersDebug = ""; }
				
				var rows = table.tBodies[0].rows;
				
				if(table.tBodies[0].rows[0]) {

					var list = [], cells = rows[0].cells, l = cells.length;
					
					for (var i=0;i < l; i++) {
						var p = false;
						
						if($.meta && ($($headers[i]).data() && $($headers[i]).data().sorter)  ) {
						
							p = getParserById($($headers[i]).data().sorter);	
						
						} else if((table.config.headers[i] && table.config.headers[i].sorter)) {
	
							p = getParserById(table.config.headers[i].sorter);
						}
						if(!p) {
							p = detectParserForColumn(table.config,cells[i]);
						}
	
						if(table.config.debug) { parsersDebug += "column:" + i + " parser:" +p.id + "\n"; }
	
						list.push(p);
					}
				}
				
				if(table.config.debug) { log(parsersDebug); }

				return list;
			};
			
			function detectParserForColumn(config,node) {
				var l = parsers.length;
				for(var i=1; i < l; i++) {
					if(parsers[i].is($.trim(getElementText(config,node)))) {
						return parsers[i];
					}
				}
				
				// 0 is always the generic parser (text)
				return parsers[0];
			}
			
			function getParserById(name) {
				var l = parsers.length;
				for(var i=0; i < l; i++) {
					if(parsers[i].id.toLowerCase() == name.toLowerCase()) {	
						return parsers[i];
					}
				}
				return false;
			}
			
			/* utils */
			function buildCache(table) {
				
				if(table.config.debug) { var cacheTime = new Date(); }
				
				
				var totalRows = (table.tBodies[0] && table.tBodies[0].rows.length) || 0,
					totalCells = (table.tBodies[0].rows[0] && table.tBodies[0].rows[0].cells.length) || 0,
					parsers = table.config.parsers, 
					cache = {row: [], normalized: []};
				
					for (var i=0;i < totalRows; ++i) {
					
						/** Add the table data to main data array */
						var c = table.tBodies[0].rows[i], cols = [];
					
						cache.row.push($(c));
						
						for(var j=0; j < totalCells; ++j) {
							cols.push(parsers[j].format(getElementText(table.config,c.cells[j]),table,c.cells[j]));	
						}
												
						cols.push(i); // add position for rowCache
						cache.normalized.push(cols);
						cols = null;
					};
				
				if(table.config.debug) { benchmark("Building cache for " + totalRows + " rows:", cacheTime); }
				
				return cache;
			};
			
			function getElementText(config,node) {
				
				if(!node) return "";
								
				var t = "";
				
				if(config.textExtraction == "simple") {
					if(node.childNodes[0] && node.childNodes[0].hasChildNodes()) {
						t = node.childNodes[0].innerHTML;
					} else {
						t = node.innerHTML;
					}
				} else {
					if(typeof(config.textExtraction) == "function") {
						t = config.textExtraction(node);
					} else { 
						t = $(node).text();
					}	
				}
				return t;
			}
			
			function appendToTable(table,cache) {
				
				if(table.config.debug) {var appendTime = new Date()}
				
				var c = cache, 
					r = c.row, 
					n= c.normalized, 
					totalRows = n.length, 
					checkCell = (n[0].length-1), 
					tableBody = $(table.tBodies[0]),
					rows = [];
				
				// clear the table body
				//$.tablesorter.clearTableBody(table);
				
				
	 			
								
				for (var i=0;i < totalRows; i++) {
					rows.push(r[n[i][checkCell]]);	
					if(!table.config.appender) {
						
						var o = r[n[i][checkCell]];
						var l = o.length;
						for(var j=0; j < l; j++) {
							
							tableBody[0].appendChild(o[j]);
						
						}
						
						//tableBody.append(r[n[i][checkCell]]);
					}
				}	
				
				if(table.config.appender) {
				
					table.config.appender(table,rows);	
				}
				
				rows = null;
				
				if(table.config.debug) { benchmark("Rebuilt table:", appendTime); }
								
				//apply table widgets
				applyWidget(table);
			};
			
			function buildHeaders(table) {
				
				if(table.config.debug) { var time = new Date(); }
				
				var meta = ($.meta) ? true : false, tableHeadersRows = [];
			
				for(var i = 0; i < table.tHead.rows.length; i++) { tableHeadersRows[i]=0; };
				
				$tableHeaders = $("thead th",table);
		
				$tableHeaders.each(function(index) {
							
					this.count = 0;
					this.column = index;
					this.order = formatSortingOrder(table.config.sortInitialOrder);
					
					if(checkHeaderMetadata(this) || checkHeaderOptions(table,index)) this.sortDisabled = true;
					
					if(!this.sortDisabled) {
						$(this).addClass(table.config.cssHeader);
					}
					
					// add cell to headerList
					table.config.headerList[index]= this;
				});
				
				if(table.config.debug) { benchmark("Built headers:", time); log($tableHeaders); }
				
				return $tableHeaders;
				
			};
						
		   	function checkCellColSpan(table, rows, row) {
                var arr = [], r = table.tHead.rows, c = r[row].cells;
				
				for(var i=0; i < c.length; i++) {
					var cell = c[i];
					
					if ( cell.colSpan > 1) { 
						arr = arr.concat(checkCellColSpan(table, headerArr,row++));
					} else  {
						if(table.tHead.length == 1 || (cell.rowSpan > 1 || !r[row+1])) {
							arr.push(cell);
						}
						//headerArr[row] = (i+row);
					}
				}
				return arr;
			};
			
			function checkHeaderMetadata(cell) {
				if(($.meta) && ($(cell).data().sorter === false)) { return true; };
				return false;
			}
			
			function checkHeaderOptions(table,i) {	
				if((table.config.headers[i]) && (table.config.headers[i].sorter === false)) { return true; };
				return false;
			}
			
			function applyWidget(table) {
				var c = table.config.widgets;
				var l = c.length;
				for(var i=0; i < l; i++) {
					
					getWidgetById(c[i]).format(table);
				}
				
			}
			
			function getWidgetById(name) {
				var l = widgets.length;
				for(var i=0; i < l; i++) {
					if(widgets[i].id.toLowerCase() == name.toLowerCase() ) {
						return widgets[i]; 
					}
				}
			};
			
			function formatSortingOrder(v) {
				
				if(typeof(v) != "Number") {
					i = (v.toLowerCase() == "desc") ? 1 : 0;
				} else {
					i = (v == (0 || 1)) ? v : 0;
				}
				return i;
			}
			
			function isValueInArray(v, a) {
				var l = a.length;
				for(var i=0; i < l; i++) {
					if(a[i][0] == v) {
						return true;	
					}
				}
				return false;
			}
				
			function setHeadersCss(table,$headers, list, css) {
				// remove all header information
				$headers.removeClass(css[0]).removeClass(css[1]);
				
				var h = [];
				$headers.each(function(offset) {
						if(!this.sortDisabled) {
							h[this.column] = $(this);					
						}
				});
				
				var l = list.length; 
				for(var i=0; i < l; i++) {
					h[list[i][0]].addClass(css[list[i][1]]);
				}
			}
			
			function fixColumnWidth(table,$headers) {
				var c = table.config;
				if(c.widthFixed) {
					var colgroup = $('<colgroup>');
					$("tr:first td",table.tBodies[0]).each(function() {
						colgroup.append($('<col>').css('width',$(this).width()));
					});
					$(table).prepend(colgroup);
				};
			}
			
			function updateHeaderSortCount(table,sortList) {
				var c = table.config, l = sortList.length;
				for(var i=0; i < l; i++) {
					var s = sortList[i], o = c.headerList[s[0]];
					o.count = s[1];
					o.count++;
				}
			}
			
			/* sorting methods */
			function multisort(table,sortList,cache) {
				
				
				if(table.config.debug) { var sortTime = new Date(); }
				
				var dynamicExp = "var sortWrapper = function(a,b) {", l = sortList.length;
					
				for(var i=0; i < l; i++) {