/**
 * @preserve Galleria v 1.2 2011-02-15
 * http://galleria.aino.se
 *
 * Copyright (c) 2011, Aino
 * Licensed under the MIT license.
 */

/*global jQuery, navigator, Galleria, Image */

(function( $ ) {

// some references
var undef,
	window = this,
	doc    = window.document,
	$doc   = $( doc ),

// internal constants
	DEBUG = false,
	NAV   = navigator.userAgent.toLowerCase(),
	HASH  = window.location.hash.replace(/#\//, ''),
	CLICK = function() {
		// use this to make touch devices snappier
		return Galleria.TOUCH ? 'touchstart' : 'click';
	},
	IE    = (function() {

		var v = 3,
			div = doc.createElement( 'div' ),
			all = div.getElementsByTagName( 'i' );

		do {
			div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->';
		} while ( all[0] );

		return v > 4 ? v : undef;

	}() ),
	DOM   = function() {
		return {
			html:  doc.documentElement,
			body:  doc.body,
			head:  doc.getElementsByTagName('head')[0],
			title: doc.title
		};
	},

	// list of Galleria events
	_eventlist = 'data ready thumbnail loadstart loadfinish image themeload play pause progress ' + 
			  'fullscreen_enter fullscreen_exit idle_enter idle_exit rescale ' +
			  'lightbox_open lightbox_close lightbox_image',

	_events = (function() {

		var evs = [];

		$.each( _eventlist.split(' '), function( i, ev ) {
			evs.push( ev );

			// legacy events
			if ( /_/.test( ev ) ) {
				evs.push( ev.replace( /_/g, '' ) );
			}
		});

		return evs;

	}()),

	// legacy options
	// allows the old my_setting syntax and converts it to camel case

	_legacyOptions = function( options ) {

		var n;

		if ( typeof options !== 'object' ) {

			// return whatever it was...
			return options;
		}

		$.each( options, function( key, value ) {
			if ( /^[a-z]+_/.test( key ) ) {
				n = '';
				$.each( key.split('_'), function( i, k ) {
					n += i > 0 ? k.substr( 0, 1 ).toUpperCase() + k.substr( 1 ) : k;
				});
				options[ n ] = value;
				delete options[ key ];
			}
		});

		return options;
	},

	_patchEvent = function( type ) {

		// allow 'image' instead of Galleria.IMAGE
		if ( $.inArray( type, _events ) > -1 ) {
			return Galleria[ type.toUpperCase() ];
		}

		return type;
	},

	// the internal timeouts object
	// provides helper methods for controlling timeouts
	_timeouts = {

		trunk: {},

		add: function( id, fn, delay, loop ) {
			loop = loop || false;
			this.clear( id );
			if ( loop ) {
				var old = fn;
				fn = function() {
					old();
					_timeouts.add( id, fn, delay );
				};
			}
			this.trunk[ id ] = window.setTimeout( fn, delay );
		},

		clear: function( id ) {

			var del = function( i ) {
				window.clearTimeout( this.trunk[ i ] );
				delete this.trunk[ i ];
			}, i;

			if ( !!id && id in this.trunk ) {
				del.call( _timeouts, id );

			} else if ( typeof id === 'undefined' ) {
				for ( i in this.trunk ) {
					if ( this.trunk.hasOwnProperty( i ) ) {
						del.call( _timeouts, i );
					}
				}
			}
		}
	},

	// the internal gallery holder
	_galleries = [],

	// the Utils singleton
	Utils = (function() {

		return {

			array : function( obj ) {
				return Array.prototype.slice.call(obj);
			},

			create : function( className, nodeName ) {
				nodeName = nodeName || 'div';
				var elem = doc.createElement( nodeName );
				elem.className = className;
				return elem;
			},

			forceStyles : function( elem, styles ) {
				elem = $(elem);
				if ( elem.attr( 'style' ) ) {
					elem.data( 'styles', elem.attr( 'style' ) ).removeAttr( 'style' );
				}
				elem.css( styles );
			},

			revertStyles : function() {
				$.each( Utils.array( arguments ), function( i, elem ) {

					elem = $( elem ).removeAttr( 'style' );

					if ( elem.data( 'styles' ) ) {
						elem.attr( 'style', elem.data('styles') ).data( 'styles', null );
					}
				});
			},

			moveOut : function( elem ) {
				Utils.forceStyles( elem, {
					position: 'absolute',
					left: -10000
				});
			},

			moveIn : function() {
				Utils.revertStyles.apply( Utils, Utils.array( arguments ) );
			},

			hide : function( elem, speed, callback ) {
				elem = $(elem);

				// save the value if not exist
				if (! elem.data('opacity') ) {
					elem.data('opacity', elem.css('opacity') );
				}

				// always hide
				var style = { opacity: 0 };

				if (speed) {
					elem.stop().animate( style, speed, callback );
				} else {
					elem.css( style );
				}
			},

			show : function( elem, speed, callback ) {
				elem = $(elem);

				// bring back saved opacity
				var saved = parseFloat( elem.data('opacity') ) || 1,
					style = { opacity: saved };

				// reset save if opacity === 1
				if (saved === 1) {
					elem.data('opacity', null);
				}

				// animate or toggle
				if (speed) {
					elem.stop().animate( style, speed, callback );
				} else {
					elem.css( style );
				}
			},

			addTimer : function() {
				_timeouts.add.apply( _timeouts, Utils.array( arguments ) );
				return this;
			},

			clearTimer : function() {
				_timeouts.clear.apply( _timeouts, Utils.array( arguments ) );
				return this;
			},

			wait : function(options) {
				options = $.extend({
					until : function() { return false; },
					success : function() {},
					error : function() { Galleria.raise('Could not complete wait function.'); },
					timeout: 3000
				}, options);

				var start = Utils.timestamp(),
					elapsed,
					now,
					fn = function() {
						now = Utils.timestamp();
						elapsed = now - start;
						if ( options.until( elapsed ) ) {
							options.success();
							return false;
						}

						if (now >= start + options.timeout) {
							options.error();
							return false;
						}
						window.setTimeout(fn, 2);
					};

				window.setTimeout(fn, 2);
			},

			toggleQuality : function( img, force ) {

				if ( IE !== 7 || IE !== 8  || !img ) {
					return;
				}

				if ( typeof force === 'undefined' ) {
					force = img.style.msInterpolationMode === 'nearest-neighbor';
				}

				img.style.msInterpolationMode = force ? 'bicubic' : 'nearest-neighbor';
			},

			insertStyleTag : function( styles ) {
				var style = doc.createElement( 'style' );
				DOM().head.appendChild( style );

				if ( style.styleSheet ) { // IE
					style.styleSheet.cssText = styles;
				} else {
					var cssText = doc.createTextNode( styles );
					style.appendChild( cssText );
				}
			},

			// a loadscript method that works for local scripts
			loadScript: function( url, callback ) {
				var done = false,
					script = $('<scr'+'ipt>').attr({
						src: url,
						async: true
					}).get(0);

			   // Attach handlers for all browsers
			   script.onload = script.onreadystatechange = function() {
				   if ( !done && (!this.readyState ||
					   this.readyState === 'loaded' || this.readyState === 'complete') ) {
					   done = true;

					   if (typeof callback === 'function') {
						   callback.call( this, this );
					   }

					   // Handle memory leak in IE
					   script.onload = script.onreadystatechange = null;
				   }
			   };

			   var s = doc.getElementsByTagName( 'script' )[0];
			   s.parentNode.insertBefore( script, s );
			},

			// parse anything into a number
			parseValue: function( val ) {
				if (typeof val === 'number') {
					return val;
				} else if (typeof val === 'string') {
					var arr = val.match(/\-?\d/g);
					return arr && arr.constructor === Array ? parseInt( arr.join(''), 10 ) : 0;
				} else {
					return 0;
				}
			},

			// timestamp abstraction
			timestamp: function() {
				return new Date().getTime();
			},

			// this is pretty crap, but works for now
			// it will add a callback, but it can't guarantee that the styles can be fetched
			// using getComputedStyle further checking needed, possibly a dummy element
			loadCSS : function( href, id, callback ) {

				var link,
					ready = false,
					length;

				// look for manual css
				$('link[rel=stylesheet]').each(function() {
					if ( new RegExp( href ).test( this.href ) ) {
						link = this;
						return false;
					}
				});

				if ( typeof id === 'function' ) {
					callback = id;
					id = undef;
				}

				callback = callback || function() {}; // dirty

				// if already present, return
				if ( link ) {
					callback.call( link, link );
					return link;
				}

				// save the length of stylesheets to check against
				length = doc.styleSheets.length;

				// add timestamp if DEBUG is true
				if ( DEBUG ) {
					href += '?' + Utils.timestamp();
				}

				// check for existing id
				if( $('#'+id).length ) {
					$('#'+id).attr('href', href);
					length--;
					ready = true;
				} else {
					link = $( '<link>' ).attr({
						rel: 'stylesheet',
						href: href,
						id: id
					}).get(0);

					window.setTimeout(function() {
						var styles = $('link[rel="stylesheet"], style');
						if ( styles.length ) {
							styles.get(0).parentNode.insertBefore( link, styles[0] );
						} else {
							DOM().head.appendChild( link );
						}

						if ( IE ) {
							link.attachEvent( 'onreadystatechange', function(e) {
								if( link.readyState === 'complete' ) {
									ready = true;
								}
							});
						} else {
							// what to do here? returning for now.
							ready = true;
						}
					}, 10);
				}

				if ( typeof callback === 'function' ) {

					Utils.wait({
						until: function() {
							return ready && doc.styleSheets.length > length;
						},
						success: function() {
							Utils.addTimer( 'css', function() {
								callback.call( link, link );
							}, 100);
						},
						error: function() {
							Galleria.raise( 'Theme CSS could not load' );
						},
						timeout: 1000
					});
				}
				return link;
			}
		};
	}()),

	// the transitions holder
	_transitions = {

		fade: function(params, complete) {
			$(params.next).css('opacity', 0).show().animate({
				opacity: 1
			}, params.speed, complete);

			if (params.prev) {
				$(params.prev).css('opacity', 1).show().animate({
					opacity: 0
				}, params.speed);
			}
		},

		flash: function(params, complete) {
			$(params.next).css('opacity', 0);
			if (params.prev) {
				$(params.prev).animate({
					opacity: 0
				}, (params.speed / 2), function() {
					$(params.next).animate({
						opacity: 1
					}, params.speed, complete);
				});
			} else {
				$(params.next).animate({
					opacity: 1
				}, params.speed, complete);
			}
		},

		pulse: function(params, complete) {
			if (params.prev) {
				$(params.prev).hide();
			}
			$(params.next).css('opacity', 0).animate({
				opacity:1
			}, params.speed, complete);
		},

		slide: function(params, complete) {
			var image  = $(params.next).parent(),
				images = this.$('images'), // ??
				width  = this._stageWidth,
				easing = this.getOptions( 'easing' );

			image.css({
				left: width * ( params.rewind ? -1 : 1 )
			});
			images.animate({
				left: width * ( params.rewind ? 1 : -1 )
			}, {
				duration: params.speed,
				queue: false,
				easing: easing,
				complete: function() {
					images.css('left', 0);
					image.css('left', 0);
					complete();
				}
			});
		},

		fadeslide: function(params, complete) {

			var x = 0,
				easing = this.getOptions('easing'),
				distance = this.getStageWidth();

			if (params.prev) {
				x = Utils.parseValue( $(params.prev).css('left') );
				$(params.prev).css({
					opacity: 1,
					left: x
				}).animate({
					opacity: 0,
					left: x + ( distance * ( params.rewind ? 1 : -1 ) )
				},{
					duration: params.speed,
					queue: false,
					easing: easing
				});
			}

			x = Utils.parseValue( $(params.next).css('left') );

			$(params.next).css({
				left: x + ( distance * ( params.rewind ? -1 : 1 ) ),
				opacity: 0
			}).animate({
				opacity: 1,
				left: x
			}, {
				duration: params.speed,
				complete: complete,
				queue: false,
				easing: easing
			});
		}
	};

/**
	The main Galleria class

	@class
	@constructor

	@example var gallery = new Galleria();

	@author http://aino.se

	@requires jQuery

*/

var Galleria = function() {

	var self = this;

	// the theme used
	this._theme = undef;

	// internal options
	this._options = {};

	// flag for controlling play/pause
	this._playing = false;

	// internal interval for slideshow
	this._playtime = 5000;

	// internal variable for the currently active image
	this._active = null;

	// the internal queue, arrayified
	this._queue = { length: 0 };

	// the internal data array
	this._data = [];

	// the internal dom collection
	this._dom = {};

	// the internal thumbnails array
	this._thumbnails = [];

	// internal init flag
	this._initialized = false;

	// global stagewidth/height
	this._stageWidth = 0;
	this._stageHeight = 0;

	// target holder
	this._target = undef;

	// instance id
	this._id = Math.random();

	// add some elements
	var divs =  'container stage images image-nav image-nav-left image-nav-right ' +
				'info info-text info-title info-description info-author ' +
				'thumbnails thumbnails-list thumbnails-container thumb-nav-left thumb-nav-right ' +
				'loader counter tooltip',
		spans = 'current total';

	$.each( divs.split(' '), function( i, elemId ) {
		self._dom[ elemId ] = Utils.create( 'galleria-' + elemId );
	});

	$.each( spans.split(' '), function( i, elemId ) {
		self._dom[ elemId ] = Utils.create( 'galleria-' + elemId, 'span' );
	});

	// the internal keyboard object
	// keeps reference of the keybinds and provides helper methods for binding keys
	var keyboard = this._keyboard = {

		keys : {
			'UP': 38,
			'DOWN': 40,
			'LEFT': 37,
			'RIGHT': 39,
			'RETURN': 13,
			'ESCAPE': 27,
			'BACKSPACE': 8,
			'SPACE': 32
		},

		map : {},

		bound: false,

		press: function(e) {
			var key = e.keyCode || e.which;
			if ( key in keyboard.map && typeof keyboard.map[key] === 'function' ) {
				keyboard.map[key].call(self, e);
			}
		},

		attach: function(map) {

			var key, up;

			for( key in map ) {
				if ( map.hasOwnProperty( key ) ) {
					up = key.toUpperCase();
					if ( up in keyboard.keys ) {
						keyboard.map[ keyboard.keys[up] ] = map[key];
					}
				}
			}
			if ( !keyboard.bound ) {
				keyboard.bound = true;
				$doc.bind('keydown', keyboard.press);
			}
		},

		detach: function() {
			keyboard.bound = false;
			$doc.unbind('keydown', keyboard.press);
		}
	};

	// internal controls for keeping track of active / inactive images
	var controls = this._controls = {

		0: undef,

		1: undef,

		active : 0,

		swap : function() {
			controls.active = controls.active ? 0 : 1;
		},

		getActive : function() {
			return controls[ controls.active ];
		},

		getNext : function() {
			return controls[ 1 - controls.active ];
		}
	};

	// internal carousel object
	var carousel = this._carousel = {

		// shortcuts
		next: self.$('thumb-nav-right'),
		prev: self.$('thumb-nav-left'),

		// cache the width
		width: 0,

		// track the current position
		current: 0,

		// cache max value
		max: 0,

		// save all hooks for each width in an array
		hooks: [],

		// update the carousel
		// you can run this method anytime, f.ex on window.resize
		update: function() {
			var w = 0,
				h = 0,
				hooks = [0];

			$.each( self._thumbnails, function( i, thumb ) {
				if ( thumb.ready ) {
					w += thumb.outerWidth || $( thumb.container ).outerWidth( true );
					hooks[ i+1 ] = w;
					h = Math.max( h, thumb.outerHeight || $( thumb.container).outerHeight( true ) );
				}
			});

			self.$( 'thumbnails' ).css({
				width: w,
				height: h
			});

			carousel.max = w;
			carousel.hooks = hooks;
			carousel.width = self.$( 'thumbnails-list' ).width();
			carousel.setClasses();

			self.$( 'thumbnails-container' ).toggleClass( 'galleria-carousel', w > carousel.width );

			// todo: fix so the carousel moves to the left
		},

		bindControls: function() {

			var i;

			carousel.next.bind( CLICK(), function(e) {
				e.preventDefault();

				if ( self._options.carouselSteps === 'auto' ) {

					for ( i = carousel.current; i < carousel.hooks.length; i++ ) {
						if ( carousel.hooks[i] - carousel.hooks[ carousel.current ] > carousel.width ) {
							carousel.set(i - 2);
							break;
						}
					}

				} else {
					carousel.set( carousel.current + self._options.carouselSteps);
				}
			});

			carousel.prev.bind( CLICK(), function(e) {
				e.preventDefault();

				if ( self._options.carouselSteps === 'auto' ) {

					for ( i = carousel.current; i >= 0; i-- ) {
						if ( carousel.hooks[ carousel.current ] - carousel.hooks[i] > carousel.width ) {
							carousel.set( i + 2 );
							break;
						} else if ( i === 0 ) {
							carousel.set( 0 );
							break;
						}
					}
				} else {
					carousel.set( carousel.current - self._options.carouselSteps );
				}
			});
		},

		// calculate and set positions
		set: function( i ) {
			i = Math.max( i, 0 );
			while ( carousel.hooks[i - 1] + carousel.width >= carousel.max && i >= 0 ) {
				i--;
			}
			carousel.current = i;
			carousel.animate();
		},

		// get the last position
		getLast: function(i) {
			return ( i || carousel.current ) - 1;
		},

		// follow the active image
		follow: function(i) {

			//don't follow if position fits
			if ( i === 0 || i === carousel.hooks.length - 2 ) {
				carousel.set( i );
				return;
			}

			// calculate last position
			var last = carousel.current;
			while( carousel.hooks[last] - carousel.hooks[ carousel.current ] <
				   carousel.width && last <= carousel.hooks.length ) {
				last ++;
			}

			// set position
			if ( i - 1 < carousel.current ) {
				carousel.set( i - 1 );
			} else if ( i + 2 > last) {
				carousel.set( i - last + carousel.current + 2 );
			}
		},

		// helper for setting disabled classes
		setClasses: function() {
			carousel.prev.toggleClass( 'disabled', !carousel.current );
			carousel.next.toggleClass( 'disabled', carousel.hooks[ carousel.current ] + carousel.width >= carousel.max );
		},

		// the animation method
		animate: function(to) {
			carousel.setClasses();
			var num = carousel.hooks[ carousel.current ] * -1;

			if ( isNaN( num ) ) {
				return;
			}

			self.$( 'thumbnails' ).animate({
				left: num
			},{
				duration: self._options.carouselSpeed,
				easing: self._options.easing,
				queue: false
			});
		}
	};

	// tooltip control
	// added in 1.2
	var tooltip = this._tooltip = {

		initialized : false,

		open: false,

		init: function() {

			tooltip.initialized = true;

			var css = '.galleria-tooltip{padding:3px 8px;max-width:50%;background:#ffe;color:#000;z-index:3;position:absolute;font-size:11px;line-height:1.3' +
					  'opacity:0;box-shadow:0 0 2px rgba(0,0,0,.4);-moz-box-shadow:0 0 2px rgba(0,0,0,.4);-webkit-box-shadow:0 0 2px rgba(0,0,0,.4);}';

			Utils.insertStyleTag(css);

			self.$( 'tooltip' ).css('opacity', 0.8);
			Utils.hide( self.get('tooltip') );

		},

		// move handler
		move: function( e ) {
			var mouseX = self.getMousePosition(e).x,
				mouseY = self.getMousePosition(e).y,
				$elem = self.$( 'tooltip' ),
				x = mouseX,
				y = mouseY,
				height = $elem.outerHeight( true ) + 1,
				width = $elem.outerWidth( true ),
				limitY = height + 15;

			var maxX = self.$( 'container').width() - width - 2,
				maxY = self.$( 'container').height() - height - 2;

			if ( !isNaN(x) && !isNaN(y) ) {

				x += 10;
				y -= 30;

				x = Math.max( 0, Math.min( maxX, x ) );
				y = Math.max( 0, Math.min( maxY, y ) );

				if( mouseY < limitY ) {
					y = limitY;
				}

				$elem.css({ left: x, top: y });
			}
		},

		// bind elements to the tooltip
		// you can bind multiple elementIDs using { elemID : function } or { elemID : string }
		// you can also bind single DOM elements using bind(elem, string)
		bind: function( elem, value ) {

			if (! tooltip.initialized ) {
				tooltip.init();
			}

			var hover = function( elem, value) {

				tooltip.define( elem, value );

				$( elem ).hover(function() {

					Utils.clearTimer('switch_tooltip');
					self.$('container').unbind( 'mousemove', tooltip.move ).bind( 'mousemove', tooltip.move ).trigger( 'mousemove' );
					tooltip.show( elem );

					Galleria.utils.addTimer( 'tooltip', function() {
						self.$( 'tooltip' ).stop();
						Utils.show( self.get( 'tooltip' ), 400 );
						tooltip.open = true;

					}, tooltip.open ? 0 : 1000);

				}, function() {

					self.$( 'container' ).unbind( 'mousemove', tooltip.move );
					Utils.clearTimer( 'tooltip' );

					self.$( 'tooltip' ).stop();

					Utils.hide( self.get( 'tooltip' ), 200, function() {
						Utils.addTimer('switch_tooltip', function() {
							tooltip.open = false;
						}, 1000);
					});
				});
			};

			if ( typeof value === 'string' ) {
				hover( ( elem in self._dom ? self.get( elem ) : elem ), value );
			} else {
				// asume elemID here
				$.each( elem, function( elemID, val ) {
					hover( self.get(elemID), val );
				});
			}
		},

		show: function( elem ) {

			elem = $( elem in self._dom ? self.get(elem) : elem );

			var text = elem.data( 'tt' ),
				mouseup = function( e ) {

					// attach a tiny settimeout to make sure the new tooltip is filled
					window.setTimeout( (function( ev ) {
						return function() {
							tooltip.move( ev );
						};
					}( e )), 10);

					elem.unbind( 'mouseup', mouseup );

				};

			text = typeof text === 'function' ? text() : text;

			if ( ! text ) {
				return;
			}

			self.$( 'tooltip' ).html( text.replace(/\s/, '&nbsp;') );

			// trigger mousemove on mouseup in case of click
			elem.bind( 'mouseup', mouseup );
		},

		define: function( elem, value ) {

			// we store functions, not strings
			if (typeof value !== 'function') {
				var s = value;
				value = function() {
					return s;
				};
			}

			elem = $( elem in self._dom ? self.get(elem) : elem ).data('tt', value);

			tooltip.show( elem );

		}
	};

	// internal fullscreen control
	// added in 1.195
	// still kind of experimental
	var fullscreen = this._fullscreen = {
		scrolled: 0,
		active: false,
		enter: function(callback) {

			fullscreen.active = true;

			// hide the image until rescale is complete
			Utils.hide( self.getActiveImage() );

			self.$( 'container' ).addClass( 'fullscreen' );

			fullscreen.scrolled = $(window).scrollTop();

			// begin styleforce
			Utils.forceStyles(self.get('container'), {
				position: 'fixed',
				top: 0,
				left: 0,
				width: '100%',
				height: '100%',
				zIndex: 10000
			});

			var htmlbody = {
				height: '100%',
				overflow: 'hidden',
				margin:0,
				padding:0
			};

			Utils.forceStyles( DOM().html, htmlbody );
			Utils.forceStyles( DOM().body, htmlbody );

			// attach some keys
			self.attachKeyboard({
				escape: self.exitFullscreen,
				right: self.next,
				left: self.prev
			});

			// init the first rescale and attach callbacks
			self.rescale(function() {

				Utils.addTimer('fullscreen_enter', function() {
					// show the image after 50 ms
					Utils.show( self.getActiveImage() );

					if (typeof callback === 'function') {
						callback.call( self );
					}

				}, 100);

				self.trigger( Galleria.FULLSCREEN_ENTER );
			});

			// bind the scaling to the resize event
			$(window).resize( function() {
				fullscreen.scale();
			} );
		},

		scale : function() {
			self.rescale();
		},

		exit: function(callback) {

			fullscreen.active = false;

			Utils.hide( self.getActiveImage() );

			self.$('container').removeClass( 'fullscreen' );

			// revert all styles
			Utils.revertStyles( self.get('container'), DOM().html, DOM().body );

			// scroll back
			window.scrollTo(0, fullscreen.scrolled);

			// detach all keyboard events (is this good?)
			self.detachKeyboard();

			self.rescale(function() {
				Utils.addTimer('fullscreen_exit', function() {

					// show the image after 50 ms
					Utils.show( self.getActiveImage() );

					if ( typeof callback === 'function' ) {
						callback.call( self );
					}

				}, 50);

				self.trigger( Galleria.FULLSCREEN_EXIT );
			});

			$(window).unbind('resize', fullscreen.scale);
		}
	};

	// the internal idle object for controlling idle states
	var idle = this._idle = {

		trunk: [],

		bound: false,

		add: function(elem, to) {
			if (!elem) {
				return;
			}
			if (!idle.bound) {
				idle.addEvent();
			}
			elem = $(elem);

			var from = {},
				style;

			for ( style in to ) {
				if ( to.hasOwnProperty( style ) ) {
					from[ style ] = elem.css( style );
				}
			}
			elem.data('idle', {
				from: from,
				to: to,
				complete: true,
				busy: false
			});
			idle.addTimer();
			idle.trunk.push(elem);
		},

		remove: function(elem) {

			elem = jQuery(elem);

			$.each(idle.trunk, function(i, el) {
				if ( el.length && !el.not(elem).length ) {
					self._idle.show(elem);
					self._idle.trunk.splice(i, 1);
				}
			});

			if (!idle.trunk.length) {
				idle.removeEvent();
				Utils.clearTimer('idle');
			}
		},

		addEvent : function() {
			idle.bound = true;
			self.$('container').bind('mousemove click', idle.showAll );
		},

		removeEvent : function() {
			idle.bound = false;
			self.$('container').unbind('mousemove click', idle.showAll );
		},

		addTimer : function() {
			Utils.addTimer('idle', function() {
				self._idle.hide();
			}, self._options.idleTime );
		},

		hide : function() {
			self.trigger( Galleria.IDLE_ENTER );

			$.each( idle.trunk, function(i, elem) {

				var data = elem.data('idle');

				if (! data) {
					return;
				}

				elem.data('idle').complete = false;

				elem.stop().animate(data.to, {
					duration: self._options.idleSpeed,
					queue: false,
					easing: 'swing'
				});
			});
		},

		showAll : function() {

			Utils.clearTimer('idle');

			$.each(self._idle.trunk, function( i, elem ) {
				self._idle.show( elem );
			});
		},

		show: function(elem) {

			var data = elem.data('idle');

			if (!data.busy && !data.complete) {

				data.busy = true;

				self.trigger( Galleria.IDLE_EXIT );

				Utils.clearTimer( 'idle' );

				elem.stop().animate(data.from, {
					duration: self._options.idleSpeed/2,
					queue: false,
					easing: 'swing',
					complete: function() {
						$(this).data('idle').busy = false;
						$(this).data('idle').complete = true;
					}
				});
			}
			idle.addTimer();
		}
	};

	// internal lightbox object
	// creates a predesigned lightbox for simple popups of images in galleria
	var lightbox = this._lightbox = {

		width : 0,

		height : 0,

		initialized : false,

		active : null,

		image : null,

		elems : {},

		init : function() {

			// trigger the event
			self.trigger( Galleria.LIGHTBOX_OPEN );

			if ( lightbox.initialized ) {
				return;
			}
			lightbox.initialized = true;

			// create some elements to work with
			var elems = 'overlay box content shadow title info close prevholder prev nextholder next counter image',
				el = {},
				op = self._options,
				css = '',
				abs = 'position:absolute;',
				prefix = 'lightbox-',
				cssMap = {
					overlay:    'position:fixed;display:none;opacity:'+op.overlayOpacity+';filter:alpha(opacity='+(op.overlayOpacity*100)+
								');top:0;left:0;width:100%;height:100%;background:'+op.overlayBackground+';z-index:99990',
					box:        'position:fixed;display:none;width:400px;height:400px;top:50%;left:50%;margin-top:-200px;margin-left:-200px;z-index:99991',
					shadow:     abs+'background:#000;width:100%;height:100%;',
					content:    abs+'background-color:#fff;top:10px;left:10px;right:10px;bottom:10px;overflow:hidden',
					info:       abs+'bottom:10px;left:10px;right:10px;color:#444;font:11px/13px arial,sans-serif;height:13px',
					close:      abs+'top:10px;right:10px;height:20px;width:20px;background:#fff;text-align:center;cursor:pointer;color:#444;font:16px/22px arial,sans-serif;z-index:99999',
					image:      abs+'top:10px;left:10px;right:10px;bottom:30px;overflow:hidden;display:block;',
					prevholder: abs+'width:50%;top:0;bottom:40px;cursor:pointer;',
					nextholder: abs+'width:50%;top:0;bottom:40px;right:-1px;cursor:pointer;',
					prev:       abs+'top:50%;margin-top:-20px;height:40px;width:30px;background:#fff;left:20px;display:none;line-height:40px;text-align:center;color:#000',
					next:       abs+'top:50%;margin-top:-20px;height:40px;width:30px;background:#fff;right:20px;left:auto;display:none;line-height:40px;text-align:center;color:#000',
					title:      'float:left',
					counter:    'float:right;margin-left:8px;'
				},
				hover = function(elem) {
					return elem.hover(
						function() { $(this).css( 'color', '#bbb' ); },
						function() { $(this).css( 'color', '#444' ); }
					);
				},
				appends = {};

			// IE8 fix for IE's transparent background event "feature"
			if ( IE === 8 ) {
				cssMap.nextholder += 'background:#000;filter:alpha(opacity=0);';
				cssMap.prevholder += 'background:#000;filter:alpha(opacity=0);';
			}

			// create and insert CSS
			$.each(cssMap, function( key, value ) {
				css += '.galleria-'+prefix+key+'{'+value+'}';
			});

			Utils.insertStyleTag( css );

			// create the elements
			$.each(elems.split(' '), function( i, elemId ) {
				self.addElement( 'lightbox-' + elemId );
				el[ elemId ] = lightbox.elems[ elemId ] = self.get( 'lightbox-' + elemId );
			});

			// initiate the image
			lightbox.image = new Galleria.Picture();

			// append the elements
			$.each({
					box: 'shadow content close prevholder nextholder',
					info: 'title counter',
					content: 'info image',
					prevholder: 'prev',
					nextholder: 'next'
				}, function( key, val ) {
					var arr = [];
					$.each( val.split(' '), function( i, prop ) {
						arr.push( prefix + prop );
					});
					appends[ prefix+key ] = arr;
			});

			self.append( appends );

			$( el.image ).append( lightbox.image.container );

			$( DOM().body ).append( el.overlay, el.box );

			// add the prev/next nav and bind some controls

			hover( $( el.close ).bind( CLICK(), lightbox.hide ).html('&#215;') );

			$.each( ['Prev','Next'], function(i, dir) {

				var $d = $( el[ dir.toLowerCase() ] ).html( /v/.test( dir ) ? '&#8249;&nbsp;' : '&nbsp;&#8250;' ),
					$e = $( el[ dir.toLowerCase()+'holder'] );

				$e.bind( CLICK(), function() {
					lightbox[ 'show' + dir ]();
				});

				// IE7 will simply show the nav
				if ( IE < 8 ) {
					$d.show();
					return;
				}

				$e.hover( function() {
					$d.show();
				}, function(e) {
					$d.stop().fadeOut( 200 );
				});

			});
			$( el.overlay ).bind( CLICK(), lightbox.hide );

		},

		rescale: function(event) {

			// calculate
			 var width = Math.min( $(window).width()-40, lightbox.width ),
				height = Math.min( $(window).height()-60, lightbox.height ),
				ratio = Math.min( width / lightbox.width, height / lightbox.height ),
				destWidth = ( lightbox.width * ratio ) + 40,
				destHeight = ( lightbox.height * ratio ) + 60,
				to = {
					width: destWidth,
					height: destHeight,
					marginTop: Math.ceil( destHeight / 2 ) *- 1,
					marginLeft: Math.ceil( destWidth / 2 ) *- 1
				};

			// if rescale event, don't animate
			if ( event ) {
				$( lightbox.elems.box ).css( to );
			} else {
				$( lightbox.elems.box ).animate(
					to,
					self._options.lightboxTransitionSpeed,
					self._options.easing,
					function() {
						var image = lightbox.image,
							speed = self._options.lightboxFadeSpeed;

						self.trigger({
							type: Galleria.LIGHTBOX_IMAGE,
							imageTarget: image.image
						});

						image.show();
						Utils.show( image.image, speed );
						Utils.show( lightbox.elems.info, speed );
					}
				);
			}
		},

		hide: function() {

			// remove the image
			lightbox.image.image = null;

			$(window).unbind('resize', lightbox.rescale);

			$( lightbox.elems.box ).hide();

			Utils.hide( lightbox.elems.info );

			Utils.hide( lightbox.elems.overlay, 200, function() {
				$( this ).hide().css( 'opacity', self._options.overlayOpacity );
				self.trigger( Galleria.LIGHTBOX_CLOSE );
			});
		},

		showNext: function() {
			lightbox.show( self.getNext( lightbox.active ) );
		},

		showPrev: function() {
			lightbox.show( self.getPrev( lightbox.active ) );
		},

		show: function(index) {

			lightbox.active = index = typeof index === 'number' ? index : self.getIndex();

			if ( !lightbox.initialized ) {
				lightbox.init();
			}

			$(window).unbind('resize', lightbox.rescale );

			var data = self.getData(index),
				total = self.getDataLength();

			Utils.hide( lightbox.elems.info );

			lightbox.image.load( data.image, function( image ) {

				lightbox.width = image.original.width;
				lightbox.height = image.original.height;

				$( image.image ).css({
					width: '100.5%',
					height: '100.5%',
					top: 0,
					zIndex: 99998,
					opacity: 0
				});

				lightbox.elems.title.innerHTML = data.title;
				lightbox.elems.counter.innerHTML = (index + 1) + ' / ' + total;
				$(window).resize( lightbox.rescale );
				lightbox.rescale();
			});

			$( lightbox.elems.overlay ).show();
			$( lightbox.elems.box ).show();
		}
	};

	return this;
};

// end Galleria constructor

Galleria.prototype = {

	// bring back the constructor reference

	constructor: Galleria,

	/**
		Use this function to initialize the gallery and start loading.
		Should only be called once per instance.

		@param {HTMLElement} target The target element
		@param {Object} options The gallery options

		@returns Instance
	*/

	init: function( target, options ) {

		var self = this;

		options = _legacyOptions( options );

		// save the instance
		_galleries.push( this );

		// save the original ingredients
		this._original = {
			target: target,
			options: options,
			data: null
		};

		// save the target here
		this._target = this._dom.target = target.nodeName ? target : $( target ).get(0);

		// raise error if no target is detected
		if ( !this._target ) {
			 Galleria.raise('Target not found.');
			 return;
		}

		// apply options
		this._options = {
			autoplay: false,
			carousel: true,
			carouselFollow: true,
			carouselSpeed: 400,
			carouselSteps: 'auto',
			clicknext: false,
			dataConfig : function( elem ) { return {}; },
			dataSelector: 'img',
			dataSource: this._target,
			debug: undef,
			easing: 'galleria',
			extend: function(options) {},
			height: 'auto',
			idleTime: 3000,
			idleSpeed: 200,
			imageCrop: false,
			imageMargin: 0,
			imagePan: false,
			imagePanSmoothness: 12,
			imagePosition: '50%',
			keepSource: false,
			lightboxFadeSpeed: 200,
			lightboxTransition_speed: 500,
			linkSourceTmages: true,
			maxScaleRatio: undef,
			minScaleRatio: undef,
			overlayOpacity: 0.85,
			overlayBackground: '#0b0b0b',
			pauseOnInteraction: true,
			popupLinks: false,
			preload: 2,
			queue: true,
			show: 0,
			showInfo: true,
			showCounter: true,
			showImagenav: true,
			thumbCrop: true,
			thumbEventType: CLICK(),
			thumbFit: true,
			thumbMargin: 0,
			thumbQuality: 'auto',
			thumbnails: true,
			transition: 'fade',
			transitionInitial: undef,
			transitionSpeed: 400,
			width: 'auto'
		};

		// apply debug
		if ( options && options.debug === true ) {
			DEBUG = true;
		}

		// hide all content
		$( this._target ).children().hide();

		// now we just have to wait for the theme...
		if ( Galleria.theme ) {
			this._init();
		} else {
			Utils.addTimer('themeload', function() {
				Galleria.raise( 'No theme found.', true);
			}, 2000);

			$doc.one( Galleria.THEMELOAD, function() {
				Utils.clearTimer( 'themeload' );
				self._init.call( self );
			});
		}
	},

	// the internal _init is called when the THEMELOAD event is triggered
	// this method should only be called once per instance
	// for manipulation of data, use the .load method

	_init: function() {
		var self = this;

		if ( this._initialized ) {
			Galleria.raise( 'Init failed: Gallery instance already initialized.' );
			return this;
		}

		this._initialized = true;

		if ( !Galleria.theme ) {
			Galleria.raise( 'Init failed: No theme found.' );
			return this;
		}

		// merge the theme & caller options
		$.extend( true, this._options, Galleria.theme.defaults, this._original.options );

		// bind the gallery to run when data is ready
		this.bind( Galleria.DATA, function() {

			// save the new data
			this._original.data = this._data;

			// lets show the counter here
			this.get('total').innerHTML = this.getDataLength();

			// cache the container
			var $container = this.$( 'container' );

			// the gallery is ready, let's just wait for the css
			var num = { width: 0, height: 0 };
			var testElem =  Utils.create('galleria-image');

			// check container and thumbnail height
			Utils.wait({
				until: function() {

					// keep trying to get the value
					$.each(['width', 'height'], function( i, m ) {

						// first check if options is set

						if ( self._options[ m ] && typeof self._options[ m ] === 'number' ) {
							num[ m ] = self._options[ m ];
						} else {

							// else extract the measures in the following order:

							num[m] = Utils.parseValue( $container.css( m ) ) ||         // 1. the container css
									 Utils.parseValue( self.$( 'target' ).css( m ) ) || // 2. the target css
									 $container[ m ]() ||                               // 3. the container jQuery method
									 self.$( 'target' )[ m ]();                         // 4. the container jQuery method
						}

					});

					var thumbHeight = function() {
						return true;
					};

					// make sure thumbnails have a height as well
					if ( self._options.thumbnails ) {
						self.$('thumbnails').append( testElem );
						thumbHeight = function() {
							return !!$( testElem ).height();
						};
					}

					return thumbHeight() && num.width && num.height > 50;

				},
				success: function() {

					// remove the testElem
					$( testElem ).remove();

					// apply the new measures
					$container.width( num.width );
					$container.height( num.height );

					// for some strange reason, webkit needs a single setTimeout to play ball
					if ( Galleria.WEBKIT ) {
						window.setTimeout( function() {
							self._run();
						}, 1);
					} else {
						self._run();
					}
				},
				error: function() {
					// Height was probably not set, raise a hard error
					Galleria.raise('Width & Height not found.', true);
				},
				timeout: 2000
			});
		});

		// postrun some stuff after the gallery is ready
		// make sure it only runs once
		var one = false;

		this.bind( Galleria.READY, (function(one) {

			return function() {

				// show counter
				Utils.show( this.$('counter') );

				// bind carousel nav
				if ( this._options.carousel ) {
					this._carousel.bindControls();
				}

				// start autoplay
				if ( this._options.autoplay ) {

					this.pause();

					if ( typeof this._options.autoplay === 'number' ) {
						this._playtime = this._options.autoplay;
					}

					this.trigger( Galleria.PLAY );
					this._playing = true;
				}

				// if second load, just do the show and return
				if ( one ) {
					if ( typeof this._options.show === 'number' ) {
						this.show( this._options.show );
					}
					return;
				}

				one = true;

				// bind clicknext
				if ( this._options.clicknext ) {
					$.each( this._data, function( i, data ) {
						delete data.link;
					});
					this.$( 'stage' ).css({ cursor : 'pointer' }).bind( CLICK(), function(e) {
						self.next();
					});
				}

				// initialize the History plugin
				if ( Galleria.History ) {

					// bind the show method
					Galleria.History.change(function(e) {

						// grab history ID
						var val = parseInt( e.value.replace( /\//, '' ), 10 );

						// if ID is NaN, the user pressed back from the first image
						// return to previous address
						if (isNaN(val)) {
							window.history.go(-1);

						// else show the image
						} else {
							self.show( val, undef, true );
						}
					});
				}

				// call the theme init method
				Galleria.theme.init.call( this, this._options );

				// call the extend option
				this._options.extend.call( this, this._options );

				// show the initial image
				// first test for permalinks in history
				if ( /^[0-9]{1,4}$/.test( HASH ) && Galleria.History ) {
					this.show( HASH, undef, true );

				} else {
					this.show( this._options.show );
				}
			};
		}( one )));

		// build the gallery frame
		this.append({
			'info-text' :
				['info-title', 'info-description', 'info-author'],
			'info' :
				['info-text'],
			'image-nav' :
				['image-nav-right', 'image-nav-left'],
			'stage' :
				['images', 'loader', 'counter', 'image-nav'],
			'thumbnails-list' :
				['thumbnails'],
			'thumbnails-container' :
				['thumb-nav-left', 'thumbnails-list', 'thumb-nav-right'],
			'container' :
				['stage', 'thumbnails-container', 'info', 'tooltip']
		});

		Utils.hide( this.$( 'counter' ).append(
			this.get( 'current' ),
			' / ',
			this.get( 'total' )
		) );

		this.setCounter('&#8211;');

		// add images to the controls
		$.each( new Array(2), function(i) {

			// create a new Picture instance
			var image = new Galleria.Picture();

			// apply some styles
			$( image.container ).css({
				position: 'absolute',
				top: 0,
				left: 0
			});

			// append the image
			self.$( 'images' ).append( image.container );

			// reload the controls
			self._controls[i] = image;

		});

		// some forced generic styling
		this.$( 'images' ).css({
			position: 'relative',
			top: 0,
			left: 0,
			width: '100%',
			height: '100%'
		});

		this.$( 'thumbnails, thumbnails-list' ).css({
			overflow: 'hidden',
			position: 'relative'
		});

		// bind image navigation arrows
		this.$( 'image-nav-right, image-nav-left' ).bind( CLICK(), function(e) {

			// tune the clicknext option
			if ( self._options.clicknext ) {
				e.stopPropagation();
			}

			// pause if options is set
			if ( self._options.pause_on_interaction ) {
				self.pause();
			}

			// navigate
			var fn = /right/.test( this.className ) ? 'next' : 'prev';
			self[ fn ]();

		});

		// hide controls if chosen to
		$.each( ['info','counter','image-nav'], function( i, el ) {
			if ( self._options[ 'show_' + el.replace(/-/, '') ] === false ) {
				Utils.moveOut( self.get( el ) );
			}
		});

		// load up target content
		this.load();

		// now it's usually safe to remove the content
		// IE will never stop loading if we remove it, so let's keep it hidden for IE (it's usually fast enough anyway)
		if ( !this._options.keep_source && !IE ) {
			this._target.innerHTML = '';
		}

		// append the gallery frame
		this.$( 'target' ).append( this.get( 'container' ) );

		// parse the carousel on each thumb load
		if ( this._options.carousel ) {
			this.bind( Galleria.THUMBNAIL, function() {
				this.updateCarousel();
			});
		}

		return this;
	},

	// Creates the thumbnails and carousel
	// can be used at any time, f.ex when the data object is manipulated

	_createThumbnails : function() {

		var i,
			src,
			thumb,
			data,

			$container,

			self = this,
			o = this._options,

			// get previously active thumbnail, if exists
			active = (function() {
				var a = self.$('thumbnails').find('.active');
				if ( !a.length ) {
					return false;
				}
				return a.find('img').attr('src');
			}()),

			// cache the thumbnail option
			optval = typeof o.thumbnails === 'string' ? o.thumbnails.toLowerCase() : null,

			// move some data into the instance
			// for some reason, jQuery cant handle css(property) when zooming in FF, breaking the gallery
			// so we resort to getComputedStyle for browsers who support it
			getStyle = function( prop ) {
				return doc.defaultView && doc.defaultView.getComputedStyle ?
					doc.defaultView.getComputedStyle( thumb.container, null )[ prop ] :
					$container.css( prop );
			},

			fake = function(image, index, container) {
				return function() {
					$( container ).append( image );
					self.trigger({
						type: Galleria.THUMBNAIL,
						thumbTarget: image,
						index: index
					});
				};
			},

			onThumbEvent = function( e ) {

				// pause if option is set
				if ( o.pauseOnInteraction ) {
					self.pause();
				}

				// extract the index from the data
				var index = $( e.currentTarget ).data( 'index' );
				if ( self.getIndex() !== index ) {
					self.show( index );
				}

				e.preventDefault();
			},

			onThumbLoad = function( thumb ) {

				// scale when ready
				thumb.scale({
					width:    thumb.data.width,
					height:   thumb.data.height,
					crop:     o.thumbCrop,
					margin:   o.thumbMargin,
					complete: function( thumb ) {

						// shrink thumbnails to fit
						var top = ['left', 'top'],
							arr = ['Width', 'Height'],
							m,
							css;

						// calculate shrinked positions
						$.each(arr, function( i, measure ) {
							m = measure.toLowerCase();
							if ( (o.thumbCrop !== true || o.thumbCrop === m ) && o.thumbFit ) {
								css = {};
								css[ m ] = thumb[ m ];
								$( thumb.container ).css( css );
								css = {};
								css[ top[ i ] ] = 0;
								$( thumb.image ).css( css );
							}

							// cache outer measures
							thumb[ 'outer' + measure ] = $( thumb.container )[ 'outer' + measure ]( true );
						});

						// set high quality if downscale is moderate
						Utils.toggleQuality( thumb.image,
							o.thumbQuality === true ||
							( o.thumbQuality === 'auto' && thumb.original.width < thumb.width * 3 )
						);

						// trigger the THUMBNAIL event
						self.trigger({
							type: Galleria.THUMBNAIL,
							thumbTarget: thumb.image,
							index: thumb.data.order
						});
					}
				});
			};

		this._thumbnails = [];

		this.$( 'thumbnails' ).empty();

		// loop through data and create thumbnails
		for( i = 0; this._data[ i ]; i++ ) {

			data = this._data[ i ];

			if ( o.thumbnails === true ) {

				// add a new Picture instance
				thumb = new Galleria.Picture(i);

				// get source from thumb or image
				src = data.thumb || data.image;

				// append the thumbnail
				this.$( 'thumbnails' ).append( thumb.container );

				// cache the container
				$container = $( thumb.container );

				thumb.data = {
					width  : Utils.parseValue( getStyle( 'width' ) ),
					height : Utils.parseValue( getStyle( 'height' ) ),
					order  : i
				};

				// grab & reset size for smoother thumbnail loads
				if ( o.thumbFit && o.thumbCrop !== true ) {
					$container.css( { width: 0, height: 0 } );
				} else {
					$container.css( { width: thumb.data.width, height: thumb.data.height } );
				}

				// load the thumbnail
				thumb.load( src, onThumbLoad );

				// preload all images here
				if ( o.preload === 'all' ) {
					thumb.add( data.image );
				}

			// create empty spans if thumbnails is set to 'empty'
			} else if ( optval === 'empty' || optval === 'numbers' ) {

				thumb = {
					container:  Utils.create( 'galleria-image' ),
					image: Utils.create( 'img', 'span' ),
					ready: true
				};

				// create numbered thumbnails
				if ( optval === 'numbers' ) {
					$( thumb.image ).text( i + 1 );
				}

				this.$( 'thumbnails' ).append( thumb.container );

				// we need to "fake" a loading delay before we append and trigger
				// 50+ should be enough

				window.setTimeout( ( fake )( thumb.image, i, thumb.container ), 50 + ( i*20 ) );

			// create null object to silent errors
			} else {
				thumb = {
					container: null,
					image: null
				};
			}

			// add events for thumbnails
			// you can control the event type using thumb_event_type
			// we'll add the same event to the source if it's kept

			$( thumb.container ).add( o.keepSource && o.linkSourceImages ? data.original : null )
				.data('index', i).bind( o.thumbEventType, onThumbEvent );

			if (active === src) {
				$( thumb.container ).addClass( 'active' );
			}

			this._thumbnails.push( thumb );
		}
	},

	// the internal _run method should be called after loading data into galleria
	// makes sure the gallery has proper measurements before triggering ready
	_run : function() {

		var self = this;

		self._createThumbnails();

		// make sure we have a stageHeight && stageWidth

		Utils.wait({

			until: function() {
				self._stageWidth  = self.$( 'stage' ).width();
				self._stageHeight = self.$( 'stage' ).height();
				return( self._stageWidth && 
						self._stageHeight > 50 ); // what is an acceptable height?
			},

			success: function() {
				self.trigger( Galleria.READY );
			},

			error: function() {
				Galleria.raise('stage measures not found');
			}

		});
	},

	/**
		Loads data into the gallery.
		You can call this method on an existing gallery to reload the gallery with new data.

		@param {Array|string} source Optional JSON array of data or selector of where to find data in the document.
		Defaults to the Galleria target or dataSource option.

		@param {string} selector Optional element selector of what elements to parse.
		Defaults to 'img'.

		@param {Function} [config] Optional function to modify the data extraction proceedure from the selector.
		See the data_config option for more information.

		@returns Instance
	*/

	load : function( source, selector, config ) {

		var self = this;

		// empty the data array
		this._data = [];

		// empty the thumbnails
		this._thumbnails = [];
		this.$('thumbnails').empty();

		// shorten the arguments
		if ( typeof selector === 'function' ) {
			config = selector;
			selector = null;
		}

		// use the source set by target
		source = source || this._options.dataSource;

		// use selector set by option
		selector = selector || this._options.dataSelector;

		// use the data_config set by option
		config = config || this._options.dataConfig;

		// check if the data is an array already
		if ( source.constructor === Array ) {
			if ( this.validate( source) ) {

				this._data = source;
				this._parseData().trigger( Galleria.DATA );

			} else {
				Galleria.raise( 'Load failed: JSON Array not valid.' );
			}
			return this;
		}
		// loop through images and set data
		$( source ).find( selector ).each( function( i, img ) {
			img = $( img );
			var data = {},
				parent = img.parent(),
				href = parent.attr( 'href' );

			// check if it's a link to another image
			if ( /\.(png|gif|jpg|jpeg)(\?.*)?$/i.test(href) ) {
				data.image = href;

			// else assign the href as a link if it exists
			} else if ( href ) {
				data.link = href;
			}

			// mix default extractions with the hrefs and config
			// and push it into the data array
			self._data.push( $.extend({

				title:       img.attr('title'),
				thumb:       img.attr('src'),
				image:       img.attr('src'),
				description: img.attr('alt'),
				link:        img.attr('longdesc'),
				original:    img.get(0) // saved as a reference

			}, data, config( img ) ) );

		});
		// trigger the DATA event and return
		if ( this.getDataLength() ) {
			this.trigger( Galleria.DATA );
		} else {
			Galleria.raise('Load failed: no data found.');
		}
		return this;

	},

	// make sure the data works properly
	_parseData : function() {

		var self = this;

		// copy image as thumb if no thumb exists
		$.each( this._data, function( i, data ) {
			if ( 'thumb' in data === false ) {
				self._data[ i ].thumb = data.image;
			}
		});

		return this;
	},

	/**
		Adds and/or removes images from the gallery
		Works just like Array.splice
		https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/splice

		@example this.splice( 2, 4 ); // removes 4 images after the second image

		@returns Instance
	*/

	splice: function() {
		Array.prototype.splice.apply( this._data, Utils.array( arguments ) );
		return this._parseData()._createThumbnails();
	},

	/**
		Append images to the gallery
		Works just like Array.push
		https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/push

		@example this.push({
			image: 'image1.jpg'
		}); // appends the image to the gallery

		@returns Instance
	*/

	push: function() {
		Array.prototype.push.apply( this._data, Utils.array( arguments ) );
		return this._parseData()._createThumbnails();
	},

	_getActive: function() {
		return this._controls.getActive();
	},

	validate : function( data ) {
		// todo: validate a custom data array
		return true;
	},

	/**
		Bind any event to Galleria

		@param {string} type The Event type to listen for
		@param {Function} fn The function to execute when the event is triggered

		@example this.bind( 'image', function() { Galleria.log('image shown') });

		@returns Instance
	*/

	bind : function(type, fn) {

		// allow 'image' instead of Galleria.IMAGE
		type = _patchEvent( type );

		this.$( 'container' ).bind( type, this.proxy(fn) );
		return this;
	},

	/**
		Unbind any event to Galleria

		@param {string} type The Event type to forget

		@returns Instance
	*/

	unbind : function(type) {

		type = _patchEvent( type );

		this.$( 'container' ).unbind( type );
		return this;
	},

	/**
		Manually trigger a Galleria event

		@param {string} type The Event to trigger

		@returns Instance
	*/

	trigger : function( type ) {

		type = typeof type === 'object' ?
			$.extend( type, { scope: this } ) :
			{ type: _patchEvent( type ), scope: this };

		this.$( 'container' ).trigger( type );

		return this;
	},

	/**
		Assign an "idle state" to any element.
		The idle state will be applied after a certain amount of idle time
		Useful to hide f.ex navigation when the gallery is inactive

		@param {HTMLElement|string} elem The Dom node or selector to apply the idle state to
		@param {Object} styles the CSS styles to apply

		@example addIdleState( this.get('image-nav'), { opacity: 0 });
		@example addIdleState( '.galleria-image-nav', { top: -200 });

		@returns Instance
	*/

	addIdleState: function( elem, styles ) {
		this._idle.add.apply( this._idle, Utils.array( arguments ) );
		return this;
	},

	/**
		Removes any idle state previously set using addIdleState()

		@param {HTMLElement|string} elem The Dom node or selector to remove the idle state from.

		@returns Instance
	*/

	removeIdleState: function( elem ) {
		this._idle.remove.apply( this._idle, Utils.array( arguments ) );
		return this;
	},

	/**
		Force Galleria to enter idle mode.

		@returns Instance
	*/

	enterIdleMode: function() {
		this._idle.hide();
		return this;
	},

	/**
		Force Galleria to exit idle mode.

		@returns Instance
	*/

	exitIdleMode: function() {
		this._idle.show();
		return this;
	},

	/**
		Enter FullScreen mode

		@param {Function} callback the function to be executed when the fullscreen mode is fully applied.

		@returns Instance
	*/

	enterFullscreen: function( callback ) {
		this._fullscreen.enter.apply( this, Utils.array( arguments ) );
		return this;
	},

	/**
		Exits FullScreen mode

		@param {Function} callback the function to be executed when the fullscreen mode is fully applied.

		@returns Instance
	*/

	exitFullscreen: function( callback ) {
		this._fullscreen.exit.apply( this, Utils.array( arguments ) );
		return this;
	},

	/**
		Toggle FullScreen mode

		@param {Function} callback the function to be executed when the fullscreen mode is fully applied or removed.

		@returns Instance
	*/

	toggleFullscreen: function( callback ) {
		this._fullscreen[ this.isFullscreen() ? 'exit' : 'enter'].apply( this, Utils.array( arguments ) );
		return this;
	},

	/**
		Adds a tooltip to any element.
		You can also call this method with an object as argument with elemID:value pairs to apply tooltips to (see examples)

		@param {HTMLElement} elem The DOM Node to attach the event to
		@param {string|Function} value The tooltip message. Can also be a function that returns a string.

		@example this.bindTooltip( this.get('thumbnails'), 'My thumbnails');
		@example this.bindTooltip( this.get('thumbnails'), function() { return 'My thumbs' });
		@example this.bindTooltip( { image_nav: 'Navigation' });

		@returns Instance
	*/

	bindTooltip: function( elem, value ) {
		this._tooltip.bind.apply( this._tooltip, Utils.array(arguments) );
		return this;
	},

	/**
		Note: this method is deprecated. Use refreshTooltip() instead.

		Redefine a tooltip.
		Use this if you want to re-apply a tooltip value to an already bound tooltip element.

		@param {HTMLElement} elem The DOM Node to attach the event to
		@param {string|Function} value The tooltip message. Can also be a function that returns a string.

		@returns Instance
	*/

	defineTooltip: function( elem, value ) {
		this._tooltip.define.apply( this._tooltip, Utils.array(arguments) );
		return this;
	},

	/**
		Refresh a tooltip value.
		Use this if you want to change the tooltip value at runtime, f.ex if you have a play/pause toggle.

		@param {HTMLElement} elem The DOM Node that has a tooltip that should be refreshed

		@returns Instance
	*/

	refreshTooltip: function( elem ) {
		this._tooltip.show.apply( this._tooltip, Utils.array(arguments) );
		return this;
	},

	/**
		Open a pre-designed lightbox with the currently active image.
		You can control some visuals using gallery options.

		@returns Instance
	*/

	openLightbox: function() {
		this._lightbox.show.apply( this._lightbox, Utils.array( arguments ) );
		return this;
	},

	/**
		Close the lightbox.

		@returns Instance
	*/

	closeLightbox: function() {
		this._lightbox.hide.apply( this._lightbox, Utils.array( arguments ) );
		return this;
	},

	/**
		Get the currently active image element.

		@returns {HTMLElement} The image element
	*/

	getActiveImage: function() {
		return this._getActive().image || undef;
	},

	/**
		Get the currently active thumbnail element.

		@returns {HTMLElement} The thumbnail element
	*/

	getActiveThumb: function() {
		return this._thumbnails[ this._active ].image || undef;
	},

	/**
		Get the mouse position relative to the gallery container

		@param e The mouse event

		@example

var gallery = this;
$(document).mousemove(function(e) {
	console.log( gallery.getMousePosition(e).x );
});

		@returns {Object} Object with x & y of the relative mouse postion
	*/

	getMousePosition : function(e) {
		return {
			x: e.pageX - this.$( 'container' ).offset().left,
			y: e.pageY - this.$( 'container' ).offset().top
		};
	},

	/**
		Adds a panning effect to the image

		@param img The optional image element. If not specified it takes the currently active image

		@returns Instance
	*/

	addPan : function( img ) {

		if ( this._options.imageCrop === false ) {
			return;
		}

		img = $( img || this.getActiveImage() );

		// define some variables and methods
		var self   = this,
			x      = img.width() / 2,
			y      = img.height() / 2,
			destX  = parseInt( img.css( 'left' ), 10 ),
			destY  = parseInt( img.css( 'top' ), 10 ),
			curX   = destX || 0,
			curY   = destY || 0,
			distX  = 0,
			distY  = 0,
			active = false,
			ts     = Utils.timestamp(),
			cache  = 0,
			move   = 0,

			// positions the image
			position = function( dist, cur, pos ) {
				if ( dist > 0 ) {
					move = Math.round( Math.max( dist * -1, Math.min( 0, cur ) ) );
					if ( cache !== move ) {

						cache = move;

						if ( IE === 8 ) { // scroll is faster for IE
							img.parent()[ 'scroll' + pos ]( move * -1 );
						} else {
							var css = {};
							css[ pos.toLowerCase() ] = move;
							img.css(css);
						}
					}
				}
			},

			// calculates mouse position after 50ms
			calculate = function(e) {
				if (Utils.timestamp() - ts < 50) {
					return;
				}
				active = true;
				x = self.getMousePosition(e).x;
				y = self.getMousePosition(e).y;
			},

			// the main loop to check
			loop = function(e) {

				if (!active) {
					return;
				}

				distX = img.width() - self._stageWidth;
				distY = img.height() - self._stageHeight;
				destX = x / self._stageWidth * distX * -1;
				destY = y / self._stageHeight * distY * -1;
				curX += ( destX - curX ) / self._options.imagePanSmoothness;
				curY += ( destY - curY ) / self._options.imagePanSmoothness;

				position( distY, curY, 'Top' );
				position( distX, curX, 'Left' );

			};

		// we need to use scroll in IE8 to speed things up
		if ( IE === 8 ) {

			img.parent().scrollTop( curY * -1 ).scrollLeft( curX * -1 );
			img.css({
				top: 0,
				left: 0
			});

		}

		// unbind and bind event
		this.$( 'stage' ).unbind( 'mousemove', calculate ).bind( 'mousemove', calculate );

		// loop the loop
		Utils.addTimer('pan', loop, 50, true);

		return this;
	},

	/**
		Brings the scope into any callback

		@param fn The callback to bring the scope into
		@param scope Optional scope to bring

		@example $('#fullscreen').click( this.proxy(function() { this.enterFullscreen(); }) )

		@returns {Function} Return the callback with the gallery scope
	*/

	proxy : function( fn, scope ) {
		if ( typeof fn !== 'function' ) {
			return function() {};
		}
		scope = scope || this;
		return function() {
			return fn.apply( scope, Utils.array( arguments ) );
		};
	},

	/**
		Removes the panning effect set by addPan()

		@returns Instance
	*/

	removePan: function() {

		// todo: doublecheck IE8

		this.$( 'stage' ).unbind( 'mousemove' );

		Utils.clearTimer( 'pan' );

		return this;
	},

	/**
		Adds an element to the Galleria DOM array.
		When you add an element here, you can access it using element ID in many API calls

		@param {string} id The element ID you wish to use. You can add many elements by adding more arguments.

		@example addElement('mybutton');
		@example addElement('mybutton','mylink');

		@returns Instance
	*/

	addElement : function( id ) {

		var dom = this._dom;

		$.each( Utils.array(arguments), function( i, blueprint ) {
		   dom[ blueprint ] = Utils.create( 'galleria-' + blueprint );
		});

		return this;
	},

	/**
		Attach keyboard events to Galleria

		@param {Object} map The map object of events.
		Possible keys are 'UP', 'DOWN', 'LEFT', 'RIGHT', 'RETURN', 'ESCAPE', 'BACKSPACE', and 'SPACE'.

		@example

this.attachKeyboard({
	right: this.next,
	left: this.prev,
	up: function() {
		console.log( 'up key pressed' )
	}
});

		@returns Instance
	*/

	attachKeyboard : function( map ) {
		this._keyboard.attach.apply( this._keyboard, Utils.array( arguments ) );
		return this;
	},

	/**
		Detach all keyboard events to Galleria

		@returns Instance
	*/

	detachKeyboard : function() {
		this._keyboard.detach.apply( this._keyboard, Utils.array( arguments ) );
		return this;
	},

	/**
		Fast helper for appending galleria elements that you added using addElement()

		@param {string} parentID The parent element ID where the element will be appended
		@param {string} childID the element ID that should be appended

		@example this.addElement('myElement');
		this.appendChild( 'info', 'myElement' );

		@returns Instance
	*/

	appendChild : function( parentID, childID ) {
		this.$( parentID ).append( this.get( childID ) || childID );
		return this;
	},

	/**
		Fast helper for prepending galleria elements that you added using addElement()

		@param {string} parentID The parent element ID where the element will be prepended
		@param {string} childID the element ID that should be prepended

		@example

this.addElement('myElement');
this.prependChild( 'info', 'myElement' );

		@returns Instance
	*/

	prependChild : function( parentID, childID ) {
		this.$( parentID ).prepend( this.get( childID ) || childID );
		return this;
	},

	/**
		Remove an element by blueprint

		@param {string} elemID The element to be removed.
		You can remove multiple elements by adding arguments.

		@returns Instance
	*/

	remove : function( elemID ) {
		this.$( Utils.array( arguments ).join(',') ).remove();
		return this;
	},

	// a fast helper for building dom structures
	// leave this out of the API for now

	append : function( data ) {
		var i, j;
		for( i in data ) {
			if ( data.hasOwnProperty( i ) ) {
				if ( data[i].constructor === Array ) {
					for( j = 0; data[i][j]; j++ ) {
						this.appendChild( i, data[i][j] );
					}
				} else {
					this.appendChild( i, data[i] );
				}
			}
		}
		return this;
	},

	// an internal helper for scaling according to options
	_scaleImage : function( image, options ) {

		options = $.extend({
			width:    this._stageWidth,
			height:   this._stageHeight,
			crop:     this._options.imageCrop,
			max:      this._options.maxScaleRatio,
			min:      this._options.minScaleRatio,
			margin:   this._options.imageMargin,
			position: this._options.imagePosition
		}, options );

	   ( image || this._controls.getActive() ).scale( options );

		return this;
	},

	/**
		Updates the carousel,
		useful if you resize the gallery and want to re-check if the carousel nav is needed.

		@returns Instance
	*/

	updateCarousel : function() {
		this._carousel.update();
		return this;
	},

	/**
		Rescales the gallery

		@param {number} width The target width
		@param {number} height The target height
		@param {Function} complete The callback to be called when the scaling is complete

		@returns Instance
	*/

	rescale : function( width, height, complete ) {

		var self = this;

		// allow rescale(fn)
		if ( typeof width === 'function' ) {
			complete = width;
			width = undef;
		}

		var scale = function() {

			// set stagewidth
			self._stageWidth = width || self.$( 'stage' ).width();
			self._stageHeight = height || self.$( 'stage' ).height();

			// scale the active image
			self._scaleImage();

			if ( self._options.carousel ) {
				self.updateCarousel();
			}

			self.trigger( Galleria.RESCALE );

			if ( typeof complete === 'function' ) {
				complete.call( self );
			}
		};

		if ( Galleria.WEBKIT && !width && !height ) {
			Utils.addTimer( 'scale', scale, 5 );// webkit is too fast
		} else {
			scale.call( self );
		}

		return this;
	},

	/**
		Refreshes the gallery.
		Useful if you change image options at runtime and want to apply the changes to the active image.

		@returns Instance
	*/

	refreshImage : function() {
		this._scaleImage();
		if ( this._options.imagePan ) {
			this.addPan();
		}
		return this;
	},

	/**
		Shows an image by index

		@param {number|boolean} index The index to show
		@param {Boolean} rewind A boolean that should be true if you want the transition to go back

		@returns Instance
	*/

	show : function( index, rewind, _history ) {

		// do nothing if index is false or queue is false and transition is in progress
		if ( index === false || ( !this._options.queue && this._queue.stalled ) ) {
			return;
		}

		index = Math.max( 0, Math.min( parseInt( index, 10 ), this.getDataLength() - 1 ) );

		rewind = typeof rewind !== 'undefined' ? !!rewind : index < this.getIndex();

		_history = _history || false;

		// do the history thing and return
		if ( !_history && Galleria.History ) {
			Galleria.History.value( index.toString() );
			return;
		}

		this._active = index;

		Array.prototype.push.call( this._queue, {
			index : index,
			rewind : rewind
		});
		if ( !this._queue.stalled ) {
			this._show();
		}

		return this;
	},

	// the internal _show method does the actual showing
	_show : function() {

		// shortcuts
		var self   = this,
			queue  = this._queue[ 0 ],
			data   = this.getData( queue.index );

		if ( !data ) {
			return;
		}

		var src    = data.image,
			active = this._controls.getActive(),
			next   = this._controls.getNext(),
			cached = next.isCached( src ),
			thumb  = this._thumbnails[ queue.index ];

		// to be fired when loading & transition is complete:
		var complete = function() {

			var win;

			// remove stalled
			self._queue.stalled = false;

			// optimize quality
			Utils.toggleQuality( next.image, self._options.imageQuality );

			// swap
			$( active.container ).css({
				zIndex: 0,
				opacity: 0
			});
			$( next.container ).css({
				zIndex: 1,
				opacity: 1
			});
			self._controls.swap();

			// add pan according to option
			if ( self._options.imagePan ) {
				self.addPan( next.image );
			}

			// make the image link
			if ( data.link ) {

				$( next.image ).css({
					cursor: 'pointer'
				}).bind( CLICK(), function() {

					// popup link
					if ( self._options.popupLinks ) {
						win = window.open( data.link, '_blank' );
					} else {
						window.location.href = data.link;
					}
				});
			}

			// remove the queued image
			Array.prototype.shift.call( self._queue );

			// if we still have images in the queue, show it
			if ( self._queue.length ) {
				self._show();
			}

			// check if we are playing
			self._playCheck();

			// trigger IMAGE event
			self.trigger({
				type:        Galleria.IMAGE,
				index:       queue.index,
				imageTarget: next.image,
				thumbTarget: thumb.image
			});
		};

		// let the carousel follow
		if ( this._options.carousel && this._options.carouselFollow ) {
			this._carousel.follow( queue.index );
		}

		// preload images
		if ( this._options.preload ) {

			var p, i,
				n = this.getNext();

			try {
				for ( i = this._options.preload; i > 0; i-- ) {
					p = new Galleria.Picture();
					p.add( self.getData( n ).image );
					n = self.getNext( n );
				}
			} catch(e) {}
		}

		// show the next image, just in case
		Utils.show( next.container );

		// add active classes
		$( self._thumbnails[ queue.index ].container )
			.addClass( 'active' )
			.siblings( '.active' )
			.removeClass( 'active' );

		// trigger the LOADSTART event
		self.trigger( {
			type: Galleria.LOADSTART,
			cached: cached,
			index: queue.index,
			imageTarget: next.image,
			thumbTarget: thumb.image
		});
		// begin loading the next image
		next.load( src, function( next ) {
			self._scaleImage( next, {

				complete: function( next ) {

					Utils.show( next.container );

					// toggle low quality for IE
					if ( 'image' in active ) {
						Utils.toggleQuality( active.image, false );
					}
					Utils.toggleQuality( next.image, false );

					// stall the queue
					self._queue.stalled = true;

					// remove the image panning, if applied
					// TODO: rethink if this is necessary
					self.removePan();

					// set the captions and counter
					self.setInfo( queue.index );
					self.setCounter( queue.index );

					// trigger the LOADFINISH event
					self.trigger({
						type: Galleria.LOADFINISH,
						cached: cached,
						index: queue.index,
						imageTarget: next.image,
						thumbTarget: self._thumbnails[ queue.index ].image
					});

					var transition = active.image === null && self._options.transitionInitial ?
						self._options.transition_Initial : self._options.transition;

					// validate the transition
					if ( transition in _transitions === false ) {

						complete();

					} else {
						var params = {
							prev:   active.image,
							next:   next.image,
							rewind: queue.rewind,
							speed:  self._options.transitionSpeed || 400
						};

						// call the transition function and send some stuff
						_transitions[ transition ].call(self, params, complete );

					}
				}
			});
		});
	},

	/**
		Gets the next index

		@param {number} base Optional starting point

		@returns {number} the next index, or the first if you are at the first (looping)
	*/

	getNext : function( base ) {
		base = typeof base === 'number' ? base : this.getIndex();
		return base === this.getDataLength() - 1 ? 0 : base + 1;
	},

	/**
		Gets the previous index

		@param {number} base Optional starting point

		@returns {number} the previous index, or the last if you are at the first (looping)
	*/

	getPrev : function( base ) {
		base = typeof base === 'number' ? base : this.getIndex();
		return base === 0 ? this.getDataLength() - 1 : base - 1;
	},

	/**
		Shows the next image in line

		@returns Instance
	*/

	next : function() {
		if ( this.getDataLength() > 1 ) {
			this.show( this.getNext(), false );
		}
		return this;
	},

	/**
		Shows the previous image in line

		@returns Instance
	*/

	prev : function() {
		if ( this.getDataLength() > 1 ) {
			this.show( this.getPrev(), true );
		}
		return this;
	},

	/**
		Retrieve a DOM element by element ID

		@param {string} elemId The delement ID to fetch

		@returns {HTMLElement} The elements DOM node or null if not found.
	*/

	get : function( elemId ) {
		return elemId in this._dom ? this._dom[ elemId ] : null;
	},

	/**
		Retrieve a data object

		@param {number} index The data index to retrieve.
		If no index specified it will take the currently active image

		@returns {Object} The data object
	*/

	getData : function( index ) {
		return index in this._data ?
			this._data[ index ] : this._data[ this._active ];
	},

	/**
		Retrieve the number of data items

		@returns {number} The data length
	*/
	getDataLength : function() {
		return this._data.length;
	},

	/**
		Retrieve the currently active index

		@returns {number|boolean} The active index or false if none found
	*/

	getIndex : function() {
		return typeof this._active === 'number' ? this._active : false;
	},

	/**
		Retrieve the stage height

		@returns {number} The stage height
	*/

	getStageHeight : function() {
		return this._stageHeight;
	},

	/**
		Retrieve the stage width

		@returns {number} The stage width
	*/

	getStageWidth : function() {
		return this._stageWidth;
	},

	/**
		Retrieve the option

		@param {string} key The option key to retrieve. If no key specified it will return all options in an object.

		@returns option or options
	*/

	getOptions : function( key ) {
		return typeof key === 'undefined' ? this._options : this._options[ key ];
	},

	/**
		Set options to the instance.
		You can set options using a key & value argument or a single object argument (see examples)

		@param {string} key The option key
		@param {string} value the the options value

		@example setOptions( 'autoplay', true )
		@example setOptions({ autoplay: true });

		@returns Instance
	*/

	setOptions : function( key, value ) {
		if ( typeof key === 'object' ) {
			$.extend( this._options, key );
		} else {
			this._options[ key ] = value;
		}
		return this;
	},

	/**
		Starts playing the slideshow

		@param {number} delay Sets the slideshow interval in milliseconds.
		If you set it once, you can just call play() and get the same interval the next time.

		@returns Instance
	*/

	play : function( delay ) {

		this._playing = true;

		this._playtime = delay || this._playtime;

		this._playCheck();

		this.trigger( Galleria.PLAY );

		return this;
	},

	/**
		Stops the slideshow if currently playing

		@returns Instance
	*/

	pause : function() {

		this._playing = false;

		this.trigger( Galleria.PAUSE );

		return this;
	},

	/**
		Toggle between play and pause events.

		@param {number} delay Sets the slideshow interval in milliseconds.

		@returns Instance
	*/

	playToggle : function( delay ) {
		return ( this._playing ) ? this.pause() : this.play( delay );
	},

	/**
		Checks if the gallery is currently playing

		@returns {Boolean}
	*/

	isPlaying : function() {
		return this._playing;
	},

	/**
		Checks if the gallery is currently in fullscreen mode

		@returns {Boolean}
	*/

	isFullscreen : function() {
		return this._fullscreen.active;
	},

	_playCheck : function() {
		var self = this,
			played = 0,
			interval = 20,
			now = Utils.timestamp(),
			timer_id = 'play' + this._id;

		if ( this._playing ) {

			Utils.clearTimer( timer_id );

			var fn = function() {

				played = Utils.timestamp() - now;
				if ( played >= self._playtime && self._playing ) {
					Utils.clearTimer( timer_id );
					self.next();
					return;
				}
				if ( self._playing ) {

					// trigger the PROGRESS event
					self.trigger({
						type:         Galleria.PROGRESS,
						percent:      Math.ceil( played / self._playtime * 100 ),
						seconds:      Math.floor( played / 1000 ),
						milliseconds: played
					});

					Utils.addTimer( timer_id, fn, interval );
				}
			};
			Utils.addTimer( timer_id, fn, interval );
		}
	},

	setIndex: function( val ) {
		this._active = val;
		return this;
	},

	/**
		Manually modify the counter

		@param {number} index Optional data index to fectch,
		if no index found it assumes the currently active index

		@returns Instance
	*/

	setCounter: function( index ) {

		if ( typeof index === 'number' ) {
			index++;
		} else if ( typeof index === 'undefined' ) {
			index = this.getIndex()+1;
		}

		this.get( 'current' ).innerHTML = index;

		if ( IE ) { // weird IE bug

			var count = this.$( 'counter' ),
				opacity = count.css( 'opacity' ),
				style = count.attr('style');

			if (opacity === 1) {
				count.attr('style', style.replace(/filter[^\;]+\;/i,''));
			} else {
				this.$( 'counter' ).css( 'opacity', opacity );
			}

		}

		return this;
	},

	/**
		Manually set captions

		@param {number} index Optional data index to fectch and apply as caption,
		if no index found it assumes the currently active index

		@returns Instance
	*/

	setInfo : function( index ) {

		var self = this,
			data = this.getData( index );

		$.each( ['title','description','author'], function( i, type ) {

			var elem = self.$( 'info-' + type );

			if ( !!data[type] ) {
				elem[ data[ type ].length ? 'show' : 'hide' ]().html( data[ type ] );
			} else {
			   elem.empty().hide();
			}
		});

		return this;
	},

	/**
		Checks if the data contains any captions

		@param {number} index Optional data index to fectch,
		if no index found it assumes the currently active index.

		@returns {boolean}
	*/

	hasInfo : function( index ) {

		var check = 'title description'.split(' '),
			i;

		for ( i = 0; check[i]; i++ ) {
			if ( !!this.getData( index )[ check[i] ] ) {
				return true;
			}
		}
		return false;

	},

	jQuery : function( str ) {

		var self = this,
			ret = [];

		$.each( str.split(','), function( i, elemId ) {
			elemId = $.trim( elemId );

			if ( self.get( elemId ) ) {
				ret.push( elemId );
			}
		});

		var jQ = $( self.get( ret.shift() ) );

		$.each( ret, function( i, elemId ) {
			jQ = jQ.add( self.get( elemId ) );
		});

		return jQ;

	},

	/**
		Converts element IDs into a jQuery collection
		You can call for multiple IDs separated with commas.

		@param {string} str One or more element IDs (comma-separated)

		@returns jQuery

		@example this.$('info,container').hide();
	*/

	$ : function( str ) {
		return this.jQuery.apply( this, Utils.array( arguments ) );
	}

};

// End of Galleria prototype

// Add events as static variables
$.each( _events, function( i, ev ) {

	// legacy events
	var type = /_/.test( ev ) ? ev.replace( /_/g, '' ) : ev;

	Galleria[ ev.toUpperCase() ] = 'galleria.'+type;

} );

$.extend( Galleria, {

	// Browser helpers
	IE9:     IE === 9,
	IE8:     IE === 8,
	IE7:     IE === 7,
	IE6:     IE === 6,
	IE:      !!IE,
	WEBKIT:  /webkit/.test( NAV ),
	SAFARI:  /safari/.test( NAV ),
	CHROME:  /chrome/.test( NAV ),
	QUIRK:   ( IE && doc.compatMode && doc.compatMode === "BackCompat" ),
	MAC:     /mac/.test( navigator.platform.toLowerCase() ),
	OPERA:   !!window.opera,
	IPHONE:  /iphone/.test( NAV ),
	IPAD:    /ipad/.test( NAV ),
	ANDROID: /android/.test( NAV ),

	// Todo detect touch devices in a better way, possibly using event detection
	TOUCH:   !!( /iphone/.test( NAV ) || /ipad/.test( NAV ) || /android/.test( NAV ) )

});

// Galleria static methods

/**
	Adds a theme that you can use for your Gallery

	@param {Object} theme Object that should contain all your theme settings.
	<ul>
		<li>name – name of the theme</li>
		<li>author - name of the author</li>
		<li>css - css file name (not path)</li>
		<li>defaults - default options to apply, including theme-specific options</li>
		<li>init - the init function</li>
	</ul>

	@returns {Object} theme
*/

Galleria.addTheme = function( theme ) {

	// make sure we have a name
	if ( !theme.name ) {
		Galleria.raise('No theme name specified');
	}

	if ( typeof theme.defaults !== 'object' ) {
		theme.defaults = {};
	} else {
		theme.defaults = _legacyOptions( theme.defaults );
	}

	if ( typeof theme.css === 'string' ) {

		var css;

		// look for the absolute path
		$('script').each(function( i, script ) {

			// look for the theme script
			var reg = new RegExp( 'galleria\\.' + theme.name.toLowerCase() + '\\.' );
			if( reg.test( script.src )) {

				// we have a match
				css = script.src.replace(/[^\/]*$/, '') + theme.css;

				Utils.addTimer( "css", function() {
					Utils.loadCSS( css, 'galleria-theme', function() {
						Galleria.theme = theme;
						$doc.trigger( Galleria.THEMELOAD );
					});
				}, 1);

			}
		});

		if ( !css ) {
			Galleria.raise('No theme CSS loaded');
		}
	} else {
		Galleria.theme = theme;
		$doc.trigger( Galleria.THEMELOAD );
	}
	return theme;
};

/**
	loadTheme loads a theme js file and attaches a load event to Galleria

	@param {string} src The relative path to the theme source file

	@param {Object} [options] Optional options you want to apply
*/

Galleria.loadTheme = function( src, options ) {

	var loaded = false,
		length = _galleries.length;

	// first clear the current theme, if exists
	Galleria.theme = undef;

	// load the theme
	Utils.loadScript( src, function() {
		loaded = true;
	} );

	// set a 1 sec timeout, then display a hard error if no theme is loaded
	Utils.wait({
		until: function() {
			return loaded;
		},
		error: function() {
			Galleria.raise( "Theme at " + src + " could not load, check theme path.", true );
		},
		success: function() {

			// check for existing galleries and reload them with the new theme
			if ( length ) {

				// temporary save the new galleries
				var refreshed = [];

				// refresh all instances
				// when adding a new theme to an existing gallery, all options will be resetted but the data will be kept
				// you can apply new options as a second argument
				$.each( Galleria.get(), function(i, instance) {

					// mix the old data and options into the new instance
					var op = $.extend( instance._original.options, {
						data_source: instance._data
					}, options);

					// remove the old container
					instance.$('container').remove();

					// create a new instance
					var g = new Galleria();

					// move the id
					g._id = instance._id;

					// initialize the new instance
					g.init( instance._original.target, op );

					// push the new instance
					refreshed.push( g );
				});

				// now overwrite the old holder with the new instances
				_galleries = refreshed;
			}
		},
		timeout: 2000
	});
};

/**
	Retrieves a Galleria instance.

	@param {number} [index] Optional index to retrieve.
	If no index is supplied, the method will return all instances in an array.

	@returns Instance or Array of instances
*/

Galleria.get = function( index ) {
	if ( !!_galleries[ index ] ) {
		return _galleries[ index ];
	} else if ( typeof index !== 'number' ) {
		return _galleries;
	} else {
		Galleria.raise('Gallery index ' + index + ' not found');
	}
};

/**
	Creates a transition to be used in your gallery

	@param {string} name The name of the transition that you will use as an option

	@param {Function} fn The function to be executed in the transition.
	The function contains two arguments, params and complete.
	Use the params Object to integrate the transition, and then call complete when you are done.

*/

Galleria.addTransition = function( name, fn ) {
	_transitions[name] = fn;
};

Galleria.utils = Utils;

/**
	A helper metod for cross-browser logging.
	It uses the console log if available otherwise it falls back to the opera
	debugger and finally <code>alert()</code>

	@example Galleria.log("hello", document.body, [1,2,3]);
*/

Galleria.log = function() {
	try {
		window.console.log.apply( window.console, Utils.array( arguments ) );
	} catch( e ) {
		try {
			window.opera.postError.apply( window.opera, arguments );
		} catch( er ) {
			  window.alert( Utils.array( arguments ).split(', ') );
		}
	}
};

/**
	Method for raising errors

	@param {string} msg The message to throw

	@param {boolean} [fatal] Set this to true to override debug settings and display a fatal error
*/

Galleria.raise = function( msg, fatal ) {

	if ( DEBUG || fatal ) {
		var type = fatal ? 'Fatal error' : 'Error';
		throw new Error( type + ': ' + msg );
	}

};

/**
	Adds preload, cache, scale and crop functionality

	@constructor

	@requires jQuery

	@param {number} [id] Optional id to keep track of instances
*/

Galleria.Picture = function( id ) {

	// save the id
	this.id = id || null;

	// the image should be null until loaded
	this.image = null;

	// Create a new container
	this.container = Utils.create('galleria-image');

	// add container styles
	$( this.container ).css({
		overflow: 'hidden',
		position: 'relative' // for IE Standards mode
	});

	// saves the original measurements
	this.original = {
		width: 0,
		height: 0
	};

	// flag when the image is ready
	this.ready = false;

	// flag when the image is loaded
	this.loaded = false;

};

Galleria.Picture.prototype = {

	// the inherited cache object
	cache: {},

	// creates a new image and adds it to cache when loaded
	add: function( src ) {

		var self = this;

		// create the image
		var image = new Image();

		// force a block display
		$( image ).css( 'display', 'block');
		
		// There are strange cache issues in webkit, 
		// but for other browsers we can bypass the onload event
		if (! Galleria.WEBKIT ) {

			if ( self.cache[ src ] ) {
				// no need to onload if the image is cached
				image.src = src;
				self.loaded = true;
				self.original = {
					height: image.height,
					width: image.width
				};
				return image;
			}
		}

		// begin preload and insert in cache when done
		$(image).load(function() {
			
			self.original = {
				height: this.height,
				width: this.width
			};
			
			self.cache[ src ] = src; // will override old cache
			self.loaded = true;
			
		}).attr('src', src);

		return image;

	},

	// show the image on stage
	show: function() {
		Utils.show( this.image );
	},

	// hide the image
	hide: function() {
		Utils.moveOut( this.image );
	},

	clear: function() {
		this.image = null;
	},

	/**
		Checks if an image is in cache

		@param {string} src The image source path, ex '/path/to/img.jpg'

		@returns {boolean}
	*/

	isCached: function( src ) {
		return !!this.cache[src];
	},

	/**
		Loads an image and call the callback when ready.
		Will also add the image to cache.

		@param {string} src The image source path, ex '/path/to/img.jpg'
		@param {Function} callback The function to be executed when the image is loaded & scaled

		@returns The image container (jQuery object)
	*/

	load: function(src, callback) {

		// save the instance
		var self = this;

		$( this.container ).empty(true);

		// add the image to cache and hide it
		this.image = this.add( src );
		Utils.hide( this.image );

		// append the image into the container
		$( this.container ).append( this.image );

		// check for loaded image using a timeout
		Utils.wait({
			until: function() {
				// TODO this should be properly tested in Opera
				return self.loaded && self.image.complete && self.original.width && self.image.width;
			},
			success: function() {
				// call success
				window.setTimeout(function() { callback.call( self, self ); }, 50 );
			},
			error: function() {
				window.setTimeout(function() { callback.call( self, self ); }, 50 );
				Galleria.raise('image not loaded in 10 seconds: '+ src);
			},
			timeout: 10000
		});

		// return the container
		return this.container;
	},

	/**
		Scales and crops the image

		@param {Object} options The method takes an object with a number of options:

		<ul>
			<li>width - width of the container</li>
			<li>height - height of the container</li>
			<li>min - minimum scale ratio</li>
			<li>max - maximum scale ratio</li>
			<li>margin - distance in pixels from the image border to the container</li>
			<li>complete - a callback that fires when scaling is complete</li>
			<li>position - positions the image, works like the css background-image property.</li>
			<li>crop - defines how to crop. Can be true, false, 'width' or 'height'</li>
		</ul>

		@returns The image container object (jQuery)
	*/

	scale: function( options ) {

		// extend some defaults
		options = $.extend({
			width: 0,
			height: 0,
			min: undef,
			max: undef,
			margin: 0,
			complete: function() {},
			position: 'center',
			crop: false
		}, options);

		// return the element if no image found
		if (!this.image) {
			return this.container;
		}

		// store locale variables of width & height
		var width,
			height,
			self = this,
			$container = $( self.container );

		// wait for the width/height
		Utils.wait({
			until: function() {

				width  = options.width
					|| $container.width()
					|| Utils.parseValue( $container.css('width') );

				height = options.height
					|| $container.height()
					|| Utils.parseValue( $container.css('height') );

				return width && height;
			},
			success: function() {
				// calculate some cropping
				var newWidth = ( width - options.margin * 2 ) / self.original.width,
					newHeight = ( height - options.margin * 2 ) / self.original.height,
					cropMap = {
						'true'  : Math.max( newWidth, newHeight ),
						'width' : newWidth,
						'height': newHeight,
						'false' : Math.min( newWidth, newHeight )
					},
					ratio = cropMap[ options.crop.toString() ];

				// allow max_scale_ratio
				if ( options.max ) {
					ratio = Math.min( options.max, ratio );
				}

				// allow min_scale_ratio
				if ( options.min ) {
					ratio = Math.max( options.min, ratio );
				}

				$( self.container ).width( width ).height( height );

				// round up the width / height
				$.each( ['width','height'], function( i, m ) {
					$( self.image )[ m ]( self.image[m] = self[ m ] = Math.ceil( self.original[ m ] * ratio ) );
				});

				// calculate image_position
				var pos = {},
					mix = {},
					getPosition = function(value, measure, margin) {
						var result = 0;
						if (/\%/.test(value)) {
							var flt = parseInt( value, 10 ) / 100,
								m = self.image[ measure ] || $( self.image )[ measure ]();

							result = Math.ceil( m * -1 * flt + margin * flt );
						} else {
							result = Utils.parseValue( value );
						}
						return result;
					},
					positionMap = {
						'top': { top: 0 },
						'left': { left: 0 },
						'right': { left: '100%' },
						'bottom': { top: '100%' }
					};

				$.each( options.position.toLowerCase().split(' '), function( i, value ) {
					if ( value === 'center' ) {
						value = '50%';
					}
					pos[i ? 'top' : 'left'] = value;
				});

				$.each( pos, function( i, value ) {
					if ( positionMap.hasOwnProperty( value ) ) {
						$.extend( mix, positionMap[ value ] );
					}
				});

				pos = pos.top ? $.extend( pos, mix ) : mix;

				pos = $.extend({
					top: '50%',
					left: '50%'
				}, pos);

				// apply position
				$( self.image ).css({
					position : 'relative',
					top :  getPosition(pos.top, 'height', height),
					left : getPosition(pos.left, 'width', width)
				});

				// show the image
				self.show();

				// flag ready and call the callback
				self.ready = true;
				options.complete.call( self, self );
			},
			error: function() {
				Galleria.raise('Could not scale image: '+self.image.src);
			},
			timeout: 1000
		});
		return this;
	}
};

// our own easings
$.extend( $.easing, {

	galleria: function (_, t, b, c, d) {
		if ((t/=d/2) < 1) {
			return c/2*t*t*t*t + b;
		}
		return -c/2 * ((t-=2)*t*t*t - 2) + b;
	},

	galleriaIn: function (_, t, b, c, d) {
		return c*(t/=d)*t*t*t + b;
	},

	galleriaOut: function (_, t, b, c, d) {
		return -c * ((t=t/d-1)*t*t*t - 1) + b;
	}

});

// the plugin initializer
$.fn.galleria = function( options ) {

	return this.each(function() {

		var gallery = new Galleria();
		gallery.init( this, options );

	});
};

// Expose
window.Galleria = Galleria;

// phew

}( jQuery ) );