/**
* jQuery.ScrollTo
* Copyright (c) 2008 Ariel Flesler - aflesler(at)gmail(dot)com | http://flesler.blogspot.com
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
* Date: 2/19/2008
*
* @projectDescription Easy element scrolling using jQuery.
* Tested with jQuery 1.2.1. On FF 2.0.0.11, IE 6, Opera 9.22 and Safari 3 beta. on Windows.
*
* @author Ariel Flesler
* @version 1.3.3
*
* @id jQuery.scrollTo
* @id jQuery.fn.scrollTo
* @param {String, Number, DOMElement, jQuery, Object} target Where to scroll the matched elements.
*	  The different options for target are:
*		- A number position (will be applied to all axes).
*		- A string position ('44', '100px', '+=90', etc ) will be applied to all axes
*		- A jQuery/DOM element ( logically, child of the element to scroll )
*		- A string selector, that will be relative to the element to scroll ( 'li:eq(2)', etc )
*		- A hash { top:x, left:y }, x and y can be any kind of number/string like above.
* @param {Number} duration The OVERALL length of the animation, this argument can be the settings object instead.
* @param {Object} settings Hash of settings, optional.
*	 @option {String} axis Which axis must be scrolled, use 'x', 'y', 'xy' or 'yx'.
*	 @option {Number} duration The OVERALL length of the animation.
*	 @option {String} easing The easing method for the animation.
*	 @option {Boolean} margin If true, the margin of the target element will be deducted from the final position.
*	 @option {Object, Number} offset Add/deduct from the end position. One number for both axes or { top:x, left:y }.
*	 @option {Object, Number} over Add/deduct the height/width multiplied by 'over', can be { top:x, left:y } when using both axes.
*	 @option {Boolean} queue If true, and both axis are given, the 2nd axis will only be animated after the first one ends.
*	 @option {Function} onAfter Function to be called after the scrolling ends. 
*	 @option {Function} onAfterFirst If queuing is activated, this function will be called after the first scrolling ends.
* @return {jQuery} Returns the same jQuery object, for chaining.
*
* @example $('div').scrollTo( 340 );
*
* @example $('div').scrollTo( '+=340px', { axis:'y' } );
*
* @example $('div').scrollTo( 'p.paragraph:eq(2)', 500, { easing:'swing', queue:true, axis:'xy' } );
*
* @example var second_child = document.getElementById('container').firstChild.nextSibling;
*			$('#container').scrollTo( second_child, { duration:500, axis:'x', onAfter:function(){
*				alert('scrolled!!');																   
*			}});
*
* @example $('div').scrollTo( { top: 300, left:'+=200' }, { offset:-20 } );
*
* Notes:
*  - jQuery.scrollTo will make the whole window scroll, it accepts the same arguments as jQuery.fn.scrollTo.
*	- If you are interested in animated anchor navigation, check http://jquery.com/plugins/project/LocalScroll.
*	- The options margin, offset and over are ignored, if the target is not a jQuery object or a DOM element.
*	- The option 'queue' won't be taken into account, if only 1 axis is given.
*/
; (function($) {

    var $scrollTo = $.scrollTo = function(target, duration, settings) {
        $scrollTo.window().scrollTo(target, duration, settings);
    };

    $scrollTo.defaults = {
        axis: 'y',
        duration: 1
    };

    //returns the element that needs to be animated to scroll the window
    $scrollTo.window = function() {
        return $($.browser.safari ? 'body' : 'html');
    };

    $.fn.scrollTo = function(target, duration, settings) {
        if (typeof duration == 'object') {
            settings = duration;
            duration = 0;
        }
        settings = $.extend({}, $scrollTo.defaults, settings);
        duration = duration || settings.speed || settings.duration; //speed is still recognized for backwards compatibility
        settings.queue = settings.queue && settings.axis.length > 1; //make sure the settings are given right
        if (settings.queue)
            duration /= 2; //let's keep the overall speed, the same.
        settings.offset = both(settings.offset);
        settings.over = both(settings.over);

        return this.each(function() {
            var elem = this, $elem = $(elem),
				t = target, toff, attr = {},
				win = $elem.is('html,body');
            switch (typeof t) {
                case 'number': //will pass the regex
                case 'string':
                    if (/^([+-]=)?\d+(px)?$/.test(t)) {
                        t = both(t);
                        break; //we are done
                    }
                    t = $(t, this); // relative selector, no break!
                case 'object':
                    if (t.is || t.style)//DOM/jQuery
                        toff = (t = $(t)).offset(); //get the real position of the target 
            }
            $.each(settings.axis.split(''), function(i, axis) {
                var Pos = axis == 'x' ? 'Left' : 'Top',
					pos = Pos.toLowerCase(),
					key = 'scroll' + Pos,
					act = elem[key],
					Dim = axis == 'x' ? 'Width' : 'Height',
					dim = Dim.toLowerCase();

                if (toff) {//jQuery/DOM
                    attr[key] = toff[pos] + (win ? 0 : act - $elem.offset()[pos]);

                    if (settings.margin) {//if it's a dom element, reduce the margin
                        attr[key] -= parseInt(t.css('margin' + Pos)) || 0;
                        attr[key] -= parseInt(t.css('border' + Pos + 'Width')) || 0;
                    }

                    attr[key] += settings.offset[pos] || 0; //add/deduct the offset

                    if (settings.over[pos])//scroll to a fraction of its width/height
                        attr[key] += t[dim]() * settings.over[pos];
                } else
                    attr[key] = t[pos]; //remove the unnecesary 'px'

                if (/^\d+$/.test(attr[key]))//number or 'number'
                    attr[key] = attr[key] <= 0 ? 0 : Math.min(attr[key], max(Dim)); //check the limits

                if (!i && settings.queue) {//queueing each axis is required					
                    if (act != attr[key])//don't waste time animating, if there's no need.
                        animate(settings.onAfterFirst); //intermediate animation
                    delete attr[key]; //don't animate this axis again in the next iteration.
                }
            });
            animate(settings.onAfter);

            function animate(callback) {
                $elem.animate(attr, duration, settings.easing, callback && function() {
                    callback.call(this, target);
                });
            };
            function max(Dim) {
                var el = win ? $.browser.opera ? document.body : document.documentElement : elem;
                return el['scroll' + Dim] - el['client' + Dim];
            };
        });
    };

    function both(val) {
        return typeof val == 'object' ? val : { top: val, left: val };
    };

})(jQuery);

/**
* jQuery.serialScroll
* Copyright (c) 2007-2008 Ariel Flesler - aflesler(at)gmail(dot)com | http://flesler.blogspot.com
* Dual licensed under MIT and GPL.
* Date: 3/20/2008
*
* @projectDescription Animated scrolling of series.
* @author Ariel Flesler
* @version 1.2.1
*
* @id jQuery.serialScroll
* @id jQuery.fn.serialScroll
* @param {Object} settings Hash of settings, it is passed in to jQuery.ScrollTo, none is required.
* @return {jQuery} Returns the same jQuery object, for chaining.
*
* http://flesler.blogspot.com/2008/02/jqueryserialscroll.html
*
* Notes:
*	- The plugin requires jQuery.ScrollTo.
*	- The hash of settings, is passed to jQuery.ScrollTo, so its settings can be used as well.
*/
; (function($) {

    var $serialScroll = $.serialScroll = function(settings) {
        $.scrollTo.window().serialScroll(settings);
    };

    //Many of these defaults, belong to jQuery.ScrollTo, check it's demo for an example of each option.
    //@see http://flesler.webs/jQuery.ScrollTo/
    $serialScroll.defaults = {//the defaults are public and can be overriden.
        duration: 1000, //how long to animate.
        axis: 'x', //which of top and left should be scrolled
        event: 'click', //on which event to react.
        start: 0, //first element (zero-based index)
        step: 1, //how many elements to scroll on each action
        lock: true, //ignore events if already animating
        cycle: true, //cycle endlessly ( constant velocity )
        constant: true //use contant speed ?
        /*
        navigation:null,//if specified, it's a selector a collection of items to navigate the container
        target:null, //if specified, it's a selector to the element to be scrolled.
        interval:0, //it's the number of milliseconds to automatically go to the next
        lazy:false,//go find the elements each time (allows AJAX or JS content, or reordering)
        stop:false, //stop any previous animations to avoid queueing
        force:false,//force the scroll to the first element on start ?
        jump: false,//if true, when the event is triggered on an element, the pane scrolls to it
        items:null, //selector to the items (relative to the matched elements)
        prev:null, //selector to the 'prev' button
        next:null, //selector to the 'next' button
        onBefore: function(){}, //function called before scrolling, if it returns false, the event is ignored
        exclude:0 //exclude the last x elements, so we cannot scroll past the end
        */
    };

    $.fn.serialScroll = function(settings) {
        settings = $.extend({}, $serialScroll.defaults, settings);
        var event = settings.event, //this one is just to get shorter code when compressed
			step = settings.step, // idem
			lazy = settings.lazy; //idem

        return this.each(function() {
            var 
				context = settings.target ? this : document, //if a target is specified, then everything's relative to 'this'.
				$pane = $(settings.target || this, context), //the element to be scrolled (will carry all the events)
				pane = $pane[0], //will be reused, save it into a variable
				items = settings.items, //will hold a lazy list of elements
				active = settings.start, //active index
				auto = settings.interval, //boolean, do auto or not
				nav = settings.navigation, //save it now to make the code shorter
				timer; //holds the interval id

            if (!lazy)//if not lazy, go get the items now
                items = getItems();

            if (settings.force)
                jump({}, active); //generate an initial call

            // Button binding, optionall
            $(settings.prev || [], context).bind(event, -step, move);
            $(settings.next || [], context).bind(event, step, move);

            // Custom events bound to the container
            if (!pane.ssbound)//don't bind more than once
                $pane
					.bind('prev.serialScroll', -step, move) //you can trigger with just 'prev'
					.bind('next.serialScroll', step, move) //for example: $(container).trigger('next');
					.bind('goto.serialScroll', jump); //for example: $(container).trigger('goto', [4] );
            if (auto)
                $pane
					.bind('start.serialScroll', function(e) {
					    if (!auto) {
					        clear();
					        auto = true;
					        next();
					    }
					})
					.bind('stop.serialScroll', function() {//stop a current animation
					    clear();
					    auto = false;
					});
            $pane.bind('notify.serialScroll', function(e, elem) {//let serialScroll know that the index changed externally
                var i = index(elem);
                if (i > -1)
                    active = i;
            });
            pane.ssbound = true; //avoid many bindings

            if (settings.jump)//can't use jump if using lazy items and a non-bubbling event
                (lazy ? $pane : getItems()).bind(event, function(e) {
                    jump(e, index(e.target));
                });

            if (nav)
                nav = $(nav, context).bind(event, function(e) {
                    e.data = Math.round(getItems().length / nav.length) * nav.index(this);
                    jump(e, this);
                });

            function move(e) {
                e.data += active;
                jump(e, this);
            };
            function jump(e, button) {
                if (!isNaN(button)) {//initial or special call from the outside $(container).trigger('goto',[index]);
                    e.data = button;
                    button = pane;
                }

                var 
					pos = e.data, n,
					real = e.type, //is a real event triggering ?
					$items = settings.exclude ? getItems().slice(0, -settings.exclude) : getItems(), //handle a possible exclude
					limit = $items.length,
					elem = $items[pos],
					duration = settings.duration;

                if (real)//real event object
                    e.preventDefault();

                if (auto) {
                    clear(); //clear any possible automatic scrolling.
                    timer = setTimeout(next, settings.interval);
                }

                if (!elem) { //exceeded the limits
                    n = pos < 0 ? 0 : limit - 1;
                    if (active != n)//we exceeded for the first time
                        pos = n;
                    else if (!settings.cycle)//this is a bad case
                        return;
                    else
                        pos = limit - n - 1; //invert, go to the other side
                    elem = $items[pos];
                }

                if (!elem || real && active == pos || //could happen, save some CPU cycles in vain
					settings.lock && $pane.is(':animated') || //no animations while busy
					real && settings.onBefore && //callback returns false ?
					settings.onBefore.call(button, e, elem, $pane, getItems(), pos) === false) return;

                if (settings.stop)
                    $pane.queue('fx', []).stop(); //remove all its animations

                if (settings.constant)
                    duration = Math.abs(duration / step * (active - pos)); //keep constant velocity

                $pane
					.scrollTo(elem, duration, settings)//do scroll
					.trigger('notify.serialScroll', [pos]); //in case serialScroll was called on this elem more than once.
            };
            function next() {//I'll use the namespace to avoid conflicts
                $pane.trigger('next.serialScroll');
            };
            function clear() {
                clearTimeout(timer);
            };
            function getItems() {
                return $(items, pane);
            };
            function index(elem) {
                if (!isNaN(elem)) return elem; //number
                var $items = getItems(), i;
                while ((i = $items.index(elem)) == -1 && elem != pane)//see if it matches or one of its ancestors
                    elem = elem.parentNode;
                return i;
            };
        });
    };

})(jQuery);

// when the DOM is ready...
$(document).ready(function() {

    var $panels = $('#slider .scrollContainer > div');
    var $container = $('#slider .scrollContainer');

    // if false, we'll float all the panels left and fix the width 
    // of the container
    var horizontal = true;

    // float the panels left if we're going horizontal
    if (horizontal) {
        $panels.css({
            'float': 'left',
            'position': 'relative' // IE fix to ensure overflow is hidden
        });

        // calculate a new width for the container (so it holds all panels)
        //$container.css('width', $panels[0].offsetWidth * $panels.length);
    }

    // collect the scroll object, at the same time apply the hidden overflow
    // to remove the default scrollbars that will appear
    var $scroll = $('#slider .scroll').css('overflow', 'hidden');

    // apply our left + right buttons
//    $scroll
//        .before('<img class="scrollButtons left" src="images/scroll_left.png" />')
//        .after('<img class="scrollButtons right" src="images/scroll_right.png" />');

    // handle nav selection
    function selectNav() {
        $(this)
            .parents('ul:first')
                .find('a')
                    .removeClass('selected')
                .end()
            .end()
            .addClass('selected');
    }

    $('#slider .navigation').find('a').click(selectNav);

    // go find the navigation link that has this target and select the nav
    function trigger(data) {
        var el = $('#slider .navigation').find('a[href$="' + data.id + '"]').get(0);
        selectNav.call(el);
    }

    if (window.location.hash) {
        trigger({ id: window.location.hash.substr(1) });
    } else {
        $('ul.navigation a:first').click();
    }

    // offset is used to move to *exactly* the right place, since I'm using
    // padding on my example, I need to subtract the amount of padding to
    // the offset.  Try removing this to get a good idea of the effect
    var offset = parseInt((horizontal ?
        $container.css('paddingTop') :
        $container.css('paddingLeft'))
        || 0) * -1;


    var scrollOptions = {
        target: $scroll, // the element that has the overflow

        // can be a selector which will be relative to the target
        items: $panels,

        navigation: '.navigation a',

        // selectors are NOT relative to document, i.e. make sure they're unique
        prev: 'img.left',
        next: 'img.right',

        // allow the scroll effect to run both directions
        axis: 'xy',

        onAfter: trigger, // our final callback

        offset: offset,

        // duration of the sliding effect
        duration: 500,

        // easing - can be used with the easing plugin: 
        // http://gsgd.co.uk/sandbox/jquery/easing/
        easing: 'swing'
    };

    // apply serialScroll to the slider - we chose this plugin because it 
    // supports// the indexed next and previous scroll along with hooking 
    // in to our navigation.
    $('#slider').serialScroll(scrollOptions);

    // now apply localScroll to hook any other arbitrary links to trigger 
    // the effect
//    $.localScroll(scrollOptions);

//    // finally, if the URL has a hash, move the slider in to position, 
//    // setting the duration to 1 because I don't want it to scroll in the
//    // very first page load.  We don't always need this, but it ensures
//    // the positioning is absolutely spot on when the pages loads.
//    scrollOptions.duration = 1;
//    $.localScroll.hash(scrollOptions);

});