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

(function($) {

    function fixMiniTitle($ele) {
        if ($ele.attr('minititle') || typeof($ele.attr('original-minititle')) != 'string') {
            $ele.attr('original-minititle', $ele.attr('minititle') || '').removeAttr('minititle');
        }
    }

    function miniTipsy(element, options) {
        this.$element = $(element);
        this.options = options;
        this.enabled = true;
        fixMiniTitle(this.$element);
    }

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

                $tip.find('.minitipsy-inner')[this.options.html ? 'html' : 'text'](minititle);
                $tip[0].className = 'minitipsy'; // 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('minitipsy-' + 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 minititle, $e = this.$element, o = this.options;
            fixMiniTitle($e);
            var minititle, o = this.options;
            if (typeof o.minititle == 'string') {
                minititle = $e.attr(o.minititle == 'minititle' ? 'original-minititle' : o.minititle);
            } else if (typeof o.minititle == 'function') {
                minititle = o.minititle.call($e[0]);
            }
            minititle = ('' + minititle).replace(/(^\s*|\s*$)/, "");
            return minititle || o.fallback;
        },

        tip: function() {
            if (!this.$tip) {
                this.$tip = $('<div class="minitipsy" ></div>').html('<div class="minitipsy-arrow"></div><div class="minitipsy-inner"></div>');
            }
            return this.$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.minitipsy = function(options) {

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

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

        function get(ele) {
            var minitipsy = $.data(ele, 'minitipsy');
            if (!minitipsy) {
                minitipsy = new miniTipsy(ele, $.fn.minitipsy.elementOptions(ele, options));
                $.data(ele, 'minitipsy', minitipsy);
            }
            return minitipsy;
        }

        function enter() {
            var minitipsy = get(this);
            minitipsy.hoverState = 'in';
            if (options.delayIn == 0) {
                minitipsy.show();
            } else {
                setTimeout(function() { if (minitipsy.hoverState == 'in') minitipsy.show(); }, options.delayIn);
            }
        };

        function leave() {
            var minitipsy = get(this);
            minitipsy.hoverState = 'out';
            if (options.delayOut == 0) {
                minitipsy.hide();
            } else {
                setTimeout(function() { if (minitipsy.hoverState == 'out') minitipsy.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.minitipsy.defaults = {
        delayIn: 0,
        delayOut: 0,
        fade: false,
        fallback: '',
        gravity: 'n',
        html: false,
        live: false,
        offset: 0,
        opacity: 0.8,
        minititle: 'minititle',
        trigger: 'hover'
    };

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

    $.fn.minitipsy.autoNS = function() {
        return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
    };

    $.fn.minitipsy.autoWE = function() {
        return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
    };

})(jQuery);