// Show or hide blocks. Used by More/Less locations. Will also hide the More link if it has the same name as the element + "_link".
function displayToggle(elementName, display) {
	if (display == null)
		display = "inline";
	element = document.getElementById(elementName);
	if (element.style.display == "none") {
		element.style.display = display;
		if (elementLink = document.getElementById(elementName + "_link"))
			elementLink.style.display = "none";
	}
	else if (element.style.display == display) {
		element.style.display = "none";
		if (elementLink = document.getElementById(elementName + "_link"))
			elementLink.style.display = display;
	}
}

function displayShow(elementName, display) {
	if (display == null)
		display = "inline";
	element = document.getElementById(elementName);
	element.style.display = display;
	if (elementLink = document.getElementById(elementName + "_link"))
		elementLink.style.display = "none";
}

function focusLabel(element, label) {
	if (element.value == label)
		element.value = '';
		element.className = '';
}

function blurLabel(element, label) {
	if (element.value == '') {
		element.value = label;
		element.className = 'label';
	}
}

// When a select box has the option "All", deselect that if any other option is selected. Useful for the select boxes in Advanced search. Mostly for n00bs that might get confused. This assumes that "All" is the first select option.
function unselectAll(obj) {
	for (var i = 1; i < obj.options.length; i++) {
		if (obj.options[i].selected) {
			obj.options[0].selected = false;
			break;
		}
	}	
}

// Sortable table from http://meta.wikimedia.org/skins-1.5/common/wikibits.js
// KW added: use <th sortdir="down/up"> to set the default sort direction

var ts_image_path = "/images/";
var ts_image_up = "sort_up.gif";
var ts_image_down = "sort_down.gif";
var ts_image_none = "sort_none.gif";
var ts_europeandate = false; // The non-American-inclined can change to "true"
var ts_alternate_row_colors = true;
var ts_number_transform_table = null;
var ts_number_regex = null;

function sortables_init() {
	var idnum = 0;
	// Find all tables with class sortable and make them sortable
	var tables = getElementsByClassName(document, "table", "sortable");
	for (var ti = 0; ti < tables.length ; ti++) {
		if (!tables[ti].id) {
			tables[ti].setAttribute('id','sortable_table_id_'+idnum);
			++idnum;
		}
		ts_makeSortable(tables[ti]);
	}
}

function ts_makeSortable(table) {
	var firstRow;
	if (table.rows && table.rows.length > 0) {
		if (table.tHead && table.tHead.rows.length > 0) {
			firstRow = table.tHead.rows[table.tHead.rows.length-1];
		} else {
			firstRow = table.rows[0];
		}
	}
	if (!firstRow) return;

	// We have a first row: assume it's the header, and make its contents clickable links
	for (var i = 0; i < firstRow.cells.length; i++) {
		var cell = firstRow.cells[i];
		if ((" "+cell.className+" ").indexOf(" unsortable ") == -1) {
			cell.innerHTML = '<a href="#" onclick="ts_resortTable(this);return false;"><div class="sortheader" sortdir="' + cell.getAttribute("sortdir") + '">' + cell.innerHTML + '</div></a>';
		}
	}
	if (ts_alternate_row_colors) {
		ts_alternate(table);
	}
}

function ts_getInnerText(el) {
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	if (el.textContent) return el.textContent; // not needed but it is faster
	if (el.innerText) return el.innerText;     // IE doesn't have textContent
	var str = "";

	var cs = el.childNodes;
	var l = cs.length;
	for (var i = 0; i < l; i++) {
		switch (cs[i].nodeType) {
			case 1: //ELEMENT_NODE
				str += ts_getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}
	return str;
}

function ts_resortTable(lnk) {
	// get the span
	var span = lnk.getElementsByTagName('div')[0];

	var td = lnk.parentNode;
	var tr = td.parentNode;
	var column = td.cellIndex;

	var table = tr.parentNode;
	while (table && !(table.tagName && table.tagName.toLowerCase() == 'table'))
		table = table.parentNode;
	if (!table) return;

	if (table.rows.length <= 1) return;

	// Generate the number transform table if it's not done already
	if (ts_number_transform_table == null) {
		ts_initTransformTable();
	}

	// Work out a type for the column
	// Skip the first row if that's where the headings are
	var rowStart = (table.tHead && table.tHead.rows.length > 0 ? 0 : 1);

	var itm = "";
	for (var i = rowStart; i < table.rows.length; i++) {
		if (table.rows[i].cells.length > column) {
			itm = ts_getInnerText(table.rows[i].cells[column]);
			itm = itm.replace(/^[\s\xa0]+/, "").replace(/[\s\xa0]+$/, "");
			if (itm != "") break;
		}
	}

	// TODO: bug 8226, localised date formats
	var sortfn = ts_sort_generic;
	var preprocessor = ts_toLowerCase;
	if (/^\d\d[\/. -][a-zA-Z]{3}[\/. -]\d\d\d\d$/.test(itm)) {
		preprocessor = ts_dateToSortKey;
	} else if (/^\d\d[\/.-]\d\d[\/.-]\d\d\d\d$/.test(itm)) {
		preprocessor = ts_dateToSortKey;
	} else if (/^\d\d[\/.-]\d\d[\/.-]\d\d$/.test(itm)) {
		preprocessor = ts_dateToSortKey;
	// pound dollar euro yen currency cents
	} else if (/(^[\u00a3$\u20ac\u00a4\u00a5]|\u00a2$)/.test(itm)) {
		preprocessor = ts_currencyToSortKey;
	} else if (ts_number_regex.test(itm)) {
		preprocessor = ts_parseFloat;
	}

	var reverse = (span.getAttribute("sortdir") == 'down');

	var newRows = new Array();
	for (var j = rowStart; j < table.rows.length; j++) {
		var row = table.rows[j];
		var keyText = ts_getInnerText(row.cells[column]);
		var oldIndex = (reverse ? -j : j);
		var preprocessed = preprocessor( keyText );

		newRows[newRows.length] = new Array(row, preprocessed, oldIndex);

	}

	newRows.sort(sortfn);

	if (reverse) {
		newRows.reverse();
		span.setAttribute('sortdir','up');
	} else {
		span.setAttribute('sortdir','down');
	}

	// KW: Empty rows are always sorted to the bottom
	while (!newRows[0][1]) {
		newRows.push(newRows.shift())
	}

	// We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
	// don't do sortbottom rows
	for (var i = 0; i < newRows.length; i++) {
		if ((" "+newRows[i][0].className+" ").indexOf(" sortbottom ") == -1)
			table.tBodies[0].appendChild(newRows[i][0]);
	}
	// do sortbottom rows only
	for (var i = 0; i < newRows.length; i++) {
		if ((" "+newRows[i][0].className+" ").indexOf(" sortbottom ") != -1)
			table.tBodies[0].appendChild(newRows[i][0]);
	}

	// Make other <th> not active
	var tds = tr.getElementsByTagName('th');
	for (var i = 0; i < tds.length; i++) {
		if (tds[i].getAttribute('class')) {
			tds[i].setAttribute('class', tds[i].getAttribute('class').replace('active', ''));
		}
	}

	td.setAttribute('class', td.getAttribute('class') + ' active');

	if (ts_alternate_row_colors) {
		ts_alternate(table);
	}
}

function ts_initTransformTable() {
	if ( typeof wgSeparatorTransformTable == "undefined"
			|| ( wgSeparatorTransformTable[0] == '' && wgDigitTransformTable[2] == '' ) )
	{
		digitClass = "[0-9,.]";
		ts_number_transform_table = false;
	} else {
		ts_number_transform_table = {};
		// Unpack the transform table
		// Separators
		ascii = wgSeparatorTransformTable[0].split("\t");
		localised = wgSeparatorTransformTable[1].split("\t");
		for ( var i = 0; i < ascii.length; i++ ) { 
			ts_number_transform_table[localised[i]] = ascii[i];
		}
		// Digits
		ascii = wgDigitTransformTable[0].split("\t");
		localised = wgDigitTransformTable[1].split("\t");
		for ( var i = 0; i < ascii.length; i++ ) { 
			ts_number_transform_table[localised[i]] = ascii[i];
		}

		// Construct regex for number identification
		digits = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ',', '\\.'];
		maxDigitLength = 1;
		for ( var digit in ts_number_transform_table ) {
			// Escape regex metacharacters
			digits.push( 
				digit.replace( /[\\\\$\*\+\?\.\(\)\|\{\}\[\]\-]/,
					function( s ) { return '\\' + s; } )
			);
			if (digit.length > maxDigitLength) {
				maxDigitLength = digit.length;
			}
		}
		if ( maxDigitLength > 1 ) {
			digitClass = '[' + digits.join( '', digits ) + ']';
		} else {
			digitClass = '(' + digits.join( '|', digits ) + ')';
		}
	}

	// We allow a trailing percent sign, which we just strip.  This works fine
	// if percents and regular numbers aren't being mixed.
	ts_number_regex = new RegExp(
		"^(" +
			"[+-]?[0-9][0-9,]*(\\.[0-9,]*)?(E[+-]?[0-9][0-9,]*)?" + // Fortran-style scientific
			"|" +
			"[+-]?" + digitClass + "+%?" + // Generic localised
		")$", "i"
	);
}

function ts_toLowerCase( s ) {
	return s.toLowerCase();
}

function ts_dateToSortKey(date) {	
	// y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
	if (date.length == 11) {
		switch (date.substr(3,3).toLowerCase()) {
			case "jan": var month = "01"; break;
			case "feb": var month = "02"; break;
			case "mar": var month = "03"; break;
			case "apr": var month = "04"; break;
			case "may": var month = "05"; break;
			case "jun": var month = "06"; break;
			case "jul": var month = "07"; break;
			case "aug": var month = "08"; break;
			case "sep": var month = "09"; break;
			case "oct": var month = "10"; break;
			case "nov": var month = "11"; break;
			case "dec": var month = "12"; break;
			// default: var month = "00";
		}
		return date.substr(7,4)+month+date.substr(0,2);
	} else if (date.length == 10) {
		if (ts_europeandate == false) {
			return date.substr(6,4)+date.substr(0,2)+date.substr(3,2);
		} else {
			return date.substr(6,4)+date.substr(3,2)+date.substr(0,2);
		}
	} else if (date.length == 8) {
		yr = date.substr(6,2);
		if (parseInt(yr) < 50) { 
			yr = '20'+yr; 
		} else { 
			yr = '19'+yr; 
		}
		if (ts_europeandate == true) {
			return yr+date.substr(3,2)+date.substr(0,2);
		} else {
			return yr+date.substr(0,2)+date.substr(3,2);
		}
	}
	return "00000000";
}

function ts_parseFloat( s ) {
	if ( !s ) {
		return 0;
	}
	if (ts_number_transform_table != false) {
		var newNum = '', c;
		
		for ( var p = 0; p < s.length; p++ ) {
			c = s.charAt( p );
			if (c in ts_number_transform_table) {
				newNum += ts_number_transform_table[c];
			} else {
				newNum += c;
			}
		}
		s = newNum;
	}

	num = parseFloat(s.replace(/,/g, ""));
	return (isNaN(num) ? s : num);
}

function ts_currencyToSortKey( s ) {
	return ts_parseFloat(s.replace(/[^0-9.,]/g,''));
}

function ts_sort_generic(a, b) {
	return a[1] < b[1] ? -1 : a[1] > b[1] ? 1 : a[2] - b[2];
}

function ts_alternate(table) {
	// Take object table and get all it's tbodies.
	var tableBodies = table.getElementsByTagName("tbody");
	// Loop through these tbodies
	for (var i = 0; i < tableBodies.length; i++) {
		// Take the tbody, and get all it's rows
		var tableRows = tableBodies[i].getElementsByTagName("tr");
		// Loop through these rows
		// Start at 1 because we want to leave the heading row untouched
		for (var j = 0; j < tableRows.length; j++) {
			// Check if j is even, and apply classes for both possible results
			var oldClasses = tableRows[j].className.split(" ");
			var newClassName = "";
			for (var k = 0; k < oldClasses.length; k++) {
				if (oldClasses[k] != "" && oldClasses[k] != "even" && oldClasses[k] != "odd")
					newClassName += oldClasses[k] + " ";
			}
			tableRows[j].className = newClassName + (j % 2 == 0 ? "even" : "odd");
		}
	}
}

function addEvent(elm, evType, fn, useCapture)
// addEvent and removeEvent
// cross-browser event handling for IE5+,	NS6 and Mozilla
// By Scott Andrew
{
	if (elm.addEventListener){
		elm.addEventListener(evType, fn, useCapture);
		return true;
	} else if (elm.attachEvent){
		var r = elm.attachEvent("on"+evType, fn);
		return r;
	} else {
		alert("Handler could not be removed");
	}
}

/*
	Written by Jonathan Snook, http://www.snook.ca/jonathan
	Add-ons by Robert Nyman, http://www.robertnyman.com
	Author says "The credit comment is all it takes, no license. Go crazy with it!:-)"
	From http://www.robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/
*/
function getElementsByClassName(oElm, strTagName, oClassNames){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	var arrRegExpClassNames = new Array();
	if(typeof oClassNames == "object"){
		for(var i=0; i<oClassNames.length; i++){
			arrRegExpClassNames[arrRegExpClassNames.length] =
				new RegExp("(^|\\s)" + oClassNames[i].replace(/\-/g, "\\-") + "(\\s|$)");
		}
	}
	else{
		arrRegExpClassNames[arrRegExpClassNames.length] =
			new RegExp("(^|\\s)" + oClassNames.replace(/\-/g, "\\-") + "(\\s|$)");
	}
	var oElement;
	var bMatchesAll;
	for(var j=0; j<arrElements.length; j++){
		oElement = arrElements[j];
		bMatchesAll = true;
		for(var k=0; k<arrRegExpClassNames.length; k++){
			if(!arrRegExpClassNames[k].test(oElement.className)){
				bMatchesAll = false;
				break;
			}
		}
		if(bMatchesAll){
			arrReturnElements[arrReturnElements.length] = oElement;
		}
	}
	return (arrReturnElements)
}

function redirectToFragment(fragment) {
	var match = navigator.userAgent.match(/AppleWebKit\/(\d+)/);
	if (match) {
		var webKitVersion = parseInt(match[1]);
		if (webKitVersion < 420) {
			// Released Safari w/ WebKit 418.9.1 messes up horribly
			// Nightlies of 420+ are ok
			return;
		}
	}
	if (is_gecko) {
		// Mozilla needs to wait until after load, otherwise the window doesn't scroll
		addOnloadHook(function () {
			if (window.location.hash == "")
				window.location.hash = fragment;
		});
	} else {
		if (window.location.hash == "")
			window.location.hash = fragment;
	}
}

/* 
	XmlHttpRequest Wrapper
	Version 1.2.2
	29 Jul 2005 
	adamv.com/dev/
*/

var Http = {
	ReadyState: {
		Uninitialized: 0,
		Loading: 1,
		Loaded:2,
		Interactive:3,
		Complete: 4
	},
		
	Status: {
		OK: 200,
		
		Created: 201,
		Accepted: 202,
		NoContent: 204,
		
		BadRequest: 400,
		Forbidden: 403,
		NotFound: 404,
		Gone: 410,
		
		ServerError: 500
	},
		
	Cache: {
		Get: 1,
		GetCache: 2,
		GetNoCache: 3,
		FromCache: 4
	},
	
	Method: {Get: "GET", Post: "POST", Put: "PUT", Delete: "DELETE"},
	
	enabled: false,
	logging: false,
	_get: null,	// Reference to the XmlHttpRequest object
	_cache: new Object(),
	
	Init: function(){
		Http._get = Http._getXmlHttp()
		Http.enabled = (Http._get != null)
		Http.logging = (window.Logging != null);
	},
	
	_getXmlHttp: function(){
	/*@cc_on @*//*@if (@_jscript_version >= 5)
		try { return new ActiveXObject("Msxml2.XMLHTTP"); } 
		catch (e) {} 
		try { return new ActiveXObject("Microsoft.XMLHTTP"); } 
		catch (e) {} 
	@end @*/
		try { return new XMLHttpRequest();}
		catch (e) {}

		return null;
	},

/*
	Params:
		url: The URL to request. Required.
		cache: Cache control. Defaults to Cache.Get.
		callback: onreadystatechange function, called when request is completed. Optional.
		method: HTTP method. Defaults to Method.Get.
*/
	get: function(params, callback_args){	
		if (!Http.enabled) throw "Http: XmlHttpRequest not available.";
		
		var url = params.url;
		if (!url) throw "Http: A URL must be specified";
				
		var cache = params.cache || Http.Cache.Get;
		var method = params.method || Http.Method.Get;
		var callback = params.callback;
		
		if ((cache == Http.Cache.FromCache) || (cache == Http.Cache.GetCache))
		{
			var in_cache = Http.from_cache(url, callback, callback_args)

			if (Http.logging){
				Logging.log(["Http: URL in cache: " + in_cache]);
			}

			if (in_cache || (cache == Http.Cache.FromCache)) return in_cache;
		}
		
		if (cache == Http.Cache.GetNoCache)
		{
			var sep = (-1 < url.indexOf("?")) ? "&" : "?"	
			url = url + sep + "__=" + encodeURIComponent((new Date()).getTime());
		}
	
		// Only one request at a time, please
		if ((Http._get.readyState != Http.ReadyState.Uninitialized) && 
			(Http._get.readyState != Http.ReadyState.Complete)){
			this._get.abort();
			
			if (Http.logging){
				Logging.log(["Http: Aborted request in progress."]);
			}
		}
		
		Http._get.open(method, url, true);

		Http._get.onreadystatechange =  function() {
			if (Http._get.readyState != Http.ReadyState.Complete) return;
			
			if (Http.logging){
				Logging.log(["Http: Returned, status: " + Http._get.status]);
			}

			if ((cache == Http.Cache.GetCache) && (Http._get.status == Http.Status.OK)){
				Http._cache[url] = Http._get.responseText;
			}
			
			if (callback_args == null) callback_args = new Array();

			var cb_params = new Array();
			cb_params.push(Http._get);
			for(var i=0;i<callback_args.length;i++)
				cb_params.push(callback_args[i]);
				
			callback.apply(null, cb_params);
		}
		
		if(Http.logging){
			Logging.log(["Http: Started\n\tURL: " + url + "\n\tMethod: " + method + "; Cache: " + Hash.keyName(Http.Cache,cache)])
		}
		
		Http._get.send(params.body || null);
	},
	
	from_cache: function(url, callback, callback_args){
		var result = Http._cache[url];
		
		if (result != null) {
			var response = new Http.CachedResponse(result)
			
			var cb_params = new Array();
			cb_params.push(response);
			for(var i=0;i<callback_args.length;i++)
				cb_params.push(callback_args[i]);
							
			callback.apply(null, cb_params);
				
			return true
		}
		else
			return false
	},
	
	clear_cache: function(){
		Http._cache = new Object();
	},
	
	is_cached: function(url){
		return Http._cache[url]!=null;
	},
	
	CachedResponse: function(response) {
		this.readyState = Http.ReadyState.Complete
		this.status = Http.Status.OK
		this.responseText = response
	}	
}

Http.Init()

function json_response(response){
	var js = response.responseText;
	try{
		return eval(js); 
	} catch(e){
		if (Http.logging){
			Logging.logError(["json_response: " + e]);
		}
		else{
			alert("Error: " + e + "\n" + js);
		}
		return null;
	}
}

function getResponseProps(response, header){
	try {
		var s = response.getResponseHeader(header || 'X-Ajax-Props');
		if (s==null || s=="")
			return new Object()
		else
			return eval("o="+s)
	} catch (e) { return new Object() }
}

function changeLocale(selectElement)
{
	var locale = selectElement[selectElement.selectedIndex].value;

	var form = selectElement.form;
	Http.get({
	url: "/select_options?select=neighborhoods&locale=" +  locale,
	callback: fillSelect,
	cache: Http.Cache.Get
	}, [form]);
}

function fillSelect(xmlReply, form)
{
	var selects = new Array(2);
	selects[0] = "type[]";
	selects[1] = "cuisine[]";
	selects[2] = "neighborhood[]";
	if (xmlReply.status == Http.Status.OK)
	{
		sections = xmlReply.responseText.split("===\n");
		for (var i = 0; section = sections[i]; i++) {
			var selectElement = form.elements[selects[i]];
			var selectOptions = section.split("\n");
			selectElement.length = selectOptions.length;
			for (var j = 1; j < selectOptions.length; j++) {
				var selectOption = selectOptions[j-1].split("|");
				selectElement[j].value = selectOption[0];
				selectElement[j].text = selectOption[1];
			}
		}
	}
	else
	{
		alert("Cannot handle the Ajax call.");
	}
}