opac/public/javascripts/controls.js

   1 // Copyright (c) 2005, 2006 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
   2 //           (c) 2005, 2006 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
   3 //           (c) 2005, 2006 Jon Tirsen (http://www.tirsen.com)
   4 // Contributors:
   5 //  Richard Livsey
   6 //  Rahul Bhargava
   7 //  Rob Wills
   8 //
   9 // script.aculo.us is freely distributable under the terms of an MIT-style license.
  10 // For details, see the script.aculo.us web site: http://script.aculo.us/
  11
  12 // Autocompleter.Base handles all the autocompletion functionality
  13 // that's independent of the data source for autocompletion. This
  14 // includes drawing the autocompletion menu, observing keyboard
  15 // and mouse events, and similar.
  16 //
  17 // Specific autocompleters need to provide, at the very least,
  18 // a getUpdatedChoices function that will be invoked every time
  19 // the text inside the monitored textbox changes. This method
  20 // should get the text for which to provide autocompletion by
  21 // invoking this.getToken(), NOT by directly accessing
  22 // this.element.value. This is to allow incremental tokenized
  23 // autocompletion. Specific auto-completion logic (AJAX, etc)
  24 // belongs in getUpdatedChoices.
  25 //
  26 // Tokenized incremental autocompletion is enabled automatically
  27 // when an autocompleter is instantiated with the 'tokens' option
  28 // in the options parameter, e.g.:
  29 // new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' });
  30 // will incrementally autocomplete with a comma as the token.
  31 // Additionally, ',' in the above example can be replaced with
  32 // a token array, e.g. { tokens: [',', '\n'] } which
  33 // enables autocompletion on multiple tokens. This is most
  34 // useful when one of the tokens is \n (a newline), as it
  35 // allows smart autocompletion after linebreaks.
  36
  37 if(typeof Effect == 'undefined')
  38   throw("controls.js requires including script.aculo.us' effects.js library");
  39
  40 var Autocompleter = {}
  41 Autocompleter.Base = function() {};
  42 Autocompleter.Base.prototype = {
  43   baseInitialize: function(element, update, options) {
  44     this.element     = $(element);
  45     this.update      = $(update);
  46     this.hasFocus    = false;
  47     this.changed     = false;
  48     this.active      = false;
  49     this.index       = 0;
  50     this.entryCount  = 0;
  51
  52     if(this.setOptions)
  53       this.setOptions(options);
  54     else
  55       this.options = options || {};
  56
  57     this.options.paramName    = this.options.paramName || this.element.name;
  58     this.options.tokens       = this.options.tokens || [];
  59     this.options.frequency    = this.options.frequency || 0.4;
  60     this.options.minChars     = this.options.minChars || 1;
  61     this.options.onShow       = this.options.onShow ||
  62       function(element, update){
  63         if(!update.style.position || update.style.position=='absolute') {
  64           update.style.position = 'absolute';
  65           Position.clone(element, update, {
  66             setHeight: false,
  67             offsetTop: element.offsetHeight
  68           });
  69         }
  70         Effect.Appear(update,{duration:0.15});
  71       };
  72     this.options.onHide = this.options.onHide ||
  73       function(element, update){ new Effect.Fade(update,{duration:0.15}) };
  74
  75     if(typeof(this.options.tokens) == 'string')
  76       this.options.tokens = new Array(this.options.tokens);
  77
  78     this.observer = null;
  79
  80     this.element.setAttribute('autocomplete','off');
  81
  82     Element.hide(this.update);
  83
  84     Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this));
  85     Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this));
  86   },
  87
  88   show: function() {
  89     if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update);
  90     if(!this.iefix &&
  91       (navigator.appVersion.indexOf('MSIE')>0) &&
  92       (navigator.userAgent.indexOf('Opera')<0) &&
  93       (Element.getStyle(this.update, 'position')=='absolute')) {
  94       new Insertion.After(this.update,
  95        '<iframe id="' + this.update.id + '_iefix" '+
  96        'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
  97        'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
  98       this.iefix = $(this.update.id+'_iefix');
  99     }
 100     if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50);
 101   },
 102
 103   fixIEOverlapping: function() {
 104     Position.clone(this.update, this.iefix, {setTop:(!this.update.style.height)});
 105     this.iefix.style.zIndex = 1;
 106     this.update.style.zIndex = 2;
 107     Element.show(this.iefix);
 108   },
 109
 110   hide: function() {
 111     this.stopIndicator();
 112     if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update);
 113     if(this.iefix) Element.hide(this.iefix);
 114   },
 115
 116   startIndicator: function() {
 117     if(this.options.indicator) Element.show(this.options.indicator);
 118   },
 119
 120   stopIndicator: function() {
 121     if(this.options.indicator) Element.hide(this.options.indicator);
 122   },
 123
 124   onKeyPress: function(event) {
 125     if(this.active)
 126       switch(event.keyCode) {
 127        case Event.KEY_TAB:
 128        case Event.KEY_RETURN:
 129          this.selectEntry();
 130          Event.stop(event);
 131        case Event.KEY_ESC:
 132          this.hide();
 133          this.active = false;
 134          Event.stop(event);
 135          return;
 136        case Event.KEY_LEFT:
 137        case Event.KEY_RIGHT:
 138          return;
 139        case Event.KEY_UP:
 140          this.markPrevious();
 141          this.render();
 142          if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
 143          return;
 144        case Event.KEY_DOWN:
 145          this.markNext();
 146          this.render();
 147          if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
 148          return;
 149       }
 150      else
 151        if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN ||
 152          (navigator.appVersion.indexOf('AppleWebKit') > 0 && event.keyCode == 0)) return;
 153
 154     this.changed = true;
 155     this.hasFocus = true;
 156
 157     if(this.observer) clearTimeout(this.observer);
 158       this.observer =
 159         setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
 160   },
 161
 162   activate: function() {
 163     this.changed = false;
 164     this.hasFocus = true;
 165     this.getUpdatedChoices();
 166   },
 167
 168   onHover: function(event) {
 169     var element = Event.findElement(event, 'LI');
 170     if(this.index != element.autocompleteIndex)
 171     {
 172         this.index = element.autocompleteIndex;
 173         this.render();
 174     }
 175     Event.stop(event);
 176   },
 177
 178   onClick: function(event) {
 179     var element = Event.findElement(event, 'LI');
 180     this.index = element.autocompleteIndex;
 181     this.selectEntry();
 182     this.hide();
 183   },
 184
 185   onBlur: function(event) {
 186     // needed to make click events working
 187     setTimeout(this.hide.bind(this), 250);
 188     this.hasFocus = false;
 189     this.active = false;
 190   },
 191
 192   render: function() {
 193     if(this.entryCount > 0) {
 194       for (var i = 0; i < this.entryCount; i++)
 195         this.index==i ?
 196           Element.addClassName(this.getEntry(i),"selected") :
 197           Element.removeClassName(this.getEntry(i),"selected");
 198
 199       if(this.hasFocus) {
 200         this.show();
 201         this.active = true;
 202       }
 203     } else {
 204       this.active = false;
 205       this.hide();
 206     }
 207   },
 208
 209   markPrevious: function() {
 210     if(this.index > 0) this.index--
 211       else this.index = this.entryCount-1;
 212     this.getEntry(this.index).scrollIntoView(true);
 213   },
 214
 215   markNext: function() {
 216     if(this.index < this.entryCount-1) this.index++
 217       else this.index = 0;
 218     this.getEntry(this.index).scrollIntoView(false);
 219   },
 220
 221   getEntry: function(index) {
 222     return this.update.firstChild.childNodes[index];
 223   },
 224
 225   getCurrentEntry: function() {
 226     return this.getEntry(this.index);
 227   },
 228
 229   selectEntry: function() {
 230     this.active = false;
 231     this.updateElement(this.getCurrentEntry());
 232   },
 233
 234   updateElement: function(selectedElement) {
 235     if (this.options.updateElement) {
 236       this.options.updateElement(selectedElement);
 237       return;
 238     }
 239     var value = '';
 240     if (this.options.select) {
 241       var nodes = document.getElementsByClassName(this.options.select, selectedElement) || [];
 242       if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select);
 243     } else
 244       value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal');
 245
 246     var lastTokenPos = this.findLastToken();
 247     if (lastTokenPos != -1) {
 248       var newValue = this.element.value.substr(0, lastTokenPos + 1);
 249       var whitespace = this.element.value.substr(lastTokenPos + 1).match(/^\s+/);
 250       if (whitespace)
 251         newValue += whitespace[0];
 252       this.element.value = newValue + value;
 253     } else {
 254       this.element.value = value;
 255     }
 256     this.element.focus();
 257
 258     if (this.options.afterUpdateElement)
 259       this.options.afterUpdateElement(this.element, selectedElement);
 260   },
 261
 262   updateChoices: function(choices) {
 263     if(!this.changed && this.hasFocus) {
 264       this.update.innerHTML = choices;
 265       Element.cleanWhitespace(this.update);
 266       Element.cleanWhitespace(this.update.down());
 267
 268       if(this.update.firstChild && this.update.down().childNodes) {
 269         this.entryCount =
 270           this.update.down().childNodes.length;
 271         for (var i = 0; i < this.entryCount; i++) {
 272           var entry = this.getEntry(i);
 273           entry.autocompleteIndex = i;
 274           this.addObservers(entry);
 275         }
 276       } else {
 277         this.entryCount = 0;
 278       }
 279
 280       this.stopIndicator();
 281       this.index = 0;
 282
 283       if(this.entryCount==1 && this.options.autoSelect) {
 284         this.selectEntry();
 285         this.hide();
 286       } else {
 287         this.render();
 288       }
 289     }
 290   },
 291
 292   addObservers: function(element) {
 293     Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
 294     Event.observe(element, "click", this.onClick.bindAsEventListener(this));
 295   },
 296
 297   onObserverEvent: function() {
 298     this.changed = false;
 299     if(this.getToken().length>=this.options.minChars) {
 300       this.startIndicator();
 301       this.getUpdatedChoices();
 302     } else {
 303       this.active = false;
 304       this.hide();
 305     }
 306   },
 307
 308   getToken: function() {
 309     var tokenPos = this.findLastToken();
 310     if (tokenPos != -1)
 311       var ret = this.element.value.substr(tokenPos + 1).replace(/^\s+/,'').replace(/\s+$/,'');
 312     else
 313       var ret = this.element.value;
 314
 315     return /\n/.test(ret) ? '' : ret;
 316   },
 317
 318   findLastToken: function() {
 319     var lastTokenPos = -1;
 320
 321     for (var i=0; i<this.options.tokens.length; i++) {
 322       var thisTokenPos = this.element.value.lastIndexOf(this.options.tokens[i]);
 323       if (thisTokenPos > lastTokenPos)
 324         lastTokenPos = thisTokenPos;
 325     }
 326     return lastTokenPos;
 327   }
 328 }
 329
 330 Ajax.Autocompleter = Class.create();
 331 Object.extend(Object.extend(Ajax.Autocompleter.prototype, Autocompleter.Base.prototype), {
 332   initialize: function(element, update, url, options) {
 333     this.baseInitialize(element, update, options);
 334     this.options.asynchronous  = true;
 335     this.options.onComplete    = this.onComplete.bind(this);
 336     this.options.defaultParams = this.options.parameters || null;
 337     this.url                   = url;
 338   },
 339
 340   getUpdatedChoices: function() {
 341     entry = encodeURIComponent(this.options.paramName) + '=' +
 342       encodeURIComponent(this.getToken());
 343
 344     this.options.parameters = this.options.callback ?
 345       this.options.callback(this.element, entry) : entry;
 346
 347     if(this.options.defaultParams)
 348       this.options.parameters += '&' + this.options.defaultParams;
 349
 350     new Ajax.Request(this.url, this.options);
 351   },
 352
 353   onComplete: function(request) {
 354     this.updateChoices(request.responseText);
 355   }
 356
 357 });
 358
 359 // The local array autocompleter. Used when you'd prefer to
 360 // inject an array of autocompletion options into the page, rather
 361 // than sending out Ajax queries, which can be quite slow sometimes.
 362 //
 363 // The constructor takes four parameters. The first two are, as usual,
 364 // the id of the monitored textbox, and id of the autocompletion menu.
 365 // The third is the array you want to autocomplete from, and the fourth
 366 // is the options block.
 367 //
 368 // Extra local autocompletion options:
 369 // - choices - How many autocompletion choices to offer
 370 //
 371 // - partialSearch - If false, the autocompleter will match entered
 372 //                    text only at the beginning of strings in the
 373 //                    autocomplete array. Defaults to true, which will
 374 //                    match text at the beginning of any *word* in the
 375 //                    strings in the autocomplete array. If you want to
 376 //                    search anywhere in the string, additionally set
 377 //                    the option fullSearch to true (default: off).
 378 //
 379 // - fullSsearch - Search anywhere in autocomplete array strings.
 380 //
 381 // - partialChars - How many characters to enter before triggering
 382 //                   a partial match (unlike minChars, which defines
 383 //                   how many characters are required to do any match
 384 //                   at all). Defaults to 2.
 385 //
 386 // - ignoreCase - Whether to ignore case when autocompleting.
 387 //                 Defaults to true.
 388 //
 389 // It's possible to pass in a custom function as the 'selector'
 390 // option, if you prefer to write your own autocompletion logic.
 391 // In that case, the other options above will not apply unless
 392 // you support them.
 393
 394 Autocompleter.Local = Class.create();
 395 Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), {
 396   initialize: function(element, update, array, options) {
 397     this.baseInitialize(element, update, options);
 398     this.options.array = array;
 399   },
 400
 401   getUpdatedChoices: function() {
 402     this.updateChoices(this.options.selector(this));
 403   },
 404
 405   setOptions: function(options) {
 406     this.options = Object.extend({
 407       choices: 10,
 408       partialSearch: true,
 409       partialChars: 2,
 410       ignoreCase: true,
 411       fullSearch: false,
 412       selector: function(instance) {
 413         var ret       = []; // Beginning matches
 414         var partial   = []; // Inside matches
 415         var entry     = instance.getToken();
 416         var count     = 0;
 417
 418         for (var i = 0; i < instance.options.array.length &&
 419           ret.length < instance.options.choices ; i++) {
 420
 421           var elem = instance.options.array[i];
 422           var foundPos = instance.options.ignoreCase ?
 423             elem.toLowerCase().indexOf(entry.toLowerCase()) :
 424             elem.indexOf(entry);
 425
 426           while (foundPos != -1) {
 427             if (foundPos == 0 && elem.length != entry.length) {
 428               ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" +
 429                 elem.substr(entry.length) + "</li>");
 430               break;
 431             } else if (entry.length >= instance.options.partialChars &&
 432               instance.options.partialSearch && foundPos != -1) {
 433               if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) {
 434                 partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" +
 435                   elem.substr(foundPos, entry.length) + "</strong>" + elem.substr(
 436                   foundPos + entry.length) + "</li>");
 437                 break;
 438               }
 439             }
 440
 441             foundPos = instance.options.ignoreCase ?
 442               elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) :
 443               elem.indexOf(entry, foundPos + 1);
 444
 445           }
 446         }
 447         if (partial.length)
 448           ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
 449         return "<ul>" + ret.join('') + "</ul>";
 450       }
 451     }, options || {});
 452   }
 453 });
 454
 455 // AJAX in-place editor
 456 //
 457 // see documentation on http://wiki.script.aculo.us/scriptaculous/show/Ajax.InPlaceEditor
 458
 459 // Use this if you notice weird scrolling problems on some browsers,
 460 // the DOM might be a bit confused when this gets called so do this
 461 // waits 1 ms (with setTimeout) until it does the activation
 462 Field.scrollFreeActivate = function(field) {
 463   setTimeout(function() {
 464     Field.activate(field);
 465   }, 1);
 466 }
 467
 468 Ajax.InPlaceEditor = Class.create();
 469 Ajax.InPlaceEditor.defaultHighlightColor = "#FFFF99";
 470 Ajax.InPlaceEditor.prototype = {
 471   initialize: function(element, url, options) {
 472     this.url = url;
 473     this.element = $(element);
 474
 475     this.options = Object.extend({
 476       paramName: "value",
 477       okButton: true,
 478       okText: "ok",
 479       cancelLink: true,
 480       cancelText: "cancel",
 481       savingText: "Saving...",
 482       clickToEditText: "Click to edit",
 483       okText: "ok",
 484       rows: 1,
 485       onComplete: function(transport, element) {
 486         new Effect.Highlight(element, {startcolor: this.options.highlightcolor});
 487       },
 488       onFailure: function(transport) {
 489         alert("Error communicating with the server: " + transport.responseText.stripTags());
 490       },
 491       callback: function(form) {
 492         return Form.serialize(form);
 493       },
 494       handleLineBreaks: true,
 495       loadingText: 'Loading...',
 496       savingClassName: 'inplaceeditor-saving',
 497       loadingClassName: 'inplaceeditor-loading',
 498       formClassName: 'inplaceeditor-form',
 499       highlightcolor: Ajax.InPlaceEditor.defaultHighlightColor,
 500       highlightendcolor: "#FFFFFF",
 501       externalControl: null,
 502       submitOnBlur: false,
 503       ajaxOptions: {},
 504       evalScripts: false
 505     }, options || {});
 506
 507     if(!this.options.formId && this.element.id) {
 508       this.options.formId = this.element.id + "-inplaceeditor";
 509       if ($(this.options.formId)) {
 510         // there's already a form with that name, don't specify an id
 511         this.options.formId = null;
 512       }
 513     }
 514
 515     if (this.options.externalControl) {
 516       this.options.externalControl = $(this.options.externalControl);
 517     }
 518
 519     this.originalBackground = Element.getStyle(this.element, 'background-color');
 520     if (!this.originalBackground) {
 521       this.originalBackground = "transparent";
 522     }
 523
 524     this.element.title = this.options.clickToEditText;
 525
 526     this.onclickListener = this.enterEditMode.bindAsEventListener(this);
 527     this.mouseoverListener = this.enterHover.bindAsEventListener(this);
 528     this.mouseoutListener = this.leaveHover.bindAsEventListener(this);
 529     Event.observe(this.element, 'click', this.onclickListener);
 530     Event.observe(this.element, 'mouseover', this.mouseoverListener);
 531     Event.observe(this.element, 'mouseout', this.mouseoutListener);
 532     if (this.options.externalControl) {
 533       Event.observe(this.options.externalControl, 'click', this.onclickListener);
 534       Event.observe(this.options.externalControl, 'mouseover', this.mouseoverListener);
 535       Event.observe(this.options.externalControl, 'mouseout', this.mouseoutListener);
 536     }
 537   },
 538   enterEditMode: function(evt) {
 539     if (this.saving) return;
 540     if (this.editing) return;
 541     this.editing = true;
 542     this.onEnterEditMode();
 543     if (this.options.externalControl) {
 544       Element.hide(this.options.externalControl);
 545     }
 546     Element.hide(this.element);
 547     this.createForm();
 548     this.element.parentNode.insertBefore(this.form, this.element);
 549     if (!this.options.loadTextURL) Field.scrollFreeActivate(this.editField);
 550     // stop the event to avoid a page refresh in Safari
 551     if (evt) {
 552       Event.stop(evt);
 553     }
 554     return false;
 555   },
 556   createForm: function() {
 557     this.form = document.createElement("form");
 558     this.form.id = this.options.formId;
 559     Element.addClassName(this.form, this.options.formClassName)
 560     this.form.onsubmit = this.onSubmit.bind(this);
 561
 562     this.createEditField();
 563
 564     if (this.options.textarea) {
 565       var br = document.createElement("br");
 566       this.form.appendChild(br);
 567     }
 568
 569     if (this.options.okButton) {
 570       okButton = document.createElement("input");
 571       okButton.type = "submit";
 572       okButton.value = this.options.okText;
 573       okButton.className = 'editor_ok_button';
 574       this.form.appendChild(okButton);
 575     }
 576
 577     if (this.options.cancelLink) {
 578       cancelLink = document.createElement("a");
 579       cancelLink.href = "#";
 580       cancelLink.appendChild(document.createTextNode(this.options.cancelText));
 581       cancelLink.onclick = this.onclickCancel.bind(this);
 582       cancelLink.className = 'editor_cancel';
 583       this.form.appendChild(cancelLink);
 584     }
 585   },
 586   hasHTMLLineBreaks: function(string) {
 587     if (!this.options.handleLineBreaks) return false;
 588     return string.match(/<br/i) || string.match(/<p>/i);
 589   },
 590   convertHTMLLineBreaks: function(string) {
 591     return string.replace(/<br>/gi, "\n").replace(/<br\/>/gi, "\n").replace(/<\/p>/gi, "\n").replace(/<p>/gi, "");
 592   },
 593   createEditField: function() {
 594     var text;
 595     if(this.options.loadTextURL) {
 596       text = this.options.loadingText;
 597     } else {
 598       text = this.getText();
 599     }
 600
 601     var obj = this;
 602
 603     if (this.options.rows == 1 && !this.hasHTMLLineBreaks(text)) {
 604       this.options.textarea = false;
 605       var textField = document.createElement("input");
 606       textField.obj = this;
 607       textField.type = "text";
 608       textField.name = this.options.paramName;
 609       textField.value = text;
 610       textField.style.backgroundColor = this.options.highlightcolor;
 611       textField.className = 'editor_field';
 612       var size = this.options.size || this.options.cols || 0;
 613       if (size != 0) textField.size = size;
 614       if (this.options.submitOnBlur)
 615         textField.onblur = this.onSubmit.bind(this);
 616       this.editField = textField;
 617     } else {
 618       this.options.textarea = true;
 619       var textArea = document.createElement("textarea");
 620       textArea.obj = this;
 621       textArea.name = this.options.paramName;
 622       textArea.value = this.convertHTMLLineBreaks(text);
 623       textArea.rows = this.options.rows;
 624       textArea.cols = this.options.cols || 40;
 625       textArea.className = 'editor_field';
 626       if (this.options.submitOnBlur)
 627         textArea.onblur = this.onSubmit.bind(this);
 628       this.editField = textArea;
 629     }
 630
 631     if(this.options.loadTextURL) {
 632       this.loadExternalText();
 633     }
 634     this.form.appendChild(this.editField);
 635   },
 636   getText: function() {
 637     return this.element.innerHTML;
 638   },
 639   loadExternalText: function() {
 640     Element.addClassName(this.form, this.options.loadingClassName);
 641     this.editField.disabled = true;
 642     new Ajax.Request(
 643       this.options.loadTextURL,
 644       Object.extend({
 645         asynchronous: true,
 646         onComplete: this.onLoadedExternalText.bind(this)
 647       }, this.options.ajaxOptions)
 648     );
 649   },
 650   onLoadedExternalText: function(transport) {
 651     Element.removeClassName(this.form, this.options.loadingClassName);
 652     this.editField.disabled = false;
 653     this.editField.value = transport.responseText.stripTags();
 654     Field.scrollFreeActivate(this.editField);
 655   },
 656   onclickCancel: function() {
 657     this.onComplete();
 658     this.leaveEditMode();
 659     return false;
 660   },
 661   onFailure: function(transport) {
 662     this.options.onFailure(transport);
 663     if (this.oldInnerHTML) {
 664       this.element.innerHTML = this.oldInnerHTML;
 665       this.oldInnerHTML = null;
 666     }
 667     return false;
 668   },
 669   onSubmit: function() {
 670     // onLoading resets these so we need to save them away for the Ajax call
 671     var form = this.form;
 672     var value = this.editField.value;
 673
 674     // do this first, sometimes the ajax call returns before we get a chance to switch on Saving...
 675     // which means this will actually switch on Saving... *after* we've left edit mode causing Saving...
 676     // to be displayed indefinitely
 677     this.onLoading();
 678
 679     if (this.options.evalScripts) {
 680       new Ajax.Request(
 681         this.url, Object.extend({
 682           parameters: this.options.callback(form, value),
 683           onComplete: this.onComplete.bind(this),
 684           onFailure: this.onFailure.bind(this),
 685           asynchronous:true,
 686           evalScripts:true
 687         }, this.options.ajaxOptions));
 688     } else  {
 689       new Ajax.Updater(
 690         { success: this.element,
 691           // don't update on failure (this could be an option)
 692           failure: null },
 693         this.url, Object.extend({
 694           parameters: this.options.callback(form, value),
 695           onComplete: this.onComplete.bind(this),
 696           onFailure: this.onFailure.bind(this)
 697         }, this.options.ajaxOptions));
 698     }
 699     // stop the event to avoid a page refresh in Safari
 700     if (arguments.length > 1) {
 701       Event.stop(arguments[0]);
 702     }
 703     return false;
 704   },
 705   onLoading: function() {
 706     this.saving = true;
 707     this.removeForm();
 708     this.leaveHover();
 709     this.showSaving();
 710   },
 711   showSaving: function() {
 712     this.oldInnerHTML = this.element.innerHTML;
 713     this.element.innerHTML = this.options.savingText;
 714     Element.addClassName(this.element, this.options.savingClassName);
 715     this.element.style.backgroundColor = this.originalBackground;
 716     Element.show(this.element);
 717   },
 718   removeForm: function() {
 719     if(this.form) {
 720       if (this.form.parentNode) Element.remove(this.form);
 721       this.form = null;
 722     }
 723   },
 724   enterHover: function() {
 725     if (this.saving) return;
 726     this.element.style.backgroundColor = this.options.highlightcolor;
 727     if (this.effect) {
 728       this.effect.cancel();
 729     }
 730     Element.addClassName(this.element, this.options.hoverClassName)
 731   },
 732   leaveHover: function() {
 733     if (this.options.backgroundColor) {
 734       this.element.style.backgroundColor = this.oldBackground;
 735     }
 736     Element.removeClassName(this.element, this.options.hoverClassName)
 737     if (this.saving) return;
 738     this.effect = new Effect.Highlight(this.element, {
 739       startcolor: this.options.highlightcolor,
 740       endcolor: this.options.highlightendcolor,
 741       restorecolor: this.originalBackground
 742     });
 743   },
 744   leaveEditMode: function() {
 745     Element.removeClassName(this.element, this.options.savingClassName);
 746     this.removeForm();
 747     this.leaveHover();
 748     this.element.style.backgroundColor = this.originalBackground;
 749     Element.show(this.element);
 750     if (this.options.externalControl) {
 751       Element.show(this.options.externalControl);
 752     }
 753     this.editing = false;
 754     this.saving = false;
 755     this.oldInnerHTML = null;
 756     this.onLeaveEditMode();
 757   },
 758   onComplete: function(transport) {
 759     this.leaveEditMode();
 760     this.options.onComplete.bind(this)(transport, this.element);
 761   },
 762   onEnterEditMode: function() {},
 763   onLeaveEditMode: function() {},
 764   dispose: function() {
 765     if (this.oldInnerHTML) {
 766       this.element.innerHTML = this.oldInnerHTML;
 767     }
 768     this.leaveEditMode();
 769     Event.stopObserving(this.element, 'click', this.onclickListener);
 770     Event.stopObserving(this.element, 'mouseover', this.mouseoverListener);
 771     Event.stopObserving(this.element, 'mouseout', this.mouseoutListener);
 772     if (this.options.externalControl) {
 773       Event.stopObserving(this.options.externalControl, 'click', this.onclickListener);
 774       Event.stopObserving(this.options.externalControl, 'mouseover', this.mouseoverListener);
 775       Event.stopObserving(this.options.externalControl, 'mouseout', this.mouseoutListener);
 776     }
 777   }
 778 };
 779
 780 Ajax.InPlaceCollectionEditor = Class.create();
 781 Object.extend(Ajax.InPlaceCollectionEditor.prototype, Ajax.InPlaceEditor.prototype);
 782 Object.extend(Ajax.InPlaceCollectionEditor.prototype, {
 783   createEditField: function() {
 784     if (!this.cached_selectTag) {
 785       var selectTag = document.createElement("select");
 786       var collection = this.options.collection || [];
 787       var optionTag;
 788       collection.each(function(e,i) {
 789         optionTag = document.createElement("option");
 790         optionTag.value = (e instanceof Array) ? e[0] : e;
 791         if((typeof this.options.value == 'undefined') &&
 792           ((e instanceof Array) ? this.element.innerHTML == e[1] : e == optionTag.value)) optionTag.selected = true;
 793         if(this.options.value==optionTag.value) optionTag.selected = true;
 794         optionTag.appendChild(document.createTextNode((e instanceof Array) ? e[1] : e));
 795         selectTag.appendChild(optionTag);
 796       }.bind(this));
 797       this.cached_selectTag = selectTag;
 798     }
 799
 800     this.editField = this.cached_selectTag;
 801     if(this.options.loadTextURL) this.loadExternalText();
 802     this.form.appendChild(this.editField);
 803     this.options.callback = function(form, value) {
 804       return "value=" + encodeURIComponent(value);
 805     }
 806   }
 807 });
 808
 809 // Delayed observer, like Form.Element.Observer,
 810 // but waits for delay after last key input
 811 // Ideal for live-search fields
 812
 813 Form.Element.DelayedObserver = Class.create();
 814 Form.Element.DelayedObserver.prototype = {
 815   initialize: function(element, delay, callback) {
 816     this.delay     = delay || 0.5;
 817     this.element   = $(element);
 818     this.callback  = callback;
 819     this.timer     = null;
 820     this.lastValue = $F(this.element);
 821     Event.observe(this.element,'keyup',this.delayedListener.bindAsEventListener(this));
 822   },
 823   delayedListener: function(event) {
 824     if(this.lastValue == $F(this.element)) return;
 825     if(this.timer) clearTimeout(this.timer);
 826     this.timer = setTimeout(this.onTimerEvent.bind(this), this.delay * 1000);
 827     this.lastValue = $F(this.element);
 828   },
 829   onTimerEvent: function() {
 830     this.timer = null;
 831     this.callback(this.element, $F(this.element));
 832   }
 833 };