wp-includes/js/jquery/suggest.dev.js

   1 /*
   2  *      jquery.suggest 1.1b - 2007-08-06
   3  * Patched by Mark Jaquith with Alexander Dick's "multiple items" patch to allow for auto-suggesting of more than one tag before submitting
   4  * See: http://www.vulgarisoip.com/2007/06/29/jquerysuggest-an-alternative-jquery-based-autocomplete-library/#comment-7228
   5  *
   6  *      Uses code and techniques from following libraries:
   7  *      1. http://www.dyve.net/jquery/?autocomplete
   8  *      2. http://dev.jquery.com/browser/trunk/plugins/interface/iautocompleter.js
   9  *
  10  *      All the new stuff written by Peter Vulgaris (www.vulgarisoip.com)
  11  *      Feel free to do whatever you want with this file
  12  *
  13  */
  14
  15 (function($) {
  16
  17         $.suggest = function(input, options) {
  18                 var $input, $results, timeout, prevLength, cache, cacheSize;
  19
  20                 $input = $(input).attr("autocomplete", "off");
  21                 $results = $(document.createElement("ul"));
  22
  23                 timeout = false;                // hold timeout ID for suggestion results to appear
  24                 prevLength = 0;                 // last recorded length of $input.val()
  25                 cache = [];                             // cache MRU list
  26                 cacheSize = 0;                  // size of cache in chars (bytes?)
  27
  28                 $results.addClass(options.resultsClass).appendTo('body');
  29
  30
  31                 resetPosition();
  32                 $(window)
  33                         .load(resetPosition)            // just in case user is changing size of page while loading
  34                         .resize(resetPosition);
  35
  36                 $input.blur(function() {
  37                         setTimeout(function() { $results.hide() }, 200);
  38                 });
  39
  40
  41                 // help IE users if possible
  42                 if ( $.browser.msie ) {
  43                         try {
  44                                 $results.bgiframe();
  45                         } catch(e) { }
  46                 }
  47
  48                 // I really hate browser detection, but I don't see any other way
  49                 if ($.browser.mozilla)
  50                         $input.keypress(processKey);    // onkeypress repeats arrow keys in Mozilla/Opera
  51                 else
  52                         $input.keydown(processKey);             // onkeydown repeats arrow keys in IE/Safari
  53
  54
  55
  56
  57                 function resetPosition() {
  58                         // requires jquery.dimension plugin
  59                         var offset = $input.offset();
  60                         $results.css({
  61                                 top: (offset.top + input.offsetHeight) + 'px',
  62                                 left: offset.left + 'px'
  63                         });
  64                 }
  65
  66
  67                 function processKey(e) {
  68
  69                         // handling up/down/escape requires results to be visible
  70                         // handling enter/tab requires that AND a result to be selected
  71                         if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) ||
  72                                 (/^13$|^9$/.test(e.keyCode) && getCurrentResult())) {
  73
  74                                 if (e.preventDefault)
  75                                         e.preventDefault();
  76                                 if (e.stopPropagation)
  77                                         e.stopPropagation();
  78
  79                                 e.cancelBubble = true;
  80                                 e.returnValue = false;
  81
  82                                 switch(e.keyCode) {
  83
  84                                         case 38: // up
  85                                                 prevResult();
  86                                                 break;
  87
  88                                         case 40: // down
  89                                                 nextResult();
  90                                                 break;
  91
  92                                         case 9:  // tab
  93                                         case 13: // return
  94                                                 selectCurrentResult();
  95                                                 break;
  96
  97                                         case 27: //     escape
  98                                                 $results.hide();
  99                                                 break;
 100
 101                                 }
 102
 103                         } else if ($input.val().length != prevLength) {
 104
 105                                 if (timeout)
 106                                         clearTimeout(timeout);
 107                                 timeout = setTimeout(suggest, options.delay);
 108                                 prevLength = $input.val().length;
 109
 110                         }
 111
 112
 113                 }
 114
 115
 116                 function suggest() {
 117
 118                         var q = $.trim($input.val()), multipleSepPos, items;
 119
 120                         if ( options.multiple ) {
 121                                 multipleSepPos = q.lastIndexOf(options.multipleSep);
 122                                 if ( multipleSepPos != -1 ) {
 123                                         q = $.trim(q.substr(multipleSepPos + options.multipleSep.length));
 124                                 }
 125                         }
 126                         if (q.length >= options.minchars) {
 127
 128                                 cached = checkCache(q);
 129
 130                                 if (cached) {
 131
 132                                         displayItems(cached['items']);
 133
 134                                 } else {
 135
 136                                         $.get(options.source, {q: q}, function(txt) {
 137
 138                                                 $results.hide();
 139
 140                                                 items = parseTxt(txt, q);
 141
 142                                                 displayItems(items);
 143                                                 addToCache(q, items, txt.length);
 144
 145                                         });
 146
 147                                 }
 148
 149                         } else {
 150
 151                                 $results.hide();
 152
 153                         }
 154
 155                 }
 156
 157
 158                 function checkCache(q) {
 159                         var i;
 160                         for (i = 0; i < cache.length; i++)
 161                                 if (cache[i]['q'] == q) {
 162                                         cache.unshift(cache.splice(i, 1)[0]);
 163                                         return cache[0];
 164                                 }
 165
 166                         return false;
 167
 168                 }
 169
 170                 function addToCache(q, items, size) {
 171                         var cached;
 172                         while (cache.length && (cacheSize + size > options.maxCacheSize)) {
 173                                 cached = cache.pop();
 174                                 cacheSize -= cached['size'];
 175                         }
 176
 177                         cache.push({
 178                                 q: q,
 179                                 size: size,
 180                                 items: items
 181                                 });
 182
 183                         cacheSize += size;
 184
 185                 }
 186
 187                 function displayItems(items) {
 188                         var html = '', i;
 189                         if (!items)
 190                                 return;
 191
 192                         if (!items.length) {
 193                                 $results.hide();
 194                                 return;
 195                         }
 196
 197                         resetPosition(); // when the form moves after the page has loaded
 198
 199                         for (i = 0; i < items.length; i++)
 200                                 html += '<li>' + items[i] + '</li>';
 201
 202                         $results.html(html).show();
 203
 204                         $results
 205                                 .children('li')
 206                                 .mouseover(function() {
 207                                         $results.children('li').removeClass(options.selectClass);
 208                                         $(this).addClass(options.selectClass);
 209                                 })
 210                                 .click(function(e) {
 211                                         e.preventDefault();
 212                                         e.stopPropagation();
 213                                         selectCurrentResult();
 214                                 });
 215
 216                 }
 217
 218                 function parseTxt(txt, q) {
 219
 220                         var items = [], tokens = txt.split(options.delimiter), i, token;
 221
 222                         // parse returned data for non-empty items
 223                         for (i = 0; i < tokens.length; i++) {
 224                                 token = $.trim(tokens[i]);
 225                                 if (token) {
 226                                         token = token.replace(
 227                                                 new RegExp(q, 'ig'),
 228                                                 function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }
 229                                                 );
 230                                         items[items.length] = token;
 231                                 }
 232                         }
 233
 234                         return items;
 235                 }
 236
 237                 function getCurrentResult() {
 238                         var $currentResult;
 239                         if (!$results.is(':visible'))
 240                                 return false;
 241
 242                         $currentResult = $results.children('li.' + options.selectClass);
 243
 244                         if (!$currentResult.length)
 245                                 $currentResult = false;
 246
 247                         return $currentResult;
 248
 249                 }
 250
 251                 function selectCurrentResult() {
 252
 253                         $currentResult = getCurrentResult();
 254
 255                         if ($currentResult) {
 256                                 if ( options.multiple ) {
 257                                         if ( $input.val().indexOf(options.multipleSep) != -1 ) {
 258                                                 $currentVal = $input.val().substr( 0, ( $input.val().lastIndexOf(options.multipleSep) + options.multipleSep.length ) );
 259                                         } else {
 260                                                 $currentVal = "";
 261                                         }
 262                                         $input.val( $currentVal + $currentResult.text() + options.multipleSep);
 263                                         $input.focus();
 264                                 } else {
 265                                         $input.val($currentResult.text());
 266                                 }
 267                                 $results.hide();
 268
 269                                 if (options.onSelect)
 270                                         options.onSelect.apply($input[0]);
 271
 272                         }
 273
 274                 }
 275
 276                 function nextResult() {
 277
 278                         $currentResult = getCurrentResult();
 279
 280                         if ($currentResult)
 281                                 $currentResult
 282                                         .removeClass(options.selectClass)
 283                                         .next()
 284                                                 .addClass(options.selectClass);
 285                         else
 286                                 $results.children('li:first-child').addClass(options.selectClass);
 287
 288                 }
 289
 290                 function prevResult() {
 291                         var $currentResult = getCurrentResult();
 292
 293                         if ($currentResult)
 294                                 $currentResult
 295                                         .removeClass(options.selectClass)
 296                                         .prev()
 297                                                 .addClass(options.selectClass);
 298                         else
 299                                 $results.children('li:last-child').addClass(options.selectClass);
 300
 301                 }
 302         }
 303
 304         $.fn.suggest = function(source, options) {
 305
 306                 if (!source)
 307                         return;
 308
 309                 options = options || {};
 310                 options.multiple = options.multiple || false;
 311                 options.multipleSep = options.multipleSep || ", ";
 312                 options.source = source;
 313                 options.delay = options.delay || 100;
 314                 options.resultsClass = options.resultsClass || 'ac_results';
 315                 options.selectClass = options.selectClass || 'ac_over';
 316                 options.matchClass = options.matchClass || 'ac_match';
 317                 options.minchars = options.minchars || 2;
 318                 options.delimiter = options.delimiter || '\n';
 319                 options.onSelect = options.onSelect || false;
 320                 options.maxCacheSize = options.maxCacheSize || 65536;
 321
 322                 this.each(function() {
 323                         new $.suggest(this, options);
 324                 });
 325
 326                 return this;
 327
 328         };
 329
 330 })(jQuery);