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File: controls.js
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Description: Javascript Library
Class: AJAX Poll
Process a poll without reloading the poll page
Author: By
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Date: 16 years ago
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// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) // (c) 2005 Ivan Krstic (http://blogs.law.harvard.edu/ivan) // (c) 2005 Jon Tirsen (http://www.tirsen.com) // Contributors: // Richard Livsey // Rahul Bhargava // Rob Wills // // See scriptaculous.js for full license. // Autocompleter.Base handles all the autocompletion functionality // that's independent of the data source for autocompletion. This // includes drawing the autocompletion menu, observing keyboard // and mouse events, and similar. // // Specific autocompleters need to provide, at the very least, // a getUpdatedChoices function that will be invoked every time // the text inside the monitored textbox changes. This method // should get the text for which to provide autocompletion by // invoking this.getToken(), NOT by directly accessing // this.element.value. This is to allow incremental tokenized // autocompletion. Specific auto-completion logic (AJAX, etc) // belongs in getUpdatedChoices. // // Tokenized incremental autocompletion is enabled automatically // when an autocompleter is instantiated with the 'tokens' option // in the options parameter, e.g.: // new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' }); // will incrementally autocomplete with a comma as the token. // Additionally, ',' in the above example can be replaced with // a token array, e.g. { tokens: [',', '\n'] } which // enables autocompletion on multiple tokens. This is most // useful when one of the tokens is \n (a newline), as it // allows smart autocompletion after linebreaks. var Autocompleter = {} Autocompleter.Base = function() {}; Autocompleter.Base.prototype = { baseInitialize: function(element, update, options) { this.element = $(element); this.update = $(update); this.hasFocus = false; this.changed = false; this.active = false; this.index = 0; this.entryCount = 0; if (this.setOptions) this.setOptions(options); else this.options = options || {}; this.options.paramName = this.options.paramName || this.element.name; this.options.tokens = this.options.tokens || []; this.options.frequency = this.options.frequency || 0.4; this.options.minChars = this.options.minChars || 1; this.options.onShow = this.options.onShow || function(element, update){ if(!update.style.position || update.style.position=='absolute') { update.style.position = 'absolute'; Position.clone(element, update, {setHeight: false, offsetTop: element.offsetHeight}); } Effect.Appear(update,{duration:0.15}); }; this.options.onHide = this.options.onHide || function(element, update){ new Effect.Fade(update,{duration:0.15}) }; if (typeof(this.options.tokens) == 'string') this.options.tokens = new Array(this.options.tokens); this.observer = null; this.element.setAttribute('autocomplete','off'); Element.hide(this.update); Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this)); Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this)); }, show: function() { if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update); if(!this.iefix && (navigator.appVersion.indexOf('MSIE')>0) && (navigator.userAgent.indexOf('Opera')<0) && (Element.getStyle(this.update, 'position')=='absolute')) { new Insertion.After(this.update, '<iframe id="' + this.update.id + '_iefix" '+ 'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' + 'src="javascript:false;" frameborder="0" scrolling="no"></iframe>'); this.iefix = $(this.update.id+'_iefix'); } if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50); }, fixIEOverlapping: function() { Position.clone(this.update, this.iefix); this.iefix.style.zIndex = 1; this.update.style.zIndex = 2; Element.show(this.iefix); }, hide: function() { this.stopIndicator(); if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update); if(this.iefix) Element.hide(this.iefix); }, startIndicator: function() { if(this.options.indicator) Element.show(this.options.indicator); }, stopIndicator: function() { if(this.options.indicator) Element.hide(this.options.indicator); }, onKeyPress: function(event) { if(this.active) switch(event.keyCode) { case Event.KEY_TAB: case Event.KEY_RETURN: this.selectEntry(); Event.stop(event); case Event.KEY_ESC: this.hide(); this.active = false; Event.stop(event); return; case Event.KEY_LEFT: case Event.KEY_RIGHT: return; case Event.KEY_UP: this.markPrevious(); this.render(); if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event); return; case Event.KEY_DOWN: this.markNext(); this.render(); if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event); return; } else if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN || (navigator.appVersion.indexOf('AppleWebKit') > 0 && event.keyCode == 0)) return; this.changed = true; this.hasFocus = true; if(this.observer) clearTimeout(this.observer); this.observer = setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000); }, activate: function() { this.changed = false; this.hasFocus = true; this.getUpdatedChoices(); }, onHover: function(event) { var element = Event.findElement(event, 'LI'); if(this.index != element.autocompleteIndex) { this.index = element.autocompleteIndex; this.render(); } Event.stop(event); }, onClick: function(event) { var element = Event.findElement(event, 'LI'); this.index = element.autocompleteIndex; this.selectEntry(); this.hide(); }, onBlur: function(event) { // needed to make click events working setTimeout(this.hide.bind(this), 250); this.hasFocus = false; this.active = false; }, render: function() { if(this.entryCount > 0) { for (var i = 0; i < this.entryCount; i++) this.index==i ? Element.addClassName(this.getEntry(i),"selected") : Element.removeClassName(this.getEntry(i),"selected"); if(this.hasFocus) { this.show(); this.active = true; } } else { this.active = false; this.hide(); } }, markPrevious: function() { if(this.index > 0) this.index-- else this.index = this.entryCount-1; }, markNext: function() { if(this.index < this.entryCount-1) this.index++ else this.index = 0; }, getEntry: function(index) { return this.update.firstChild.childNodes[index]; }, getCurrentEntry: function() { return this.getEntry(this.index); }, selectEntry: function() { this.active = false; this.updateElement(this.getCurrentEntry()); }, updateElement: function(selectedElement) { if (this.options.updateElement) { this.options.updateElement(selectedElement); return; } var value = ''; if (this.options.select) { var nodes = document.getElementsByClassName(this.options.select, selectedElement) || []; if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select); } else value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal'); var lastTokenPos = this.findLastToken(); if (lastTokenPos != -1) { var newValue = this.element.value.substr(0, lastTokenPos + 1); var whitespace = this.element.value.substr(lastTokenPos + 1).match(/^\s+/); if (whitespace) newValue += whitespace[0]; this.element.value = newValue + value; } else { this.element.value = value; } this.element.focus(); if (this.options.afterUpdateElement) this.options.afterUpdateElement(this.element, selectedElement); }, updateChoices: function(choices) { if(!this.changed && this.hasFocus) { this.update.innerHTML = choices; Element.cleanWhitespace(this.update); Element.cleanWhitespace(this.update.firstChild); if(this.update.firstChild && this.update.firstChild.childNodes) { this.entryCount = this.update.firstChild.childNodes.length; for (var i = 0; i < this.entryCount; i++) { var entry = this.getEntry(i); entry.autocompleteIndex = i; this.addObservers(entry); } } else { this.entryCount = 0; } this.stopIndicator(); this.index = 0; this.render(); } }, addObservers: function(element) { Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this)); Event.observe(element, "click", this.onClick.bindAsEventListener(this)); }, onObserverEvent: function() { this.changed = false; if(this.getToken().length>=this.options.minChars) { this.startIndicator(); this.getUpdatedChoices(); } else { this.active = false; this.hide(); } }, getToken: function() { var tokenPos = this.findLastToken(); if (tokenPos != -1) var ret = this.element.value.substr(tokenPos + 1).replace(/^\s+/,'').replace(/\s+$/,''); else var ret = this.element.value; return /\n/.test(ret) ? '' : ret; }, findLastToken: function() { var lastTokenPos = -1; for (var i=0; i<this.options.tokens.length; i++) { var thisTokenPos = this.element.value.lastIndexOf(this.options.tokens[i]); if (thisTokenPos > lastTokenPos) lastTokenPos = thisTokenPos; } return lastTokenPos; } } Ajax.Autocompleter = Class.create(); Object.extend(Object.extend(Ajax.Autocompleter.prototype, Autocompleter.Base.prototype), { initialize: function(element, update, url, options) { this.baseInitialize(element, update, options); this.options.asynchronous = true; this.options.onComplete = this.onComplete.bind(this); this.options.defaultParams = this.options.parameters || null; this.url = url; }, getUpdatedChoices: function() { entry = encodeURIComponent(this.options.paramName) + '=' + encodeURIComponent(this.getToken()); this.options.parameters = this.options.callback ? this.options.callback(this.element, entry) : entry; if(this.options.defaultParams) this.options.parameters += '&' + this.options.defaultParams; new Ajax.Request(this.url, this.options); }, onComplete: function(request) { this.updateChoices(request.responseText); } }); // The local array autocompleter. Used when you'd prefer to // inject an array of autocompletion options into the page, rather // than sending out Ajax queries, which can be quite slow sometimes. // // The constructor takes four parameters. The first two are, as usual, // the id of the monitored textbox, and id of the autocompletion menu. // The third is the array you want to autocomplete from, and the fourth // is the options block. // // Extra local autocompletion options: // - choices - How many autocompletion choices to offer // // - partialSearch - If false, the autocompleter will match entered // text only at the beginning of strings in the // autocomplete array. Defaults to true, which will // match text at the beginning of any *word* in the // strings in the autocomplete array. If you want to // search anywhere in the string, additionally set // the option fullSearch to true (default: off). // // - fullSsearch - Search anywhere in autocomplete array strings. // // - partialChars - How many characters to enter before triggering // a partial match (unlike minChars, which defines // how many characters are required to do any match // at all). Defaults to 2. // // - ignoreCase - Whether to ignore case when autocompleting. // Defaults to true. // // It's possible to pass in a custom function as the 'selector' // option, if you prefer to write your own autocompletion logic. // In that case, the other options above will not apply unless // you support them. Autocompleter.Local = Class.create(); Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), { initialize: function(element, update, array, options) { this.baseInitialize(element, update, options); this.options.array = array; }, getUpdatedChoices: function() { this.updateChoices(this.options.selector(this)); }, setOptions: function(options) { this.options = Object.extend({ choices: 10, partialSearch: true, partialChars: 2, ignoreCase: true, fullSearch: false, selector: function(instance) { var ret = []; // Beginning matches var partial = []; // Inside matches var entry = instance.getToken(); var count = 0; for (var i = 0; i < instance.options.array.length && ret.length < instance.options.choices ; i++) { var elem = instance.options.array[i]; var foundPos = instance.options.ignoreCase ? elem.toLowerCase().indexOf(entry.toLowerCase()) : elem.indexOf(entry); while (foundPos != -1) { if (foundPos == 0 && elem.length != entry.length) { ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" + elem.substr(entry.length) + "</li>"); break; } else if (entry.length >= instance.options.partialChars && instance.options.partialSearch && foundPos != -1) { if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) { partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" + elem.substr(foundPos, entry.length) + "</strong>" + elem.substr( foundPos + entry.length) + "</li>"); break; } } foundPos = instance.options.ignoreCase ? elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) : elem.indexOf(entry, foundPos + 1); } } if (partial.length) ret = ret.concat(partial.slice(0, instance.options.choices - ret.length)) return "<ul>" + ret.join('') + "</ul>"; } }, options || {}); } }); // AJAX in-place editor // // see documentation on http://wiki.script.aculo.us/scriptaculous/show/Ajax.InPlaceEditor // Use this if you notice weird scrolling problems on some browsers, // the DOM might be a bit confused when this gets called so do this // waits 1 ms (with setTimeout) until it does the activation Field.scrollFreeActivate = function(field) { setTimeout(function() { Field.activate(field); }, 1); } Ajax.InPlaceEditor = Class.create(); Ajax.InPlaceEditor.defaultHighlightColor = "#FFFF99"; Ajax.InPlaceEditor.prototype = { initialize: function(element, url, options) { this.url = url; this.element = $(element); this.options = Object.extend({ okButton: true, okText: "ok", cancelLink: true, cancelText: "cancel", savingText: "Saving...", clickToEditText: "Click to edit", okText: "ok", rows: 1, onComplete: function(transport, element) { new Effect.Highlight(element, {startcolor: this.options.highlightcolor}); }, onFailure: function(transport) { alert("Error communicating with the server: " + transport.responseText.stripTags()); }, callback: function(form) { return Form.serialize(form); }, handleLineBreaks: true, loadingText: 'Loading...', savingClassName: 'inplaceeditor-saving', loadingClassName: 'inplaceeditor-loading', formClassName: 'inplaceeditor-form', highlightcolor: Ajax.InPlaceEditor.defaultHighlightColor, highlightendcolor: "#FFFFFF", externalControl: null, submitOnBlur: false, ajaxOptions: {}, evalScripts: false }, options || {}); if(!this.options.formId && this.element.id) { this.options.formId = this.element.id + "-inplaceeditor"; if ($(this.options.formId)) { // there's already a form with that name, don't specify an id this.options.formId = null; } } if (this.options.externalControl) { this.options.externalControl = $(this.options.externalControl); } this.originalBackground = Element.getStyle(this.element, 'background-color'); if (!this.originalBackground) { this.originalBackground = "transparent"; } this.element.title = this.options.clickToEditText; this.onclickListener = this.enterEditMode.bindAsEventListener(this); this.mouseoverListener = this.enterHover.bindAsEventListener(this); this.mouseoutListener = this.leaveHover.bindAsEventListener(this); Event.observe(this.element, 'click', this.onclickListener); Event.observe(this.element, 'mouseover', this.mouseoverListener); Event.observe(this.element, 'mouseout', this.mouseoutListener); if (this.options.externalControl) { Event.observe(this.options.externalControl, 'click', this.onclickListener); Event.observe(this.options.externalControl, 'mouseover', this.mouseoverListener); Event.observe(this.options.externalControl, 'mouseout', this.mouseoutListener); } }, enterEditMode: function(evt) { if (this.saving) return; if (this.editing) return; this.editing = true; this.onEnterEditMode(); if (this.options.externalControl) { Element.hide(this.options.externalControl); } Element.hide(this.element); this.createForm(); this.element.parentNode.insertBefore(this.form, this.element); Field.scrollFreeActivate(this.editField); // stop the event to avoid a page refresh in Safari if (evt) { Event.stop(evt); } return false; }, createForm: function() { this.form = document.createElement("form"); this.form.id = this.options.formId; Element.addClassName(this.form, this.options.formClassName) this.form.onsubmit = this.onSubmit.bind(this); this.createEditField(); if (this.options.textarea) { var br = document.createElement("br"); this.form.appendChild(br); } if (this.options.okButton) { okButton = document.createElement("input"); okButton.type = "submit"; okButton.value = this.options.okText; okButton.className = 'editor_ok_button'; this.form.appendChild(okButton); } if (this.options.cancelLink) { cancelLink = document.createElement("a"); cancelLink.href = "#"; cancelLink.appendChild(document.createTextNode(this.options.cancelText)); cancelLink.onclick = this.onclickCancel.bind(this); cancelLink.className = 'editor_cancel'; this.form.appendChild(cancelLink); } }, hasHTMLLineBreaks: function(string) { if (!this.options.handleLineBreaks) return false; return string.match(/<br/i) || string.match(/<p>/i); }, convertHTMLLineBreaks: function(string) { return string.replace(/<br>/gi, "\n").replace(/<br\/>/gi, "\n").replace(/<\/p>/gi, "\n").replace(/<p>/gi, ""); }, createEditField: function() { var text; if(this.options.loadTextURL) { text = this.options.loadingText; } else { text = this.getText(); } var obj = this; if (this.options.rows == 1 && !this.hasHTMLLineBreaks(text)) { this.options.textarea = false; var textField = document.createElement("input"); textField.obj = this; textField.type = "text"; textField.name = "value"; textField.value = text; textField.style.backgroundColor = this.options.highlightcolor; textField.className = 'editor_field'; var size = this.options.size || this.options.cols || 0; if (size != 0) textField.size = size; if (this.options.submitOnBlur) textField.onblur = this.onSubmit.bind(this); this.editField = textField; } else { this.options.textarea = true; var textArea = document.createElement("textarea"); textArea.obj = this; textArea.name = "value"; textArea.value = this.convertHTMLLineBreaks(text); textArea.rows = this.options.rows; textArea.cols = this.options.cols || 40; textArea.className = 'editor_field'; if (this.options.submitOnBlur) textArea.onblur = this.onSubmit.bind(this); this.editField = textArea; } if(this.options.loadTextURL) { this.loadExternalText(); } this.form.appendChild(this.editField); }, getText: function() { return this.element.innerHTML; }, loadExternalText: function() { Element.addClassName(this.form, this.options.loadingClassName); this.editField.disabled = true; new Ajax.Request( this.options.loadTextURL, Object.extend({ asynchronous: true, onComplete: this.onLoadedExternalText.bind(this) }, this.options.ajaxOptions) ); }, onLoadedExternalText: function(transport) { Element.removeClassName(this.form, this.options.loadingClassName); this.editField.disabled = false; this.editField.value = transport.responseText.stripTags(); }, onclickCancel: function() { this.onComplete(); this.leaveEditMode(); return false; }, onFailure: function(transport) { this.options.onFailure(transport); if (this.oldInnerHTML) { this.element.innerHTML = this.oldInnerHTML; this.oldInnerHTML = null; } return false; }, onSubmit: function() { // onLoading resets these so we need to save them away for the Ajax call var form = this.form; var value = this.editField.value; // do this first, sometimes the ajax call returns before we get a chance to switch on Saving... // which means this will actually switch on Saving... *after* we've left edit mode causing Saving... // to be displayed indefinitely this.onLoading(); if (this.options.evalScripts) { new Ajax.Request( this.url, Object.extend({ parameters: this.options.callback(form, value), onComplete: this.onComplete.bind(this), onFailure: this.onFailure.bind(this), asynchronous:true, evalScripts:true }, this.options.ajaxOptions)); } else { new Ajax.Updater( { success: this.element, // don't update on failure (this could be an option) failure: null }, this.url, Object.extend({ parameters: this.options.callback(form, value), onComplete: this.onComplete.bind(this), onFailure: this.onFailure.bind(this) }, this.options.ajaxOptions)); } // stop the event to avoid a page refresh in Safari if (arguments.length > 1) { Event.stop(arguments[0]); } return false; }, onLoading: function() { this.saving = true; this.removeForm(); this.leaveHover(); this.showSaving(); }, showSaving: function() { this.oldInnerHTML = this.element.innerHTML; this.element.innerHTML = this.options.savingText; Element.addClassName(this.element, this.options.savingClassName); this.element.style.backgroundColor = this.originalBackground; Element.show(this.element); }, removeForm: function() { if(this.form) { if (this.form.parentNode) Element.remove(this.form); this.form = null; } }, enterHover: function() { if (this.saving) return; this.element.style.backgroundColor = this.options.highlightcolor; if (this.effect) { this.effect.cancel(); } Element.addClassName(this.element, this.options.hoverClassName) }, leaveHover: function() { if (this.options.backgroundColor) { this.element.style.backgroundColor = this.oldBackground; } Element.removeClassName(this.element, this.options.hoverClassName) if (this.saving) return; this.effect = new Effect.Highlight(this.element, { startcolor: this.options.highlightcolor, endcolor: this.options.highlightendcolor, restorecolor: this.originalBackground }); }, leaveEditMode: function() { Element.removeClassName(this.element, this.options.savingClassName); this.removeForm(); this.leaveHover(); this.element.style.backgroundColor = this.originalBackground; Element.show(this.element); if (this.options.externalControl) { Element.show(this.options.externalControl); } this.editing = false; this.saving = false; this.oldInnerHTML = null; this.onLeaveEditMode(); }, onComplete: function(transport) { this.leaveEditMode(); this.options.onComplete.bind(this)(transport, this.element); }, onEnterEditMode: function() {}, onLeaveEditMode: function() {}, dispose: function() { if (this.oldInnerHTML) { this.element.innerHTML = this.oldInnerHTML; } this.leaveEditMode(); Event.stopObserving(this.element, 'click', this.onclickListener); Event.stopObserving(this.element, 'mouseover', this.mouseoverListener); Event.stopObserving(this.element, 'mouseout', this.mouseoutListener); if (this.options.externalControl) { Event.stopObserving(this.options.externalControl, 'click', this.onclickListener); Event.stopObserving(this.options.externalControl, 'mouseover', this.mouseoverListener); Event.stopObserving(this.options.externalControl, 'mouseout', this.mouseoutListener); } } }; Ajax.InPlaceCollectionEditor = Class.create(); Object.extend(Ajax.InPlaceCollectionEditor.prototype, Ajax.InPlaceEditor.prototype); Object.extend(Ajax.InPlaceCollectionEditor.prototype, { createEditField: function() { if (!this.cached_selectTag) { var selectTag = document.createElement("select"); var collection = this.options.collection || []; var optionTag; collection.each(function(e,i) { optionTag = document.createElement("option"); optionTag.value = (e instanceof Array) ? e[0] : e; if(this.options.value==optionTag.value) optionTag.selected = true; optionTag.appendChild(document.createTextNode((e instanceof Array) ? e[1] : e)); selectTag.appendChild(optionTag); }.bind(this)); this.cached_selectTag = selectTag; } this.editField = this.cached_selectTag; if(this.options.loadTextURL) this.loadExternalText(); this.form.appendChild(this.editField); this.options.callback = function(form, value) { return "value=" + encodeURIComponent(value); } } }); // Delayed observer, like Form.Element.Observer, // but waits for delay after last key input // Ideal for live-search fields Form.Element.DelayedObserver = Class.create(); Form.Element.DelayedObserver.prototype = { initialize: function(element, delay, callback) { this.delay = delay || 0.5; this.element = $(element); this.callback = callback; this.timer = null; this.lastValue = $F(this.element); Event.observe(this.element,'keyup',this.delayedListener.bindAsEventListener(this)); }, delayedListener: function(event) { if(this.lastValue == $F(this.element)) return; if(this.timer) clearTimeout(this.timer); this.timer = setTimeout(this.onTimerEvent.bind(this), this.delay * 1000); this.lastValue = $F(this.element); }, onTimerEvent: function() { this.timer = null; this.callback(this.element, $F(this.element)); } };