/*
 * CrossSlide jQuery plugin v0.5
 *
 * 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$/i)[1]);}var pos=tokens[0]+" "+tokens[1];if(pos=="left top"||pos=="top left"){return{xrel:0,yrel:0,zoom:zoom};}if(pos=="left center"||pos=="center left"){return{xrel:0,yrel:0.5,zoom:zoom};}if(pos=="left bottom"||pos=="bottom left"){return{xrel:0,yrel:1,zoom:zoom};}if(pos=="center top"||pos=="top center"){return{xrel:0.5,yrel:0,zoom:zoom};}if(pos=="center center"){return{xrel:0.5,yrel:0.5,zoom:zoom};}if(pos=="center bottom"||pos=="bottom center"){return{xrel:0.5,yrel:1,zoom:zoom};}if(pos=="right top"||pos=="top right"){return{xrel:1,yrel:0,zoom:zoom};}if(pos=="right center"||pos=="center right"){return{xrel:1,yrel:0.5,zoom:zoom};}if(pos=="right bottom"||pos=="bottom right"){return{xrel:1,yrel:1,zoom:zoom};}return{xrel:parseInt(tokens[0].match(/^(\d+)%$/)[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();var elems=Array();self.get(0).crossSlideArgs=[opts,plan,callback];this.find("li").each(function(idx,elem){var newelem={"src":$(elem).find("img").attr("src")};if(plan[idx]){newelem=$.extend(newelem,plan[idx]);}elems[idx]=newelem;});plan=elems;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)$/.test(self.css("position"))){self.css({position:"relative"});}if(!self.width()||!self.height()){abort("container element does not have its own width and height");}if(opts.shuffle){plan.sort(function(){return Math.random()-0.5;});}for(var i=0;i<plan.length;++i){var p=plan[i];if(!p.src){abort("missing src parameter in picture {0}.",i+1);}if(speed){switch(p.dir){case"up":p.from={xrel:0.5,yrel:0,zoom:1};p.to={xrel:0.5,yrel:1,zoom:1};var slide_px=p.height-self_height-2*fade_px;break;case"down":p.from={xrel:0.5,yrel:1,zoom:1};p.to={xrel:0.5,yrel:0,zoom:1};var slide_px=p.height-self_height-2*fade_px;break;case"left":p.from={xrel:0,yrel:0.5,zoom:1};p.to={xrel:1,yrel:0.5,zoom:1};var slide_px=p.width-self_width-2*fade_px;break;case"right":p.from={xrel:1,yrel:0.5,zoom:1};p.to={xrel:0,yrel:0.5,zoom:1};var slide_px=p.width-self_width-2*fade_px;break;default:abort("missing or malformed dir parameter in picture {0}.",i+1);}if(slide_px<=0){abort("impossible animation: either picture {0} is too small or "+"div is too large or fade duration too long.",i+1);}p.time_ms=Math.round(slide_px/speed);}else{if(!sleep){if(!p.from||!p.to||!p.time){abort("missing either speed/sleep option, or from/to/time params "+"in picture {0}.",i+1);}try{p.from=parse_position_param(p.from);}catch(e){abort('malformed "from" parameter in picture {0}.',i+1);}try{p.to=parse_position_param(p.to);}catch(e){abort('malformed "to" parameter in picture {0}.',i+1);}if(!p.time){abort('missing "time" parameter in picture {0}.',i+1);}p.time_ms=Math.round(p.time*1000);}}if(p.from){$.each([p.from,p.to],function(i,step){step.width=Math.round(p.width*step.zoom);step.height=Math.round(p.height*step.zoom);step.left=Math.round((self_width-step.width)*step.xrel);step.top=Math.round((self_height-step.height)*step.yrel);});}var elm;if(p.href){elm=$(format('<a href="{0}"><img src="{1}"/></a>',p.href,p.src));}else{elm=$(format('<img src="{0}"/>',p.src));}if(p.onclick){elm.click(p.onclick);}if(p.alt){elm.find("img").attr("alt",p.alt);}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],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);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],2);var newf=function(){callback(i_slide,img_slide);img_hide.css("visibility","hidden");img_slide[animate](slide_anim,time,"linear",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){$.extend(from_anim,position_to_css(plan[i_from],3));$.extend(to_init,position_to_css(plan[i_to],0));$.extend(to_anim,position_to_css(plan[i_to],1));}if($.isEmptyObject(to_anim)){var newf=function(){callback(i_to,img_to,i_from,img_from);img_to.css(to_init);img_from[animate](from_anim,fade_ms,"linear",chainf);};}else{if($.isEmptyObject(from_anim)){var newf=function(){callback(i_to,img_to,i_from,img_from);img_to.css(to_init);img_to[animate](to_anim,fade_ms,"linear",chainf);};}else{var newf=function(){callback(i_to,img_to,i_from,img_from);img_to.css(to_init);img_to[animate](to_anim,fade_ms,"linear");img_from[animate](from_anim,fade_ms,"linear",chainf);};}}}if(opts.loop&&i==plan.length*2-2){var newf_orig=newf;newf=function(){if(--countdown){newf_orig();}};}if(i>0){return create_chain(i-1,newf);}else{return newf;}}var animation=create_chain(plan.length*2-1,function(){return animation();});animation();});return self;};$.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();};})();