redakcja/static/js/jquery.autocomplete.js

   1 /*
   2  * jQuery Autocomplete plugin 1.1
   3  *
   4  * Copyright (c) 2009 Jörn Zaefferer
   5  *
   6  * Dual licensed under the MIT and GPL licenses:
   7  *   http://www.opensource.org/licenses/mit-license.php
   8  *   http://www.gnu.org/licenses/gpl.html
   9  *
  10  * Revision: $Id: jquery.autocomplete.js 15 2009-08-22 10:30:27Z joern.zaefferer $
  11  */
  12
  13 ;(function($) {
  14
  15 $.fn.extend({
  16         autocomplete: function(urlOrData, options) {
  17                 var isUrl = typeof urlOrData == "string";
  18                 options = $.extend({}, $.Autocompleter.defaults, {
  19                         url: isUrl ? urlOrData : null,
  20                         data: isUrl ? null : urlOrData,
  21                         delay: isUrl ? $.Autocompleter.defaults.delay : 10,
  22                         max: options && !options.scroll ? 10 : 150
  23                 }, options);
  24
  25                 // if highlight is set to false, replace it with a do-nothing function
  26                 options.highlight = options.highlight || function(value) { return value; };
  27
  28                 // if the formatMatch option is not specified, then use formatItem for backwards compatibility
  29                 options.formatMatch = options.formatMatch || options.formatItem;
  30
  31                 return this.each(function() {
  32                         new $.Autocompleter(this, options);
  33                 });
  34         },
  35         result: function(handler) {
  36                 return this.bind("result", handler);
  37         },
  38         search: function(handler) {
  39                 return this.trigger("search", [handler]);
  40         },
  41         flushCache: function() {
  42                 return this.trigger("flushCache");
  43         },
  44         setOptions: function(options){
  45                 return this.trigger("setOptions", [options]);
  46         },
  47         unautocomplete: function() {
  48                 return this.trigger("unautocomplete");
  49         }
  50 });
  51
  52 $.Autocompleter = function(input, options) {
  53
  54         var KEY = {
  55                 UP: 38,
  56                 DOWN: 40,
  57                 DEL: 46,
  58                 TAB: 9,
  59                 RETURN: 13,
  60                 ESC: 27,
  61                 COMMA: 188,
  62                 PAGEUP: 33,
  63                 PAGEDOWN: 34,
  64                 BACKSPACE: 8
  65         };
  66
  67         // Create $ object for input element
  68         var $input = $(input).attr("autocomplete", "off").addClass(options.inputClass);
  69
  70         var timeout;
  71         var previousValue = "";
  72         var cache = $.Autocompleter.Cache(options);
  73         var hasFocus = 0;
  74         var lastKeyPressCode;
  75         var config = {
  76                 mouseDownOnSelect: false
  77         };
  78         var select = $.Autocompleter.Select(options, input, selectCurrent, config);
  79
  80         var blockSubmit;
  81
  82         // prevent form submit in opera when selecting with return key
  83         $.browser.opera && $(input.form).bind("submit.autocomplete", function() {
  84                 if (blockSubmit) {
  85                         blockSubmit = false;
  86                         return false;
  87                 }
  88         });
  89
  90         // only opera doesn't trigger keydown multiple times while pressed, others don't work with keypress at all
  91         $input.bind(($.browser.opera ? "keypress" : "keydown") + ".autocomplete", function(event) {
  92                 // a keypress means the input has focus
  93                 // avoids issue where input had focus before the autocomplete was applied
  94                 hasFocus = 1;
  95                 // track last key pressed
  96                 lastKeyPressCode = event.keyCode;
  97                 switch(event.keyCode) {
  98
  99                         case KEY.UP:
 100                                 event.preventDefault();
 101                                 if ( select.visible() ) {
 102                                         select.prev();
 103                                 } else {
 104                                         onChange(0, true);
 105                                 }
 106                                 break;
 107
 108                         case KEY.DOWN:
 109                                 event.preventDefault();
 110                                 if ( select.visible() ) {
 111                                         select.next();
 112                                 } else {
 113                                         onChange(0, true);
 114                                 }
 115                                 break;
 116
 117                         case KEY.PAGEUP:
 118                                 event.preventDefault();
 119                                 if ( select.visible() ) {
 120                                         select.pageUp();
 121                                 } else {
 122                                         onChange(0, true);
 123                                 }
 124                                 break;
 125
 126                         case KEY.PAGEDOWN:
 127                                 event.preventDefault();
 128                                 if ( select.visible() ) {
 129                                         select.pageDown();
 130                                 } else {
 131                                         onChange(0, true);
 132                                 }
 133                                 break;
 134
 135                         // matches also semicolon
 136                         case options.multiple && $.trim(options.multipleSeparator) == "," && KEY.COMMA:
 137                         case KEY.TAB:
 138                         case KEY.RETURN:
 139                                 if( selectCurrent() ) {
 140                                         // stop default to prevent a form submit, Opera needs special handling
 141                                         event.preventDefault();
 142                                         blockSubmit = true;
 143                                         return false;
 144                                 }
 145                                 break;
 146
 147                         case KEY.ESC:
 148                                 select.hide();
 149                                 break;
 150
 151                         default:
 152                                 clearTimeout(timeout);
 153                                 timeout = setTimeout(onChange, options.delay);
 154                                 break;
 155                 }
 156         }).focus(function(){
 157                 // track whether the field has focus, we shouldn't process any
 158                 // results if the field no longer has focus
 159                 hasFocus++;
 160         }).blur(function() {
 161                 hasFocus = 0;
 162                 if (!config.mouseDownOnSelect) {
 163                         hideResults();
 164                 }
 165         }).click(function() {
 166                 // show select when clicking in a focused field
 167                 if ( hasFocus++ > 1 && !select.visible() ) {
 168                         onChange(0, true);
 169                 }
 170         }).bind("search", function() {
 171                 // TODO why not just specifying both arguments?
 172                 var fn = (arguments.length > 1) ? arguments[1] : null;
 173                 function findValueCallback(q, data) {
 174                         var result;
 175                         if( data && data.length ) {
 176                                 for (var i=0; i < data.length; i++) {
 177                                         if( data[i].result.toLowerCase() == q.toLowerCase() ) {
 178                                                 result = data[i];
 179                                                 break;
 180                                         }
 181                                 }
 182                         }
 183                         if( typeof fn == "function" ) fn(result);
 184                         else $input.trigger("result", result && [result.data, result.value]);
 185                 }
 186                 $.each(trimWords($input.val()), function(i, value) {
 187                         request(value, findValueCallback, findValueCallback);
 188                 });
 189         }).bind("flushCache", function() {
 190                 cache.flush();
 191         }).bind("setOptions", function() {
 192                 $.extend(options, arguments[1]);
 193                 // if we've updated the data, repopulate
 194                 if ( "data" in arguments[1] )
 195                         cache.populate();
 196         }).bind("unautocomplete", function() {
 197                 select.unbind();
 198                 $input.unbind();
 199                 $(input.form).unbind(".autocomplete");
 200         });
 201
 202
 203         function selectCurrent() {
 204                 var selected = select.selected();
 205                 if( !selected )
 206                         return false;
 207
 208                 var v = selected.result;
 209                 previousValue = v;
 210
 211                 if ( options.multiple ) {
 212                         var words = trimWords($input.val());
 213                         if ( words.length > 1 ) {
 214                                 var seperator = options.multipleSeparator.length;
 215                                 var cursorAt = $(input).selection().start;
 216                                 var wordAt, progress = 0;
 217                                 $.each(words, function(i, word) {
 218                                         progress += word.length;
 219                                         if (cursorAt <= progress) {
 220                                                 wordAt = i;
 221                                                 return false;
 222                                         }
 223                                         progress += seperator;
 224                                 });
 225                                 words[wordAt] = v;
 226                                 // TODO this should set the cursor to the right position, but it gets overriden somewhere
 227                                 //$.Autocompleter.Selection(input, progress + seperator, progress + seperator);
 228                                 v = words.join( options.multipleSeparator );
 229                         }
 230                         v += options.multipleSeparator;
 231                 }
 232
 233                 $input.val(v);
 234                 hideResultsNow();
 235                 $input.trigger("result", [selected.data, selected.value]);
 236                 return true;
 237         }
 238
 239         function onChange(crap, skipPrevCheck) {
 240                 if( lastKeyPressCode == KEY.DEL ) {
 241                         select.hide();
 242                         return;
 243                 }
 244
 245                 var currentValue = $input.val();
 246
 247                 if ( !skipPrevCheck && currentValue == previousValue )
 248                         return;
 249
 250                 previousValue = currentValue;
 251
 252                 currentValue = lastWord(currentValue);
 253                 if ( currentValue.length >= options.minChars) {
 254                         $input.addClass(options.loadingClass);
 255                         if (!options.matchCase)
 256                                 currentValue = currentValue.toLowerCase();
 257                         request(currentValue, receiveData, hideResultsNow);
 258                 } else {
 259                         stopLoading();
 260                         select.hide();
 261                 }
 262         };
 263
 264         function trimWords(value) {
 265                 if (!value)
 266                         return [""];
 267                 if (!options.multiple)
 268                         return [$.trim(value)];
 269                 return $.map(value.split(options.multipleSeparator), function(word) {
 270                         return $.trim(value).length ? $.trim(word) : null;
 271                 });
 272         }
 273
 274         function lastWord(value) {
 275                 if ( !options.multiple )
 276                         return value;
 277                 var words = trimWords(value);
 278                 if (words.length == 1)
 279                         return words[0];
 280                 var cursorAt = $(input).selection().start;
 281                 if (cursorAt == value.length) {
 282                         words = trimWords(value)
 283                 } else {
 284                         words = trimWords(value.replace(value.substring(cursorAt), ""));
 285                 }
 286                 return words[words.length - 1];
 287         }
 288
 289         // fills in the input box w/the first match (assumed to be the best match)
 290         // q: the term entered
 291         // sValue: the first matching result
 292         function autoFill(q, sValue){
 293                 // autofill in the complete box w/the first match as long as the user hasn't entered in more data
 294                 // if the last user key pressed was backspace, don't autofill
 295                 if( options.autoFill && (lastWord($input.val()).toLowerCase() == q.toLowerCase()) && lastKeyPressCode != KEY.BACKSPACE ) {
 296                         // fill in the value (keep the case the user has typed)
 297                         $input.val($input.val() + sValue.substring(lastWord(previousValue).length));
 298                         // select the portion of the value not typed by the user (so the next character will erase)
 299                         $(input).selection(previousValue.length, previousValue.length + sValue.length);
 300                 }
 301         };
 302
 303         function hideResults() {
 304                 clearTimeout(timeout);
 305                 timeout = setTimeout(hideResultsNow, 200);
 306         };
 307
 308         function hideResultsNow() {
 309                 var wasVisible = select.visible();
 310                 select.hide();
 311                 clearTimeout(timeout);
 312                 stopLoading();
 313                 if (options.mustMatch) {
 314                         // call search and run callback
 315                         $input.search(
 316                                 function (result){
 317                                         // if no value found, clear the input box
 318                                         if( !result ) {
 319                                                 if (options.multiple) {
 320                                                         var words = trimWords($input.val()).slice(0, -1);
 321                                                         $input.val( words.join(options.multipleSeparator) + (words.length ? options.multipleSeparator : "") );
 322                                                 }
 323                                                 else {
 324                                                         $input.val( "" );
 325                                                         $input.trigger("result", null);
 326                                                 }
 327                                         }
 328                                 }
 329                         );
 330                 }
 331         };
 332
 333         function receiveData(q, data) {
 334                 if ( data && data.length && hasFocus ) {
 335                         stopLoading();
 336                         select.display(data, q);
 337                         autoFill(q, data[0].value);
 338                         select.show();
 339                 } else {
 340                         hideResultsNow();
 341                 }
 342         };
 343
 344         function request(term, success, failure) {
 345                 if (!options.matchCase)
 346                         term = term.toLowerCase();
 347                 var data = cache.load(term);
 348                 // recieve the cached data
 349                 if (data && data.length) {
 350                         success(term, data);
 351                 // if an AJAX url has been supplied, try loading the data now
 352                 } else if( (typeof options.url == "string") && (options.url.length > 0) ){
 353
 354                         var extraParams = {
 355                                 timestamp: +new Date()
 356                         };
 357                         $.each(options.extraParams, function(key, param) {
 358                                 extraParams[key] = typeof param == "function" ? param() : param;
 359                         });
 360
 361                         $.ajax({
 362                                 // try to leverage ajaxQueue plugin to abort previous requests
 363                                 mode: "abort",
 364                                 // limit abortion to this input
 365                                 port: "autocomplete" + input.name,
 366                                 dataType: options.dataType,
 367                                 url: options.url,
 368                                 data: $.extend({
 369                                         q: lastWord(term),
 370                                         limit: options.max
 371                                 }, extraParams),
 372                                 success: function(data) {
 373                                         var parsed = options.parse && options.parse(data) || parse(data);
 374                                         cache.add(term, parsed);
 375                                         success(term, parsed);
 376                                 }
 377                         });
 378                 } else {
 379                         // if we have a failure, we need to empty the list -- this prevents the the [TAB] key from selecting the last successful match
 380                         select.emptyList();
 381                         failure(term);
 382                 }
 383         };
 384
 385         function parse(data) {
 386                 var parsed = [];
 387                 var rows = data.split("\n");
 388                 for (var i=0; i < rows.length; i++) {
 389                         var row = $.trim(rows[i]);
 390                         if (row) {
 391                                 row = row.split("|");
 392                                 parsed[parsed.length] = {
 393                                         data: row,
 394                                         value: row[0],
 395                                         result: options.formatResult && options.formatResult(row, row[0]) || row[0]
 396                                 };
 397                         }
 398                 }
 399                 return parsed;
 400         };
 401
 402         function stopLoading() {
 403                 $input.removeClass(options.loadingClass);
 404         };
 405
 406 };
 407
 408 $.Autocompleter.defaults = {
 409         inputClass: "ac_input",
 410         resultsClass: "ac_results",
 411         loadingClass: "ac_loading",
 412         minChars: 1,
 413         delay: 400,
 414         matchCase: false,
 415         matchSubset: true,
 416         matchContains: false,
 417         cacheLength: 10,
 418         max: 100,
 419         mustMatch: false,
 420         extraParams: {},
 421         selectFirst: true,
 422         formatItem: function(row) { return row[0]; },
 423         formatMatch: null,
 424         autoFill: false,
 425         width: 0,
 426         multiple: false,
 427         multipleSeparator: ", ",
 428         highlight: function(value, term) {
 429                 return value.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + term.replace(/([\^\$\(\)\[\]\{\}\*\.\+\?\|\\])/gi, "\\$1") + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>");
 430         },
 431     scroll: true,
 432     scrollHeight: 180
 433 };
 434
 435 $.Autocompleter.Cache = function(options) {
 436
 437         var data = {};
 438         var length = 0;
 439
 440         function matchSubset(s, sub) {
 441                 if (!options.matchCase)
 442                         s = s.toLowerCase();
 443                 var i = s.indexOf(sub);
 444                 if (options.matchContains == "word"){
 445                         i = s.toLowerCase().search("\\b" + sub.toLowerCase());
 446                 }
 447                 if (i == -1) return false;
 448                 return i == 0 || options.matchContains;
 449         };
 450
 451         function add(q, value) {
 452                 if (length > options.cacheLength){
 453                         flush();
 454                 }
 455                 if (!data[q]){
 456                         length++;
 457                 }
 458                 data[q] = value;
 459         }
 460
 461         function populate(){
 462                 if( !options.data ) return false;
 463                 // track the matches
 464                 var stMatchSets = {},
 465                         nullData = 0;
 466
 467                 // no url was specified, we need to adjust the cache length to make sure it fits the local data store
 468                 if( !options.url ) options.cacheLength = 1;
 469
 470                 // track all options for minChars = 0
 471                 stMatchSets[""] = [];
 472
 473                 // loop through the array and create a lookup structure
 474                 for ( var i = 0, ol = options.data.length; i < ol; i++ ) {
 475                         var rawValue = options.data[i];
 476                         // if rawValue is a string, make an array otherwise just reference the array
 477                         rawValue = (typeof rawValue == "string") ? [rawValue] : rawValue;
 478
 479                         var value = options.formatMatch(rawValue, i+1, options.data.length);
 480                         if ( value === false )
 481                                 continue;
 482
 483                         var firstChar = value.charAt(0).toLowerCase();
 484                         // if no lookup array for this character exists, look it up now
 485                         if( !stMatchSets[firstChar] )
 486                                 stMatchSets[firstChar] = [];
 487
 488                         // if the match is a string
 489                         var row = {
 490                                 value: value,
 491                                 data: rawValue,
 492                                 result: options.formatResult && options.formatResult(rawValue) || value
 493                         };
 494
 495                         // push the current match into the set list
 496                         stMatchSets[firstChar].push(row);
 497
 498                         // keep track of minChars zero items
 499                         if ( nullData++ < options.max ) {
 500                                 stMatchSets[""].push(row);
 501                         }
 502                 };
 503
 504                 // add the data items to the cache
 505                 $.each(stMatchSets, function(i, value) {
 506                         // increase the cache size
 507                         options.cacheLength++;
 508                         // add to the cache
 509                         add(i, value);
 510                 });
 511         }
 512
 513         // populate any existing data
 514         setTimeout(populate, 25);
 515
 516         function flush(){
 517                 data = {};
 518                 length = 0;
 519         }
 520
 521         return {
 522                 flush: flush,
 523                 add: add,
 524                 populate: populate,
 525                 load: function(q) {
 526                         if (!options.cacheLength || !length)
 527                                 return null;
 528                         /*
 529                          * if dealing w/local data and matchContains than we must make sure
 530                          * to loop through all the data collections looking for matches
 531                          */
 532                         if( !options.url && options.matchContains ){
 533                                 // track all matches
 534                                 var csub = [];
 535                                 // loop through all the data grids for matches
 536                                 for( var k in data ){
 537                                         // don't search through the stMatchSets[""] (minChars: 0) cache
 538                                         // this prevents duplicates
 539                                         if( k.length > 0 ){
 540                                                 var c = data[k];
 541                                                 $.each(c, function(i, x) {
 542                                                         // if we've got a match, add it to the array
 543                                                         if (matchSubset(x.value, q)) {
 544                                                                 csub.push(x);
 545                                                         }
 546                                                 });
 547                                         }
 548                                 }
 549                                 return csub;
 550                         } else
 551                         // if the exact item exists, use it
 552                         if (data[q]){
 553                                 return data[q];
 554                         } else
 555                         if (options.matchSubset) {
 556                                 for (var i = q.length - 1; i >= options.minChars; i--) {
 557                                         var c = data[q.substr(0, i)];
 558                                         if (c) {
 559                                                 var csub = [];
 560                                                 $.each(c, function(i, x) {
 561                                                         if (matchSubset(x.value, q)) {
 562                                                                 csub[csub.length] = x;
 563                                                         }
 564                                                 });
 565                                                 return csub;
 566                                         }
 567                                 }
 568                         }
 569                         return null;
 570                 }
 571         };
 572 };
 573
 574 $.Autocompleter.Select = function (options, input, select, config) {
 575         var CLASSES = {
 576                 ACTIVE: "ac_over"
 577         };
 578
 579         var listItems,
 580                 active = -1,
 581                 data,
 582                 term = "",
 583                 needsInit = true,
 584                 element,
 585                 list;
 586
 587         // Create results
 588         function init() {
 589                 if (!needsInit)
 590                         return;
 591                 element = $("<div/>")
 592                 .hide()
 593                 .addClass(options.resultsClass)
 594                 .css("position", "absolute")
 595                 .appendTo(document.body);
 596
 597                 list = $("<ul/>").appendTo(element).mouseover( function(event) {
 598                         if(target(event).nodeName && target(event).nodeName.toUpperCase() == 'LI') {
 599                     active = $("li", list).removeClass(CLASSES.ACTIVE).index(target(event));
 600                             $(target(event)).addClass(CLASSES.ACTIVE);
 601                 }
 602                 }).click(function(event) {
 603                         $(target(event)).addClass(CLASSES.ACTIVE);
 604                         select();
 605                         // TODO provide option to avoid setting focus again after selection? useful for cleanup-on-focus
 606                         input.focus();
 607                         return false;
 608                 }).mousedown(function() {
 609                         config.mouseDownOnSelect = true;
 610                 }).mouseup(function() {
 611                         config.mouseDownOnSelect = false;
 612                 });
 613
 614                 if( options.width > 0 )
 615                         element.css("width", options.width);
 616
 617                 needsInit = false;
 618         }
 619
 620         function target(event) {
 621                 var element = event.target;
 622                 while(element && element.tagName != "LI")
 623                         element = element.parentNode;
 624                 // more fun with IE, sometimes event.target is empty, just ignore it then
 625                 if(!element)
 626                         return [];
 627                 return element;
 628         }
 629
 630         function moveSelect(step) {
 631                 listItems.slice(active, active + 1).removeClass(CLASSES.ACTIVE);
 632                 movePosition(step);
 633         var activeItem = listItems.slice(active, active + 1).addClass(CLASSES.ACTIVE);
 634         if(options.scroll) {
 635             var offset = 0;
 636             listItems.slice(0, active).each(function() {
 637                                 offset += this.offsetHeight;
 638                         });
 639             if((offset + activeItem[0].offsetHeight - list.scrollTop()) > list[0].clientHeight) {
 640                 list.scrollTop(offset + activeItem[0].offsetHeight - list.innerHeight());
 641             } else if(offset < list.scrollTop()) {
 642                 list.scrollTop(offset);
 643             }
 644         }
 645         };
 646
 647         function movePosition(step) {
 648                 active += step;
 649                 if (active < 0) {
 650                         active = listItems.size() - 1;
 651                 } else if (active >= listItems.size()) {
 652                         active = 0;
 653                 }
 654         }
 655
 656         function limitNumberOfItems(available) {
 657                 return options.max && options.max < available
 658                         ? options.max
 659                         : available;
 660         }
 661
 662         function fillList() {
 663                 list.empty();
 664                 var max = limitNumberOfItems(data.length);
 665                 for (var i=0; i < max; i++) {
 666                         if (!data[i])
 667                                 continue;
 668                         var formatted = options.formatItem(data[i].data, i+1, max, data[i].value, term);
 669                         if ( formatted === false )
 670                                 continue;
 671                         var li = $("<li/>").html( options.highlight(formatted, term) ).addClass(i%2 == 0 ? "ac_even" : "ac_odd").appendTo(list)[0];
 672                         $.data(li, "ac_data", data[i]);
 673                 }
 674                 listItems = list.find("li");
 675                 if ( options.selectFirst ) {
 676                         listItems.slice(0, 1).addClass(CLASSES.ACTIVE);
 677                         active = 0;
 678                 }
 679                 // apply bgiframe if available
 680                 if ( $.fn.bgiframe )
 681                         list.bgiframe();
 682         }
 683
 684         return {
 685                 display: function(d, q) {
 686                         init();
 687                         data = d;
 688                         term = q;
 689                         fillList();
 690                 },
 691                 next: function() {
 692                         moveSelect(1);
 693                 },
 694                 prev: function() {
 695                         moveSelect(-1);
 696                 },
 697                 pageUp: function() {
 698                         if (active != 0 && active - 8 < 0) {
 699                                 moveSelect( -active );
 700                         } else {
 701                                 moveSelect(-8);
 702                         }
 703                 },
 704                 pageDown: function() {
 705                         if (active != listItems.size() - 1 && active + 8 > listItems.size()) {
 706                                 moveSelect( listItems.size() - 1 - active );
 707                         } else {
 708                                 moveSelect(8);
 709                         }
 710                 },
 711                 hide: function() {
 712                         element && element.hide();
 713                         listItems && listItems.removeClass(CLASSES.ACTIVE);
 714                         active = -1;
 715                 },
 716                 visible : function() {
 717                         return element && element.is(":visible");
 718                 },
 719                 current: function() {
 720                         return this.visible() && (listItems.filter("." + CLASSES.ACTIVE)[0] || options.selectFirst && listItems[0]);
 721                 },
 722                 show: function() {
 723                         var offset = $(input).offset();
 724                         element.css({
 725                                 width: typeof options.width == "string" || options.width > 0 ? options.width : $(input).width(),
 726                                 top: offset.top + input.offsetHeight,
 727                                 left: offset.left
 728                         }).show();
 729             if(options.scroll) {
 730                 list.scrollTop(0);
 731                 list.css({
 732                                         maxHeight: options.scrollHeight,
 733                                         overflow: 'auto'
 734                                 });
 735
 736                 if($.browser.msie && typeof document.body.style.maxHeight === "undefined") {
 737                                         var listHeight = 0;
 738                                         listItems.each(function() {
 739                                                 listHeight += this.offsetHeight;
 740                                         });
 741                                         var scrollbarsVisible = listHeight > options.scrollHeight;
 742                     list.css('height', scrollbarsVisible ? options.scrollHeight : listHeight );
 743                                         if (!scrollbarsVisible) {
 744                                                 // IE doesn't recalculate width when scrollbar disappears
 745                                                 listItems.width( list.width() - parseInt(listItems.css("padding-left")) - parseInt(listItems.css("padding-right")) );
 746                                         }
 747                 }
 748
 749             }
 750                 },
 751                 selected: function() {
 752                         var selected = listItems && listItems.filter("." + CLASSES.ACTIVE).removeClass(CLASSES.ACTIVE);
 753                         return selected && selected.length && $.data(selected[0], "ac_data");
 754                 },
 755                 emptyList: function (){
 756                         list && list.empty();
 757                 },
 758                 unbind: function() {
 759                         element && element.remove();
 760                 }
 761         };
 762 };
 763
 764 $.fn.selection = function(start, end) {
 765         if (start !== undefined) {
 766                 return this.each(function() {
 767                         if( this.createTextRange ){
 768                                 var selRange = this.createTextRange();
 769                                 if (end === undefined || start == end) {
 770                                         selRange.move("character", start);
 771                                         selRange.select();
 772                                 } else {
 773                                         selRange.collapse(true);
 774                                         selRange.moveStart("character", start);
 775                                         selRange.moveEnd("character", end);
 776                                         selRange.select();
 777                                 }
 778                         } else if( this.setSelectionRange ){
 779                                 this.setSelectionRange(start, end);
 780                         } else if( this.selectionStart ){
 781                                 this.selectionStart = start;
 782                                 this.selectionEnd = end;
 783                         }
 784                 });
 785         }
 786         var field = this[0];
 787         if ( field.createTextRange ) {
 788                 var range = document.selection.createRange(),
 789                         orig = field.value,
 790                         teststring = "<->",
 791                         textLength = range.text.length;
 792                 range.text = teststring;
 793                 var caretAt = field.value.indexOf(teststring);
 794                 field.value = orig;
 795                 this.selection(caretAt, caretAt + textLength);
 796                 return {
 797                         start: caretAt,
 798                         end: caretAt + textLength
 799                 }
 800         } else if( field.selectionStart !== undefined ){
 801                 return {
 802                         start: field.selectionStart,
 803                         end: field.selectionEnd
 804                 }
 805         }
 806 };
 807
 808 })(jQuery);