/*!
 * Nestable jQuery Plugin - Copyright (c) 2012 David Bushell - http://dbushell.com/
 * Dual-licensed under the BSD or MIT licenses
 */
(function($,window,document,undefined){var hasTouch="ontouchstart"in document.documentElement;var hasPointerEvents=function(){var el=document.createElement("div"),docEl=document.documentElement;if(!("pointerEvents"in el.style)){return false}el.style.pointerEvents="auto";el.style.pointerEvents="x";docEl.appendChild(el);var supports=window.getComputedStyle&&window.getComputedStyle(el,"").pointerEvents==="auto";docEl.removeChild(el);return!!supports}();var eStart="mousedown touchstart MSPointerDown pointerdown",eMove="mousemove touchmove MSPointerMove pointermove",eEnd="mouseup touchend touchcancel MSPointerUp MSPointerCancel pointerup pointercancel";var defaults={listNodeName:"ol",itemNodeName:"li",rootClass:"dd",listClass:"dd-list",itemClass:"dd-item",dragClass:"dd-dragel",handleClass:"dd-handle",collapsedClass:"dd-collapsed",placeClass:"dd-placeholder",noDragClass:"dd-nodrag",emptyClass:"dd-empty",expandBtnHTML:'<button data-action="expand" type="button">Expand</button>',collapseBtnHTML:'<button data-action="collapse" type="button">Collapse</button>',group:0,maxDepth:5,threshold:20};function Plugin(element,options){this.w=$(window);this.el=$(element);this.options=$.extend({},defaults,options);this.init()}Plugin.prototype={init:function(){var list=this;list.reset();list.el.data("nestable-group",this.options.group);list.placeEl=$('<div class="'+list.options.placeClass+'"/>');$.each(this.el.find(list.options.itemNodeName),function(k,el){list.setParent($(el))});list.el.on("click","button",function(e){if(list.dragEl||"button"in e&&e.button!==0){return}var target=$(e.currentTarget),action=target.data("action"),item=target.parent(list.options.itemNodeName);if(action==="collapse"){list.collapseItem(item)}if(action==="expand"){list.expandItem(item)}});var onStartEvent=function(e){e=e.originalEvent;var handle=$(e.target);if(!handle.hasClass(list.options.handleClass)){if(handle.closest("."+list.options.noDragClass).length){return}handle=handle.closest("."+list.options.handleClass)}if(!handle.length||list.dragEl||"button"in e&&e.button!==0||"touches"in e&&e.touches.length!==1){return}e.preventDefault();list.dragStart("touches"in e?e.touches[0]:e)};var onMoveEvent=function(e){if(list.dragEl){e=e.originalEvent;e.preventDefault();list.dragMove("touches"in e?e.touches[0]:e)}};var onEndEvent=function(e){if(list.dragEl){e=e.originalEvent;e.preventDefault();list.dragStop("touches"in e?e.touches[0]:e)}};list.el.on(eStart,onStartEvent);list.w.on(eMove,onMoveEvent);list.w.on(eEnd,onEndEvent)},serialize:function(){var data,depth=0,list=this;step=function(level,depth){var array=[],items=level.children(list.options.itemNodeName);items.each(function(){var li=$(this),item=$.extend({},li.data()),sub=li.children(list.options.listNodeName);if(sub.length){item.children=step(sub,depth+1)}array.push(item)});return array};data=step(list.el.find(list.options.listNodeName).first(),depth);return data},serialise:function(){return this.serialize()},reset:function(){this.mouse={offsetX:0,offsetY:0,startX:0,startY:0,lastX:0,lastY:0,nowX:0,nowY:0,distX:0,distY:0,dirAx:0,dirX:0,dirY:0,lastDirX:0,lastDirY:0,distAxX:0,distAxY:0};this.moving=false;this.dragEl=null;this.dragRootEl=null;this.dragDepth=0;this.hasNewRoot=false;this.pointEl=null},expandItem:function(li){li.removeClass(this.options.collapsedClass);li.children('[data-action="expand"]').hide();li.children('[data-action="collapse"]').show();li.children(this.options.listNodeName).show()},collapseItem:function(li){var lists=li.children(this.options.listNodeName);if(lists.length){li.addClass(this.options.collapsedClass);li.children('[data-action="collapse"]').hide();li.children('[data-action="expand"]').show();li.children(this.options.listNodeName).hide()}},expandAll:function(){var list=this;list.el.find(list.options.itemNodeName).each(function(){list.expandItem($(this))})},collapseAll:function(){var list=this;list.el.find(list.options.itemNodeName).each(function(){list.collapseItem($(this))})},setParent:function(li){if(li.children(this.options.listNodeName).length){li.prepend($(this.options.expandBtnHTML));li.prepend($(this.options.collapseBtnHTML))}li.children('[data-action="expand"]').hide()},unsetParent:function(li){li.removeClass(this.options.collapsedClass);li.children("[data-action]").remove();li.children(this.options.listNodeName).remove()},dragStart:function(e){var mouse=this.mouse,target=$(e.target),dragItem=target.closest(this.options.itemNodeName);this.placeEl.css("height",dragItem.height());mouse.offsetX=e.offsetX!==undefined?e.offsetX:e.pageX-target.offset().left;mouse.offsetY=e.offsetY!==undefined?e.offsetY:e.pageY-target.offset().top;mouse.startX=mouse.lastX=e.pageX;mouse.startY=mouse.lastY=e.pageY;this.dragRootEl=this.el;this.dragEl=$(document.createElement(this.options.listNodeName)).addClass(this.options.listClass+" "+this.options.dragClass);this.dragEl.css("width",dragItem.width());dragItem.after(this.placeEl);dragItem[0].parentNode.removeChild(dragItem[0]);dragItem.appendTo(this.dragEl);$(document.body).append(this.dragEl);this.dragEl.css({left:e.pageX-mouse.offsetX,top:e.pageY-mouse.offsetY});var i,depth,items=this.dragEl.find(this.options.itemNodeName);for(i=0;i<items.length;i++){depth=$(items[i]).parents(this.options.listNodeName).length;if(depth>this.dragDepth){this.dragDepth=depth}}},dragStop:function(e){var el=this.dragEl.children(this.options.itemNodeName).first();el[0].parentNode.removeChild(el[0]);this.placeEl.replaceWith(el);this.dragEl.remove();this.el.trigger("change");if(this.hasNewRoot){this.dragRootEl.trigger("change")}this.reset()},dragMove:function(e){var list,parent,prev,next,depth,opt=this.options,mouse=this.mouse;this.dragEl.css({left:e.pageX-mouse.offsetX,top:e.pageY-mouse.offsetY});mouse.lastX=mouse.nowX;mouse.lastY=mouse.nowY;mouse.nowX=e.pageX;mouse.nowY=e.pageY;mouse.distX=mouse.nowX-mouse.lastX;mouse.distY=mouse.nowY-mouse.lastY;mouse.lastDirX=mouse.dirX;mouse.lastDirY=mouse.dirY;mouse.dirX=mouse.distX===0?0:mouse.distX>0?1:-1;mouse.dirY=mouse.distY===0?0:mouse.distY>0?1:-1;var newAx=Math.abs(mouse.distX)>Math.abs(mouse.distY)?1:0;if(!mouse.moving){mouse.dirAx=newAx;mouse.moving=true;return}if(mouse.dirAx!==newAx){mouse.distAxX=0;mouse.distAxY=0}else{mouse.distAxX+=Math.abs(mouse.distX);if(mouse.dirX!==0&&mouse.dirX!==mouse.lastDirX){mouse.distAxX=0}mouse.distAxY+=Math.abs(mouse.distY);if(mouse.dirY!==0&&mouse.dirY!==mouse.lastDirY){mouse.distAxY=0}}mouse.dirAx=newAx;if(mouse.dirAx&&mouse.distAxX>=opt.threshold){mouse.distAxX=0;prev=this.placeEl.prev(opt.itemNodeName);if(mouse.distX>0&&prev.length&&!prev.hasClass(opt.collapsedClass)){list=prev.find(opt.listNodeName).last();depth=this.placeEl.parents(opt.listNodeName).length;if(depth+this.dragDepth<=opt.maxDepth){if(!list.length){list=$("<"+opt.listNodeName+"/>").addClass(opt.listClass);list.append(this.placeEl);prev.append(list);this.setParent(prev)}else{list=prev.children(opt.listNodeName).last();list.append(this.placeEl)}}}if(mouse.distX<0){next=this.placeEl.next(opt.itemNodeName);if(!next.length){parent=this.placeEl.parent();this.placeEl.closest(opt.itemNodeName).after(this.placeEl);if(!parent.children().length){this.unsetParent(parent.parent())}}}}var isEmpty=false;if(!hasPointerEvents){this.dragEl[0].style.visibility="hidden"}this.pointEl=$(document.elementFromPoint(e.pageX-document.body.scrollLeft,e.pageY-(window.pageYOffset||document.documentElement.scrollTop)));if(!hasPointerEvents){this.dragEl[0].style.visibility="visible"}if(this.pointEl.hasClass(opt.handleClass)){this.pointEl=this.pointEl.parent(opt.itemNodeName)}if(this.pointEl.hasClass(opt.emptyClass)){isEmpty=true}else if(!this.pointEl.length||!this.pointEl.hasClass(opt.itemClass)){return}var pointElRoot=this.pointEl.closest("."+opt.rootClass),isNewRoot=this.dragRootEl.data("nestable-id")!==pointElRoot.data("nestable-id");if(!mouse.dirAx||isNewRoot||isEmpty){if(isNewRoot&&opt.group!==pointElRoot.data("nestable-group")){return}depth=this.dragDepth-1+this.pointEl.parents(opt.listNodeName).length;if(depth>opt.maxDepth){return}var before=e.pageY<this.pointEl.offset().top+this.pointEl.height()/2;parent=this.placeEl.parent();if(isEmpty){list=$(document.createElement(opt.listNodeName)).addClass(opt.listClass);list.append(this.placeEl);this.pointEl.replaceWith(list)}else if(before){this.pointEl.before(this.placeEl)}else{this.pointEl.after(this.placeEl)}if(!parent.children().length){this.unsetParent(parent.parent())}if(!this.dragRootEl.find(opt.itemNodeName).length){this.dragRootEl.append('<div class="'+opt.emptyClass+'"/>')}if(isNewRoot){this.dragRootEl=pointElRoot;this.hasNewRoot=this.el[0]!==this.dragRootEl[0]}}}};$.fn.nestable=function(params){var lists=this,retval=this;lists.each(function(){var plugin=$(this).data("nestable");if(!plugin){$(this).data("nestable",new Plugin(this,params));$(this).data("nestable-id",(new Date).getTime())}else{if(typeof params==="string"&&typeof plugin[params]==="function"){retval=plugin[params]()}}});return retval||lists}})(window.jQuery||window.Zepto,window,document);