Vendor reveal.js 5.2.1 (from 5.1.0)
Contains the upstream 5.2.x feature set, most notably the lightbox
(data-preview-image/data-preview-video opens media full-size in an
overlay), controls: "speaker-only", search API extensions and
speaker-view fixes. The package's local additions are carried over
unchanged: IDS theme (ids.css/ids.scss), extra theme fonts,
chalkboard/customcontrols/menu plugins, and the 1280x720 default
slide size (patched in js/config.js and the dist bundles).
Also fixes a pre-existing fork bug (unrelated to the upgrade): the
slidechanged Highcharts resize hook in default.html now checks that
Highcharts exists, no longer throwing in decks without highcharter.
Docs: README (Rmd + rendered md) gained a short Lightbox section,
NEWS.md notes the library bump.
Verified: examples/ids.html and examples/simple.html re-render and run
error-free through all 13/5 slides (Reveal.VERSION = 5.2.1); lightbox
opens on click and closes with Esc in a dedicated test deck.
Change-Id: I0751129dfb0c9d20b56241377905876314a26011
diff --git a/inst/reveal.js-5.2.1/plugin/math/mathjax3.js b/inst/reveal.js-5.2.1/plugin/math/mathjax3.js
new file mode 100644
index 0000000..68572aa
--- /dev/null
+++ b/inst/reveal.js-5.2.1/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', 'code' ]
+ },
+ startup: {
+ ready: () => {
+ MathJax.startup.defaultReady();
+ MathJax.startup.promise.then(() => {
+ deck.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 = {...defaultOptions.options, ...revealOptions.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
+ deck.addEventListener( 'slidechanged', function( event ) {
+ MathJax.typeset();
+ } );
+ } );
+
+ }
+ }
+
+};