/*
* jQuery FlyOut
* author: Jolyon Terwilliger - Nixbox Web Designs
* website: http://nixboxdesigns.com/jquery.flyout.php
*
* Dual licensed under the MIT and GPL licenses:
*   http://www.opensource.org/licenses/mit-license.php
*   http://www.gnu.org/licenses/gpl.html
*
* version 0.21 (July 21, 2008)
* version 0.22 (July 22, 2008) 
notes: minor reordering to loadingSrc logic.
* version 0.23 (August 15, 2008) 
added: config options for loadingText and closeTip to facilitate locale.
Thanks Tony for the nudge.
* version 0.24 (Oct 2, 2008) 
added: customize start location and size of flyout, if different 
from thumb link. Thanks to Jake Kronika for this patch.
* version 1.0 (Oct 11, 2008) 
added: support for final flyout location via destElement and destPadding: 
define a fixed container anywhere in the document and the pic will 
fly to that location, regardless of viewport position. 
fixed: clicking on open source link no longer reopens same image. 
added: 4 callbacks for start and finish of flyOut and putAway animations. 
fixed: putAway function to put back to correct location, in case 
thumb has moved (page or div scroll, etc)
* version 1.1 (Nov 16, 2008)
fixed: Opera 9.5+ doesn't report window.height() correctly - patched with code
from jquery Bug 3117:  http://dev.jquery.com/ticket/3117
note: once this is patched in jQuery core, or fixed in Opera
this may eventually be removed.
added: when flyOut image is completed, a customizable class 
(default to 'shown') is appended to the thumb image container
so an external event can trigger the click to close any open
elements. See demo page for example.
*/

/**
* The flyout() method provides an alternate means of loading and display sub-content
* with a nifty flyout animation technique.
* Currently, flyout only supports img sub-content.
*
* flyout() takes a single object argument:  $().flyout({param:setting, etc..})
*
* Settings:
*
*			outSpeed:	speed in milliseconds for the flyout animation - default: 1000
*
*			inSpeed:	speed in milliseconds for the flyback animation - default: 500
*
*			outEase:	the easing method to use for the flyout animation - default: swing
*
*			inEase:		the easing method to use for the flyback animation - default: swing
*			
*			loadingSrc: the image file to use while an image is being loaded prior to flyout
*						default: none
*						
*			loader: 	the ID for the created flyout div that contains the sub-content
*						this is currently only useful for multiple skinnings via CSS
*						default: 'loader'
*
*			loaderZIndex: the CSS z-index for the flyout
*						default: 500
*
*			widthMargin: the left and right margin space for the final flyout
*						this value is effectively divided between the left and right margin
*						default: 40
*			
*			heightMargin: the top and bottom margin space for the final flyout
*						this value is effectively divided between the top and bottom margin
*						default: 40
*
*			loadingText: text shown when image is loading
*
*			closeTip: tip text for image alt/title tags
*
*			destElement: the destination container - overrides height and widthMargins
*						specified in CSS notation - e.g. "#picContainer"
*						default: none
*
*			destPadding: number of pixels to pad when flying out to destElement
*						default: 10
*
*			startOffsetX: horizontal offset added to thumb left value for start of flyout animation
*						Hint: can be negative.
*						default: 0
*
*			startOffsetY: vertical offset added to thumb top value for start of flyout animation.
*						default: 0
*
*			startHeight: overrides starting height of flyout animation
*						default: 0  (uses thumb image height by default)
*
*			startWidth: overrides starting width of flyout animation
*						default: 0  (uses thumb image width by default)
*
*			flyOutStart: function to run at start of flyout animation
*						default: none
*
*			flyOutFinish: function to run at finish of flyout animation
*						default: none
*
*			putAwayStart: function to run at start of putaway animation
*						default: none
*
*			putAwayFinish: function to run at finish of putaway animation
*						default: none
*
* For more details see: http://nixbox.com/demos/jquery.flyout.php
*
* @example $('.thumb').flyout();
* @desc standard flyouts applied to all elements with the 'thumbs' class. 
* 
* @example $('.thumb').flyout({loadingSrc:'images/thumb-loading.gif',
*								outEase:'easeOutCirc',
*								inEase:'easeOutBounce'});
* @desc flyouts created with different ease in and ease out and a loading animation image is specified
*
* @name flyout
* @type jQuery
* @param Object options Options which control the flyout animation and content
* @cat Plugins/Flyout
* @return jQuery
* @author Jolyon Terwilliger (jolyon@nixbox.com)
*/

$.fn.extend({ flyout: function(options) {

    var shown = false;
    var animating = false;
    var $holder;
    var $thumb;
    var tloc;
    var th;
    var tw;
    var bigimg = new Image();
    var subType = 'img';
    var offset;

    this.click(function() {
        if (animating == true) { return false; }

        if (shown) { putAway(this); }
        else { flyOut(this); }

        return false;
    });

    var o = jQuery.extend({
        outSpeed: 1000,
        inSpeed: 500,
        outEase: 'swing',
        inEase: 'swing',
        loadingSrc: null,
        loader: 'loader',
        loaderZIndex: 500,
        widthMargin: 40,
        heightMargin: 40,
        loadingText: "Loading...",
        closeTip: " - Click here to close",
        destPadding: 20,
        startOffsetX: 0,
        startOffsetY: 0,
        startHeight: 0,
        startWidth: 0,
        flyOutStart: function() { },
        flyOutFinish: function() { },
        putAwayStart: function() { },
        putAwayFinish: function() { },
        shownClass: 'shown'
    }, options);

    function flyOut(it) {
        animating = true;

        $holder = $(it);
        $thumb = $('img', it);
        bigimg = new Image();
        sL = $(window).scrollLeft();
        sT = $(window).scrollTop();
        tloc = $thumb.offset();
        tloc.left += o.startOffsetX;
        tloc.top += o.startOffsetY;
        th = (o.startHeight > 0 ? o.startHeight : $thumb.height());
        tw = (o.startWidth > 0 ? o.startWidth : $thumb.width());

        $('<div></div>').attr('id', o.loader)
							.appendTo('body')
							.css({ 'position': 'absolute',
							    'top': tloc.top,
							    'left': tloc.left,
							    'height': th,
							    'width': tw,
							    'opacity': .5,
							    'display': 'block',
							    'z-index': o.loaderZIndex
							});

        if (o.loadingSrc) {
            $('#' + o.loader).append($('<img/>')
								.load(function() {
								    $(this)
											.css({ 'position': 'relative',
											    'top': th / 2 - (this.height / 2),
											    'left': tw / 2 - (this.width / 2)
											})
											.attr('alt', o.loadingText);
								})
									.attr('src', o.loadingSrc)
								);
        }
        else {
            $('#' + o.loader).css('background-color', '#000')
								.append($('<span></span>')
										  	.text(o.loadingText)
											.css({ 'position': 'relative',
											    'top': '2px',
											    'left': '2px',
											    'color': '#FFF',
											    'font-size': '9px'
											})
									 	);
        }

        $(bigimg).load(function() {
            imgtag = $('<img/>').attr('src', $holder.attr('href')).attr('title', $thumb.attr('title') + o.closeTip).attr('alt', $thumb.attr('alt') + o.closeTip).height(th).width(tw);

            o.flyOutStart.call(it);

            if (o.destElement) {
                var $dest = $(o.destElement);
                max_x = $dest.innerWidth() - (o.destPadding * 2);
                max_y = $dest.innerHeight() - (o.destPadding * 2);
            }
            else {
                max_x = $(window).width() - o.widthMargin;
                if ($.browser.opera)
                    wh = document.getElementsByTagName('html')[0].clientHeight;
                else
                    wh = $(window).height();
                max_y = wh - o.heightMargin;
            }

            width = bigimg.width;
            height = bigimg.height;

            x_dim = max_x / width;
            y_dim = max_y / height;

            if (x_dim <= y_dim) {
                y_dim = x_dim;
            } else {
                x_dim = y_dim;
            }

            dw = Math.round(width * x_dim);
            dh = Math.round(height * y_dim);
            if (dw > width) { dw = width }
            if (dh > height) { dh = height }

            if (o.destElement) {
                dPos = $dest.offset();
                dl = Math.round(($dest.outerWidth() / 2) - (dw / 2) + dPos.left);
                dt = Math.round(($dest.outerHeight() / 2) - (dh / 2) + dPos.top);
            }
            else {
                dl = Math.round(($(window).width() / 2) - (dw / 2) + sL);
                if ($.browser.opera)
                    wh = document.getElementsByTagName('html')[0].clientHeight;
                else
                    wh = $(window).height();
                dt = Math.round((wh / 2) - (dh / 2) + sT);
            }

            $('#' + o.loader).empty().css('opacity', 1).append(imgtag).width('auto').height('auto').animate({ top: dt, left: dl }, { duration: o.outSpeed, queue: false, easing: o.outEase });
            $('#' + o.loader + ' ' + subType).animate({ height: dh, width: dw }, o.outSpeed, o.outEase,
				function() {
				    o.flyOutFinish.call(it);
				    shown = it;
				    $holder.addClass(o.shownClass);
				    animating = false;
				    $('#' + o.loader + ' ' + subType).click(function() { putAway(null) })
				});
        });
        bigimg.src = $holder.attr('href');
    }


    function putAway(next) {
        // for future development:
        if (animating == true || shown == false) { return false; }
        o.putAwayStart.call(shown);

        animating = true;

        // check $thumb loc again, in case it moved...
        tloc = $thumb.offset();
        tloc.left += o.startOffsetX;
        tloc.top += o.startOffsetY;

        $('#' + o.loader).animate({ top: tloc.top, left: tloc.left }, { duration: o.inSpeed, queue: false, easing: o.inEase });
        $('#' + o.loader + ' ' + subType).animate({ height: th, width: tw },
				o.inSpeed, o.inEase,
				function() {
				    $('#' + o.loader).css('display', 'none').remove();
				    o.putAwayFinish.call(shown);
				    animating = false;
				    bigimg = null;
				    if (next && next != shown) {
				        shown = false;
				        flyOut(next);
				    }
				    shown = false;
				    $holder.removeClass(o.shownClass);
				});
    }

    return this; // never break the chain

}
});