<ul>
  <li>foobar</li>
  <li>foofoo</li>
</ul>

foo|
----
foo
foobar
----

foo|
----
foo
foobar
bar foobar
----

bar-foobar
bar,foobar
barfoobar (語がfooを含んでいるだけ)

以前の内容 hoge,,hoge
現在の内容 hoge,foo,hoge

0129: onKeyPress: function(event) {
...
0162:   if(this.observer) clearTimeout(this.observer);
0163:     this.observer = 
0164:       setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);

0001: // script.aculo.us controls.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008
0002: 
0003: // Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
0004: //           (c) 2005-2007 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
0005: //           (c) 2005-2007 Jon Tirsen (http://www.tirsen.com)
0006: // Contributors:
0007: //  Richard Livsey
0008: //  Rahul Bhargava
0009: //  Rob Wills
0010: // 
0011: // script.aculo.us is freely distributable under the terms of an MIT-style license.
0012: // For details, see the script.aculo.us web site: http://script.aculo.us/
0013: 

0014: // Autocompleter.Base handles all the autocompletion functionality 
0015: // that's independent of the data source for autocompletion. This
0016: // includes drawing the autocompletion menu, observing keyboard
0017: // and mouse events, and similar.
0018: //
0019: // Specific autocompleters need to provide, at the very least, 
0020: // a getUpdatedChoices function that will be invoked every time
0021: // the text inside the monitored textbox changes. This method 
0022: // should get the text for which to provide autocompletion by
0023: // invoking this.getToken(), NOT by directly accessing
0024: // this.element.value. This is to allow incremental tokenized
0025: // autocompletion. Specific auto-completion logic (AJAX, etc)
0026: // belongs in getUpdatedChoices.
0027: //
0028: // Tokenized incremental autocompletion is enabled automatically
0029: // when an autocompleter is instantiated with the 'tokens' option
0030: // in the options parameter, e.g.:
0031: // new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' });
0032: // will incrementally autocomplete with a comma as the token.
0033: // Additionally, ',' in the above example can be replaced with
0034: // a token array, e.g. { tokens: [',', '\n'] } which
0035: // enables autocompletion on multiple tokens. This is most 
0036: // useful when one of the tokens is \n (a newline), as it 
0037: // allows smart autocompletion after linebreaks.
0038:

0039: if(typeof Effect == 'undefined')
0040:   throw("controls.js requires including script.aculo.us' effects.js library");
0041: 

0042: var Autocompleter = { }
0043: Autocompleter.Base = Class.create({
0044:   baseInitialize: function(element, update, options) {
0045:     element          = $(element)
0046:     this.element     = element; 
0047:     this.update      = $(update);  
0048:     this.hasFocus    = false; 
0049:     this.changed     = false; 
0050:     this.active      = false; 
0051:     this.index       = 0;     
0052:     this.entryCount  = 0;
0053:     this.oldElementValue = this.element.value;
0054: 
0055:     if(this.setOptions)
0056:       this.setOptions(options);
0057:     else
0058:       this.options = options || { };
0059: 
0060:     this.options.paramName    = this.options.paramName || this.element.name;
0061:     this.options.tokens       = this.options.tokens || [];
0062:     this.options.frequency    = this.options.frequency || 0.4;
0063:     this.options.minChars     = this.options.minChars || 1;
0064:     this.options.onShow       = this.options.onShow || 
0065:       function(element, update){ 
0066:         if(!update.style.position || update.style.position=='absolute') {
0067:           update.style.position = 'absolute';
0068:           Position.clone(element, update, {
0069:             setHeight: false, 
0070:             offsetTop: element.offsetHeight
0071:           });
0072:         }
0073:         Effect.Appear(update,{duration:0.15});
0074:       };
0075:     this.options.onHide = this.options.onHide || 
0076:       function(element, update){ new Effect.Fade(update,{duration:0.15}) };
0077: 
0078:     if(typeof(this.options.tokens) == 'string') 
0079:       this.options.tokens = new Array(this.options.tokens);
0080:     // Force carriage returns as token delimiters anyway
0081:     if (!this.options.tokens.include('\n'))
0082:       this.options.tokens.push('\n');
0083: 
0084:     this.observer = null;
0085:     
0086:     this.element.setAttribute('autocomplete','off');
0087: 
0088:     Element.hide(this.update);
0089: 
0090:     Event.observe(this.element, 'blur', this.onBlur.bindAsEventListener(this));
0091:     Event.observe(this.element, 'keydown', this.onKeyPress.bindAsEventListener(this));
0092:   },
0093:

0094: show: function() {
0095:   if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update);
0096:   if(!this.iefix && 
0097:     (Prototype.Browser.IE) &&
0098:     (Element.getStyle(this.update, 'position')=='absolute')) {
0099:     new Insertion.After(this.update, 
0100:      '<iframe id="' + this.update.id + '_iefix" '+
0101:      'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
0102:      'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
0103:     this.iefix = $(this.update.id+'_iefix');
0104:   }
0105:   if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50);
0106: },
0107: 
0108: fixIEOverlapping: function() {
0109:   Position.clone(this.update, this.iefix, {setTop:(!this.update.style.height)});
0110:   this.iefix.style.zIndex = 1;
0111:   this.update.style.zIndex = 2;
0112:   Element.show(this.iefix);
0113: },
0114:

0115: hide: function() {
0116:   this.stopIndicator();
0117:   if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update);
0118:   if(this.iefix) Element.hide(this.iefix);
0119: },
0120:

0121: startIndicator: function() {
0122:   if(this.options.indicator) Element.show(this.options.indicator);
0123: },
0124:  
0125: stopIndicator: function() {
0126:   if(this.options.indicator) Element.hide(this.options.indicator);
0127: },
0128:

0129: onKeyPress: function(event) {
0130:   if(this.active)
0131:     switch(event.keyCode) {
0132:      case Event.KEY_TAB:
0133:      case Event.KEY_RETURN:
0134:        this.selectEntry();
0135:        Event.stop(event);
0136:      case Event.KEY_ESC:
0137:        this.hide();
0138:        this.active = false;
0139:        Event.stop(event);
0140:        return;
0141:      case Event.KEY_LEFT:
0142:      case Event.KEY_RIGHT:
0143:        return;
0144:      case Event.KEY_UP:
0145:        this.markPrevious();
0146:        this.render();
0147:        Event.stop(event);
0148:        return;
0149:      case Event.KEY_DOWN:
0150:        this.markNext();
0151:        this.render();
0152:        Event.stop(event);
0153:        return;
0154:     }
0155:    else 
0156:      if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN || 
0157:        (Prototype.Browser.WebKit > 0 && event.keyCode == 0)) return;
0158:  
0159:   this.changed = true;
0160:   this.hasFocus = true;
0161:  
0162:   if(this.observer) clearTimeout(this.observer);
0163:     this.observer = 
0164:       setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
0165: },
0166:

0167: activate: function() {
0168:   this.changed = false;
0169:   this.hasFocus = true;
0170:   this.getUpdatedChoices();
0171: },
0172:

0173: onHover: function(event) {
0174:   var element = Event.findElement(event, 'LI');
0175:   if(this.index != element.autocompleteIndex) 
0176:   {
0177:       this.index = element.autocompleteIndex;
0178:       this.render();
0179:   }
0180:   Event.stop(event);
0181: },
0182:

0183: onClick: function(event) {
0184:   var element = Event.findElement(event, 'LI');
0185:   this.index = element.autocompleteIndex;
0186:   this.selectEntry();
0187:   this.hide();
0188: },
0189:

0190: onBlur: function(event) {
0191:   // needed to make click events working
0192:   setTimeout(this.hide.bind(this), 250);
0193:   this.hasFocus = false;
0194:   this.active = false;     
0195: }, 
0196:

0197: render: function() {
0198:   if(this.entryCount > 0) {
0199:     for (var i = 0; i < this.entryCount; i++)
0200:       this.index==i ? 
0201:         Element.addClassName(this.getEntry(i),"selected") : 
0202:     Element.removeClassName(this.getEntry(i),"selected");
0203:     if(this.hasFocus) { 
0204:       this.show();
0205:       this.active = true;
0206:     }
0207:   } else {
0208:     this.active = false;
0209:     this.hide();
0210:   }
0211: },
0212:

0213: markPrevious: function() {
0214:   if(this.index > 0) this.index--
0215:     else this.index = this.entryCount-1;
0216:   this.getEntry(this.index).scrollIntoView(true);
0217: },
0218: 
0219: markNext: function() {
0220:   if(this.index < this.entryCount-1) this.index++
0221:     else this.index = 0;
0222:   this.getEntry(this.index).scrollIntoView(false);
0223: },
0224:

0225: getEntry: function(index) {
0226:   return this.update.firstChild.childNodes[index];
0227: },
0228:

0229: getCurrentEntry: function() {
0230:   return this.getEntry(this.index);
0231: },  
0232:

0233: selectEntry: function() {
0234:   this.active = false;
0235:   this.updateElement(this.getCurrentEntry());
0236: },
0237:

0238: updateElement: function(selectedElement) {
0239:   if (this.options.updateElement) {
0240:     this.options.updateElement(selectedElement);
0241:     return;
0242:   }
0243:   var value = '';
0244:   if (this.options.select) {
0245:     var nodes = $(selectedElement).select('.' + this.options.select) || [];
0246:     if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select);
0247:   } else
0248:     value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal');
0249:

<li>
  無駄無駄
  <span class="selectme">foobar</span>
</li>

<li>
  <span class="informal">無視無視</span>
  foobar
</li>

0250:   var bounds = this.getTokenBounds();
0251:   if (bounds[0] != -1) {
0252:     var newValue = this.element.value.substr(0, bounds[0]);
0253:     var whitespace = this.element.value.substr(bounds[0]).match(/^\s+/);
0254:     if (whitespace)
0255:       newValue += whitespace[0];
0256:     this.element.value = newValue + value + this.element.value.substr(bounds[1]);
0257:   } else {
0258:     this.element.value = value;
0259:   }
0260:   this.oldElementValue = this.element.value;
0261:   this.element.focus();
0262: 
0263:   if (this.options.afterUpdateElement)
0264:     this.options.afterUpdateElement(this.element, selectedElement);
0265: },
0266:

0267: updateChoices: function(choices) {
0268:   if(!this.changed && this.hasFocus) {
0269:     this.update.innerHTML = choices;
0270:     Element.cleanWhitespace(this.update);
0271:     Element.cleanWhitespace(this.update.down());
0272:  
0273:     if(this.update.firstChild && this.update.down().childNodes) {
0274:       this.entryCount = 
0275:         this.update.down().childNodes.length;
0276:       for (var i = 0; i < this.entryCount; i++) {
0277:         var entry = this.getEntry(i);
0278:         entry.autocompleteIndex = i;
0279:         this.addObservers(entry);
0280:       }
0281:     } else { 
0282:       this.entryCount = 0;
0283:     }
0284:  
0285:     this.stopIndicator();
0286:     this.index = 0;
0287:   
0288:     if(this.entryCount==1 && this.options.autoSelect) {
0289:       this.selectEntry();
0290:       this.hide();
0291:     } else {
0292:       this.render();
0293:     }
0294:   }
0295: },
0296:

<ul>
  <li>
    foo
  </li>
  <li>
    <span class="informal">無視無視</span>
    foobar
  </li>
</ul>

0297: addObservers: function(element) {
0298:   Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
0299:   Event.observe(element, "click", this.onClick.bindAsEventListener(this));
0300: },
0301:

0302: onObserverEvent: function() {
0303:   this.changed = false;   
0304:   this.tokenBounds = null;
0305:   if(this.getToken().length>=this.options.minChars) {
0306:     this.getUpdatedChoices();
0307:   } else {
0308:     this.active = false;
0309:     this.hide();
0310:   }
0311:   this.oldElementValue = this.element.value;
0312: },
0313:

0314: getToken: function() {
0315:   var bounds = this.getTokenBounds();
0316:   return this.element.value.substring(bounds[0], bounds[1]).strip();
0317: },
0318:

0319: getTokenBounds: function() {
0320:   if (null != this.tokenBounds) return this.tokenBounds;
0321:   var value = this.element.value;
0322:   if (value.strip().empty()) return [-1, 0];
0323:   var diff = arguments.callee.getFirstDifferencePos(value, this.oldElementValue);
0324:   var offset = (diff == this.oldElementValue.length ? 1 : 0);
0325:   var prevTokenPos = -1, nextTokenPos = value.length;
0326:   var tp;
0327:   for (var index = 0, l = this.options.tokens.length; index < l; ++index) {
0328:     tp = value.lastIndexOf(this.options.tokens[index], diff + offset - 1);
0329:     if (tp > prevTokenPos) prevTokenPos = tp;
0330:     tp = value.indexOf(this.options.tokens[index], diff + offset);
0331:     if (-1 != tp && tp < nextTokenPos) nextTokenPos = tp;
0332:   }
0333:   return (this.tokenBounds = [prevTokenPos + 1, nextTokenPos]);
0334:}
0335:});
0336:

if (前回の結果を消さずにこの関数を呼び出した場合) return 前回の内容;

if (入力エリアの内容が空かスペースだけの場合) return [-1,0];

0337:  Autocompleter.Base.prototype.getTokenBounds.getFirstDifferencePos = function(newS, oldS) {
0338:   var boundary = Math.min(newS.length, oldS.length);
0339:   for (var index = 0; index < boundary; ++index)
0340:     if (newS[index] != oldS[index])
0341:       return index;
0342:     return boundary;
0343:  };
0344:

0345: Ajax.Autocompleter = Class.create(Autocompleter.Base, {
0346:   initialize: function(element, update, url, options) {
0347:     this.baseInitialize(element, update, options);
0348:     this.options.asynchronous  = true;
0349:     this.options.onComplete    = this.onComplete.bind(this);
0350:     this.options.defaultParams = this.options.parameters || null;
0351:     this.url                   = url;
0352:   },
0353:

0354: getUpdatedChoices: function() {
0355:   this.startIndicator();
0356:   
0357:   var entry = encodeURIComponent(this.options.paramName) + '=' + 
0358:     encodeURIComponent(this.getToken());
0359:  
0360:   this.options.parameters = this.options.callback ?
0361:     this.options.callback(this.element, entry) : entry;
0362:  
0363:   if(this.options.defaultParams) 
0364:     this.options.parameters += '&' + this.options.defaultParams;
0365:   
0366:   new Ajax.Request(this.url, this.options);
0367: },
0368:

0369: onComplete: function(request) {
0370:   this.updateChoices(request.responseText);
0371: }
0372: });
0373:

0374: // The local array autocompleter. Used when you'd prefer to
0375: // inject an array of autocompletion options into the page, rather
0376: // than sending out Ajax queries, which can be quite slow sometimes.
0377: //
0378: // The constructor takes four parameters. The first two are, as usual,
0379: // the id of the monitored textbox, and id of the autocompletion menu.
0380: // The third is the array you want to autocomplete from, and the fourth
0381: // is the options block.
0382: //
0383: // Extra local autocompletion options:
0384: // - choices - How many autocompletion choices to offer
0385: //
0386: // - partialSearch - If false, the autocompleter will match entered
0387: //                    text only at the beginning of strings in the 
0388: //                    autocomplete array. Defaults to true, which will
0389: //                    match text at the beginning of any *word* in the
0390: //                    strings in the autocomplete array. If you want to
0391: //                    search anywhere in the string, additionally set
0392: //                    the option fullSearch to true (default: off).
0393: //
0394: // - fullSsearch - Search anywhere in autocomplete array strings.
0395: //
0396: // - partialChars - How many characters to enter before triggering
0397: //                   a partial match (unlike minChars, which defines
0398: //                   how many characters are required to do any match
0399: //                   at all). Defaults to 2.
0400: //
0401: // - ignoreCase - Whether to ignore case when autocompleting.
0402: //                 Defaults to true.
0403: //
0404: // It's possible to pass in a custom function as the 'selector' 
0405: // option, if you prefer to write your own autocompletion logic.
0406: // In that case, the other options above will not apply unless
0407: // you support them.

0409: Autocompleter.Local = Class.create(Autocompleter.Base, {
0410:   initialize: function(element, update, array, options) {
0411:     this.baseInitialize(element, update, options);
0412:     this.options.array = array;
0413:   },
0414:

0415: getUpdatedChoices: function() {
0416:   this.updateChoices(this.options.selector(this));
0417: },
0418:

0419: setOptions: function(options) {
0420:   this.options = Object.extend({
0421:     choices: 10,
0422:     partialSearch: true,
0423:     partialChars: 2,
0424:     ignoreCase: true,
0425:     fullSearch: false,
0426:     selector: function(instance) {
0427:       var ret       = []; // Beginning matches
0428:       var partial   = []; // Inside matches
0429:       var entry     = instance.getToken();
0430:       var count     = 0;
0431:  
0432:       for (var i = 0; i < instance.options.array.length &&  
0433:         ret.length < instance.options.choices ; i++) { 
0434:  
0435:         var elem = instance.options.array[i];
0436:         var foundPos = instance.options.ignoreCase ? 
0437:           elem.toLowerCase().indexOf(entry.toLowerCase()) : 
0438:           elem.indexOf(entry);
0439:  
0440:         while (foundPos != -1) {
0441:           if (foundPos == 0 && elem.length != entry.length) { 
0442:             ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" + 
0443:               elem.substr(entry.length) + "</li>");
0444:             break;
0445:           } else if (entry.length >= instance.options.partialChars && 
0446:             instance.options.partialSearch && foundPos != -1) {
0447:             if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) {
0448:               partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" +
0449:                 elem.substr(foundPos, entry.length) + "</strong>" + elem.substr(
0450:                 foundPos + entry.length) + "</li>");
0451:               break;
0452:             }
0453:           }
0454:  
0455:           foundPos = instance.options.ignoreCase ? 
0456:             elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) : 
0457:             elem.indexOf(entry, foundPos + 1);
0458:  
0459:         }
0460:       }
0461:       if (partial.length)
0462:         ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
0463:       return "<ul>" + ret.join('') + "</ul>";
0464:     }
0465:   }, options || { });
0466: }
0467:});
0468: