| 1 | /* jQuery autocomplete Copyright Dylan Verheul <dylan@dyve.net> |
| 2 | * Licensed like jQuery, see http://docs.jquery.com/License |
| 3 | */ |
| 4 | |
| 5 | $.autocomplete = function(input, options) { |
| 6 | // Create a link to self |
| 7 | var me = this; |
| 8 | |
| 9 | // Create jQuery object for input element |
| 10 | var $input = $(input).attr("autocomplete", "off");; |
| 11 | |
| 12 | // Apply inputClass if necessary |
| 13 | if (options.inputClass) $input.addClass(options.inputClass); |
| 14 | |
| 15 | // Create results |
| 16 | var results = document.createElement("div"); |
| 17 | // Create jQuery object for results |
| 18 | var $results = $(results); |
| 19 | // Set default values for results |
| 20 | var pos = findPos(input); |
| 21 | $results.hide().addClass(options.resultsClass).css({ |
| 22 | position: "absolute", |
| 23 | top: (pos.y + input.offsetHeight) + "px", |
| 24 | left: pos.x + "px", |
| 25 | minWidth: $(input).width() |
| 26 | }); |
| 27 | // Add to body element |
| 28 | $(input).parent().append(results); |
| 29 | |
| 30 | input.autocompleter = me; |
| 31 | input.lastSelected = $input.val(); |
| 32 | |
| 33 | var timeout = null; |
| 34 | var prev = ""; |
| 35 | var active = -1; |
| 36 | var cache = {}; |
| 37 | var keyb = false; |
| 38 | |
| 39 | $input |
| 40 | .keydown(function(e) { |
| 41 | switch(e.keyCode) { |
| 42 | case 38: // up |
| 43 | e.preventDefault(); |
| 44 | moveSelect(-1); |
| 45 | break; |
| 46 | case 40: // down |
| 47 | e.preventDefault(); |
| 48 | moveSelect(1); |
| 49 | break; |
| 50 | case 9: // tab |
| 51 | case 13: // return |
| 52 | if (selectCurrent()) { |
| 53 | e.preventDefault(); |
| 54 | } |
| 55 | break; |
| 56 | default: |
| 57 | active = -1; |
| 58 | if (timeout) clearTimeout(timeout); |
| 59 | timeout = setTimeout(onChange, options.delay); |
| 60 | break; |
| 61 | } |
| 62 | }) |
| 63 | .blur(function() { |
| 64 | hideResults(); |
| 65 | }); |
| 66 | |
| 67 | hideResultsNow(); |
| 68 | |
| 69 | function onChange() { |
| 70 | var v = $input.val(); |
| 71 | if (v == prev) return; |
| 72 | prev = v; |
| 73 | if (v.length >= options.minChars) { |
| 74 | $input.addClass(options.loadingClass); |
| 75 | requestData(v); |
| 76 | } else { |
| 77 | $input.removeClass(options.loadingClass); |
| 78 | $results.hide(); |
| 79 | } |
| 80 | }; |
| 81 | |
| 82 | function moveSelect(step) { |
| 83 | |
| 84 | var lis = $("li", results); |
| 85 | if (!lis) return; |
| 86 | |
| 87 | active += step; |
| 88 | |
| 89 | if (active < 0) { |
| 90 | active = 0; |
| 91 | } else if (active >= lis.size()) { |
| 92 | active = lis.size() - 1; |
| 93 | } |
| 94 | |
| 95 | lis.removeClass("over"); |
| 96 | |
| 97 | $(lis[active]).addClass("over"); |
| 98 | |
| 99 | // Weird behaviour in IE |
| 100 | // if (lis[active] && lis[active].scrollIntoView) { |
| 101 | // lis[active].scrollIntoView(false); |
| 102 | // } |
| 103 | |
| 104 | }; |
| 105 | |
| 106 | function selectCurrent() { |
| 107 | var li = $("li.over", results)[0]; |
| 108 | if (!li) { |
| 109 | var $li = $("li", results); |
| 110 | if (options.selectOnly) { |
| 111 | if ($li.length == 1) li = $li[0]; |
| 112 | } else if (options.selectFirst) { |
| 113 | li = $li[0]; |
| 114 | } |
| 115 | } |
| 116 | if (li) { |
| 117 | selectItem(li); |
| 118 | return true; |
| 119 | } else { |
| 120 | return false; |
| 121 | } |
| 122 | }; |
| 123 | |
| 124 | function selectItem(li) { |
| 125 | if (!li) { |
| 126 | li = document.createElement("li"); |
| 127 | li.extra = []; |
| 128 | li.selectValue = ""; |
| 129 | } |
| 130 | var v = $.trim(li.selectValue ? li.selectValue : li.innerHTML); |
| 131 | input.lastSelected = v; |
| 132 | prev = v; |
| 133 | $results.html(""); |
| 134 | $input.val(v); |
| 135 | hideResultsNow(); |
| 136 | if (options.onItemSelect) setTimeout(function() { options.onItemSelect(li) }, 1); |
| 137 | }; |
| 138 | |
| 139 | function hideResults() { |
| 140 | if (timeout) clearTimeout(timeout); |
| 141 | timeout = setTimeout(hideResultsNow, 200); |
| 142 | }; |
| 143 | |
| 144 | function hideResultsNow() { |
| 145 | if (timeout) clearTimeout(timeout); |
| 146 | $input.removeClass(options.loadingClass); |
| 147 | if ($results.is(":visible")) { |
| 148 | $results.hide(); |
| 149 | } |
| 150 | if (options.mustMatch) { |
| 151 | var v = $input.val(); |
| 152 | if (v != input.lastSelected) { |
| 153 | selectItem(null); |
| 154 | } |
| 155 | } |
| 156 | }; |
| 157 | |
| 158 | function receiveData(q, data) { |
| 159 | if (data) { |
| 160 | $input.removeClass(options.loadingClass); |
| 161 | results.innerHTML = ""; |
| 162 | if ($.browser.msie) { |
| 163 | // we put a styled iframe behind the calendar so HTML SELECT elements don't show through |
| 164 | $results.append(document.createElement('iframe')); |
| 165 | } |
| 166 | var datasInDom = dataToDom(data); |
| 167 | results.appendChild(datasInDom); |
| 168 | $results.show(); |
| 169 | // set size of ul smaller (for borders) but almost as big as div |
| 170 | $(datasInDom).width($results.width()-2); |
| 171 | } else { |
| 172 | hideResultsNow(); |
| 173 | } |
| 174 | }; |
| 175 | |
| 176 | function parseData(data) { |
| 177 | if (!data) return null; |
| 178 | var parsed = []; |
| 179 | var rows = data.split(options.lineSeparator); |
| 180 | for (var i=0; i < rows.length; i++) { |
| 181 | var row = $.trim(rows[i]); |
| 182 | if (row) { |
| 183 | parsed[parsed.length] = row.split(options.cellSeparator); |
| 184 | } |
| 185 | } |
| 186 | return parsed; |
| 187 | }; |
| 188 | |
| 189 | function dataToDom(data) { |
| 190 | var ul = document.createElement("ul"); |
| 191 | var num = data.length; |
| 192 | for (var i=0; i < num; i++) { |
| 193 | var row = data[i]; |
| 194 | if (!row) continue; |
| 195 | var li = document.createElement("li"); |
| 196 | if (options.formatItem) { |
| 197 | li.innerHTML = options.formatItem(row, i, num); |
| 198 | li.selectValue = row[0]; |
| 199 | } else { |
| 200 | li.innerHTML = row[0]; |
| 201 | } |
| 202 | var extra = null; |
| 203 | if (row.length > 1) { |
| 204 | extra = []; |
| 205 | for (var j=1; j < row.length; j++) { |
| 206 | extra[extra.length] = row[j]; |
| 207 | } |
| 208 | } |
| 209 | li.extra = extra; |
| 210 | ul.appendChild(li); |
| 211 | $(li).hover( |
| 212 | function() { $("li", ul).removeClass("over"); $(this).addClass("over"); }, |
| 213 | function() { $(this).removeClass("over"); } |
| 214 | ).click(function(e) { e.preventDefault(); e.stopPropagation(); selectItem(this) }); |
| 215 | } |
| 216 | return ul; |
| 217 | }; |
| 218 | |
| 219 | function requestData(q) { |
| 220 | if (!options.matchCase) q = q.toLowerCase(); |
| 221 | var data = options.cacheLength ? loadFromCache(q) : null; |
| 222 | if (data) { |
| 223 | receiveData(q, data); |
| 224 | } else { |
| 225 | $.get(makeUrl(q), function(data) { |
| 226 | data = parseData(data) |
| 227 | addToCache(q, data); |
| 228 | receiveData(q, data); |
| 229 | }); |
| 230 | } |
| 231 | }; |
| 232 | |
| 233 | function makeUrl(q) { |
| 234 | var url = options.url + "?q=" + q; |
| 235 | for (var i in options.extraParams) { |
| 236 | url += "&" + i + "=" + options.extraParams[i]; |
| 237 | } |
| 238 | return url; |
| 239 | }; |
| 240 | |
| 241 | function loadFromCache(q) { |
| 242 | if (!q) return null; |
| 243 | if (cache[q]) return cache[q]; |
| 244 | if (options.matchSubset) { |
| 245 | for (var i = q.length - 1; i >= options.minChars; i--) { |
| 246 | var qs = q.substr(0, i); |
| 247 | var c = cache[qs]; |
| 248 | if (c) { |
| 249 | var csub = []; |
| 250 | for (var j = 0; j < c.length; j++) { |
| 251 | var x = c[j]; |
| 252 | var x0 = x[0]; |
| 253 | if (matchSubset(x0, q)) { |
| 254 | csub[csub.length] = x; |
| 255 | } |
| 256 | } |
| 257 | return csub; |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | return null; |
| 262 | }; |
| 263 | |
| 264 | function matchSubset(s, sub) { |
| 265 | if (!options.matchCase) s = s.toLowerCase(); |
| 266 | var i = s.indexOf(sub); |
| 267 | if (i == -1) return false; |
| 268 | return i == 0 || options.matchContains; |
| 269 | }; |
| 270 | |
| 271 | this.flushCache = function() { |
| 272 | cache = {}; |
| 273 | }; |
| 274 | |
| 275 | this.setExtraParams = function(p) { |
| 276 | options.extraParams = p; |
| 277 | }; |
| 278 | |
| 279 | function addToCache(q, data) { |
| 280 | if (!data || !q || !options.cacheLength) return; |
| 281 | if (!cache.length || cache.length > options.cacheLength) { |
| 282 | cache = {}; |
| 283 | cache.length = 1; // we know we're adding something |
| 284 | } else if (!cache[q]) { |
| 285 | cache.length++; |
| 286 | } |
| 287 | cache[q] = data; |
| 288 | }; |
| 289 | |
| 290 | function findPos(obj) { |
| 291 | var curleft = obj.offsetLeft || 0; |
| 292 | var curtop = obj.offsetTop || 0; |
| 293 | while (obj = obj.offsetParent) { |
| 294 | curleft += obj.offsetLeft |
| 295 | curtop += obj.offsetTop |
| 296 | } |
| 297 | return {x:curleft,y:curtop}; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | $.fn.autocomplete = function(url, options) { |
| 302 | // Make sure options exists |
| 303 | options = options || {}; |
| 304 | // Set url as option |
| 305 | options.url = url; |
| 306 | // Set default values for required options |
| 307 | options.inputClass = options.inputClass || "ac_input"; |
| 308 | options.resultsClass = options.resultsClass || "ac_results"; |
| 309 | options.lineSeparator = options.lineSeparator || "\n"; |
| 310 | options.cellSeparator = options.cellSeparator || "|"; |
| 311 | options.minChars = options.minChars || 1; |
| 312 | options.delay = options.delay || 400; |
| 313 | options.matchCase = options.matchCase || 0; |
| 314 | options.matchSubset = typeof(options.matchSubset) != 'undefined' ? options.matchSubset : 1; |
| 315 | options.matchContains = options.matchContains || 0; |
| 316 | options.cacheLength = options.cacheLength || 1; |
| 317 | options.mustMatch = options.mustMatch || 0; |
| 318 | options.extraParams = options.extraParams || {}; |
| 319 | options.loadingClass = options.loadingClass || "ac_loading"; |
| 320 | options.selectFirst = options.selectFirst || false; |
| 321 | options.selectOnly = options.selectOnly || false; |
| 322 | |
| 323 | this.each(function() { |
| 324 | var input = this; |
| 325 | new $.autocomplete(input, options); |
| 326 | }); |
| 327 | |
| 328 | // Don't break the chain |
| 329 | return this; |
| 330 | } |