Update to last reveal.js 4.2.1 (#148)
diff --git a/inst/reveal.js-4.2.1/plugin/math/katex.js b/inst/reveal.js-4.2.1/plugin/math/katex.js
new file mode 100644
index 0000000..a8b47c4
--- /dev/null
+++ b/inst/reveal.js-4.2.1/plugin/math/katex.js
@@ -0,0 +1,96 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for KaTeX.
+ *
+ * @author Hakim El Hattab
+ * @author Gerhard Burger
+ */
+export const KaTeX = () => {
+ let deck;
+
+ let defaultOptions = {
+ version: 'latest',
+ delimiters: [
+ {left: '$$', right: '$$', display: true}, // Note: $$ has to come before $
+ {left: '$', right: '$', display: false},
+ {left: '\\(', right: '\\)', display: false},
+ {left: '\\[', right: '\\]', display: true}
+ ],
+ ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre']
+ }
+
+ const loadCss = src => {
+ let link = document.createElement('link');
+ link.rel = 'stylesheet';
+ link.href = src;
+ document.head.appendChild(link);
+ };
+
+ /**
+ * Loads a JavaScript file and returns a Promise for when it is loaded
+ * Credits: https://aaronsmith.online/easily-load-an-external-script-using-javascript/
+ */
+ const loadScript = src => {
+ return new Promise((resolve, reject) => {
+ const script = document.createElement('script')
+ script.type = 'text/javascript'
+ script.onload = resolve
+ script.onerror = reject
+ script.src = src
+ document.head.append(script)
+ })
+ };
+
+ async function loadScripts(urls) {
+ for(const url of urls) {
+ await loadScript(url);
+ }
+ }
+
+ return {
+ id: 'katex',
+
+ init: function (reveal) {
+
+ deck = reveal;
+
+ let revealOptions = deck.getConfig().katex || {};
+
+ let options = {...defaultOptions, ...revealOptions};
+ const {local, version, extensions, ...katexOptions} = options;
+
+ let baseUrl = options.local || 'https://cdn.jsdelivr.net/npm/katex';
+ let versionString = options.local ? '' : '@' + options.version;
+
+ let cssUrl = baseUrl + versionString + '/dist/katex.min.css';
+ let katexUrl = baseUrl + versionString + '/dist/katex.min.js';
+ let mhchemUrl = baseUrl + versionString + '/dist/contrib/mhchem.min.js'
+ let karUrl = baseUrl + versionString + '/dist/contrib/auto-render.min.js';
+
+ let katexScripts = [katexUrl];
+ if(options.extensions && options.extensions.includes("mhchem")) {
+ katexScripts.push(mhchemUrl);
+ }
+ katexScripts.push(karUrl);
+
+ const renderMath = () => {
+ renderMathInElement(reveal.getSlidesElement(), katexOptions);
+ deck.layout();
+ }
+
+ loadCss(cssUrl);
+
+ // For some reason dynamically loading with defer attribute doesn't result in the expected behavior, the below code does
+ loadScripts(katexScripts).then(() => {
+ if( deck.isReady() ) {
+ renderMath();
+ }
+ else {
+ deck.on( 'ready', renderMath.bind( this ) );
+ }
+ });
+
+ }
+ }
+
+};
diff --git a/inst/reveal.js-4.2.1/plugin/math/math.esm.js b/inst/reveal.js-4.2.1/plugin/math/math.esm.js
new file mode 100644
index 0000000..84699b3
--- /dev/null
+++ b/inst/reveal.js-4.2.1/plugin/math/math.esm.js
@@ -0,0 +1 @@
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diff --git a/inst/reveal.js-4.2.1/plugin/math/math.js b/inst/reveal.js-4.2.1/plugin/math/math.js
new file mode 100644
index 0000000..29ae21a
--- /dev/null
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c=ln(a,["local","version","extensions"]),u=a.local||"https://cdn.jsdelivr.net/npm/katex",f=a.local?"":"@"+a.version,s=u+f+"/dist/katex.min.css",l=u+f+"/dist/contrib/mhchem.min.js",p=u+f+"/dist/contrib/auto-render.min.js",h=[u+f+"/dist/katex.min.js"];a.extensions&&a.extensions.includes("mhchem")&&h.push(l),h.push(p);var d,v,y=function(){renderMathInElement(n.getSlidesElement(),c),t.layout()};d=s,(v=document.createElement("link")).rel="stylesheet",v.href=d,document.head.appendChild(v),function(t){return r.apply(this,arguments)}(h).then((function(){t.isReady()?y():t.on("ready",y.bind(o))}))}}},MathJax2:va,MathJax3:function(){var t={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:function(){MathJax.startup.defaultReady(),MathJax.startup.promise.then((function(){Reveal.layout()}))}}};return{id:"mathjax3",init:function(e){var n=e.getConfig().mathjax3||{},r=cn(cn({},t),n);r.tex=cn(cn({},t.tex),n.tex),r.options=cn(cn({},r.options),t.options),r.startup=cn(cn({},t.startup),n.startup);var o=r.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";r.mathjax=null,window.MathJax=r,function(t,e){var n=document.createElement("script");n.type="text/javascript",n.id="MathJax-script",n.src=t,n.async=!0,n.onload=function(){"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(n)}(o,(function(){Reveal.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}})}));
diff --git a/inst/reveal.js-4.2.1/plugin/math/mathjax2.js b/inst/reveal.js-4.2.1/plugin/math/mathjax2.js
new file mode 100644
index 0000000..daebe7e
--- /dev/null
+++ b/inst/reveal.js-4.2.1/plugin/math/mathjax2.js
@@ -0,0 +1,89 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax.
+ *
+ * @author Hakim El Hattab
+ */
+export const MathJax2 = () => {
+
+ // The reveal.js instance this plugin is attached to
+ let deck;
+
+ let defaultOptions = {
+ messageStyle: 'none',
+ tex2jax: {
+ inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ],
+ skipTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
+ },
+ skipStartupTypeset: true
+ };
+
+ function loadScript( url, callback ) {
+
+ let head = document.querySelector( 'head' );
+ let script = document.createElement( 'script' );
+ script.type = 'text/javascript';
+ script.src = url;
+
+ // Wrapper for callback to make sure it only fires once
+ let finish = () => {
+ if( typeof callback === 'function' ) {
+ callback.call();
+ callback = null;
+ }
+ }
+
+ script.onload = finish;
+
+ // IE
+ script.onreadystatechange = () => {
+ if ( this.readyState === 'loaded' ) {
+ finish();
+ }
+ }
+
+ // Normal browsers
+ head.appendChild( script );
+
+ }
+
+ return {
+ id: 'mathjax2',
+
+ init: function( reveal ) {
+
+ deck = reveal;
+
+ let revealOptions = deck.getConfig().mathjax2 || deck.getConfig().math || {};
+
+ let options = { ...defaultOptions, ...revealOptions };
+ let mathjax = options.mathjax || 'https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js';
+ let config = options.config || 'TeX-AMS_HTML-full';
+ let url = mathjax + '?config=' + config;
+
+ options.tex2jax = { ...defaultOptions.tex2jax, ...revealOptions.tex2jax };
+
+ options.mathjax = options.config = null;
+
+ loadScript( url, function() {
+
+ MathJax.Hub.Config( options );
+
+ // Typeset followed by an immediate reveal.js layout since
+ // the typesetting process could affect slide height
+ MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, deck.getRevealElement() ] );
+ MathJax.Hub.Queue( deck.layout );
+
+ // Reprocess equations in slides when they turn visible
+ deck.on( 'slidechanged', function( event ) {
+
+ MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, event.currentSlide ] );
+
+ } );
+
+ } );
+
+ }
+ }
+
+};
diff --git a/inst/reveal.js-4.2.1/plugin/math/mathjax3.js b/inst/reveal.js-4.2.1/plugin/math/mathjax3.js
new file mode 100644
index 0000000..38eb4ef
--- /dev/null
+++ b/inst/reveal.js-4.2.1/plugin/math/mathjax3.js
@@ -0,0 +1,77 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax 3
+ *
+ * @author Hakim El Hattab
+ * @author Gerhard Burger
+ */
+export const MathJax3 = () => {
+
+ // The reveal.js instance this plugin is attached to
+ let deck;
+
+ let defaultOptions = {
+ tex: {
+ inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ]
+ },
+ options: {
+ skipHtmlTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
+ },
+ startup: {
+ ready: () => {
+ MathJax.startup.defaultReady();
+ MathJax.startup.promise.then(() => {
+ Reveal.layout();
+ });
+ }
+ }
+ };
+
+ function loadScript( url, callback ) {
+
+ let script = document.createElement( 'script' );
+ script.type = "text/javascript"
+ script.id = "MathJax-script"
+ script.src = url;
+ script.async = true
+
+ // Wrapper for callback to make sure it only fires once
+ script.onload = () => {
+ if (typeof callback === 'function') {
+ callback.call();
+ callback = null;
+ }
+ };
+
+ document.head.appendChild( script );
+
+ }
+
+ return {
+ id: 'mathjax3',
+ init: function(reveal) {
+
+ deck = reveal;
+
+ let revealOptions = deck.getConfig().mathjax3 || {};
+ let options = {...defaultOptions, ...revealOptions};
+ options.tex = {...defaultOptions.tex, ...revealOptions.tex}
+ options.options = {...options.options, ...defaultOptions.options}
+ options.startup = {...defaultOptions.startup, ...revealOptions.startup}
+
+ let url = options.mathjax || 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js';
+ options.mathjax = null;
+
+ window.MathJax = options;
+
+ loadScript( url, function() {
+ // Reprocess equations in slides when they turn visible
+ Reveal.addEventListener( 'slidechanged', function( event ) {
+ MathJax.typeset();
+ } );
+ } );
+
+ }
+ }
+
+};
diff --git a/inst/reveal.js-4.2.1/plugin/math/plugin.js b/inst/reveal.js-4.2.1/plugin/math/plugin.js
new file mode 100644
index 0000000..a92ccfb
--- /dev/null
+++ b/inst/reveal.js-4.2.1/plugin/math/plugin.js
@@ -0,0 +1,15 @@
+import {KaTeX} from "./katex";
+import {MathJax2} from "./mathjax2";
+import {MathJax3} from "./mathjax3";
+
+const defaultTypesetter = MathJax2;
+
+/*!
+ * This plugin is a wrapper for the MathJax2,
+ * MathJax3 and KaTeX typesetter plugins.
+ */
+export default Plugin = Object.assign( defaultTypesetter(), {
+ KaTeX,
+ MathJax2,
+ MathJax3
+} );
\ No newline at end of file