/*
 * 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

       }
});