From d25124264c5fc11612eee640a7ef568ed08d7db6 Mon Sep 17 00:00:00 2001 From: Drew Crampsie Date: Wed, 31 Aug 2005 14:40:59 -0700 Subject: [PATCH] Added AJAX support Added support for an Ajax autocomplete component. darcs-hash:20050831214059-5417e-b5055045e977f0eccc2f700e4d42fbaf1735fbbb.gz --- lisp-on-lines.asd | 3 +- src/mewa/slot-presentations.lisp | 62 ++ src/packages.lisp | 4 +- wwwroot/prototype-1.3.1.js | 1038 ++++++++++++++++++++++++++++++ 4 files changed, 1105 insertions(+), 2 deletions(-) create mode 100644 wwwroot/prototype-1.3.1.js diff --git a/lisp-on-lines.asd b/lisp-on-lines.asd index 937f5e0..ebcdcfa 100644 --- a/lisp-on-lines.asd +++ b/lisp-on-lines.asd @@ -39,5 +39,6 @@ :components ((:file "lisp-on-lines"))) (:module :components :pathname "src/components/" - :components ((:file "range-list")))) + :components ((:file "range-list") + (:file "ajax")))) :depends-on (:meta-model :mewa)) diff --git a/src/mewa/slot-presentations.lisp b/src/mewa/slot-presentations.lisp index 4254227..1454c53 100644 --- a/src/mewa/slot-presentations.lisp +++ b/src/mewa/slot-presentations.lisp @@ -201,6 +201,68 @@ When T, only the default value for primary keys and the joins are updated.") ;; presentation is used only for rendering (render)))) + +;;;; * AJAX stuff + +;;;; TODO: This search stuff should probably me refactored elsewhere + +(defmethod find-slots-of-type (model &key (type 'string) + (types '((string)) types-supplied-p)) + "returns a list of slots matching TYPE, or matching any of TYPES" + (let (ty) + (if types-supplied-p + (setf ty types) + (setf ty (list type))) + (remove nil (mapcar #'(lambda (st) (when (member (second st) ty) + (first st))) + (lisp-on-lines::list-slot-types model))))) + +(defslot-presentation ajax-foreign-key-slot-presentation (foreign-key-slot-presentation) + ((search-slots :accessor search-slots :initarg :search-slots :initform nil) + (live-search + :accessor live-search + :component (lisp-on-lines:auto-complete + :values-generator + (lambda (value) + (when (< 0 (length value)) + (limited-word-search 'person '(first-name last-name company-name) (list value)))) + + :render (lambda (x) + (<:as-html (if (> (length (last-name x)) 0) + (strcat (last-name x) ", ") + " ") + (first-name x)" " (company-name x))) + :as-value (lambda (x) x) + :submit-on-click-p nil))) + (:type-name ajax-foreign-key)) + + +(defmethod shared-initialize :after ((slot ajax-foreign-key-slot-presentation) slots &rest args) + ;; If no search-slots than use the any slots of type string + (unless (search-slots slot) + (setf (search-slots slot) t) + (let ((l (live-search slot))) + (setf (lisp-on-lines::values-generator l) t)))) + + +(defmethod present-slot :around ((slot ajax-foreign-key-slot-presentation) instance) + (setf (foreign-instance slot) + (when (presentation-slot-value slot instance) + (meta-model:explode-foreign-key instance (slot-name slot)))) + (flet ((render () (when (foreign-instance slot)(call-next-method)))) + (if (slot-boundp slot 'place) + (cond + ((editablep slot) + + ( + * + * THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff + * against the source tree, available from the Prototype darcs repository. + * + * Prototype is freely distributable under the terms of an MIT-style license. + * + * For details, see the Prototype web site: http://prototype.conio.net/ + * +/*--------------------------------------------------------------------------*/ + +var Prototype = { + Version: '1.3.1', + emptyFunction: function() {} +} + +var Class = { + create: function() { + return function() { + this.initialize.apply(this, arguments); + } + } +} + +var Abstract = new Object(); + +Object.extend = function(destination, source) { + for (property in source) { + destination[property] = source[property]; + } + return destination; +} + +Object.prototype.extend = function(object) { + return Object.extend.apply(this, [this, object]); +} + +Function.prototype.bind = function(object) { + var __method = this; + return function() { + __method.apply(object, arguments); + } +} + +Function.prototype.bindAsEventListener = function(object) { + var __method = this; + return function(event) { + __method.call(object, event || window.event); + } +} + +Number.prototype.toColorPart = function() { + var digits = this.toString(16); + if (this < 16) return '0' + digits; + return digits; +} + +var Try = { + these: function() { + var returnValue; + + for (var i = 0; i < arguments.length; i++) { + var lambda = arguments[i]; + try { + returnValue = lambda(); + break; + } catch (e) {} + } + + return returnValue; + } +} + +/*--------------------------------------------------------------------------*/ + +var PeriodicalExecuter = Class.create(); +PeriodicalExecuter.prototype = { + initialize: function(callback, frequency) { + this.callback = callback; + this.frequency = frequency; + this.currentlyExecuting = false; + + this.registerCallback(); + }, + + registerCallback: function() { + setInterval(this.onTimerEvent.bind(this), this.frequency * 1000); + }, + + onTimerEvent: function() { + if (!this.currentlyExecuting) { + try { + this.currentlyExecuting = true; + this.callback(); + } finally { + this.currentlyExecuting = false; + } + } + } +} + +/*--------------------------------------------------------------------------*/ + +function $() { + var elements = new Array(); + + for (var i = 0; i < arguments.length; i++) { + var element = arguments[i]; + if (typeof element == 'string') + element = document.getElementById(element); + + if (arguments.length == 1) + return element; + + elements.push(element); + } + + return elements; +} + +if (!Array.prototype.push) { + Array.prototype.push = function() { + var startLength = this.length; + for (var i = 0; i < arguments.length; i++) + this[startLength + i] = arguments[i]; + return this.length; + } +} + +if (!Function.prototype.apply) { + // Based on code from http://www.youngpup.net/ + Function.prototype.apply = function(object, parameters) { + var parameterStrings = new Array(); + if (!object) object = window; + if (!parameters) parameters = new Array(); + + for (var i = 0; i < parameters.length; i++) + parameterStrings[i] = 'parameters[' + i + ']'; + + object.__apply__ = this; + var result = eval('object.__apply__(' + + parameterStrings.join(', ') + ')'); + object.__apply__ = null; + + return result; + } +} + +String.prototype.extend({ + stripTags: function() { + return this.replace(/<\/?[^>]+>/gi, ''); + }, + + escapeHTML: function() { + var div = document.createElement('div'); + var text = document.createTextNode(this); + div.appendChild(text); + return div.innerHTML; + }, + + unescapeHTML: function() { + var div = document.createElement('div'); + div.innerHTML = this.stripTags(); + return div.childNodes[0].nodeValue; + } +}); + +var Ajax = { + getTransport: function() { + return Try.these( + function() {return new ActiveXObject('Msxml2.XMLHTTP')}, + function() {return new ActiveXObject('Microsoft.XMLHTTP')}, + function() {return new XMLHttpRequest()} + ) || false; + } +} + +Ajax.Base = function() {}; +Ajax.Base.prototype = { + setOptions: function(options) { + this.options = { + method: 'post', + asynchronous: true, + parameters: '' + }.extend(options || {}); + }, + + responseIsSuccess: function() { + return this.transport.status == undefined + || this.transport.status == 0 + || (this.transport.status >= 200 && this.transport.status < 300); + }, + + responseIsFailure: function() { + return !this.responseIsSuccess(); + } +} + +Ajax.Request = Class.create(); +Ajax.Request.Events = + ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete']; + +Ajax.Request.prototype = (new Ajax.Base()).extend({ + initialize: function(url, options) { + this.transport = Ajax.getTransport(); + this.setOptions(options); + this.request(url); + }, + + request: function(url) { + var parameters = this.options.parameters || ''; + if (parameters.length > 0) parameters += '&_='; + + try { + if (this.options.method == 'get') + url += '?' + parameters; + + this.transport.open(this.options.method, url, + this.options.asynchronous); + + if (this.options.asynchronous) { + this.transport.onreadystatechange = this.onStateChange.bind(this); + setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10); + } + + this.setRequestHeaders(); + + var body = this.options.postBody ? this.options.postBody : parameters; + this.transport.send(this.options.method == 'post' ? body : null); + + } catch (e) { + } + }, + + setRequestHeaders: function() { + var requestHeaders = + ['X-Requested-With', 'XMLHttpRequest', + 'X-Prototype-Version', Prototype.Version]; + + if (this.options.method == 'post') { + requestHeaders.push('Content-type', + 'application/x-www-form-urlencoded'); + + /* Force "Connection: close" for Mozilla browsers to work around + * a bug where XMLHttpReqeuest sends an incorrect Content-length + * header. See Mozilla Bugzilla #246651. + */ + if (this.transport.overrideMimeType) + requestHeaders.push('Connection', 'close'); + } + + if (this.options.requestHeaders) + requestHeaders.push.apply(requestHeaders, this.options.requestHeaders); + + for (var i = 0; i < requestHeaders.length; i += 2) + this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]); + }, + + onStateChange: function() { + var readyState = this.transport.readyState; + if (readyState != 1) + this.respondToReadyState(this.transport.readyState); + }, + + respondToReadyState: function(readyState) { + var event = Ajax.Request.Events[readyState]; + + if (event == 'Complete') + (this.options['on' + this.transport.status] + || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')] + || Prototype.emptyFunction)(this.transport); + + (this.options['on' + event] || Prototype.emptyFunction)(this.transport); + + /* Avoid memory leak in MSIE: clean up the oncomplete event handler */ + if (event == 'Complete') + this.transport.onreadystatechange = Prototype.emptyFunction; + } +}); + +Ajax.Updater = Class.create(); +Ajax.Updater.ScriptFragment = '(?:)((\n|.)*?)(?:<\/script>)'; + +Ajax.Updater.prototype.extend(Ajax.Request.prototype).extend({ + initialize: function(container, url, options) { + this.containers = { + success: container.success ? $(container.success) : $(container), + failure: container.failure ? $(container.failure) : + (container.success ? null : $(container)) + } + + this.transport = Ajax.getTransport(); + this.setOptions(options); + + var onComplete = this.options.onComplete || Prototype.emptyFunction; + this.options.onComplete = (function() { + this.updateContent(); + onComplete(this.transport); + }).bind(this); + + this.request(url); + }, + + updateContent: function() { + var receiver = this.responseIsSuccess() ? + this.containers.success : this.containers.failure; + + var match = new RegExp(Ajax.Updater.ScriptFragment, 'img'); + var response = this.transport.responseText.replace(match, ''); + var scripts = this.transport.responseText.match(match); + + if (receiver) { + if (this.options.insertion) { + new this.options.insertion(receiver, response); + } else { + receiver.innerHTML = response; + } + } + + if (this.responseIsSuccess()) { + if (this.onComplete) + setTimeout((function() {this.onComplete( + this.transport)}).bind(this), 10); + } + + if (this.options.evalScripts && scripts) { + match = new RegExp(Ajax.Updater.ScriptFragment, 'im'); + setTimeout((function() { + for (var i = 0; i < scripts.length; i++) + eval(scripts[i].match(match)[1]); + }).bind(this), 10); + } + } +}); + +Ajax.PeriodicalUpdater = Class.create(); +Ajax.PeriodicalUpdater.prototype = (new Ajax.Base()).extend({ + initialize: function(container, url, options) { + this.setOptions(options); + this.onComplete = this.options.onComplete; + + this.frequency = (this.options.frequency || 2); + this.decay = 1; + + this.updater = {}; + this.container = container; + this.url = url; + + this.start(); + }, + + start: function() { + this.options.onComplete = this.updateComplete.bind(this); + this.onTimerEvent(); + }, + + stop: function() { + this.updater.onComplete = undefined; + clearTimeout(this.timer); + (this.onComplete || Ajax.emptyFunction).apply(this, arguments); + }, + + updateComplete: function(request) { + if (this.options.decay) { + this.decay = (request.responseText == this.lastText ? + this.decay * this.options.decay : 1); + + this.lastText = request.responseText; + } + this.timer = setTimeout(this.onTimerEvent.bind(this), + this.decay * this.frequency * 1000); + }, + + onTimerEvent: function() { + this.updater = new Ajax.Updater(this.container, this.url, this.options); + } +}); + +document.getElementsByClassName = function(className) { + var children = document.getElementsByTagName('*') || document.all; + var elements = new Array(); + + for (var i = 0; i < children.length; i++) { + var child = children[i]; + var classNames = child.className.split(' '); + for (var j = 0; j < classNames.length; j++) { + if (classNames[j] == className) { + elements.push(child); + break; + } + } + } + + return elements; +} + +/*--------------------------------------------------------------------------*/ + +if (!window.Element) { + var Element = new Object(); +} + +Object.extend(Element, { + toggle: function() { + for (var i = 0; i < arguments.length; i++) { + var element = $(arguments[i]); + element.style.display = + (element.style.display == 'none' ? '' : 'none'); + } + }, + + hide: function() { + for (var i = 0; i < arguments.length; i++) { + var element = $(arguments[i]); + element.style.display = 'none'; + } + }, + + show: function() { + for (var i = 0; i < arguments.length; i++) { + var element = $(arguments[i]); + element.style.display = ''; + } + }, + + remove: function(element) { + element = $(element); + element.parentNode.removeChild(element); + }, + + getHeight: function(element) { + element = $(element); + return element.offsetHeight; + }, + + hasClassName: function(element, className) { + element = $(element); + if (!element) + return; + var a = element.className.split(' '); + for (var i = 0; i < a.length; i++) { + if (a[i] == className) + return true; + } + return false; + }, + + addClassName: function(element, className) { + element = $(element); + Element.removeClassName(element, className); + element.className += ' ' + className; + }, + + removeClassName: function(element, className) { + element = $(element); + if (!element) + return; + var newClassName = ''; + var a = element.className.split(' '); + for (var i = 0; i < a.length; i++) { + if (a[i] != className) { + if (i > 0) + newClassName += ' '; + newClassName += a[i]; + } + } + element.className = newClassName; + }, + + // removes whitespace-only text node children + cleanWhitespace: function(element) { + var element = $(element); + for (var i = 0; i < element.childNodes.length; i++) { + var node = element.childNodes[i]; + if (node.nodeType == 3 && !/\S/.test(node.nodeValue)) + Element.remove(node); + } + } +}); + +var Toggle = new Object(); +Toggle.display = Element.toggle; + +/*--------------------------------------------------------------------------*/ + +Abstract.Insertion = function(adjacency) { + this.adjacency = adjacency; +} + +Abstract.Insertion.prototype = { + initialize: function(element, content) { + this.element = $(element); + this.content = content; + + if (this.adjacency && this.element.insertAdjacentHTML) { + this.element.insertAdjacentHTML(this.adjacency, this.content); + } else { + this.range = this.element.ownerDocument.createRange(); + if (this.initializeRange) this.initializeRange(); + this.fragment = this.range.createContextualFragment(this.content); + this.insertContent(); + } + } +} + +var Insertion = new Object(); + +Insertion.Before = Class.create(); +Insertion.Before.prototype = (new Abstract.Insertion('beforeBegin')).extend({ + initializeRange: function() { + this.range.setStartBefore(this.element); + }, + + insertContent: function() { + this.element.parentNode.insertBefore(this.fragment, this.element); + } +}); + +Insertion.Top = Class.create(); +Insertion.Top.prototype = (new Abstract.Insertion('afterBegin')).extend({ + initializeRange: function() { + this.range.selectNodeContents(this.element); + this.range.collapse(true); + }, + + insertContent: function() { + this.element.insertBefore(this.fragment, this.element.firstChild); + } +}); + +Insertion.Bottom = Class.create(); +Insertion.Bottom.prototype = (new Abstract.Insertion('beforeEnd')).extend({ + initializeRange: function() { + this.range.selectNodeContents(this.element); + this.range.collapse(this.element); + }, + + insertContent: function() { + this.element.appendChild(this.fragment); + } +}); + +Insertion.After = Class.create(); +Insertion.After.prototype = (new Abstract.Insertion('afterEnd')).extend({ + initializeRange: function() { + this.range.setStartAfter(this.element); + }, + + insertContent: function() { + this.element.parentNode.insertBefore(this.fragment, + this.element.nextSibling); + } +}); + +var Field = { + clear: function() { + for (var i = 0; i < arguments.length; i++) + $(arguments[i]).value = ''; + }, + + focus: function(element) { + $(element).focus(); + }, + + present: function() { + for (var i = 0; i < arguments.length; i++) + if ($(arguments[i]).value == '') return false; + return true; + }, + + select: function(element) { + $(element).select(); + }, + + activate: function(element) { + $(element).focus(); + $(element).select(); + } +} + +/*--------------------------------------------------------------------------*/ + +var Form = { + serialize: function(form) { + var elements = Form.getElements($(form)); + var queryComponents = new Array(); + + for (var i = 0; i < elements.length; i++) { + var queryComponent = Form.Element.serialize(elements[i]); + if (queryComponent) + queryComponents.push(queryComponent); + } + + return queryComponents.join('&'); + }, + + getElements: function(form) { + var form = $(form); + var elements = new Array(); + + for (tagName in Form.Element.Serializers) { + var tagElements = form.getElementsByTagName(tagName); + for (var j = 0; j < tagElements.length; j++) + elements.push(tagElements[j]); + } + return elements; + }, + + getInputs: function(form, typeName, name) { + var form = $(form); + var inputs = form.getElementsByTagName('input'); + + if (!typeName && !name) + return inputs; + + var matchingInputs = new Array(); + for (var i = 0; i < inputs.length; i++) { + var input = inputs[i]; + if ((typeName && input.type != typeName) || + (name && input.name != name)) + continue; + matchingInputs.push(input); + } + + return matchingInputs; + }, + + disable: function(form) { + var elements = Form.getElements(form); + for (var i = 0; i < elements.length; i++) { + var element = elements[i]; + element.blur(); + element.disabled = 'true'; + } + }, + + enable: function(form) { + var elements = Form.getElements(form); + for (var i = 0; i < elements.length; i++) { + var element = elements[i]; + element.disabled = ''; + } + }, + + focusFirstElement: function(form) { + var form = $(form); + var elements = Form.getElements(form); + for (var i = 0; i < elements.length; i++) { + var element = elements[i]; + if (element.type != 'hidden' && !element.disabled) { + Field.activate(element); + break; + } + } + }, + + reset: function(form) { + $(form).reset(); + } +} + +Form.Element = { + serialize: function(element) { + var element = $(element); + var method = element.tagName.toLowerCase(); + var parameter = Form.Element.Serializers[method](element); + + if (parameter) + return encodeURIComponent(parameter[0]) + '=' + + encodeURIComponent(parameter[1]); + }, + + getValue: function(element) { + var element = $(element); + var method = element.tagName.toLowerCase(); + var parameter = Form.Element.Serializers[method](element); + + if (parameter) + return parameter[1]; + } +} + +Form.Element.Serializers = { + input: function(element) { + switch (element.type.toLowerCase()) { + case 'submit': + case 'hidden': + case 'password': + case 'text': + return Form.Element.Serializers.textarea(element); + case 'checkbox': + case 'radio': + return Form.Element.Serializers.inputSelector(element); + } + return false; + }, + + inputSelector: function(element) { + if (element.checked) + return [element.name, element.value]; + }, + + textarea: function(element) { + return [element.name, element.value]; + }, + + select: function(element) { + var value = ''; + if (element.type == 'select-one') { + var index = element.selectedIndex; + if (index >= 0) + value = element.options[index].value || element.options[index].text; + } else { + value = new Array(); + for (var i = 0; i < element.length; i++) { + var opt = element.options[i]; + if (opt.selected) + value.push(opt.value || opt.text); + } + } + return [element.name, value]; + } +} + +/*--------------------------------------------------------------------------*/ + +var $F = Form.Element.getValue; + +/*--------------------------------------------------------------------------*/ + +Abstract.TimedObserver = function() {} +Abstract.TimedObserver.prototype = { + initialize: function(element, frequency, callback) { + this.frequency = frequency; + this.element = $(element); + this.callback = callback; + + this.lastValue = this.getValue(); + this.registerCallback(); + }, + + registerCallback: function() { + setInterval(this.onTimerEvent.bind(this), this.frequency * 1000); + }, + + onTimerEvent: function() { + var value = this.getValue(); + if (this.lastValue != value) { + this.callback(this.element, value); + this.lastValue = value; + } + } +} + +Form.Element.Observer = Class.create(); +Form.Element.Observer.prototype = (new Abstract.TimedObserver()).extend({ + getValue: function() { + return Form.Element.getValue(this.element); + } +}); + +Form.Observer = Class.create(); +Form.Observer.prototype = (new Abstract.TimedObserver()).extend({ + getValue: function() { + return Form.serialize(this.element); + } +}); + +/*--------------------------------------------------------------------------*/ + +Abstract.EventObserver = function() {} +Abstract.EventObserver.prototype = { + initialize: function(element, callback) { + this.element = $(element); + this.callback = callback; + + this.lastValue = this.getValue(); + if (this.element.tagName.toLowerCase() == 'form') + this.registerFormCallbacks(); + else + this.registerCallback(this.element); + }, + + onElementEvent: function() { + var value = this.getValue(); + if (this.lastValue != value) { + this.callback(this.element, value); + this.lastValue = value; + } + }, + + registerFormCallbacks: function() { + var elements = Form.getElements(this.element); + for (var i = 0; i < elements.length; i++) + this.registerCallback(elements[i]); + }, + + registerCallback: function(element) { + if (element.type) { + switch (element.type.toLowerCase()) { + case 'checkbox': + case 'radio': + element.target = this; + element.prev_onclick = element.onclick || Prototype.emptyFunction; + element.onclick = function() { + this.prev_onclick(); + this.target.onElementEvent(); + } + break; + case 'password': + case 'text': + case 'textarea': + case 'select-one': + case 'select-multiple': + element.target = this; + element.prev_onchange = element.onchange || Prototype.emptyFunction; + element.onchange = function() { + this.prev_onchange(); + this.target.onElementEvent(); + } + break; + } + } + } +} + +Form.Element.EventObserver = Class.create(); +Form.Element.EventObserver.prototype = (new Abstract.EventObserver()).extend({ + getValue: function() { + return Form.Element.getValue(this.element); + } +}); + +Form.EventObserver = Class.create(); +Form.EventObserver.prototype = (new Abstract.EventObserver()).extend({ + getValue: function() { + return Form.serialize(this.element); + } +}); + + +if (!window.Event) { + var Event = new Object(); +} + +Object.extend(Event, { + KEY_BACKSPACE: 8, + KEY_TAB: 9, + KEY_RETURN: 13, + KEY_ESC: 27, + KEY_LEFT: 37, + KEY_UP: 38, + KEY_RIGHT: 39, + KEY_DOWN: 40, + KEY_DELETE: 46, + + element: function(event) { + return event.target || event.srcElement; + }, + + isLeftClick: function(event) { + return (((event.which) && (event.which == 1)) || + ((event.button) && (event.button == 1))); + }, + + pointerX: function(event) { + return event.pageX || (event.clientX + + (document.documentElement.scrollLeft || document.body.scrollLeft)); + }, + + pointerY: function(event) { + return event.pageY || (event.clientY + + (document.documentElement.scrollTop || document.body.scrollTop)); + }, + + stop: function(event) { + if (event.preventDefault) { + event.preventDefault(); + event.stopPropagation(); + } else { + event.returnValue = false; + } + }, + + // find the first node with the given tagName, starting from the + // node the event was triggered on; traverses the DOM upwards + findElement: function(event, tagName) { + var element = Event.element(event); + while (element.parentNode && (!element.tagName || + (element.tagName.toUpperCase() != tagName.toUpperCase()))) + element = element.parentNode; + return element; + }, + + observers: false, + + _observeAndCache: function(element, name, observer, useCapture) { + if (!this.observers) this.observers = []; + if (element.addEventListener) { + this.observers.push([element, name, observer, useCapture]); + element.addEventListener(name, observer, useCapture); + } else if (element.attachEvent) { + this.observers.push([element, name, observer, useCapture]); + element.attachEvent('on' + name, observer); + } + }, + + unloadCache: function() { + if (!Event.observers) return; + for (var i = 0; i < Event.observers.length; i++) { + Event.stopObserving.apply(this, Event.observers[i]); + Event.observers[i][0] = null; + } + Event.observers = false; + }, + + observe: function(element, name, observer, useCapture) { + var element = $(element); + useCapture = useCapture || false; + + if (name == 'keypress' && + ((navigator.appVersion.indexOf('AppleWebKit') > 0) + || element.attachEvent)) + name = 'keydown'; + + this._observeAndCache(element, name, observer, useCapture); + }, + + stopObserving: function(element, name, observer, useCapture) { + var element = $(element); + useCapture = useCapture || false; + + if (name == 'keypress' && + ((navigator.appVersion.indexOf('AppleWebKit') > 0) + || element.detachEvent)) + name = 'keydown'; + + if (element.removeEventListener) { + element.removeEventListener(name, observer, useCapture); + } else if (element.detachEvent) { + element.detachEvent('on' + name, observer); + } + } +}); + +/* prevent memory leaks in IE */ +Event.observe(window, 'unload', Event.unloadCache, false); + +var Position = { + + // set to true if needed, warning: firefox performance problems + // NOT neeeded for page scrolling, only if draggable contained in + // scrollable elements + includeScrollOffsets: false, + + // must be called before calling withinIncludingScrolloffset, every time the + // page is scrolled + prepare: function() { + this.deltaX = window.pageXOffset + || document.documentElement.scrollLeft + || document.body.scrollLeft + || 0; + this.deltaY = window.pageYOffset + || document.documentElement.scrollTop + || document.body.scrollTop + || 0; + }, + + realOffset: function(element) { + var valueT = 0, valueL = 0; + do { + valueT += element.scrollTop || 0; + valueL += element.scrollLeft || 0; + element = element.parentNode; + } while (element); + return [valueL, valueT]; + }, + + cumulativeOffset: function(element) { + var valueT = 0, valueL = 0; + do { + valueT += element.offsetTop || 0; + valueL += element.offsetLeft || 0; + element = element.offsetParent; + } while (element); + return [valueL, valueT]; + }, + + // caches x/y coordinate pair to use with overlap + within: function(element, x, y) { + if (this.includeScrollOffsets) + return this.withinIncludingScrolloffsets(element, x, y); + this.xcomp = x; + this.ycomp = y; + this.offset = this.cumulativeOffset(element); + + return (y >= this.offset[1] && + y < this.offset[1] + element.offsetHeight && + x >= this.offset[0] && + x < this.offset[0] + element.offsetWidth); + }, + + withinIncludingScrolloffsets: function(element, x, y) { + var offsetcache = this.realOffset(element); + + this.xcomp = x + offsetcache[0] - this.deltaX; + this.ycomp = y + offsetcache[1] - this.deltaY; + this.offset = this.cumulativeOffset(element); + + return (this.ycomp >= this.offset[1] && + this.ycomp < this.offset[1] + element.offsetHeight && + this.xcomp >= this.offset[0] && + this.xcomp < this.offset[0] + element.offsetWidth); + }, + + // within must be called directly before + overlap: function(mode, element) { + if (!mode) return 0; + if (mode == 'vertical') + return ((this.offset[1] + element.offsetHeight) - this.ycomp) / + element.offsetHeight; + if (mode == 'horizontal') + return ((this.offset[0] + element.offsetWidth) - this.xcomp) / + element.offsetWidth; + }, + + clone: function(source, target) { + source = $(source); + target = $(target); + target.style.position = 'absolute'; + var offsets = this.cumulativeOffset(source); + target.style.top = offsets[1] + 'px'; + target.style.left = offsets[0] + 'px'; + target.style.width = source.offsetWidth + 'px'; + target.style.height = source.offsetHeight + 'px'; + } +} -- 2.20.1