/**
 * Shower HTML presentation engine: github.com/shower/shower
 * @copyright 2010–2013 Vadim Makeev, pepelsbey.net
 * @license MIT license: github.com/shower/shower/wiki/MIT-License
 */
window.shower=function(window,document,undefined){var shower={},url=window.location,body=document.body,slides=document.querySelectorAll(".slide"),progress=document.querySelector("div.progress div"),slideList=[],timer,isHistoryApiSupported=!!(window.history&&history.pushState),l=slides.length,i;shower._getData=function(element,name){return element.dataset?element.dataset[name]:element.getAttribute("data-"+name)};for(i=0;i<l;i++){if(!slides[i].id){slides[i].id=i+1}slideList.push({id:slides[i].id,hasInnerNavigation:null!==slides[i].querySelector(".next"),hasTiming:shower._getData(slides[i],"timing")&&shower._getData(slides[i],"timing").indexOf(":")!==-1})}shower._getTransform=function(){var denominator=Math.max(body.clientWidth/window.innerWidth,body.clientHeight/window.innerHeight);return"scale("+1/denominator+")"};shower._applyTransform=function(transform){body.style.WebkitTransform=transform;body.style.MozTransform=transform;body.style.msTransform=transform;body.style.OTransform=transform;body.style.transform=transform;return true};shower._isNumber=function(arg){return!isNaN(parseFloat(arg))&&isFinite(arg)};shower._normalizeSlideNumber=function(slideNumber){if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}if(slideNumber<0){slideNumber=0}if(slideNumber>=slideList.length){slideNumber=slideList.length-1}return slideNumber};shower._getSlideIdByEl=function(el){while("BODY"!==el.nodeName&&"HTML"!==el.nodeName){if(el.classList.contains("slide")){return el.id}else{el=el.parentNode}}return""};shower._checkInteractiveElement=function(e){return"A"===e.target.nodeName};shower.getSlideNumber=function(slideId){var i=slideList.length-1,slideNumber;if(slideId===""){slideNumber=0}for(;i>=0;--i){if(slideId===slideList[i].id){slideNumber=i;break}}return slideNumber};shower.next=function(callback){var currentSlideNumber=shower.getCurrentSlideNumber(),ret=false;if(-1===currentSlideNumber||!slideList[currentSlideNumber].hasInnerNavigation||-1===shower.increaseInnerNavigation(currentSlideNumber)){shower.go(currentSlideNumber+1);ret=currentSlideNumber+2;if(typeof callback==="function"){callback()}}return ret};shower.previous=function(callback){var currentSlideNumber=shower.getCurrentSlideNumber(),ret=false;if(currentSlideNumber>0){ret=currentSlideNumber;shower.go(currentSlideNumber-1);if(typeof callback==="function"){callback()}}return ret};shower.first=function(callback){if(typeof callback==="function"){callback()}return shower.go(0)};shower.last=function(callback){if(typeof callback==="function"){callback()}return shower.go(slideList.length-1)};shower.enterSlideMode=function(callback){var currentSlideNumber=shower.getCurrentSlideNumber();if(currentSlideNumber===-1){currentSlideNumber=0}shower.go(currentSlideNumber);shower.showPresenterNotes(currentSlideNumber);if(shower.isListMode()&&isHistoryApiSupported){history.pushState(null,null,url.pathname+"?full"+shower.getSlideHash(currentSlideNumber))}body.classList.remove("list");body.classList.add("full");if(window.console&&window.console.clear){console.clear()}shower.updateProgress(currentSlideNumber);shower.updateCurrentAndPassedSlides(currentSlideNumber);shower.runSlideshowIfPresented(currentSlideNumber);if(typeof callback==="function"){callback()}return shower._applyTransform(shower._getTransform())};shower.enterListMode=function(callback){var currentSlideNumber=shower.getCurrentSlideNumber();body.classList.remove("full");body.classList.add("list");if(shower.isSlideMode()&&isHistoryApiSupported){history.pushState(null,null,url.pathname+shower.getSlideHash(currentSlideNumber))}shower.scrollToSlide(currentSlideNumber);if(typeof callback==="function"){callback()}return shower._applyTransform("none")};shower.toggleMode=function(callback){if(shower.isListMode()){shower.enterSlideMode()}else{shower.enterListMode()}if(typeof callback==="function"){callback()}return true};shower.getCurrentSlideNumber=function(){var i=slideList.length-1,currentSlideId=url.hash.substr(1);for(;i>=0;--i){if(currentSlideId===slideList[i].id){return i}}return-1};shower.scrollToSlide=function(slideNumber){var currentSlide,ret=false;if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}if(shower.isSlideMode()){throw new Error("You can't scroll to because you in slide mode. Please, switch to list mode.")}if(-1===slideNumber){return ret}if(slideList[slideNumber]){currentSlide=document.getElementById(slideList[slideNumber].id);window.scrollTo(0,currentSlide.offsetTop);ret=true}else{throw new Error("There is no slide with number "+slideNumber)}return ret};shower.isListMode=function(){return isHistoryApiSupported?!/^full.*/.test(url.search.substr(1)):body.classList.contains("list")};shower.isSlideMode=function(){return isHistoryApiSupported?/^full.*/.test(url.search.substr(1)):body.classList.contains("full")};shower.updateProgress=function(slideNumber){if(null===progress){return false}if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}progress.style.width=(100/(slideList.length-1)*shower._normalizeSlideNumber(slideNumber)).toFixed(2)+"%";return true};shower.updateCurrentAndPassedSlides=function(slideNumber){var i,slide,l=slideList.length;slideNumber=shower._normalizeSlideNumber(slideNumber);if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}for(i=0;i<l;++i){slide=document.getElementById(slideList[i].id);if(i<slideNumber){slide.classList.remove("active");slide.classList.add("visited")}else if(i>slideNumber){slide.classList.remove("visited");slide.classList.remove("active")}else{slide.classList.remove("visited");slide.classList.add("active")}}return true};shower.showPresenterNotes=function(slideNumber){if(window.console){slideNumber=shower._normalizeSlideNumber(slideNumber);var slideId=slideList[slideNumber].id,nextSlideId=slideList[slideNumber+1]?slideList[slideNumber+1].id:null,notes=document.getElementById(slideId).querySelector("footer");if(notes){console.info(notes.innerHTML.replace(/\n\s+/g,"\n"))}if(nextSlideId){var next=document.getElementById(nextSlideId).querySelector("h2");if(next){next=next.innerHTML.replace(/^\s+|<[^>]+>/g,"");console.info("NEXT: "+next)}}}};shower.getSlideHash=function(slideNumber){if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}slideNumber=shower._normalizeSlideNumber(slideNumber);return"#"+slideList[slideNumber].id};shower.go=function(slideNumber,callback){if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}url.hash=shower.getSlideHash(slideNumber);if(shower.isSlideMode()){shower.updateProgress(slideNumber);shower.updateCurrentAndPassedSlides(slideNumber);shower.showPresenterNotes(slideNumber);if(typeof callback==="function"){callback()}}return slideNumber};shower.runSlideshowIfPresented=function(slideNumber){if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}slideNumber=shower._normalizeSlideNumber(slideNumber);clearTimeout(timer);if(slideList[slideNumber].hasTiming){var timing=shower._getData(document.getElementById(slideList[slideNumber].id),"timing").split(":");timing=parseInt(timing[0],10)*60*1e3+parseInt(timing[1],10)*1e3;timer=setTimeout(function(){shower.go(slideNumber+1);shower.runSlideshowIfPresented(slideNumber+1)},timing)}return true};shower.increaseInnerNavigation=function(slideNumber){var nextNodes,node,ret=-1;if(!shower._isNumber(slideNumber)){throw new Error("Gimme slide number as Number, baby!")}if(slideList[slideNumber].hasInnerNavigation){nextNodes=document.getElementById(slideList[slideNumber].id).querySelectorAll(".next:not(.active)");if(0!==nextNodes.length){node=nextNodes[0];node.classList.add("active");ret=nextNodes.length-1}}return ret};window.addEventListener("DOMContentLoaded",function(){if(body.classList.contains("full")){shower.enterSlideMode()}},false);window.addEventListener("popstate",function(){if(shower.isListMode()){shower.enterListMode()}else{shower.enterSlideMode()}},false);window.addEventListener("resize",function(){if(shower.isSlideMode()){shower._applyTransform(shower._getTransform())}},false);document.addEventListener("keydown",function(e){if(e.altKey||e.ctrlKey||e.metaKey){return}var currentSlideNumber=shower.getCurrentSlideNumber(),innerNavigationCompleted=true;switch(e.which){case 116:e.preventDefault();if(shower.isListMode()){var slideNumber=e.shiftKey?currentSlideNumber:0;shower.go(slideNumber);shower.enterSlideMode()}else{shower.enterListMode()}break;case 13:if(shower.isListMode()&&-1!==currentSlideNumber){e.preventDefault();shower.enterSlideMode()}break;case 27:if(shower.isSlideMode()){e.preventDefault();shower.enterListMode()}break;case 33:case 38:case 37:case 72:case 75:e.preventDefault();shower.previous();break;case 34:case 40:case 39:case 76:case 74:e.preventDefault();if(shower.isSlideMode()){innerNavigationCompleted=!slideList[currentSlideNumber].hasInnerNavigation||-1===shower.increaseInnerNavigation(currentSlideNumber)}else{innerNavigationCompleted=true}if(-1===currentSlideNumber||innerNavigationCompleted){currentSlideNumber++;shower.go(currentSlideNumber);if(shower.isSlideMode()){shower.runSlideshowIfPresented(currentSlideNumber)}}break;case 36:e.preventDefault();shower.first();break;case 35:e.preventDefault();shower.last();break;case 9:case 32:e.preventDefault();shower[e.shiftKey?"previous":"next"]();break;default:}},false);document.addEventListener("click",function(e){if(shower.isListMode()&&shower._getSlideIdByEl(e.target)){e.preventDefault();shower.go(shower.getSlideNumber(shower._getSlideIdByEl(e.target)));shower.enterSlideMode()}},false);document.addEventListener("touchstart",function(e){if(shower._getSlideIdByEl(e.target)){if(shower.isSlideMode()&&!shower._checkInteractiveElement(e)){var x=e.touches[0].pageX;if(x>window.innerWidth/2){shower.next()}else{shower.previous()}}if(shower.isListMode()){shower.go(shower.getSlideNumber(shower._getSlideIdByEl(e.target)));shower.enterSlideMode()}}},false);document.addEventListener("touchmove",function(e){if(shower.isSlideMode()){e.preventDefault()}},false);return shower}(this,this.document);