replace image cropping library

1 files changed, 0 insertions, 915 deletions

diff --git a/library/cropper/lib/dragdrop.js b/library/cropper/lib/dragdrop.js
deleted file mode 100644
index be2a30f53..000000000
--- a/library/cropper/lib/dragdrop.js
+++ /dev/null
@@ -1,915 +0,0 @@
-// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
-//           (c) 2005 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz)
-// 
-// See scriptaculous.js for full license.
-
-/*--------------------------------------------------------------------------*/
-
-var Droppables = {
-  drops: [],
-
-  remove: function(element) {
-    this.drops = this.drops.reject(function(d) { return d.element==$(element) });
-  },
-
-  add: function(element) {
-    element = $(element);
-    var options = Object.extend({
-      greedy:     true,
-      hoverclass: null,
-      tree:       false
-    }, arguments[1] || {});
-
-    // cache containers
-    if(options.containment) {
-      options._containers = [];
-      var containment = options.containment;
-      if((typeof containment == 'object') && 
-        (containment.constructor == Array)) {
-        containment.each( function(c) { options._containers.push($(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 affected = [];
-    
-    if(this.last_active) this.deactivate(this.last_active);
-    this.drops.each( function(drop) {
-      if(Droppables.isAffected(point, element, drop))
-        affected.push(drop);
-    });
-        
-    if(affected.length>0) {
-      drop = Droppables.findDeepestChild(affected);
-      Position.within(drop.element, point[0], point[1]);
-      if(drop.onHover)
-        drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));
-      
-      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);
-  },
-
-  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) {
-    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.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);
-      });
-  },
-  
-  _cacheObserverCallbacks: function() {
-    ['onStart','onEnd','onDrag'].each( function(eventName) {
-      Draggables[eventName+'Count'] = Draggables.observers.select(
-        function(o) { return o[eventName]; }
-      ).length;
-    });
-  }
-}
-
-/*--------------------------------------------------------------------------*/
-
-var Draggable = Class.create();
-Draggable.prototype = {
-  initialize: function(element) {
-    var options = Object.extend({
-      handle: false,
-      starteffect: function(element) {
-        element._opacity = Element.getOpacity(element); 
-        new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7}); 
-      },
-      reverteffect: function(element, top_offset, left_offset) {
-        var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
-        element._revert = new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur});
-      },
-      endeffect: function(element) {
-        var toOpacity = typeof element._opacity == 'number' ? element._opacity : 1.0
-        new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity}); 
-      },
-      zindex: 1000,
-      revert: false,
-      scroll: false,
-      scrollSensitivity: 20,
-      scrollSpeed: 15,
-      snap: false   // false, or xy or [x,y] or function(x,y){ return [x,y] }
-    }, arguments[1] || {});
-
-    this.element = $(element);
-    
-    if(options.handle && (typeof options.handle == 'string')) {
-      var h = Element.childrenWithClassName(this.element, options.handle, true);
-      if(h.length>0) this.handle = h[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);
-
-    Element.makePositioned(this.element); // fix IE    
-
-    this.delta    = this.currentDelta();
-    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(Event.isLeftClick(event)) {    
-      // abort on form elements, fixes a Firefox issue
-      var src = Event.element(event);
-      if(src.tagName && (
-        src.tagName=='INPUT' ||
-        src.tagName=='SELECT' ||
-        src.tagName=='OPTION' ||
-        src.tagName=='BUTTON' ||
-        src.tagName=='TEXTAREA')) return;
-        
-      if(this.element._revert) {
-        this.element._revert.cancel();
-        this.element._revert = null;
-      }
-      
-      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.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);
-      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);
-    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;
-        p[1] += this.options.scroll.scrollTop;
-        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(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
-    
-    Event.stop(event);
-  },
-  
-  finishDrag: function(event, success) {
-    this.dragging = false;
-
-    if(this.options.ghosting) {
-      Position.relativize(this.element);
-      Element.remove(this._clone);
-      this._clone = null;
-    }
-
-    if(success) Droppables.fire(event, this.element);
-    Draggables.notify('onEnd', this, event);
-
-    var revert = this.options.revert;
-    if(revert && typeof revert == 'function') revert = revert(this.element);
-    
-    var d = this.currentDelta();
-    if(revert && this.options.reverteffect) {
-      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);
-    var d = this.currentDelta();
-    pos[0] -= d[0]; pos[1] -= d[1];
-    
-    if(this.options.scroll && (this.options.scroll != window)) {
-      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(typeof this.options.snap == 'function') {
-        p = this.options.snap(p[0],p[1],this);
-      } else {
-      if(this.options.snap instanceof Array) {
-        p = p.map( function(v, i) {
-          return Math.round(v/this.options.snap[i])*this.options.snap[i] }.bind(this))
-      } else {
-        p = p.map( function(v) {
-          return Math.round(v/this.options.snap)*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) {
-    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);
-    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 };
-  }
-}
-
-/*--------------------------------------------------------------------------*/
-
-var SortableObserver = Class.create();
-SortableObserver.prototype = {
-  initialize: function(element, observer) {
-    this.element   = $(element);
-    this.observer  = observer;
-    this.lastValue = Sortable.serialize(this.element);
-  },
-  
-  onStart: function() {
-    this.lastValue = Sortable.serialize(this.element);
-  },
-  
-  onEnd: function() {
-    Sortable.unmark();
-    if(this.lastValue != Sortable.serialize(this.element))
-      this.observer(this.element)
-  }
-}
-
-var Sortable = {
-  sortables: {},
-  
-  _findRootElement: function(element) {
-    while (element.tagName != "BODY") {  
-      if(element.id && Sortable.sortables[element.id]) return element;
-      element = element.parentNode;
-    }
-  },
-
-  options: function(element) {
-    element = Sortable._findRootElement($(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 = $(element);
-    var options = Object.extend({ 
-      element:     element,
-      tag:         'li',       // assumes li children, override with tag: 'tagname'
-      dropOnEmpty: false,
-      tree:        false,
-      treeTag:     'ul',
-      overlap:     'vertical', // one of 'vertical', 'horizontal'
-      constraint:  'vertical', // one of 'vertical', 'horizontal', false
-      containment: element,    // also takes array of elements (or id's); or false
-      handle:      false,      // or a CSS class
-      only:        false,
-      hoverclass:  null,
-      ghosting:    false,
-      scroll:      false,
-      scrollSensitivity: 20,
-      scrollSpeed: 15,
-      format:      /^[^_]*_(.*)$/,
-      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,
-      scroll:      options.scroll,
-      scrollSpeed: options.scrollSpeed,
-      scrollSensitivity: options.scrollSensitivity,
-      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
-      //greedy:      !options.dropOnEmpty
-    }
-    
-    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);
-    }
-
-    (this.findElements(element, options) || []).each( function(e) {
-      // handles are per-draggable
-      var handle = options.handle ? 
-        Element.childrenWithClassName(e, 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});
-      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) Element.hide(Sortable._marker);
-  },
-
-  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') || document.createElement('DIV');
-      Element.hide(Sortable._marker);
-      Element.addClassName(Sortable._marker, 'dropmarker');
-      Sortable._marker.style.position = 'absolute';
-      document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
-    }    
-    var offsets = Position.cumulativeOffset(dropon);
-    Sortable._marker.style.left = offsets[0] + 'px';
-    Sortable._marker.style.top = offsets[1] + 'px';
-    
-    if(position=='after')
-      if(sortable.overlap == 'horizontal') 
-        Sortable._marker.style.left = (offsets[0]+dropon.clientWidth) + 'px';
-      else
-        Sortable._marker.style.top = (offsets[1]+dropon.clientHeight) + 'px';
-    
-    Element.show(Sortable._marker);
-  },
-  
-  _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: new Array,
-        position: parent.children.length,
-        container: Sortable._findChildrenElement(children[i], options.treeTag.toUpperCase())
-      }
-      
-      /* 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; 
-  },
-
-  /* Finds the first element of the given tag type within a parent element.
-    Used for finding the first LI[ST] within a L[IST]I[TEM].*/
-  _findChildrenElement: function (element, containerTag) {
-    if (element && element.hasChildNodes)
-      for (var i = 0; i < element.childNodes.length; ++i)
-        if (element.childNodes[i].tagName == containerTag)
-          return element.childNodes[i];
-  
-    return null;
-  },
-
-  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: new Array,
-      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) + "=" + 
-                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) {
-  if (type == 'vertical' || type == 'height')
-    return element.offsetHeight;
-  else
-    return element.offsetWidth;
-}
\ No newline at end of file