/*!
 * CrossSlide jQuery plugin v0.6.2
 *
 * Copyright 2007-2010 by Tobia Conforto <tobia.conforto@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
(function(){var $=jQuery,animate=($.fn.startAnimation?'startAnimation':'animate'),pause_missing='pause plugin missing.';function format(str){for(var i=1;i<arguments.length;i++)
str=str.replace(new RegExp('\\{'+(i-1)+'}','g'),arguments[i]);return str;}
function abort(){arguments[0]='CrossSlide: '+arguments[0];throw new Error(format.apply(null,arguments));}
function parse_position_param(param){var zoom=1;var tokens=param.replace(/^\s*|\s*$/g,'').split(/\s+/);if(tokens.length>3)throw new Error();if(tokens[0]=='center')
if(tokens.length==1)
tokens=['center','center'];else if(tokens.length==2&&tokens[1].match(/^[\d.]+x$/i))
tokens=['center','center',tokens[1]];if(tokens.length==3)
zoom=parseFloat(tokens[2].match(/^([\d.]+)x$/i)[1]);var pos=tokens[0]+' '+tokens[1];if(pos=='left top'||pos=='top left')
return{xrel:0,yrel:0,zoom:zoom};if(pos=='left center'||pos=='center left')
return{xrel:0,yrel:.5,zoom:zoom};if(pos=='left bottom'||pos=='bottom left')
return{xrel:0,yrel:1,zoom:zoom};if(pos=='center top'||pos=='top center')
return{xrel:.5,yrel:0,zoom:zoom};if(pos=='center center')
return{xrel:.5,yrel:.5,zoom:zoom};if(pos=='center bottom'||pos=='bottom center')
return{xrel:.5,yrel:1,zoom:zoom};if(pos=='right top'||pos=='top right')
return{xrel:1,yrel:0,zoom:zoom};if(pos=='right center'||pos=='center right')
return{xrel:1,yrel:.5,zoom:zoom};if(pos=='right bottom'||pos=='bottom right')
return{xrel:1,yrel:1,zoom:zoom};return{xrel:parseInt(tokens[0].match(/^(\d+)%$/)[1])/100,yrel:parseInt(tokens[1].match(/^(\d+)%$/)[1])/100,zoom:zoom};}
$.fn.crossSlide=function(opts,plan,callback)
{var self=this,self_width=this.width(),self_height=this.height();if(self.length!=1)
abort('crossSlide() must be called on exactly 1 element')
self.get(0).crossSlideArgs=[opts,plan,callback];plan=$.map(plan,function(p){return $.extend({},p);});if(!opts.easing)
opts.easing=opts.variant?'swing':'linear';if(!callback)
callback=function(){};(function(proceed){var n_loaded=0;function loop(i,img){img.onload=function(e){n_loaded++;plan[i].width=img.width;plan[i].height=img.height;if(n_loaded==plan.length)
proceed();}
img.src=plan[i].src;if(i+1<plan.length)
loop(i+1,new Image());}
loop(0,new Image());})(function(){if(!opts.fade)
abort('missing fade parameter.');if(opts.speed&&opts.sleep)
abort('you cannot set both speed and sleep at the same time.');var fade_ms=Math.round(opts.fade*1000);if(opts.sleep)
var sleep=Math.round(opts.sleep*1000);if(opts.speed)
var speed=opts.speed/1000,fade_px=Math.round(fade_ms*speed);self.empty().css({overflow:'hidden',padding:0});if(!/^(absolute|relative|fixed)$/.test(self.css('position')))
self.css({position:'relative'});if(!self.width()||!self.height())
abort('container element does not have its own width and height');if(opts.shuffle)
plan.sort(function(){return Math.random()-0.5;});for(var i=0;i<plan.length;++i){var p=plan[i];if(!p.src)
abort('missing src parameter in picture {0}.',i+1);if(speed){switch(p.dir){case'up':p.from={xrel:.5,yrel:0,zoom:1};p.to={xrel:.5,yrel:1,zoom:1};var slide_px=p.height-self_height-2*fade_px;break;case'down':p.from={xrel:.5,yrel:1,zoom:1};p.to={xrel:.5,yrel:0,zoom:1};var slide_px=p.height-self_height-2*fade_px;break;case'left':p.from={xrel:0,yrel:.5,zoom:1};p.to={xrel:1,yrel:.5,zoom:1};var slide_px=p.width-self_width-2*fade_px;break;case'right':p.from={xrel:1,yrel:.5,zoom:1};p.to={xrel:0,yrel:.5,zoom:1};var slide_px=p.width-self_width-2*fade_px;break;default:abort('missing or malformed dir parameter in picture {0}.',i+1);}
if(slide_px<=0)
abort('impossible animation: either picture {0} is too small or '
+'div is too large or fade duration too long.',i+1);p.time_ms=Math.round(slide_px/speed);}else if(!sleep){if(!p.from||!p.to||!p.time)
abort('missing either speed/sleep option, or from/to/time params '
+'in picture {0}.',i+1);try{p.from=parse_position_param(p.from)}catch(e){abort('malformed "from" parameter in picture {0}.',i+1);}
try{p.to=parse_position_param(p.to)}catch(e){abort('malformed "to" parameter in picture {0}.',i+1);}
if(!p.time)
abort('missing "time" parameter in picture {0}.',i+1);p.time_ms=Math.round(p.time*1000)}
if(p.from)
$.each([p.from,p.to],function(i,each){each.width=Math.round(p.width*each.zoom);each.height=Math.round(p.height*each.zoom);each.left=Math.round((self_width-each.width)*each.xrel);each.top=Math.round((self_height-each.height)*each.yrel);});var img,elm;elm=img=$(format('<img src="{0}"/>',p.src));if(p.href)
elm=$(format('<a href="{0}"></a>',p.href)).append(img);if(p.onclick)
elm.click(p.onclick);if(p.alt)
img.attr('alt',p.alt);if(p.rel)
elm.attr('rel',p.rel);if(p.href&&p.target)
elm.attr('target',p.target);elm.appendTo(self);}
delete speed;function position_to_css(p,phase){var pos=[0,fade_ms/(p.time_ms+2*fade_ms),1-fade_ms/(p.time_ms+2*fade_ms),1][phase];return{left:Math.round(p.from.left+pos*(p.to.left-p.from.left)),top:Math.round(p.from.top+pos*(p.to.top-p.from.top)),width:Math.round(p.from.width+pos*(p.to.width-p.from.width)),height:Math.round(p.from.height+pos*(p.to.height-p.from.height))};}
var imgs=self.find('img').css({position:'absolute',visibility:'hidden',top:0,left:0,border:0});imgs.eq(0).css({visibility:'visible'});if(!sleep)
imgs.eq(0).css(position_to_css(plan[0],opts.variant?0:1));var countdown=opts.loop;function create_chain(i,chainf){if(i%2==0){if(sleep){var i_sleep=i/2,i_hide=(i_sleep-1+plan.length)%plan.length,img_sleep=imgs.eq(i_sleep),img_hide=imgs.eq(i_hide);var newf=function(){callback(i_sleep,img_sleep.get(0));img_hide.css('visibility','hidden');setTimeout(chainf,sleep);};}else{var i_slide=i/2,i_hide=(i_slide-1+plan.length)%plan.length,img_slide=imgs.eq(i_slide),img_hide=imgs.eq(i_hide),time=plan[i_slide].time_ms,slide_anim=position_to_css(plan[i_slide],opts.variant?3:2);var newf=function(){callback(i_slide,img_slide.get(0));img_hide.css('visibility','hidden');img_slide[animate](slide_anim,time,opts.easing,chainf);};}}else{var i_from=Math.floor(i/2),i_to=Math.ceil(i/2)%plan.length,img_from=imgs.eq(i_from),img_to=imgs.eq(i_to),from_anim={},to_init={visibility:'visible'},to_anim={};if(i_to>i_from){to_init.opacity=0;to_anim.opacity=1;if(opts.doubleFade)
from_anim.opacity=0;}else{from_anim.opacity=0;if(opts.doubleFade){to_init.opacity=0;to_anim.opacity=1;}}
if(!sleep){$.extend(to_init,position_to_css(plan[i_to],0));if(!opts.variant){$.extend(from_anim,position_to_css(plan[i_from],3));$.extend(to_anim,position_to_css(plan[i_to],1));}}
if($.isEmptyObject(to_anim)){var newf=function(){callback(i_to,img_to.get(0),i_from,img_from.get(0));img_to.css(to_init);img_from[animate](from_anim,fade_ms,'linear',chainf);};}else if($.isEmptyObject(from_anim)){var newf=function(){callback(i_to,img_to.get(0),i_from,img_from.get(0));img_to.css(to_init);img_to[animate](to_anim,fade_ms,'linear',chainf);};}else{var newf=function(){callback(i_to,img_to.get(0),i_from,img_from.get(0));img_to.css(to_init);img_to[animate](to_anim,fade_ms,'linear');img_from[animate](from_anim,fade_ms,'linear',chainf);};}}
if(opts.loop&&i==plan.length*2-2){var newf_orig=newf;newf=function(){if(--countdown)newf_orig();}}
if(i>0)
return create_chain(i-1,newf);else
return newf;}
var animation=create_chain(plan.length*2-1,function(){return animation();});animation();});return self;};$.fn.crossSlideFreeze=function()
{this.find('img').stop();}
$.fn.crossSlideStop=function()
{this.find('img').stop().remove();}
$.fn.crossSlideRestart=function()
{this.find('img').stop().remove();$.fn.crossSlide.apply(this,this.get(0).crossSlideArgs);}
$.fn.crossSlidePause=function()
{if(!$.fn.pause)
abort(pause_missing);this.find('img').pause();}
$.fn.crossSlideResume=function()
{if(!$.fn.pause)
abort(pause_missing);this.find('img').resume();}})();