// Tipsy, ver. 1.0.0a
(function($){
	function fixTitle($ele) { if ($ele.attr('title') || typeof($ele.attr('original-title')) != 'string') { $ele.attr('original-title', $ele.attr('title') || '').removeAttr('title'); } }
	function Tipsy(element, options){
			this.$element = $(element);
			this.options = options;
			this.enabled = true;
			fixTitle(this.$element);
	}

	Tipsy.prototype = {
			show: function() {
					var title = this.getTitle();
					if (title && this.enabled) {
							var $tip = this.tip();

							$tip.find('.tipsy-inner')[this.options.html ? 'html' : 'text'](title);
							$tip[0].className = 'tipsy';
							$tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).appendTo(document.body);

							var pos = $.extend({}, this.$element.offset(), {
									width: this.$element[0].offsetWidth,
									height: this.$element[0].offsetHeight
							});
							var actualWidth = $tip[0].offsetWidth, actualHeight = $tip[0].offsetHeight;
							var gravity = (typeof this.options.gravity == 'function')
															? this.options.gravity.call(this.$element[0])
															: this.options.gravity;
							var tp;
							switch (gravity.charAt(0)) {
									case 'n':
											tp = {top: pos.top + pos.height + this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
											break;
									case 's':
											tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
											break;
									case 'e':
											tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
											break;
									case 'w':
											tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width + this.options.offset};
											break;
							}

							if (gravity.length == 2) {
									if (gravity.charAt(1) == 'w') { tp.left = pos.left + pos.width / 2 - 15; } 
									else { tp.left = pos.left + pos.width / 2 - actualWidth + 15; }
							}
							$tip.css(tp).addClass('tipsy-' + gravity);                
							if (this.options.fade) { $tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: this.options.opacity}); } 
							else { $tip.css({visibility: 'visible', opacity: this.options.opacity}); }
					}
			},

			hide: function() {
					if (this.options.fade) { this.tip().stop().fadeOut(function() { $(this).remove(); }); } 
					else { this.tip().remove(); }
			},

			getTitle: function() {
					var title, $e = this.$element, o = this.options;
					fixTitle($e);
					var title, o = this.options;
					if (typeof o.title == 'string') {
							title = $e.attr(o.title == 'title' ? 'original-title' : o.title);
					} else if (typeof o.title == 'function') {
							title = o.title.call($e[0]);
					}
					title = ('' + title).replace(/(^\s*|\s*$)/, "");
					return title || o.fallback;
			},

			tip: function() {
					if (!this.$tip) { this.$tip = $('<div class="tipsy"></div>').html('<div class="tipsy-arrow"></div><div class="tipsy-inner"/></div>'); }
					return this.$tip;
			},
			validate: function() { if (!this.$element[0].parentNode) this.hide(); },        
			enable: function() { this.enabled = true; },
			disable: function() { this.enabled = false; },
			toggleEnabled: function() { this.enabled = !this.enabled; }
	};

	$.fn.tipsy = function(options) {

			if (options === true) {
					return this.data('tipsy');
			} else if (typeof options == 'string') {
					return this.data('tipsy')[options]();
			}

			options = $.extend({}, $.fn.tipsy.defaults, options);

			function get(ele) {
					var tipsy = $.data(ele, 'tipsy');
					if (!tipsy) {
							tipsy = new Tipsy(ele, $.fn.tipsy.elementOptions(ele, options));
							$.data(ele, 'tipsy', tipsy);
					}
					return tipsy;
			}
			function enter() {
					var tipsy = get(this);
					tipsy.hoverState = 'in';
					if (options.delayIn == 0) { tipsy.show(); } 
					else { setTimeout(function() { if (tipsy.hoverState == 'in') tipsy.show(); }, options.delayIn); }
			};
			function leave(){
					var tipsy = get(this);
					tipsy.hoverState = 'out';
					if (options.delayOut == 0){ tipsy.hide(); } 
					else { setTimeout(function() { if (tipsy.hoverState == 'out') tipsy.hide(); }, options.delayOut); }
			};
			if (!options.live) this.each(function() { get(this); });
			if (options.trigger != 'manual') {
					var binder   = options.live ? 'live' : 'bind',
							eventIn  = options.trigger == 'hover' ? 'mouseenter' : 'focus',
							eventOut = options.trigger == 'hover' ? 'mouseleave' : 'blur';
					this[binder](eventIn, enter)[binder](eventOut, leave);
			}
			return this;
	};

	$.fn.tipsy.defaults = {
			delayIn: 0,
			delayOut: 0,
			fade: false,
			fallback: '',
			gravity: 'n',
			html: false,
			live: false,
			offset: 0,
			opacity: 0.8,
			title: 'title',
			trigger: 'hover'
	};

	$.fn.tipsy.elementOptions = function(ele, options){ return $.metadata ? $.extend({}, options, $(ele).metadata()) : options; };    
	$.fn.tipsy.autoNS = function(){ return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n'; };
	$.fn.tipsy.autoWE = function(){ return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w'; };

})(jQuery);