jQuery.fn.extend({ autocomplete: function(urlOrData, options) { var isUrl = typeof urlOrData == "string"; options = jQuery.extend({}, jQuery.Autocompleter.defaults, { url: isUrl ? urlOrData : null, data: isUrl ? null : urlOrData, delay: isUrl ? jQuery.Autocompleter.defaults.delay : 10
}, options); return this.each(function() { new jQuery.Autocompleter(this, options);});}, result: function(handler) { return this.bind("result", handler);}, search: function() { return this.trigger("search");}
}); jQuery.Autocompleter = function(input, options) { var KEY = { UP: 38, DOWN: 40, DEL: 46, TAB: 9, RETURN: 13, ESC: 27, COMMA: 188
}; var $input = $(input).attr("autocomplete", "off").addClass(options.inputClass); var timeout; var previousValue = ""; var cache = jQuery.Autocompleter.Cache(options); var hasFocus = 0; var lastKeyPressCode; var select = jQuery.Autocompleter.Select(options, input, selectCurrent); $input.keydown(function(event) { lastKeyPressCode = event.keyCode; switch(event.keyCode) { case KEY.UP:
event.preventDefault(); if ( select.visible() ) { select.prev();} else { onChange(0, true);}
break; case KEY.DOWN:
event.preventDefault(); if ( select.visible() ) { select.next();} else { onChange(0, true);}
break; case options.multiple && jQuery.trim(options.multipleSeparator) == "," && KEY.COMMA:
case KEY.TAB:
case KEY.RETURN:
if( selectCurrent() ){ if( !options.multiple )
$input.blur(); event.preventDefault();}
break; case KEY.ESC:
select.hide(); break; default:
clearTimeout(timeout); timeout = setTimeout(onChange, options.delay); break;}
}).keypress(function() { }).focus(function(){ hasFocus++;}).blur(function() { hasFocus = 0; hideResults();}).click(function() { if ( hasFocus++ > 1 && !select.visible() ) { onChange(0, true);}
}).bind("search", function() { function findValueCallback(q, data) { var result; if( data && data.length ) { for (var i=0; i < data.length; i++) { if( data[i].result.toLowerCase() == q.toLowerCase() ) { result = data[i]; break;}
}
}
$input.trigger("result", result && [result.data, result.value]);}
jQuery.each(trimWords($input.val()), function(i, value) { request(value, findValueCallback, findValueCallback);});}); hideResultsNow(); function selectCurrent() { var selected = select.selected(); if( !selected )
return false; var v = selected.result; previousValue = v; if ( options.multiple ) { var words = trimWords($input.val()); if ( words.length > 1 ) { v = words.slice(0, words.length - 1).join( options.multipleSeparator ) + options.multipleSeparator + v;}
v += options.multipleSeparator;}
$input.val(v); hideResultsNow(); $input.trigger("result", [selected.data, selected.value]); return true;}
function onChange(crap, skipPrevCheck) { if( lastKeyPressCode == KEY.DEL ) { select.hide(); return;}
var currentValue = $input.val(); if ( !skipPrevCheck && currentValue == previousValue )
return; previousValue = currentValue; currentValue = lastWord(currentValue); if ( currentValue.length >= options.minChars) { $input.addClass(options.loadingClass); if (!options.matchCase)
currentValue = currentValue.toLowerCase(); request(currentValue, receiveData, stopLoading);} else { stopLoading(); select.hide();}
}; function trimWords(value) { if ( !value ) { return [""];}
var words = value.split( jQuery.trim( options.multipleSeparator ) ); var result = []; jQuery.each(words, function(i, value) { if ( jQuery.trim(value) )
result[i] = jQuery.trim(value);}); return result;}
function lastWord(value) { if ( !options.multiple )
return value; var words = trimWords(value); return words[words.length - 1];}
function autoFill(q, sValue){ if( options.autoFill && (lastWord($input.val()).toLowerCase() == q.toLowerCase()) && lastKeyPressCode != 8 ) { $input.val($input.val() + sValue.substring(lastWord(previousValue).length)); jQuery.Autocompleter.Selection(input, previousValue.length, previousValue.length + sValue.length);}
}; function hideResults() { clearTimeout(timeout); timeout = setTimeout(hideResultsNow, 200);}; function hideResultsNow() { select.hide(); clearTimeout(timeout); stopLoading(); if (options.mustMatch) { if ($input.val() != previousValue) { }
}
}; function receiveData(q, data) { if ( data && data.length && hasFocus ) { stopLoading(); select.display(data, q); autoFill(q, data[0].value); select.show();} else { hideResultsNow();}
}; function request(term, success, failure) { if (!options.matchCase)
term = term.toLowerCase(); var data = cache.load(term); if (data && data.length) { success(term, data);} else if( (typeof options.url == "string") && (options.url.length > 0) ){ jQuery.ajax({ url: options.url, data: jQuery.extend({ q: lastWord(term), limit: options.max
}, options.extraParams), success: function(data) { var parsed = options.parse && options.parse(data) || parse(data); cache.add(term, parsed); success(term, parsed);}
});} else { failure(term);}
}
function parse(data) { var parsed = []; var rows = data.split("\n"); for (var i=0; i < rows.length; i++) { var row = jQuery.trim(rows[i]); if (row) { row = row.split("|"); parsed[parsed.length] = { data: row, value: row[0], result: options.formatResult && options.formatResult(row) || row[0]
};}
}
return parsed;}
function stopLoading() { $input.removeClass(options.loadingClass);}
}
jQuery.Autocompleter.defaults = { inputClass: "ac_input", resultsClass: "ac_results", loadingClass: "ac_loading", minChars: 1, delay: 400, matchCase: false, matchSubset: true, matchContains: false, cacheLength: 10, mustMatch: false, extraParams: {}, selectFirst: true, max: 10, autoFill: false, width: 0, multiple: false, multipleSeparator: ", "
}; jQuery.Autocompleter.Cache = function(options) { var data = {}; var length = 0; function matchSubset(s, sub) { if (!options.matchCase)
s = s.toLowerCase(); var i = s.indexOf(sub); if (i == -1) return false; return i == 0 || options.matchContains;}; function add(q, value) { if (length > options.cacheLength) { this.flush();}
if (!data[q]) { length++;}
data[q] = value;}
if( options.data ){ var stMatchSets = {}, nullData = 0; if( !options.url ) options.cacheLength = 1; stMatchSets[""] = []; jQuery.each(options.data, function(i, rawValue) { value = options.formatItem
? options.formatItem(rawValue, i+1, options.data.length)
: rawValue; var firstChar = value.charAt(0).toLowerCase(); if( !stMatchSets[firstChar] )
stMatchSets[firstChar] = []; var row = { value: value, data: rawValue, result: options.formatResult && options.formatResult(rawValue) || value
}
stMatchSets[firstChar].push(row); if ( nullData++ < options.max ) { stMatchSets[""].push(row);}
}); jQuery.each(stMatchSets, function(i, value) { options.cacheLength++; add(i, value);});}
return { flush: function() { data = {}; length = 0;}, add: add, load: function(q) { if (!options.cacheLength || !length)
return null; if (data[q])
return data[q]; if (options.matchSubset) { for (var i = q.length - 1; i >= options.minChars; i--) { var c = data[q.substr(0, i)]; if (c) { var csub = []; jQuery.each(c, function(i, x) { if (matchSubset(x.value, q)) { csub[csub.length] = x;}
}); return csub;}
}
}
return null;}
};}; jQuery.Autocompleter.Select = function (options, input, select) { var CLASSES = { ACTIVE: "ac_over"
}; var element = jQuery("<div>")
.hide()
.addClass(options.resultsClass)
.css("position", "absolute")
.appendTo("body"); var list = jQuery("<ul>").appendTo(element).mouseover( function(event) { active = jQuery("li", list).removeClass(CLASSES.ACTIVE).index(target(event)); jQuery(target(event)).addClass(CLASSES.ACTIVE);}).mouseout( function(event) { jQuery(target(event)).removeClass(CLASSES.ACTIVE);}).click(function(event) { jQuery(target(event)).addClass(CLASSES.ACTIVE); select(); input.focus(); return false;}); var listItems, active = -1, data, term = ""; if( options.width > 0 )
element.css("width", options.width); function target(event) { var element = event.target; while(element.tagName != "LI")
element = element.parentNode; return element;}
function moveSelect(step) { active += step; wrapSelection(); listItems.removeClass(CLASSES.ACTIVE).eq(active).addClass(CLASSES.ACTIVE);}; function wrapSelection() { if (active < 0) { active = listItems.size() - 1;} else if (active >= listItems.size()) { active = 0;}
}
function limitNumberOfItems(available) { return (options.max > 0) && (options.max < available)
? options.max
: available;}
function dataToDom() { var num = limitNumberOfItems(data.length); for (var i=0; i < num; i++) { if (!data[i])
continue; function highlight(value) { return value.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>");}
jQuery("<li>").html( options.formatItem
? highlight(options.formatItem(data[i].data, i+1, num))
: highlight(data[i].value) ).appendTo(list);}
listItems = list.find("li"); if ( options.selectFirst ) { listItems.eq(0).addClass(CLASSES.ACTIVE); active = 0;}
}
return { display: function(d, q) { data = d; term = q; list.empty(); dataToDom(); list.bgiframe();}, next: function() { moveSelect(1);}, prev: function() { moveSelect(-1);}, hide: function() { element.hide(); active = -1;}, visible : function() { return element.is(":visible");}, current: function() { return this.visible() && (listItems.filter("." + CLASSES.ACTIVE)[0] || options.selectFirst && listItems[0]);}, show: function() { var offset = jQuery(input).offset({scroll: false, border: false}); element.css({ width: options.width > 0 ? options.width : jQuery(input).width(), top: offset.top + input.offsetHeight, left: offset.left
}).show();}, selected: function() { return data && data[active];}
};}
jQuery.Autocompleter.Selection = function(field, start, end) { if( field.createTextRange ){ var selRange = field.createTextRange(); selRange.collapse(true); selRange.moveStart("character", start); selRange.moveEnd("character", end); selRange.select();} else if( field.setSelectionRange ){ field.setSelectionRange(start, end);} else { if( field.selectionStart ){ field.selectionStart = start; field.selectionEnd = end;}
}
field.focus();};