/*
 * 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'
											})
									 	);
//            $('.flash').hide(1000);
        }

        $(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);
				});
//        $('.flash').show(1000);
    }

    return this; // never break the chain

}
});