/**
 * Galleria (http://monc.se/kitchen)
 *
 * Galleria is a javascript image gallery written in jQuery. 
 * It loads the images one by one from an unordered list and displays thumbnails when each image is loaded. 
 * It will create thumbnails for you if you choose so, scaled or unscaled, 
 * centered and cropped inside a fixed thumbnail box defined by CSS.
 * 
 * The core of Galleria lies in it's smart preloading behaviour, snappiness and the fresh absence 
 * of obtrusive design elements. Use it as a foundation for your custom styled image gallery.
 *
 * MAJOR CHANGES v.FROM 0.9
 * Galleria now features a useful history extension, enabling back button and bookmarking for each image.
 * The main image is no longer stored inside each list item, instead it is placed inside a container
 * onImage and onThumb functions lets you customize the behaviours of the images on the site
 *
 * Tested in Safari 3, Firefox 2, MSIE 6, MSIE 7, Opera 9
 * 
 * Version 1.0
 * Februari 21, 2008
 *
 * Copyright (c) 2008 David Hellsing (http://monc.se)
 * Licensed under the GPL licenses.
 * http://www.gnu.org/licenses/gpl.txt
 **/
;
(function($) {

    var $$;

    /**
 * 
 * @desc Convert images from a simple html <ul> into a thumbnail gallery
 * @author David Hellsing
 * @version 1.0
 *
 * @name Galleria
 * @type jQuery
 *
 * @cat plugins/Media
 * 
 * @example $('ul.gallery').galleria({options});
 * @desc Create a a gallery from an unordered list of images with thumbnails
 * @options
 *   insert:   (selector string) by default, Galleria will create a container div before your ul that holds the image.
 *             You can, however, specify a selector where the image will be placed instead (f.ex '#main_img')
 *   history:  Boolean for setting the history object in action with enabled back button, bookmarking etc.
 *   onImage:  (function) a function that gets fired when the image is displayed and brings the jQuery image object.
 *             You can use it to add click functionality and effects.
 *             f.ex onImage(image) { image.css('display','none').fadeIn(); } will fadeIn each image that is displayed
 *   onThumb:  (function) a function that gets fired when the thumbnail is displayed and brings the jQuery thumb object.
 *             Works the same as onImage except it targets the thumbnail after it's loaded.
 *
**/

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

        // check for basic CSS support
        if (!$$.hasCSS()) {
            return false;
        }

        // init the modified history object
        $.historyInit($$.onPageLoad);

        // set default options
        var $defaults = {
            insert: '.galleria_container',
            history: true,
            clickNext: true,
            onImage: function(image, caption, thumb) {},
            onThumb: function(thumb) {}
        };

        // extend the options
        var $opts = $.extend($defaults, $options);

        // bring the options to the galleria object
        for (var i in $opts) {
            $.galleria[i] = $opts[i];
        }

        // if no insert selector, create a new division and insert it before the ul
        var _insert = ($($opts.insert).is($opts.insert)) ? $($opts.insert) : jQuery(document.createElement('div')).insertBefore(this);

        // create a wrapping div for the image
        var _div = $(document.createElement('div')).addClass('galleria_wrapper');

        // create a caption span
        var _span = $(document.createElement('span')).addClass('caption');

        // inject the wrapper in in the insert selector
        _insert.addClass('galleria_container').append(_div).append(_span);

        //-------------
        return this.each(function() {

            // add the Galleria class
            $(this).addClass('galleria');

            // loop through list
            $(this).children('li').each(function(i) {

                // bring the scope
                var _container = $(this);

                // build element specific options
                var _o = $.meta ? $.extend({},
                $opts, _container.data()) : $opts;

                // remove the clickNext if image is only child
                _o.clickNext = $(this).is(':only-child') ? false : _o.clickNext;

                // try to fetch an anchor
                var _a = $(this).find('a').is('a') ? $(this).find('a') : false;

                // reference the original image as a variable and hide it
                var _img = $(this).children('img').css('display', 'none');

                // extract the original source
                var _src = _a ? _a.attr('href') : _img.attr('src');

                var _rel = _img.attr('rel');

                // find a title
                var _title = _a ? _a.attr('title') : _img.attr('title');

                // create loader image            
                var _loader = new Image();

                // check url and activate container if match
                if (_o.history && (window.location.hash && window.location.hash.replace(/\#/, '') == _src)) {
                    _container.siblings('.active').removeClass('active');
                    _container.addClass('active');
                }

                // begin loader
                $(_loader).load(function() {

                    // try to bring the alt
                    $(this).attr('alt', _img.attr('alt'));

                    //----------------------------------------------------------
                    // the image is loaded, let's create the thumbnail
                    var _thumb = _a ? _a.find('img').addClass('thumb noscale').css('display', 'none') : _img.clone(true).addClass('thumb').css('display', 'none');

                    if (_a) {
                        _a.replaceWith(_thumb);
                    }

                    if (!_thumb.hasClass('noscale')) { // scaled tumbnails!
                        var w = Math.ceil(_img.width() / _img.height() * _container.height());
                        var h = Math.ceil(_img.height() / _img.width() * _container.width());
                        if (w < h) {
                            _thumb.css({
                                height: 'auto',
                                width: _container.width(),
                                marginTop: -(h - _container.height()) / 2
                            });
                        } else {
                            _thumb.css({
                                width: 'auto',
                                height: _container.height(),
                                marginLeft: -(w - _container.width()) / 2
                            });
                        }
                    } else { // Center thumbnails.
                        // a tiny timer fixed the width/height
                        window.setTimeout(function() {
                            _thumb.css({
                                marginLeft: -(_thumb.width() - _container.width()) / 2,
                                marginTop: -(_thumb.height() - _container.height()) / 2
                            });
                        },
                        1);
                    }

                    // add the rel attribute //Hack para la galeria de la web
                    //_thumb.attr('rel', _src);

                    // add the title attribute
                    _thumb.attr('title', _title);

                    // add the click functionality to the _thumb
                    _thumb.click(function() {
                        $.galleria.activate(_rel);
                    });

                    // hover classes for IE6
                    _thumb.hover(
                    function() {
                        $(this).addClass('hover');
                    },
                    function() {
                        $(this).removeClass('hover');
                    });
                    _container.hover(
                    function() {
                        _container.addClass('hover');
                    },
                    function() {
                        _container.removeClass('hover');
                    });

                    // prepend the thumbnail in the container
                    _container.prepend(_thumb);

                    // show the thumbnail
                    _thumb.css('display', 'block');

                    // call the onThumb function
                    _o.onThumb(jQuery(_thumb));

                    // check active class and activate image if match
                    if (_container.hasClass('active')) {
                        $.galleria.activate(_rel);
                        //_span.text(_title);
                    }

                    //-----------------------------------------------------------------
                    // finally delete the original image
                    _img.remove();

                }).error(function() {
                    // Error handling
                    _container.html('<span class="error" style="color:red">Error loading image: ' + _src + '</span>');
                }).attr('src', _src);
            });
        });
    };

    /**
 *
 * @name NextSelector
 *
 * @desc Returns the sibling sibling, or the first one
 *
**/

    $$.nextSelector = function(selector) {
        return $(selector).is(':last-child') ? $(selector).siblings(':first-child') : $(selector).next();
    };

    /**
 *
 * @name previousSelector
 *
 * @desc Returns the previous sibling, or the last one
 *
**/

    $$.previousSelector = function(selector) {
        return $(selector).is(':first-child') ? $(selector).siblings(':last-child') : $(selector).prev();
    };

    /**
 *
 * @name hasCSS
 *
 * @desc Checks for CSS support and returns a boolean value
 *
**/

    $$.hasCSS = function() {
        $('body').append(
        $(document.createElement('div')).attr('id', 'css_test').css({
            width: '1px',
            height: '1px',
            display: 'none'
        }));
        var _v = ($('#css_test').width() != 1) ? false : true;
        $('#css_test').remove();
        return _v;
    };

    /**
 *
 * @name onPageLoad
 *
 * @desc The function that displays the image and alters the active classes
 *
 * Note: This function gets called when:
 * 1. after calling $.historyInit();
 * 2. after calling $.historyLoad();
 * 3. after pushing "Go Back" button of a browser
 *
**/

    $$.onPageLoad = function(_src) {
        // get the wrapper
        var _wrapper = $('.galleria_wrapper');

        // get the thumb
        var _thumb = $('.galleria img[@rel="' + _src + '"]');

        if (_src) {
            // new hash location
            if ($.galleria.history) {
                window.location = window.location.href.replace(/\#.*/, '') + '#' + _src;
            }

            // alter the active classes
            _thumb.parents('li').siblings('.active').removeClass('active');
            _thumb.parents('li').addClass('active');

            // define a new image
            var _img = $(new Image()).attr('src', _src).addClass('replaced');

            // empty the wrapper and insert the new image
            _wrapper.empty().append(_img);

            // insert the caption
            _wrapper.siblings('.caption').text(_thumb.attr('title'));

            // fire the onImage function to customize the loaded image's features
            $.galleria.onImage(_img, _wrapper.siblings('.caption'), _thumb);

            // add clickable image helper
            if ($.galleria.clickNext) {
                _img.css('cursor', 'pointer').click(function() {
                    $.galleria.next();
                })
            }
        } else {
            // clean up the container if none are active
            _wrapper.siblings().andSelf().empty();

            // remove active classes
            $('.galleria li.active').removeClass('active');
        }

        // place the source in the galleria.current variable
        $.galleria.current = _src;
    }

    /**
 *
 * @name jQuery.galleria
 *
 * @desc The global galleria object holds four constant variables and four public methods:
 *       $.galleria.history = a boolean for setting the history object in action with named URLs
 *       $.galleria.current = is the current source that's being viewed.
 *       $.galleria.clickNext = boolean helper for adding a clickable image that leads to the next one in line
 *       $.galleria.next() = displays the next image in line, returns to first image after the last.
 *       $.galleria.prev() = displays the previous image in line, returns to last image after the first.
 *       $.galleria.activate(_src) = displays an image from _src in the galleria container.
 *       $.galleria.onImage(image,caption) = gets fired when the image is displayed.
 *
**/

    $.extend({
        galleria: {
            current: '',
            onImage: function() {},
            activate: function(_src) {
                if ($.galleria.history) {
                    $.historyLoad(_src);
                } else {
                    $$.onPageLoad(_src);
                }
            },
            next: function() {
                var _next = $($$.nextSelector($('.galleria img[@rel="' + $.galleria.current + '"]').parents('li'))).find('img').attr('rel');
                $.galleria.activate(_next);
            },
            prev: function() {
                var _prev = $($$.previousSelector($('.galleria img[@rel="' + $.galleria.current + '"]').parents('li'))).find('img').attr('rel');
                $.galleria.activate(_prev);
            }
        }
    });
})(jQuery);
/**
 *
 * Packed history extension for jQuery
 * Credits to http://www.mikage.to/
 *
**/
jQuery.extend({
    historyCurrentHash: undefined,
    historyCallback: undefined,
    historyInit: function(callback) {
        jQuery.historyCallback = callback;
        var current_hash = location.hash;
        jQuery.historyCurrentHash = current_hash;
        if (jQuery.browser.msie) {
            if (jQuery.historyCurrentHash == '') {
                jQuery.historyCurrentHash = '#'
            }
            $("body").prepend('<iframe id="jQuery_history" style="display: none;"></iframe>');
            var ihistory = $("#jQuery_history")[0];
            var iframe = ihistory.contentWindow.document;
            iframe.open();
            iframe.close();
            iframe.location.hash = current_hash
        } else if ($.browser.safari) {
            jQuery.historyBackStack = [];
            jQuery.historyBackStack.length = history.length;
            jQuery.historyForwardStack = [];
            jQuery.isFirst = true
        }
        jQuery.historyCallback(current_hash.replace(/^#/, ''));
        setInterval(jQuery.historyCheck, 100)
    },
    historyAddHistory: function(hash) {
        jQuery.historyBackStack.push(hash);
        jQuery.historyForwardStack.length = 0;
        this.isFirst = true
    },
    historyCheck: function() {
        if (jQuery.browser.msie) {
            var ihistory = $("#jQuery_history")[0];
            var iframe = ihistory.contentDocument || ihistory.contentWindow.document;
            var current_hash = iframe.location.hash;
            if (current_hash != jQuery.historyCurrentHash) {
                location.hash = current_hash;
                jQuery.historyCurrentHash = current_hash;
                jQuery.historyCallback(current_hash.replace(/^#/, ''))
            }
        } else if ($.browser.safari) {
            if (!jQuery.dontCheck) {
                var historyDelta = history.length - jQuery.historyBackStack.length;
                if (historyDelta) {
                    jQuery.isFirst = false;
                    if (historyDelta < 0) {
                        for (var i = 0; i < Math.abs(historyDelta); i++) jQuery.historyForwardStack.unshift(jQuery.historyBackStack.pop())
                    } else {
                        for (var i = 0; i < historyDelta; i++) jQuery.historyBackStack.push(jQuery.historyForwardStack.shift())
                    }
                    var cachedHash = jQuery.historyBackStack[jQuery.historyBackStack.length - 1];
                    if (cachedHash != undefined) {
                        jQuery.historyCurrentHash = location.hash;
                        jQuery.historyCallback(cachedHash)
                    }
                } else if (jQuery.historyBackStack[jQuery.historyBackStack.length - 1] == undefined && !jQuery.isFirst) {
                    if (document.URL.indexOf('#') >= 0) {
                        jQuery.historyCallback(document.URL.split('#')[1])
                    } else {
                        var current_hash = location.hash;
                        jQuery.historyCallback('')
                    }
                    jQuery.isFirst = true
                }
            }
        } else {
            var current_hash = location.hash;
            if (current_hash != jQuery.historyCurrentHash) {
                jQuery.historyCurrentHash = current_hash;
                jQuery.historyCallback(current_hash.replace(/^#/, ''))
            }
        }
    },
    historyLoad: function(hash) {
        var newhash;
        if (jQuery.browser.safari) {
            newhash = hash
        } else {
            newhash = '#' + hash;
            location.hash = newhash
        }
        jQuery.historyCurrentHash = newhash;
        if (jQuery.browser.msie) {
            var ihistory = $("#jQuery_history")[0];
            var iframe = ihistory.contentWindow.document;
            iframe.open();
            iframe.close();
            iframe.location.hash = newhash;
            jQuery.historyCallback(hash)
        } else if (jQuery.browser.safari) {
            jQuery.dontCheck = true;
            this.historyAddHistory(hash);
            var fn = function() {
                jQuery.dontCheck = false
            };
            window.setTimeout(fn, 200);
            jQuery.historyCallback(hash);
            location.hash = newhash
        } else {
            jQuery.historyCallback(hash)
        }
    }
});