"use strict";
/**
 * @class elFinder - file manager for web
 *
 * @author Dmitry (dio) Levashov
 **/
var elFinder = function(node, opts, bootCallback) {
	//this.time('load');
	
	var self = this,
		
		/**
		 * Objects array of jQuery.Deferred that calls before elFinder boot up
		 * 
		 * @type Array
		 */
		dfrdsBeforeBootup = [],
		
		/**
		 * Plugin name to check for conflicts with bootstrap etc
		 *
		 * @type Array
		 **/
		conflictChecks = ['button'],
		
		/**
		 * Node on which elfinder creating
		 *
		 * @type jQuery
		 **/
		node = $(node),
		
		/**
		 * Object of events originally registered in this node
		 * 
		 * @type Object
		 */
		prevEvents = $.extend(true, {}, $._data(node.get(0), 'events')),
		
		/**
		 * Store node contents.
		 *
		 * @see this.destroy
		 * @type jQuery
		 **/
		prevContent = $('<div/>').append(node.contents()).attr('class', node.attr('class') || '').attr('style', node.attr('style') || ''),
		
		/**
		 * Instance ID. Required to get/set cookie
		 *
		 * @type String
		 **/
		id = node.attr('id') || '',
		
		/**
		 * Events namespace
		 *
		 * @type String
		 **/
		namespace = 'elfinder-' + (id ? id : Math.random().toString().substr(2, 7)),
		
		/**
		 * Mousedown event
		 *
		 * @type String
		 **/
		mousedown = 'mousedown.'+namespace,
		
		/**
		 * Keydown event
		 *
		 * @type String
		 **/
		keydown = 'keydown.'+namespace,
		
		/**
		 * Keypress event
		 *
		 * @type String
		 **/
		keypress = 'keypress.'+namespace,
		
		/**
		 * Is shortcuts/commands enabled
		 *
		 * @type Boolean
		 **/
		enabled = true,
		
		/**
		 * Store enabled value before ajax requiest
		 *
		 * @type Boolean
		 **/
		prevEnabled = true,
		
		/**
		 * List of build-in events which mapped into methods with same names
		 *
		 * @type Array
		 **/
		events = ['enable', 'disable', 'load', 'open', 'reload', 'select',  'add', 'remove', 'change', 'dblclick', 'getfile', 'lockfiles', 'unlockfiles', 'selectfiles', 'unselectfiles', 'dragstart', 'dragstop', 'search', 'searchend', 'viewchange'],
		
		/**
		 * Rules to validate data from backend
		 *
		 * @type Object
		 **/
		rules = {},
		
		/**
		 * Current working directory hash
		 *
		 * @type String
		 **/
		cwd = '',
		
		/**
		 * Current working directory options default
		 *
		 * @type Object
		 **/
		cwdOptionsDefault = {
			path          : '',
			url           : '',
			tmbUrl        : '',
			disabled      : [],
			separator     : '/',
			archives      : [],
			extract       : [],
			copyOverwrite : true,
			uploadOverwrite : true,
			uploadMaxSize : 0,
			jpgQuality    : 100,
			tmbCrop       : false,
			tmb           : false // old API
		},
		
		/**
		 * Current working directory options
		 *
		 * @type Object
		 **/
		cwdOptions = {},
		
		/**
		 * Files/dirs cache
		 *
		 * @type Object
		 **/
		files = {},
		
		/**
		 * Files/dirs hash cache of each dirs
		 *
		 * @type Object
		 **/
		ownFiles = {},
		
		/**
		 * Selected files hashes
		 *
		 * @type Array
		 **/
		selected = [],
		
		/**
		 * Events listeners
		 *
		 * @type Object
		 **/
		listeners = {},
		
		/**
		 * Shortcuts
		 *
		 * @type Object
		 **/
		shortcuts = {},
		
		/**
		 * Buffer for copied files
		 *
		 * @type Array
		 **/
		clipboard = [],
		
		/**
		 * Copied/cuted files hashes
		 * Prevent from remove its from cache.
		 * Required for dispaly correct files names in error messages
		 *
		 * @type Object
		 **/
		remember = {},
		
		/**
		 * Queue for 'open' requests
		 *
		 * @type Array
		 **/
		queue = [],
		
		/**
		 * Queue for only cwd requests e.g. `tmb`
		 *
		 * @type Array
		 **/
		cwdQueue = [],
		
		/**
		 * Commands prototype
		 *
		 * @type Object
		 **/
		base = new self.command(self),
		
		/**
		 * elFinder node width
		 *
		 * @type String
		 * @default "auto"
		 **/
		width  = 'auto',
		
		/**
		 * elFinder node height
		 * Number: pixcel or String: Number + "%"
		 *
		 * @type Number | String
		 * @default 400
		 **/
		height = 400,
		
		/**
		 * Base node object or selector
		 * Element which is the reference of the height percentage
		 *
		 * @type Object|String
		 * @default null | $(window) (if height is percentage)
		 **/
		heightBase = null,
		
		/**
		 * elfinder path for sound played on remove
		 * @type String
		 * @default ./sounds/
		 **/
		soundPath = './sounds/',
				
		beeper = $(document.createElement('audio')).hide().appendTo('body')[0],
			
		syncInterval,
		autoSyncStop = 0,
		
		uiCmdMapPrev = '',
		
		gcJobRes = null,
		
		open = function(data) {
			// NOTES: Do not touch data object
		
			var volumeid, contextmenu, emptyDirs = {}, stayDirs = {},
				rmClass, hashes, calc, gc, collapsed, prevcwd;
			
			if (self.api >= 2.1) {
				// support volume driver option `uiCmdMap`
				self.commandMap = (data.options.uiCmdMap && Object.keys(data.options.uiCmdMap).length)? data.options.uiCmdMap : {};
				if (uiCmdMapPrev !== JSON.stringify(self.commandMap)) {
					uiCmdMapPrev = JSON.stringify(self.commandMap);
				}
			} else {
				self.options.sync = 0;
			}
			
			if (data.init) {
				// init - reset cache
				files = {};
				ownFiles = {};
			} else {
				// remove only files from prev cwd
				// and collapsed directory (included 100+ directories) to empty for perfomance tune in DnD
				prevcwd = cwd;
				rmClass = 'elfinder-subtree-loaded ' + self.res('class', 'navexpand');
				collapsed = self.res('class', 'navcollapse');
				hashes = Object.keys(files);
				calc = function(i) {
					if (!files[i]) {
						return true;
					}
					
					var isDir = (files[i].mime === 'directory'),
						phash = files[i].phash,
						pnav;
					
					if (
						(!isDir
							|| emptyDirs[phash]
							|| (!stayDirs[phash]
								&& $('#'+self.navHash2Id(files[i].hash)).is(':hidden')
								&& $('#'+self.navHash2Id(phash)).next('.elfinder-navbar-subtree').children().length > 100
							)
						)
						&& (isDir || phash !== cwd)
						&& ! remember[i]
					) {
						if (isDir && !emptyDirs[phash]) {
							emptyDirs[phash] = true;
							$('#'+self.navHash2Id(phash))
							 .removeClass(rmClass)
							 .next('.elfinder-navbar-subtree').empty();
						}
						deleteCache(files[i]);
					} else if (isDir) {
						stayDirs[phash] = true;
					}
				};
				gc = function() {
					if (hashes.length) {
						gcJobRes && gcJobRes._abort();
						gcJobRes = self.asyncJob(calc, hashes, {
							interval : 20,
							numPerOnce : 100
						});
					}
				};
				
				self.trigger('filesgc').one('filesgc', function() {
					hashes = [];
				});
				
				self.one('opendone', function() {
					if (prevcwd !== cwd) {
						if (! node.data('lazycnt')) {
							gc();
						} else {
							self.one('lazydone', gc);
						}
					}
				});
			}

			self.sorters = [];
			cwd = data.cwd.hash;
			cache(data.files);
			if (!files[cwd]) {
				cache([data.cwd]);
			}
			self.lastDir(cwd);
			
			self.autoSync();
		},
		
		/**
		 * Store info about files/dirs in "files" object.
		 *
		 * @param  Array  files
		 * @return void
		 **/
		cache = function(data) {
			var defsorter = { name: true, perm: true, date: true,  size: true, kind: true },
				sorterChk = (self.sorters.length === 0),
				l         = data.length,
				setSorter = function(f) {
					var f = f || {};
					self.sorters = [];
					$.each(self.sortRules, function(key) {
						if (defsorter[key] || typeof f[key] !== 'undefined' || (key === 'mode' && typeof f.perm !== 'undefined')) {
							self.sorters.push(key);
						}
					});
				},
				f, i;

			for (i = 0; i < l; i++) {
				f = Object.assign({}, data[i]);
				if (f.name && f.hash && f.mime) {
					if (sorterChk && f.phash === cwd) {
						setSorter(f);
						sorterChk = false;
					}
					
					// make or update of leaf roots cache
					if (f.isroot && f.phash) {
						if (! self.leafRoots[f.phash]) {
							self.leafRoots[f.phash] = [ f.hash ];
						} else {
							if ($.inArray(f.hash, self.leafRoots[f.phash]) === -1) {
								self.leafRoots[f.phash].push(f.hash);
							}
						}
						if (files[f.phash]) {
							if (! files[f.phash].dirs) {
								files[f.phash].dirs = 1;
							}
							if (f.ts && (files[f.phash].ts || 0) < f.ts) {
								files[f.phash].ts = f.ts;
							}
						}
					}
					
					files[f.hash] && deleteCache(files[f.hash], true);
					files[f.hash] = f;
					if (f.mime === 'directory' && !ownFiles[f.hash]) {
						ownFiles[f.hash] = {};
					}
					if (f.phash) {
						if (!ownFiles[f.phash]) {
							ownFiles[f.phash] = {};
						}
						ownFiles[f.phash][f.hash] = true;
					}
				} 
			}
			
			// for empty folder
			sorterChk && setSorter();
		},
		
		/**
		 * Delete file object from files caches
		 * 
		 * @param  Array  removed hashes
		 * @return void
		 */
		remove = function(removed) {
			var l       = removed.length,
				roots   = {},
				rm      = function(hash) {
					var file = files[hash], i;
					if (file) {
						if (file.mime === 'directory') {
							if (roots[hash]) {
								delete self.roots[roots[hash]];
							}
							if (self.searchStatus.state < 2) {
								$.each(files, function(h, f) {
									f.phash == hash && rm(h);
								});
							}
						}
						deleteCache(files[hash]);
					}
				};
		
			$.each(self.roots, function(k, v) {
				roots[v] = k;
			});
			while (l--) {
				rm(removed[l]);
			}
		},
		
		/**
		 * Update file object in files caches
		 * 
		 * @param  Array  changed file objects
		 * @return void
		 */
		change = function(changed) {
			$.each(changed, function(i, file) {
				var hash = file.hash;
				if (files[hash]) {
					$.each(['locked', 'hidden', 'width', 'height'], function(i, v){
						if (files[hash][v] && !file[v]) {
							delete files[hash][v];
						}
					});
				}
				files[hash] = files[hash] ? Object.assign(files[hash], file) : file;
			});
		},
		
		/**
		 * Delete cache data of files, ownFiles and self.optionsByHashes
		 * 
		 * @param  Object  file
		 * @param  Boolean update
		 * @return void
		 */
		deleteCache = function(file, update) {
			var hash = file.hash,
				phash = file.phash;
			
			if (phash && ownFiles[phash]) {
				 delete ownFiles[phash][hash];
			}
			if (!update) {
				ownFiles[hash] && delete ownFiles[hash];
				self.optionsByHashes[hash] && delete self.optionsByHashes[hash];
			}
			delete files[hash];
		},
		
		/**
		 * Maximum number of concurrent connections on request
		 * 
		 * @type Number
		 */
		requestMaxConn,
		
		/**
		 * Current number of connections
		 * 
		 * @type Number
		 */
		requestCnt = 0,
		
		/**
		 * Queue waiting for connection
		 * 
		 * @type Array
		 */
		requestQueue = [],
		
		/**
		 * Flag to cancel the `open` command waiting for connection
		 * 
		 * @type Boolean
		 */
		requestQueueSkipOpen = false,
		
		/**
		 * Exec shortcut
		 *
		 * @param  jQuery.Event  keydown/keypress event
		 * @return void
		 */
		execShortcut = function(e) {
			var code    = e.keyCode,
				ctrlKey = !!(e.ctrlKey || e.metaKey),
				ddm;

			if (enabled) {

				$.each(shortcuts, function(i, shortcut) {
					if (shortcut.type    == e.type 
					&& shortcut.keyCode  == code 
					&& shortcut.shiftKey == e.shiftKey 
					&& shortcut.ctrlKey  == ctrlKey 
					&& shortcut.altKey   == e.altKey) {
						e.preventDefault();
						e.stopPropagation();
						shortcut.callback(e, self);
						self.debug('shortcut-exec', i+' : '+shortcut.description);
					}
				});
				
				// prevent tab out of elfinder
				if (code == $.ui.keyCode.TAB && !$(e.target).is(':input')) {
					e.preventDefault();
				}
				
				// cancel any actions by [Esc] key
				if (e.type === 'keydown' && code == $.ui.keyCode.ESCAPE) {
					// copy or cut 
					if (! node.find('.ui-widget:visible').length) {
						self.clipboard().length && self.clipboard([]);
					}
					// dragging
					if ($.ui.ddmanager) {
						ddm = $.ui.ddmanager.current;
						ddm && ddm.helper && ddm.cancel();
					}
					// button menus
					node.find('.ui-widget.elfinder-button-menu').hide();
					// trigger keydownEsc
					self.trigger('keydownEsc', e);
				}

			}
		},
		date = new Date(),
		utc,
		i18n,
		inFrame = (window.parent !== window),
		parentIframe = (function() {
			var pifm, ifms;
			if (inFrame) {
				try {
					ifms = $('iframe', window.parent.document);
					if (ifms.length) {
						$.each(ifms, function(i, ifm) {
							if (ifm.contentWindow === window) {
								pifm = $(ifm);
								return false;
							}
						});
					}
				} catch(e) {}
			}
			return pifm;
		})(),
		bootUp;

	// check opt.bootCallback
	if (opts.bootCallback && typeof opts.bootCallback === 'function') {
		(function() {
			var func = bootCallback,
				opFunc = opts.bootCallback;
			bootCallback = function(fm, extraObj) {
				func && typeof func === 'function' && func.call(this, fm, extraObj);
				opFunc.call(this, fm, extraObj);
			}
		})();
	}
	delete opts.bootCallback;

	/**
	 * Protocol version
	 *
	 * @type String
	 **/
	this.api = null;
	
	/**
	 * elFinder use new api
	 *
	 * @type Boolean
	 **/
	this.newAPI = false;
	
	/**
	 * elFinder use old api
	 *
	 * @type Boolean
	 **/
	this.oldAPI = false;
	
	/**
	 * Net drivers names
	 *
	 * @type Array
	 **/
	this.netDrivers = [];
	
	/**
	 * Base URL of elfFinder library starting from Manager HTML
	 * 
	 * @type String
	 */
	this.baseUrl = '';
	
	/**
	 * Is elFinder CSS loaded
	 * 
	 * @type Boolean
	 */
	this.cssloaded = false;
	
	/**
	 * Callback function at boot up that option specified at elFinder starting
	 * 
	 * @type Function
	 */
	this.bootCallback;
	
	/**
	 * Configuration options
	 *
	 * @type Object
	 **/
	this.options = $.extend(true, {}, this._options, opts||{});
	
	// set dispInlineRegex
	cwdOptionsDefault['dispInlineRegex'] = this.options.dispInlineRegex;
	
	// auto load required CSS
	if (this.options.cssAutoLoad) {
		(function(fm) {
			var myTag = $('head > script[src$="js/elfinder.min.js"],script[src$="js/elfinder.full.js"]:first'),
				base, baseUrl, hide, fi, cnt;
			if (myTag.length) {
				// hide elFinder node while css loading
				hide = $('<style>.elfinder{visibility:hidden;overflow:hidden}</style>');
				
				$('head').append(hide);
				baseUrl = myTag.attr('src').replace(/js\/[^\/]+$/, '');
				if (! baseUrl.match(/^(https?\/\/|\/)/)) {
					// check <base> tag
					if (base = $('head > base[href]').attr('href')) {
						baseUrl = base.replace(/\/$/, '') + '/' + baseUrl; 
					}
				}
				fm.loadCss([baseUrl+'css/elfinder.min.css', baseUrl+'css/theme.css']);
				
				fm.baseUrl = baseUrl;
				
				// additional CSS files
				if (Array.isArray(fm.options.cssAutoLoad)) {
					fm.loadCss(fm.options.cssAutoLoad);
				}
				
				// check css loaded and remove hide
				cnt = 1000; // timeout 10 secs
				fi = setInterval(function() {
					if (--cnt < 0 || node.css('visibility') !== 'hidden') {
						clearInterval(fi);
						hide.remove();
						fm.cssloaded = true;
						fm.trigger('cssloaded');
					}
				}, 10);
			} else {
				fm.options.cssAutoLoad = false;
			}
		})(this);
	}
	
	/**
	 * Volume option to set the properties of the root Stat
	 * 
	 * @type Object
	 */
	this.optionProperties = {
		icon: void(0),
		csscls: void(0),
		tmbUrl: void(0),
		uiCmdMap: {},
		netkey: void(0),
		disabled: []
	};
	
	if (opts.ui) {
		this.options.ui = opts.ui;
	}
	
	if (opts.commands) {
		this.options.commands = opts.commands;
	}
	
	if (opts.uiOptions) {
		if (opts.uiOptions.toolbar && Array.isArray(opts.uiOptions.toolbar)) {
			if ($.isPlainObject(opts.uiOptions.toolbar[opts.uiOptions.toolbar.length - 1])) {
				Object.assign(this.options.uiOptions.toolbarExtra, opts.uiOptions.toolbar.pop());
			}
			this.options.uiOptions.toolbar = opts.uiOptions.toolbar;
		}
		if (opts.uiOptions.toolbarExtra && $.isPlainObject(opts.uiOptions.toolbarExtra)) {
			Object.assign(this.options.uiOptions.toolbarExtra, opts.uiOptions.toolbarExtra);
		}
	
		if (opts.uiOptions.cwd && opts.uiOptions.cwd.listView) {
			if (opts.uiOptions.cwd.listView.columns) {
				this.options.uiOptions.cwd.listView.columns = opts.uiOptions.cwd.listView.columns;
			}
			if (opts.uiOptions.cwd.listView.columnsCustomName) {
				this.options.uiOptions.cwd.listView.columnsCustomName = opts.uiOptions.cwd.listView.columnsCustomName;
			}
		}
	}
	// join toolbarExtra to toolbar
	this.options.uiOptions.toolbar.push(this.options.uiOptions.toolbarExtra);
	delete this.options.uiOptions.toolbarExtra;
	
	if (opts.contextmenu) {
		Object.assign(this.options.contextmenu, opts.contextmenu);
	}
	
	if (! inFrame && ! this.options.enableAlways && $('body').children().length === 2) { // only node and beeper
		this.options.enableAlways = true;
	}
	
	if (this.baseUrl === '') {
		this.baseUrl = this.options.baseUrl? this.options.baseUrl : '';
	}
	
	// make options.debug
	if (this.options.debug === true) {
		this.options.debug = 'all';
	} else if (Array.isArray(this.options.debug)) {
		(function() {
			var d = {};
			$.each(self.options.debug, function() {
				d[this] = true;
			});
			self.options.debug = d;
		})();
	} else {
		this.options.debug = false;
	}
	
	/**
	 * Original functions evacuated by conflict check
	 * 
	 * @type Object
	 */
	this.noConflicts = {};
	
	/**
	 * Check and save conflicts with bootstrap etc
	 * 
	 * @type Function
	 */
	this.noConflict = function() {
		$.each(conflictChecks, function(i, p) {
			if ($.fn[p] && typeof $.fn[p].noConflict === 'function') {
				self.noConflicts[p] = $.fn[p].noConflict();
			}
		});
	}
	// do check conflict
	this.noConflict();
	
	/**
	 * Is elFinder over CORS
	 *
	 * @type Boolean
	 **/
	this.isCORS = false;
	
	// configure for CORS
	(function(){
		var parseUrl = document.createElement('a'),
			parseUploadUrl;
		parseUrl.href = opts.url;
		if (opts.urlUpload && (opts.urlUpload !== opts.url)) {
			parseUploadUrl = document.createElement('a');
			parseUploadUrl.href = opts.urlUpload;
		}
		if (window.location.host !== parseUrl.host || (parseUploadUrl && (window.location.host !== parseUploadUrl.host))) {
			self.isCORS = true;
			if (!$.isPlainObject(self.options.customHeaders)) {
				self.options.customHeaders = {};
			}
			if (!$.isPlainObject(self.options.xhrFields)) {
				self.options.xhrFields = {};
			}
			self.options.requestType = 'post';
			self.options.customHeaders['X-Requested-With'] = 'XMLHttpRequest';
			self.options.xhrFields['withCredentials'] = true;
		}
	})();

	/**
	 * Ajax request type
	 *
	 * @type String
	 * @default "get"
	 **/
	this.requestType = /^(get|post)$/i.test(this.options.requestType) ? this.options.requestType.toLowerCase() : 'get';
	
	// set `requestMaxConn` by option
	requestMaxConn = Math.max(parseInt(this.options.requestMaxConn), 1);
	
	/**
	 * Any data to send across every ajax request
	 *
	 * @type Object
	 * @default {}
	 **/
	this.customData = $.isPlainObject(this.options.customData) ? this.options.customData : {};

	/**
	 * Any custom headers to send across every ajax request
	 *
	 * @type Object
	 * @default {}
	*/
	this.customHeaders = $.isPlainObject(this.options.customHeaders) ? this.options.customHeaders : {};

	/**
	 * Any custom xhrFields to send across every ajax request
	 *
	 * @type Object
	 * @default {}
	 */
	this.xhrFields = $.isPlainObject(this.options.xhrFields) ? this.options.xhrFields : {};

	/**
	 * command names for into queue for only cwd requests
	 * these commands aborts before `open` request
	 *
	 * @type Array
	 * @default ['tmb', 'parents']
	 */
	this.abortCmdsOnOpen = this.options.abortCmdsOnOpen || ['tmb', 'parents'];

	/**
	 * ID. Required to create unique cookie name
	 *
	 * @type String
	 **/
	this.id = id;
	
	/**
	 * ui.nav id prefix
	 * 
	 * @type String
	 */
	this.navPrefix = 'nav' + (elFinder.prototype.uniqueid? elFinder.prototype.uniqueid : '') + '-';
	
	/**
	 * ui.cwd id prefix
	 * 
	 * @type String
	 */
	this.cwdPrefix = elFinder.prototype.uniqueid? ('cwd' + elFinder.prototype.uniqueid + '-') : '';
	
	// Increment elFinder.prototype.uniqueid
	++elFinder.prototype.uniqueid;
	
	/**
	 * URL to upload files
	 *
	 * @type String
	 **/
	this.uploadURL = opts.urlUpload || opts.url;
	
	/**
	 * Events namespace
	 *
	 * @type String
	 **/
	this.namespace = namespace;

	/**
	 * Today timestamp
	 *
	 * @type Number
	 **/
	this.today = (new Date(date.getFullYear(), date.getMonth(), date.getDate())).getTime()/1000;
	
	/**
	 * Yesterday timestamp
	 *
	 * @type Number
	 **/
	this.yesterday = this.today - 86400;
	
	utc = this.options.UTCDate ? 'UTC' : '';
	
	this.getHours    = 'get'+utc+'Hours';
	this.getMinutes  = 'get'+utc+'Minutes';
	this.getSeconds  = 'get'+utc+'Seconds';
	this.getDate     = 'get'+utc+'Date';
	this.getDay      = 'get'+utc+'Day';
	this.getMonth    = 'get'+utc+'Month';
	this.getFullYear = 'get'+utc+'FullYear';
	
	/**
	 * elFinder node z-index (auto detect on elFinder load)
	 *
	 * @type null | Number
	 **/
	this.zIndex;

	/**
	 * Current search status
	 * 
	 * @type Object
	 */
	this.searchStatus = {
		state  : 0, // 0: search ended, 1: search started, 2: in search result
		query  : '',
		target : '',
		mime   : '',
		mixed  : false, // in multi volumes search: false or Array that target volume ids
		ininc  : false // in incremental search
	};

	/**
	 * Method to store/fetch data
	 *
	 * @type Function
	 **/
	this.storage = (function() {
		try {
			if ('localStorage' in window && window['localStorage'] !== null) {
				if (self.UA.Safari) {
					// check for Mac/iOS safari private browsing mode
					window.localStorage.setItem('elfstoragecheck', 1);
					window.localStorage.removeItem('elfstoragecheck');
				}
				return self.localStorage;
			} else {
				return self.cookie;
			}
		} catch (e) {
			return self.cookie;
		}
	})();

	/**
	 * Interface language
	 *
	 * @type String
	 * @default "en"
	 **/
	this.lang = this.storage('lang') || this.options.lang;

	this.viewType = this.storage('view') || this.options.defaultView || 'icons';

	this.sortType = this.storage('sortType') || this.options.sortType || 'name';
	
	this.sortOrder = this.storage('sortOrder') || this.options.sortOrder || 'asc';

	this.sortStickFolders = this.storage('sortStickFolders');
	if (this.sortStickFolders === null) {
		this.sortStickFolders = !!this.options.sortStickFolders;
	} else {
		this.sortStickFolders = !!this.sortStickFolders
	}

	this.sortAlsoTreeview = this.storage('sortAlsoTreeview');
	if (this.sortAlsoTreeview === null) {
		this.sortAlsoTreeview = !!this.options.sortAlsoTreeview;
	} else {
		this.sortAlsoTreeview = !!this.sortAlsoTreeview
	}

	this.sortRules = $.extend(true, {}, this._sortRules, this.options.sortRules);
	
	$.each(this.sortRules, function(name, method) {
		if (typeof method != 'function') {
			delete self.sortRules[name];
		} 
	});
	
	this.compare = $.proxy(this.compare, this);
	
	/**
	 * Delay in ms before open notification dialog
	 *
	 * @type Number
	 * @default 500
	 **/
	this.notifyDelay = this.options.notifyDelay > 0 ? parseInt(this.options.notifyDelay) : 500;
	
	/**
	 * Dragging UI Helper object
	 *
	 * @type jQuery | null
	 **/
	this.draggingUiHelper = null;
	
	/**
	 * Base droppable options
	 *
	 * @type Object
	 **/
	this.droppable = {
		greedy     : true,
		tolerance  : 'pointer',
		accept     : '.elfinder-cwd-file-wrapper,.elfinder-navbar-dir,.elfinder-cwd-file,.elfinder-cwd-filename',
		hoverClass : this.res('class', 'adroppable'),
		classes    : { // Deprecated hoverClass jQueryUI>=1.12.0
			'ui-droppable-hover': this.res('class', 'adroppable')
		},
		autoDisable: true, // elFinder original, see jquery.elfinder.js
		drop : function(e, ui) {
			var dst     = $(this),
				targets = $.map(ui.helper.data('files')||[], function(h) { return h || null }),
				result  = [],
				dups    = [],
				faults  = [],
				isCopy  = ui.helper.hasClass('elfinder-drag-helper-plus'),
				c       = 'class',
				cnt, hash, i, h;
			
			if (typeof e.button === 'undefined' || ui.helper.data('namespace') !== namespace || ! self.insideWorkzone(e.pageX, e.pageY)) {
				return false;
			}
			if (dst.hasClass(self.res(c, 'cwdfile'))) {
				hash = self.cwdId2Hash(dst.attr('id'));
			} else if (dst.hasClass(self.res(c, 'navdir'))) {
				hash = self.navId2Hash(dst.attr('id'));
			} else {
				hash = cwd;
			}

			cnt = targets.length;
			
			while (cnt--) {
				h = targets[cnt];
				// ignore drop into itself or in own location
				if (h != hash && files[h].phash != hash) {
					result.push(h);
				} else {
					((isCopy && h !== hash && files[hash].write)? dups : faults).push(h);
				}
			}
			
			if (faults.length) {
				return false;
			}
			
			ui.helper.data('droped', true);
			
			if (dups.length) {
				ui.helper.hide();
				self.exec('duplicate', dups);
			}
			
			if (result.length) {
				ui.helper.hide();
				self.clipboard(result, !isCopy);
				self.exec('paste', hash, void 0, hash).always(function(){
					self.clipboard([]);
					self.trigger('unlockfiles', {files : targets});
				});
				self.trigger('drop', {files : targets});
			}
		}
	};
	
	/**
	 * Return true if filemanager is active
	 *
	 * @return Boolean
	 **/
	this.enabled = function() {
		return enabled && this.visible();
	};
	
	/**
	 * Return true if filemanager is visible
	 *
	 * @return Boolean
	 **/
	this.visible = function() {
		return node[0].elfinder && node.is(':visible');
	};
	
	/**
	 * Return file is root?
	 * 
	 * @param  Object  target file object
	 * @return Boolean
	 */
	this.isRoot = function(file) {
		return (file.isroot || ! file.phash)? true : false;
	}
	
	/**
	 * Return root dir hash for current working directory
	 * 
	 * @param  String   target hash
	 * @param  Boolean  include fake parent (optional)
	 * @return String
	 */
	this.root = function(hash, fake) {
		hash = hash || cwd;
		var dir, i;
		
		if (! fake) {
			$.each(self.roots, function(id, rhash) {
				if (hash.indexOf(id) === 0) {
					dir = rhash;
					return false;
				}
			});
			if (dir) {
				return dir;
			}
		}
		
		dir = files[hash];
		while (dir && dir.phash && (fake || ! dir.isroot)) {
			dir = files[dir.phash]
		}
		if (dir) {
			return dir.hash;
		}
		
		while (i in files && files.hasOwnProperty(i)) {
			dir = files[i]
			if (!dir.phash && !dir.mime == 'directory' && dir.read) {
				return dir.hash;
			}
		}
		
		return '';
	};
	
	/**
	 * Return current working directory info
	 * 
	 * @return Object
	 */
	this.cwd = function() {
		return files[cwd] || {};
	};
	
	/**
	 * Return required cwd option
	 * 
	 * @param  String  option name
	 * @param  String  target hash (optional)
	 * @return mixed
	 */
	this.option = function(name, target) {
		var res;
		target = target || cwd;
		if (self.optionsByHashes[target] && typeof self.optionsByHashes[target][name] !== 'undefined') {
			return self.optionsByHashes[target][name];
		}
		if (cwd !== target) {
			res = '';
			$.each(self.volOptions, function(id, opt) {
				if (target.indexOf(id) === 0) {
					res = opt[name] || '';
					return false;
				}
			});
			return res;
		} else {
			return cwdOptions[name] || '';
		}
	};
	
	/**
	 * Return disabled commands by each folder
	 * 
	 * @param  Array  target hashes
	 * @return Array
	 */
	this.getDisabledCmds = function(targets) {
		var disabled = ['hidden'];
		if (! Array.isArray(targets)) {
			targets = [ targets ];
		}
		$.each(targets, function(i, h) {
			var disCmds = self.option('disabled', h);
			if (disCmds) {
				$.each(disCmds, function(i, cmd) {
					if ($.inArray(cmd, disabled) === -1) {
						disabled.push(cmd);
					}
				});
			}
		});
		return disabled;
	}
	
	/**
	 * Return file data from current dir or tree by it's hash
	 * 
	 * @param  String  file hash
	 * @return Object
	 */
	this.file = function(hash) { 
		return hash? files[hash] : void(0); 
	};
	
	/**
	 * Return all cached files
	 * 
	 * @param  String  parent hash
	 * @return Object
	 */
	this.files = function(phash) {
		var items = {};
		if (phash) {
			if (!ownFiles[phash]) {
				return {};
			}
			$.each(ownFiles[phash], function(h) {
				if (files[h]) {
					items[h] = files[h];
				} else {
					delete ownFiles[phash][h];
				}
			});
			return Object.assign({}, items);
		}
		return Object.assign({}, files);
	};
	
	/**
	 * Return list of file parents hashes include file hash
	 * 
	 * @param  String  file hash
	 * @return Array
	 */
	this.parents = function(hash) {
		var parents = [],
			dir;
		
		while ((dir = this.file(hash))) {
			parents.unshift(dir.hash);
			hash = dir.phash;
		}
		return parents;
	};
	
	this.path2array = function(hash, i18) {
		var file, 
			path = [];
			
		while (hash) {
			if ((file = files[hash]) && file.hash) {
				path.unshift(i18 && file.i18 ? file.i18 : file.name);
				hash = file.isroot? null : file.phash;
			} else {
				path = [];
				break;
			}
		}
			
		return path;
	};
	
	/**
	 * Return file path or Get path async with jQuery.Deferred
	 * 
	 * @param  Object  file
	 * @param  Boolean i18
	 * @param  Object  asyncOpt
	 * @return String|jQuery.Deferred
	 */
	this.path = function(hash, i18, asyncOpt) { 
		var path = files[hash] && files[hash].path
			? files[hash].path
			: this.path2array(hash, i18).join(cwdOptions.separator);
		if (! asyncOpt || ! files[hash]) {
			return path;
		} else {
			asyncOpt = Object.assign({notify: {type : 'parents', cnt : 1, hideCnt : true}}, asyncOpt);
			
			var dfd    = $.Deferred(),
				notify = asyncOpt.notify,
				noreq  = false,
				req    = function() {
					self.request({
						data : {cmd : 'parents', target : files[hash].phash},
						notify : notify,
						preventFail : true
					})
					.done(done)
					.fail(function() {
						dfd.reject();
					});
				},
				done   = function() {
					self.one('parentsdone', function() {
						path = self.path(hash, i18);
						if (path === '' && noreq) {
							//retry with request
							noreq = false;
							req();
						} else {
							if (notify) {
								clearTimeout(ntftm);
								notify.cnt = -(parseInt(notify.cnt || 0));
								self.notify(notify);
							}
							dfd.resolve(path);
						}
					});
				},
				ntftm;
		
			if (path) {
				return dfd.resolve(path);
			} else {
				if (self.ui['tree']) {
					// try as no request
					if (notify) {
						ntftm = setTimeout(function() {
							self.notify(notify);
						}, self.notifyDelay);
					}
					noreq = true;
					done(true);
				} else {
					req();
				}
				return dfd;
			}
		}
	};
	
	/**
	 * Return file url if set
	 * 
	 * @param  String  file hash
	 * @param  Object  Options
	 * @return String
	 */
	this.url = function(hash, opts) {
		var file   = files[hash],
			opts   = opts || {},
			async  = opts.async || false,
			temp   = opts.temporary || false,
			dfrd   = async? $.Deferred() : null,
			getUrl = function(url) {
				if (url) {
					return url;
				}
				if (file.url) {
					return file.url;
				}
				
				baseUrl = (file.hash.indexOf(self.cwd().volumeid) === 0)? cwdOptions.url : self.option('url', file.hash);
				
				if (baseUrl) {
					return baseUrl + $.map(self.path2array(hash), function(n) { return encodeURIComponent(n); }).slice(1).join('/')
				}

				var params = Object.assign({}, self.customData, {
					cmd: 'file',
					target: file.hash
				});
				if (self.oldAPI) {
					params.cmd = 'open';
					params.current = file.phash;
				}
				return self.options.url + (self.options.url.indexOf('?') === -1 ? '?' : '&') + $.param(params, true);
			}, 
			baseUrl, res;
		
		if (!file || !file.read) {
			return async? dfrd.resolve('') : '';
		}
		
		if (file.url == '1') {
			this.request({
				data : { cmd : 'url', target : hash, options : { temporary: temp? 1 : 0 } },
				preventDefault : true,
				options: {async: async},
				notify: async? {type : temp? 'file' : 'url', cnt : 1, hideCnt : true} : {}
			})
			.done(function(data) {
				file.url = data.url || '';
			})
			.fail(function() {
				file.url = '';
			})
			.always(function() {
				var url;
				if (file.url && temp) {
					url = file.url;
					file.url = '1'; // restore
				}
				if (async) {
					dfrd.resolve(getUrl(url));
				} else {
					return getUrl(url);
				}
			});
		} else {
			if (async) {
				dfrd.resolve(getUrl());
			} else {
				return getUrl();
			}
		}
		
		if (async) {
			return dfrd;
		}
	};
	
	/**
	 * Return file url for open in elFinder
	 * 
	 * @param  String  file hash
	 * @param  Boolean for download link
	 * @return String
	 */
	this.openUrl = function(hash, download) {
		var file = files[hash],
			url  = '';
		
		if (!file || !file.read) {
			return '';
		}
		
		if (!download) {
			if (file.url) {
				if (file.url != 1) {
					return file.url;
				}
			} else if (cwdOptions.url && file.hash.indexOf(self.cwd().volumeid) === 0) {
				return cwdOptions.url + $.map(this.path2array(hash), function(n) { return encodeURIComponent(n); }).slice(1).join('/');
			}
		}
		
		url = this.options.url;
		url = url + (url.indexOf('?') === -1 ? '?' : '&')
			+ (this.oldAPI ? 'cmd=open&current='+file.phash : 'cmd=file')
			+ '&target=' + file.hash;
		
		if (download) {
			url += '&download=1';
		}
		
		$.each(this.options.customData, function(key, val) {
			url += '&' + encodeURIComponent(key) + '=' + encodeURIComponent(val);
		});
		
		return url;
	};
	
	/**
	 * Return thumbnail url
	 * 
	 * @param  Object  file object
	 * @return String
	 */
	this.tmb = function(file) {
		var tmbUrl, tmbCrop,
			cls    = 'elfinder-cwd-bgurl',
			url    = '';

		if ($.isPlainObject(file)) {
			if (self.searchStatus.state && file.hash.indexOf(self.cwd().volumeid) !== 0) {
				tmbUrl = self.option('tmbUrl', file.hash);
				tmbCrop = self.option('tmbCrop', file.hash);
			} else {
				tmbUrl = cwdOptions['tmbUrl'];
				tmbCrop = cwdOptions['tmbCrop'];
			}
			if (tmbCrop) {
				cls += ' elfinder-cwd-bgurl-crop';
			}
			if (tmbUrl === 'self' && file.mime.indexOf('image/') === 0) {
				url = self.openUrl(file.hash);
				cls += ' elfinder-cwd-bgself';
			} else if ((self.oldAPI || tmbUrl) && file && file.tmb && file.tmb != 1) {
				url = tmbUrl + file.tmb;
			}
			if (url) {
				return { url: url, className: cls };
			}
		}
		
		return false;
	};
	
	/**
	 * Return selected files hashes
	 *
	 * @return Array
	 **/
	this.selected = function() {
		return selected.slice(0);
	};
	
	/**
	 * Return selected files info
	 * 
	 * @return Array
	 */
	this.selectedFiles = function() {
		return $.map(selected, function(hash) { return files[hash] ? Object.assign({}, files[hash]) : null });
	};
	
	/**
	 * Return true if file with required name existsin required folder
	 * 
	 * @param  String  file name
	 * @param  String  parent folder hash
	 * @return Boolean
	 */
	this.fileByName = function(name, phash) {
		var hash;
	
		for (hash in files) {
			if (files.hasOwnProperty(hash) && files[hash].phash == phash && files[hash].name == name) {
				return files[hash];
			}
		}
	};
	
	/**
	 * Valid data for required command based on rules
	 * 
	 * @param  String  command name
	 * @param  Object  cammand's data
	 * @return Boolean
	 */
	this.validResponse = function(cmd, data) {
		return data.error || this.rules[this.rules[cmd] ? cmd : 'defaults'](data);
	};
	
	/**
	 * Return bytes from ini formated size
	 * 
	 * @param  String  ini formated size
	 * @return Integer
	 */
	this.returnBytes = function(val) {
		var last;
		if (isNaN(val)) {
			if (! val) {
				val = '';
			}
			// for ex. 1mb, 1KB
			val = val.replace(/b$/i, '');
			last = val.charAt(val.length - 1).toLowerCase();
			val = val.replace(/[tgmk]$/i, '');
			if (last == 't') {
				val = val * 1024 * 1024 * 1024 * 1024;
			} else if (last == 'g') {
				val = val * 1024 * 1024 * 1024;
			} else if (last == 'm') {
				val = val * 1024 * 1024;
			} else if (last == 'k') {
				val = val * 1024;
			}
			val = isNaN(val)? 0 : parseInt(val);
		} else {
			val = parseInt(val);
			if (val < 1) val = 0;
		}
		return val;
	};
	
	/**
	 * Proccess ajax request.
	 * Fired events :
	 * @todo
	 * @example
	 * @todo
	 * @return $.Deferred
	 */
	this.request = function(opts) { 
		var self     = this,
			o        = this.options,
			dfrd     = $.Deferred(),
			// request data
			data     = Object.assign({}, o.customData, {mimes : o.onlyMimes}, opts.data || opts),
			// command name
			cmd      = data.cmd,
			isOpen   = (!opts.asNotOpen && cmd === 'open'),
			// call default fail callback (display error dialog) ?
			deffail  = !(opts.preventDefault || opts.preventFail),
			// call default success callback ?
			defdone  = !(opts.preventDefault || opts.preventDone),
			// options for notify dialog
			notify   = Object.assign({}, opts.notify),
			// make cancel button
			cancel   = !!opts.cancel,
			// do not normalize data - return as is
			raw      = !!opts.raw,
			// sync files on request fail
			syncOnFail = opts.syncOnFail,
			// use lazy()
			lazy     = !!opts.lazy,
			// prepare function before done()
			prepare  = opts.prepare,
			// navigate option object when cmd done
			navigate = opts.navigate,
			// open notify dialog timeout
			timeout,
			// request options
			options = Object.assign({
				url      : o.url,
				async    : true,
				type     : this.requestType,
				dataType : 'json',
				cache    : false,
				// timeout  : 100,
				data     : data,
				headers  : this.customHeaders,
				xhrFields: this.xhrFields
			}, opts.options || {}),
			/**
			 * Default success handler. 
			 * Call default data handlers and fire event with command name.
			 *
			 * @param Object  normalized response data
			 * @return void
			 **/
			done = function(data) {
				data.warning && self.error(data.warning);
				
				if (isOpen) {
					open(data);
				} else {
					self.updateCache(data);
				}
				
				data.changed && data.changed.length && change(data.changed);
				
				self.lazy(function() {
					// fire some event to update cache/ui
					data.removed && data.removed.length && self.remove(data);
					data.added   && data.added.length   && self.add(data);
					data.changed && data.changed.length && self.change(data);
				}).then(function() {
					// fire event with command name
					return self.lazy(function() {
						self.trigger(cmd, data);
					});
				}).then(function() {
					// fire event with command name + 'done'
					return self.lazy(function() {
						self.trigger(cmd + 'done');
					});
				}).then(function() {
					// force update content
					data.sync && self.sync();
				});
			},
			/**
			 * Request error handler. Reject dfrd with correct error message.
			 *
			 * @param jqxhr  request object
			 * @param String request status
			 * @return void
			 **/
			error = function(xhr, status) {
				var error, data, 
					d = self.options.debug;
				
				switch (status) {
					case 'abort':
						error = xhr.quiet ? '' : ['errConnect', 'errAbort'];
						break;
					case 'timeout':	    
						error = ['errConnect', 'errTimeout'];
						break;
					case 'parsererror': 
						error = ['errResponse', 'errDataNotJSON'];
						if (xhr.responseText) {
							if (! cwd || (d && (d === 'all' || d['backend-error']))) {
								error.push(xhr.responseText);
							}
						}
						break;
					default:
						if (xhr.responseText) {
							// check responseText, Is that JSON?
							try {
								data = JSON.parse(xhr.responseText);
								if (data && data.error) {
									error = data.error;
								}
							} catch(e) {}
						}
						if (! error) {
							if (xhr.status == 403) {
								error = ['errConnect', 'errAccess', 'HTTP error ' + xhr.status];
							} else if (xhr.status == 404) {
								error = ['errConnect', 'errNotFound', 'HTTP error ' + xhr.status];
							} else if (xhr.status >= 500) {
								error = ['errResponse', 'errServerError', 'HTTP error ' + xhr.status];
							} else {
								if (xhr.status == 414 && options.type === 'get') {
									// retry by POST method
									options.type = 'post';
									dfrd.xhr = xhr = self.transport.send(options).fail(error).done(success);
									return;
								}
								error = xhr.quiet ? '' : ['errConnect', 'HTTP error ' + xhr.status];
							} 
						}
				}
				
				self.trigger(cmd + 'done');
				dfrd.reject(error, xhr, status);
			},
			/**
			 * Request success handler. Valid response data and reject/resolve dfrd.
			 *
			 * @param Object  response data
			 * @param String request status
			 * @return void
			 **/
			success = function(response) {
				var d = self.options.debug;
				
				// Set currrent request command name
				self.currentReqCmd = cmd;
				
				if (response.debug && (!d || (d !== 'all' && !d['backend-error']))) {
					if (!d) {
						self.options.debug = {};
					}
					self.options.debug['backend-error'] = true
				}
				
				if (raw) {
					response && response.debug && self.debug('backend-debug', response);
					return dfrd.resolve(response);
				}
				
				if (!response) {
					return dfrd.reject(['errResponse', 'errDataEmpty'], xhr, response);
				} else if (!$.isPlainObject(response)) {
					return dfrd.reject(['errResponse', 'errDataNotJSON'], xhr, response);
				} else if (response.error) {
					return dfrd.reject(response.error, xhr, response);
				}/* else if (!self.validResponse(cmd, response)) {
					return dfrd.reject('errResponse', xhr, response);
				}*/
				
				var resolve = function() {
					var pushLeafRoots = function(name) {
						if (self.leafRoots[data.target] && response[name]) {
							$.each(self.leafRoots[data.target], function(i, h) {
								var root;
								if (root = self.file(h)) {
									response[name].push(root);
								}
							});
						}
					},
					actionTarget;
					
					if (isOpen) {
						pushLeafRoots('files');
					} else if (cmd === 'tree') {
						pushLeafRoots('tree');
					}
					
					response = self.normalize(response);
					
					if (!self.validResponse(cmd, response)) {
						return dfrd.reject((response.norError || 'errResponse'), xhr, response);
					}
					
					if (!self.api) {
						self.api    = response.api || 1;
						if (self.api == '2.0' && typeof response.options.uploadMaxSize !== 'undefined') {
							self.api = '2.1';
						}
						self.newAPI = self.api >= 2;
						self.oldAPI = !self.newAPI;
					}
					
					if (response.options) {
						cwdOptions = Object.assign({}, cwdOptionsDefault, response.options);
					}

					if (response.netDrivers) {
						self.netDrivers = response.netDrivers;
					}

					if (response.maxTargets) {
						self.maxTargets = response.maxTargets;
					}

					if (isOpen && !!data.init) {
						self.uplMaxSize = self.returnBytes(response.uplMaxSize);
						self.uplMaxFile = !!response.uplMaxFile? parseInt(response.uplMaxFile) : 20;
					}

					if (typeof prepare === 'function') {
						prepare(response);
					}
					
					if (navigate) {
						actionTarget = navigate.target || 'added';
						if (response[actionTarget] && response[actionTarget].length) {
							self.one(cmd + 'done', function() {
								var targets  = response[actionTarget],
									newItems = self.findCwdNodes(targets),
									inCwdHashes = function() {
										var cwdHash = self.cwd().hash;
										return $.map(targets, function(f) { return (f.phash && cwdHash === f.phash)? f.hash : null; });
									},
									hashes   = inCwdHashes(),
									makeToast  = function(t) {
										var node = void(0),
											data = t.action? t.action.data : void(0),
											cmd, msg, done;
										if ((data || hashes.length) && t.action && (msg = t.action.msg) && (cmd = t.action.cmd) && (!t.action.cwdNot || t.action.cwdNot !== self.cwd().hash)) {
											done = t.action.done;
											data = t.action.data;
											node = $('<div/>')
												.append(
													$('<button type="button" class="ui-button ui-widget ui-state-default ui-corner-all elfinder-tabstop"><span class="ui-button-text">'
														+self.i18n(msg)
														+'</span></button>')
													.on('mouseenter mouseleave', function(e) { 
														$(this).toggleClass('ui-state-hover', e.type == 'mouseenter');
													})
													.on('click', function() {
														self.exec(cmd, data || hashes, { _currentType: 'toast', _currentNode: $(this) });
														if (done) {
															self.one(cmd+'done', function() {
																if (typeof done === 'function') {
																	done();
																} else if (done === 'select') {
																	self.trigger('selectfiles', {files : inCwdHashes()});
																}
															});
														}
													})
												);
										}
										delete t.action;
										t.extNode = node;
										return t;
									};
								
								if (! navigate.toast) {
									navigate.toast = {};
								}
								
								!navigate.noselect && self.trigger('selectfiles', {files : self.searchStatus.state > 1 ? $.map(targets, function(f) { return f.hash; }) : hashes});
								
								if (newItems.length) {
									if (!navigate.noscroll) {
										newItems.first().trigger('scrolltoview', {blink : false});
										self.resources.blink(newItems, 'lookme');
									}
									if ($.isPlainObject(navigate.toast.incwd)) {
										self.toast(makeToast(navigate.toast.incwd));
									}
								} else {
									if ($.isPlainObject(navigate.toast.inbuffer)) {
										self.toast(makeToast(navigate.toast.inbuffer));
									}
								}
							});
						}
					}
					
					dfrd.resolve(response);
					
					response.debug && self.debug('backend-debug', response);
				};
				
				lazy? self.lazy(resolve) : resolve();
			},
			xhr, _xhr,
			xhrAbort = function(e) {
				if (xhr && xhr.state() === 'pending') {
					xhr.quiet = true;
					xhr.abort();
					if (e && e.type != 'unload' && e.type != 'destroy') {
						self.autoSync();
					}
				}
			},
			abort = function(e){
				self.trigger(cmd + 'done');
				if (e.type == 'autosync') {
					if (e.data.action != 'stop') return;
				} else if (e.type != 'unload' && e.type != 'destroy' && e.type != 'openxhrabort') {
					if (!e.data.added || !e.data.added.length) {
						return;
					}
				}
				xhrAbort(e);
			},
			request = function() {
				if (isOpen) {
					if (requestQueueSkipOpen) {
						return dfrd.reject();
					}
					requestQueueSkipOpen = true;
				}
				
				requestCnt++;
				
				dfrd.fail(function(error, xhr, response) {
					xhrAbort();
					self.trigger(cmd + 'fail', response);
					if (error) {
						deffail ? self.error(error) : self.debug('error', self.i18n(error));
					}
					syncOnFail && self.sync();
				})

				if (!cmd) {
					syncOnFail = false;
					return dfrd.reject('errCmdReq');
				}
				
				if (self.maxTargets && data.targets && data.targets.length > self.maxTargets) {
					syncOnFail = false;
					return dfrd.reject(['errMaxTargets', self.maxTargets]);
				}

				defdone && dfrd.done(done);
				
				if (notify.type && notify.cnt) {
					if (cancel) {
						notify.cancel = dfrd;
					}
					timeout = setTimeout(function() {
						self.notify(notify);
						dfrd.always(function() {
							notify.cnt = -(parseInt(notify.cnt)||0);
							self.notify(notify);
						})
					}, self.notifyDelay)
					
					dfrd.always(function() {
						clearTimeout(timeout);
					});
				}
				
				// quiet abort not completed "open" requests
				if (isOpen) {
					while ((_xhr = queue.pop())) {
						if (_xhr.state() == 'pending') {
							_xhr.quiet = true;
							_xhr.abort();
						}
					}
					if (cwd !== data.target) {
						while ((_xhr = cwdQueue.pop())) {
							if (_xhr.state() == 'pending') {
								_xhr.quiet = true;
								_xhr.abort();
							}
						}
					}
				}

				// trigger abort autoSync for commands to add the item
				if ($.inArray(cmd, (self.cmdsToAdd + ' autosync').split(' ')) !== -1) {
					if (cmd !== 'autosync') {
						self.autoSync('stop');
						dfrd.always(function() {
							self.autoSync();
						});
					}
					self.trigger('openxhrabort');
				}

				delete options.preventFail

				dfrd.xhr = xhr = self.transport.send(options).always(function() {
					--requestCnt;
					if (requestQueue.length) {
						requestQueue.shift()();
					} else {
						requestQueueSkipOpen = false;
					} 
				}).fail(error).done(success);
				
				if (isOpen || (data.compare && cmd === 'info')) {
					// add autoSync xhr into queue
					queue.unshift(xhr);
					// bind abort()
					data.compare && self.bind(self.cmdsToAdd + ' autosync openxhrabort', abort);
					dfrd.always(function() {
						var ndx = $.inArray(xhr, queue);
						data.compare && self.unbind(self.cmdsToAdd + ' autosync openxhrabort', abort);
						ndx !== -1 && queue.splice(ndx, 1);
					});
				} else if ($.inArray(cmd, self.abortCmdsOnOpen) !== -1) {
					// add "open" xhr, only cwd xhr into queue
					cwdQueue.unshift(xhr);
					dfrd.always(function() {
						var ndx = $.inArray(xhr, cwdQueue);
						ndx !== -1 && cwdQueue.splice(ndx, 1);
					});
				}
				
				// abort pending xhr on window unload or elFinder destroy
				self.bind('unload destroy', abort);
				dfrd.always(function() {
					self.unbind('unload destroy', abort);
				});
				
				return dfrd;
			},
			queueingRequest = function() {
				if (isOpen) {
					requestQueueSkipOpen = false;
				}
				if (requestCnt < requestMaxConn) {
					// do request
					return request();
				} else {
					if (isOpen) {
						requestQueue.unshift(request);
					} else {
						requestQueue.push(request);
					}
					return dfrd;
				}
			},
			bindData = {opts: opts, result: true};
		
		// trigger "request.cmd" that callback be able to cancel request by substituting "false" for "event.data.result"
		self.trigger('request.' + cmd, bindData, true);
		
		if (! bindData.result) {
			self.trigger(cmd + 'done');
			return dfrd.reject();
		} else if (typeof bindData.result === 'object' && bindData.result.promise) {
			bindData.result
				.done(queueingRequest)
				.fail(function() {
					self.trigger(cmd + 'done');
					dfrd.reject();
				});
			return dfrd;
		}
		
		return queueingRequest();
	};
	
	/**
	 * Call cache()
	 * Store info about files/dirs in "files" object.
	 *
	 * @param  Array  files
	 * @return void
	 */
	this.cache = function(dataArray) {
		if (! Array.isArray(dataArray)) {
			dataArray = [ dataArray ];
		}
		cache(dataArray);
	};
	
	/**
	 * Update file object caches by respose data object
	 * 
	 * @param  Object  respose data object
	 * @return void
	 */
	this.updateCache = function(data) {
		if ($.isPlainObject(data)) {
			data.files && data.files.length && cache(data.files);
			data.tree && data.tree.length && cache(data.tree);
			data.removed && data.removed.length && remove(data.removed);
			data.added && data.added.length && cache(data.added);
			data.changed && data.changed.length && change(data.changed);
		}
	};
	
	/**
	 * Compare current files cache with new files and return diff
	 * 
	 * @param  Array   new files
	 * @param  String  target folder hash
	 * @param  Array   exclude properties to compare
	 * @return Object
	 */
	this.diff = function(incoming, onlydir, excludeProps) {
		var raw       = {},
			added     = [],
			removed   = [],
			changed   = [],
			isChanged = function(hash) {
				var l = changed.length;

				while (l--) {
					if (changed[l].hash == hash) {
						return true;
					}
				}
			};
			
		$.each(incoming, function(i, f) {
			raw[f.hash] = f;
		});
			
		// find removed
		$.each(files, function(hash, f) {
			if (! raw[hash] && (! onlydir || f.phash === onlydir)) {
				removed.push(hash);
			}
		});
		
		// compare files
		$.each(raw, function(hash, file) {
			var origin = files[hash];

			if (!origin) {
				added.push(file);
			} else {
				$.each(file, function(prop) {
					if (! excludeProps || $.inArray(prop, excludeProps) === -1) {
						if (file[prop] !== origin[prop]) {
							changed.push(file)
							return false;
						}
					}
				});
			}
		});
		
		// parents of removed dirs mark as changed (required for tree correct work)
		$.each(removed, function(i, hash) {
			var file  = files[hash], 
				phash = file.phash;

			if (phash 
			&& file.mime == 'directory' 
			&& $.inArray(phash, removed) === -1 
			&& raw[phash] 
			&& !isChanged(phash)) {
				changed.push(raw[phash]);
			}
		});
		
		return {
			added   : added,
			removed : removed,
			changed : changed
		};
	};
	
	/**
	 * Sync content
	 * 
	 * @return jQuery.Deferred
	 */
	this.sync = function(onlydir, polling) {
		this.autoSync('stop');
		var self  = this,
			compare = function(){
				var c = '', cnt = 0, mtime = 0;
				if (onlydir && polling) {
					$.each(files, function(h, f) {
						if (f.phash && f.phash === onlydir) {
							++cnt;
							mtime = Math.max(mtime, f.ts);
						}
						c = cnt+':'+mtime;
					});
				}
				return c;
			},
			comp  = compare(),
			dfrd  = $.Deferred().done(function() { self.trigger('sync'); }),
			opts = [this.request({
				data           : {cmd : 'open', reload : 1, target : cwd, tree : (! onlydir && this.ui.tree) ? 1 : 0, compare : comp},
				preventDefault : true
			})],
			exParents = function() {
				var parents = [],
					curRoot = self.file(self.root(cwd)),
					curId = curRoot? curRoot.volumeid : null,
					phash = self.cwd().phash,
					isroot,pdir;
				
				while(phash) {
					if (pdir = self.file(phash)) {
						if (phash.indexOf(curId) !== 0) {
							parents.push( {target: phash, cmd: 'tree'} );
							if (! self.isRoot(pdir)) {
								parents.push( {target: phash, cmd: 'parents'} );
							}
							curRoot = self.file(self.root(phash));
							curId = curRoot? curRoot.volumeid : null;
						}
						phash = pdir.phash;
					} else {
						phash = null;
					}
				}
				return parents;
			};
		
		if (! onlydir && self.api >= 2) {
			(cwd !== this.root()) && opts.push(this.request({
				data           : {cmd : 'parents', target : cwd},
				preventDefault : true
			}));
			$.each(exParents(), function(i, data) {
				opts.push(self.request({
					data           : {cmd : data.cmd, target : data.target},
					preventDefault : true
				}));
			});
		}
		$.when.apply($, opts)
		.fail(function(error, xhr) {
			if (! polling || $.inArray('errOpen', error) !== -1) {
				dfrd.reject(error);
				error && self.request({
					data   : {cmd : 'open', target : (self.lastDir('') || self.root()), tree : 1, init : 1},
					notify : {type : 'open', cnt : 1, hideCnt : true}
				});
			} else {
				dfrd.reject((error && xhr.status != 0)? error : void 0);
			}
		})
		.done(function(odata) {
			var pdata, argLen, i;
			
			if (odata.cwd.compare) {
				if (comp === odata.cwd.compare) {
					return dfrd.reject();
				}
			}
			
			// for 2nd and more requests
			pdata = {tree : []};
			
			// results marge of 2nd and more requests
			argLen = arguments.length;
			if (argLen > 1) {
				for(i = 1; i < argLen; i++) {
					if (arguments[i].tree && arguments[i].tree.length) {
						pdata.tree.push.apply(pdata.tree, arguments[i].tree);
					}
				}
			}
			
			if (self.api < 2.1) {
				if (! pdata.tree) {
					pdata.tree = [];
				}
				pdata.tree.push(odata.cwd);
			}
			
			// data normalize
			odata = self.normalize(odata);
			if (!self.validResponse('open', odata)) {
				return dfrd.reject((odata.norError || 'errResponse'));
			}
			pdata = self.normalize(pdata);
			if (!self.validResponse('tree', pdata)) {
				return dfrd.reject((pdata.norError || 'errResponse'));
			}
			
			var diff = self.diff(odata.files.concat(pdata && pdata.tree ? pdata.tree : []), onlydir);

			diff.added.push(odata.cwd);
			
			self.updateCache(diff);
			
			// trigger events
			diff.removed.length && self.remove(diff);
			diff.added.length   && self.add(diff);
			diff.changed.length && self.change(diff);
			return dfrd.resolve(diff);
		})
		.always(function() {
			self.autoSync();
		});
		
		return dfrd;
	};
	
	this.upload = function(files) {
		return this.transport.upload(files, this);
	};
	
	/**
	 * Arrays that has to unbind events
	 * 
	 * @type Object
	 */
	this.toUnbindEvents = {};
	
	/**
	 * Attach listener to events
	 * To bind to multiply events at once, separate events names by space
	 * 
	 * @param  String  event(s) name(s)
	 * @param  Object  event handler
	 * @return elFinder
	 */
	this.bind = function(event, callback) {
		var i, len;
		
		if (typeof(callback) == 'function') {
			event = ('' + event).toLowerCase().replace(/^\s+|\s+$/g, '').split(/\s+/);
			
			len = event.length;
			for (i = 0; i < len; i++) {
				if (listeners[event[i]] === void(0)) {
					listeners[event[i]] = [];
				}
				listeners[event[i]].push(callback);
			}
		}
		return this;
	};
	
	/**
	 * Remove event listener if exists
	 * To un-bind to multiply events at once, separate events names by space
	 *
	 * @param  String    event(s) name(s)
	 * @param  Function  callback
	 * @return elFinder
	 */
	this.unbind = function(event, callback) {
		var i, len, l, ci;
		
		event = ('' + event).toLowerCase().split(/\s+/);
		
		len = event.length;
		for (i = 0; i < len; i++) {
			if (l = listeners[event[i]]) {
				ci = $.inArray(callback, l);
				ci > -1 && l.splice(ci, 1);
			}
		}
		
		callback = null;
		return this;
	};
	
	/**
	 * Fire event - send notification to all event listeners
	 * In the callback `this` becames an event object
	 *
	 * @param  String   event type
	 * @param  Object   data to send across event
	 * @param  Boolean  allow modify data (call by reference of data)
	 * @return elFinder
	 */
	this.trigger = function(type, data, allowModify) {
		var type      = type.toLowerCase(),
			isopen    = (type === 'open'),
			dataIsObj = (typeof data === 'object'),
			handlers  = listeners[type] || [], i, l, jst, event;
		
		this.debug('event-'+type, data);
		
		allowModify = true;
		if (l = handlers.length) {
			event = $.Event(type);
			if (allowModify) {
				event.data = data;
			}

			for (i = 0; i < l; i++) {
				if (! handlers[i]) {
					// probably un-binded this handler
					continue;
				}
				// set `event.data` only callback has argument
				if (handlers[i].length) {
					if (!allowModify) {
						// to avoid data modifications. remember about "sharing" passing arguments in js :) 
						if (dataIsObj && !jst) {
							jst = JSON.stringify(data);
						}
						event.data = jst? JSON.parse(jst) : data;
					}
				}

				try {
					if (handlers[i].call(event, event, this) === false 
					|| event.isDefaultPrevented()) {
						this.debug('event-stoped', event.type);
						break;
					}
				} catch (ex) {
					window.console && window.console.log && window.console.log(ex);
				}
				
			}
			
			if (this.toUnbindEvents[type] && this.toUnbindEvents[type].length) {
				$.each(this.toUnbindEvents[type], function(i, v) {
					self.unbind(v.type, v.callback);
				});
				delete this.toUnbindEvents[type];
			}
		}
		return this;
	};
	
	/**
	 * Get event listeners
	 *
	 * @param  String   event type
	 * @return Array    listed event functions
	 */
	this.getListeners = function(event) {
		return event? listeners[event.toLowerCase()] : listeners;
	};
	
	/**
	 * Bind keybord shortcut to keydown event
	 *
	 * @example
	 *    elfinder.shortcut({ 
	 *       pattern : 'ctrl+a', 
	 *       description : 'Select all files', 
	 *       callback : function(e) { ... }, 
	 *       keypress : true|false (bind to keypress instead of keydown) 
	 *    })
	 *
	 * @param  Object  shortcut config
	 * @return elFinder
	 */
	this.shortcut = function(s) {
		var patterns, pattern, code, i, parts;
		
		if (this.options.allowShortcuts && s.pattern && $.isFunction(s.callback)) {
			patterns = s.pattern.toUpperCase().split(/\s+/);
			
			for (i= 0; i < patterns.length; i++) {
				pattern = patterns[i]
				parts   = pattern.split('+');
				code    = (code = parts.pop()).length == 1 
					? code > 0 ? code : code.charCodeAt(0) 
					: (code > 0 ? code : $.ui.keyCode[code]);

				if (code && !shortcuts[pattern]) {
					shortcuts[pattern] = {
						keyCode     : code,
						altKey      : $.inArray('ALT', parts)   != -1,
						ctrlKey     : $.inArray('CTRL', parts)  != -1,
						shiftKey    : $.inArray('SHIFT', parts) != -1,
						type        : s.type || 'keydown',
						callback    : s.callback,
						description : s.description,
						pattern     : pattern
					};
				}
			}
		}
		return this;
	};
	
	/**
	 * Registered shortcuts
	 *
	 * @type Object
	 **/
	this.shortcuts = function() {
		var ret = [];
		
		$.each(shortcuts, function(i, s) {
			ret.push([s.pattern, self.i18n(s.description)]);
		});
		return ret;
	};
	
	/**
	 * Get/set clipboard content.
	 * Return new clipboard content.
	 *
	 * @example
	 *   this.clipboard([]) - clean clipboard
	 *   this.clipboard([{...}, {...}], true) - put 2 files in clipboard and mark it as cutted
	 * 
	 * @param  Array    new files hashes
	 * @param  Boolean  cut files?
	 * @return Array
	 */
	this.clipboard = function(hashes, cut) {
		var map = function() { return $.map(clipboard, function(f) { return f.hash }); };

		if (hashes !== void(0)) {
			clipboard.length && this.trigger('unlockfiles', {files : map()});
			remember = {};
			
			clipboard = $.map(hashes||[], function(hash) {
				var file = files[hash];
				if (file) {
					
					remember[hash] = true;
					
					return {
						hash   : hash,
						phash  : file.phash,
						name   : file.name,
						mime   : file.mime,
						read   : file.read,
						locked : file.locked,
						cut    : !!cut
					}
				}
				return null;
			});
			this.trigger('changeclipboard', {clipboard : clipboard.slice(0, clipboard.length)});
			cut && this.trigger('lockfiles', {files : map()});
		}

		// return copy of clipboard instead of refrence
		return clipboard.slice(0, clipboard.length);
	};
	
	/**
	 * Return true if command enabled
	 * 
	 * @param  String       command name
	 * @param  String|void  hash for check of own volume's disabled cmds
	 * @return Boolean
	 */
	this.isCommandEnabled = function(name, dstHash) {
		var disabled,
			cvid = self.cwd().volumeid || '';
		
		// In serach results use selected item hash to check
		if (!dstHash && self.searchStatus.state > 1 && self.selected().length) {
			dstHash = self.selected()[0];
		}
		if (dstHash && (! cvid || dstHash.indexOf(cvid) !== 0)) {
			disabled = self.option('disabled', dstHash);
			if (! disabled) {
				disabled = [];
			}
		} else {
			disabled = cwdOptions.disabled;
		}
		return this._commands[name] ? $.inArray(name, disabled) === -1 : false;
	};
	
	/**
	 * Exec command and return result;
	 *
	 * @param  String         command name
	 * @param  String|Array   usualy files hashes
	 * @param  String|Array   command options
	 * @param  String|void    hash for enabled check of own volume's disabled cmds
	 * @return $.Deferred
	 */		
	this.exec = function(cmd, files, opts, dstHash) {
		if (cmd === 'open') {
			if (this.searchStatus.state || this.searchStatus.ininc) {
				this.trigger('searchend', { noupdate: true });
			}
			this.autoSync('stop');
		}
		return this._commands[cmd] && this.isCommandEnabled(cmd, dstHash) 
			? this._commands[cmd].exec(files, opts) 
			: $.Deferred().reject('No such command');
	};
	
	/**
	 * Create and return dialog.
	 *
	 * @param  String|DOMElement  dialog content
	 * @param  Object             dialog options
	 * @return jQuery
	 */
	this.dialog = function(content, options) {
		var dialog = $('<div/>').append(content).appendTo(node).elfinderdialog(options, this),
			dnode  = dialog.closest('.ui-dialog'),
			resize = function(){
				! dialog.data('draged') && dialog.is(':visible') && dialog.elfinderdialog('posInit');
			};
		if (dnode.length) {
			self.bind('resize', resize);
			dnode.on('remove', function() {
				self.unbind('resize', resize);
			});
		}
		return dialog;
	};
	
	/**
	 * Create and return toast.
	 *
	 * @param  Object  toast options - see ui/toast.js
	 * @return jQuery
	 */
	this.toast = function(options) {
		return $('<div class="ui-front"/>').appendTo(this.ui.toast).elfindertoast(options || {}, this);
	};
	
	/**
	 * Return UI widget or node
	 *
	 * @param  String  ui name
	 * @return jQuery
	 */
	this.getUI = function(ui) {
		return this.ui[ui] || node;
	};
	
	/**
	 * Return elFinder.command instance or instances array
	 *
	 * @param  String  command name
	 * @return Object | Array
	 */
	this.getCommand = function(name) {
		return name === void(0) ? this._commands : this._commands[name];
	};
	
	/**
	 * Resize elfinder node
	 * 
	 * @param  String|Number  width
	 * @param  String|Number  height
	 * @return void
	 */
	this.resize = function(w, h) {
		var getMargin = function() {
				var m = node.outerHeight(true) - node.innerHeight(),
					p = node;
				
				while(p.get(0) !== heightBase.get(0)) {
					p = p.parent();
					m += p.outerHeight(true) - p.innerHeight();
					if (! p.parent().length) {
						// reached the document
						break;
					}
				}
				return m;
			},
			fit = ! node.hasClass('ui-resizable'),
			prv = node.data('resizeSize') || {w: 0, h: 0},
			mt, size = {};

		if (heightBase && heightBase.data('resizeTm')) {
			clearTimeout(heightBase.data('resizeTm'));
		//	heightBase.off('resize.' + self.namespace, fitToBase);
		}
		
		if (typeof h === 'string') {
			if (mt = h.match(/^([0-9.]+)%$/)) {
				// setup heightBase
				if (! heightBase || ! heightBase.length) {
					heightBase = $(window);
				}
				if (! heightBase.data('marginToMyNode')) {
					heightBase.data('marginToMyNode', getMargin());
				}
				if (! heightBase.data('fitToBaseFunc')) {
					heightBase.data('fitToBaseFunc', function(e) {
						var tm = heightBase.data('resizeTm');
						e.preventDefault();
						e.stopPropagation();
						tm && clearTimeout(tm);
						if (! node.hasClass('elfinder-fullscreen')) {
							heightBase.data('resizeTm', setTimeout(function() {
								self.restoreSize();
							}, 50));
						}
					});
				}
				h = heightBase.height() * (mt[1] / 100) - heightBase.data('marginToMyNode');
				
				heightBase.off('resize.' + self.namespace, heightBase.data('fitToBaseFunc'));
				fit && heightBase.on('resize.' + self.namespace, heightBase.data('fitToBaseFunc'));
			}
		}
		
		node.css({ width : w, height : parseInt(h) });
		size.w = node.width();
		size.h = node.height();
		node.data('resizeSize', size);
		if (size.w !== prv.w || size.h !== prv.h) {
			node.trigger('resize');
			this.trigger('resize', {width : size.w, height : size.h});
		}
	};
	
	/**
	 * Restore elfinder node size
	 * 
	 * @return elFinder
	 */
	this.restoreSize = function() {
		this.resize(width, height);
	};
	
	this.show = function() {
		node.show();
		this.enable().trigger('show');
	};
	
	this.hide = function() {
		if (this.options.enableAlways) {
			prevEnabled = enabled;
			enabled = false;
		}
		this.disable().trigger('hide');
		node.hide();
	};
	
	/**
	 * Lazy execution function
	 * 
	 * @param  Object  function
	 * @param  Number  delay
	 * @param  Object  options
	 * @return Object  jQuery.Deferred
	 */
	this.lazy = function(func, delay, opts) {
		var busy = function(state) {
				var cnt = node.data('lazycnt'),
					repaint;
				
				if (state) {
					repaint = node.data('lazyrepaint')? false : opts.repaint;
					if (! cnt) {
						node.data('lazycnt', 1)
							.addClass('elfinder-processing');
					} else {
						node.data('lazycnt', ++cnt);
					}
					if (repaint) {
						node.data('lazyrepaint', true).css('display'); // force repaint
					}
				} else {
					if (cnt && cnt > 1) {
						node.data('lazycnt', --cnt);
					} else {
						repaint = node.data('lazyrepaint');
						node.data('lazycnt', 0)
							.removeData('lazyrepaint')
							.removeClass('elfinder-processing');
						repaint && node.css('display'); // force repaint;
						self.trigger('lazydone');
					}
				}
			},
			dfd  = $.Deferred();
		
		delay = delay || 0;
		opts = opts || {};
		busy(true);
		
		setTimeout(function() {
			dfd.resolve(func.call(dfd));
			busy(false);
		}, delay);
		
		return dfd;
	}
	
	/**
	 * Destroy this elFinder instance
	 *
	 * @return void
	 **/
	this.destroy = function() {
		if (node && node[0].elfinder) {
			node.hasClass('elfinder-fullscreen') && self.toggleFullscreen(node);
			this.options.syncStart = false;
			this.autoSync('forcestop');
			this.trigger('destroy').disable();
			clipboard = [];
			selected = [];
			listeners = {};
			shortcuts = {};
			$(window).off('.' + namespace);
			$(document).off('.' + namespace);
			self.trigger = function(){}
			$(beeper).remove();
			node.off()
				.removeData()
				.empty()
				.append(prevContent.contents())
				.attr('class', prevContent.attr('class'))
				.attr('style', prevContent.attr('style'));
			delete node[0].elfinder;
			// restore kept events
			$.each(prevEvents, function(n, arr) {
				$.each(arr, function(i, o) {
					node.on(o.type + (o.namespace? '.'+o.namespace : ''), o.selector, o.handler);
				});
			});
		}
	};
	
	/**
	 * Start or stop auto sync
	 * 
	 * @param  String|Bool  stop
	 * @return void
	 */
	this.autoSync = function(mode) {
		var sync;
		if (self.options.sync >= 1000) {
			if (syncInterval) {
				clearTimeout(syncInterval);
				syncInterval = null;
				self.trigger('autosync', {action : 'stop'});
			}
			
			if (mode === 'stop') {
				++autoSyncStop;
			} else {
				autoSyncStop = Math.max(0, --autoSyncStop);
			}
			
			if (autoSyncStop || mode === 'forcestop' || ! self.options.syncStart) {
				return;
			} 
			
			// run interval sync
			sync = function(start){
				var timeout;
				if (cwdOptions.syncMinMs && (start || syncInterval)) {
					start && self.trigger('autosync', {action : 'start'});
					timeout = Math.max(self.options.sync, cwdOptions.syncMinMs);
					syncInterval && clearTimeout(syncInterval);
					syncInterval = setTimeout(function() {
						var dosync = true, hash = cwd, cts;
						if (cwdOptions.syncChkAsTs && (cts = files[hash].ts)) {
							self.request({
								data           : {cmd : 'info', targets : [hash], compare : cts, reload : 1},
								preventDefault : true
							})
							.done(function(data){
								var ts;
								dosync = true;
								if (data.compare) {
									ts = data.compare;
									if (ts == cts) {
										dosync = false;
									}
								}
								if (dosync) {
									self.sync(hash).always(function(){
										if (ts) {
											// update ts for cache clear etc.
											files[hash].ts = ts;
										}
										sync();
									});
								} else {
									sync();
								}
							})
							.fail(function(error, xhr){
								if (error && xhr.status != 0) {
									self.error(error);
									if ($.inArray('errOpen', error) !== -1) {
										self.request({
											data   : {cmd : 'open', target : (self.lastDir('') || self.root()), tree : 1, init : 1},
											notify : {type : 'open', cnt : 1, hideCnt : true}
										});
									}
								} else {
									syncInterval = setTimeout(function() {
										sync();
									}, timeout);
								}
							});
						} else {
							self.sync(cwd, true).always(function(){
								sync();
							});
						}
					}, timeout);
				}
			};
			sync(true);
		}
	};
	
	/**
	 * Return bool is inside work zone of specific point
	 * 
	 * @param  Number event.pageX
	 * @param  Number event.pageY
	 * @return Bool
	 */
	this.insideWorkzone = function(x, y, margin) {
		var rectangle = this.getUI('workzone').data('rectangle');
		
		margin = margin || 1;
		if (x < rectangle.left + margin
		|| x > rectangle.left + rectangle.width + margin
		|| y < rectangle.top + margin
		|| y > rectangle.top + rectangle.height + margin) {
			return false;
		}
		return true;
	};
	
	/**
	 * Target ui node move to last of children of elFinder node fot to show front
	 * 
	 * @param  Object  target    Target jQuery node object
	 */
	this.toFront = function(target) {
		var lastnode = node.children(':last');
		target = $(target);
		if (lastnode.get(0) !== target.get(0)) {
			target.trigger('beforedommove')
				.insertAfter(lastnode)
				.trigger('dommove');
		}
	};
	
	/**
	 * Return css object for maximize
	 * 
	 * @return Object
	 */
	this.getMaximizeCss = function() {
		return {
			width   : '100%',
			height  : '100%',
			margin  : 0,
			padding : 0,
			top     : 0,
			left    : 0,
			display : 'block',
			position: 'fixed',
			zIndex  : Math.max(self.zIndex? (self.zIndex + 1) : 0 , 1000)
		};
	};
	
	// Closure for togglefullscreen
	(function() {
		// check is in iframe
		if (inFrame && self.UA.Fullscreen) {
			self.UA.Fullscreen = false;
			if (parentIframe && typeof parentIframe.attr('allowfullscreen') !== 'undefined') {
				self.UA.Fullscreen = true;
			}
		}

		var orgStyle, bodyOvf, resizeTm, fullElm, exitFull, toFull,
			cls = 'elfinder-fullscreen',
			clsN = 'elfinder-fullscreen-native',
			checkDialog = function() {
				var t = 0,
					l = 0;
				$.each(node.children('.ui-dialog,.ui-draggable'), function(i, d) {
					var $d = $(d),
						pos = $d.position();
					
					if (pos.top < 0) {
						$d.css('top', t);
						t += 20;
					}
					if (pos.left < 0) {
						$d.css('left', l);
						l += 20;
					}
				});
			},
			funcObj = self.UA.Fullscreen? {
				// native full screen mode
				
				fullElm: function() {
					return document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement || null;
				},
				
				exitFull: function() {
					if (document.exitFullscreen) {
						return document.exitFullscreen();
					} else if (document.webkitExitFullscreen) {
						return document.webkitExitFullscreen();
					} else if (document.mozCancelFullScreen) {
						return document.mozCancelFullScreen();
					} else if (document.msExitFullscreen) {
						return document.msExitFullscreen();
					}
				},
				
				toFull: function(elem) {
					if (elem.requestFullscreen) {
						return elem.requestFullscreen();
					} else if (elem.webkitRequestFullscreen) {
						return elem.webkitRequestFullscreen();
					} else if (elem.mozRequestFullScreen) {
						return elem.mozRequestFullScreen();
					} else if (elem.msRequestFullscreen) {
						return elem.msRequestFullscreen();
					}
					return false;
				}
			} : {
				// node element maximize mode
				
				fullElm: function() {
					var full;
					if (node.hasClass(cls)) {
						return node.get(0);
					} else {
						full = node.find('.' + cls);
						if (full.length) {
							return full.get(0);
						}
					}
					return null;
				},
				
				exitFull: function() {
					var elm;
					
					$(window).off('resize.' + namespace, resize);
					if (bodyOvf !== void(0)) {
						$('body').css('overflow', bodyOvf);
					}
					bodyOvf = void(0);
					
					if (orgStyle) {
						elm = orgStyle.elm;
						restoreStyle(elm);
						$(elm).trigger('resize', {fullscreen: 'off'});
					}
					
					$(window).trigger('resize');
				},
				
				toFull: function(elem) {
					bodyOvf = $('body').css('overflow') || '';
					$('body').css('overflow', 'hidden');
					
					$(elem).css(self.getMaximizeCss())
						.addClass(cls)
						.trigger('resize', {fullscreen: 'on'});
					
					checkDialog();
					
					$(window).on('resize.' + namespace, resize).trigger('resize');
					
					return true;
				}
			},
			restoreStyle = function(elem) {
				if (orgStyle && orgStyle.elm == elem) {
					$(elem).removeClass(cls + ' ' + clsN).attr('style', orgStyle.style);
					orgStyle = null;
				}
			},
			resize = function(e) {
				var elm;
				if (e.target === window) {
					resizeTm && clearTimeout(resizeTm);
					resizeTm = setTimeout(function() {
						if (elm = funcObj.fullElm()) {
							$(elm).trigger('resize', {fullscreen: 'on'});
						}
					}, 100);
				}
			};
		
		$(document).on('fullscreenchange.' + namespace + ' webkitfullscreenchange.' + namespace + ' mozfullscreenchange.' + namespace + ' MSFullscreenChange.' + namespace, function(e){
			if (self.UA.Fullscreen) {
				var elm = funcObj.fullElm(),
					win = $(window);
				
				resizeTm && clearTimeout(resizeTm);
				if (elm === null) {
					win.off('resize.' + namespace, resize);
					if (orgStyle) {
						elm = orgStyle.elm;
						restoreStyle(elm);
						$(elm).trigger('resize', {fullscreen: 'off'});
					}
				} else {
					$(elm).addClass(cls + ' ' + clsN)
						.attr('style', 'width:100%; height:100%; margin:0; padding:0;')
						.trigger('resize', {fullscreen: 'on'});
					win.on('resize.' + namespace, resize);
					checkDialog();
				}
				win.trigger('resize');
			}
		});
		
		/**
		 * Toggle Full Scrren Mode
		 * 
		 * @param  Object target
		 * @param  Bool   full
		 * @return Object | Null  DOM node object of current full scrren
		 */
		self.toggleFullscreen = function(target, full) {
			var elm = $(target).get(0),
				curElm = null;
			
			curElm = funcObj.fullElm();
			if (curElm) {
				if (curElm == elm) {
					if (full === true) {
						return curElm;
					}
				} else {
					if (full === false) {
						return curElm;
					}
				}
				funcObj.exitFull();
				return null;
			} else {
				if (full === false) {
					return null;
				}
			}
			
			orgStyle = {elm: elm, style: $(elm).attr('style')};
			if (funcObj.toFull(elm) !== false) {
				return elm;
			} else {
				orgStyle = null;
				return null;
			}
		};
	})();
	
	// Closure for toggleMaximize
	(function(){
		var cls = 'elfinder-maximized',
		resizeTm,
		resize = function(e) {
			if (e.target === window && e.data && e.data.elm) {
				var elm = e.data.elm;
				resizeTm && clearTimeout(resizeTm);
				resizeTm = setTimeout(function() {
					elm.trigger('resize', {maximize: 'on'});
				}, 100);
			}
		},
		exitMax = function(elm) {
			$(window).off('resize.' + namespace, resize);
			$('body').css('overflow', elm.data('bodyOvf'));
			elm.removeClass(cls)
				.attr('style', elm.data('orgStyle'))
				.removeData('bodyOvf')
				.removeData('orgStyle');
			elm.trigger('resize', {maximize: 'off'});
		},
		toMax = function(elm) {
			elm.data('bodyOvf', $('body').css('overflow') || '')
				.data('orgStyle', elm.attr('style'))
				.addClass(cls)
				.css(self.getMaximizeCss());
			$('body').css('overflow', 'hidden');
			$(window).on('resize.' + namespace, {elm: elm}, resize);
			elm.trigger('resize', {maximize: 'on'});
		};
		
		/**
		 * Toggle Maximize target node
		 * 
		 * @param  Object target
		 * @param  Bool   max
		 * @return void
		 */
		self.toggleMaximize = function(target, max) {
			var elm = $(target),
				maximized = elm.hasClass(cls);
			
			if (maximized) {
				if (max === true) {
					return;
				}
				exitMax(elm);
			} else {
				if (max === false) {
					return;
				}
				toMax(elm);
			}
		};
	})();
	
	/*************  init stuffs  ****************/
	
	// check jquery ui
	if (!($.fn.selectable && $.fn.draggable && $.fn.droppable)) {
		return alert(this.i18n('errJqui'));
	}

	// check node
	if (!node.length) {
		return alert(this.i18n('errNode'));
	}
	// check connector url
	if (!this.options.url) {
		return alert(this.i18n('errURL'));
	}

	Object.assign($.ui.keyCode, {
		'F1' : 112,
		'F2' : 113,
		'F3' : 114,
		'F4' : 115,
		'F5' : 116,
		'F6' : 117,
		'F7' : 118,
		'F8' : 119,
		'F9' : 120,
		'F10' : 121,
		'F11' : 122,
		'F12' : 123,
		'DIG0' : 48,
		'DIG1' : 49,
		'DIG2' : 50,
		'DIG3' : 51,
		'DIG4' : 52,
		'DIG5' : 53,
		'DIG6' : 54,
		'DIG7' : 55,
		'DIG8' : 56,
		'DIG9' : 57,
		'NUM0' : 96,
		'NUM1' : 97,
		'NUM2' : 98,
		'NUM3' : 99,
		'NUM4' : 100,
		'NUM5' : 101,
		'NUM6' : 102,
		'NUM7' : 103,
		'NUM8' : 104,
		'NUM9' : 105,
		'CONTEXTMENU' : 93
	});
	
	this.dragUpload = false;
	this.xhrUpload  = (typeof XMLHttpRequestUpload != 'undefined' || typeof XMLHttpRequestEventTarget != 'undefined') && typeof File != 'undefined' && typeof FormData != 'undefined';
	
	// configure transport object
	this.transport = {};

	if (typeof(this.options.transport) == 'object') {
		this.transport = this.options.transport;
		if (typeof(this.transport.init) == 'function') {
			this.transport.init(this)
		}
	}
	
	if (typeof(this.transport.send) != 'function') {
		this.transport.send = function(opts) { return $.ajax(opts); }
	}
	
	if (this.transport.upload == 'iframe') {
		this.transport.upload = $.proxy(this.uploads.iframe, this);
	} else if (typeof(this.transport.upload) == 'function') {
		this.dragUpload = !!this.options.dragUploadAllow;
	} else if (this.xhrUpload && !!this.options.dragUploadAllow) {
		this.transport.upload = $.proxy(this.uploads.xhr, this);
		this.dragUpload = true;
	} else {
		this.transport.upload = $.proxy(this.uploads.iframe, this);
	}

	/**
	 * Decoding 'raw' string converted to unicode
	 * 
	 * @param  String str
	 * @return String
	 */
	this.decodeRawString = $.isFunction(this.options.rawStringDecoder)? this.options.rawStringDecoder : function(str) {
		var charCodes = function(str) {
			var i, len, arr;
			for (i=0,len=str.length,arr=[]; i<len; i++) {
				arr.push(str.charCodeAt(i));
			}
			return arr;
		},
		scalarValues = function(arr) {
			var scalars = [], i, len, c;
			if (typeof arr === 'string') {arr = charCodes(arr);}
			for (i=0,len=arr.length; c=arr[i],i<len; i++) {
				if (c >= 0xd800 && c <= 0xdbff) {
					scalars.push((c & 1023) + 64 << 10 | arr[++i] & 1023);
				} else {
					scalars.push(c);
				}
			}
			return scalars;
		},
		decodeUTF8 = function(arr) {
			var i, len, c, str, char = String.fromCharCode;
			for (i=0,len=arr.length,str=""; c=arr[i],i<len; i++) {
				if (c <= 0x7f) {
					str += char(c);
				} else if (c <= 0xdf && c >= 0xc2) {
					str += char((c&31)<<6 | arr[++i]&63);
				} else if (c <= 0xef && c >= 0xe0) {
					str += char((c&15)<<12 | (arr[++i]&63)<<6 | arr[++i]&63);
				} else if (c <= 0xf7 && c >= 0xf0) {
					str += char(
						0xd800 | ((c&7)<<8 | (arr[++i]&63)<<2 | arr[++i]>>>4&3) - 64,
						0xdc00 | (arr[i++]&15)<<6 | arr[i]&63
					);
				} else {
					str += char(0xfffd);
				}
			}
			return str;
		};
		
		return decodeUTF8(scalarValues(str));
	};

	/**
	 * Alias for this.trigger('error', {error : 'message'})
	 *
	 * @param  String  error message
	 * @return elFinder
	 **/
	this.error = function() {
		var arg = arguments[0],
			opts = arguments[1] || null;
		return arguments.length == 1 && typeof(arg) == 'function'
			? self.bind('error', arg)
			: (arg === true? this : self.trigger('error', {error : arg, opts : opts}));
	};
	
	// create bind/trigger aliases for build-in events
	$.each(events, function(i, name) {
		self[name] = function() {
			var arg = arguments[0];
			return arguments.length == 1 && typeof(arg) == 'function'
				? self.bind(name, arg)
				: self.trigger(name, $.isPlainObject(arg) ? arg : {});
		}
	});

	// bind core event handlers
	this
		.enable(function() {
			if (!enabled && self.visible() && self.ui.overlay.is(':hidden') && ! node.children('.elfinder-dialog').find('.'+self.res('class', 'editing')).length) {
				enabled = true;
				document.activeElement && document.activeElement.blur();
				node.removeClass('elfinder-disabled');
			}
		})
		.disable(function() {
			prevEnabled = enabled;
			enabled = false;
			node.addClass('elfinder-disabled');
		})
		.open(function() {
			selected = [];
		})
		.select(function(e) {
			var cnt = 0,
				unselects = [];
			selected = $.map(e.data.selected || e.data.value|| [], function(hash) {
				if (unselects.length || (self.maxTargets && ++cnt > self.maxTargets)) {
					unselects.push(hash);
					return null;
				} else {
					return files[hash] ? hash : null;
				}
			});
			if (unselects.length) {
				self.trigger('unselectfiles', {files: unselects, inselect: true});
				self.toast({mode: 'warning', msg: self.i18n(['errMaxTargets', self.maxTargets])});
			}
		})
		.error(function(e) { 
			var opts  = {
					cssClass  : 'elfinder-dialog-error',
					title     : self.i18n(self.i18n('error')),
					resizable : false,
					destroyOnClose : true,
					buttons   : {}
			};
			
			opts.buttons[self.i18n(self.i18n('btnClose'))] = function() { $(this).elfinderdialog('close'); };

			if (e.data.opts && $.isPlainObject(e.data.opts)) {
				Object.assign(opts, e.data.opts);
			}

			self.dialog('<span class="elfinder-dialog-icon elfinder-dialog-icon-error"/>'+self.i18n(e.data.error), opts);
		})
		.bind('tmb', function(e) {
			$.each(e.data.images||[], function(hash, tmb) {
				if (files[hash]) {
					files[hash].tmb = tmb;
				}
			})
		})
		.bind('searchstart', function(e) {
			Object.assign(self.searchStatus, e.data);
			self.searchStatus.state = 1;
		})
		.bind('search', function(e) {
			self.searchStatus.state = 2;
		})
		.bind('searchend', function() {
			self.searchStatus.state = 0;
			self.searchStatus.ininc = false;
			self.searchStatus.mixed = false;
		})

		;

	// We listen and emit a sound on delete according to option
	if (true === this.options.sound) {
		this.bind('playsound', function(e) {
			var play  = beeper.canPlayType && beeper.canPlayType('audio/wav; codecs="1"'),
				file = e.data && e.data.soundFile;

			play && file && play != '' && play != 'no' && $(beeper).html('<source src="' + soundPath + file + '" type="audio/wav">')[0].play();
		});
	}

	// bind external event handlers
	$.each(this.options.handlers, function(event, callback) {
		self.bind(event, callback);
	});

	/**
	 * History object. Store visited folders
	 *
	 * @type Object
	 **/
	this.history = new this.history(this);
	
	/**
	 * Root hashed
	 * 
	 * @type Object
	 */
	this.roots = {};
	
	/**
	 * leaf roots
	 * 
	 * @type Object
	 */
	this.leafRoots = {};
	
	/**
	 * Loaded commands
	 *
	 * @type Object
	 **/
	this._commands = {};
	
	if (!Array.isArray(this.options.commands)) {
		this.options.commands = [];
	}
	
	if ($.inArray('*', this.options.commands) !== -1) {
		this.options.commands = Object.keys(this.commands);
	}
	
	/**
	 * UI command map of cwd volume ( That volume driver option `uiCmdMap` )
	 *
	 * @type Object
	 **/
	this.commandMap = {};
	
	/**
	 * cwd options of each volume
	 * key: volumeid
	 * val: options object
	 * 
	 * @type Object
	 */
	this.volOptions = {};

	/**
	 * Hash of trash holders
	 * key: trash folder hash
	 * val: source volume hash
	 * 
	 * @type Object
	 */
	this.trashes = {};

	/**
	 * cwd options of each folder/file
	 * key: hash
	 * val: options object
	 *
	 * @type Object
	 */
	this.optionsByHashes = {};
	
	/**
	 * UI Auto Hide Functions
	 * Each auto hide function mast be call to `fm.trigger('uiautohide')` at end of process
	 *
	 * @type Array
	 **/
	this.uiAutoHide = [];
	
	// trigger `uiautohide`
	this.one('open', function() {
		if (self.uiAutoHide.length) {
			setTimeout(function() {
				self.trigger('uiautohide');
			}, 500);
		}
	});
	
	// Auto Hide Functions sequential processing start
	this.bind('uiautohide', function() {
		if (self.uiAutoHide.length) {
			self.uiAutoHide.shift()();
		}
	});

	// make node resizable
	this.options.resizable 
	&& $.fn.resizable 
	&& node.resizable({
		resize    : function(e, ui) {
			self.resize(ui.size.width, ui.size.height);
		},
		handles   : 'se',
		minWidth  : 300,
		minHeight : 200
	});

	if (this.options.width) {
		width = this.options.width;
	}
	
	if (this.options.height) {
		height = this.options.height;
	}
	
	if (this.options.heightBase) {
		heightBase = $(this.options.heightBase);
	}
	
	if (this.options.soundPath) {
		soundPath = this.options.soundPath.replace(/\/+$/, '') + '/';
	}
	
	// attach events to document
	$(document)
		// disable elfinder on click outside elfinder
		.on('click.'+namespace, function(e) { enabled && ! self.options.enableAlways && !$(e.target).closest(node).length && self.disable(); })
		// exec shortcuts
		.on(keydown+' '+keypress, execShortcut);
	
	// attach events to window
	self.options.useBrowserHistory && $(window)
		.on('popstate.' + namespace, function(ev) {
			var target = ev.originalEvent.state && ev.originalEvent.state.thash;
			target && !$.isEmptyObject(self.files()) && self.request({
				data   : {cmd  : 'open', target : target, onhistory : 1},
				notify : {type : 'open', cnt : 1, hideCnt : true},
				syncOnFail : true
			});
		});
	
	(function(){
		var tm;
		$(window).on('resize.' + namespace, function(e){
			if (e.target === this) {
				tm && clearTimeout(tm);
				tm = setTimeout(function() {
					self.trigger('resize', {width : node.width(), height : node.height()});
				}, 100);
			}
		})
		.on('beforeunload.' + namespace,function(e){
			var msg, cnt;
			if (node.is(':visible')) {
				if (self.ui.notify.children().length && $.inArray('hasNotifyDialog', self.options.windowCloseConfirm) !== -1) {
					msg = self.i18n('ntfsmth');
				} else if (node.find('.'+self.res('class', 'editing')).length && $.inArray('editingFile', self.options.windowCloseConfirm) !== -1) {
					msg = self.i18n('editingFile');
				} else if ((cnt = Object.keys(self.selected()).length) && $.inArray('hasSelectedItem', self.options.windowCloseConfirm) !== -1) {
					msg = self.i18n('hasSelected', ''+cnt);
				} else if ((cnt = Object.keys(self.clipboard()).length) && $.inArray('hasClipboardData', self.options.windowCloseConfirm) !== -1) {
					msg = self.i18n('hasClipboard', ''+cnt);
				}
				if (msg) {
					e.returnValue = msg;
					return msg;
				}
			}
			self.trigger('unload');
		});
	})();

	// bind window onmessage for CORS
	$(window).on('message.' + namespace, function(e){
		var res = e.originalEvent || null,
			obj, data;
		if (res && self.uploadURL.indexOf(res.origin) === 0) {
			try {
				obj = JSON.parse(res.data);
				data = obj.data || null;
				if (data) {
					if (data.error) {
						if (obj.bind) {
							self.trigger(obj.bind+'fail', data);
						}
						self.error(data.error);
					} else {
						data.warning && self.error(data.warning);
						self.updateCache(data);
						data.removed && data.removed.length && self.remove(data);
						data.added   && data.added.length   && self.add(data);
						data.changed && data.changed.length && self.change(data);
						if (obj.bind) {
							self.trigger(obj.bind, data);
							self.trigger(obj.bind+'done');
						}
						data.sync && self.sync();
					}
				}
			} catch (e) {
				self.sync();
			}
		}
	});

	// elFinder enable always
	if (self.options.enableAlways) {
		$(window).on('focus.' + namespace, function(e){
			(e.target === this) && self.enable();
		});
		if (inFrame) {
			$(window.top).on('focus.' + namespace, function() {
				if (self.enable() && (! parentIframe || parentIframe.is(':visible'))) {
					setTimeout(function() {
						$(window).focus();
					}, 10);
				}
			});
		}
	} else if (inFrame) {
		$(window).on('blur.' + namespace, function(e){
			enabled && e.target === this && self.disable();
		});
	}

	// return focus to the window on click (elFInder in the frame)
	if (inFrame) {
		node.on('click', function(e) {
			$(window).focus();
		});
	}
	
	// elFinder to enable by mouse over
	if (this.options.enableByMouseOver) {
		node.on('mouseenter', function(e) {
			(inFrame) && $(window).focus();
			! self.enabled() && self.enable();
		});
	}

	// store instance in node
	node[0].elfinder = this;

	// auto load language file
	dfrdsBeforeBootup.push((function() {
		var lang   = self.lang,
			langJs = self.baseUrl + 'js/i18n/elfinder.' + lang + '.js',
			dfd    = $.Deferred().done(function() {
				if (self.i18[lang]) {
					self.lang = lang;
				}
				i18n = self.lang === 'en' 
					? self.i18['en'] 
					: $.extend(true, {}, self.i18['en'], self.i18[self.lang]);
				self.storage('lang', self.lang);
			});
		
		if (!self.i18[lang]) {
			self.lang = 'en';
			if (typeof define === 'function' && define.amd) {
				require([langJs], function() {
					dfd.resolve();
				}, function() {
					dfd.resolve();
				});
			} else {
				self.loadScript([langJs], function() {
					dfd.resolve();
				}, {
					loadType: 'tag',
					error : function() {
						dfd.resolve();
					}
				});
			}
		} else {
			dfd.resolve();
		}
		return dfd;
	})());
	
	// elFinder boot up function
	bootUp = function() {
		/**
		 * Interface direction
		 *
		 * @type String
		 * @default "ltr"
		 **/
		self.direction = i18n.direction;
		
		/**
		 * i18 messages
		 *
		 * @type Object
		 **/
		self.messages = i18n.messages;
		
		/**
		 * Date/time format
		 *
		 * @type String
		 * @default "m.d.Y"
		 **/
		self.dateFormat = self.options.dateFormat || i18n.dateFormat;
		
		/**
		 * Date format like "Yesterday 10:20:12"
		 *
		 * @type String
		 * @default "{day} {time}"
		 **/
		self.fancyFormat = self.options.fancyDateFormat || i18n.fancyDateFormat;
		
		/**
		 * Date format for if upload file has not original unique name
		 * e.g. Clipboard image data, Image data taken with iOS
		 *
		 * @type String
		 * @default "ymd-His"
		 **/
		self.nonameDateFormat = (self.options.nonameDateFormat || i18n.nonameDateFormat).replace(/[\/\\]/g, '_');

		/**
		 * Css classes 
		 *
		 * @type String
		 **/
		self.cssClass = 'ui-helper-reset ui-helper-clearfix ui-widget ui-widget-content ui-corner-all elfinder elfinder-'
				+(self.direction == 'rtl' ? 'rtl' : 'ltr')
				+(self.UA.Touch? (' elfinder-touch' + (self.options.resizable ? ' touch-punch' : '')) : '')
				+(self.UA.Mobile? ' elfinder-mobile' : '')
				+' '+self.options.cssClass;

		// prepare node
		node.addClass(self.cssClass)
			.on(mousedown, function() {
				!enabled && self.enable();
			});

		// draggable closure
		(function() {
			var ltr, wzRect, wzBottom, nodeStyle,
				keyEvt = keydown + 'draggable' + ' keyup.' + namespace + 'draggable';
			
			/**
			 * Base draggable options
			 *
			 * @type Object
			 **/
			self.draggable = {
				appendTo   : node,
				addClasses : false,
				distance   : 4,
				revert     : true,
				refreshPositions : false,
				cursor     : 'crosshair',
				cursorAt   : {left : 50, top : 47},
				scroll     : false,
				start      : function(e, ui) {
					var helper   = ui.helper,
						targets  = $.map(helper.data('files')||[], function(h) {
							if (h) {
								remember[h] = true;
								return h;
							}
							return null;
						}),
						locked   = false,
						cnt, h;
					
					// fix node size
					nodeStyle = node.attr('style');
					node.width(node.width()).height(node.height());
					
					// set var for drag()
					ltr = (self.direction === 'ltr');
					wzRect = self.getUI('workzone').data('rectangle');
					wzBottom = wzRect.top + wzRect.height;
					
					self.draggingUiHelper = helper;
					cnt = targets.length;
					while (cnt--) {
						h = targets[cnt];
						if (files[h].locked) {
							locked = true;
							helper.data('locked', true);
							break;
						}
					}
					!locked && self.trigger('lockfiles', {files : targets});
		
					helper.data('autoScrTm', setInterval(function() {
						if (helper.data('autoScr')) {
							self.autoScroll[helper.data('autoScr')](helper.data('autoScrVal'));
						}
					}, 50));
				},
				drag       : function(e, ui) {
					var helper = ui.helper,
						autoUp;
					
					if ((autoUp = wzRect.top > e.pageY) || wzBottom < e.pageY) {
						if (wzRect.cwdEdge > e.pageX) {
							helper.data('autoScr', (ltr? 'navbar' : 'cwd') + (autoUp? 'Up' : 'Down'));
						} else {
							helper.data('autoScr', (ltr? 'cwd' : 'navbar') + (autoUp? 'Up' : 'Down'));
						}
						helper.data('autoScrVal', Math.pow((autoUp? wzRect.top - e.pageY : e.pageY - wzBottom), 1.3));
					} else {
						if (helper.data('autoScr')) {
							helper.data('refreshPositions', 1).data('autoScr', null);
						}
					}
					if (helper.data('refreshPositions') && $(this).elfUiWidgetInstance('draggable')) {
						if (helper.data('refreshPositions') > 0) {
							$(this).draggable('option', { refreshPositions : true, elfRefresh : true });
							helper.data('refreshPositions', -1);
						} else {
							$(this).draggable('option', { refreshPositions : false, elfRefresh : false });
							helper.data('refreshPositions', null);
						}
					}
				},
				stop       : function(e, ui) {
					var helper = ui.helper,
						files;
					
					$(document).off(keyEvt);
					$(this).elfUiWidgetInstance('draggable') && $(this).draggable('option', { refreshPositions : false });
					self.draggingUiHelper = null;
					self.trigger('focus').trigger('dragstop');
					if (! helper.data('droped')) {
						files = $.map(helper.data('files')||[], function(h) { return h || null ;});
						self.trigger('unlockfiles', {files : files});
						self.trigger('selectfiles', {files : files});
					}
					self.enable();
					
					// restore node style
					node.attr('style', nodeStyle);
					
					helper.data('autoScrTm') && clearInterval(helper.data('autoScrTm'));
				},
				helper     : function(e, ui) {
					var element = this.id ? $(this) : $(this).parents('[id]:first'),
						helper  = $('<div class="elfinder-drag-helper"><span class="elfinder-drag-helper-icon-status"/></div>'),
						icon    = function(f) {
							var mime = f.mime, i, tmb = self.tmb(f);
							i = '<div class="elfinder-cwd-icon '+self.mime2class(mime)+' ui-corner-all"/>';
							if (tmb) {
								i = $(i).addClass(tmb.className).css('background-image', "url('"+tmb.url+"')").get(0).outerHTML;
							}
							return i;
						},
						hashes, l, ctr;
					
					self.draggingUiHelper && self.draggingUiHelper.stop(true, true);
					
					self.trigger('dragstart', {target : element[0], originalEvent : e});
					
					hashes = element.hasClass(self.res('class', 'cwdfile')) 
						? self.selected() 
						: [self.navId2Hash(element.attr('id'))];
					
					helper.append(icon(files[hashes[0]])).data('files', hashes).data('locked', false).data('droped', false).data('namespace', namespace).data('dropover', 0);
		
					if ((l = hashes.length) > 1) {
						helper.append(icon(files[hashes[l-1]]) + '<span class="elfinder-drag-num">'+l+'</span>');
					}
					
					$(document).on(keyEvt, function(e){
						var chk = (e.shiftKey||e.ctrlKey||e.metaKey);
						if (ctr !== chk) {
							ctr = chk;
							if (helper.is(':visible') && helper.data('dropover') && ! helper.data('droped')) {
								helper.toggleClass('elfinder-drag-helper-plus', helper.data('locked')? true : ctr);
								self.trigger(ctr? 'unlockfiles' : 'lockfiles', {files : hashes, helper: helper});
							}
						}
					});
					
					return helper;
				}
			};
		})();

		// in getFileCallback set - change default actions on double click/enter/ctrl+enter
		if (self.commands.getfile) {
			if (typeof(self.options.getFileCallback) == 'function') {
				self.bind('dblclick', function(e) {
					e.preventDefault();
					self.exec('getfile').fail(function() {
						self.exec('open', e.data && e.data.file? [ e.data.file ]: void(0));
					});
				});
				self.shortcut({
					pattern     : 'enter',
					description : self.i18n('cmdgetfile'),
					callback    : function() { self.exec('getfile').fail(function() { self.exec(self.OS == 'mac' ? 'rename' : 'open') }) }
				})
				.shortcut({
					pattern     : 'ctrl+enter',
					description : self.i18n(self.OS == 'mac' ? 'cmdrename' : 'cmdopen'),
					callback    : function() { self.exec(self.OS == 'mac' ? 'rename' : 'open') }
				});
			} else {
				self.options.getFileCallback = null;
			}
		}

		// load commands
		$.each(self.commands, function(name, cmd) {
			var proto = Object.assign({}, cmd.prototype),
				extendsCmd, opts;
			if ($.isFunction(cmd) && !self._commands[name] && (cmd.prototype.forceLoad || $.inArray(name, self.options.commands) !== -1)) {
				extendsCmd = cmd.prototype.extendsCmd || '';
				if (extendsCmd) {
					if ($.isFunction(self.commands[extendsCmd])) {
						cmd.prototype = Object.assign({}, base, new self.commands[extendsCmd](), cmd.prototype);
					} else {
						return true;
					}
				} else {
					cmd.prototype = Object.assign({}, base, cmd.prototype);
				}
				self._commands[name] = new cmd();
				cmd.prototype = proto;
				opts = self.options.commandsOptions[name] || {};
				if (extendsCmd && self.options.commandsOptions[extendsCmd]) {
					opts = $.extend(true, {}, self.options.commandsOptions[extendsCmd], opts);
				}
				self._commands[name].setup(name, opts);
				// setup linked commands
				if (self._commands[name].linkedCmds.length) {
					$.each(self._commands[name].linkedCmds, function(i, n) {
						var lcmd = self.commands[n];
						if ($.isFunction(lcmd) && !self._commands[n]) {
							lcmd.prototype = base;
							self._commands[n] = new lcmd();
							self._commands[n].setup(n, self.options.commandsOptions[n]||{});
						}
					});
				}
			}
		});

		/**
		 * UI nodes
		 *
		 * @type Object
		 **/
		self.ui = {
			// container for nav panel and current folder container
			workzone : $('<div/>').appendTo(node).elfinderworkzone(self),
			// container for folders tree / places
			navbar : $('<div/>').appendTo(node).elfindernavbar(self, self.options.uiOptions.navbar || {}),
			// contextmenu
			contextmenu : $('<div/>').appendTo(node).elfindercontextmenu(self),
			// overlay
			overlay : $('<div/>').appendTo(node).elfinderoverlay({
				show : function() { self.disable(); },
				hide : function() { prevEnabled && self.enable(); }
			}),
			// current folder container
			cwd : $('<div/>').appendTo(node).elfindercwd(self, self.options.uiOptions.cwd || {}),
			// notification dialog window
			notify : self.dialog('', {
				cssClass      : 'elfinder-dialog-notify',
				position      : self.options.notifyDialog.position,
				absolute      : true,
				resizable     : false,
				autoOpen      : false,
				closeOnEscape : false,
				title         : '&nbsp;',
				width         : parseInt(self.options.notifyDialog.width)
			}),
			statusbar : $('<div class="ui-widget-header ui-helper-clearfix ui-corner-bottom elfinder-statusbar"/>').hide().appendTo(node),
			toast : $('<div class="elfinder-toast"/>').appendTo(node),
			bottomtray : $('<div class="elfinder-bottomtray">').appendTo(node)
		};

		// load required ui
		$.each(self.options.ui || [], function(i, ui) {
			var name = 'elfinder'+ui,
				opts = self.options.uiOptions[ui] || {};
	
			if (!self.ui[ui] && $.fn[name]) {
				// regist to self.ui before make instance
				self.ui[ui] = $('<'+(opts.tag || 'div')+'/>').appendTo(node);
				self.ui[ui][name](self, opts);
			}
		});
		
		// update size	
		self.resize(width, height);

		(function() {
			var navbar = self.getUI('navbar'),
				cwd    = self.getUI('cwd').parent();
			
			self.autoScroll = {
				navbarUp   : function(v) {
					navbar.scrollTop(Math.max(0, navbar.scrollTop() - v));
				},
				navbarDown : function(v) {
					navbar.scrollTop(navbar.scrollTop() + v);
				},
				cwdUp     : function(v) {
					cwd.scrollTop(Math.max(0, cwd.scrollTop() - v));
				},
				cwdDown   : function(v) {
					cwd.scrollTop(cwd.scrollTop() + v);
				}
			};
		})();

		// Swipe on the touch devices to show/hide of toolbar or navbar
		if (self.UA.Touch) {
			(function() {
				var lastX, lastY, nodeOffset, nodeWidth, nodeTop, navbarW, toolbarH,
					navbar = self.getUI('navbar'),
					toolbar = self.getUI('toolbar'),
					moveEv = 'touchmove.stopscroll',
					moveTm,
					moveOn  = function(e) {
						e.preventDefault();
						moveTm && clearTimeout(moveTm);
					},
					moveOff = function() {
						moveTm = setTimeout(function() {
							node.off(moveEv);
						}, 100);
					},
					handleW, handleH = 50;

				node.on('touchstart touchmove touchend', function(e) {
					if (e.type === 'touchend') {
						lastX = false;
						lastY = false;
						moveOff();
						return;
					}
					
					var touches = e.originalEvent.touches || [{}],
						x = touches[0].pageX || null,
						y = touches[0].pageY || null,
						ltr = (self.direction === 'ltr'),
						navbarMode, treeWidth, swipeX, moveX, toolbarT, mode;
					
					if (x === null || y === null || (e.type === 'touchstart' && touches.length > 1)) {
						return;
					}
					
					if (e.type === 'touchstart') {
						nodeOffset = node.offset();
						nodeWidth = node.width();
						if (navbar) {
							lastX = false;
							if (navbar.is(':hidden')) {
								if (! handleW) {
									handleW = Math.max(50, nodeWidth / 10)
								}
								if ((ltr? (x - nodeOffset.left) : (nodeWidth + nodeOffset.left - x)) < handleW) {
									lastX = x;
								}
							} else {
								navbarW = navbar.width();
								treeWidth = Math.max.apply(Math, $.map(navbar.children('.elfinder-tree'), function(c){return $(c).width();}));
								if (ltr) {
									swipeX = (x < nodeOffset.left + navbarW && treeWidth - navbar.scrollLeft() - 5 <= navbarW);
								} else {
									swipeX = (x > nodeOffset.left + nodeWidth - navbarW && treeWidth + navbar.scrollLeft() - 5 <= navbarW);
								}
								if (swipeX) {
									handleW = Math.max(50, nodeWidth / 10);
									lastX = x;
								} else {
									lastX = false;
								}
							}
						}
						if (toolbar) {
							toolbarH = toolbar.height();
							nodeTop = nodeOffset.top;
							if (y - nodeTop < (toolbar.is(':hidden')? handleH : (toolbarH + 30))) {
								lastY = y;
								node.on(moveEv, moveOn);
								moveOff();
							} else {
								lastY = false;
							}
						}
					} else {
						if (navbar && lastX !== false) {
							navbarMode = (ltr? (lastX > x) : (lastX < x))? 'navhide' : 'navshow';
							moveX = Math.abs(lastX - x);
							if (navbarMode === 'navhide' && moveX > navbarW * .6
								|| (moveX > (navbarMode === 'navhide'? navbarW / 3 : 45)
									&& (navbarMode === 'navshow'
										|| (ltr? x < nodeOffset.left + 20 : x > nodeOffset.left + nodeWidth - 20)
									))
							) {
								self.getUI('navbar').trigger(navbarMode, {handleW: handleW});
								lastX = false;
							}
						}
						if (toolbar && lastY !== false ) {
							toolbarT = toolbar.offset().top;
							if (Math.abs(lastY - y) > Math.min(45, toolbarH / 3)) {
								mode = (lastY > y)? 'slideUp' : 'slideDown';
								if (mode === 'slideDown' || toolbarT + 20 > y) {
									if (toolbar.is(mode === 'slideDown' ? ':hidden' : ':visible')) {
										toolbar.stop(true, true).trigger('toggle', {duration: 100, handleH: handleH});
										moveOff();
									}
									lastY = false;
								}
							}
						}
					}
				});
			})();
		}

		if (self.dragUpload) {
			// add event listener for HTML5 DnD upload
			(function() {
				var isin = function(e) {
					return (e.target.nodeName !== 'TEXTAREA' && e.target.nodeName !== 'INPUT' && $(e.target).closest('div.ui-dialog-content').length === 0);
				},
				ent       = 'native-drag-enter',
				disable   = 'native-drag-disable',
				c         = 'class',
				navdir    = self.res(c, 'navdir'),
				droppable = self.res(c, 'droppable'),
				dropover  = self.res(c, 'adroppable'),
				arrow     = self.res(c, 'navarrow'),
				clDropActive = self.res(c, 'adroppable'),
				wz        = self.getUI('workzone'),
				ltr       = (self.direction === 'ltr'),
				clearTm   = function() {
					autoScrTm && clearTimeout(autoScrTm);
					autoScrTm = null;
				},
				wzRect, autoScrFn, autoScrTm;
				
				node.on('dragenter', function(e) {
					clearTm();
					if (isin(e)) {
						e.preventDefault();
						e.stopPropagation();
						wzRect = wz.data('rectangle');
					}
				})
				.on('dragleave', function(e) {
					clearTm();
					if (isin(e)) {
						e.preventDefault();
						e.stopPropagation();
					}
				})
				.on('dragover', function(e) {
					var autoUp;
					if (isin(e)) {
						e.preventDefault();
						e.stopPropagation();
						e.originalEvent.dataTransfer.dropEffect = 'none';
						if (! autoScrTm) {
							autoScrTm = setTimeout(function() {
								var wzBottom = wzRect.top + wzRect.height,
									fn;
								if ((autoUp = e.pageY < wzRect.top) || e.pageY > wzBottom ) {
									if (wzRect.cwdEdge > e.pageX) {
										fn = (ltr? 'navbar' : 'cwd') + (autoUp? 'Up' : 'Down');
									} else {
										fn = (ltr? 'cwd' : 'navbar') + (autoUp? 'Up' : 'Down');
									}
									self.autoScroll[fn](Math.pow((autoUp? wzRect.top - e.pageY : e.pageY - wzBottom), 1.3));
								}
								autoScrTm = null;
							}, 20);
						}
					} else {
						clearTm();
					}
				})
				.on('drop', function(e) {
					clearTm();
					if (isin(e)) {
						e.stopPropagation();
						e.preventDefault();
					}
				});
				
				node.on('dragenter', '.native-droppable', function(e){
					if (e.originalEvent.dataTransfer) {
						var $elm = $(e.currentTarget),
							id   = e.currentTarget.id || null,
							cwd  = null,
							elfFrom;
						if (!id) { // target is cwd
							cwd = self.cwd();
							$elm.data(disable, false);
							try {
								$.each(e.originalEvent.dataTransfer.types, function(i, v){
									if (v.substr(0, 13) === 'elfinderfrom:') {
										elfFrom = v.substr(13).toLowerCase();
									}
								});
							} catch(e) {}
						}
						if (!cwd || (cwd.write && (!elfFrom || elfFrom !== (window.location.href + cwd.hash).toLowerCase()))) {
							e.preventDefault();
							e.stopPropagation();
							$elm.data(ent, true);
							$elm.addClass(clDropActive);
						} else {
							$elm.data(disable, true);
						}
					}
				})
				.on('dragleave', '.native-droppable', function(e){
					if (e.originalEvent.dataTransfer) {
						var $elm = $(e.currentTarget);
						e.preventDefault();
						e.stopPropagation();
						if ($elm.data(ent)) {
							$elm.data(ent, false);
						} else {
							$elm.removeClass(clDropActive);
						}
					}
				})
				.on('dragover', '.native-droppable', function(e){
					if (e.originalEvent.dataTransfer) {
						var $elm = $(e.currentTarget);
						e.preventDefault();
						e.stopPropagation();
						e.originalEvent.dataTransfer.dropEffect = $elm.data(disable)? 'none' : 'copy';
						$elm.data(ent, false);
					}
				})
				.on('drop', '.native-droppable', function(e){
					if (e.originalEvent && e.originalEvent.dataTransfer) {
						var $elm = $(e.currentTarget)
							id;
						e.preventDefault();
						e.stopPropagation();
						$elm.removeClass(clDropActive);
						if (e.currentTarget.id) {
							id = $elm.hasClass(navdir)? self.navId2Hash(e.currentTarget.id) : self.cwdId2Hash(e.currentTarget.id);
						} else {
							id = self.cwd().hash;
						}
						e.originalEvent._target = id;
						self.exec('upload', {dropEvt: e.originalEvent, target: id}, void 0, id);
					}
				});
			})();
		}

		// trigger event cssloaded if cddAutoLoad disabled
		if (! self.options.cssAutoLoad) {
			self.cssloaded = true;
			self.trigger('cssloaded');
		}

		// calculate elFinder node z-index
		self.zIndexCalc();

		// send initial request and start to pray >_<
		self.trigger('init')
			.request({
				data        : {cmd : 'open', target : self.startDir(), init : 1, tree : self.ui.tree ? 1 : 0}, 
				preventDone : true,
				notify      : {type : 'open', cnt : 1, hideCnt : true},
				freeze      : true
			})
			.fail(function() {
				self.trigger('fail').disable().lastDir('');
				listeners = {};
				shortcuts = {};
				$(document).add(node).off('.'+namespace);
				self.trigger = function() { };
			})
			.done(function(data) {
				var trashDisable = function(th) {
						var src = self.file(self.trashes[th]),
							d = self.options.debug,
							error;
						
						if (src && src.volumeid) {
							delete self.volOptions[src.volumeid].trashHash;
						}
						self.trashes[th] = false;
						self.debug('backend-error', 'Trash hash "'+th+'" was not found or not writable.');
					},
					toChkTh = {};
				
				// re-calculate elFinder node z-index
				self.zIndexCalc();
				
				self.load().debug('api', self.api);
				// update ui's size after init
				node.trigger('resize');
				// initial open
				open(data);
				self.trigger('open', data);
				self.trigger('opendone');
				
				if (inFrame && self.options.enableAlways) {
					$(window).focus();
				}
				
				// check self.trashes
				$.each(self.trashes, function(th) {
					var dir = self.file(th),
						src;
					if (! dir) {
						toChkTh[th] = true;
					} else if (dir.mime !== 'directory' || ! dir.write) {
						trashDisable(th);
					}
				});
				if (Object.keys(toChkTh).length) {
					self.request({
						data : {cmd : 'info', targets : Object.keys(toChkTh)},
						preventDefault : true
					}).done(function(data) {
						if (data && data.files) {
							$.each(data.files, function(i, dir) {
								if (dir.mime === 'directory' && dir.write) {
									delete toChkTh[dir.hash];
								}
							});
						}
					}).always(function() {
						$.each(toChkTh, trashDisable);
					})
				}
				
			});
		// self.timeEnd('load');
		// End of bootUp()
	};
	
	// call bootCallback function with elFinder instance, extraObject - { dfrdsBeforeBootup: dfrdsBeforeBootup }
	if (bootCallback && typeof bootCallback === 'function') {
		self.bootCallback = bootCallback;
		bootCallback.call(node.get(0), self, { dfrdsBeforeBootup: dfrdsBeforeBootup });
	}
	
	// call dfrdsBeforeBootup functions then boot up elFinder
	$.when.apply(null, dfrdsBeforeBootup).done(function() {
		bootUp();
	}).fail(function(error) {
		self.error(error);
	});
};

//register elFinder to global scope
if (typeof toGlobal === 'undefined' || toGlobal) {
	window.elFinder = elFinder;
}

/**
 * Prototype
 * 
 * @type  Object
 */
elFinder.prototype = {
	
	uniqueid : 0,
	
	res : function(type, id) {
		return this.resources[type] && this.resources[type][id];
	}, 

	/**
	 * User os. Required to bind native shortcuts for open/rename
	 *
	 * @type String
	 **/
	OS : navigator.userAgent.indexOf('Mac') !== -1 ? 'mac' : navigator.userAgent.indexOf('Win') !== -1  ? 'win' : 'other',
	
	/**
	 * User browser UA.
	 * jQuery.browser: version deprecated: 1.3, removed: 1.9
	 *
	 * @type Object
	 **/
	UA : (function(){
		var webkit = !document.uniqueID && !window.opera && !window.sidebar && window.localStorage && 'WebkitAppearance' in document.documentElement.style;
		return {
			// Browser IE <= IE 6
			ltIE6   : typeof window.addEventListener == "undefined" && typeof document.documentElement.style.maxHeight == "undefined",
			// Browser IE <= IE 7
			ltIE7   : typeof window.addEventListener == "undefined" && typeof document.querySelectorAll == "undefined",
			// Browser IE <= IE 8
			ltIE8   : typeof window.addEventListener == "undefined" && typeof document.getElementsByClassName == "undefined",
			IE      : document.uniqueID,
			Firefox : window.sidebar,
			Opera   : window.opera,
			Webkit  : webkit,
			Chrome  : webkit && window.chrome,
			Safari  : webkit && !window.chrome,
			Mobile  : typeof window.orientation != "undefined",
			Touch   : typeof window.ontouchstart != "undefined",
			iOS     : navigator.platform.match(/^iP(?:[ao]d|hone)/),
			Fullscreen : (typeof (document.exitFullscreen || document.webkitExitFullscreen || document.mozCancelFullScreen || document.msExitFullscreen) !== 'undefined')
		};
	})(),
	
	/**
	 * Current request command
	 * 
	 * @type  String
	 */
	currentReqCmd : '',
	
	/**
	 * Internationalization object
	 * 
	 * @type  Object
	 */
	i18 : {
		en : {
			translator      : '',
			language        : 'English',
			direction       : 'ltr',
			dateFormat      : 'd.m.Y H:i',
			fancyDateFormat : '$1 H:i',
			nonameDateFormat : 'ymd-His',
			messages        : {}
		},
		months : ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
		monthsShort : ['msJan', 'msFeb', 'msMar', 'msApr', 'msMay', 'msJun', 'msJul', 'msAug', 'msSep', 'msOct', 'msNov', 'msDec'],

		days : ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
		daysShort : ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
	},
	
	/**
	 * File mimetype to kind mapping
	 * 
	 * @type  Object
	 */
	kinds : 	{
			'unknown'                       : 'Unknown',
			'directory'                     : 'Folder',
			'symlink'                       : 'Alias',
			'symlink-broken'                : 'AliasBroken',
			'application/x-empty'           : 'TextPlain',
			'application/postscript'        : 'Postscript',
			'application/vnd.ms-office'     : 'MsOffice',
			'application/msword'            : 'MsWord',
			'application/vnd.ms-word'       : 'MsWord',
			'application/vnd.openxmlformats-officedocument.wordprocessingml.document' : 'MsWord',
			'application/vnd.ms-word.document.macroEnabled.12'                        : 'MsWord',
			'application/vnd.openxmlformats-officedocument.wordprocessingml.template' : 'MsWord',
			'application/vnd.ms-word.template.macroEnabled.12'                        : 'MsWord',
			'application/vnd.ms-excel'      : 'MsExcel',
			'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'       : 'MsExcel',
			'application/vnd.ms-excel.sheet.macroEnabled.12'                          : 'MsExcel',
			'application/vnd.openxmlformats-officedocument.spreadsheetml.template'    : 'MsExcel',
			'application/vnd.ms-excel.template.macroEnabled.12'                       : 'MsExcel',
			'application/vnd.ms-excel.sheet.binary.macroEnabled.12'                   : 'MsExcel',
			'application/vnd.ms-excel.addin.macroEnabled.12'                          : 'MsExcel',
			'application/vnd.ms-powerpoint' : 'MsPP',
			'application/vnd.openxmlformats-officedocument.presentationml.presentation' : 'MsPP',
			'application/vnd.ms-powerpoint.presentation.macroEnabled.12'              : 'MsPP',
			'application/vnd.openxmlformats-officedocument.presentationml.slideshow'  : 'MsPP',
			'application/vnd.ms-powerpoint.slideshow.macroEnabled.12'                 : 'MsPP',
			'application/vnd.openxmlformats-officedocument.presentationml.template'   : 'MsPP',
			'application/vnd.ms-powerpoint.template.macroEnabled.12'                  : 'MsPP',
			'application/vnd.ms-powerpoint.addin.macroEnabled.12'                     : 'MsPP',
			'application/vnd.openxmlformats-officedocument.presentationml.slide'      : 'MsPP',
			'application/vnd.ms-powerpoint.slide.macroEnabled.12'                     : 'MsPP',
			'application/pdf'               : 'PDF',
			'application/xml'               : 'XML',
			'application/vnd.oasis.opendocument.text' : 'OO',
			'application/vnd.oasis.opendocument.text-template'         : 'OO',
			'application/vnd.oasis.opendocument.text-web'              : 'OO',
			'application/vnd.oasis.opendocument.text-master'           : 'OO',
			'application/vnd.oasis.opendocument.graphics'              : 'OO',
			'application/vnd.oasis.opendocument.graphics-template'     : 'OO',
			'application/vnd.oasis.opendocument.presentation'          : 'OO',
			'application/vnd.oasis.opendocument.presentation-template' : 'OO',
			'application/vnd.oasis.opendocument.spreadsheet'           : 'OO',
			'application/vnd.oasis.opendocument.spreadsheet-template'  : 'OO',
			'application/vnd.oasis.opendocument.chart'                 : 'OO',
			'application/vnd.oasis.opendocument.formula'               : 'OO',
			'application/vnd.oasis.opendocument.database'              : 'OO',
			'application/vnd.oasis.opendocument.image'                 : 'OO',
			'application/vnd.openofficeorg.extension'                  : 'OO',
			'application/x-shockwave-flash' : 'AppFlash',
			'application/flash-video'       : 'Flash video',
			'application/x-bittorrent'      : 'Torrent',
			'application/javascript'        : 'JS',
			'application/rtf'               : 'RTF',
			'application/rtfd'              : 'RTF',
			'application/x-font-ttf'        : 'TTF',
			'application/x-font-otf'        : 'OTF',
			'application/x-rpm'             : 'RPM',
			'application/x-web-config'      : 'TextPlain',
			'application/xhtml+xml'         : 'HTML',
			'application/docbook+xml'       : 'DOCBOOK',
			'application/x-awk'             : 'AWK',
			'application/x-gzip'            : 'GZIP',
			'application/x-bzip2'           : 'BZIP',
			'application/x-xz'              : 'XZ',
			'application/zip'               : 'ZIP',
			'application/x-zip'               : 'ZIP',
			'application/x-rar'             : 'RAR',
			'application/x-tar'             : 'TAR',
			'application/x-7z-compressed'   : '7z',
			'application/x-jar'             : 'JAR',
			'text/plain'                    : 'TextPlain',
			'text/x-php'                    : 'PHP',
			'text/html'                     : 'HTML',
			'text/javascript'               : 'JS',
			'text/css'                      : 'CSS',
			'text/rtf'                      : 'RTF',
			'text/rtfd'                     : 'RTF',
			'text/x-c'                      : 'C',
			'text/x-csrc'                   : 'C',
			'text/x-chdr'                   : 'CHeader',
			'text/x-c++'                    : 'CPP',
			'text/x-c++src'                 : 'CPP',
			'text/x-c++hdr'                 : 'CPPHeader',
			'text/x-shellscript'            : 'Shell',
			'application/x-csh'             : 'Shell',
			'text/x-python'                 : 'Python',
			'text/x-java'                   : 'Java',
			'text/x-java-source'            : 'Java',
			'text/x-ruby'                   : 'Ruby',
			'text/x-perl'                   : 'Perl',
			'text/x-sql'                    : 'SQL',
			'text/xml'                      : 'XML',
			'text/x-comma-separated-values' : 'CSV',
			'text/x-markdown'               : 'Markdown',
			'image/x-ms-bmp'                : 'BMP',
			'image/jpeg'                    : 'JPEG',
			'image/gif'                     : 'GIF',
			'image/png'                     : 'PNG',
			'image/tiff'                    : 'TIFF',
			'image/x-targa'                 : 'TGA',
			'image/vnd.adobe.photoshop'     : 'PSD',
			'image/xbm'                     : 'XBITMAP',
			'image/pxm'                     : 'PXM',
			'audio/mpeg'                    : 'AudioMPEG',
			'audio/midi'                    : 'AudioMIDI',
			'audio/ogg'                     : 'AudioOGG',
			'audio/mp4'                     : 'AudioMPEG4',
			'audio/x-m4a'                   : 'AudioMPEG4',
			'audio/wav'                     : 'AudioWAV',
			'audio/x-mp3-playlist'          : 'AudioPlaylist',
			'video/x-dv'                    : 'VideoDV',
			'video/mp4'                     : 'VideoMPEG4',
			'video/mpeg'                    : 'VideoMPEG',
			'video/x-msvideo'               : 'VideoAVI',
			'video/quicktime'               : 'VideoMOV',
			'video/x-ms-wmv'                : 'VideoWM',
			'video/x-flv'                   : 'VideoFlash',
			'video/x-matroska'              : 'VideoMKV',
			'video/ogg'                     : 'VideoOGG'
		},
	
	/**
	 * Ajax request data validation rules
	 * 
	 * @type  Object
	 */
	rules : {
		defaults : function(data) {
			if (!data
			|| (data.added && !Array.isArray(data.added))
			||  (data.removed && !Array.isArray(data.removed))
			||  (data.changed && !Array.isArray(data.changed))) {
				return false;
			}
			return true;
		},
		open    : function(data) { return data && data.cwd && data.files && $.isPlainObject(data.cwd) && Array.isArray(data.files); },
		tree    : function(data) { return data && data.tree && Array.isArray(data.tree); },
		parents : function(data) { return data && data.tree && Array.isArray(data.tree); },
		tmb     : function(data) { return data && data.images && ($.isPlainObject(data.images) || Array.isArray(data.images)); },
		upload  : function(data) { return data && ($.isPlainObject(data.added) || Array.isArray(data.added));},
		search  : function(data) { return data && data.files && Array.isArray(data.files)}
	},
	
	/**
	 * Commands costructors
	 *
	 * @type Object
	 */
	commands : {},
	
	/**
	 * Commands to add the item (space delimited)
	 * 
	 * @type String
	 */
	cmdsToAdd : 'archive duplicate extract mkdir mkfile paste rm upload',
	
	parseUploadData : function(text) {
		var data;
		
		if (!$.trim(text)) {
			return {error : ['errResponse', 'errDataEmpty']};
		}
		
		try {
			data = JSON.parse(text);
		} catch (e) {
			return {error : ['errResponse', 'errDataNotJSON']};
		}
		
		data = this.normalize(data);
		if (!this.validResponse('upload', data)) {
			return {error : (response.norError || ['errResponse'])};
		}
		data.removed = $.merge((data.removed || []), $.map(data.added||[], function(f) { return f.hash; }));
		return data;
		
	},
	
	iframeCnt : 0,
	
	uploads : {
		// xhr muiti uploading flag
		xhrUploading: false,
		
		// check file/dir exists
		checkExists: function(files, target, fm, isDir) {
			var dfrd = $.Deferred(),
				names, renames = [], hashes = {}, chkFiles = [],
				cancel = function() {
					var i = files.length;
					while (--i > -1) {
						files[i]._remove = true;
					}
				},
				resolve = function() {
					dfrd.resolve(renames, hashes);
				},
				check = function() {
					var existed = [], exists = [], i, c,
						confirm = function(ndx) {
							var last = ndx == exists.length-1,
								opts = {
									title  : fm.i18n('cmdupload'),
									text   : ['errExists', exists[ndx].name, 'confirmRepl'], 
									all    : !last,
									accept : {
										label    : 'btnYes',
										callback : function(all) {
											!last && !all
												? confirm(++ndx)
												: resolve();
										}
									},
									reject : {
										label    : 'btnNo',
										callback : function(all) {
											var i;
			
											if (all) {
												i = exists.length;
												while (ndx < i--) {
													files[exists[i].i]._remove = true;
												}
											} else {
												files[exists[ndx].i]._remove = true;
											}
			
											!last && !all
												? confirm(++ndx)
												: resolve();
										}
									},
									cancel : {
										label    : 'btnCancel',
										callback : function() {
											cancel();
											resolve();
										}
									},
									buttons : [
										{
											label : 'btnBackup',
											callback : function(all) {
												var i;
												if (all) {
													i = exists.length;
													while (ndx < i--) {
														renames.push(exists[i].name);
													}
												} else {
													renames.push(exists[ndx].name);
												}
												!last && !all
													? confirm(++ndx)
													: resolve();
											}
										}
									]
								};
							
							if (!isDir) {
								opts.buttons.push({
									label : 'btnRename' + (last? '' : 'All'),
									callback : function() {
										renames = null;
										resolve();
									}
								});
							}
							if (fm.iframeCnt > 0) {
								delete opts.reject;
							}
							fm.confirm(opts);
						};
					
					if (! fm.file(target).read) {
						// for dropbox type
						resolve();
						return;
					}
					
					names = $.map(files, function(file, i) { return file.name && (!fm.UA.iOS || file.name !== 'image.jpg')? {i: i, name: file.name} : null ;});
					
					fm.request({
						data : {cmd : 'ls', target : target, intersect : $.map(names, function(item) { return item.name;})},
						notify : {type : 'preupload', cnt : 1, hideCnt : true},
						preventFail : true
					})
					.done(function(data) {
						var existedArr, cwdItems;
						if (data) {
							if (data.error) {
								cancel();
							} else {
								if (fm.options.overwriteUploadConfirm && fm.option('uploadOverwrite', target)) {
									if (data.list) {
										if (Array.isArray(data.list)) {
											existed = data.list || [];
										} else {
											existedArr = [];
											existed = $.map(data.list, function(n) {
												if (typeof n === 'string') {
													return n;
												} else {
													// support to >=2.1.11 plugin Normalizer, Sanitizer
													existedArr = existedArr.concat(n);
													return null;
												}
											});
											if (existedArr.length) {
												existed = existed.concat(existedArr);
											}
											hashes = data.list;
										}
										exists = $.map(names, function(name){
											return $.inArray(name.name, existed) !== -1 ? name : null ;
										});
										if (existed.length && target == fm.cwd().hash) {
											cwdItems = $.map(fm.files(target), function(file) { return file.name; } );
											if ($.map(existed, function(n) { 
												return $.inArray(n, cwdItems) === -1? true : null;
											}).length){
												fm.sync();
											}
										}
									}
								}
							}
						}
						if (exists.length > 0) {
							confirm(0);
						} else {
							resolve();
						}
					})
					.fail(function(error) {
						cancel();
						resolve();
						error && fm.error(error);
					});
				};
			if (fm.api >= 2.1 && typeof files[0] == 'object') {
				check();
			} else {
				resolve();
			}
			return dfrd;
		},
		
		// check droped contents
		checkFile : function(data, fm, target) {
			if (!!data.checked || data.type == 'files') {
				return data.files;
			} else if (data.type == 'data') {
				var dfrd = $.Deferred(),
				files = [],
				paths = [],
				dirctorys = [],
				entries = [],
				processing = 0,
				items,
				mkdirs = [],
				
				readEntries = function(dirReader) {
					var toArray = function(list) {
						return Array.prototype.slice.call(list || []);
					};
				},
				
				doScan = function(items) {
					var dirReader, entry, length,
					entries = [],
					toArray = function(list) {
						return Array.prototype.slice.call(list || [], 0);
					},
					excludes = fm.options.folderUploadExclude[fm.OS] || null;
					length = items.length;
					for (var i = 0; i < length; i++) {
						entry = items[i];
						if (entry) {
							if (entry.isFile) {
								processing++;
								entry.file(function (file) {
									if (! excludes || ! file.name.match(excludes)) {
										paths.push(entry.fullPath || '');
										files.push(file);
									}
									processing--;
								});
							} else if (entry.isDirectory) {
								if (fm.api >= 2.1) {
									processing++;
									mkdirs.push(entry.fullPath);
									dirReader = entry.createReader();
									var entries = [];
									// Call the reader.readEntries() until no more results are returned.
									var readEntries = function() {
										 dirReader.readEntries (function(results) {
											if (!results.length) {
												for (var i = 0; i < entries.length; i++) {
													doScan([entries[i]]);
												}
												processing--;
											} else {
												entries = entries.concat(toArray(results));
												readEntries();
											}
										}, function(){
											processing--;
										});
									};
									readEntries(); // Start reading dirs.
								}
							}
						}
					}
				}, hasDirs;
				
				items = $.map(data.files.items, function(item){
					return item.getAsEntry? item.getAsEntry() : item.webkitGetAsEntry();
				});
				$.each(items, function(i, item) {
					if (item.isDirectory) {
						hasDirs = true;
						return false;
					}
				});
				if (items.length > 0) {
					fm.uploads.checkExists(items, target, fm, hasDirs).done(function(renames, hashes){
						var notifyto, dfds = [];
						if (fm.options.overwriteUploadConfirm && fm.option('uploadOverwrite', target)) {
							if (renames === null) {
								data.overwrite = 0;
								renames = [];
							}
							items = $.map(items, function(item){
								var i, bak, hash, dfd, hi;
								if (item.isDirectory && renames.length) {
									i = $.inArray(item.name, renames);
									if (i !== -1) {
										renames.splice(i, 1);
										bak = fm.uniqueName(item.name + fm.options.backupSuffix , null, '');
										$.each(hashes, function(h, name) {
											if (item.name == name) {
												hash = h;
												return false;
											}
										});
										if (! hash) {
											hash = fm.fileByName(item.name, target).hash;
										}
										fm.lockfiles({files : [hash]});
										dfd = fm.request({
											data   : {cmd : 'rename', target : hash, name : bak},
											notify : {type : 'rename', cnt : 1}
										})
										.fail(function(error) {
											item._remove = true;
											fm.sync();
										})
										.always(function() {
											fm.unlockfiles({files : [hash]})
										});
										dfds.push(dfd);
									}
								}
								return !item._remove? item : null;
							});
						}
						$.when.apply($, dfds).done(function(){
							if (items.length > 0) {
								notifyto = setTimeout(function() {
									fm.notify({type : 'readdir', cnt : 1, hideCnt: true});
								}, fm.options.notifyDelay);
								doScan(items);
								setTimeout(function wait() {
									if (processing > 0) {
										setTimeout(wait, 10);
									} else {
										notifyto && clearTimeout(notifyto);
										fm.notify({type : 'readdir', cnt : -1});
										dfrd.resolve([files, paths, renames, hashes, mkdirs]);
									}
								}, 10);
							} else {
								dfrd.reject();
							}
						});
					});
					return dfrd.promise();
				} else {
					return dfrd.reject();
				}
			} else {
				var ret = [];
				var check = [];
				var str = data.files[0];
				if (data.type == 'html') {
					var tmp = $("<html/>").append($.parseHTML(str.replace(/ src=/ig, ' _elfsrc='))),
						atag;
					$('img[_elfsrc]', tmp).each(function(){
						var url, purl,
						self = $(this),
						pa = self.closest('a');
						if (pa && pa.attr('href') && pa.attr('href').match(/\.(?:jpe?g|gif|bmp|png)/i)) {
							purl = pa.attr('href');
						}
						url = self.attr('_elfsrc');
						if (url) {
							if (purl) {
								$.inArray(purl, ret) == -1 && ret.push(purl);
								$.inArray(url, check) == -1 &&  check.push(url);
							} else {
								$.inArray(url, ret) == -1 && ret.push(url);
							}
						}
						// Probably it's clipboard data
						if (ret.length === 1 && ret[0].match(/^data:image\/png/)) {
							data.clipdata = true;
						}
					});
					atag = $('a[href]', tmp);
					atag.each(function(){
						var loc,
							parseUrl = function(url) {
							    var a = document.createElement('a');
							    a.href = url;
							    return a;
							};
						if ($(this).text()) {
							loc = parseUrl($(this).attr('href'));
							if (loc.href && (atag.length === 1 || ! loc.pathname.match(/(?:\.html?|\/[^\/.]*)$/i))) {
								if ($.inArray(loc.href, ret) == -1 && $.inArray(loc.href, check) == -1) ret.push(loc.href);
							}
						}
					});
				} else {
					var regex, m, url;
					regex = /(http[^<>"{}|\\^\[\]`\s]+)/ig;
					while (m = regex.exec(str)) {
						url = m[1].replace(/&amp;/g, '&');
						if ($.inArray(url, ret) == -1) ret.push(url);
					}
				}
				return ret;
			}
		},

		// upload transport using XMLHttpRequest
		xhr : function(data, fm) { 
			var self   = fm ? fm : this,
				node        = self.getUI(),
				xhr         = new XMLHttpRequest(),
				notifyto    = null, notifyto2 = null,
				dataChecked = data.checked,
				isDataType  = (data.isDataType || data.type == 'data'),
				target      = (data.target || self.cwd().hash),
				dropEvt     = (data.dropEvt || null),
				chunkEnable = (self.option('uploadMaxConn', target) != -1),
				multiMax    = Math.min(5, Math.max(1, self.option('uploadMaxConn', target))),
				retryWait   = 10000, // 10 sec
				retryMax    = 30, // 10 sec * 30 = 300 secs (Max 5 mins)
				retry       = 0,
				getFile     = function(files) {
					var dfd = $.Deferred(),
						file;
					if (files.promise) {
						files.always(function(f) {
							dfd.resolve(Array.isArray(f) && f.length? (isDataType? f[0][0] : f[0]) : {});
						});
					} else {
						dfd.resolve(files.length? (isDataType? files[0][0] : files[0]) : {});
					}
					return dfd;
				},
				dfrd   = $.Deferred()
					.fail(function(error) {
						if (self.uploads.xhrUploading) {
							getFile(files).done(function(file) {
								if (file._cid) {
									setTimeout(function() { self.sync(); }, 5000);
									formData = new FormData();
									files = [{_chunkfail: true}];
									formData.append('chunk', file._chunk);
									formData.append('cid'  , file._cid);
									isDataType = false;
									send(files);
								}
							});
						}
						self.sync();
						self.uploads.xhrUploading = false;
						files = null;
						error && self.error(error);
					})
					.done(function(data) {
						xhr = null;
						self.uploads.xhrUploading = false;
						files = null;
						if (data) {
							self.currentReqCmd = 'upload';
							data.warning && self.error(data.warning);
							self.updateCache(data);
							data.removed && self.remove(data);
							data.added   && self.add(data);
							data.changed && self.change(data);
		 					self.trigger('upload', data);
		 					self.trigger('uploaddone');
							data.sync && self.sync();
							data.debug && fm.debug('backend-debug', data);
						}
					})
					.always(function() {
						// unregist fnAbort function
						node.off('uploadabort', fnAbort);
						$(window).off('unload', fnAbort);
						notifyto && clearTimeout(notifyto);
						notifyto2 && clearTimeout(notifyto2);
						dataChecked && !data.multiupload && checkNotify() && self.notify({type : 'upload', cnt : -cnt, progress : 0, size : 0});
						chunkMerge && notifyElm.children('.elfinder-notify-chunkmerge').length && self.notify({type : 'chunkmerge', cnt : -1});
					}),
				formData    = new FormData(),
				files       = data.input ? data.input.files : self.uploads.checkFile(data, self, target), 
				cnt         = data.checked? (isDataType? files[0].length : files.length) : files.length,
				loaded      = 0,
				prev        = 0,
				filesize    = 0,
				notify      = false,
				notifyElm   = self.ui.notify,
				cancelBtn   = true,
				abort       = false,
				checkNotify = function() {
					return notify = (notify || notifyElm.children('.elfinder-notify-upload').length);
				},
				fnAbort     = function() {
					abort = true;
					if (xhr) {
						xhr.quiet = true;
						xhr.abort();
					}
					if (checkNotify()) {
						self.notify({type : 'upload', cnt : notifyElm.children('.elfinder-notify-upload').data('cnt') * -1, progress : 0, size : 0});
					}
				},
				cancelToggle = function(show) {
					notifyElm.children('.elfinder-notify-upload').children('.elfinder-notify-cancel')[show? 'show':'hide']();
				},
				startNotify = function(size) {
					if (!size) size = filesize;
					return setTimeout(function() {
						notify = true;
						self.notify({type : 'upload', cnt : cnt, progress : loaded - prev, size : size,
							cancel: function() {
								node.trigger('uploadabort');
								dfrd.resolve();
							}
						});
						prev = loaded;
						if (data.multiupload) {
							cancelBtn && cancelToggle(true);
						} else {
							cancelToggle(cancelBtn && loaded < size);
						}
					}, self.options.notifyDelay);
				},
				doRetry = function() {
					if (retry++ <= retryMax) {
						if (checkNotify() && prev) {
							self.notify({type : 'upload', cnt : 0, progress : 0, size : prev});
						}
						xhr.quiet = true;
						xhr.abort();
						prev = loaded = 0;
						setTimeout(function() {
							if (! abort) {
								xhr.open('POST', self.uploadURL, true);
								xhr.send(formData);
							}
						}, retryWait);
					} else {
						node.trigger('uploadabort');
						dfrd.reject(['errAbort', 'errTimeout']);
					}
				},
				renames = (data.renames || null),
				hashes = (data.hashes || null),
				chunkMerge = false;
			
			// regist fnAbort function
			node.one('uploadabort', fnAbort);
			$(window).one('unload.' + fm.namespace, fnAbort);
			
			!chunkMerge && (prev = loaded);
			
			if (!isDataType && !cnt) {
				return dfrd.reject(['errUploadNoFiles']);
			}
			
			xhr.addEventListener('error', function() {
				if (xhr.status == 0) {
					if (abort) {
						dfrd.reject();
					} else {
						// ff bug while send zero sized file
						// for safari - send directory
						if (!isDataType && data.files && $.map(data.files, function(f){return ! f.type && f.size === (self.UA.Safari? 1802 : 0)? f : null;}).length) {
							errors.push('errFolderUpload');
							dfrd.reject(['errAbort', 'errFolderUpload']);
						} else if (data.input && $.map(data.input.files, function(f){return ! f.type && f.size === (self.UA.Safari? 1802 : 0)? f : null;}).length) {
							dfrd.reject(['errUploadNoFiles']);
						} else {
							doRetry();
						}
					}
				} else {
					node.trigger('uploadabort');
					dfrd.reject('errConnect');
				}
			}, false);
			
			xhr.addEventListener('load', function(e) {
				var status = xhr.status, res, curr = 0, error = '';
				
				if (status >= 400) {
					if (status > 500) {
						error = 'errResponse';
					} else {
						error = ['errResponse', 'errServerError'];
					}
				} else {
					if (!xhr.responseText) {
						error = ['errResponse', 'errDataEmpty'];
					}
				}
				
				if (error) {
					node.trigger('uploadabort');
					getFile(files).done(function(file) {
						return dfrd.reject(file._cid? null : error);
					});
				}
				
				loaded = filesize;
				
				if (checkNotify() && (curr = loaded - prev)) {
					self.notify({type : 'upload', cnt : 0, progress : curr, size : 0});
				}

				res = self.parseUploadData(xhr.responseText);
				
				// chunked upload commit
				if (res._chunkmerged) {
					formData = new FormData();
					var _file = [{_chunkmerged: res._chunkmerged, _name: res._name, _mtime: res._mtime}];
					chunkMerge = true;
					node.off('uploadabort', fnAbort);
					notifyto2 = setTimeout(function() {
						self.notify({type : 'chunkmerge', cnt : 1});
					}, self.options.notifyDelay);
					isDataType? send(_file, files[1]) : send(_file);
					return;
				}
				
				res._multiupload = data.multiupload? true : false;
				if (res.error) {
					self.trigger('uploadfail', res);
					if (res._chunkfailure || res._multiupload) {
						abort = true;
						self.uploads.xhrUploading = false;
						notifyto && clearTimeout(notifyto);
						if (notifyElm.children('.elfinder-notify-upload').length) {
							self.notify({type : 'upload', cnt : -cnt, progress : 0, size : 0});
							dfrd.reject(res.error);
						} else {
							// for multi connection
							dfrd.reject();
						}
					} else {
						dfrd.reject(res.error);
					}
				} else {
					dfrd.resolve(res);
				}
			}, false);
			
			xhr.upload.addEventListener('loadstart', function(e) {
				if (!chunkMerge && e.lengthComputable) {
					loaded = e.loaded;
					retry && (loaded = 0);
					filesize = e.total;
					if (!loaded) {
						loaded = parseInt(filesize * 0.05);
					}
					if (checkNotify()) {
						self.notify({type : 'upload', cnt : 0, progress : loaded - prev, size : data.multiupload? 0 : filesize});
						prev = loaded;
					}
				}
			}, false);
			
			xhr.upload.addEventListener('progress', function(e) {
				var curr;

				if (e.lengthComputable && !chunkMerge && xhr.readyState < 2) {
					
					loaded = e.loaded;

					// to avoid strange bug in safari (not in chrome) with drag&drop.
					// bug: macos finder opened in any folder,
					// reset safari cache (option+command+e), reload elfinder page,
					// drop file from finder
					// on first attempt request starts (progress callback called ones) but never ends.
					// any next drop - successfull.
					if (!data.checked && loaded > 0 && !notifyto) {
						notifyto = startNotify(xhr._totalSize - loaded);
					}
					
					if (!filesize) {
						filesize = e.total;
						if (!loaded) {
							loaded = parseInt(filesize * 0.05);
						}
					}
					
					curr = loaded - prev;
					if (checkNotify() && (curr/e.total) >= 0.05) {
						self.notify({type : 'upload', cnt : 0, progress : curr, size : 0});
						prev = loaded;
					}
					
					if (! data.multiupload && loaded >= filesize) {
						cancelBtn = false;
						cancelToggle(false);
					}
				}
			}, false);
			
			var send = function(files, paths){
				var size = 0,
				fcnt = 1,
				sfiles = [],
				c = 0,
				total = cnt,
				maxFileSize,
				totalSize = 0,
				chunked = [],
				chunkID = new Date().getTime().toString().substr(-9), // for take care of the 32bit backend system
				BYTES_PER_CHUNK = Math.min((fm.uplMaxSize? fm.uplMaxSize : 2097152) - 8190, fm.options.uploadMaxChunkSize), // uplMaxSize margin 8kb or options.uploadMaxChunkSize
				blobSlice = chunkEnable? false : '',
				blobSize, blobMtime, i, start, end, chunks, blob, chunk, added, done, last, failChunk,
				multi = function(files, num){
					var sfiles = [], cid, sfilesLen = 0, cancelChk;
					if (!abort) {
						while(files.length && sfiles.length < num) {
							sfiles.push(files.shift());
						}
						sfilesLen = sfiles.length;
						if (sfilesLen) {
							cancelChk = sfilesLen;
							for (var i=0; i < sfilesLen; i++) {
								if (abort) {
									break;
								}
								cid = isDataType? (sfiles[i][0][0]._cid || null) : (sfiles[i][0]._cid || null);
								if (!!failChunk[cid]) {
									last--;
									continue;
								}
								fm.exec('upload', {
									type: data.type,
									isDataType: isDataType,
									files: sfiles[i],
									checked: true,
									target: target,
									dropEvt: dropEvt,
									renames: renames,
									hashes: hashes,
									multiupload: true,
									overwrite: data.overwrite === 0? 0 : void 0
								}, void 0, target)
								.fail(function(error) {
									if (error && error === 'No such command') {
										abort = true;
										fm.error(['errUpload', 'errPerm']);
									}
									if (cid) {	
										failChunk[cid] = true;
									}
								})
								.always(function(e) {
									if (e && e.added) added = $.merge(added, e.added);
									if (last <= ++done) {
										fm.trigger('multiupload', {added: added});
										notifyto && clearTimeout(notifyto);
										if (checkNotify()) {
											self.notify({type : 'upload', cnt : -cnt, progress : 0, size : 0});
										}
									}
									if (files.length) {
										multi(files, 1); // Next one
									} else {
										if (--cancelChk <= 1) {
											cancelBtn = false;
											cancelToggle(false);
										}
									}
								});
							}
						}
					}
					if (sfiles.length < 1 || abort) {
						if (abort) {
							notifyto && clearTimeout(notifyto);
							if (cid) {
								failChunk[cid] = true;
							}
							dfrd.reject();
						} else {
							dfrd.resolve();
							self.uploads.xhrUploading = false;
						}
					}
				},
				check = function(){
					if (!self.uploads.xhrUploading) {
						self.uploads.xhrUploading = true;
						multi(sfiles, multiMax); // Max connection: 3
					} else {
						setTimeout(function(){ check(); }, 100);
					}
				};

				if (! dataChecked && (isDataType || data.type == 'files')) {
					if (! (maxFileSize = fm.option('uploadMaxSize', target))) {
						maxFileSize = 0;
					}
					for (i=0; i < files.length; i++) {
						try {
							blob = files[i];
							blobSize = blob.size;
							if (blobSlice === false) {
								blobSlice = '';
								if (self.api >= 2.1) {
									if ('slice' in blob) {
										blobSlice = 'slice';
									} else if ('mozSlice' in blob) {
										blobSlice = 'mozSlice';
									} else if ('webkitSlice' in blob) {
										blobSlice = 'webkitSlice';
									}
								}
							}
						} catch(e) {
							cnt--;
							total--;
							continue;
						}
						
						// file size check
						if ((maxFileSize && blobSize > maxFileSize) || (!blobSlice && fm.uplMaxSize && blobSize > fm.uplMaxSize)) {
							self.error(self.i18n('errUploadFile', blob.name) + ' ' + self.i18n('errUploadFileSize'));
							cnt--;
							total--;
							continue;
						}
						
						// file mime check
						if (blob.type && ! self.uploadMimeCheck(blob.type, target)) {
							self.error(self.i18n('errUploadFile', blob.name) + ' ' + self.i18n('errUploadMime') + ' (' + self.escape(blob.type) + ')');
							cnt--;
							total--;
							continue;
						}
						
						if (blobSlice && blobSize > BYTES_PER_CHUNK) {
							start = 0;
							end = BYTES_PER_CHUNK;
							chunks = -1;
							total = Math.floor(blobSize / BYTES_PER_CHUNK);
							blobMtime = blob.lastModified? Math.round(blob.lastModified/1000) : 0;

							totalSize += blobSize;
							chunked[chunkID] = 0;
							while(start <= blobSize) {
								chunk = blob[blobSlice](start, end);
								chunk._chunk = blob.name + '.' + (++chunks) + '_' + total + '.part';
								chunk._cid   = chunkID;
								chunk._range = start + ',' + chunk.size + ',' + blobSize;
								chunk._mtime = blobMtime;
								chunked[chunkID]++;
								
								if (size) {
									c++;
								}
								if (typeof sfiles[c] == 'undefined') {
									sfiles[c] = [];
									if (isDataType) {
										sfiles[c][0] = [];
										sfiles[c][1] = [];
									}
								}
								size = BYTES_PER_CHUNK;
								fcnt = 1;
								if (isDataType) {
									sfiles[c][0].push(chunk);
									sfiles[c][1].push(paths[i]);
								} else {
									sfiles[c].push(chunk);
								}

								start = end;
								end = start + BYTES_PER_CHUNK;
							}
							if (chunk == null) {
								self.error(self.i18n('errUploadFile', blob.name) + ' ' + self.i18n('errUploadFileSize'));
								cnt--;
								total--;
							} else {
								total += chunks;
								size = 0;
								fcnt = 1;
								c++;
							}
							continue;
						}
						if ((fm.uplMaxSize && size + blobSize >= fm.uplMaxSize) || fcnt > fm.uplMaxFile) {
							size = 0;
							fcnt = 1;
							c++;
						}
						if (typeof sfiles[c] == 'undefined') {
							sfiles[c] = [];
							if (isDataType) {
								sfiles[c][0] = [];
								sfiles[c][1] = [];
							}
						}
						if (isDataType) {
							sfiles[c][0].push(blob);
							sfiles[c][1].push(paths[i]);
						} else {
							sfiles[c].push(blob);
						}
						size += blobSize;
						totalSize += blobSize;
						fcnt++;
					}
					
					if (sfiles.length == 0) {
						// no data
						data.checked = true;
						return false;
					}
					
					if (sfiles.length > 1) {
						// multi upload
						notifyto = startNotify(totalSize);
						added = [];
						done = 0;
						last = sfiles.length;
						failChunk = [];
						check();
						return true;
					}
					
					// single upload
					if (isDataType) {
						files = sfiles[0][0];
						paths = sfiles[0][1];
					} else {
						files = sfiles[0];
					}
				}
				
				if (!dataChecked) {
					if (!fm.UA.Safari || !data.files) {
						notifyto = startNotify(totalSize);
					} else {
						xhr._totalSize = totalSize;
					}
				}
				
				dataChecked = true;
				
				if (! files.length) {
					dfrd.reject(['errUploadNoFiles']);
				}
				
				xhr.open('POST', self.uploadURL, true);
				
				// set request headers
				if (fm.customHeaders) {
					$.each(fm.customHeaders, function(key) {
						xhr.setRequestHeader(key, this);
					});
				}
				
				// set xhrFields
				if (fm.xhrFields) {
					$.each(fm.xhrFields, function(key) {
						if (key in xhr) {
							xhr[key] = this;
						}
					});
				}

				formData.append('cmd', 'upload');
				formData.append(self.newAPI ? 'target' : 'current', target);
				if (renames && renames.length) {
					$.each(renames, function(i, v) {
						formData.append('renames[]', v);
					});
					formData.append('suffix', fm.options.backupSuffix);
				}
				if (hashes) {
					$.each(hashes, function(i, v) {
						formData.append('hashes['+ i +']', v);
					});
				}
				$.each(self.options.customData, function(key, val) {
					formData.append(key, val);
				});
				$.each(self.options.onlyMimes, function(i, mime) {
					formData.append('mimes['+i+']', mime);
				});
				
				$.each(files, function(i, file) {
					if (file._chunkmerged) {
						formData.append('chunk', file._chunkmerged);
						formData.append('upload[]', file._name);
						formData.append('mtime[]', file._mtime);
					} else {
						if (file._chunkfail) {
							formData.append('upload[]', 'chunkfail');
							formData.append('mimes', 'chunkfail');
						} else {
							formData.append('upload[]', file);
							if (data.clipdata) {
								data.overwrite = 0;
								formData.append('name[]', fm.date(fm.nonameDateFormat) + '.png');
							}
							if (fm.UA.iOS && file.name === 'image.jpg') {
								data.overwrite = 0;
								formData.append('name[]', fm.date(fm.nonameDateFormat) + '.jpg');
							}
						}
						if (file._chunk) {
							formData.append('chunk', file._chunk);
							formData.append('cid'  , file._cid);
							formData.append('range', file._range);
							formData.append('mtime[]', file._mtime);
						} else {
							formData.append('mtime[]', file.lastModified? Math.round(file.lastModified/1000) : 0);
						}
					}
				});
				
				if (isDataType) {
					$.each(paths, function(i, path) {
						formData.append('upload_path[]', path);
					});
				}
				
				if (data.overwrite === 0) {
					formData.append('overwrite', 0);
				}
				
				// send int value that which meta key was pressed when dropped  as `dropWith`
				if (dropEvt) {
					formData.append('dropWith', parseInt(
						(dropEvt.altKey  ? '1' : '0')+
						(dropEvt.ctrlKey ? '1' : '0')+
						(dropEvt.metaKey ? '1' : '0')+
						(dropEvt.shiftKey? '1' : '0'), 2));
				}
				
				xhr.send(formData);
				
				return true;
			};
			
			if (! isDataType) {
				if (files.length > 0) {
					if (! data.clipdata && renames == null) {
						var mkdirs = [],
							paths = [],
							excludes = fm.options.folderUploadExclude[fm.OS] || null;
						$.each(files, function(i, file) {
							var relPath = file.webkitRelativePath || file.relativePath || '';
							if (! relPath) {
								return false;
							}
							if (excludes && file.name.match(excludes)) {
								file._remove = true;
								relPath = void(0);
							} else {
								relPath = relPath.replace(/\/[^\/]*$/, '');
								if (relPath && $.inArray(relPath, mkdirs) === -1) {
									mkdirs.push(relPath);
								}
							}
							paths.push(relPath);
						});
						renames = [];
						hashes = {};
						if (mkdirs.length) {
							(function() {
								var checkDirs = $.map(mkdirs, function(name) { return name.indexOf('/') === -1 ? {name: name} : null;}),
									cancelDirs = [];
								fm.uploads.checkExists(checkDirs, target, fm, true).done(
									function(res, res2) {
										var dfds = [], dfd, bak, hash;
										if (fm.options.overwriteUploadConfirm && fm.option('uploadOverwrite', target)) {
											cancelDirs = $.map(checkDirs, function(dir) { return dir._remove? dir.name : null ;} );
											checkDirs = $.map(checkDirs, function(dir) { return !dir._remove? dir : null ;} );
										}
										if (cancelDirs.length) {
											$.each(paths.concat(), function(i, path) {
												if ($.inArray(path, cancelDirs) === 0) {
													files[i]._remove = true;
													delete paths[i];
												}
											});
										}
										files = $.map(files, function(file) { return file._remove? null : file; });
										paths = $.map(paths, function(path) { return path === void 0 ? null : path; });
										if (checkDirs.length) {
											dfd = $.Deferred();
											if (res.length) {
												$.each(res, function(i, existName) {
													// backup
													bak = fm.uniqueName(existName + fm.options.backupSuffix , null, '');
													$.each(res2, function(h, name) {
														if (res[0] == name) {
															hash = h;
															return false;
														}
													});
													if (! hash) {
														hash = fm.fileByName(res[0], target).hash;
													}
													fm.lockfiles({files : [hash]});
													dfds.push(
														fm.request({
															data   : {cmd : 'rename', target : hash, name : bak},
															notify : {type : 'rename', cnt : 1}
														})
														.fail(function(error) {
															dfrd.reject(error);
															fm.sync();
														})
														.always(function() {
															fm.unlockfiles({files : [hash]})
														})
													);
												});
											} else {
												dfds.push(null);
											}
											
											$.when.apply($, dfds).done(function() {
												// ensure directories
												fm.request({
													data   : {cmd : 'mkdir', target : target, dirs : mkdirs},
													notify : {type : 'mkdir', cnt : mkdirs.length},
													preventFail: true
												})
												.fail(function(error) {
													error = error || ['errUnknown'];
													if (error[0] === 'errCmdParams') {
														multiMax = 1;
													} else {
														multiMax = 0;
														dfrd.reject(error);
													}
												})
												.done(function(data) {
													if (data.hashes) {
														paths = $.map(paths.concat(), function(p) {
															if (p === '') {
																return target;
															} else {
																return data.hashes['/' + p];
															}
														});
													}
												})
												.always(function(data) {
													if (multiMax) {
														isDataType = true;
														if (! send(files, paths)) {
															dfrd.reject();
														}
													}
												});
											});
										} else {
											dfrd.reject();
										}
									}
								);
							})();
						} else {
							fm.uploads.checkExists(files, target, fm).done(
								function(res, res2){
									if (fm.options.overwriteUploadConfirm && fm.option('uploadOverwrite', target)) {
										if (res === null) {
											data.overwrite = 0;
										} else {
											renames = res;
											hashes = res2;
										}
										files = $.map(files, function(file){return !file._remove? file : null ;});
									}
									cnt = files.length;
									if (cnt > 0) {
										if (! send(files)) {
											dfrd.reject();
										}
									} else {
										dfrd.reject();
									}
								}
							);
						}
					} else {
						if (! send(files)) {
							dfrd.reject();
						}
					}
				} else {
					dfrd.reject();
				}
			} else {
				if (dataChecked) {
					send(files[0], files[1]);
				} else {
					files.done(function(result) { // result: [files, paths, renames, hashes, mkdirs]
						renames = [];
						cnt = result[0].length;
						if (cnt) {
							if (result[4] && result[4].length) {
								// ensure directories
								fm.request({
									data   : {cmd : 'mkdir', target : target, dirs : result[4]},
									notify : {type : 'mkdir', cnt : result[4].length},
									preventFail: true
								})
								.fail(function(error) {
									error = error || ['errUnknown'];
									if (error[0] === 'errCmdParams') {
										multiMax = 1;
									} else {
										multiMax = 0;
										dfrd.reject(error);
									}
								})
								.done(function(data) {
									if (data.hashes) {
										result[1] = $.map(result[1], function(p) {
											p = p.replace(/\/[^\/]*$/, '');
											if (p === '') {
												return target;
											} else {
												return data.hashes[p];
											}
										});
									}
								})
								.always(function(data) {
									if (multiMax) {
										renames = result[2];
										hashes = result[3];
										send(result[0], result[1]);
									}
								});
								return;
							} else {
								result[1] = $.map(result[1], function() { return target; });
							}
							renames = result[2];
							hashes = result[3];
							send(result[0], result[1]);
						} else {
							dfrd.reject(['errUploadNoFiles']);
						}
					}).fail(function(){
						dfrd.reject();
					});
				}
			}

			return dfrd;
		},
		
		// upload transport using iframe
		iframe : function(data, fm) { 
			var self   = fm ? fm : this,
				input  = data.input? data.input : false,
				files  = !input ? self.uploads.checkFile(data, self) : false,
				dfrd   = $.Deferred()
					.fail(function(error) {
						error && self.error(error);
					}),
				name = 'iframe-'+fm.namespace+(++self.iframeCnt),
				form = $('<form action="'+self.uploadURL+'" method="post" enctype="multipart/form-data" encoding="multipart/form-data" target="'+name+'" style="display:none"><input type="hidden" name="cmd" value="upload" /></form>'),
				msie = this.UA.IE,
				// clear timeouts, close notification dialog, remove form/iframe
				onload = function() {
					abortto  && clearTimeout(abortto);
					notifyto && clearTimeout(notifyto);
					notify   && self.notify({type : 'upload', cnt : -cnt});
					
					setTimeout(function() {
						msie && $('<iframe src="javascript:false;"/>').appendTo(form);
						form.remove();
						iframe.remove();
					}, 100);
				},
				iframe = $('<iframe src="'+(msie ? 'javascript:false;' : 'about:blank')+'" name="'+name+'" style="position:absolute;left:-1000px;top:-1000px" />')
					.on('load', function() {
						iframe.off('load')
							.on('load', function() {
								onload();
								// data will be processed in callback response or window onmessage
								dfrd.resolve();
							});
							
							// notify dialog
							notifyto = setTimeout(function() {
								notify = true;
								self.notify({type : 'upload', cnt : cnt});
							}, self.options.notifyDelay);
							
							// emulate abort on timeout
							if (self.options.iframeTimeout > 0) {
								abortto = setTimeout(function() {
									onload();
									dfrd.reject([errors.connect, errors.timeout]);
								}, self.options.iframeTimeout);
							}
							
							form.submit();
					}),
				target  = (data.target || self.cwd().hash),
				names   = [],
				dfds    = [],
				renames = [],
				hashes  = {},
				cnt, notify, notifyto, abortto;

			if (files && files.length) {
				$.each(files, function(i, val) {
					form.append('<input type="hidden" name="upload[]" value="'+val+'"/>');
				});
				cnt = 1;
			} else if (input && $(input).is(':file') && $(input).val()) {
				if (fm.options.overwriteUploadConfirm && fm.option('uploadOverwrite', target)) {
					names = input.files? input.files : [{ name: $(input).val().replace(/^(?:.+[\\\/])?([^\\\/]+)$/, '$1') }];
					//names = $.map(names, function(file){return file.name? { name: file.name } : null ;});
					dfds.push(self.uploads.checkExists(names, target, self).done(
						function(res, res2){
							if (res === null) {
								data.overwrite = 0;
							} else{
								renames = res;
								hashes = res2;
								cnt = $.map(names, function(file){return !file._remove? file : null ;}).length;
								if (cnt != names.length) {
									cnt = 0;
								}
							}
						}
					));
				}
				cnt = input.files ? input.files.length : 1;
				form.append(input);
			} else {
				return dfrd.reject();
			}
			
			$.when.apply($, dfds).done(function() {
				if (cnt < 1) {
					return dfrd.reject();
				}
				form.append('<input type="hidden" name="'+(self.newAPI ? 'target' : 'current')+'" value="'+target+'"/>')
					.append('<input type="hidden" name="html" value="1"/>')
					.append('<input type="hidden" name="node" value="'+self.id+'"/>')
					.append($(input).attr('name', 'upload[]'));
				
				if (renames.length > 0) {
					$.each(renames, function(i, rename) {
						form.append('<input type="hidden" name="renames[]" value="'+self.escape(rename)+'"/>');
					});
					form.append('<input type="hidden" name="suffix" value="'+fm.options.backupSuffix+'"/>');
				}
				if (hashes) {
					$.each(renames, function(i, v) {
						form.append('<input type="hidden" name="['+i+']" value="'+self.escape(v)+'"/>');
					});
				}
				
				if (data.overwrite === 0) {
					form.append('<input type="hidden" name="overwrite" value="0"/>');
				}
				
				$.each(self.options.onlyMimes||[], function(i, mime) {
					form.append('<input type="hidden" name="mimes[]" value="'+self.escape(mime)+'"/>');
				});
				
				$.each(self.options.customData, function(key, val) {
					form.append('<input type="hidden" name="'+key+'" value="'+self.escape(val)+'"/>');
				});
				
				form.appendTo('body');
				iframe.appendTo('body');
			});
			
			return dfrd;
		}
	},
	
	
	/**
	 * Bind callback to event(s) The callback is executed at most once per event.
	 * To bind to multiply events at once, separate events names by space
	 *
	 * @param  String    event name
	 * @param  Function  callback
	 * @return elFinder
	 */
	one : function(event, callback) {
		var self  = this,
			event = event.toLowerCase(),
			h     = function(e, f) {
				if (!self.toUnbindEvents[event]) {
					self.toUnbindEvents[event] = [];
				}
				self.toUnbindEvents[event].push({
					type: event,
					callback: h
				});
				return callback.apply(this, arguments);
			};
		return this.bind(event, h);
	},
	
	/**
	 * Set/get data into/from localStorage
	 *
	 * @param  String       key
	 * @param  String|void  value
	 * @return String
	 */
	localStorage : function(key, val) {
		var self   = this,
			s      = window.localStorage,
			oldkey = 'elfinder-'+(key || '')+this.id, // old key of elFinder < 2.1.6
			prefix = window.location.pathname+'-elfinder-',
			suffix = this.id,
			clrs   = [],
			retval, oldval, t, precnt, sufcnt;

		// reset this node data
		if (typeof(key) === 'undefined') {
			precnt = prefix.length;
			sufcnt = suffix.length * -1;
			$.each(s, function(key) {
				if (key.substr(0, precnt) === prefix && key.substr(sufcnt) === suffix) {
					clrs.push(key);
				}
			});
			$.each(clrs, function(i, key) {
				s.removeItem(key);
			});
			return true;
		}
		
		// new key of elFinder >= 2.1.6
		key = prefix+key+suffix;
		
		if (val === null) {
			return s.removeItem(key);
		}
		
		if (val === void(0) && !(retval = s.getItem(key)) && (oldval = s.getItem(oldkey))) {
			val = oldval;
			s.removeItem(oldkey);
		}
		
		if (val !== void(0)) {
			t = typeof val;
			if (t !== 'string' && t !== 'number') {
				val = JSON.stringify(val);
			}
			try {
				s.setItem(key, val);
			} catch (e) {
				try {
					s.clear();
					s.setItem(key, val);
				} catch (e) {
					self.debug('error', e.toString());
				}
			}
			retval = s.getItem(key);
		}

		if (retval && (retval.substr(0,1) === '{' || retval.substr(0,1) === '[')) {
			try {
				return JSON.parse(retval);
			} catch(e) {}
		}
		return retval;
	},
	
	/**
	 * Get/set cookie
	 *
	 * @param  String       cookie name
	 * @param  String|void  cookie value
	 * @return String
	 */
	cookie : function(name, value) {
		var d, o, c, i, retval, t;

		name = 'elfinder-'+name+this.id;

		if (value === void(0)) {
			if (document.cookie && document.cookie != '') {
				c = document.cookie.split(';');
				name += '=';
				for (i=0; i<c.length; i++) {
					c[i] = $.trim(c[i]);
					if (c[i].substring(0, name.length) == name) {
						retval = decodeURIComponent(c[i].substring(name.length));
						if (retval.substr(0,1) === '{' || retval.substr(0,1) === '[') {
							try {
								return JSON.parse(retval);
							} catch(e) {}
						}
						return retval;
					}
				}
			}
			return '';
		}

		o = Object.assign({}, this.options.cookie);
		if (value === null) {
			value = '';
			o.expires = -1;
		} else {
			t = typeof value;
			if (t !== 'string' && t !== 'number') {
				value = JSON.stringify(value);
			}
		}
		if (typeof(o.expires) == 'number') {
			d = new Date();
			d.setTime(d.getTime()+(o.expires * 86400000));
			o.expires = d;
		}
		document.cookie = name+'='+encodeURIComponent(value)+'; expires='+o.expires.toUTCString()+(o.path ? '; path='+o.path : '')+(o.domain ? '; domain='+o.domain : '')+(o.secure ? '; secure' : '');
		return value;
	},
	
	/**
	 * Get start directory (by location.hash or last opened directory)
	 * 
	 * @return String
	 */
	startDir : function() {
		var locHash = window.location.hash;
		if (locHash && locHash.match(/^#elf_/)) {
			return locHash.replace(/^#elf_/, '');
		} else if (this.options.startPathHash) {
			return this.options.startPathHash;
		} else {
			return this.lastDir();
		}
	},
	
	/**
	 * Get/set last opened directory
	 * 
	 * @param  String|undefined  dir hash
	 * @return String
	 */
	lastDir : function(hash) { 
		return this.options.rememberLastDir ? this.storage('lastdir', hash) : '';
	},
	
	/**
	 * Node for escape html entities in texts
	 * 
	 * @type jQuery
	 */
	_node : $('<span/>'),
	
	/**
	 * Replace not html-safe symbols to html entities
	 * 
	 * @param  String  text to escape
	 * @return String
	 */
	escape : function(name) {
		return this._node.text(name).html().replace(/"/g, '&quot;').replace(/'/g, '&#039;');
	},
	
	/**
	 * Cleanup ajax data.
	 * For old api convert data into new api format
	 * 
	 * @param  String  command name
	 * @param  Object  data from backend
	 * @return Object
	 */
	normalize : function(data) {
		var self   = this,
			chkCmdMap = function(opts) {
				// Disable command to replace with other command
				var disabled;
				if (opts.uiCmdMap) {
					if ($.isPlainObject(opts.uiCmdMap) && Object.keys(opts.uiCmdMap).length) {
						disabled = opts.disabled;
						$.each(opts.uiCmdMap, function(f, t) {
							if (t === 'hidden' && $.inArray(f, disabled) === -1) {
								disabled.push(f);
							}
						});
					} else {
						delete opts.uiCmdMap;
					}
				}
			},
			normalizeOptions = function(opts) {
				var getType = function(v) {
					var type = typeof v;
					if (type === 'object' && Array.isArray(v)) {
						type = 'array';
					}
					return type;
				};
				$.each(self.optionProperties, function(k, empty) {
					if (empty !== void(0)) {
						if (opts[k] && getType(opts[k]) !== getType(empty)) {
							opts[k] = empty;
						}
					}
				});
				return opts;
			},
			filter = function(file) { 
				var vid, targetOptions, isRoot;
				
				if (file && file.hash && file.name && file.mime) {
					if (file.mime == 'application/x-empty') {
						file.mime = 'text/plain';
					}

					if (file.options) {
						self.optionsByHashes[file.hash] = normalizeOptions(file.options);
					}
					
					isRoot = self.isRoot(file);
					if (isRoot && ! file.volumeid) {
						self.debug('warning', 'The volume root statuses requires `volumeid` property.');
					}
					if (isRoot || file.mime === 'directory') {
						// Prevention of circular reference
						if (file.phash) {
							if (file.phash === file.hash) {
								error = error.concat(['Parent folder of "$1" is itself.', file.name]);
								return null;
							}
							if (isRoot && file.volumeid && file.phash.indexOf(file.volumeid) === 0) {
								error = error.concat(['Parent folder of "$1" is inner itself.', file.name]);
								return null;
							}
						}
						
						// set options, tmbUrls for each volume
						if (file.volumeid) {
							vid = file.volumeid;
							
							if (isRoot) {
								if (! self.volOptions[vid]) {
									self.volOptions[vid] = {
										// set dispInlineRegex
										dispInlineRegex: self.options.dispInlineRegex
									};
								}
								
								targetOptions = self.volOptions[vid];
								
								if (file.options) {
									// >= v.2.1.14 has file.options
									Object.assign(targetOptions, file.options);
								}
								
								// for compat <= v2.1.13
								if (file.disabled) {
									targetOptions.disabled = file.disabled;
								}
								if (file.tmbUrl) {
									targetOptions.tmbUrl = file.tmbUrl;
								}
								
								// check uiCmdMap
								chkCmdMap(targetOptions);
								
								// check trash bin hash
								if (targetOptions.trashHash) {
									if (self.trashes[targetOptions.trashHash] === false) {
										delete targetOptions.trashHash;
									} else {
										self.trashes[targetOptions.trashHash] = file.hash;
									}
								}
								
								// set immediate properties
								$.each(self.optionProperties, function(k) {
									if (targetOptions[k]) {
										file[k] = targetOptions[k];
									}
								});
								self.roots[vid] = file.hash;
							}
							
							if (prevId !== vid) {
								prevId = vid;
								i18nFolderName = self.option('i18nFolderName', vid);
							}
						}
						
						// volume root i18n name
						if (isRoot && ! file.i18) {
							name = 'volume_' + file.name,
							i18 = self.i18n(false, name);
	
							if (name !== i18) {
								file.i18 = i18;
							}
						}
						
						// i18nFolderName
						if (i18nFolderName && ! file.i18) {
							name = 'folder_' + file.name,
							i18 = self.i18n(false, name);
	
							if (name !== i18) {
								file.i18 = i18;
							}
						}
						
						if (self.leafRoots[file.hash]) {
							// has leaf root to `dirs: 1`
							if (! file.dirs) {
								file.dirs = 1;
							}
							// set ts
							$.each(self.leafRoots[file.hash], function() {
								var f = self.file(this);
								if (f && f.ts && (file.ts || 0) < f.ts) {
									file.ts = f.ts;
								}
							});
						}
						
						// lock trash bins holder
						if (self.trashes[file.hash]) {
							file.locked = true;
						}
					}
					delete file.options;
					
					return file;
				}
				return null;
			},
			getDescendants = function(hashes) {
				var res = [];
				$.each(self.files(), function(h, f) {
					$.each(self.parents(h), function(i, ph) {
						if ($.inArray(ph, hashes) !== -1 && $.inArray(h, hashes) === -1) {
							res.push(h);
							return false;
						}
					});
				});
				return res;
			},
			error = [],
			name, i18, i18nFolderName, prevId;
		

		if (data.options) {
			normalizeOptions(data.options);
		}
		
		if (data.cwd) {
			if (data.cwd.volumeid && data.options && Object.keys(data.options).length && self.isRoot(data.cwd)) {
				self.volOptions[data.cwd.volumeid] = data.options;
			}
			data.cwd = filter(data.cwd);
		}
		if (data.files) {
			data.files = $.map(data.files, filter);
		} 
		if (data.tree) {
			data.tree = $.map(data.tree, filter);
		}
		if (data.added) {
			data.added = $.map(data.added, filter);
		}
		if (data.changed) {
			data.changed = $.map(data.changed, filter);
		}
		if (data.removed && data.removed.length && self.searchStatus.state === 2) {
			data.removed = data.removed.concat(getDescendants(data.removed));
		}
		if (data.api) {
			data.init = true;
		}

		// merge options that apply only to cwd
		if (data.cwd && data.cwd.options && data.options) {
			Object.assign(data.options, normalizeOptions(data.cwd.options));
		}
		
		// check error
		if (error.length) {
			data.norError = ['errResponse'].concat(error);
		}
		
		return data;
	},
	
	/**
	 * Update sort options
	 *
	 * @param {String} sort type
	 * @param {String} sort order
	 * @param {Boolean} show folder first
	 */
	setSort : function(type, order, stickFolders, alsoTreeview) {
		this.storage('sortType', (this.sortType = this.sortRules[type] ? type : 'name'));
		this.storage('sortOrder', (this.sortOrder = /asc|desc/.test(order) ? order : 'asc'));
		this.storage('sortStickFolders', (this.sortStickFolders = !!stickFolders) ? 1 : '');
		this.storage('sortAlsoTreeview', (this.sortAlsoTreeview = !!alsoTreeview) ? 1 : '');
		this.trigger('sortchange');
	},
	
	_sortRules : {
		name : function(file1, file2) {
			return elFinder.prototype.naturalCompare(file1.i18 || file1.name, file2.i18 || file2.name);
		},
		size : function(file1, file2) { 
			var size1 = parseInt(file1.size) || 0,
				size2 = parseInt(file2.size) || 0;
				
			return size1 === size2 ? 0 : size1 > size2 ? 1 : -1;
		},
		kind : function(file1, file2) {
			return elFinder.prototype.naturalCompare(file1.mime, file2.mime);
		},
		date : function(file1, file2) { 
			var date1 = file1.ts || file1.date,
				date2 = file2.ts || file2.date;

			return date1 === date2 ? 0 : date1 > date2 ? 1 : -1
		},
		perm : function(file1, file2) { 
			var val = function(file) { return (file.write? 2 : 0) + (file.read? 1 : 0); },
				v1  = val(file1),
				v2  = val(file2);
			return v1 === v2 ? 0 : v1 > v2 ? 1 : -1
		},
		mode : function(file1, file2) { 
			var v1 = file1.mode || (file1.perm || ''),
				v2 = file2.mode || (file2.perm || '');
			return elFinder.prototype.naturalCompare(v1, v2);
		},
		owner : function(file1, file2) { 
			var v1 = file1.owner || '',
				v2 = file2.owner || '';
			return elFinder.prototype.naturalCompare(v1, v2);
		},
		group : function(file1, file2) { 
			var v1 = file1.group || '',
				v2 = file2.group || '';
			return elFinder.prototype.naturalCompare(v1, v2);
		}
	},
	
	/**
	 * Valid sort rule names
	 * 
	 * @type Array
	 */
	sorters : [],
	
	/**
	 * Compare strings for natural sort
	 *
	 * @param  String
	 * @param  String
	 * @return Number
	 */
	naturalCompare : function(a, b) {
		var self = elFinder.prototype.naturalCompare;
		if (typeof self.loc == 'undefined') {
			self.loc = (navigator.userLanguage || navigator.browserLanguage || navigator.language || 'en-US');
		}
		if (typeof self.sort == 'undefined') {
			if ('11'.localeCompare('2', self.loc, {numeric: true}) > 0) {
				// Native support
				if (window.Intl && window.Intl.Collator) {
					self.sort = new Intl.Collator(self.loc, {numeric: true}).compare;
				} else {
					self.sort = function(a, b) {
						return a.localeCompare(b, self.loc, {numeric: true});
					};
				}
			} else {
				/*
				 * Edited for elFinder (emulates localeCompare() by numeric) by Naoki Sawada aka nao-pon
				 */
				/*
				 * Huddle/javascript-natural-sort (https://github.com/Huddle/javascript-natural-sort)
				 */
				/*
				 * Natural Sort algorithm for Javascript - Version 0.7 - Released under MIT license
				 * Author: Jim Palmer (based on chunking idea from Dave Koelle)
				 * http://opensource.org/licenses/mit-license.php
				 */
				self.sort = function(a, b) {
					var re = /(^-?[0-9]+(\.?[0-9]*)[df]?e?[0-9]?$|^0x[0-9a-f]+$|[0-9]+)/gi,
					sre = /(^[ ]*|[ ]*$)/g,
					dre = /(^([\w ]+,?[\w ]+)?[\w ]+,?[\w ]+\d+:\d+(:\d+)?[\w ]?|^\d{1,4}[\/\-]\d{1,4}[\/\-]\d{1,4}|^\w+, \w+ \d+, \d{4})/,
					hre = /^0x[0-9a-f]+$/i,
					ore = /^0/,
					syre = /^[\x01\x21-\x2f\x3a-\x40\x5b-\x60\x7b-\x7e]/, // symbol first - (Naoki Sawada)
					i = function(s) { return self.sort.insensitive && (''+s).toLowerCase() || ''+s },
					// convert all to strings strip whitespace
					// first character is "_", it's smallest - (Naoki Sawada)
					x = i(a).replace(sre, '').replace(/^_/, "\x01") || '',
					y = i(b).replace(sre, '').replace(/^_/, "\x01") || '',
					// chunk/tokenize
					xN = x.replace(re, '\0$1\0').replace(/\0$/,'').replace(/^\0/,'').split('\0'),
					yN = y.replace(re, '\0$1\0').replace(/\0$/,'').replace(/^\0/,'').split('\0'),
					// numeric, hex or date detection
					xD = parseInt(x.match(hre)) || (xN.length != 1 && x.match(dre) && Date.parse(x)),
					yD = parseInt(y.match(hre)) || xD && y.match(dre) && Date.parse(y) || null,
					oFxNcL, oFyNcL,
					locRes = 0;

					// first try and sort Hex codes or Dates
					if (yD) {
						if ( xD < yD ) return -1;
						else if ( xD > yD ) return 1;
					}
					// natural sorting through split numeric strings and default strings
					for(var cLoc=0, numS=Math.max(xN.length, yN.length); cLoc < numS; cLoc++) {

						// find floats not starting with '0', string or 0 if not defined (Clint Priest)
						oFxNcL = !(xN[cLoc] || '').match(ore) && parseFloat(xN[cLoc]) || xN[cLoc] || 0;
						oFyNcL = !(yN[cLoc] || '').match(ore) && parseFloat(yN[cLoc]) || yN[cLoc] || 0;

						// handle numeric vs string comparison - number < string - (Kyle Adams)
						// but symbol first < number - (Naoki Sawada)
						if (isNaN(oFxNcL) !== isNaN(oFyNcL)) {
							if (isNaN(oFxNcL) && (typeof oFxNcL !== 'string' || ! oFxNcL.match(syre))) {
								return 1;
							} else if (typeof oFyNcL !== 'string' || ! oFyNcL.match(syre)) {
								return -1;
							}
						}

						// use decimal number comparison if either value is string zero
						if (parseInt(oFxNcL, 10) === 0) oFxNcL = 0;
						if (parseInt(oFyNcL, 10) === 0) oFyNcL = 0;

						// rely on string comparison if different types - i.e. '02' < 2 != '02' < '2'
						if (typeof oFxNcL !== typeof oFyNcL) {
							oFxNcL += '';
							oFyNcL += '';
						}

						// use locale sensitive sort for strings when case insensitive
						// note: localeCompare interleaves uppercase with lowercase (e.g. A,a,B,b)
						if (self.sort.insensitive && typeof oFxNcL === 'string' && typeof oFyNcL === 'string') {
							locRes = oFxNcL.localeCompare(oFyNcL, self.loc);
							if (locRes !== 0) return locRes;
						}

						if (oFxNcL < oFyNcL) return -1;
						if (oFxNcL > oFyNcL) return 1;
					}
					return 0;
				};
				self.sort.insensitive = true;
			}
		}
		return self.sort(a, b);
	},
	
	/**
	 * Compare files based on elFinder.sort
	 *
	 * @param  Object  file
	 * @param  Object  file
	 * @return Number
	 */
	compare : function(file1, file2) {
		var self  = this,
			type  = self.sortType,
			asc   = self.sortOrder == 'asc',
			stick = self.sortStickFolders,
			rules = self.sortRules,
			sort  = rules[type],
			d1    = file1.mime == 'directory',
			d2    = file2.mime == 'directory',
			res;
			
		if (stick) {
			if (d1 && !d2) {
				return -1;
			} else if (!d1 && d2) {
				return 1;
			}
		}
		
		res = asc ? sort(file1, file2) : sort(file2, file1);
		
		return type !== 'name' && res === 0
			? res = asc ? rules.name(file1, file2) : rules.name(file2, file1)
			: res;
	},
	
	/**
	 * Sort files based on config
	 *
	 * @param  Array  files
	 * @return Array
	 */
	sortFiles : function(files) {
		return files.sort(this.compare);
	},
	
	/**
	 * Open notification dialog 
	 * and append/update message for required notification type.
	 *
	 * @param  Object  options
	 * @example  
	 * this.notify({
	 *    type : 'copy',
	 *    msg : 'Copy files', // not required for known types @see this.notifyType
	 *    cnt : 3,
	 *    hideCnt  : false,   // true for not show count
	 *    progress : 10,      // progress bar percents (use cnt : 0 to update progress bar)
	 *    cancel   : callback // callback function for cancel button
	 * })
	 * @return elFinder
	 */
	notify : function(opts) {
		var type     = opts.type,
			msg      = this.i18n((typeof opts.msg !== 'undefined')? opts.msg : (this.messages['ntf'+type] ? 'ntf'+type : 'ntfsmth')),
			ndialog  = this.ui.notify,
			notify   = ndialog.children('.elfinder-notify-'+type),
			button   = notify.children('div.elfinder-notify-cancel').children('button'),
			ntpl     = '<div class="elfinder-notify elfinder-notify-{type}"><span class="elfinder-dialog-icon elfinder-dialog-icon-{type}"/><span class="elfinder-notify-msg">{msg}</span> <span class="elfinder-notify-cnt"/><div class="elfinder-notify-progressbar"><div class="elfinder-notify-progress"/></div><div class="elfinder-notify-cancel"/></div>',
			delta    = opts.cnt,
			size     = (typeof opts.size != 'undefined')? parseInt(opts.size) : null,
			progress = (typeof opts.progress != 'undefined' && opts.progress >= 0) ? opts.progress : null,
			cancel   = opts.cancel,
			clhover  = 'ui-state-hover',
			close    = function() {
				notify._esc && $(document).off('keydown', notify._esc);
				notify.remove();
				!ndialog.children().length && ndialog.elfinderdialog('close');
			},
			cnt, total, prc;

		if (!type) {
			return this;
		}
		
		if (!notify.length) {
			notify = $(ntpl.replace(/\{type\}/g, type).replace(/\{msg\}/g, msg))
				.appendTo(ndialog)
				.data('cnt', 0);

			if (progress != null) {
				notify.data({progress : 0, total : 0});
			}

			if (cancel) {
				button = $('<button type="button" class="ui-button ui-widget ui-state-default ui-corner-all ui-button-text-only"><span class="ui-button-text">'+this.i18n('btnCancel')+'</span></button>')
					.hover(function(e) { 
						$(this).toggleClass(clhover, e.type == 'mouseenter');
					});
				notify.children('div.elfinder-notify-cancel').append(button);
			}
		} else if (typeof opts.msg !== 'undefined') {
			notify.children('span.elfinder-notify-msg').html(msg);
		}

		cnt = delta + parseInt(notify.data('cnt'));
		
		if (cnt > 0) {
			if (cancel && button.length) {
				if ($.isFunction(cancel) || (typeof cancel === 'object' && cancel.promise)) {
					notify._esc = function(e) {
						if (e.type == 'keydown' && e.keyCode != $.ui.keyCode.ESCAPE) {
							return;
						}
						e.preventDefault();
						e.stopPropagation();
						close();
						if (cancel.promise) {
							if (cancel.xhr) {
								cancel.xhr.quiet = true;
								cancel.xhr.abort();
							}
							cancel.reject();
						} else {
							cancel(e);
						}
					};
					button.on('click', function(e) {
						notify._esc(e);
					});
					$(document).on('keydown.' + this.namespace, notify._esc);
				}
			}
			
			!opts.hideCnt && notify.children('.elfinder-notify-cnt').text('('+cnt+')');
			ndialog.is(':hidden') && ndialog.elfinderdialog('open', this);
			notify.data('cnt', cnt);
			
			if ((progress != null)
			&& (total = notify.data('total')) >= 0
			&& (prc = notify.data('progress')) >= 0) {

				total += size != null? size : delta;
				prc   += progress;
				(size == null && delta < 0) && (prc += delta * 100);
				notify.data({progress : prc, total : total});
				if (size != null) {
					prc *= 100;
					total = Math.max(1, total);
				}
				progress = parseInt(prc/total);
				
				notify.find('.elfinder-notify-progress')
					.animate({
						width : (progress < 100 ? progress : 100)+'%'
					}, 20);
			}
			
		} else {
			close();
		}
		
		return this;
	},
	
	/**
	 * Open confirmation dialog 
	 *
	 * @param  Object  options
	 * @example  
	 * this.confirm({
	 *    title : 'Remove files',
	 *    text  : 'Here is question text',
	 *    accept : {  // accept callback - required
	 *      label : 'Continue',
	 *      callback : function(applyToAll) { fm.log('Ok') }
	 *    },
	 *    cancel : { // cancel callback - required
	 *      label : 'Cancel',
	 *      callback : function() { fm.log('Cancel')}
	 *    },
	 *    reject : { // reject callback - optionally
	 *      label : 'No',
	 *      callback : function(applyToAll) { fm.log('No')}
	 *    },
	 *    buttons : [ // additional buttons callback - optionally
	 *      {
	 *        label : 'Btn1',
	 *        callback : function(applyToAll) { fm.log('Btn1')}
	 *      }
	 *    ],
	 *    all : true  // display checkbox "Apply to all"
	 * })
	 * @return elFinder
	 */
	confirm : function(opts) {
		var self     = this,
			complete = false,
			options = {
				cssClass  : 'elfinder-dialog-confirm',
				modal     : true,
				resizable : false,
				title     : this.i18n(opts.title || 'confirmReq'),
				buttons   : {},
				close     : function() { 
					!complete && opts.cancel.callback();
					$(this).elfinderdialog('destroy');
				}
			},
			apply = this.i18n('apllyAll'),
			label, checkbox;

		
		options.buttons[this.i18n(opts.accept.label)] = function() {
			opts.accept.callback(!!(checkbox && checkbox.prop('checked')))
			complete = true;
			$(this).elfinderdialog('close');
		};
		
		if (opts.reject) {
			options.buttons[this.i18n(opts.reject.label)] = function() {
				opts.reject.callback(!!(checkbox && checkbox.prop('checked')))
				complete = true;
				$(this).elfinderdialog('close');
			};
		}
		
		if (opts.buttons && opts.buttons.length > 0) {
			$.each(opts.buttons, function(i, v){
				options.buttons[self.i18n(v.label)] = function() {
					v.callback(!!(checkbox && checkbox.prop('checked')))
					complete = true;
					$(this).elfinderdialog('close');
				};
			});
		}
		
		options.buttons[this.i18n(opts.cancel.label)] = function() {
			$(this).elfinderdialog('close');
		};
		
		if (opts.all) {
			options.create = function() {
				var base = $('<div class="elfinder-dialog-confirm-applyall"/>');
				checkbox = $('<input type="checkbox" />');
				$(this).next().find('.ui-dialog-buttonset')
					.prepend(base.append($('<label>'+apply+'</label>').prepend(checkbox)));
			}
		}
		
		if (opts.optionsCallback && $.isFunction(opts.optionsCallback)) {
			opts.optionsCallback(options);
		}
		
		return this.dialog('<span class="elfinder-dialog-icon elfinder-dialog-icon-confirm"/>' + this.i18n(opts.text), options);
	},
	
	/**
	 * Create unique file name in required dir
	 * 
	 * @param  String  file name
	 * @param  String  parent dir hash
	 * @param  String  glue
	 * @return String
	 */
	uniqueName : function(prefix, phash, glue) {
		var i = 0, ext = '', p, name;
		
		prefix = this.i18n(false, prefix);
		phash = phash || this.cwd().hash;
		glue = (typeof glue === 'undefined')? ' ' : glue;

		if (p = prefix.match(/^(.+)(\.[^.]+)$/)) {
			ext    = p[2];
			prefix = p[1];
		}
		
		name   = prefix+ext;
		
		if (!this.fileByName(name, phash)) {
			return name;
		}
		while (i < 10000) {
			name = prefix + glue + (++i) + ext;
			if (!this.fileByName(name, phash)) {
				return name;
			}
		}
		return prefix + Math.random() + ext;
	},
	
	/**
	 * Return message translated onto current language
	 * Allowed accept HTML element that was wrapped in jQuery object
	 * To be careful to XSS vulnerability of HTML element Ex. You should use `fm.escape(file.name)`
	 *
	 * @param  String|Array  message[s]|Object jQuery
	 * @return String
	 **/
	i18n : function() {
		var self = this,
			messages = this.messages, 
			input    = [],
			ignore   = [], 
			message = function(m) {
				var file;
				if (m.indexOf('#') === 0) {
					if ((file = self.file(m.substr(1)))) {
						return file.name;
					}
				}
				return m;
			},
			i, j, m, escFunc, start = 0;
		
		if (arguments.length && arguments[0] === false) {
			escFunc = function(m){ return m; };
			start = 1;
		}
		for (i = start; i< arguments.length; i++) {
			m = arguments[i];
			
			if (Array.isArray(m)) {
				for (j = 0; j < m.length; j++) {
					if (m[j] instanceof jQuery) {
						// jQuery object is HTML element
						input.push(m[j]);
					} else if (typeof m[j] !== 'undefined'){
						input.push(message('' + m[j]));
					}
				}
			} else if (m instanceof jQuery) {
				// jQuery object is HTML element
				input.push(m[j]);
			} else if (typeof m !== 'undefined'){
				input.push(message('' + m));
			}
		}
		
		for (i = 0; i < input.length; i++) {
			// dont translate placeholders
			if ($.inArray(i, ignore) !== -1) {
				continue;
			}
			m = input[i];
			if (typeof m == 'string') {
				// translate message
				m = messages[m] || (escFunc? escFunc(m) : self.escape(m));
				// replace placeholders in message
				m = m.replace(/\$(\d+)/g, function(match, placeholder) {
					placeholder = i + parseInt(placeholder);
					if (placeholder > 0 && input[placeholder]) {
						ignore.push(placeholder)
					}
					return escFunc? escFunc(input[placeholder]) : self.escape(input[placeholder]);
				});
			} else {
				// get HTML from jQuery object
				m = m.get(0).outerHTML;
			}

			input[i] = m;
		}

		return $.map(input, function(m, i) { return $.inArray(i, ignore) === -1 ? m : null; }).join('<br>');
	},
	
	/**
	 * Get icon style from file.icon
	 * 
	 * @param  Object  elFinder file object
	 * @return String|Object
	 */
	getIconStyle : function(file, asObject) {
		var self = this,
			template = {
				'background' : 'url(\'{url}\') 0 0 no-repeat',
				'background-size' : 'contain'
			},
			style = '',
			cssObj = {},
			i = 0;
		if (file.icon) {
			style = 'style="';
			$.each(template, function(k, v) {
				if (i++ === 0) {
					v = v.replace('{url}', self.escape(file.icon));
				}
				if (asObject) {
					cssObj[k] = v;
				} else {
					style += k+':'+v+';'
				}
			});
			style += '"';
		}
		return asObject? cssObj : style;
	},
	
	/**
	 * Convert mimetype into css classes
	 * 
	 * @param  String  file mimetype
	 * @return String
	 */
	mime2class : function(mime) {
		var prefix = 'elfinder-cwd-icon-';
		
		mime = mime.split('/');
		
		return prefix+mime[0]+(mime[0] != 'image' && mime[1] ? ' '+prefix+mime[1].replace(/(\.|\+)/g, '-') : '');
	},
	
	/**
	 * Return localized kind of file
	 * 
	 * @param  Object|String  file or file mimetype
	 * @return String
	 */
	mime2kind : function(f) {
		var isObj = typeof(f) == 'object' ? true : false,
			mime  = isObj ? f.mime : f,
			kind;
		

		if (isObj && f.alias && mime != 'symlink-broken') {
			kind = 'Alias';
		} else if (this.kinds[mime]) {
			if (isObj && mime === 'directory' && (! f.phash || f.isroot)) {
				kind = 'Root';
			} else {
				kind = this.kinds[mime];
			}
		}
		if (! kind) {
			if (mime.indexOf('text') === 0) {
				kind = 'Text';
			} else if (mime.indexOf('image') === 0) {
				kind = 'Image';
			} else if (mime.indexOf('audio') === 0) {
				kind = 'Audio';
			} else if (mime.indexOf('video') === 0) {
				kind = 'Video';
			} else if (mime.indexOf('application') === 0) {
				kind = 'App';
			} else {
				kind = mime;
			}
		}
		
		return this.messages['kind'+kind] ? this.i18n('kind'+kind) : mime;
	},
	
	/**
	 * Returns a date string formatted according to the given format string
	 * 
	 * @param  String  format string
	 * @param  Object  Date object
	 * @return String
	 */
	date : function(format, date) {
		var self = this,
			output, d, dw, m, y, h, g, i, s;
		
		if (! date) {
			date = new Date();
		}
		
		h  = date[self.getHours]();
		g  = h > 12 ? h - 12 : h;
		i  = date[self.getMinutes]();
		s  = date[self.getSeconds]();
		d  = date[self.getDate]();
		dw = date[self.getDay]();
		m  = date[self.getMonth]() + 1;
		y  = date[self.getFullYear]();
		
		output = format.replace(/[a-z]/gi, function(val) {
			switch (val) {
				case 'd': return d > 9 ? d : '0'+d;
				case 'j': return d;
				case 'D': return self.i18n(self.i18.daysShort[dw]);
				case 'l': return self.i18n(self.i18.days[dw]);
				case 'm': return m > 9 ? m : '0'+m;
				case 'n': return m;
				case 'M': return self.i18n(self.i18.monthsShort[m-1]);
				case 'F': return self.i18n(self.i18.months[m-1]);
				case 'Y': return y;
				case 'y': return (''+y).substr(2);
				case 'H': return h > 9 ? h : '0'+h;
				case 'G': return h;
				case 'g': return g;
				case 'h': return g > 9 ? g : '0'+g;
				case 'a': return h >= 12 ? 'pm' : 'am';
				case 'A': return h >= 12 ? 'PM' : 'AM';
				case 'i': return i > 9 ? i : '0'+i;
				case 's': return s > 9 ? s : '0'+s;
			}
			return val;
		});
		
		return output;
	},
	
	/**
	 * Return localized date
	 * 
	 * @param  Object  file object
	 * @return String
	 */
	formatDate : function(file, ts) {
		var self = this, 
			ts   = ts || file.ts, 
			i18  = self.i18,
			date, format, output, d, dw, m, y, h, g, i, s;

		if (self.options.clientFormatDate && ts > 0) {

			date = new Date(ts*1000);
			format = ts >= this.yesterday 
				? this.fancyFormat 
				: this.dateFormat;

			output = self.date(format, date);
			
			return ts >= this.yesterday
				? output.replace('$1', this.i18n(ts >= this.today ? 'Today' : 'Yesterday'))
				: output;
		} else if (file.date) {
			return file.date.replace(/([a-z]+)\s/i, function(a1, a2) { return self.i18n(a2)+' '; });
		}
		
		return self.i18n('dateUnknown');
	},
	
	/**
	 * Return css class marks file permissions
	 * 
	 * @param  Object  file 
	 * @return String
	 */
	perms2class : function(o) {
		var c = '';
		
		if (!o.read && !o.write) {
			c = 'elfinder-na';
		} else if (!o.read) {
			c = 'elfinder-wo';
		} else if (!o.write) {
			c = 'elfinder-ro';
		}
		
		if (o.type) {
			c += ' elfinder-' + this.escape(o.type);
		}
		
		return c;
	},
	
	/**
	 * Return localized string with file permissions
	 * 
	 * @param  Object  file
	 * @return String
	 */
	formatPermissions : function(f) {
		var p  = [];
			
		f.read && p.push(this.i18n('read'));
		f.write && p.push(this.i18n('write'));	

		return p.length ? p.join(' '+this.i18n('and')+' ') : this.i18n('noaccess');
	},
	
	/**
	 * Return formated file size
	 * 
	 * @param  Number  file size
	 * @return String
	 */
	formatSize : function(s) {
		var n = 1, u = 'b';
		
		if (s == 'unknown') {
			return this.i18n('unknown');
		}
		
		if (s > 1073741824) {
			n = 1073741824;
			u = 'GB';
		} else if (s > 1048576) {
			n = 1048576;
			u = 'MB';
		} else if (s > 1024) {
			n = 1024;
			u = 'KB';
		}
		s = s/n;
		return (s > 0 ? n >= 1048576 ? s.toFixed(2) : Math.round(s) : 0) +' '+u;
	},
	
	/**
	 * Return formated file mode by options.fileModeStyle
	 * 
	 * @param  String  file mode
	 * @param  String  format style
	 * @return String
	 */
	formatFileMode : function(p, style) {
		var i, o, s, b, sticy, suid, sgid, str, oct;
		
		if (!style) {
			style = this.options.fileModeStyle.toLowerCase();
		}
		p = $.trim(p);
		if (p.match(/[rwxs-]{9}$/i)) {
			str = p = p.substr(-9);
			if (style == 'string') {
				return str;;
			}
			oct = '';
			s = 0;
			for (i=0; i<7; i=i+3) {
				o = p.substr(i, 3);
				b = 0;
				if (o.match(/[r]/i)) {
					b += 4;
				}
				if (o.match(/[w]/i)) {
					b += 2;
				}
				if (o.match(/[xs]/i)) {
					if (o.match(/[xs]/)) {
						b += 1;
					}
					if (o.match(/[s]/i)) {
						if (i == 0) {
							s += 4;
						} else if (i == 3) {
							s += 2;
						}
					}
				}
				oct += b.toString(8);
			}
			if (s) {
				oct = s.toString(8) + oct;
			}
		} else {
			p = parseInt(p, 8);
			oct = p? p.toString(8) : '';
			if (!p || style == 'octal') {
				return oct;
			}
			o = p.toString(8);
			s = 0;
			if (o.length > 3) {
				o = o.substr(-4);
				s = parseInt(o.substr(0, 1), 8);
				o = o.substr(1);
			}
			sticy = ((s & 1) == 1); // not support
			sgid = ((s & 2) == 2);
			suid = ((s & 4) == 4);
			str = '';
			for(i=0; i<3; i++) {
				if ((parseInt(o.substr(i, 1), 8) & 4) == 4) {
					str += 'r';
				} else {
					str += '-';
				}
				if ((parseInt(o.substr(i, 1), 8) & 2) == 2) {
					str += 'w';
				} else {
					str += '-';
				}
				if ((parseInt(o.substr(i, 1), 8) & 1) == 1) {
					str += ((i==0 && suid)||(i==1 && sgid))? 's' : 'x';
				} else {
					str += '-';
				}
			}
		}
		if (style == 'both') {
			return str + ' (' + oct + ')';
		} else if (style == 'string') {
			return str;
		} else {
			return oct;
		}
	},
	
	/**
	 * Return boolean that uploadable MIME type into target folder
	 * 
	 * @param  String  mime    MIME type
	 * @param  String  target  target folder hash
	 * @return Bool
	 */
	uploadMimeCheck : function(mime, target) {
		target = target || this.cwd().hash;
		var res   = true, // default is allow
			mimeChecker = this.option('uploadMime', target),
			allow,
			deny,
			check = function(checker) {
				var ret = false;
				if (typeof checker === 'string' && checker.toLowerCase() === 'all') {
					ret = true;
				} else if (Array.isArray(checker) && checker.length) {
					$.each(checker, function(i, v) {
						v = v.toLowerCase();
						if (v === 'all' || mime.indexOf(v) === 0) {
							ret = true;
							return false;
						}
					});
				}
				return ret;
			};
		if (mime && $.isPlainObject(mimeChecker)) {
			mime = mime.toLowerCase();
			allow = check(mimeChecker.allow);
			deny = check(mimeChecker.deny);
			if (mimeChecker.firstOrder === 'allow') {
				res = false; // default is deny
				if (! deny && allow === true) { // match only allow
					res = true;
				}
			} else {
				res = true; // default is allow
				if (deny === true && ! allow) { // match only deny
					res = false;
				}
			}
		}
		return res;
	},
	
	/**
	 * call chained sequence of async deferred functions
	 * 
	 * @param  Array   tasks async functions
	 * @return Object  jQuery.Deferred
	 */
	sequence : function(tasks) {
		var l = tasks.length,
			chain = function(task, idx) {
				++idx;
				if (tasks[idx]) {
					return chain(task.then(tasks[idx]), idx);
				} else {
					return task;
				}
			};
		if (l > 1) {
			return chain(tasks[0](), 0);
		} else {
			return tasks[0]();
		}
	},
	
	/**
	 * Reload contents of target URL for clear browser cache
	 * 
	 * @param  String  url target URL
	 * @return Object  jQuery.Deferred
	 */
	reloadContents : function(url) {
		var dfd = $.Deferred(),
			ifm;
		try {
			ifm = $('<iframe width="1" height="1" scrolling="no" frameborder="no" style="position:absolute; top:-1px; left:-1px" crossorigin="use-credentials">')
				.attr('src', url)
				.one('load', function() {
					var ifm = $(this);
					try {
						this.contentDocument.location.reload(true);
						ifm.one('load', function() {
							ifm.remove();
							dfd.resolve();
						});
					} catch(e) {
						ifm.attr('src', '').attr('src', url).one('load', function() {
							ifm.remove();
							dfd.resolve();
						});
					}
				})
				.appendTo('body');
		} catch(e) {
			ifm && ifm.remove();
			dfd.reject();
		}
		return dfd;
	},
	
	/**
	 * Make netmount option for OAuth2
	 * 
	 * @param  String   protocol
	 * @param  String   name
	 * @param  String   host
	 * @param  Object   opts  Default {noOffline: false, root: 'root', pathI18n: 'folderId', folders: true}
			}
	 * 
	 * @return Object
	 */
	makeNetmountOptionOauth : function(protocol, name, host, opts) {
		var noOffline = typeof opts === 'boolean'? opts : null, // for backward compat
			opts = Object.assign({
				noOffline : false,
				root      : 'root',
				pathI18n  : 'folderId',
				folders   : true
			}, (noOffline === null? (opts || {}) : {noOffline : noOffline})),
			addFolders = function(fm, bro, folders) {
				var self = this,
					cnt  = Object.keys($.isPlainObject(folders)? folders : {}).length,
					select;
				
				bro.next().remove();
				if (cnt) {
					select = $('<select class="ui-corner-all elfinder-tabstop" style="max-width:200px;">').append(
						$($.map(folders, function(n,i){return '<option value="'+fm.escape((i+'').trim())+'">'+fm.escape(n)+'</option>'}).join(''))
					).on('change click', function(e){
						var node = $(this),
							path = node.val(),
							spn;
						self.inputs.path.val(path);
						if (opts.folders && (e.type === 'change' || node.data('current') !== path)) {
							node.next().remove();
							node.data('current', path);
							if (path != opts.root) {
								spn = spinner();
								if (xhr && xhr.state() === 'pending') {
									xhr.quiet = true;
									xhr.abort();
								}
								node.after(spn);
								xhr = fm.request({
									data : {cmd : 'netmount', protocol: protocol, host: host, user: 'init', path: path, pass: 'folders'},
									preventDefault : true
								}).done(function(data){
									addFolders.call(self, fm, node, data.folders);
								}).always(function() {
									xhr = null;
									spn.remove();
								}).xhr;
							}
						}
					});
					bro.after($('<div/>').append(select));
					select.focus();
				}
			},
			spinner = function() {
				return $('<div class="elfinder-netmount-spinner"/>').append('<span class="elfinder-info-spinner"/>');
			},
			xhr;
		return {
			vars : {},
			name : name,
			inputs: {
				offline  : $('<input type="checkbox"/>').on('change', function() {
					$(this).parents('table.elfinder-netmount-tb').find('select:first').trigger('change', 'reset');
				}),
				host     : $('<span><span class="elfinder-info-spinner"/></span><input type="hidden"/>'),
				path     : $('<input type="text" value="'+opts.root+'"/>'),
				user     : $('<input type="hidden"/>'),
				pass     : $('<input type="hidden"/>')
			},
			select: function(fm, ev, data){
				var f = this.inputs,
					oline = f.offline,
					f0 = $(f.host[0]),
					data = data || null;
				this.vars.mbtn = f.host.closest('.ui-dialog').children('.ui-dialog-buttonpane:first').find('button.elfinder-btncnt-0');
				if (! f0.data('inrequest')
						&& (f0.find('span.elfinder-info-spinner').length
							|| data === 'reset'
							|| (data === 'winfocus' && ! f0.siblings('span.elfinder-button-icon-reload').length))
							)
				{
					if (oline.parent().children().length === 1) {
						f.path.parent().prev().html(fm.i18n(opts.pathI18n));
						oline.attr('title', fm.i18n('offlineAccess'));
						oline.uniqueId().after($('<label/>').attr('for', oline.attr('id')).html(' '+fm.i18n('offlineAccess')));
					}
					f0.data('inrequest', true).empty().addClass('elfinder-info-spinner')
						.parent().find('span.elfinder-button-icon').remove();
					fm.request({
						data : {cmd : 'netmount', protocol: protocol, host: host, user: 'init', options: {id: fm.id, offline: oline.prop('checked')? 1:0, pass: f.host[1].value}},
						preventDefault : true
					}).done(function(data){
						f0.removeClass("elfinder-info-spinner").html(data.body.replace(/\{msg:([^}]+)\}/g, function(whole,s1){return fm.i18n(s1, host);}));
					});
					opts.noOffline && oline.closest('tr').hide();
				} else {
					oline.closest('tr')[(opts.noOffline || f.user.val())? 'hide':'show']();
					f0.data('funcexpup') && f0.data('funcexpup')();
				}
				this.vars.mbtn[$(f.host[1]).val()? 'show':'hide']();
			},
			done: function(fm, data){
				var f = this.inputs,
					p = this.protocol,
					f0 = $(f.host[0]),
					f1 = $(f.host[1]),
					expires = '&nbsp;';
				
				opts.noOffline && f.offline.closest('tr').hide();
				if (data.mode == 'makebtn') {
					f0.removeClass('elfinder-info-spinner').removeData('expires').removeData('funcexpup');
					f.host.find('input').hover(function(){$(this).toggleClass('ui-state-hover');});
					f1.val('');
					f.path.val(opts.root).next().remove();
					f.user.val('');
					f.pass.val('');
					! opts.noOffline && f.offline.closest('tr').show();
					this.vars.mbtn.hide();
				} else if (data.mode == 'folders') {
					if (data.folders) {
						addFolders.call(this, fm, f.path.nextAll(':last'), data.folders);
					}
				} else {
					if (data.expires) {
						expires = '()';
						f0.data('expires', data.expires);
					}
					f0.html(host + expires).removeClass('elfinder-info-spinner');
					if (data.expires) {
						f0.data('funcexpup', function() {
							var rem = Math.floor((f0.data('expires') - (+new Date()) / 1000) / 60);
							if (rem < 3) {
								f0.parent().children('.elfinder-button-icon-reload').click();
							} else {
								f0.text(f0.text().replace(/\(.*\)/, '('+fm.i18n(['minsLeft', rem])+')'));
								setTimeout(function() {
									if (f0.is(':visible')) {
										f0.data('funcexpup')();
									}
								}, 60000);
							}
						});
						f0.data('funcexpup')();
					}
					if (data.reset) {
						p.trigger('change', 'reset');
						return;
					}
					f0.parent().append($('<span class="elfinder-button-icon elfinder-button-icon-reload" title="'+fm.i18n('reAuth')+'">')
						.on('click', function() {
							f1.val('reauth');
							p.trigger('change', 'reset');
						}));
					f1.val(protocol);
					this.vars.mbtn.show();
					if (data.folders) {
						addFolders.call(this, fm, f.path, data.folders);
					}
					f.user.val('done');
					f.pass.val('done');
					f.offline.closest('tr').hide();
				}
				f0.removeData('inrequest');
			},
			fail: function(fm, err){
				$(this.inputs.host[0]).removeData('inrequest');
				this.protocol.trigger('change', 'reset');
			}
		};
	},
	
	/**
	 * Find cwd's nodes from files
	 * 
	 * @param  Array    files
	 * @param  Object   opts   {firstOnly: true|false}
	 */
	findCwdNodes : function(files, opts) {
		var self    = this,
			cwd     = this.getUI('cwd'),
			cwdHash = this.cwd().hash,
			newItem = $();
		
		opts = opts || {};
		
		$.each(files, function(i, f) {
			if (f.phash === cwdHash || self.searchStatus.state > 1) {
				newItem = newItem.add(cwd.find('#'+self.cwdHash2Id(f.hash)));
				if (opts.firstOnly) {
					return false;
				}
			}
		});
		
		return newItem;
	},
	
	/**
	 * Convert from relative URL to abstract URL based on current URL
	 * 
	 * @param  String  URL
	 * @return String
	 */
	convAbsUrl : function(url) {
		if (url.match(/^http/i)) {
			return url;
		}
		if (url.substr(0,2) === '//') {
			return window.location.protocol + url;
		}
		var root = window.location.protocol + '//' + window.location.host,
			reg  = /[^\/]+\/\.\.\//,
			ret;
		if (url.substr(0, 1) === '/') {
			ret = root + url;
		} else {
			ret = root + window.location.pathname.replace(/\/[^\/]+$/, '/') + url;
		}
		ret = ret.replace('/./', '/');
		while(reg.test(ret)) {
			ret = ret.replace(reg, '');
		}
		return ret;
	},
	
	navHash2Id : function(hash) {
		return this.navPrefix + hash;
	},
	
	navId2Hash : function(id) {
		return typeof(id) == 'string' ? id.substr(this.navPrefix.length) : false;
	},
	
	cwdHash2Id : function(hash) {
		return this.cwdPrefix + hash;
	},
	
	cwdId2Hash : function(id) {
		return typeof(id) == 'string' ? id.substr(this.cwdPrefix.length) : false;
	},
	
	isInWindow : function(elem, nochkHide) {
		var elm, rect;
		if (! (elm = elem.get(0))) {
			return false;
		}
		if (! nochkHide && elm.offsetParent === null) {
			return false;
		}
		rect = elm.getBoundingClientRect();
		return document.elementFromPoint(rect.left, rect.top)? true : false;
	},
	
	/**
	 * calculate elFinder node z-index
	 * 
	 * @return void
	 */
	zIndexCalc : function() {
		var self = this,
			node = this.getUI(),
			ni = node.css('z-index');
		if (ni && ni !== 'auto' && ni !== 'inherit') {
			self.zIndex = ni;
		} else {
			node.parents().each(function(i, n) {
				var z = $(n).css('z-index');
				if (z !== 'auto' && z !== 'inherit' && (z = parseInt(z))) {
					self.zIndex = z;
					return false;
				}
			});
		}
	},
	
	/**
	 * Load JavaScript files
	 * 
	 * @param  Array    urls      to load JavaScript file URLs
	 * @param  Function callback  call back function on script loaded
	 * @param  Object   opts      Additional options to $.ajax OR {loadType: 'tag'} to load by script tag
	 * @param  Object   check     { obj: (Object)ParentObject, name: (String)"Attribute name", timeout: (Integer)milliseconds }
	 * @return elFinder
	 */
	loadScript : function(urls, callback, opts, check) {
		var defOpts = {
				dataType : 'script',
				cache    : true
			},
			success = null,
			cnt, scripts = {};
		if ($.isFunction(callback)) {
			success = function(d, status) {
				if (!status || status === 'success' || status === 'notmodified') {
					if (check) {
						if (typeof check.obj[check.name] === 'undefined') {
							var cnt = check.timeout? (check.timeout / 10) : 1;
							var fi = setInterval(function() {
								if (--cnt < 0 || typeof check.obj[check.name] !== 'undefined') {
									clearInterval(fi);
									callback();
								}
							}, 10);
						} else {
							callback();
						}
					} else {
						callback();
					}
				} else {
					if (opts && opts.error && $.isFunction(opts.error)) {
						opts.error();
					}
				}
			}
		}
		if (opts && opts.loadType === 'tag') {
			$('head > script').each(function() {
				scripts[this.src] = this;
			});
			cnt = urls.length;
			$.each(urls, function(i, url) {
				var done = false,
					script;
				
				if (scripts[url]) {
					(--cnt < 1) && success(void(0), scripts[url]._error);
				} else {
					script = document.createElement('script');
					$('head').append(script);
					script.onload = script.onreadystatechange = function() {
						if ( !done && (!this.readyState ||
								this.readyState === 'loaded' || this.readyState === 'complete') ) {
							done = true;
							(--cnt < 1) && success();
						}
					};
					script.onerror = function(err) {
						script._error = (err && err.type)? err.type : 'error';
						(--cnt < 1) && success(void(0), script._error);
					}
					script.src = url;
				}
			});
		} else {
			opts = $.isPlainObject(opts)? Object.assign(defOpts, opts) : defOpts;
			(function appendScript() {
				$.ajax(Object.assign(opts, {
					url: urls.shift(),
					success: urls.length? appendScript : success
				}));
			})();
		}
		return this;
	},
	
	/**
	 * Load CSS files
	 * 
	 * @param  Array    to load CSS file URLs
	 * @return elFinder
	 */
	loadCss : function(urls) {
		var self = this;
		if (typeof urls === 'string') {
			urls = [ urls ];
		}
		$.each(urls, function(i, url) {
			url = self.convAbsUrl(url).replace(/^https?:/i, '');
			if (! $("head > link[href='+url+']").length) {
				$('head').append('<link rel="stylesheet" type="text/css" href="' + url + '" />');
			}
		});
		return this;
	},
	
	/**
	 * Abortable async job performer
	 * 
	 * @param func Function
	 * @param arr  Array
	 * @param opts Object
	 * 
	 * @return Object $.Deferred that has an extended method _abort()
	 */
	asyncJob : function(func, arr, opts) {
		var dfrd = $.Deferred().always(function() {
				dfrd._abort = function() {};
			}),
			abortFlg = false,
			parms = Object.assign({
				interval : 0,
				numPerOnce : 1
			}, opts || {}),
			resArr = [],
			vars =[],
			curVars = [],
			exec,
			tm;
		
		dfrd._abort = function(resolve) {
			tm && clearTimeout(tm);
			vars = [];
			abortFlg = true;
			if (dfrd.state() === 'pending') {
				dfrd[resolve? 'resolve' : 'reject'](resArr);
			}
		};
		if (typeof func === 'function' && Array.isArray(arr)) {
			vars = arr.concat();
			exec = function() {
				if (abortFlg) {
					return;
				}
				curVars = vars.splice(0, parms.numPerOnce);
				$.each(curVars, function(i, v) {
					if (abortFlg) {
						return false;
					}
					var res = func(v);
					(res !== null) && resArr.push(res);
				});
				if (abortFlg) {
					return;
				}
				if (vars.length) {
					tm = setTimeout(exec, parms.interval);
				} else {
					dfrd.resolve(resArr);
				}
			}
			if (vars.length) {
				tm = setTimeout(exec, 0);
				//exec();
			} else {
				dfrd.resolve(resArr);
			}
		} else {
			dfrd.reject();
		}
		return dfrd;
	},
	
	log : function(m) { window.console && window.console.log && window.console.log(m); return this; },
	
	debug : function(type, m) {
		var d = this.options.debug;

		if (d && (d === 'all' || d[type])) {
			window.console && window.console.log && window.console.log('elfinder debug: ['+type+'] ['+this.id+']', m);
		} 
		
		if (type === 'backend-error') {
			if (! this.cwd().hash || (d && (d === 'all' || d['backend-error']))) {
				m = Array.isArray(m)? m : [ m ];
				this.error(m);
			}
		} else if (type === 'backend-debug') {
			this.trigger('backenddebug', m);
		}
		
		return this;
	},
	time : function(l) { window.console && window.console.time && window.console.time(l); },
	timeEnd : function(l) { window.console && window.console.timeEnd && window.console.timeEnd(l); }
	

};

/**
 * for conpat ex. ie8...
 *
 * Object.keys() - JavaScript | MDN
 * https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
 */
if (!Object.keys) {
	Object.keys = (function () {
		var hasOwnProperty = Object.prototype.hasOwnProperty,
				hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
				dontEnums = [
					'toString',
					'toLocaleString',
					'valueOf',
					'hasOwnProperty',
					'isPrototypeOf',
					'propertyIsEnumerable',
					'constructor'
				],
				dontEnumsLength = dontEnums.length

		return function (obj) {
			if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object')

			var result = []

			for (var prop in obj) {
				if (hasOwnProperty.call(obj, prop)) result.push(prop)
			}

			if (hasDontEnumBug) {
				for (var i=0; i < dontEnumsLength; i++) {
					if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i])
				}
			}
			return result
		}
	})();
};
// Array.isArray
if (!Array.isArray) {
	Array.isArray = function(arr) {
		return jQuery.isArray(arr);
	};
}
// Object.assign
if (!Object.assign) {
	Object.assign = function() {
		return jQuery.extend.apply(null, arguments);
	};
}

