// tipsy, facebook style tooltips for jquery
// version 1.0.0a
// (c) 2008-2010 jason frame [jason@onehackoranother.com]
// releated under the MIT license

(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'; // reset classname in case of dynamic gravity
 $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.$element[0].parentNode) {
 this.hide();
 this.$element = null;
 this.options = null;
 }
 },

 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: 's',
 html: true,
 live: false,
 offset: 0,
 opacity: 0.8,
 title: 'title',
 trigger: 'hover'
 };

 // Overwrite this method to provide options on a per-element basis.
 // For example, you could store the gravity in a 'tipsy-gravity' attribute:
 // return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' });
 // (remember - do not modify 'options' in place!)
 $.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);