/*
 * 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

    }
});