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Filename : jquery.nestable.js
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/*!
* Nestable jQuery Plugin - Copyright (c) 2012 David Bushell - http://dbushell.com/
* Dual-licensed under the BSD or MIT licenses
*/;(function($,window,document,undefined)
{var hasTouch='ontouchstart'in document;var hasPointerEvents=(function()
{var el=document.createElement('div'),docEl=document.documentElement;if(!('pointerEvents'in el.style)){return false;}
el.style.pointerEvents='auto';el.style.pointerEvents='x';docEl.appendChild(el);var supports=window.getComputedStyle&&window.getComputedStyle(el,'').pointerEvents==='auto';docEl.removeChild(el);return!!supports;})();var defaults={listNodeName:'ol',itemNodeName:'li',rootClass:'dd',listClass:'dd-list',itemClass:'dd-item',dragClass:'dd-dragel',handleClass:'dd-handle',collapsedClass:'dd-collapsed',placeClass:'dd-placeholder',noDragClass:'dd-nodrag',emptyClass:'dd-empty',expandBtnHTML:'<button data-action="expand" type="button">Expand</button>',collapseBtnHTML:'<button data-action="collapse" type="button">Collapse</button>',group:0,maxDepth:5,threshold:20};function Plugin(element,options)
{this.w=$(document);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($(el));});list.el.on('click','button',function(e){if(list.dragEl){return;}
var target=$(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)
{var handle=$(e.target);if(!handle.hasClass(list.options.handleClass)){if(handle.closest('.'+list.options.noDragClass).length){return;}
handle=handle.closest('.'+list.options.handleClass);}
if(!handle.length||list.dragEl){return;}
list.isTouch=/^touch/.test(e.type);if(list.isTouch&&e.touches.length!==1){return;}
e.preventDefault();list.dragStart(e.touches?e.touches[0]:e);};var onMoveEvent=function(e)
{if(list.dragEl){e.preventDefault();list.dragMove(e.touches?e.touches[0]:e);}};var onEndEvent=function(e)
{if(list.dragEl){e.preventDefault();list.dragStop(e.touches?e.touches[0]:e);}};if(hasTouch){list.el[0].addEventListener('touchstart',onStartEvent,false);window.addEventListener('touchmove',onMoveEvent,false);window.addEventListener('touchend',onEndEvent,false);window.addEventListener('touchcancel',onEndEvent,false);}
list.el.on('mousedown',onStartEvent);list.w.on('mousemove',onMoveEvent);list.w.on('mouseup',onEndEvent);},serialize:function()
{var data,depth=0,list=this;step=function(level,depth)
{var array=[],items=level.children(list.options.itemNodeName);items.each(function()
{var li=$(this),item=$.extend({},li.data()),sub=li.children(list.options.listNodeName);if(sub.length){item.children=step(sub,depth+1);}
array.push(item);});return array;};data=step(list.el.find(list.options.listNodeName).first(),depth);return data;},serialise:function()
{return this.serialize();},reset:function()
{this.mouse={offsetX:0,offsetY:0,startX:0,startY:0,lastX:0,lastY:0,nowX:0,nowY:0,distX:0,distY:0,dirAx:0,dirX:0,dirY:0,lastDirX:0,lastDirY:0,distAxX:0,distAxY:0};this.isTouch=false;this.moving=false;this.dragEl=null;this.dragRootEl=null;this.dragDepth=0;this.hasNewRoot=false;this.pointEl=null;},expandItem:function(li)
{li.removeClass(this.options.collapsedClass);li.children('[data-action="expand"]').hide();li.children('[data-action="collapse"]').show();li.children(this.options.listNodeName).show();},collapseItem:function(li)
{var lists=li.children(this.options.listNodeName);if(lists.length){li.addClass(this.options.collapsedClass);li.children('[data-action="collapse"]').hide();li.children('[data-action="expand"]').show();li.children(this.options.listNodeName).hide();}},expandAll:function()
{var list=this;list.el.find(list.options.itemNodeName).each(function(){list.expandItem($(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);