fa23-si/plugin/highlight/highlight.js

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/*!
   * reveal.js plugin that adds syntax highlight support.
   */
const Si={id:"highlight",HIGHLIGHT_STEP_DELIMITER:"|",HIGHLIGHT_LINE_DELIMITER:",",HIGHLIGHT_LINE_RANGE_DELIMITER:"-",hljs:Ei,init:function(e){let t=e.getConfig().highlight||{};t.highlightOnLoad="boolean"!=typeof t.highlightOnLoad||t.highlightOnLoad,t.escapeHTML="boolean"!=typeof t.escapeHTML||t.escapeHTML,Array.from(e.getRevealElement().querySelectorAll("pre code")).forEach((e=>{e.parentNode.classList.add("code-wrapper");let a=e.querySelector('script[type="text/template"]');a&&(e.textContent=a.innerHTML),e.hasAttribute("data-trim")&&"function"==typeof e.innerHTML.trim&&(e.innerHTML=function(e){function t(e){return e.replace(/^[\s\uFEFF\xA0]+/g,"")}function a(e){for(var t=e.split("\n"),a=0;a<t.length&&""===t[a].trim();a++)t.splice(a--,1);for(a=t.length-1;a>=0&&""===t[a].trim();a--)t.splice(a,1);return t.join("\n")}return function(e){var n=a(e.innerHTML).split("\n"),r=n.reduce((function(e,a){return a.length>0&&t(a).length>0&&e>a.length-t(a).length?a.length-t(a).length:e}),Number.POSITIVE_INFINITY);return n.map((function(e,t){return e.slice(r)})).join("\n")}(e)}(e)),t.escapeHTML&&!e.hasAttribute("data-noescape")&&(e.innerHTML=e.innerHTML.replace(/</g,"&lt;").replace(/>/g,"&gt;")),e.addEventListener("focusout",(function(e){Ei.highlightElement(e.currentTarget)}),!1)})),"function"==typeof t.beforeHighlight&&t.beforeHighlight(Ei),t.highlightOnLoad&&Array.from(e.getRevealElement().querySelectorAll("pre code")).forEach((e=>{Si.highlightBlock(e)})),e.on("pdf-ready",(function(){[].slice.call(e.getRevealElement().querySelectorAll("pre code[data-line-numbers].current-fragment")).forEach((function(e){Si.scrollHighlightedLineIntoView(e,{},!0)}))}))},highlightBlock:function(e){if(Ei.highlightElement(e),0!==e.innerHTML.trim().length&&e.hasAttribute("data-line-numbers")){Ei.lineNumbersBlock(e,{singleLine:!0});var t={currentBlock:e},a=Si.deserializeHighlightSteps(e.getAttribute("data-line-numbers"));if(a.length>1){var n=parseInt(e.getAttribute("data-fragment-index"),10);("number"!=typeof n||isNaN(n))&&(n=null),a.slice(1).forEach((function(a){var r=e.cloneNode(!0);r.setAttribute("data-line-numbers",Si.serializeHighlightSteps([a])),r.classList.add("fragment"),e.parentNode.appendChild(r),Si.highlightLines(r),"number"==typeof n?(r.setAttribute("data-fragment-index",n),n+=1):r.removeAttribute("data-fragment-index"),r.addEventListener("visible",Si.scrollHighlightedLineIntoView.bind(Si,r,t)),r.addEventListener("hidden",Si.scrollHighlightedLineIntoView.bind(Si,r.previousSibling,t))})),e.removeAttribute("data-fragment-index"),e.setAttribute("data-line-numbers",Si.serializeHighlightSteps([a[0]]))}var r="function"==typeof e.closest?e.closest("section:not(.stack)"):null;if(r){var i=function(){Si.scrollHighlightedLineIntoView(e,t,!0),r.removeEventListener("visible",i)};r.addEventListener("visible",i)}Si.highlightLines(e)}},scrollHighlightedLineIntoView:function(e,t,a){cancelAnimationFrame(t.animationFrameID),t.currentBlock&&(e.scrollTop=t.currentBlock.scrollTop),t.currentBlock=e;var n=this.getHighlightedLineBounds(e),r=e.offsetHeight,i=getComputedStyle(e);r-=parseInt(i.paddingTop)+parseInt(i.paddingBottom);var o=e.scrollTop,s=n.top+(Math.min(n.bottom-n.top,r)-r)/2,l=e.querySelector(".hljs-ln");if(l&&(s+=l.offsetTop-parseInt(i.paddingTop)),s=Math.max(Math.min(s,e.scrollHeight-r),0),!0===a||o===s)e.scrollTop=s;else{if(e.scrollHeight<=r)return;var c=0,_=function(){c=Math.min(c+.02,1),e.scrollTop=o+(s-o)*Si.easeInOutQuart(c),c<1&&(t.animationFrameID=requestAnimationFrame(_))};_()}},easeInOutQuart:function(e){return e<.5?8*e*e*e*e:1-8*--e*e*e*e},getHighlightedLineBounds:function(e){var t=e.querySelectorAll(".highlight-line");if(0===t.length)return{top:0,bottom:0};var a=t[0],n=t[t.length-1];return{top:a.offsetTop,bottom:n.offsetTop+n.offsetHeight}},highlightLines:function(e,t){var a=Si.deserializeHighlightSteps(t||e.getAttribute("data-line-numbers"));a.length&&a[0].forEach((function(t){var a=[];"number"==typeof t.end?a=[].slice.call(e.querySelectorAll("table tr:nth-child(n+"+t.start+"):nth-child(-n+"+t.end+")")):"number"==typeof t.start&&(a=[].slice.call(e