//The MIT License
//
//Copyright (c) 2008 Jason Frame (jason@onehackoranother.com)
//
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in
//all copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//THE SOFTWARE. 



(function($) {
    $.fn.tipsy = function(options) {

        options = $.extend({}, $.fn.tipsy.defaults, options);
        
        return this.each(function() {
            
            var opts = $.fn.tipsy.elementOptions(this, options);
            
            if ($(this).attr('title')) { // Pridano, aby se zobrazovalo jen kdyz je neco v title.
            
                $(this).hover(function() {

                    $.data(this, 'cancel.tipsy', true);

                    var tip = $.data(this, 'active.tipsy');
                    if (!tip) {
                        tip = $('<div class="tipsy"><div class="tipsy-inner"/></div>');
                        tip.css({position: 'absolute', zIndex: 100000});
                        $.data(this, 'active.tipsy', tip);
                    }

                    if ($(this).attr('title') || typeof($(this).attr('original-title')) != 'string') {
                        $(this).attr('original-title', $(this).attr('title') || '').removeAttr('title');
                    }

                    var title;
                    if (typeof opts.title == 'string') {
                        title = $(this).attr(opts.title == 'title' ? 'original-title' : opts.title);
                    } else if (typeof opts.title == 'function') {
                        title = opts.title.call(this);
                    }

                    tip.find('.tipsy-inner')[opts.html ? 'html' : 'text'](title || opts.fallback);

                    var pos = $.extend({}, $(this).offset(), {width: this.offsetWidth, height: this.offsetHeight});
                    tip.get(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 actualWidth = tip[0].offsetWidth, actualHeight = tip[0].offsetHeight;
                    var gravity = (typeof opts.gravity == 'function') ? opts.gravity.call(this) : opts.gravity;

                    switch (gravity.charAt(0)) {
                        case 'n':
                            tip.css({top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-north');
                            break;
                        case 's':
                            tip.css({top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-south');
                            break;
                        case 'e':
                            tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}).addClass('tipsy-east');
                            break;
                        case 'w':
                            tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}).addClass('tipsy-west');
                            break;
                    }

                    if (opts.fade) {
                        tip.css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: 0.8});
                    } else {
                        tip.css({visibility: 'visible'});
                    }

                }, function() {
                    $.data(this, 'cancel.tipsy', false);
                    var self = this;
                    setTimeout(function() {
                        if ($.data(this, 'cancel.tipsy')) return;
                        var tip = $.data(self, 'active.tipsy');
                        if (opts.fade) {
                            tip.stop().fadeOut(function() { $(this).remove(); });
                        } else {
                            tip.remove();
                        }
                    }, 100);

                });
            
            }
            
        });
        
    };
    
    // 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.defaults = {
        fade: false,
        fallback: '',
        gravity: 'n',
        html: false,
        title: 'title'
    };
    
    $.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);