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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", |
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25 | minWidth: $(input).width() |
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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 | } |
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166 | var datasInDom = dataToDom(data); |
167 | results.appendChild(datasInDom); |
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168 | $results.show(); |
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169 | // set size of ul smaller (for borders) but almost as big as div |
170 | $(datasInDom).width($results.width()-2); |
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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 | } |