source: trunk/www.guidonia.net/wp/wp-includes/js/jquery/suggest.dev.js@ 44

Last change on this file since 44 was 44, checked in by luciano, 15 years ago
File size: 7.1 KB
Line 
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 = 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);
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