5 lines
2.7 KiB
JavaScript
5 lines
2.7 KiB
JavaScript
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/*!
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* reveal.js Zoom plugin
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*/
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var e={id:"zoom",init:function(e){e.getRevealElement().addEventListener("mousedown",(function(n){var o=/Linux/.test(window.navigator.platform)?"ctrl":"alt",i=(e.getConfig().zoomKey?e.getConfig().zoomKey:o)+"Key",d=e.getConfig().zoomLevel?e.getConfig().zoomLevel:2;n[i]&&!e.isOverview()&&(n.preventDefault(),t.to({x:n.clientX,y:n.clientY,scale:d,pan:!1}))}))},destroy:function(){t.reset()}},t=function(){var e=1,n=0,o=0,i=-1,d=-1,l="transform"in document.body.style;function s(t,n){var o=r();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,l)if(1===n)document.body.style.transform="";else{var i=o.x+"px "+o.y+"px",d="translate("+-t.x+"px,"+-t.y+"px) scale("+n+")";document.body.style.transformOrigin=i,document.body.style.transform=d}else 1===n?(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=-(o.x+t.x)/n+"px",document.body.style.top=-(o.y+t.y)/n+"px",document.body.style.width=100*n+"%",document.body.style.height=100*n+"%",document.body.style.zoom=n);e=n,document.documentElement.classList&&(1!==e?document.documentElement.classList.add("zoomed"):document.documentElement.classList.remove("zoomed"))}function c(){var t=.12*window.innerWidth,i=.12*window.innerHeight,d=r();o<i?window.scroll(d.x,d.y-14/e*(1-o/i)):o>window.innerHeight-i&&window.scroll(d.x,d.y+(1-(window.innerHeight-o)/i)*(14/e)),n<t?window.scroll(d.x-14/e*(1-n/t),d.y):n>window.innerWidth-t&&window.scroll(d.x+(1-(window.innerWidth-n)/t)*(14/e),d.y)}function r(){return{x:void 0!==window.scrollX?window.scrollX:window.pageXOffset,y:void 0!==window.scrollY?window.scrollY:window.pageYOffset}}return l&&(document.body.style.transition="transform 0.8s ease"),document.addEventListener("keyup",(function(n){1!==e&&27===n.keyCode&&t.out()})),document.addEventListener("mousemove",(function(t){1!==e&&(n=t.clientX,o=t.clientY)})),{to:function(n){if(1!==e)t.out();else{if(n.x=n.x||0,n.y=n.y||0,n.element){var o=n.element.getBoundingClientRect();n.x=o.left-20,n.y=o.top-20,n.width=o.width+40,n.height=o.height+40}void 0!==n.width&&void 0!==n.height&&(n.scale=Math.max(Math.min(window.innerWidth/n.width,window.innerHeight/n.height),1)),n.scale>1&&(n.x*=n.scale,n.y*=n.scale,s(n,n.scale),!1!==n.pan&&(i=setTimeout((function(){d=setInterval(c,1e3/60)}),800)))}},out:function(){clearTimeout(i),clearInterval(d),s({x:0,y:0},1),e=1},magnify:function(e){this.to(e)},reset:function(){this.out()},zoomLevel:function(){return e}}}();export default function(){return e}
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