reveal.js/dist/plugin/zoom.js

The HTML Presentation Framework

(function(e,t){typeof exports==`object`&&typeof module<`u`?module.exports=t():typeof define==`function`&&define.amd?define([],t):(e=typeof globalThis<`u`?globalThis:e||self,e.RevealZoom=t())})(this,function(){var e={id:`zoom`,init:function(e){e.getRevealElement().addEventListener(`mousedown`,function(t){var r=/Linux/.test(window.navigator.platform)?`ctrl`:`alt`,i=(e.getConfig().zoomKey?e.getConfig().zoomKey:r)+`Key`,a=e.getConfig().zoomLevel?e.getConfig().zoomLevel:2;t[i]&&!e.isOverview()&&(t.preventDefault(),n.to({x:t.clientX,y:t.clientY,scale:a,pan:!1}))})},destroy:()=>{n.reset()}},t=()=>e,n=(function(){var e=1,t=0,r=0,i=-1,a=-1,o=`transform`in document.body.style;o&&(document.body.style.transition=`transform 0.8s ease`),document.addEventListener(`keyup`,function(t){e!==1&&t.keyCode===27&&n.out()}),document.addEventListener(`mousemove`,function(n){e!==1&&(t=n.clientX,r=n.clientY)});function s(t,n){var r=l();if(t.width=t.width||1,t.height=t.height||1,t.x-=(window.innerWidth-t.width*n)/2,t.y-=(window.innerHeight-t.height*n)/2,o)if(n===1)document.body.style.transform=``;else{var i=r.x+`px `+r.y+`px`,a=`translate(`+-t.x+`px,`+-t.y+`px) scale(`+n+`)`;document.body.style.transformOrigin=i,document.body.style.transform=a}else n===1?(document.body.style.position=``,document.body.style.left=``,document.body.style.top=``,document.body.style.width=``,document.body.style.height=``,document.body.style.zoom=``):(document.body.style.position=`relative`,document.body.style.left=-(r.x+t.x)/n+`px`,document.body.style.top=-(r.y+t.y)/n+`px`,document.body.style.width=n*100+`%`,document.body.style.height=n*100+`%`,document.body.style.zoom=n);e=n,document.documentElement.classList&&(e===1?document.documentElement.classList.remove(`zoomed`):document.documentElement.classList.add(`zoomed`))}function c(){var n=.12,i=window.innerWidth*n,a=window.innerHeight*n,o=l();r<a?window.scroll(o.x,o.y-(1-r/a)*(14/e)):r>window.innerHeight-a&&window.scroll(o.x,o.y+(1-(window.innerHeight-r)/a)*(14/e)),t<i?window.scroll(o.x-(1-t/i)*(14/e),o.y):t>window.innerWidth-i&&window.scroll(o.x+(1-(window.innerWidth-t)/i)*(14/e),o.y)}function l(){return{x:window.scrollX===void 0?window.pageXOffset:window.scrollX,y:window.scrollY===void 0?window.pageYOffset:window.scrollY}}return{to:function(t){if(e!==1)n.out();else{if(t.x=t.x||0,t.y=t.y||0,t.element){var r=20,o=t.element.getBoundingClientRect();t.x=o.left-r,t.y=o.top-r,t.width=o.width+r*2,t.height=o.height+r*2}t.width!==void 0&&t.height!==void 0&&(t.scale=Math.max(Math.min(window.innerWidth/t.width,window.innerHeight/t.height),1)),t.scale>1&&(t.x*=t.scale,t.y*=t.scale,s(t,t.scale),t.pan!==!1&&(i=setTimeout(function(){a=setInterval(c,1e3/60)},800)))}},out:function(){clearTimeout(i),clearInterval(a),s({x:0,y:0},1),e=1},magnify:function(e){this.to(e)},reset:function(){this.out()},zoomLevel:function(){return e}}})();return t});