1 /* Prototype JavaScript framework, version 1.5.0
2 * (c) 2005-2007 Sam Stephenson
4 * Prototype is freely distributable under the terms of an MIT-style license.
5 * For details, see the Prototype web site: http://prototype.conio.net/
7 /*--------------------------------------------------------------------------*/
12 XPath: !!document.evaluate
15 ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
16 emptyFunction: function() {},
17 K: function(x) { return x }
23 this.initialize.apply(this, arguments);
28 var Abstract = new Object();
30 Object.extend = function(destination, source) {
31 for (var property in source) {
32 destination[property] = source[property];
37 Object.extend(Object, {
38 inspect: function(object) {
40 if (object === undefined) return 'undefined';
41 if (object === null) return 'null';
42 return object.inspect ? object.inspect() : object.toString();
44 if (e instanceof RangeError) return '...';
49 keys: function(object) {
51 for (var property in object)
56 values: function(object) {
58 for (var property in object)
59 values.push(object[property]);
63 clone: function(object) {
64 return Object.extend({}, object);
68 Function.prototype.bind = function() {
69 var __method = this, args = $A(arguments), object = args.shift();
71 return __method.apply(object, args.concat($A(arguments)));
75 Function.prototype.bindAsEventListener = function(object) {
76 var __method = this, args = $A(arguments), object = args.shift();
77 return function(event) {
78 return __method.apply(object, [( event || window.event)].concat(args).concat($A(arguments)));
82 Object.extend(Number.prototype, {
83 toColorPart: function() {
84 var digits = this.toString(16);
85 if (this < 16) return '0' + digits;
93 times: function(iterator) {
94 $R(0, this, true).each(iterator);
103 for (var i = 0, length = arguments.length; i < length; i++) {
104 var lambda = arguments[i];
106 returnValue = lambda();
115 /*--------------------------------------------------------------------------*/
117 var PeriodicalExecuter = Class.create();
118 PeriodicalExecuter.prototype = {
119 initialize: function(callback, frequency) {
120 this.callback = callback;
121 this.frequency = frequency;
122 this.currentlyExecuting = false;
124 this.registerCallback();
127 registerCallback: function() {
128 this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
132 if (!this.timer) return;
133 clearInterval(this.timer);
137 onTimerEvent: function() {
138 if (!this.currentlyExecuting) {
140 this.currentlyExecuting = true;
143 this.currentlyExecuting = false;
148 String.interpret = function(value){
149 return value == null ? '' : String(value);
152 Object.extend(String.prototype, {
153 gsub: function(pattern, replacement) {
154 var result = '', source = this, match;
155 replacement = arguments.callee.prepareReplacement(replacement);
157 while (source.length > 0) {
158 if (match = source.match(pattern)) {
159 result += source.slice(0, match.index);
160 result += String.interpret(replacement(match));
161 source = source.slice(match.index + match[0].length);
163 result += source, source = '';
169 sub: function(pattern, replacement, count) {
170 replacement = this.gsub.prepareReplacement(replacement);
171 count = count === undefined ? 1 : count;
173 return this.gsub(pattern, function(match) {
174 if (--count < 0) return match[0];
175 return replacement(match);
179 scan: function(pattern, iterator) {
180 this.gsub(pattern, iterator);
184 truncate: function(length, truncation) {
185 length = length || 30;
186 truncation = truncation === undefined ? '...' : truncation;
187 return this.length > length ?
188 this.slice(0, length - truncation.length) + truncation : this;
192 return this.replace(/^\s+/, '').replace(/\s+$/, '');
195 stripTags: function() {
196 return this.replace(/<\/?[^>]+>/gi, '');
199 stripScripts: function() {
200 return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
203 extractScripts: function() {
204 var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
205 var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
206 return (this.match(matchAll) || []).map(function(scriptTag) {
207 return (scriptTag.match(matchOne) || ['', ''])[1];
211 evalScripts: function() {
212 return this.extractScripts().map(function(script) { return eval(script) });
215 escapeHTML: function() {
216 var div = document.createElement('div');
217 var text = document.createTextNode(this);
218 div.appendChild(text);
219 return div.innerHTML;
222 unescapeHTML: function() {
223 var div = document.createElement('div');
224 div.innerHTML = this.stripTags();
225 return div.childNodes[0] ? (div.childNodes.length > 1 ?
226 $A(div.childNodes).inject('',function(memo,node){ return memo+node.nodeValue }) :
227 div.childNodes[0].nodeValue) : '';
230 toQueryParams: function(separator) {
231 var match = this.strip().match(/([^?#]*)(#.*)?$/);
232 if (!match) return {};
234 return match[1].split(separator || '&').inject({}, function(hash, pair) {
235 if ((pair = pair.split('='))[0]) {
236 var name = decodeURIComponent(pair[0]);
237 var value = pair[1] ? decodeURIComponent(pair[1]) : undefined;
239 if (hash[name] !== undefined) {
240 if (hash[name].constructor != Array)
241 hash[name] = [hash[name]];
242 if (value) hash[name].push(value);
244 else hash[name] = value;
250 toArray: function() {
251 return this.split('');
255 return this.slice(0, this.length - 1) +
256 String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
259 camelize: function() {
260 var parts = this.split('-'), len = parts.length;
261 if (len == 1) return parts[0];
263 var camelized = this.charAt(0) == '-'
264 ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
267 for (var i = 1; i < len; i++)
268 camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
273 capitalize: function(){
274 return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
277 underscore: function() {
278 return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
281 dasherize: function() {
282 return this.gsub(/_/,'-');
285 inspect: function(useDoubleQuotes) {
286 var escapedString = this.replace(/\\/g, '\\\\');
288 return '"' + escapedString.replace(/"/g, '\\"') + '"';
290 return "'" + escapedString.replace(/'/g, '\\\'') + "'";
294 String.prototype.gsub.prepareReplacement = function(replacement) {
295 if (typeof replacement == 'function') return replacement;
296 var template = new Template(replacement);
297 return function(match) { return template.evaluate(match) };
300 String.prototype.parseQuery = String.prototype.toQueryParams;
302 var Template = Class.create();
303 Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
304 Template.prototype = {
305 initialize: function(template, pattern) {
306 this.template = template.toString();
307 this.pattern = pattern || Template.Pattern;
310 evaluate: function(object) {
311 return this.template.gsub(this.pattern, function(match) {
312 var before = match[1];
313 if (before == '\\') return match[2];
314 return before + String.interpret(object[match[3]]);
319 var $break = new Object();
320 var $continue = new Object();
323 each: function(iterator) {
326 this._each(function(value) {
328 iterator(value, index++);
330 if (e != $continue) throw e;
334 if (e != $break) throw e;
339 eachSlice: function(number, iterator) {
340 var index = -number, slices = [], array = this.toArray();
341 while ((index += number) < array.length)
342 slices.push(array.slice(index, index+number));
343 return slices.map(iterator);
346 all: function(iterator) {
348 this.each(function(value, index) {
349 result = result && !!(iterator || Prototype.K)(value, index);
350 if (!result) throw $break;
355 any: function(iterator) {
357 this.each(function(value, index) {
358 if (result = !!(iterator || Prototype.K)(value, index))
364 collect: function(iterator) {
366 this.each(function(value, index) {
367 results.push((iterator || Prototype.K)(value, index));
372 detect: function(iterator) {
374 this.each(function(value, index) {
375 if (iterator(value, index)) {
383 findAll: function(iterator) {
385 this.each(function(value, index) {
386 if (iterator(value, index))
392 grep: function(pattern, iterator) {
394 this.each(function(value, index) {
395 var stringValue = value.toString();
396 if (stringValue.match(pattern))
397 results.push((iterator || Prototype.K)(value, index));
402 include: function(object) {
404 this.each(function(value) {
405 if (value == object) {
413 inGroupsOf: function(number, fillWith) {
414 fillWith = fillWith === undefined ? null : fillWith;
415 return this.eachSlice(number, function(slice) {
416 while(slice.length < number) slice.push(fillWith);
421 inject: function(memo, iterator) {
422 this.each(function(value, index) {
423 memo = iterator(memo, value, index);
428 invoke: function(method) {
429 var args = $A(arguments).slice(1);
430 return this.map(function(value) {
431 return value[method].apply(value, args);
435 max: function(iterator) {
437 this.each(function(value, index) {
438 value = (iterator || Prototype.K)(value, index);
439 if (result == undefined || value >= result)
445 min: function(iterator) {
447 this.each(function(value, index) {
448 value = (iterator || Prototype.K)(value, index);
449 if (result == undefined || value < result)
455 partition: function(iterator) {
456 var trues = [], falses = [];
457 this.each(function(value, index) {
458 ((iterator || Prototype.K)(value, index) ?
459 trues : falses).push(value);
461 return [trues, falses];
464 pluck: function(property) {
466 this.each(function(value, index) {
467 results.push(value[property]);
472 reject: function(iterator) {
474 this.each(function(value, index) {
475 if (!iterator(value, index))
481 sortBy: function(iterator) {
482 return this.map(function(value, index) {
483 return {value: value, criteria: iterator(value, index)};
484 }).sort(function(left, right) {
485 var a = left.criteria, b = right.criteria;
486 return a < b ? -1 : a > b ? 1 : 0;
490 toArray: function() {
495 var iterator = Prototype.K, args = $A(arguments);
496 if (typeof args.last() == 'function')
497 iterator = args.pop();
499 var collections = [this].concat(args).map($A);
500 return this.map(function(value, index) {
501 return iterator(collections.pluck(index));
506 return this.toArray().length;
509 inspect: function() {
510 return '#<Enumerable:' + this.toArray().inspect() + '>';
514 Object.extend(Enumerable, {
515 map: Enumerable.collect,
516 find: Enumerable.detect,
517 select: Enumerable.findAll,
518 member: Enumerable.include,
519 entries: Enumerable.toArray
521 var $A = Array.from = function(iterable) {
522 if (!iterable) return [];
523 if (iterable.toArray) {
524 return iterable.toArray();
527 for (var i = 0, length = iterable.length; i < length; i++)
528 results.push(iterable[i]);
533 Object.extend(Array.prototype, Enumerable);
535 if (!Array.prototype._reverse)
536 Array.prototype._reverse = Array.prototype.reverse;
538 Object.extend(Array.prototype, {
539 _each: function(iterator) {
540 for (var i = 0, length = this.length; i < length; i++)
554 return this[this.length - 1];
557 compact: function() {
558 return this.select(function(value) {
559 return value != null;
563 flatten: function() {
564 return this.inject([], function(array, value) {
565 return array.concat(value && value.constructor == Array ?
566 value.flatten() : [value]);
570 without: function() {
571 var values = $A(arguments);
572 return this.select(function(value) {
573 return !values.include(value);
577 indexOf: function(object) {
578 for (var i = 0, length = this.length; i < length; i++)
579 if (this[i] == object) return i;
583 reverse: function(inline) {
584 return (inline !== false ? this : this.toArray())._reverse();
588 return this.length > 1 ? this : this[0];
592 return this.inject([], function(array, value) {
593 return array.include(value) ? array : array.concat([value]);
598 return [].concat(this);
605 inspect: function() {
606 return '[' + this.map(Object.inspect).join(', ') + ']';
610 Array.prototype.toArray = Array.prototype.clone;
613 string = string.strip();
614 return string ? string.split(/\s+/) : [];
618 Array.prototype.concat = function(){
620 for(var i = 0, length = this.length; i < length; i++) array.push(this[i]);
621 for(var i = 0, length = arguments.length; i < length; i++) {
622 if(arguments[i].constructor == Array) {
623 for(var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
624 array.push(arguments[i][j]);
626 array.push(arguments[i]);
632 var Hash = function(obj) {
633 Object.extend(this, obj || {});
636 Object.extend(Hash, {
637 toQueryString: function(obj) {
640 this.prototype._each.call(obj, function(pair) {
641 if (!pair.key) return;
643 if (pair.value && pair.value.constructor == Array) {
644 var values = pair.value.compact();
645 if (values.length < 2) pair.value = values.reduce();
647 key = encodeURIComponent(pair.key);
648 values.each(function(value) {
649 value = value != undefined ? encodeURIComponent(value) : '';
650 parts.push(key + '=' + encodeURIComponent(value));
655 if (pair.value == undefined) pair[1] = '';
656 parts.push(pair.map(encodeURIComponent).join('='));
659 return parts.join('&');
663 Object.extend(Hash.prototype, Enumerable);
664 Object.extend(Hash.prototype, {
665 _each: function(iterator) {
666 for (var key in this) {
667 var value = this[key];
668 if (value && value == Hash.prototype[key]) continue;
670 var pair = [key, value];
678 return this.pluck('key');
682 return this.pluck('value');
685 merge: function(hash) {
686 return $H(hash).inject(this, function(mergedHash, pair) {
687 mergedHash[pair.key] = pair.value;
694 for(var i = 0, length = arguments.length; i < length; i++) {
695 var value = this[arguments[i]];
696 if (value !== undefined){
697 if (result === undefined) result = value;
699 if (result.constructor != Array) result = [result];
703 delete this[arguments[i]];
708 toQueryString: function() {
709 return Hash.toQueryString(this);
712 inspect: function() {
713 return '#<Hash:{' + this.map(function(pair) {
714 return pair.map(Object.inspect).join(': ');
715 }).join(', ') + '}>';
719 function $H(object) {
720 if (object && object.constructor == Hash) return object;
721 return new Hash(object);
723 ObjectRange = Class.create();
724 Object.extend(ObjectRange.prototype, Enumerable);
725 Object.extend(ObjectRange.prototype, {
726 initialize: function(start, end, exclusive) {
729 this.exclusive = exclusive;
732 _each: function(iterator) {
733 var value = this.start;
734 while (this.include(value)) {
736 value = value.succ();
740 include: function(value) {
741 if (value < this.start)
744 return value < this.end;
745 return value <= this.end;
749 var $R = function(start, end, exclusive) {
750 return new ObjectRange(start, end, exclusive);
754 getTransport: function() {
756 function() {return new XMLHttpRequest()},
757 function() {return new ActiveXObject('Msxml2.XMLHTTP')},
758 function() {return new ActiveXObject('Microsoft.XMLHTTP')}
762 activeRequestCount: 0
768 _each: function(iterator) {
769 this.responders._each(iterator);
772 register: function(responder) {
773 if (!this.include(responder))
774 this.responders.push(responder);
777 unregister: function(responder) {
778 this.responders = this.responders.without(responder);
781 dispatch: function(callback, request, transport, json) {
782 this.each(function(responder) {
783 if (typeof responder[callback] == 'function') {
785 responder[callback].apply(responder, [request, transport, json]);
792 Object.extend(Ajax.Responders, Enumerable);
794 Ajax.Responders.register({
795 onCreate: function() {
796 Ajax.activeRequestCount++;
798 onComplete: function() {
799 Ajax.activeRequestCount--;
803 Ajax.Base = function() {};
804 Ajax.Base.prototype = {
805 setOptions: function(options) {
809 contentType: 'application/x-www-form-urlencoded',
813 Object.extend(this.options, options || {});
815 this.options.method = this.options.method.toLowerCase();
816 if (typeof this.options.parameters == 'string')
817 this.options.parameters = this.options.parameters.toQueryParams();
821 Ajax.Request = Class.create();
822 Ajax.Request.Events =
823 ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
825 Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
828 initialize: function(url, options) {
829 this.transport = Ajax.getTransport();
830 this.setOptions(options);
834 request: function(url) {
836 this.method = this.options.method;
837 var params = this.options.parameters;
839 if (!['get', 'post'].include(this.method)) {
840 // simulate other verbs over post
841 params['_method'] = this.method;
842 this.method = 'post';
845 params = Hash.toQueryString(params);
846 if (params && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) params += '&_='
848 // when GET, append parameters to URL
849 if (this.method == 'get' && params)
850 this.url += (this.url.indexOf('?') > -1 ? '&' : '?') + params;
853 Ajax.Responders.dispatch('onCreate', this, this.transport);
855 this.transport.open(this.method.toUpperCase(), this.url,
856 this.options.asynchronous);
858 if (this.options.asynchronous)
859 setTimeout(function() { this.respondToReadyState(1) }.bind(this), 10);
861 this.transport.onreadystatechange = this.onStateChange.bind(this);
862 this.setRequestHeaders();
864 var body = this.method == 'post' ? (this.options.postBody || params) : null;
866 this.transport.send(body);
868 /* Force Firefox to handle ready state 4 for synchronous requests */
869 if (!this.options.asynchronous && this.transport.overrideMimeType)
870 this.onStateChange();
874 this.dispatchException(e);
878 onStateChange: function() {
879 var readyState = this.transport.readyState;
880 if (readyState > 1 && !((readyState == 4) && this._complete))
881 this.respondToReadyState(this.transport.readyState);
884 setRequestHeaders: function() {
886 'X-Requested-With': 'XMLHttpRequest',
887 'X-Prototype-Version': Prototype.Version,
888 'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
891 if (this.method == 'post') {
892 headers['Content-type'] = this.options.contentType +
893 (this.options.encoding ? '; charset=' + this.options.encoding : '');
895 /* Force "Connection: close" for older Mozilla browsers to work
896 * around a bug where XMLHttpRequest sends an incorrect
897 * Content-length header. See Mozilla Bugzilla #246651.
899 if (this.transport.overrideMimeType &&
900 (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
901 headers['Connection'] = 'close';
904 // user-defined headers
905 if (typeof this.options.requestHeaders == 'object') {
906 var extras = this.options.requestHeaders;
908 if (typeof extras.push == 'function')
909 for (var i = 0, length = extras.length; i < length; i += 2)
910 headers[extras[i]] = extras[i+1];
912 $H(extras).each(function(pair) { headers[pair.key] = pair.value });
915 for (var name in headers)
916 this.transport.setRequestHeader(name, headers[name]);
919 success: function() {
920 return !this.transport.status
921 || (this.transport.status >= 200 && this.transport.status < 300);
924 respondToReadyState: function(readyState) {
925 var state = Ajax.Request.Events[readyState];
926 var transport = this.transport, json = this.evalJSON();
928 if (state == 'Complete') {
930 this._complete = true;
931 (this.options['on' + this.transport.status]
932 || this.options['on' + (this.success() ? 'Success' : 'Failure')]
933 || Prototype.emptyFunction)(transport, json);
935 this.dispatchException(e);
938 if ((this.getHeader('Content-type') || 'text/javascript').strip().
939 match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))
944 (this.options['on' + state] || Prototype.emptyFunction)(transport, json);
945 Ajax.Responders.dispatch('on' + state, this, transport, json);
947 this.dispatchException(e);
950 if (state == 'Complete') {
951 // avoid memory leak in MSIE: clean up
952 this.transport.onreadystatechange = Prototype.emptyFunction;
956 getHeader: function(name) {
958 return this.transport.getResponseHeader(name);
959 } catch (e) { return null }
962 evalJSON: function() {
964 var json = this.getHeader('X-JSON');
965 return json ? eval('(' + json + ')') : null;
966 } catch (e) { return null }
969 evalResponse: function() {
971 return eval(this.transport.responseText);
973 this.dispatchException(e);
977 dispatchException: function(exception) {
978 (this.options.onException || Prototype.emptyFunction)(this, exception);
979 Ajax.Responders.dispatch('onException', this, exception);
983 Ajax.Updater = Class.create();
985 Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
986 initialize: function(container, url, options) {
988 success: (container.success || container),
989 failure: (container.failure || (container.success ? null : container))
992 this.transport = Ajax.getTransport();
993 this.setOptions(options);
995 var onComplete = this.options.onComplete || Prototype.emptyFunction;
996 this.options.onComplete = (function(transport, param) {
997 this.updateContent();
998 onComplete(transport, param);
1004 updateContent: function() {
1005 var receiver = this.container[this.success() ? 'success' : 'failure'];
1006 var response = this.transport.responseText;
1008 if (!this.options.evalScripts) response = response.stripScripts();
1010 if (receiver = $(receiver)) {
1011 if (this.options.insertion)
1012 new this.options.insertion(receiver, response);
1014 receiver.update(response);
1017 if (this.success()) {
1018 if (this.onComplete)
1019 setTimeout(this.onComplete.bind(this), 10);
1024 Ajax.PeriodicalUpdater = Class.create();
1025 Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
1026 initialize: function(container, url, options) {
1027 this.setOptions(options);
1028 this.onComplete = this.options.onComplete;
1030 this.frequency = (this.options.frequency || 2);
1031 this.decay = (this.options.decay || 1);
1034 this.container = container;
1041 this.options.onComplete = this.updateComplete.bind(this);
1042 this.onTimerEvent();
1046 this.updater.options.onComplete = undefined;
1047 clearTimeout(this.timer);
1048 (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
1051 updateComplete: function(request) {
1052 if (this.options.decay) {
1053 this.decay = (request.responseText == this.lastText ?
1054 this.decay * this.options.decay : 1);
1056 this.lastText = request.responseText;
1058 this.timer = setTimeout(this.onTimerEvent.bind(this),
1059 this.decay * this.frequency * 1000);
1062 onTimerEvent: function() {
1063 this.updater = new Ajax.Updater(this.container, this.url, this.options);
1066 function $(element) {
1067 if (arguments.length > 1) {
1068 for (var i = 0, elements = [], length = arguments.length; i < length; i++)
1069 elements.push($(arguments[i]));
1072 if (typeof element == 'string')
1073 element = document.getElementById(element);
1074 return Element.extend(element);
1077 if (Prototype.BrowserFeatures.XPath) {
1078 document._getElementsByXPath = function(expression, parentElement) {
1080 var query = document.evaluate(expression, $(parentElement) || document,
1081 null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
1082 for (var i = 0, length = query.snapshotLength; i < length; i++)
1083 results.push(query.snapshotItem(i));
1088 document.getElementsByClassName = function(className, parentElement) {
1089 if (Prototype.BrowserFeatures.XPath) {
1090 var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
1091 return document._getElementsByXPath(q, parentElement);
1093 var children = ($(parentElement) || document.body).getElementsByTagName('*');
1094 var elements = [], child;
1095 for (var i = 0, length = children.length; i < length; i++) {
1096 child = children[i];
1097 if (Element.hasClassName(child, className))
1098 elements.push(Element.extend(child));
1104 /*--------------------------------------------------------------------------*/
1106 if (!window.Element)
1107 var Element = new Object();
1109 Element.extend = function(element) {
1110 if (!element || _nativeExtensions || element.nodeType == 3) return element;
1112 if (!element._extended && element.tagName && element != window) {
1113 var methods = Object.clone(Element.Methods), cache = Element.extend.cache;
1115 if (element.tagName == 'FORM')
1116 Object.extend(methods, Form.Methods);
1117 if (['INPUT', 'TEXTAREA', 'SELECT'].include(element.tagName))
1118 Object.extend(methods, Form.Element.Methods);
1120 Object.extend(methods, Element.Methods.Simulated);
1122 for (var property in methods) {
1123 var value = methods[property];
1124 if (typeof value == 'function' && !(property in element))
1125 element[property] = cache.findOrStore(value);
1129 element._extended = true;
1133 Element.extend.cache = {
1134 findOrStore: function(value) {
1135 return this[value] = this[value] || function() {
1136 return value.apply(null, [this].concat($A(arguments)));
1142 visible: function(element) {
1143 return $(element).style.display != 'none';
1146 toggle: function(element) {
1147 element = $(element);
1148 Element[Element.visible(element) ? 'hide' : 'show'](element);
1152 hide: function(element) {
1153 $(element).style.display = 'none';
1157 show: function(element) {
1158 $(element).style.display = '';
1162 remove: function(element) {
1163 element = $(element);
1164 element.parentNode.removeChild(element);
1168 update: function(element, html) {
1169 html = typeof html == 'undefined' ? '' : html.toString();
1170 $(element).innerHTML = html.stripScripts();
1171 setTimeout(function() {html.evalScripts()}, 10);
1175 replace: function(element, html) {
1176 element = $(element);
1177 html = typeof html == 'undefined' ? '' : html.toString();
1178 if (element.outerHTML) {
1179 element.outerHTML = html.stripScripts();
1181 var range = element.ownerDocument.createRange();
1182 range.selectNodeContents(element);
1183 element.parentNode.replaceChild(
1184 range.createContextualFragment(html.stripScripts()), element);
1186 setTimeout(function() {html.evalScripts()}, 10);
1190 inspect: function(element) {
1191 element = $(element);
1192 var result = '<' + element.tagName.toLowerCase();
1193 $H({'id': 'id', 'className': 'class'}).each(function(pair) {
1194 var property = pair.first(), attribute = pair.last();
1195 var value = (element[property] || '').toString();
1196 if (value) result += ' ' + attribute + '=' + value.inspect(true);
1198 return result + '>';
1201 recursivelyCollect: function(element, property) {
1202 element = $(element);
1204 while (element = element[property])
1205 if (element.nodeType == 1)
1206 elements.push(Element.extend(element));
1210 ancestors: function(element) {
1211 return $(element).recursivelyCollect('parentNode');
1214 descendants: function(element) {
1215 return $A($(element).getElementsByTagName('*'));
1218 immediateDescendants: function(element) {
1219 if (!(element = $(element).firstChild)) return [];
1220 while (element && element.nodeType != 1) element = element.nextSibling;
1221 if (element) return [element].concat($(element).nextSiblings());
1225 previousSiblings: function(element) {
1226 return $(element).recursivelyCollect('previousSibling');
1229 nextSiblings: function(element) {
1230 return $(element).recursivelyCollect('nextSibling');
1233 siblings: function(element) {
1234 element = $(element);
1235 return element.previousSiblings().reverse().concat(element.nextSiblings());
1238 match: function(element, selector) {
1239 if (typeof selector == 'string')
1240 selector = new Selector(selector);
1241 return selector.match($(element));
1244 up: function(element, expression, index) {
1245 return Selector.findElement($(element).ancestors(), expression, index);
1248 down: function(element, expression, index) {
1249 return Selector.findElement($(element).descendants(), expression, index);
1252 previous: function(element, expression, index) {
1253 return Selector.findElement($(element).previousSiblings(), expression, index);
1256 next: function(element, expression, index) {
1257 return Selector.findElement($(element).nextSiblings(), expression, index);
1260 getElementsBySelector: function() {
1261 var args = $A(arguments), element = $(args.shift());
1262 return Selector.findChildElements(element, args);
1265 getElementsByClassName: function(element, className) {
1266 return document.getElementsByClassName(className, element);
1269 readAttribute: function(element, name) {
1270 element = $(element);
1271 if (document.all && !window.opera) {
1272 var t = Element._attributeTranslations;
1273 if (t.values[name]) return t.values[name](element, name);
1274 if (t.names[name]) name = t.names[name];
1275 var attribute = element.attributes[name];
1276 if(attribute) return attribute.nodeValue;
1278 return element.getAttribute(name);
1281 getHeight: function(element) {
1282 return $(element).getDimensions().height;
1285 getWidth: function(element) {
1286 return $(element).getDimensions().width;
1289 classNames: function(element) {
1290 return new Element.ClassNames(element);
1293 hasClassName: function(element, className) {
1294 if (!(element = $(element))) return;
1295 var elementClassName = element.className;
1296 if (elementClassName.length == 0) return false;
1297 if (elementClassName == className ||
1298 elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
1303 addClassName: function(element, className) {
1304 if (!(element = $(element))) return;
1305 Element.classNames(element).add(className);
1309 removeClassName: function(element, className) {
1310 if (!(element = $(element))) return;
1311 Element.classNames(element).remove(className);
1315 toggleClassName: function(element, className) {
1316 if (!(element = $(element))) return;
1317 Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](className);
1321 observe: function() {
1322 Event.observe.apply(Event, arguments);
1323 return $A(arguments).first();
1326 stopObserving: function() {
1327 Event.stopObserving.apply(Event, arguments);
1328 return $A(arguments).first();
1331 // removes whitespace-only text node children
1332 cleanWhitespace: function(element) {
1333 element = $(element);
1334 var node = element.firstChild;
1336 var nextNode = node.nextSibling;
1337 if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
1338 element.removeChild(node);
1344 empty: function(element) {
1345 return $(element).innerHTML.match(/^\s*$/);
1348 descendantOf: function(element, ancestor) {
1349 element = $(element), ancestor = $(ancestor);
1350 while (element = element.parentNode)
1351 if (element == ancestor) return true;
1355 scrollTo: function(element) {
1356 element = $(element);
1357 var pos = Position.cumulativeOffset(element);
1358 window.scrollTo(pos[0], pos[1]);
1362 getStyle: function(element, style) {
1363 element = $(element);
1364 if (['float','cssFloat'].include(style))
1365 style = (typeof element.style.styleFloat != 'undefined' ? 'styleFloat' : 'cssFloat');
1366 style = style.camelize();
1367 var value = element.style[style];
1369 if (document.defaultView && document.defaultView.getComputedStyle) {
1370 var css = document.defaultView.getComputedStyle(element, null);
1371 value = css ? css[style] : null;
1372 } else if (element.currentStyle) {
1373 value = element.currentStyle[style];
1377 if((value == 'auto') && ['width','height'].include(style) && (element.getStyle('display') != 'none'))
1378 value = element['offset'+style.capitalize()] + 'px';
1380 if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
1381 if (Element.getStyle(element, 'position') == 'static') value = 'auto';
1382 if(style == 'opacity') {
1383 if(value) return parseFloat(value);
1384 if(value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
1385 if(value[1]) return parseFloat(value[1]) / 100;
1388 return value == 'auto' ? null : value;
1391 setStyle: function(element, style) {
1392 element = $(element);
1393 for (var name in style) {
1394 var value = style[name];
1395 if(name == 'opacity') {
1397 value = (/Gecko/.test(navigator.userAgent) &&
1398 !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ? 0.999999 : 1.0;
1399 if(/MSIE/.test(navigator.userAgent) && !window.opera)
1400 element.style.filter = element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'');
1401 } else if(value == '') {
1402 if(/MSIE/.test(navigator.userAgent) && !window.opera)
1403 element.style.filter = element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'');
1405 if(value < 0.00001) value = 0;
1406 if(/MSIE/.test(navigator.userAgent) && !window.opera)
1407 element.style.filter = element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'') +
1408 'alpha(opacity='+value*100+')';
1410 } else if(['float','cssFloat'].include(name)) name = (typeof element.style.styleFloat != 'undefined') ? 'styleFloat' : 'cssFloat';
1411 element.style[name.camelize()] = value;
1416 getDimensions: function(element) {
1417 element = $(element);
1418 var display = $(element).getStyle('display');
1419 if (display != 'none' && display != null) // Safari bug
1420 return {width: element.offsetWidth, height: element.offsetHeight};
1422 // All *Width and *Height properties give 0 on elements with display none,
1423 // so enable the element temporarily
1424 var els = element.style;
1425 var originalVisibility = els.visibility;
1426 var originalPosition = els.position;
1427 var originalDisplay = els.display;
1428 els.visibility = 'hidden';
1429 els.position = 'absolute';
1430 els.display = 'block';
1431 var originalWidth = element.clientWidth;
1432 var originalHeight = element.clientHeight;
1433 els.display = originalDisplay;
1434 els.position = originalPosition;
1435 els.visibility = originalVisibility;
1436 return {width: originalWidth, height: originalHeight};
1439 makePositioned: function(element) {
1440 element = $(element);
1441 var pos = Element.getStyle(element, 'position');
1442 if (pos == 'static' || !pos) {
1443 element._madePositioned = true;
1444 element.style.position = 'relative';
1445 // Opera returns the offset relative to the positioning context, when an
1446 // element is position relative but top and left have not been defined
1448 element.style.top = 0;
1449 element.style.left = 0;
1455 undoPositioned: function(element) {
1456 element = $(element);
1457 if (element._madePositioned) {
1458 element._madePositioned = undefined;
1459 element.style.position =
1461 element.style.left =
1462 element.style.bottom =
1463 element.style.right = '';
1468 makeClipping: function(element) {
1469 element = $(element);
1470 if (element._overflow) return element;
1471 element._overflow = element.style.overflow || 'auto';
1472 if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
1473 element.style.overflow = 'hidden';
1477 undoClipping: function(element) {
1478 element = $(element);
1479 if (!element._overflow) return element;
1480 element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
1481 element._overflow = null;
1486 Object.extend(Element.Methods, {childOf: Element.Methods.descendantOf});
1488 Element._attributeTranslations = {};
1490 Element._attributeTranslations.names = {
1494 datetime: "dateTime",
1495 accesskey: "accessKey",
1496 tabindex: "tabIndex",
1498 maxlength: "maxLength",
1499 readonly: "readOnly",
1500 longdesc: "longDesc"
1503 Element._attributeTranslations.values = {
1504 _getAttr: function(element, attribute) {
1505 return element.getAttribute(attribute, 2);
1508 _flag: function(element, attribute) {
1509 return $(element).hasAttribute(attribute) ? attribute : null;
1512 style: function(element) {
1513 return element.style.cssText.toLowerCase();
1516 title: function(element) {
1517 var node = element.getAttributeNode('title');
1518 return node.specified ? node.nodeValue : null;
1522 Object.extend(Element._attributeTranslations.values, {
1523 href: Element._attributeTranslations.values._getAttr,
1524 src: Element._attributeTranslations.values._getAttr,
1525 disabled: Element._attributeTranslations.values._flag,
1526 checked: Element._attributeTranslations.values._flag,
1527 readonly: Element._attributeTranslations.values._flag,
1528 multiple: Element._attributeTranslations.values._flag
1531 Element.Methods.Simulated = {
1532 hasAttribute: function(element, attribute) {
1533 var t = Element._attributeTranslations;
1534 attribute = t.names[attribute] || attribute;
1535 return $(element).getAttributeNode(attribute).specified;
1539 // IE is missing .innerHTML support for TABLE-related elements
1540 if (document.all && !window.opera){
1541 Element.Methods.update = function(element, html) {
1542 element = $(element);
1543 html = typeof html == 'undefined' ? '' : html.toString();
1544 var tagName = element.tagName.toUpperCase();
1545 if (['THEAD','TBODY','TR','TD'].include(tagName)) {
1546 var div = document.createElement('div');
1550 div.innerHTML = '<table><tbody>' + html.stripScripts() + '</tbody></table>';
1554 div.innerHTML = '<table><tbody><tr>' + html.stripScripts() + '</tr></tbody></table>';
1558 div.innerHTML = '<table><tbody><tr><td>' + html.stripScripts() + '</td></tr></tbody></table>';
1561 $A(element.childNodes).each(function(node){
1562 element.removeChild(node)
1564 depth.times(function(){ div = div.firstChild });
1566 $A(div.childNodes).each(
1567 function(node){ element.appendChild(node) });
1569 element.innerHTML = html.stripScripts();
1571 setTimeout(function() {html.evalScripts()}, 10);
1576 Object.extend(Element, Element.Methods);
1578 var _nativeExtensions = false;
1580 if(/Konqueror|Safari|KHTML/.test(navigator.userAgent))
1581 ['', 'Form', 'Input', 'TextArea', 'Select'].each(function(tag) {
1582 var className = 'HTML' + tag + 'Element';
1583 if(window[className]) return;
1584 var klass = window[className] = {};
1585 klass.prototype = document.createElement(tag ? tag.toLowerCase() : 'div').__proto__;
1588 Element.addMethods = function(methods) {
1589 Object.extend(Element.Methods, methods || {});
1591 function copy(methods, destination, onlyIfAbsent) {
1592 onlyIfAbsent = onlyIfAbsent || false;
1593 var cache = Element.extend.cache;
1594 for (var property in methods) {
1595 var value = methods[property];
1596 if (!onlyIfAbsent || !(property in destination))
1597 destination[property] = cache.findOrStore(value);
1601 if (typeof HTMLElement != 'undefined') {
1602 copy(Element.Methods, HTMLElement.prototype);
1603 copy(Element.Methods.Simulated, HTMLElement.prototype, true);
1604 copy(Form.Methods, HTMLFormElement.prototype);
1605 [HTMLInputElement, HTMLTextAreaElement, HTMLSelectElement].each(function(klass) {
1606 copy(Form.Element.Methods, klass.prototype);
1608 _nativeExtensions = true;
1612 var Toggle = new Object();
1613 Toggle.display = Element.toggle;
1615 /*--------------------------------------------------------------------------*/
1617 Abstract.Insertion = function(adjacency) {
1618 this.adjacency = adjacency;
1621 Abstract.Insertion.prototype = {
1622 initialize: function(element, content) {
1623 this.element = $(element);
1624 this.content = content.stripScripts();
1626 if (this.adjacency && this.element.insertAdjacentHTML) {
1628 this.element.insertAdjacentHTML(this.adjacency, this.content);
1630 var tagName = this.element.tagName.toUpperCase();
1631 if (['TBODY', 'TR'].include(tagName)) {
1632 this.insertContent(this.contentFromAnonymousTable());
1638 this.range = this.element.ownerDocument.createRange();
1639 if (this.initializeRange) this.initializeRange();
1640 this.insertContent([this.range.createContextualFragment(this.content)]);
1643 setTimeout(function() {content.evalScripts()}, 10);
1646 contentFromAnonymousTable: function() {
1647 var div = document.createElement('div');
1648 div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
1649 return $A(div.childNodes[0].childNodes[0].childNodes);
1653 var Insertion = new Object();
1655 Insertion.Before = Class.create();
1656 Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
1657 initializeRange: function() {
1658 this.range.setStartBefore(this.element);
1661 insertContent: function(fragments) {
1662 fragments.each((function(fragment) {
1663 this.element.parentNode.insertBefore(fragment, this.element);
1668 Insertion.Top = Class.create();
1669 Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
1670 initializeRange: function() {
1671 this.range.selectNodeContents(this.element);
1672 this.range.collapse(true);
1675 insertContent: function(fragments) {
1676 fragments.reverse(false).each((function(fragment) {
1677 this.element.insertBefore(fragment, this.element.firstChild);
1682 Insertion.Bottom = Class.create();
1683 Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
1684 initializeRange: function() {
1685 this.range.selectNodeContents(this.element);
1686 this.range.collapse(this.element);
1689 insertContent: function(fragments) {
1690 fragments.each((function(fragment) {
1691 this.element.appendChild(fragment);
1696 Insertion.After = Class.create();
1697 Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
1698 initializeRange: function() {
1699 this.range.setStartAfter(this.element);
1702 insertContent: function(fragments) {
1703 fragments.each((function(fragment) {
1704 this.element.parentNode.insertBefore(fragment,
1705 this.element.nextSibling);
1710 /*--------------------------------------------------------------------------*/
1712 Element.ClassNames = Class.create();
1713 Element.ClassNames.prototype = {
1714 initialize: function(element) {
1715 this.element = $(element);
1718 _each: function(iterator) {
1719 this.element.className.split(/\s+/).select(function(name) {
1720 return name.length > 0;
1724 set: function(className) {
1725 this.element.className = className;
1728 add: function(classNameToAdd) {
1729 if (this.include(classNameToAdd)) return;
1730 this.set($A(this).concat(classNameToAdd).join(' '));
1733 remove: function(classNameToRemove) {
1734 if (!this.include(classNameToRemove)) return;
1735 this.set($A(this).without(classNameToRemove).join(' '));
1738 toString: function() {
1739 return $A(this).join(' ');
1743 Object.extend(Element.ClassNames.prototype, Enumerable);
1744 var Selector = Class.create();
1745 Selector.prototype = {
1746 initialize: function(expression) {
1747 this.params = {classNames: []};
1748 this.expression = expression.toString().strip();
1749 this.parseExpression();
1750 this.compileMatcher();
1753 parseExpression: function() {
1754 function abort(message) { throw 'Parse error in selector: ' + message; }
1756 if (this.expression == '') abort('empty expression');
1758 var params = this.params, expr = this.expression, match, modifier, clause, rest;
1759 while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
1760 params.attributes = params.attributes || [];
1761 params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''});
1765 if (expr == '*') return this.params.wildcard = true;
1767 while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) {
1768 modifier = match[1], clause = match[2], rest = match[3];
1770 case '#': params.id = clause; break;
1771 case '.': params.classNames.push(clause); break;
1773 case undefined: params.tagName = clause.toUpperCase(); break;
1774 default: abort(expr.inspect());
1779 if (expr.length > 0) abort(expr.inspect());
1782 buildMatchExpression: function() {
1783 var params = this.params, conditions = [], clause;
1785 if (params.wildcard)
1786 conditions.push('true');
1787 if (clause = params.id)
1788 conditions.push('element.readAttribute("id") == ' + clause.inspect());
1789 if (clause = params.tagName)
1790 conditions.push('element.tagName.toUpperCase() == ' + clause.inspect());
1791 if ((clause = params.classNames).length > 0)
1792 for (var i = 0, length = clause.length; i < length; i++)
1793 conditions.push('element.hasClassName(' + clause[i].inspect() + ')');
1794 if (clause = params.attributes) {
1795 clause.each(function(attribute) {
1796 var value = 'element.readAttribute(' + attribute.name.inspect() + ')';
1797 var splitValueBy = function(delimiter) {
1798 return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';
1801 switch (attribute.operator) {
1802 case '=': conditions.push(value + ' == ' + attribute.value.inspect()); break;
1803 case '~=': conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break;
1804 case '|=': conditions.push(
1805 splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect()
1807 case '!=': conditions.push(value + ' != ' + attribute.value.inspect()); break;
1809 case undefined: conditions.push('element.hasAttribute(' + attribute.name.inspect() + ')'); break;
1810 default: throw 'Unknown operator ' + attribute.operator + ' in selector';
1815 return conditions.join(' && ');
1818 compileMatcher: function() {
1819 this.match = new Function('element', 'if (!element.tagName) return false; \
1820 element = $(element); \
1821 return ' + this.buildMatchExpression());
1824 findElements: function(scope) {
1827 if (element = $(this.params.id))
1828 if (this.match(element))
1829 if (!scope || Element.childOf(element, scope))
1832 scope = (scope || document).getElementsByTagName(this.params.tagName || '*');
1835 for (var i = 0, length = scope.length; i < length; i++)
1836 if (this.match(element = scope[i]))
1837 results.push(Element.extend(element));
1842 toString: function() {
1843 return this.expression;
1847 Object.extend(Selector, {
1848 matchElements: function(elements, expression) {
1849 var selector = new Selector(expression);
1850 return elements.select(selector.match.bind(selector)).map(Element.extend);
1853 findElement: function(elements, expression, index) {
1854 if (typeof expression == 'number') index = expression, expression = false;
1855 return Selector.matchElements(elements, expression || '*')[index || 0];
1858 findChildElements: function(element, expressions) {
1859 return expressions.map(function(expression) {
1860 return expression.match(/[^\s"]+(?:"[^"]*"[^\s"]+)*/g).inject([null], function(results, expr) {
1861 var selector = new Selector(expr);
1862 return results.inject([], function(elements, result) {
1863 return elements.concat(selector.findElements(result || element));
1871 return Selector.findChildElements(document, $A(arguments));
1874 reset: function(form) {
1879 serializeElements: function(elements, getHash) {
1880 var data = elements.inject({}, function(result, element) {
1881 if (!element.disabled && element.name) {
1882 var key = element.name, value = $(element).getValue();
1883 if (value != undefined) {
1885 if (result[key].constructor != Array) result[key] = [result[key]];
1886 result[key].push(value);
1888 else result[key] = value;
1894 return getHash ? data : Hash.toQueryString(data);
1899 serialize: function(form, getHash) {
1900 return Form.serializeElements(Form.getElements(form), getHash);
1903 getElements: function(form) {
1904 return $A($(form).getElementsByTagName('*')).inject([],
1905 function(elements, child) {
1906 if (Form.Element.Serializers[child.tagName.toLowerCase()])
1907 elements.push(Element.extend(child));
1913 getInputs: function(form, typeName, name) {
1915 var inputs = form.getElementsByTagName('input');
1917 if (!typeName && !name) return $A(inputs).map(Element.extend);
1919 for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
1920 var input = inputs[i];
1921 if ((typeName && input.type != typeName) || (name && input.name != name))
1923 matchingInputs.push(Element.extend(input));
1926 return matchingInputs;
1929 disable: function(form) {
1931 form.getElements().each(function(element) {
1933 element.disabled = 'true';
1938 enable: function(form) {
1940 form.getElements().each(function(element) {
1941 element.disabled = '';
1946 findFirstElement: function(form) {
1947 return $(form).getElements().find(function(element) {
1948 return element.type != 'hidden' && !element.disabled &&
1949 ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
1953 focusFirstElement: function(form) {
1955 form.findFirstElement().activate();
1960 Object.extend(Form, Form.Methods);
1962 /*--------------------------------------------------------------------------*/
1965 focus: function(element) {
1970 select: function(element) {
1971 $(element).select();
1976 Form.Element.Methods = {
1977 serialize: function(element) {
1978 element = $(element);
1979 if (!element.disabled && element.name) {
1980 var value = element.getValue();
1981 if (value != undefined) {
1983 pair[element.name] = value;
1984 return Hash.toQueryString(pair);
1990 getValue: function(element) {
1991 element = $(element);
1992 var method = element.tagName.toLowerCase();
1993 return Form.Element.Serializers[method](element);
1996 clear: function(element) {
1997 $(element).value = '';
2001 present: function(element) {
2002 return $(element).value != '';
2005 activate: function(element) {
2006 element = $(element);
2008 if (element.select && ( element.tagName.toLowerCase() != 'input' ||
2009 !['button', 'reset', 'submit'].include(element.type) ) )
2014 disable: function(element) {
2015 element = $(element);
2016 element.disabled = true;
2020 enable: function(element) {
2021 element = $(element);
2023 element.disabled = false;
2028 Object.extend(Form.Element, Form.Element.Methods);
2029 var Field = Form.Element;
2030 var $F = Form.Element.getValue;
2032 /*--------------------------------------------------------------------------*/
2034 Form.Element.Serializers = {
2035 input: function(element) {
2036 switch (element.type.toLowerCase()) {
2039 return Form.Element.Serializers.inputSelector(element);
2041 return Form.Element.Serializers.textarea(element);
2045 inputSelector: function(element) {
2046 return element.checked ? element.value : null;
2049 textarea: function(element) {
2050 return element.value;
2053 select: function(element) {
2054 return this[element.type == 'select-one' ?
2055 'selectOne' : 'selectMany'](element);
2058 selectOne: function(element) {
2059 var index = element.selectedIndex;
2060 return index >= 0 ? this.optionValue(element.options[index]) : null;
2063 selectMany: function(element) {
2064 var values, length = element.length;
2065 if (!length) return null;
2067 for (var i = 0, values = []; i < length; i++) {
2068 var opt = element.options[i];
2069 if (opt.selected) values.push(this.optionValue(opt));
2074 optionValue: function(opt) {
2075 // extend element because hasAttribute may not be native
2076 return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
2080 /*--------------------------------------------------------------------------*/
2082 Abstract.TimedObserver = function() {}
2083 Abstract.TimedObserver.prototype = {
2084 initialize: function(element, frequency, callback) {
2085 this.frequency = frequency;
2086 this.element = $(element);
2087 this.callback = callback;
2089 this.lastValue = this.getValue();
2090 this.registerCallback();
2093 registerCallback: function() {
2094 setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
2097 onTimerEvent: function() {
2098 var value = this.getValue();
2099 var changed = ('string' == typeof this.lastValue && 'string' == typeof value
2100 ? this.lastValue != value : String(this.lastValue) != String(value));
2102 this.callback(this.element, value);
2103 this.lastValue = value;
2108 Form.Element.Observer = Class.create();
2109 Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
2110 getValue: function() {
2111 return Form.Element.getValue(this.element);
2115 Form.Observer = Class.create();
2116 Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
2117 getValue: function() {
2118 return Form.serialize(this.element);
2122 /*--------------------------------------------------------------------------*/
2124 Abstract.EventObserver = function() {}
2125 Abstract.EventObserver.prototype = {
2126 initialize: function(element, callback) {
2127 this.element = $(element);
2128 this.callback = callback;
2130 this.lastValue = this.getValue();
2131 if (this.element.tagName.toLowerCase() == 'form')
2132 this.registerFormCallbacks();
2134 this.registerCallback(this.element);
2137 onElementEvent: function() {
2138 var value = this.getValue();
2139 if (this.lastValue != value) {
2140 this.callback(this.element, value);
2141 this.lastValue = value;
2145 registerFormCallbacks: function() {
2146 Form.getElements(this.element).each(this.registerCallback.bind(this));
2149 registerCallback: function(element) {
2151 switch (element.type.toLowerCase()) {
2154 Event.observe(element, 'click', this.onElementEvent.bind(this));
2157 Event.observe(element, 'change', this.onElementEvent.bind(this));
2164 Form.Element.EventObserver = Class.create();
2165 Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
2166 getValue: function() {
2167 return Form.Element.getValue(this.element);
2171 Form.EventObserver = Class.create();
2172 Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
2173 getValue: function() {
2174 return Form.serialize(this.element);
2177 if (!window.Event) {
2178 var Event = new Object();
2181 Object.extend(Event, {
2196 element: function(event) {
2197 return event.target || event.srcElement;
2200 isLeftClick: function(event) {
2201 return (((event.which) && (event.which == 1)) ||
2202 ((event.button) && (event.button == 1)));
2205 pointerX: function(event) {
2206 return event.pageX || (event.clientX +
2207 (document.documentElement.scrollLeft || document.body.scrollLeft));
2210 pointerY: function(event) {
2211 return event.pageY || (event.clientY +
2212 (document.documentElement.scrollTop || document.body.scrollTop));
2215 stop: function(event) {
2216 if (event.preventDefault) {
2217 event.preventDefault();
2218 event.stopPropagation();
2220 event.returnValue = false;
2221 event.cancelBubble = true;
2225 // find the first node with the given tagName, starting from the
2226 // node the event was triggered on; traverses the DOM upwards
2227 findElement: function(event, tagName) {
2228 var element = Event.element(event);
2229 while (element.parentNode && (!element.tagName ||
2230 (element.tagName.toUpperCase() != tagName.toUpperCase())))
2231 element = element.parentNode;
2237 _observeAndCache: function(element, name, observer, useCapture) {
2238 if (!this.observers) this.observers = [];
2239 if (element.addEventListener) {
2240 this.observers.push([element, name, observer, useCapture]);
2241 element.addEventListener(name, observer, useCapture);
2242 } else if (element.attachEvent) {
2243 this.observers.push([element, name, observer, useCapture]);
2244 element.attachEvent('on' + name, observer);
2248 unloadCache: function() {
2249 if (!Event.observers) return;
2250 for (var i = 0, length = Event.observers.length; i < length; i++) {
2251 Event.stopObserving.apply(this, Event.observers[i]);
2252 Event.observers[i][0] = null;
2254 Event.observers = false;
2257 observe: function(element, name, observer, useCapture) {
2258 element = $(element);
2259 useCapture = useCapture || false;
2261 if (name == 'keypress' &&
2262 (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
2263 || element.attachEvent))
2266 Event._observeAndCache(element, name, observer, useCapture);
2269 stopObserving: function(element, name, observer, useCapture) {
2270 element = $(element);
2271 useCapture = useCapture || false;
2273 if (name == 'keypress' &&
2274 (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
2275 || element.detachEvent))
2278 if (element.removeEventListener) {
2279 element.removeEventListener(name, observer, useCapture);
2280 } else if (element.detachEvent) {
2282 element.detachEvent('on' + name, observer);
2288 /* prevent memory leaks in IE */
2289 if (navigator.appVersion.match(/\bMSIE\b/))
2290 Event.observe(window, 'unload', Event.unloadCache, false);
2292 // set to true if needed, warning: firefox performance problems
2293 // NOT neeeded for page scrolling, only if draggable contained in
2294 // scrollable elements
2295 includeScrollOffsets: false,
2297 // must be called before calling withinIncludingScrolloffset, every time the
2299 prepare: function() {
2300 this.deltaX = window.pageXOffset
2301 || document.documentElement.scrollLeft
2302 || document.body.scrollLeft
2304 this.deltaY = window.pageYOffset
2305 || document.documentElement.scrollTop
2306 || document.body.scrollTop
2310 realOffset: function(element) {
2311 var valueT = 0, valueL = 0;
2313 valueT += element.scrollTop || 0;
2314 valueL += element.scrollLeft || 0;
2315 element = element.parentNode;
2317 return [valueL, valueT];
2320 cumulativeOffset: function(element) {
2321 var valueT = 0, valueL = 0;
2323 valueT += element.offsetTop || 0;
2324 valueL += element.offsetLeft || 0;
2325 element = element.offsetParent;
2327 return [valueL, valueT];
2330 positionedOffset: function(element) {
2331 var valueT = 0, valueL = 0;
2333 valueT += element.offsetTop || 0;
2334 valueL += element.offsetLeft || 0;
2335 element = element.offsetParent;
2337 if(element.tagName=='BODY') break;
2338 var p = Element.getStyle(element, 'position');
2339 if (p == 'relative' || p == 'absolute') break;
2342 return [valueL, valueT];
2345 offsetParent: function(element) {
2346 if (element.offsetParent) return element.offsetParent;
2347 if (element == document.body) return element;
2349 while ((element = element.parentNode) && element != document.body)
2350 if (Element.getStyle(element, 'position') != 'static')
2353 return document.body;
2356 // caches x/y coordinate pair to use with overlap
2357 within: function(element, x, y) {
2358 if (this.includeScrollOffsets)
2359 return this.withinIncludingScrolloffsets(element, x, y);
2362 this.offset = this.cumulativeOffset(element);
2364 return (y >= this.offset[1] &&
2365 y < this.offset[1] + element.offsetHeight &&
2366 x >= this.offset[0] &&
2367 x < this.offset[0] + element.offsetWidth);
2370 withinIncludingScrolloffsets: function(element, x, y) {
2371 var offsetcache = this.realOffset(element);
2373 this.xcomp = x + offsetcache[0] - this.deltaX;
2374 this.ycomp = y + offsetcache[1] - this.deltaY;
2375 this.offset = this.cumulativeOffset(element);
2377 return (this.ycomp >= this.offset[1] &&
2378 this.ycomp < this.offset[1] + element.offsetHeight &&
2379 this.xcomp >= this.offset[0] &&
2380 this.xcomp < this.offset[0] + element.offsetWidth);
2383 // within must be called directly before
2384 overlap: function(mode, element) {
2385 if (!mode) return 0;
2386 if (mode == 'vertical')
2387 return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
2388 element.offsetHeight;
2389 if (mode == 'horizontal')
2390 return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
2391 element.offsetWidth;
2394 page: function(forElement) {
2395 var valueT = 0, valueL = 0;
2397 var element = forElement;
2399 valueT += element.offsetTop || 0;
2400 valueL += element.offsetLeft || 0;
2403 if (element.offsetParent==document.body)
2404 if (Element.getStyle(element,'position')=='absolute') break;
2406 } while (element = element.offsetParent);
2408 element = forElement;
2410 if (!window.opera || element.tagName=='BODY') {
2411 valueT -= element.scrollTop || 0;
2412 valueL -= element.scrollLeft || 0;
2414 } while (element = element.parentNode);
2416 return [valueL, valueT];
2419 clone: function(source, target) {
2420 var options = Object.extend({
2427 }, arguments[2] || {})
2429 // find page position of source
2431 var p = Position.page(source);
2433 // find coordinate system to use
2437 // delta [0,0] will do fine with position: fixed elements,
2438 // position:absolute needs offsetParent deltas
2439 if (Element.getStyle(target,'position') == 'absolute') {
2440 parent = Position.offsetParent(target);
2441 delta = Position.page(parent);
2444 // correct by body offsets (fixes Safari)
2445 if (parent == document.body) {
2446 delta[0] -= document.body.offsetLeft;
2447 delta[1] -= document.body.offsetTop;
2451 if(options.setLeft) target.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
2452 if(options.setTop) target.style.top = (p[1] - delta[1] + options.offsetTop) + 'px';
2453 if(options.setWidth) target.style.width = source.offsetWidth + 'px';
2454 if(options.setHeight) target.style.height = source.offsetHeight + 'px';
2457 absolutize: function(element) {
2458 element = $(element);
2459 if (element.style.position == 'absolute') return;
2462 var offsets = Position.positionedOffset(element);
2463 var top = offsets[1];
2464 var left = offsets[0];
2465 var width = element.clientWidth;
2466 var height = element.clientHeight;
2468 element._originalLeft = left - parseFloat(element.style.left || 0);
2469 element._originalTop = top - parseFloat(element.style.top || 0);
2470 element._originalWidth = element.style.width;
2471 element._originalHeight = element.style.height;
2473 element.style.position = 'absolute';
2474 element.style.top = top + 'px';
2475 element.style.left = left + 'px';
2476 element.style.width = width + 'px';
2477 element.style.height = height + 'px';
2480 relativize: function(element) {
2481 element = $(element);
2482 if (element.style.position == 'relative') return;
2485 element.style.position = 'relative';
2486 var top = parseFloat(element.style.top || 0) - (element._originalTop || 0);
2487 var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
2489 element.style.top = top + 'px';
2490 element.style.left = left + 'px';
2491 element.style.height = element._originalHeight;
2492 element.style.width = element._originalWidth;
2496 // Safari returns margins on body which is incorrect if the child is absolutely
2497 // positioned. For performance reasons, redefine Position.cumulativeOffset for
2498 // KHTML/WebKit only.
2499 if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
2500 Position.cumulativeOffset = function(element) {
2501 var valueT = 0, valueL = 0;
2503 valueT += element.offsetTop || 0;
2504 valueL += element.offsetLeft || 0;
2505 if (element.offsetParent == document.body)
2506 if (Element.getStyle(element, 'position') == 'absolute') break;
2508 element = element.offsetParent;
2511 return [valueL, valueT];
2515 Element.addMethods();