User:Ganiman/dragdrop.js

// script.aculo.us dragdrop.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) //          (c) 2005-2007 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz) // // script.aculo.us is freely distributable under the terms of an MIT-style license. // For details, see the script.aculo.us web site: http://script.aculo.us/

if(Object.isUndefined(Effect)) throw("dragdrop.js requires including script.aculo.us' effects.js library");

var Droppables = { drops: [],

remove: function(element) { this.drops = this.drops.reject(function(d) { return d.element==$(element) }); },

add: function(element) { element = $(element); var options = Object.extend({     greedy:     true,      hoverclass: null,      tree:       false    }, arguments[1] || { });

// cache containers if(options.containment) { options._containers = []; var containment = options.containment; if(Object.isArray(containment)) { containment.each( function(c) { options._containers.push($(c)) }); } else { options._containers.push($(containment)); }   }    if(options.accept) options.accept = [options.accept].flatten;

Element.makePositioned(element); // fix IE   options.element = element;

this.drops.push(options); }, findDeepestChild: function(drops) { deepest = drops[0]; for (i = 1; i < drops.length; ++i) if (Element.isParent(drops[i].element, deepest.element)) deepest = drops[i]; return deepest; },

isContained: function(element, drop) { var containmentNode; if(drop.tree) { containmentNode = element.treeNode; } else { containmentNode = element.parentNode; }   return drop._containers.detect(function(c) { return containmentNode == c }); }, isAffected: function(point, element, drop) { return (     (drop.element!=element) &&      ((!drop._containers) || this.isContained(element, drop)) &&     ((!drop.accept) || (Element.classNames(element).detect( function(v) { return drop.accept.include(v) } ) )) &&     Position.within(drop.element, point[0], point[1]) ); },

deactivate: function(drop) { if(drop.hoverclass) Element.removeClassName(drop.element, drop.hoverclass); this.last_active = null; },

activate: function(drop) { if(drop.hoverclass) Element.addClassName(drop.element, drop.hoverclass); this.last_active = drop; },

show: function(point, element) { if(!this.drops.length) return; var drop, affected = []; this.drops.each( function(drop) {     if(Droppables.isAffected(point, element, drop))        affected.push(drop);    }); if(affected.length>0) drop = Droppables.findDeepestChild(affected);

if(this.last_active && this.last_active != drop) this.deactivate(this.last_active); if (drop) { Position.within(drop.element, point[0], point[1]); if(drop.onHover) drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element)); if (drop != this.last_active) Droppables.activate(drop); } },

fire: function(event, element) { if(!this.last_active) return; Position.prepare;

if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active)) if (this.last_active.onDrop) { this.last_active.onDrop(element, this.last_active.element, event); return true; } },

reset: function { if(this.last_active) this.deactivate(this.last_active); } }

var Draggables = { drags: [], observers: [], register: function(draggable) { if(this.drags.length == 0) { this.eventMouseUp  = this.endDrag.bindAsEventListener(this); this.eventMouseMove = this.updateDrag.bindAsEventListener(this); this.eventKeypress = this.keyPress.bindAsEventListener(this); Event.observe(document, "mouseup", this.eventMouseUp); Event.observe(document, "mousemove", this.eventMouseMove); Event.observe(document, "keypress", this.eventKeypress); }   this.drags.push(draggable); }, unregister: function(draggable) { this.drags = this.drags.reject(function(d) { return d==draggable }); if(this.drags.length == 0) { Event.stopObserving(document, "mouseup", this.eventMouseUp); Event.stopObserving(document, "mousemove", this.eventMouseMove); Event.stopObserving(document, "keypress", this.eventKeypress); } },  activate: function(draggable) { if(draggable.options.delay) { this._timeout = setTimeout(function {        Draggables._timeout = null;         window.focus;         Draggables.activeDraggable = draggable;       }.bind(this), draggable.options.delay); } else { window.focus; // allows keypress events if window isn't currently focused, fails for Safari this.activeDraggable = draggable; } },  deactivate: function { this.activeDraggable = null; }, updateDrag: function(event) { if(!this.activeDraggable) return; var pointer = [Event.pointerX(event), Event.pointerY(event)]; // Mozilla-based browsers fire successive mousemove events with // the same coordinates, prevent needless redrawing (moz bug?) if(this._lastPointer && (this._lastPointer.inspect == pointer.inspect)) return; this._lastPointer = pointer; this.activeDraggable.updateDrag(event, pointer); }, endDrag: function(event) { if(this._timeout) { clearTimeout(this._timeout); this._timeout = null; }   if(!this.activeDraggable) return; this._lastPointer = null; this.activeDraggable.endDrag(event); this.activeDraggable = null; }, keyPress: function(event) { if(this.activeDraggable) this.activeDraggable.keyPress(event); }, addObserver: function(observer) { this.observers.push(observer); this._cacheObserverCallbacks; }, removeObserver: function(element) {  // element instead of observer fixes mem leaks this.observers = this.observers.reject( function(o) { return o.element==element }); this._cacheObserverCallbacks; }, notify: function(eventName, draggable, event) {  // 'onStart', 'onEnd', 'onDrag' if(this[eventName+'Count'] > 0) this.observers.each( function(o) {       if(o[eventName]) o[eventName](eventName, draggable, event);      }); if(draggable.options[eventName]) draggable.options[eventName](draggable, event); }, _cacheObserverCallbacks: function { ['onStart','onEnd','onDrag'].each( function(eventName) {     Draggables[eventName+'Count'] = Draggables.observers.select( function(o) { return o[eventName]; } ).length;   }); } }

/*--*/

var Draggable = Class.create({ initialize: function(element) {    var defaults = {      handle: false,      reverteffect: function(element, top_offset, left_offset) {        var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;        new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur, queue: {scope:'_draggable', position:'end'} });     },      endeffect: function(element) {        var toOpacity = Object.isNumber(element._opacity) ? element._opacity : 1.0;        new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity, queue: {scope:'_draggable', position:'end'}, afterFinish: function{ Draggable._dragging[element] = false }       });       },      zindex: 1000,      revert: false,      quiet: false,      scroll: false,      scrollSensitivity: 20,      scrollSpeed: 15,      snap: false,  // false, or xy or [x,y] or function(x,y){ return [x,y] }      delay: 0    };    if(!arguments[1] || Object.isUndefined(arguments[1].endeffect))      Object.extend(defaults, { starteffect: function(element) { element._opacity = Element.getOpacity(element); Draggable._dragging[element] = true; new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7}); }     });    var options = Object.extend(defaults, arguments[1] || { });

this.element = $(element); if(options.handle && Object.isString(options.handle)) this.handle = this.element.down('.'+options.handle, 0); if(!this.handle) this.handle = $(options.handle); if(!this.handle) this.handle = this.element; if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) { options.scroll = $(options.scroll); this._isScrollChild = Element.childOf(this.element, options.scroll); }

Element.makePositioned(this.element); // fix IE

this.options = options; this.dragging = false;

this.eventMouseDown = this.initDrag.bindAsEventListener(this); Event.observe(this.handle, "mousedown", this.eventMouseDown); Draggables.register(this); }, destroy: function { Event.stopObserving(this.handle, "mousedown", this.eventMouseDown); Draggables.unregister(this); }, currentDelta: function { return([     parseInt(Element.getStyle(this.element,'left') || '0'),      parseInt(Element.getStyle(this.element,'top') || '0')]); }, initDrag: function(event) { if(!Object.isUndefined(Draggable._dragging[this.element]) &&     Draggable._dragging[this.element]) return; if(Event.isLeftClick(event)) { // abort on form elements, fixes a Firefox issue var src = Event.element(event); if((tag_name = src.tagName.toUpperCase) && ( tag_name=='INPUT' || tag_name=='SELECT' || tag_name=='OPTION' || tag_name=='BUTTON' || tag_name=='TEXTAREA')) return; var pointer = [Event.pointerX(event), Event.pointerY(event)]; var pos    = Position.cumulativeOffset(this.element); this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) }); Draggables.activate(this); Event.stop(event); } },  startDrag: function(event) { this.dragging = true; if(!this.delta) this.delta = this.currentDelta; if(this.options.zindex) { this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0); this.element.style.zIndex = this.options.zindex; }   if(this.options.ghosting) { this._clone = this.element.cloneNode(true); this.element._originallyAbsolute = (this.element.getStyle('position') == 'absolute'); if (!this.element._originallyAbsolute) Position.absolutize(this.element); this.element.parentNode.insertBefore(this._clone, this.element); }   if(this.options.scroll) { if (this.options.scroll == window) { var where = this._getWindowScroll(this.options.scroll); this.originalScrollLeft = where.left; this.originalScrollTop = where.top; } else { this.originalScrollLeft = this.options.scroll.scrollLeft; this.originalScrollTop = this.options.scroll.scrollTop; }   }    Draggables.notify('onStart', this, event); if(this.options.starteffect) this.options.starteffect(this.element); }, updateDrag: function(event, pointer) { if(!this.dragging) this.startDrag(event); if(!this.options.quiet){ Position.prepare; Droppables.show(pointer, this.element); }   Draggables.notify('onDrag', this, event); this.draw(pointer); if(this.options.change) this.options.change(this); if(this.options.scroll) { this.stopScrolling; var p;     if (this.options.scroll == window) { with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; } } else { p = Position.page(this.options.scroll); p[0] += this.options.scroll.scrollLeft + Position.deltaX; p[1] += this.options.scroll.scrollTop + Position.deltaY; p.push(p[0]+this.options.scroll.offsetWidth); p.push(p[1]+this.options.scroll.offsetHeight); }     var speed = [0,0]; if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity); if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity); if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity); if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity); this.startScrolling(speed); }   // fix AppleWebKit rendering if(Prototype.Browser.WebKit) window.scrollBy(0,0); Event.stop(event); }, finishDrag: function(event, success) { this.dragging = false; if(this.options.quiet){ Position.prepare; var pointer = [Event.pointerX(event), Event.pointerY(event)]; Droppables.show(pointer, this.element); }

if(this.options.ghosting) { if (!this.element._originallyAbsolute) Position.relativize(this.element); delete this.element._originallyAbsolute; Element.remove(this._clone); this._clone = null; }

var dropped = false; if(success) { dropped = Droppables.fire(event, this.element); if (!dropped) dropped = false; }   if(dropped && this.options.onDropped) this.options.onDropped(this.element); Draggables.notify('onEnd', this, event);

var revert = this.options.revert; if(revert && Object.isFunction(revert)) revert = revert(this.element); var d = this.currentDelta; if(revert && this.options.reverteffect) { if (dropped == 0 || revert != 'failure') this.options.reverteffect(this.element,         d[1]-this.delta[1], d[0]-this.delta[0]); } else { this.delta = d;   }

if(this.options.zindex) this.element.style.zIndex = this.originalZ;

if(this.options.endeffect) this.options.endeffect(this.element); Draggables.deactivate(this); Droppables.reset; }, keyPress: function(event) { if(event.keyCode!=Event.KEY_ESC) return; this.finishDrag(event, false); Event.stop(event); }, endDrag: function(event) { if(!this.dragging) return; this.stopScrolling; this.finishDrag(event, true); Event.stop(event); }, draw: function(point) { var pos = Position.cumulativeOffset(this.element); if(this.options.ghosting) { var r  = Position.realOffset(this.element); pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY; }   var d = this.currentDelta; pos[0] -= d[0]; pos[1] -= d[1]; if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) { pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft; pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop; }   var p = [0,1].map(function(i){       return (point[i]-pos[i]-this.offset[i])     }.bind(this)); if(this.options.snap) { if(Object.isFunction(this.options.snap)) { p = this.options.snap(p[0],p[1],this); } else { if(Object.isArray(this.options.snap)) { p = p.map( function(v, i) {         return (v/this.options.snap[i]).round*this.options.snap[i] }.bind(this)) } else { p = p.map( function(v) {         return (v/this.options.snap).round*this.options.snap }.bind(this)) }   }}    var style = this.element.style; if((!this.options.constraint) || (this.options.constraint=='horizontal')) style.left = p[0] + "px"; if((!this.options.constraint) || (this.options.constraint=='vertical')) style.top = p[1] + "px"; if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering }, stopScrolling: function { if(this.scrollInterval) { clearInterval(this.scrollInterval); this.scrollInterval = null; Draggables._lastScrollPointer = null; } },  startScrolling: function(speed) { if(!(speed[0] || speed[1])) return; this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed]; this.lastScrolled = new Date; this.scrollInterval = setInterval(this.scroll.bind(this), 10); }, scroll: function { var current = new Date; var delta = current - this.lastScrolled; this.lastScrolled = current; if(this.options.scroll == window) { with (this._getWindowScroll(this.options.scroll)) { if (this.scrollSpeed[0] || this.scrollSpeed[1]) { var d = delta / 1000; this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] ); }     }    } else { this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000; this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000; }   Position.prepare; Droppables.show(Draggables._lastPointer, this.element); Draggables.notify('onDrag', this); if (this._isScrollChild) { Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer); Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000; Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000; if (Draggables._lastScrollPointer[0] < 0) Draggables._lastScrollPointer[0] = 0; if (Draggables._lastScrollPointer[1] < 0) Draggables._lastScrollPointer[1] = 0; this.draw(Draggables._lastScrollPointer); }   if(this.options.change) this.options.change(this); }, _getWindowScroll: function(w) { var T, L, W, H;   with (w.document) { if (w.document.documentElement && documentElement.scrollTop) { T = documentElement.scrollTop; L = documentElement.scrollLeft; } else if (w.document.body) { T = body.scrollTop; L = body.scrollLeft; }     if (w.innerWidth) { W = w.innerWidth; H = w.innerHeight; } else if (w.document.documentElement && documentElement.clientWidth) { W = documentElement.clientWidth; H = documentElement.clientHeight; } else { W = body.offsetWidth; H = body.offsetHeight }   }    return { top: T, left: L, width: W, height: H }; } });

Draggable._dragging = { };

/*--*/

var SortableObserver = Class.create({ initialize: function(element, observer) {    this.element   = $(element);    this.observer  = observer;    this.lastValue = Sortable.serialize(this.element);  },  onStart: function {    this.lastValue = Sortable.serialize(this.element);  },  onEnd: function {    Sortable.unmark;    if(this.lastValue != Sortable.serialize(this.element))      this.observer(this.element)  } });

var Sortable = { SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/, sortables: { }, _findRootElement: function(element) { while (element.tagName.toUpperCase != "BODY") { if(element.id && Sortable.sortables[element.id]) return element; element = element.parentNode; } },

options: function(element) { element = Sortable._findRootElement($(element)); if(!element) return; return Sortable.sortables[element.id]; }, destroy: function(element){ var s = Sortable.options(element); if(s) { Draggables.removeObserver(s.element); s.droppables.each(function(d){ Droppables.remove(d) }); s.draggables.invoke('destroy'); delete Sortable.sortables[s.element.id]; } },

create: function(element) { element = $(element); var options = Object.extend({      element:     element,      tag:         'li',       // assumes li children, override with tag: 'tagname'      dropOnEmpty: false,      tree:        false,      treeTag:     'ul',      overlap:     'vertical', // one of 'vertical', 'horizontal'      constraint:  'vertical', // one of 'vertical', 'horizontal', false      containment: element,    // also takes array of elements (or id's); or false      handle:      false,      // or a CSS class      only:        false,      delay:       0,      hoverclass:  null,      ghosting:    false,      quiet:       false,       scroll:      false,      scrollSensitivity: 20,      scrollSpeed: 15,      format:      this.SERIALIZE_RULE,      // these take arrays of elements or ids and can be       // used for better initialization performance      elements:    false,      handles:     false,      onChange:    Prototype.emptyFunction, onUpdate:   Prototype.emptyFunction }, arguments[1] || { });

// clear any old sortable with same element this.destroy(element);

// build options for the draggables var options_for_draggable = { revert:     true, quiet:      options.quiet, scroll:     options.scroll, scrollSpeed: options.scrollSpeed, scrollSensitivity: options.scrollSensitivity, delay:      options.delay, ghosting:   options.ghosting, constraint: options.constraint, handle:     options.handle };

if(options.starteffect) options_for_draggable.starteffect = options.starteffect;

if(options.reverteffect) options_for_draggable.reverteffect = options.reverteffect; else if(options.ghosting) options_for_draggable.reverteffect = function(element) { element.style.top = 0; element.style.left = 0; };

if(options.endeffect) options_for_draggable.endeffect = options.endeffect;

if(options.zindex) options_for_draggable.zindex = options.zindex;

// build options for the droppables var options_for_droppable = { overlap:    options.overlap, containment: options.containment, tree:       options.tree, hoverclass: options.hoverclass, onHover:    Sortable.onHover }   var options_for_tree = { onHover:     Sortable.onEmptyHover, overlap:     options.overlap, containment: options.containment, hoverclass:  options.hoverclass }

// fix for gecko engine Element.cleanWhitespace(element);

options.draggables = []; options.droppables = [];

// drop on empty handling if(options.dropOnEmpty || options.tree) { Droppables.add(element, options_for_tree); options.droppables.push(element); }

(options.elements || this.findElements(element, options) || []).each( function(e,i) {     var handle = options.handles ? $(options.handles[i]) :        (options.handle ? $(e).select('.' + options.handle)[0] : e);      options.draggables.push( new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));     Droppables.add(e, options_for_droppable);      if(options.tree) e.treeNode = element;      options.droppables.push(e);          }); if(options.tree) { (Sortable.findTreeElements(element, options) || []).each( function(e) {       Droppables.add(e, options_for_tree);        e.treeNode = element;        options.droppables.push(e);      }); }

// keep reference this.sortables[element.id] = options;

// for onupdate Draggables.addObserver(new SortableObserver(element, options.onUpdate));

},

// return all suitable-for-sortable elements in a guaranteed order findElements: function(element, options) { return Element.findChildren(     element, options.only, options.tree ? true : false, options.tag); }, findTreeElements: function(element, options) { return Element.findChildren(     element, options.only, options.tree ? true : false, options.treeTag); },

onHover: function(element, dropon, overlap) { if(Element.isParent(dropon, element)) return;

if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) { return; } else if(overlap>0.5) { Sortable.mark(dropon, 'before'); if(dropon.previousSibling != element) { var oldParentNode = element.parentNode; element.style.visibility = "hidden"; // fix gecko rendering dropon.parentNode.insertBefore(element, dropon); if(dropon.parentNode!=oldParentNode) Sortable.options(oldParentNode).onChange(element); Sortable.options(dropon.parentNode).onChange(element); }   } else { Sortable.mark(dropon, 'after'); var nextElement = dropon.nextSibling || null; if(nextElement != element) { var oldParentNode = element.parentNode; element.style.visibility = "hidden"; // fix gecko rendering dropon.parentNode.insertBefore(element, nextElement); if(dropon.parentNode!=oldParentNode) Sortable.options(oldParentNode).onChange(element); Sortable.options(dropon.parentNode).onChange(element); }   }  },  onEmptyHover: function(element, dropon, overlap) { var oldParentNode = element.parentNode; var droponOptions = Sortable.options(dropon); if(!Element.isParent(dropon, element)) { var index; var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only}); var child = null; if(children) { var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap); for (index = 0; index < children.length; index += 1) { if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) { offset -= Element.offsetSize (children[index], droponOptions.overlap); } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) { child = index + 1 < children.length ? children[index + 1] : null; break; } else { child = children[index]; break; }       }      }      dropon.insertBefore(element, child); Sortable.options(oldParentNode).onChange(element); droponOptions.onChange(element); } },

unmark: function { if(Sortable._marker) Sortable._marker.hide; },

mark: function(dropon, position) { // mark on ghosting only var sortable = Sortable.options(dropon.parentNode); if(sortable && !sortable.ghosting) return;

if(!Sortable._marker) { Sortable._marker = ($('dropmarker') || Element.extend(document.createElement('DIV'))). hide.addClassName('dropmarker').setStyle({position:'absolute'}); document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); }       var offsets = Position.cumulativeOffset(dropon); Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'}); if(position=='after') if(sortable.overlap == 'horizontal') Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'}); else Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'}); Sortable._marker.show; }, _tree: function(element, options, parent) { var children = Sortable.findElements(element, options) || []; for (var i = 0; i < children.length; ++i) { var match = children[i].id.match(options.format);

if (!match) continue; var child = { id: encodeURIComponent(match ? match[1] : null), element: element, parent: parent, children: [], position: parent.children.length, container: $(children[i]).down(options.treeTag) }     /* Get the element containing the children and recurse over it */ if (child.container) this._tree(child.container, options, child) parent.children.push (child); }

return parent; },

tree: function(element) { element = $(element); var sortableOptions = this.options(element); var options = Object.extend({     tag: sortableOptions.tag,      treeTag: sortableOptions.treeTag,      only: sortableOptions.only,      name: element.id,      format: sortableOptions.format    }, arguments[1] || { }); var root = { id: null, parent: null, children: [], container: element, position: 0 }   return Sortable._tree(element, options, root); },

/* Construct a [i] index for a particular node */ _constructIndex: function(node) { var index = ''; do { if (node.id) index = '[' + node.position + ']' + index; } while ((node = node.parent) != null); return index; },

sequence: function(element) { element = $(element); var options = Object.extend(this.options(element), arguments[1] || { }); return $(this.findElements(element, options) || []).map( function(item) {     return item.id.match(options.format) ? item.id.match(options.format)[1] : '';    }); },

setSequence: function(element, new_sequence) { element = $(element); var options = Object.extend(this.options(element), arguments[2] || { }); var nodeMap = { }; this.findElements(element, options).each( function(n) {       if (n.id.match(options.format))            nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];        n.parentNode.removeChild(n);    }); new_sequence.each(function(ident) {     var n = nodeMap[ident];      if (n) {        n[1].appendChild(n[0]);        delete nodeMap[ident];      }    }); }, serialize: function(element) { element = $(element); var options = Object.extend(Sortable.options(element), arguments[1] || { }); var name = encodeURIComponent(     (arguments[1] && arguments[1].name) ? arguments[1].name : element.id); if (options.tree) { return Sortable.tree(element, arguments[1]).children.map( function (item) {       return [name + Sortable._constructIndex(item) + "[id]=" +                 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));      }).flatten.join('&'); } else { return Sortable.sequence(element, arguments[1]).map( function(item) {       return name + "[]=" + encodeURIComponent(item);      }).join('&'); } } }

// Returns true if child is contained within element Element.isParent = function(child, element) { if (!child.parentNode || child == element) return false; if (child.parentNode == element) return true; return Element.isParent(child.parentNode, element); }

Element.findChildren = function(element, only, recursive, tagName) { if(!element.hasChildNodes) return null; tagName = tagName.toUpperCase; if(only) only = [only].flatten; var elements = []; $A(element.childNodes).each( function(e) {   if(e.tagName && e.tagName.toUpperCase==tagName && (!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))       elements.push(e);    if(recursive) {      var grandchildren = Element.findChildren(e, only, recursive, tagName);      if(grandchildren) elements.push(grandchildren);    }  });

return (elements.length>0 ? elements.flatten : []); }

Element.offsetSize = function (element, type) { return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')]; }