public/javascripts/controls.js

   1 // Copyright (c) 2005-2008 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
   2 //           (c) 2005-2008 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
   3 //           (c) 2005-2008 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 = Class.create({
  42   baseInitialize: function(element, update, options) {
  43     element          = $(element);
  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     this.oldElementValue = this.element.value;
  52
  53     if(this.setOptions)
  54       this.setOptions(options);
  55     else
  56       this.options = options || { };
  57
  58     this.options.paramName    = this.options.paramName || this.element.name;
  59     this.options.tokens       = this.options.tokens || [];
  60     this.options.frequency    = this.options.frequency || 0.4;
  61     this.options.minChars     = this.options.minChars || 1;
  62     this.options.onShow       = this.options.onShow ||
  63       function(element, update){
  64         if(!update.style.position || update.style.position=='absolute') {
  65           update.style.position = 'absolute';
  66           Position.clone(element, update, {
  67             setHeight: false,
  68             offsetTop: element.offsetHeight
  69           });
  70         }
  71         Effect.Appear(update,{duration:0.15});
  72       };
  73     this.options.onHide = this.options.onHide ||
  74       function(element, update){ new Effect.Fade(update,{duration:0.15}) };
  75
  76     if(typeof(this.options.tokens) == 'string')
  77       this.options.tokens = new Array(this.options.tokens);
  78     // Force carriage returns as token delimiters anyway
  79     if (!this.options.tokens.include('\n'))
  80       this.options.tokens.push('\n');
  81
  82     this.observer = null;
  83
  84     this.element.setAttribute('autocomplete','off');
  85
  86     Element.hide(this.update);
  87
  88     Event.observe(this.element, 'blur', this.onBlur.bindAsEventListener(this));
  89     Event.observe(this.element, 'keydown', this.onKeyPress.bindAsEventListener(this));
  90   },
  91
  92   show: function() {
  93     if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update);
  94     if(!this.iefix &&
  95       (Prototype.Browser.IE) &&
  96       (Element.getStyle(this.update, 'position')=='absolute')) {
  97       new Insertion.After(this.update,
  98        '<iframe id="' + this.update.id + '_iefix" '+
  99        'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
 100        'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
 101       this.iefix = $(this.update.id+'_iefix');
 102     }
 103     if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50);
 104   },
 105
 106   fixIEOverlapping: function() {
 107     Position.clone(this.update, this.iefix, {setTop:(!this.update.style.height)});
 108     this.iefix.style.zIndex = 1;
 109     this.update.style.zIndex = 2;
 110     Element.show(this.iefix);
 111   },
 112
 113   hide: function() {
 114     this.stopIndicator();
 115     if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update);
 116     if(this.iefix) Element.hide(this.iefix);
 117   },
 118
 119   startIndicator: function() {
 120     if(this.options.indicator) Element.show(this.options.indicator);
 121   },
 122
 123   stopIndicator: function() {
 124     if(this.options.indicator) Element.hide(this.options.indicator);
 125   },
 126
 127   onKeyPress: function(event) {
 128     if(this.active)
 129       switch(event.keyCode) {
 130        case Event.KEY_TAB:
 131        case Event.KEY_RETURN:
 132          this.selectEntry();
 133          Event.stop(event);
 134        case Event.KEY_ESC:
 135          this.hide();
 136          this.active = false;
 137          Event.stop(event);
 138          return;
 139        case Event.KEY_LEFT:
 140        case Event.KEY_RIGHT:
 141          return;
 142        case Event.KEY_UP:
 143          this.markPrevious();
 144          this.render();
 145          Event.stop(event);
 146          return;
 147        case Event.KEY_DOWN:
 148          this.markNext();
 149          this.render();
 150          Event.stop(event);
 151          return;
 152       }
 153      else
 154        if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN ||
 155          (Prototype.Browser.WebKit > 0 && event.keyCode == 0)) return;
 156
 157     this.changed = true;
 158     this.hasFocus = true;
 159
 160     if(this.observer) clearTimeout(this.observer);
 161       this.observer =
 162         setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
 163   },
 164
 165   activate: function() {
 166     this.changed = false;
 167     this.hasFocus = true;
 168     this.getUpdatedChoices();
 169   },
 170
 171   onHover: function(event) {
 172     var element = Event.findElement(event, 'LI');
 173     if(this.index != element.autocompleteIndex)
 174     {
 175         this.index = element.autocompleteIndex;
 176         this.render();
 177     }
 178     Event.stop(event);
 179   },
 180
 181   onClick: function(event) {
 182     var element = Event.findElement(event, 'LI');
 183     this.index = element.autocompleteIndex;
 184     this.selectEntry();
 185     this.hide();
 186   },
 187
 188   onBlur: function(event) {
 189     // needed to make click events working
 190     setTimeout(this.hide.bind(this), 250);
 191     this.hasFocus = false;
 192     this.active = false;
 193   },
 194
 195   render: function() {
 196     if(this.entryCount > 0) {
 197       for (var i = 0; i < this.entryCount; i++)
 198         this.index==i ?
 199           Element.addClassName(this.getEntry(i),"selected") :
 200           Element.removeClassName(this.getEntry(i),"selected");
 201       if(this.hasFocus) {
 202         this.show();
 203         this.active = true;
 204       }
 205     } else {
 206       this.active = false;
 207       this.hide();
 208     }
 209   },
 210
 211   markPrevious: function() {
 212     if(this.index > 0) this.index--;
 213       else this.index = this.entryCount-1;
 214     this.getEntry(this.index).scrollIntoView(true);
 215   },
 216
 217   markNext: function() {
 218     if(this.index < this.entryCount-1) this.index++;
 219       else this.index = 0;
 220     this.getEntry(this.index).scrollIntoView(false);
 221   },
 222
 223   getEntry: function(index) {
 224     return this.update.firstChild.childNodes[index];
 225   },
 226
 227   getCurrentEntry: function() {
 228     return this.getEntry(this.index);
 229   },
 230
 231   selectEntry: function() {
 232     this.active = false;
 233     this.updateElement(this.getCurrentEntry());
 234   },
 235
 236   updateElement: function(selectedElement) {
 237     if (this.options.updateElement) {
 238       this.options.updateElement(selectedElement);
 239       return;
 240     }
 241     var value = '';
 242     if (this.options.select) {
 243       var nodes = $(selectedElement).select('.' + this.options.select) || [];
 244       if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select);
 245     } else
 246       value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal');
 247
 248     var bounds = this.getTokenBounds();
 249     if (bounds[0] != -1) {
 250       var newValue = this.element.value.substr(0, bounds[0]);
 251       var whitespace = this.element.value.substr(bounds[0]).match(/^\s+/);
 252       if (whitespace)
 253         newValue += whitespace[0];
 254       this.element.value = newValue + value + this.element.value.substr(bounds[1]);
 255     } else {
 256       this.element.value = value;
 257     }
 258     this.oldElementValue = this.element.value;
 259     this.element.focus();
 260
 261     if (this.options.afterUpdateElement)
 262       this.options.afterUpdateElement(this.element, selectedElement);
 263   },
 264
 265   updateChoices: function(choices) {
 266     if(!this.changed && this.hasFocus) {
 267       this.update.innerHTML = choices;
 268       Element.cleanWhitespace(this.update);
 269       Element.cleanWhitespace(this.update.down());
 270
 271       if(this.update.firstChild && this.update.down().childNodes) {
 272         this.entryCount =
 273           this.update.down().childNodes.length;
 274         for (var i = 0; i < this.entryCount; i++) {
 275           var entry = this.getEntry(i);
 276           entry.autocompleteIndex = i;
 277           this.addObservers(entry);
 278         }
 279       } else {
 280         this.entryCount = 0;
 281       }
 282
 283       this.stopIndicator();
 284       this.index = 0;
 285
 286       if(this.entryCount==1 && this.options.autoSelect) {
 287         this.selectEntry();
 288         this.hide();
 289       } else {
 290         this.render();
 291       }
 292     }
 293   },
 294
 295   addObservers: function(element) {
 296     Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
 297     Event.observe(element, "click", this.onClick.bindAsEventListener(this));
 298   },
 299
 300   onObserverEvent: function() {
 301     this.changed = false;
 302     this.tokenBounds = null;
 303     if(this.getToken().length>=this.options.minChars) {
 304       this.getUpdatedChoices();
 305     } else {
 306       this.active = false;
 307       this.hide();
 308     }
 309     this.oldElementValue = this.element.value;
 310   },
 311
 312   getToken: function() {
 313     var bounds = this.getTokenBounds();
 314     return this.element.value.substring(bounds[0], bounds[1]).strip();
 315   },
 316
 317   getTokenBounds: function() {
 318     if (null != this.tokenBounds) return this.tokenBounds;
 319     var value = this.element.value;
 320     if (value.strip().empty()) return [-1, 0];
 321     var diff = arguments.callee.getFirstDifferencePos(value, this.oldElementValue);
 322     var offset = (diff == this.oldElementValue.length ? 1 : 0);
 323     var prevTokenPos = -1, nextTokenPos = value.length;
 324     var tp;
 325     for (var index = 0, l = this.options.tokens.length; index < l; ++index) {
 326       tp = value.lastIndexOf(this.options.tokens[index], diff + offset - 1);
 327       if (tp > prevTokenPos) prevTokenPos = tp;
 328       tp = value.indexOf(this.options.tokens[index], diff + offset);
 329       if (-1 != tp && tp < nextTokenPos) nextTokenPos = tp;
 330     }
 331     return (this.tokenBounds = [prevTokenPos + 1, nextTokenPos]);
 332   }
 333 });
 334
 335 Autocompleter.Base.prototype.getTokenBounds.getFirstDifferencePos = function(newS, oldS) {
 336   var boundary = Math.min(newS.length, oldS.length);
 337   for (var index = 0; index < boundary; ++index)
 338     if (newS[index] != oldS[index])
 339       return index;
 340   return boundary;
 341 };
 342
 343 Ajax.Autocompleter = Class.create(Autocompleter.Base, {
 344   initialize: function(element, update, url, options) {
 345     this.baseInitialize(element, update, options);
 346     this.options.asynchronous  = true;
 347     this.options.onComplete    = this.onComplete.bind(this);
 348     this.options.defaultParams = this.options.parameters || null;
 349     this.url                   = url;
 350   },
 351
 352   getUpdatedChoices: function() {
 353     this.startIndicator();
 354
 355     var entry = encodeURIComponent(this.options.paramName) + '=' +
 356       encodeURIComponent(this.getToken());
 357
 358     this.options.parameters = this.options.callback ?
 359       this.options.callback(this.element, entry) : entry;
 360
 361     if(this.options.defaultParams)
 362       this.options.parameters += '&' + this.options.defaultParams;
 363
 364     new Ajax.Request(this.url, this.options);
 365   },
 366
 367   onComplete: function(request) {
 368     this.updateChoices(request.responseText);
 369   }
 370 });
 371
 372 // The local array autocompleter. Used when you'd prefer to
 373 // inject an array of autocompletion options into the page, rather
 374 // than sending out Ajax queries, which can be quite slow sometimes.
 375 //
 376 // The constructor takes four parameters. The first two are, as usual,
 377 // the id of the monitored textbox, and id of the autocompletion menu.
 378 // The third is the array you want to autocomplete from, and the fourth
 379 // is the options block.
 380 //
 381 // Extra local autocompletion options:
 382 // - choices - How many autocompletion choices to offer
 383 //
 384 // - partialSearch - If false, the autocompleter will match entered
 385 //                    text only at the beginning of strings in the
 386 //                    autocomplete array. Defaults to true, which will
 387 //                    match text at the beginning of any *word* in the
 388 //                    strings in the autocomplete array. If you want to
 389 //                    search anywhere in the string, additionally set
 390 //                    the option fullSearch to true (default: off).
 391 //
 392 // - fullSsearch - Search anywhere in autocomplete array strings.
 393 //
 394 // - partialChars - How many characters to enter before triggering
 395 //                   a partial match (unlike minChars, which defines
 396 //                   how many characters are required to do any match
 397 //                   at all). Defaults to 2.
 398 //
 399 // - ignoreCase - Whether to ignore case when autocompleting.
 400 //                 Defaults to true.
 401 //
 402 // It's possible to pass in a custom function as the 'selector'
 403 // option, if you prefer to write your own autocompletion logic.
 404 // In that case, the other options above will not apply unless
 405 // you support them.
 406
 407 Autocompleter.Local = Class.create(Autocompleter.Base, {
 408   initialize: function(element, update, array, options) {
 409     this.baseInitialize(element, update, options);
 410     this.options.array = array;
 411   },
 412
 413   getUpdatedChoices: function() {
 414     this.updateChoices(this.options.selector(this));
 415   },
 416
 417   setOptions: function(options) {
 418     this.options = Object.extend({
 419       choices: 10,
 420       partialSearch: true,
 421       partialChars: 2,
 422       ignoreCase: true,
 423       fullSearch: false,
 424       selector: function(instance) {
 425         var ret       = []; // Beginning matches
 426         var partial   = []; // Inside matches
 427         var entry     = instance.getToken();
 428         var count     = 0;
 429
 430         for (var i = 0; i < instance.options.array.length &&
 431           ret.length < instance.options.choices ; i++) {
 432
 433           var elem = instance.options.array[i];
 434           var foundPos = instance.options.ignoreCase ?
 435             elem.toLowerCase().indexOf(entry.toLowerCase()) :
 436             elem.indexOf(entry);
 437
 438           while (foundPos != -1) {
 439             if (foundPos == 0 && elem.length != entry.length) {
 440               ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" +
 441                 elem.substr(entry.length) + "</li>");
 442               break;
 443             } else if (entry.length >= instance.options.partialChars &&
 444               instance.options.partialSearch && foundPos != -1) {
 445               if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) {
 446                 partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" +
 447                   elem.substr(foundPos, entry.length) + "</strong>" + elem.substr(
 448                   foundPos + entry.length) + "</li>");
 449                 break;
 450               }
 451             }
 452
 453             foundPos = instance.options.ignoreCase ?
 454               elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) :
 455               elem.indexOf(entry, foundPos + 1);
 456
 457           }
 458         }
 459         if (partial.length)
 460           ret = ret.concat(partial.slice(0, instance.options.choices - ret.length));
 461         return "<ul>" + ret.join('') + "</ul>";
 462       }
 463     }, options || { });
 464   }
 465 });
 466
 467 // AJAX in-place editor and collection editor
 468 // Full rewrite by Christophe Porteneuve <tdd@tddsworld.com> (April 2007).
 469
 470 // Use this if you notice weird scrolling problems on some browsers,
 471 // the DOM might be a bit confused when this gets called so do this
 472 // waits 1 ms (with setTimeout) until it does the activation
 473 Field.scrollFreeActivate = function(field) {
 474   setTimeout(function() {
 475     Field.activate(field);
 476   }, 1);
 477 };
 478
 479 Ajax.InPlaceEditor = Class.create({
 480   initialize: function(element, url, options) {
 481     this.url = url;
 482     this.element = element = $(element);
 483     this.prepareOptions();
 484     this._controls = { };
 485     arguments.callee.dealWithDeprecatedOptions(options); // DEPRECATION LAYER!!!
 486     Object.extend(this.options, options || { });
 487     if (!this.options.formId && this.element.id) {
 488       this.options.formId = this.element.id + '-inplaceeditor';
 489       if ($(this.options.formId))
 490         this.options.formId = '';
 491     }
 492     if (this.options.externalControl)
 493       this.options.externalControl = $(this.options.externalControl);
 494     if (!this.options.externalControl)
 495       this.options.externalControlOnly = false;
 496     this._originalBackground = this.element.getStyle('background-color') || 'transparent';
 497     this.element.title = this.options.clickToEditText;
 498     this._boundCancelHandler = this.handleFormCancellation.bind(this);
 499     this._boundComplete = (this.options.onComplete || Prototype.emptyFunction).bind(this);
 500     this._boundFailureHandler = this.handleAJAXFailure.bind(this);
 501     this._boundSubmitHandler = this.handleFormSubmission.bind(this);
 502     this._boundWrapperHandler = this.wrapUp.bind(this);
 503     this.registerListeners();
 504   },
 505   checkForEscapeOrReturn: function(e) {
 506     if (!this._editing || e.ctrlKey || e.altKey || e.shiftKey) return;
 507     if (Event.KEY_ESC == e.keyCode)
 508       this.handleFormCancellation(e);
 509     else if (Event.KEY_RETURN == e.keyCode)
 510       this.handleFormSubmission(e);
 511   },
 512   createControl: function(mode, handler, extraClasses) {
 513     var control = this.options[mode + 'Control'];
 514     var text = this.options[mode + 'Text'];
 515     if ('button' == control) {
 516       var btn = document.createElement('input');
 517       btn.type = 'submit';
 518       btn.value = text;
 519       btn.className = 'editor_' + mode + '_button';
 520       if ('cancel' == mode)
 521         btn.onclick = this._boundCancelHandler;
 522       this._form.appendChild(btn);
 523       this._controls[mode] = btn;
 524     } else if ('link' == control) {
 525       var link = document.createElement('a');
 526       link.href = '#';
 527       link.appendChild(document.createTextNode(text));
 528       link.onclick = 'cancel' == mode ? this._boundCancelHandler : this._boundSubmitHandler;
 529       link.className = 'editor_' + mode + '_link';
 530       if (extraClasses)
 531         link.className += ' ' + extraClasses;
 532       this._form.appendChild(link);
 533       this._controls[mode] = link;
 534     }
 535   },
 536   createEditField: function() {
 537     var text = (this.options.loadTextURL ? this.options.loadingText : this.getText());
 538     var fld;
 539     if (1 >= this.options.rows && !/\r|\n/.test(this.getText())) {
 540       fld = document.createElement('input');
 541       fld.type = 'text';
 542       var size = this.options.size || this.options.cols || 0;
 543       if (0 < size) fld.size = size;
 544     } else {
 545       fld = document.createElement('textarea');
 546       fld.rows = (1 >= this.options.rows ? this.options.autoRows : this.options.rows);
 547       fld.cols = this.options.cols || 40;
 548     }
 549     fld.name = this.options.paramName;
 550     fld.value = text; // No HTML breaks conversion anymore
 551     fld.className = 'editor_field';
 552     if (this.options.submitOnBlur)
 553       fld.onblur = this._boundSubmitHandler;
 554     this._controls.editor = fld;
 555     if (this.options.loadTextURL)
 556       this.loadExternalText();
 557     this._form.appendChild(this._controls.editor);
 558   },
 559   createForm: function() {
 560     var ipe = this;
 561     function addText(mode, condition) {
 562       var text = ipe.options['text' + mode + 'Controls'];
 563       if (!text || condition === false) return;
 564       ipe._form.appendChild(document.createTextNode(text));
 565     };
 566     this._form = $(document.createElement('form'));
 567     this._form.id = this.options.formId;
 568     this._form.addClassName(this.options.formClassName);
 569     this._form.onsubmit = this._boundSubmitHandler;
 570     this.createEditField();
 571     if ('textarea' == this._controls.editor.tagName.toLowerCase())
 572       this._form.appendChild(document.createElement('br'));
 573     if (this.options.onFormCustomization)
 574       this.options.onFormCustomization(this, this._form);
 575     addText('Before', this.options.okControl || this.options.cancelControl);
 576     this.createControl('ok', this._boundSubmitHandler);
 577     addText('Between', this.options.okControl && this.options.cancelControl);
 578     this.createControl('cancel', this._boundCancelHandler, 'editor_cancel');
 579     addText('After', this.options.okControl || this.options.cancelControl);
 580   },
 581   destroy: function() {
 582     if (this._oldInnerHTML)
 583       this.element.innerHTML = this._oldInnerHTML;
 584     this.leaveEditMode();
 585     this.unregisterListeners();
 586   },
 587   enterEditMode: function(e) {
 588     if (this._saving || this._editing) return;
 589     this._editing = true;
 590     this.triggerCallback('onEnterEditMode');
 591     if (this.options.externalControl)
 592       this.options.externalControl.hide();
 593     this.element.hide();
 594     this.createForm();
 595     this.element.parentNode.insertBefore(this._form, this.element);
 596     if (!this.options.loadTextURL)
 597       this.postProcessEditField();
 598     if (e) Event.stop(e);
 599   },
 600   enterHover: function(e) {
 601     if (this.options.hoverClassName)
 602       this.element.addClassName(this.options.hoverClassName);
 603     if (this._saving) return;
 604     this.triggerCallback('onEnterHover');
 605   },
 606   getText: function() {
 607     return this.element.innerHTML.unescapeHTML();
 608   },
 609   handleAJAXFailure: function(transport) {
 610     this.triggerCallback('onFailure', transport);
 611     if (this._oldInnerHTML) {
 612       this.element.innerHTML = this._oldInnerHTML;
 613       this._oldInnerHTML = null;
 614     }
 615   },
 616   handleFormCancellation: function(e) {
 617     this.wrapUp();
 618     if (e) Event.stop(e);
 619   },
 620   handleFormSubmission: function(e) {
 621     var form = this._form;
 622     var value = $F(this._controls.editor);
 623     this.prepareSubmission();
 624     var params = this.options.callback(form, value) || '';
 625     if (Object.isString(params))
 626       params = params.toQueryParams();
 627     params.editorId = this.element.id;
 628     if (this.options.htmlResponse) {
 629       var options = Object.extend({ evalScripts: true }, this.options.ajaxOptions);
 630       Object.extend(options, {
 631         parameters: params,
 632         onComplete: this._boundWrapperHandler,
 633         onFailure: this._boundFailureHandler
 634       });
 635       new Ajax.Updater({ success: this.element }, this.url, options);
 636     } else {
 637       var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
 638       Object.extend(options, {
 639         parameters: params,
 640         onComplete: this._boundWrapperHandler,
 641         onFailure: this._boundFailureHandler
 642       });
 643       new Ajax.Request(this.url, options);
 644     }
 645     if (e) Event.stop(e);
 646   },
 647   leaveEditMode: function() {
 648     this.element.removeClassName(this.options.savingClassName);
 649     this.removeForm();
 650     this.leaveHover();
 651     this.element.style.backgroundColor = this._originalBackground;
 652     this.element.show();
 653     if (this.options.externalControl)
 654       this.options.externalControl.show();
 655     this._saving = false;
 656     this._editing = false;
 657     this._oldInnerHTML = null;
 658     this.triggerCallback('onLeaveEditMode');
 659   },
 660   leaveHover: function(e) {
 661     if (this.options.hoverClassName)
 662       this.element.removeClassName(this.options.hoverClassName);
 663     if (this._saving) return;
 664     this.triggerCallback('onLeaveHover');
 665   },
 666   loadExternalText: function() {
 667     this._form.addClassName(this.options.loadingClassName);
 668     this._controls.editor.disabled = true;
 669     var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
 670     Object.extend(options, {
 671       parameters: 'editorId=' + encodeURIComponent(this.element.id),
 672       onComplete: Prototype.emptyFunction,
 673       onSuccess: function(transport) {
 674         this._form.removeClassName(this.options.loadingClassName);
 675         var text = transport.responseText;
 676         if (this.options.stripLoadedTextTags)
 677           text = text.stripTags();
 678         this._controls.editor.value = text;
 679         this._controls.editor.disabled = false;
 680         this.postProcessEditField();
 681       }.bind(this),
 682       onFailure: this._boundFailureHandler
 683     });
 684     new Ajax.Request(this.options.loadTextURL, options);
 685   },
 686   postProcessEditField: function() {
 687     var fpc = this.options.fieldPostCreation;
 688     if (fpc)
 689       $(this._controls.editor)['focus' == fpc ? 'focus' : 'activate']();
 690   },
 691   prepareOptions: function() {
 692     this.options = Object.clone(Ajax.InPlaceEditor.DefaultOptions);
 693     Object.extend(this.options, Ajax.InPlaceEditor.DefaultCallbacks);
 694     [this._extraDefaultOptions].flatten().compact().each(function(defs) {
 695       Object.extend(this.options, defs);
 696     }.bind(this));
 697   },
 698   prepareSubmission: function() {
 699     this._saving = true;
 700     this.removeForm();
 701     this.leaveHover();
 702     this.showSaving();
 703   },
 704   registerListeners: function() {
 705     this._listeners = { };
 706     var listener;
 707     $H(Ajax.InPlaceEditor.Listeners).each(function(pair) {
 708       listener = this[pair.value].bind(this);
 709       this._listeners[pair.key] = listener;
 710       if (!this.options.externalControlOnly)
 711         this.element.observe(pair.key, listener);
 712       if (this.options.externalControl)
 713         this.options.externalControl.observe(pair.key, listener);
 714     }.bind(this));
 715   },
 716   removeForm: function() {
 717     if (!this._form) return;
 718     this._form.remove();
 719     this._form = null;
 720     this._controls = { };
 721   },
 722   showSaving: function() {
 723     this._oldInnerHTML = this.element.innerHTML;
 724     this.element.innerHTML = this.options.savingText;
 725     this.element.addClassName(this.options.savingClassName);
 726     this.element.style.backgroundColor = this._originalBackground;
 727     this.element.show();
 728   },
 729   triggerCallback: function(cbName, arg) {
 730     if ('function' == typeof this.options[cbName]) {
 731       this.options[cbName](this, arg);
 732     }
 733   },
 734   unregisterListeners: function() {
 735     $H(this._listeners).each(function(pair) {
 736       if (!this.options.externalControlOnly)
 737         this.element.stopObserving(pair.key, pair.value);
 738       if (this.options.externalControl)
 739         this.options.externalControl.stopObserving(pair.key, pair.value);
 740     }.bind(this));
 741   },
 742   wrapUp: function(transport) {
 743     this.leaveEditMode();
 744     // Can't use triggerCallback due to backward compatibility: requires
 745     // binding + direct element
 746     this._boundComplete(transport, this.element);
 747   }
 748 });
 749
 750 Object.extend(Ajax.InPlaceEditor.prototype, {
 751   dispose: Ajax.InPlaceEditor.prototype.destroy
 752 });
 753
 754 Ajax.InPlaceCollectionEditor = Class.create(Ajax.InPlaceEditor, {
 755   initialize: function($super, element, url, options) {
 756     this._extraDefaultOptions = Ajax.InPlaceCollectionEditor.DefaultOptions;
 757     $super(element, url, options);
 758   },
 759
 760   createEditField: function() {
 761     var list = document.createElement('select');
 762     list.name = this.options.paramName;
 763     list.size = 1;
 764     this._controls.editor = list;
 765     this._collection = this.options.collection || [];
 766     if (this.options.loadCollectionURL)
 767       this.loadCollection();
 768     else
 769       this.checkForExternalText();
 770     this._form.appendChild(this._controls.editor);
 771   },
 772
 773   loadCollection: function() {
 774     this._form.addClassName(this.options.loadingClassName);
 775     this.showLoadingText(this.options.loadingCollectionText);
 776     var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
 777     Object.extend(options, {
 778       parameters: 'editorId=' + encodeURIComponent(this.element.id),
 779       onComplete: Prototype.emptyFunction,
 780       onSuccess: function(transport) {
 781         var js = transport.responseText.strip();
 782         if (!/^\[.*\]$/.test(js)) // TODO: improve sanity check
 783           throw('Server returned an invalid collection representation.');
 784         this._collection = eval(js);
 785         this.checkForExternalText();
 786       }.bind(this),
 787       onFailure: this.onFailure
 788     });
 789     new Ajax.Request(this.options.loadCollectionURL, options);
 790   },
 791
 792   showLoadingText: function(text) {
 793     this._controls.editor.disabled = true;
 794     var tempOption = this._controls.editor.firstChild;
 795     if (!tempOption) {
 796       tempOption = document.createElement('option');
 797       tempOption.value = '';
 798       this._controls.editor.appendChild(tempOption);
 799       tempOption.selected = true;
 800     }
 801     tempOption.update((text || '').stripScripts().stripTags());
 802   },
 803
 804   checkForExternalText: function() {
 805     this._text = this.getText();
 806     if (this.options.loadTextURL)
 807       this.loadExternalText();
 808     else
 809       this.buildOptionList();
 810   },
 811
 812   loadExternalText: function() {
 813     this.showLoadingText(this.options.loadingText);
 814     var options = Object.extend({ method: 'get' }, this.options.ajaxOptions);
 815     Object.extend(options, {
 816       parameters: 'editorId=' + encodeURIComponent(this.element.id),
 817       onComplete: Prototype.emptyFunction,
 818       onSuccess: function(transport) {
 819         this._text = transport.responseText.strip();
 820         this.buildOptionList();
 821       }.bind(this),
 822       onFailure: this.onFailure
 823     });
 824     new Ajax.Request(this.options.loadTextURL, options);
 825   },
 826
 827   buildOptionList: function() {
 828     this._form.removeClassName(this.options.loadingClassName);
 829     this._collection = this._collection.map(function(entry) {
 830       return 2 === entry.length ? entry : [entry, entry].flatten();
 831     });
 832     var marker = ('value' in this.options) ? this.options.value : this._text;
 833     var textFound = this._collection.any(function(entry) {
 834       return entry[0] == marker;
 835     }.bind(this));
 836     this._controls.editor.update('');
 837     var option;
 838     this._collection.each(function(entry, index) {
 839       option = document.createElement('option');
 840       option.value = entry[0];
 841       option.selected = textFound ? entry[0] == marker : 0 == index;
 842       option.appendChild(document.createTextNode(entry[1]));
 843       this._controls.editor.appendChild(option);
 844     }.bind(this));
 845     this._controls.editor.disabled = false;
 846     Field.scrollFreeActivate(this._controls.editor);
 847   }
 848 });
 849
 850 //**** DEPRECATION LAYER FOR InPlace[Collection]Editor! ****
 851 //**** This only  exists for a while,  in order to  let ****
 852 //**** users adapt to  the new API.  Read up on the new ****
 853 //**** API and convert your code to it ASAP!            ****
 854
 855 Ajax.InPlaceEditor.prototype.initialize.dealWithDeprecatedOptions = function(options) {
 856   if (!options) return;
 857   function fallback(name, expr) {
 858     if (name in options || expr === undefined) return;
 859     options[name] = expr;
 860   };
 861   fallback('cancelControl', (options.cancelLink ? 'link' : (options.cancelButton ? 'button' :
 862     options.cancelLink == options.cancelButton == false ? false : undefined)));
 863   fallback('okControl', (options.okLink ? 'link' : (options.okButton ? 'button' :
 864     options.okLink == options.okButton == false ? false : undefined)));
 865   fallback('highlightColor', options.highlightcolor);
 866   fallback('highlightEndColor', options.highlightendcolor);
 867 };
 868
 869 Object.extend(Ajax.InPlaceEditor, {
 870   DefaultOptions: {
 871     ajaxOptions: { },
 872     autoRows: 3,                                // Use when multi-line w/ rows == 1
 873     cancelControl: 'link',                      // 'link'|'button'|false
 874     cancelText: 'cancel',
 875     clickToEditText: 'Click to edit',
 876     externalControl: null,                      // id|elt
 877     externalControlOnly: false,
 878     fieldPostCreation: 'activate',              // 'activate'|'focus'|false
 879     formClassName: 'inplaceeditor-form',
 880     formId: null,                               // id|elt
 881     highlightColor: '#ffff99',
 882     highlightEndColor: '#ffffff',
 883     hoverClassName: '',
 884     htmlResponse: true,
 885     loadingClassName: 'inplaceeditor-loading',
 886     loadingText: 'Loading...',
 887     okControl: 'button',                        // 'link'|'button'|false
 888     okText: 'ok',
 889     paramName: 'value',
 890     rows: 1,                                    // If 1 and multi-line, uses autoRows
 891     savingClassName: 'inplaceeditor-saving',
 892     savingText: 'Saving...',
 893     size: 0,
 894     stripLoadedTextTags: false,
 895     submitOnBlur: false,
 896     textAfterControls: '',
 897     textBeforeControls: '',
 898     textBetweenControls: ''
 899   },
 900   DefaultCallbacks: {
 901     callback: function(form) {
 902       return Form.serialize(form);
 903     },
 904     onComplete: function(transport, element) {
 905       // For backward compatibility, this one is bound to the IPE, and passes
 906       // the element directly.  It was too often customized, so we don't break it.
 907       new Effect.Highlight(element, {
 908         startcolor: this.options.highlightColor, keepBackgroundImage: true });
 909     },
 910     onEnterEditMode: null,
 911     onEnterHover: function(ipe) {
 912       ipe.element.style.backgroundColor = ipe.options.highlightColor;
 913       if (ipe._effect)
 914         ipe._effect.cancel();
 915     },
 916     onFailure: function(transport, ipe) {
 917       alert('Error communication with the server: ' + transport.responseText.stripTags());
 918     },
 919     onFormCustomization: null, // Takes the IPE and its generated form, after editor, before controls.
 920     onLeaveEditMode: null,
 921     onLeaveHover: function(ipe) {
 922       ipe._effect = new Effect.Highlight(ipe.element, {
 923         startcolor: ipe.options.highlightColor, endcolor: ipe.options.highlightEndColor,
 924         restorecolor: ipe._originalBackground, keepBackgroundImage: true
 925       });
 926     }
 927   },
 928   Listeners: {
 929     click: 'enterEditMode',
 930     keydown: 'checkForEscapeOrReturn',
 931     mouseover: 'enterHover',
 932     mouseout: 'leaveHover'
 933   }
 934 });
 935
 936 Ajax.InPlaceCollectionEditor.DefaultOptions = {
 937   loadingCollectionText: 'Loading options...'
 938 };
 939
 940 // Delayed observer, like Form.Element.Observer,
 941 // but waits for delay after last key input
 942 // Ideal for live-search fields
 943
 944 Form.Element.DelayedObserver = Class.create({
 945   initialize: function(element, delay, callback) {
 946     this.delay     = delay || 0.5;
 947     this.element   = $(element);
 948     this.callback  = callback;
 949     this.timer     = null;
 950     this.lastValue = $F(this.element);
 951     Event.observe(this.element,'keyup',this.delayedListener.bindAsEventListener(this));
 952   },
 953   delayedListener: function(event) {
 954     if(this.lastValue == $F(this.element)) return;
 955     if(this.timer) clearTimeout(this.timer);
 956     this.timer = setTimeout(this.onTimerEvent.bind(this), this.delay * 1000);
 957     this.lastValue = $F(this.element);
 958   },
 959   onTimerEvent: function() {
 960     this.timer = null;
 961     this.callback(this.element, $F(this.element));
 962   }
 963 });