text: /*
  ---
  
  description: A plugin for enabling autocomplete of a text input or textarea.
  
  authors:
   - Fábio Miranda Costa
  
  requires:
   - Core/Class.Extras
   - Core/Element.Event
   - Core/Element.Style
   - More/Element.Forms
  
  license: MIT-style license
  
  provides: [Meio.Autocomplete]
  
  ...
  */
  
  (function(global, $){
  
  	var browser = Browser; // better compression and faster
  
  	// Custom Events
  
  	// thanks Jan Kassens
  	Object.append(Element.NativeEvents, {
  		'paste': 2, 'input': 2
  	});
  	Element.Events.paste = {
  		base : (browser.opera || (browser.firefox && browser.version < 3)) ? 'input' : 'paste',
  		condition: function(e){
  			this.fireEvent('paste', e, 1);
  			return false;
  		}
  	};
  	
  	// the key event that repeats
  	Element.Events.keyrepeat = {
  		base : (browser.firefox || browser.opera) ? 'keypress' : 'keydown',
  		condition: Function.from(true)
  	};
  	
  	// Autocomplete itself
  
  	var Meio = global.Meio || {};
  	var globalCache;
  	
  	var keysThatDontChangeValueOnKeyUp = {
  		9:   1,  // tab
  		16:  1,  // shift
  		17:  1,  // control
  		18:  1,  // alt
  		224: 1,  // command (meta onkeypress)
  		91:  1,  // command (meta onkeydown)
  		37:  1,  // left
  		38:  1,  // up
  		39:  1,  // right
  		40:  1   // down
  	}; 
  	
  	var encode = function(str){
  		return str.replace(/"/g, '&quot;').replace(/'/g, '&#39;');
  	};
  	
  	Meio.Widget = new Class({
  		
  		initialize: function(){
  			this.elements = {};
  		},
  		
  		addElement: function(name, obj){
  			this.elements[name] = obj;
  		},
  		
  		addEventToElement: function(name, eventName, event){
  			this.elements[name].addEvent(eventName, event.bind(this));
  		},
  		
  		addEventsToElement: function(name, events){
  			for (var eventName in events){
  				this.addEventToElement(name, eventName, events[eventName]);
  			}
  		},
  		
  		attach: function(){
  			for (var element in this.elements){
  				this.elements[element].attach();
  			}
  		},
  		
  		detach: function(){
  			for (var element in this.elements){
  				this.elements[element].detach();
  			}
  		},
  		
  		destroy: function(){
  			for (var element in this.elements){
  				this.elements[element] && this.elements[element].destroy();
  			}
  		}
  	});
  	
  	Meio.Autocomplete = new Class({
  		
  		Extends: Meio.Widget,
  		
  		Implements: [Options, Events],
  		
  		options: {
  			
  			delay: 200,
  			minChars: 0,
  			cacheLength: 20,
  			selectOnTab: true,
  			maxVisibleItems: 10,
  			cacheType: 'shared', // 'shared' or 'own'
  			
  			filter: {
  				/*
  					its posible to pass the filters directly or by passing a type and optionaly a path.
  					
  					filter: function(text, data){}
  					formatMatch: function(text, data, i){}
  					formatItem: function(text, data){}
  					
  					or
  					
  					type: 'startswith' or 'contains' // can be any defined on the Meio.Autocomplete.Filter object
  					path: 'a.b.c' // path to the text value on each object thats contained on the data array
  				*/
  			},
  			
  			/*
  			onNoItemToList: function(elements){},
  			onSelect: function(elements, value){},
  			onDeselect: function(elements){},
  			*/
  			
  			fieldOptions: {}, // see Element options
  			listOptions: {}, // see List options
  			requestOptions: {}, // see DataRequest options
  			urlOptions: {} // see URL options
  			
  		},
  		
  		initialize: function(input, data, options, listInstance){
  			this.parent();
  			this.setOptions(options);
  			this.active = 0;
  			
  			this.filters = Meio.Autocomplete.Filter.get(this.options.filter);
  			
  			this.addElement('list', listInstance || new Meio.Element.List(this.options.listOptions));
  			this.addListEvents();
  			
  			this.addElement('field', new Meio.Element.Field(input, this.options.fieldOptions));
  			this.addFieldEvents();
  			
  			this.addSelectEvents();
  			
  			this.attach();
  			this.initCache();
  			this.initData(data);
  		},
  		
  		addFieldEvents: function(){
  			this.addEventsToElement('field', {
  				'beforeKeyrepeat': function(e){
  					this.active = 1;
  					var e_key = e.key, list = this.elements.list;
  					if (e_key == 'up' || e_key == 'down' || (e_key == 'enter' && list.showing)) e.preventDefault();
  				},
  				'delayedKeyrepeat': function(e){
  					var e_key = e.key, field = this.elements.field;
  					field.keyPressControl[e_key] = true;
  					switch (e_key){
  					case 'up': case 'down':
  						this.focusItem(e_key);
  						break;
  					case 'enter':
  						this.setInputValue();
  						break;
  					case 'tab':
  						if (this.options.selectOnTab) this.setInputValue();
  						field.keyPressControl[e_key] = false; // tab blurs the input so the keyup event wont happen at the same input you made a keydown
  						break;
  					case 'esc':
  						this.elements.list.hide();
  						break;
  					default:
  						this.setupList();
  					}
  					this.oldInputedText = field.node.get('value');
  				},
  				'keyup': function(e){
  					var field = this.elements.field;
  					if (!keysThatDontChangeValueOnKeyUp[e.code]){
  						if (!field.keyPressControl[e.key]) this.setupList();
  						field.keyPressControl[e.key] = false;
  					}
  				},
  				'focus': function(){
  					this.active = 1;
  					var list = this.elements.list;
  					list.focusedItem = null;
  					list.positionNextTo(this.elements.field.node);
  				},
  				'click': function(){
  					if (++this.active > 2 && !this.elements.list.showing){
  						this.forceSetupList();
  					}
  				},
  				'blur': function(e){
  					this.active = 0;
  					var list = this.elements.list;
  					if (list.shouldNotBlur){
  						this.elements.field.node.setCaretPosition('end');
  						list.shouldNotBlur = false;
  						if (list.focusedItem) list.hide();
  					} else {
  						list.hide();
  					}
  				},
  				'paste': function(){
  					return this.setupList();
  				}
  			});
  		},
  		
  		addListEvents: function(){
  			this.addEventsToElement('list', {
  				'mousedown': function(e){
  					if (this.active && !e.dontHide) this.setInputValue();
  				}
  			});
  		},
  		
  		update: function(){
  			var data = this.data, list = this.elements.list;
  			var cacheKey = data.getKey(), cached = this.cache.get(cacheKey), html;
  			if (cached){
  				html = cached.html;
  				this.itemsData = cached.data;
  			} else {
  				data = data.get();
  				var itemsHtml = [], itemsData = [], classes = list.options.classes, text = this.inputedText;
  				var filter = this.filters.filter, formatMatch = this.filters.formatMatch, formatItem = this.filters.formatItem;
  				for (var row, i = 0, n = 0; row = data[i++];) if (filter.call(this, text, row)){
  					itemsHtml.push(
  						'<li title="', encode(formatMatch.call(this, text, row)),
  						'" data-index="', n,
  						'" class="', (n%2 ? classes.even : classes.odd), '">',
  						formatItem.call(this, text, row, n),
  						'</li>'
  					);
  					itemsData.push(row);
  					n++;
  				}
  				html = itemsHtml.join('');
  				this.cache.set(cacheKey, {html: html, data: itemsData});
  				this.itemsData = itemsData;
  			}
  			list.focusedItem = null;
  			this.fireEvent('deselect', [this.elements]);
  			list.list.set('html', html);
  			if (this.options.maxVisibleItems) list.applyMaxHeight(this.options.maxVisibleItems);
  		},
  		
  		setupList: function(){
  			this.inputedText = this.elements.field.node.get('value');
  			if (this.inputedText !== this.oldInputedText){
  				this.forceSetupList(this.inputedText);
  			} else {
  				this.elements.list.hide();
  			}
  			return true;
  		},
  		
  		forceSetupList: function(inputedText){
  			inputedText = inputedText || this.elements.field.node.get('value');
  			if (inputedText.length >= this.options.minChars){
  				clearInterval(this.prepareTimer);
  				this.prepareTimer = this.data.prepare.delay(this.options.delay, this.data, this.inputedText);
  			}
  		},
  		
  		dataReady: function(){
  			this.update();
  			if (this.onUpdate){
  				this.onUpdate();
  				this.onUpdate = null;
  			}
  			var list = this.elements.list;
  			if (list.list.get('html')){
  				if (this.active) list.show();
  			} else {
  				this.fireEvent('noItemToList', [this.elements]);
  				list.hide();
  			}
  		},
  		
  		setInputValue: function(){
  			var list = this.elements.list;
  			if (list.focusedItem){
  				var text = list.focusedItem.get('title');
  				this.elements.field.node.set('value', text);
  				var index = list.focusedItem.get('data-index');
  				this.fireEvent('select', [this.elements, this.itemsData[index], text, index]);
  			}
  			list.hide();
  		},
  		
  		focusItem: function(direction){
  			var list = this.elements.list;
  			if (list.showing){
  				list.focusItem(direction);
  			} else {
  				this.forceSetupList();
  				this.onUpdate = function(){ list.focusItem(direction); };
  			}
  		},
  		
  		addSelectEvents: function(){
  			this.addEvents({
  				select: function(elements){
  					elements.field.addClass('selected');
  				},
  				deselect: function(elements){
  					elements.field.removeClass('selected');
  				}
  			});
  		},
  		
  		initData: function(data){
  			this.data = (typeOf(data) == 'string') ?
  				new Meio.Autocomplete.Data.Request(data, this.cache, this.elements.field, this.options.requestOptions, this.options.urlOptions) :
  				new Meio.Autocomplete.Data(data, this.cache);
  			this.data.addEvent('ready', this.dataReady.bind(this));
  		},
  		
  		initCache: function(){
  			var cacheLength = this.options.cacheLength;
  			if (this.options.cacheType == 'shared'){
  				this.cache = globalCache;
  				this.cache.setMaxLength(cacheLength);
  			} else { // 'own'
  				this.cache = new Meio.Autocomplete.Cache(cacheLength);
  			}
  		},
  		
  		refreshCache: function(cacheLength){
  			this.cache.refresh();
  			this.cache.setMaxLength(cacheLength || this.options.cacheLength);
  		},
  		
  		refreshAll: function(cacheLength, urlOptions){
  			// TODO, do you really need to refresh the url? see a better way of doing this
  			this.refreshCache(cacheLength);
  			this.data.refreshKey(urlOptions);
  		}
  
  	});
  	
  	// This is the same autocomplete class but it acts like a normal select element.
  	// When you select an option from the autocomplete it will set the value of a given element (valueField)
  	// with the return of the valueFilter.
  	// if the syncAtInit option is set to true, it will synchonize the value of the autocomplete with the corresponding data
  	// from the valueField's value.
  	// to understand better see the user specs.
  	
  	Meio.Autocomplete.Select = new Class({
  		
  		Extends: Meio.Autocomplete,
  		
  		options: {
  			syncName: 'id', // if falsy it wont sync at start
  			valueField: null,
  			valueFilter: function(data){
  				return data.id;
  			}
  		},
  		
  		// overwritten
  		initialize: function(input, data, options, listInstance){
  			this.parent(input, data, options, listInstance);
  			this.valueField = $(this.options.valueField);
  			
  			if (!this.valueField) return;
  			
  			this.syncWithValueField(data);
  		},
  		
  		syncWithValueField: function(data){
  			var value = this.getValueFromValueField();
  			
  			if (value && this.options.syncName){
  				this.addParameter(data);
  				this.addDataReadyEvent(value);
  				this.data.prepare(this.elements.field.node.get('value'));
  			} else {
  				this.addValueFieldEvents();
  			}
  		},
  		
  		addValueFieldEvents: function(){
  			this.addEvents({
  				'select': function(elements, data){
  					this.valueField.set('value', this.options.valueFilter.call(this, data));
  				},
  				'deselect': function(elements){
  					this.valueField.set('value', '');
  				}
  			});
  		},
  		
  		addParameter: function(data){
  			this.parameter = {
  				name: this.options.syncName,
  				value: function(){
  					return this.valueField.value;
  				}.bind(this)
  			};
  			if (this.data.url) this.data.url.addParameter(this.parameter);
  		},
  		
  		addDataReadyEvent: function(value){
  			var self = this;
  			var runOnce = function(){
  				self.addValueFieldEvents();
  				var values = this.get();
  				for (var i = values.length; i--;){
  					if (self.options.valueFilter.call(self, values[i]) == value){
  						var text = self.filters.formatMatch.call(self, '', values[i], 0);
  						self.elements.field.node.set('value', text);
  						self.fireEvent('select', [self.elements, values[i], text, i]);
  						break;
  					}
  				}
  				if (this.url) this.url.removeParameter(self.parameter);
  				this.removeEvent('ready', runOnce);
  			};
  			this.data.addEvent('ready', runOnce);
  		},
  		
  		getValueFromValueField: function(){
  			return this.valueField.get('value');
  		}
  		
  	});
  	
  	// Transforms a select on an autocomplete field
  	
  	Meio.Autocomplete.Select.One = new Class({
  		
  		Extends: Meio.Autocomplete.Select,
  		
  		options: {
  			filter: {
  				path: 'text' // path to the text value on each object thats contained on the data array
  			}
  		},
  		
  		//overwritten
  		initialize: function(select, options, listInstance){
  			this.select = $(select);
  			this.replaceSelect();
  			this.parent(this.field, this.createDataArray(), Object.merge(options || {}, {
  				valueField: this.select,
  				valueFilter: function(data){ return data.value; }
  			}), listInstance);
  		},
  		
  		replaceSelect: function(){
  			var selectedOption = this.select.getSelected()[0];
  			this.field = new Element('input', {type: 'text'});
  			var optionValue = selectedOption.get('value');
  			if (optionValue || optionValue === 0) this.field.set('value', selectedOption.get('html'));
  			this.select.setStyle('display', 'none');
  			this.field.inject(this.select, 'after');
  		},
  		
  		createDataArray: function(){
  			var selectOptions = this.select.options, data = [];
  			for(var i = 0, selectOption, optionValue; selectOption = selectOptions[i++];){
  				optionValue = selectOption.value;
  				if (optionValue || optionValue === 0) data.push({value: optionValue, text: selectOption.innerHTML});
  			}
  			return data;
  		},
  		
  		addValueFieldEvents: function(){
  			this.addEvents({
  				'select': function(elements, data, text, index){
  					var option = this.valueField.getElement('option[value="' + this.options.valueFilter.call(this, data) + '"]');
  					if (option) option.selected = true;
  				},
  				'deselect': function(elements){
  					var option = this.valueField.getSelected()[0];
  					if (option) option.selected = false;
  				}
  			});
  		},
  		
  		getValueFromValueField: function(){
  			return this.valueField.getSelected()[0].get('value');
  		}
  		
  	});
  	
  	Meio.Element = new Class({
  		
  		Implements: [Events],
  		
  		initialize: function(node){
  			this.setNode(node);
  			this.createBoundEvents();
  			this.attach();
  		},
  		
  		setNode: function(node){
  			this.node = node ? $(node) || $$(node)[0] : this.render();
  		},
  		
  		createBoundEvents: function(){
  			this.bound = {};
  			this.boundEvents.each(function(evt){
  				this.bound[evt] = function(e){
  					this.fireEvent('before' + evt.capitalize(), e);
  					this[evt] && this[evt](e);
  					this.fireEvent(evt, e);
  					return true;
  				}.bind(this);
  			}, this);
  		},
  		
  		attach: function(){
  			for (var e in this.bound){
  				this.node.addEvent(e, this.bound[e]);
  			}
  		},
  		
  		detach: function(){
  			for (var e in this.bound){
  				this.node.removeEvent(e, this.bound[e]);
  			}
  		},
  		
  		addClass: function(type){
  			this.node.addClass(this.options.classes[type]);
  		},
  		
  		removeClass: function(type){
  			this.node.removeClass(this.options.classes[type]);
  		},
  		
  		toElement: function(){
  			this.node;
  		},
  		
  		render: function(){}
  		
  	});
  
  	Meio.Element.Field = new Class({
  		
  		Extends: Meio.Element,
  		
  		Implements: [Options],
  		
  		options: {
  			classes: {
  				loading: 'ma-loading',
  				selected: 'ma-selected'
  			}
  		},
  		
  		initialize: function(field, options){
  			this.keyPressControl = {};
  			this.boundEvents = ['paste', 'focus', 'blur', 'click', 'keyup', 'keyrepeat'];
  			if (browser.ie6) this.boundEvents.push('keypress'); // yeah super ugly, but what can be awesome with ie?
  			this.setOptions(options);
  			this.parent(field);
  			
  			$(global).addEvent('unload', function(){
  				if (this.node) this.node.set('autocomplete', 'on'); // if autocomplete is off when you reload the page the input value gets erased
  			}.bind(this));
  		},
  		
  		setNode: function(element){
  			this.parent(element);
  			this.node.set('autocomplete', 'off');
  		},
  		
  		// this let me get the value of the input on keydown and keypress
  		keyrepeat: function(e){
  			clearInterval(this.keyrepeatTimer);
  			this.keyrepeatTimer = this._keyrepeat.delay(1, this, e);
  		},
  		
  		_keyrepeat: function(e){
  			this.fireEvent('delayedKeyrepeat', e);
  		},
  		
  		destroy: function(){
  			this.detach();
  			this.node.removeAttribute('autocomplete');
  		},
  		
  		// ie6 only, uglyness
  		// this fix the form being submited on the press of the enter key
  		keypress: function(e){
  			if (e.key == 'enter') this.bound.keyrepeat(e);
  		}
  		
  	});
  
  	Meio.Element.List = new Class({
  		
  		Extends: Meio.Element,
  		
  		Implements: [Options],
  		
  		options: {
  			width: 'field', // you can pass any other value settable by set('width') to the list container
  			classes: {
  				container: 'ma-container',
  				hover: 'ma-hover',
  				odd: 'ma-odd',
  				even: 'ma-even'
  			}
  		},
  		
  		initialize: function(options){
  			this.boundEvents = ['mousedown', 'mouseover'];
  			this.setOptions(options);
  			this.parent();
  			this.focusedItem = null;
  		},
  		
  		applyMaxHeight: function(maxVisibleItems){
  			var listChildren = this.list.childNodes;
  			var node = listChildren[maxVisibleItems - 1] || (listChildren.length ? listChildren[listChildren.length - 1] : null);
  			if (!node) return;
  			node = $(node);
  			// uggly hack to fix the height of the autocomplete list
  			for (var i = 2; i--;) this.node.setStyle('height', node.getCoordinates(this.list).bottom);
  		},
  		
  		mouseover: function(e){
  			var item = this.getItemFromEvent(e), hoverClass = this.options.classes.hover;
  			if (!item) return true;
  			if (this.focusedItem) this.focusedItem.removeClass(hoverClass);
  			item.addClass(hoverClass);
  			this.focusedItem = item;
  			this.fireEvent('focusItem', [this.focusedItem]);
  		},
  		
  		mousedown: function(e){
  			e.preventDefault();
  			this.shouldNotBlur = true;
  			if (!(this.focusedItem = this.getItemFromEvent(e))){
  				e.dontHide = true;
  				return true;
  			} 
  			this.focusedItem.removeClass(this.options.classes.hover);
  		},
  		
  		focusItem: function(direction){
  			var hoverClass = this.options.classes.hover, newFocusedItem;
  			if (this.focusedItem){
  				if ((newFocusedItem = this.focusedItem[direction == 'up' ? 'getPrevious' : 'getNext']())){
  					this.focusedItem.removeClass(hoverClass);
  					newFocusedItem.addClass(hoverClass);
  					this.focusedItem = newFocusedItem;
  					this.scrollFocusedItem(direction);
  				}
  			} else {
  				if ((newFocusedItem = this.list.getFirst())){
  					newFocusedItem.addClass(hoverClass);
  					this.focusedItem = newFocusedItem;
  				}
  			}
  		},
  		
  		scrollFocusedItem: function(direction){
  			var focusedItemCoordinates = this.focusedItem.getCoordinates(this.list),
  				scrollTop = this.node.scrollTop;
  			if (direction == 'down'){
  				var delta = focusedItemCoordinates.bottom - this.node.getStyle('height').toInt();
  				if ((delta - scrollTop) > 0){
  					this.node.scrollTop = delta;
  				}
  			} else {
  				var top = focusedItemCoordinates.top;
  				if (scrollTop && scrollTop > top){
  					this.node.scrollTop = top;
  				}
  			}
  		},
  		
  		getItemFromEvent: function(e){
  			var target = e.target;
  			while (target && target.tagName.toLowerCase() != 'li'){
  				if (target === this.node) return null;
  				target = target.parentNode;
  			}
  			return $(target);
  		},
  		
  		render: function(){
  			var node = new Element('div', {'class': this.options.classes.container});
  			if (node.bgiframe) node.bgiframe({top: 0, left: 0});
  			this.list = new Element('ul').inject(node);
  			$(document.body).grab(node);
  			return node;
  		},
  		
  		positionNextTo: function(fieldNode){
  			var width = this.options.width, listNode = this.node;
  			var elPosition = fieldNode.getCoordinates();
  			listNode.setStyle('width', width == 'field' ? fieldNode.getWidth().toInt() - listNode.getStyle('border-left-width').toInt() - listNode.getStyle('border-right-width').toInt() : width);
  			listNode.setPosition({x: elPosition.left, y: elPosition.bottom});
  		},
  		
  		show: function(){
  			this.node.scrollTop = 0;
  			this.node.setStyle('visibility', 'visible');
  			this.showing = true;
  		},
  		
  		hide: function(){
  			this.showing = false;
  			this.node.setStyle('visibility', 'hidden');
  		}
  		
  	});
  	
  	Meio.Autocomplete.Filter = {
  		
  		filters: {},
  		
  		get: function(options){
  			var type = options.type, keys = (options.path || '').split('.');
  			var filters = (type && this.filters[type]) ? this.filters[type](this, keys) : options;
  			return Object.merge(this.defaults(keys), filters);
  		},
  		
  		define: function(name, options){
  			this.filters[name] = options;
  		},
  		
  		defaults: function(keys){
  			var self = this;
  			return {
  				filter: function(text, data){
  					return text ? self._getValueFromKeys(data, keys).test(new RegExp(text.escapeRegExp(), 'i')) : true;
  				},
  				formatMatch: function(text, data){
  					return self._getValueFromKeys(data, keys);
  				},
  				formatItem: function(text, data, i){
  					return text ? self._getValueFromKeys(data, keys).replace(new RegExp('(' + text.escapeRegExp() + ')', 'gi'), '<strong>$1</strong>') : self._getValueFromKeys(data, keys);
  				}
  			};
  		},
  		
  		_getValueFromKeys: function(obj, keys){
  			var key, value = obj;
  			for (var i = 0; key = keys[i++];) value = value[key];
  			return value;
  		}
  		
  	};
  	
  	Meio.Autocomplete.Filter.define('contains', function(self, keys){return {};});
  	Meio.Autocomplete.Filter.define('startswith', function(self, keys){
  		return {
  			filter: function(text, data){
  				return text ? self._getValueFromKeys(data, keys).test(new RegExp('^' + text.escapeRegExp(), 'i')) : true;
  			}
  		};
  	});
  	
  	Meio.Autocomplete.Data = new Class({
  		
  		Implements: [Options, Events],
  		
  		initialize: function(data, cache){
  			this._cache = cache;
  			this.data = data;
  			this.dataString = JSON.encode(this.data);
  		},
  		
  		get: function(){
  			return this.data;
  		},
  		
  		getKey: function(){
  			return this.cachedKey;
  		},
  		
  		prepare: function(text){
  			this.cachedKey = this.dataString + (text || '');
  			this.fireEvent('ready');
  		},
  		
  		cache: function(key, data){
  			this._cache.set(key, data);
  		},
  		
  		refreshKey: function(){}
  		
  	});
  	
  	Meio.Autocomplete.Data.Request = new Class({
  		
  		Extends: Meio.Autocomplete.Data,
  		
  		options: {
  			noCache: true,
  			formatResponse: function(jsonResponse){
  				return jsonResponse;
  			}
  		},
  		
  		initialize: function(url, cache, element, options, urlOptions){
  			this.setOptions(options);
  			this.rawUrl = url;
  			this._cache = cache;
  			this.element = element;
  			this.urlOptions = urlOptions;
  			this.refreshKey();
  			this.createRequest();
  		},
  		
  		prepare: function(text){
  			this.cachedKey = this.url.evaluate(text);
  			if (this._cache.has(this.cachedKey)){
  				this.fireEvent('ready');
  			} else {
  				this.request.send({url: this.cachedKey});
  			}
  		},
  		
  		createRequest: function(){
  			var self = this;
  			this.request = new Request.JSON(this.options);
  			this.request.addEvents({
  				request: function(){
  					self.element.addClass('loading');
  				},
  				complete: function(){
  					self.element.removeClass('loading');
  				},
  				success: function(jsonResponse){
  					self.data = self.options.formatResponse(jsonResponse);
  					self.fireEvent('ready');
  				}
  			});
  		},
  		
  		refreshKey: function(urlOptions){
  			urlOptions = Object.merge(this.urlOptions, {url: this.rawUrl}, urlOptions || {});
  			this.url = new Meio.Autocomplete.Data.Request.URL(urlOptions.url, urlOptions);
  		}
  		
  	});
  	
  	Meio.Autocomplete.Data.Request.URL = new Class({
  		
  		Implements: [Options],
  		
  		options: {
  			queryVarName: 'q',
  			extraParams: null,
  			max: 20
  		},
  		
  		initialize: function(url, options){
  			this.setOptions(options);
  			this.rawUrl = url;
  			this.url = url;
  			this.url += this.url.contains('?') ? '&' : '?';
  			this.dynamicExtraParams = [];
  			var params = Array.from(this.options.extraParams);
  			for (var i = params.length; i--;){
  				this.addParameter(params[i]);
  			}
  			if (this.options.max) this.addParameter('limit=' + this.options.max);
  		},
  		
  		evaluate: function(text){
  			text = text || '';
  			var params = this.dynamicExtraParams, url = [];
  			url.push(this.options.queryVarName + '=' + encodeURIComponent(text));
  			for (var i = params.length; i--;){
  				url.push(encodeURIComponent(params[i].name) + '=' + encodeURIComponent(Function.from(params[i].value)()));
  			}
  			return this.url + url.join('&');
  		},
  		
  		addParameter: function(param){
  			if (param.nodeType == 1 || typeOf(param.value) == 'function'){
  				this.dynamicExtraParams.push(param);
  			} else {
  				this.url += ((typeOf(param) == 'string') ? param : encodeURIComponent(param.name) + '=' + encodeURIComponent(param.value)) + '&';
  			}
  		},
  		
  		// TODO remove non dynamic parameters
  		removeParameter: function(param){
  			this.dynamicExtraParams.erase(param);
  		}
  		
  	});
  	
  	Meio.Autocomplete.Cache = new Class({
  		
  		initialize: function(maxLength){
  			this.refresh();
  			this.setMaxLength(maxLength);
  		},
  		
  		set: function(key, value){
  			if (!this.cache[key]){
  				if (this.getLength() >= this.maxLength){
  					var keyToRemove = this.pos.shift();
  					this.cache[keyToRemove] = null;
  					delete this.cache[keyToRemove];
  				}
  				this.cache[key] = value;
  				this.pos.push(key);
  			}
  			return this;
  		},
  		
  		get: function(key){
  			return this.cache[key || ''] || null;
  		},
  		
  		has: function(key){
  			return !!this.get(key);
  		},
  		
  		getLength: function(){
  			return this.pos.length;
  		},
  		
  		refresh: function(){
  			this.cache = {};
  			this.pos = [];
  		},
  		
  		setMaxLength: function(maxLength){
  			this.maxLength = Math.max(maxLength, 1);
  		}
  		
  	});
  	
  	globalCache = new Meio.Autocomplete.Cache();
  	
  	global.Meio = Meio;
  	
  })(this, document.id || $);
  