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