Use 16:9 aspect and bump reveal.js to 5.1.0
Change-Id: I6384639329daef18a40ca55cbd3c4eab0ae500e1
diff --git a/inst/reveal.js-5.1.0/css/print/pdf.scss b/inst/reveal.js-5.1.0/css/print/pdf.scss
new file mode 100644
index 0000000..0a1c2bf
--- /dev/null
+++ b/inst/reveal.js-5.1.0/css/print/pdf.scss
@@ -0,0 +1,159 @@
+/**
+ * This stylesheet is used to print reveal.js
+ * presentations to PDF.
+ *
+ * https://revealjs.com/pdf-export/
+ */
+
+html.reveal-print {
+ * {
+ -webkit-print-color-adjust: exact;
+ }
+
+ & {
+ width: 100%;
+ height: 100%;
+ overflow: visible;
+ }
+
+ body {
+ margin: 0 auto !important;
+ border: 0;
+ padding: 0;
+ float: none !important;
+ overflow: visible;
+ }
+
+ /* Remove any elements not needed in print. */
+ .nestedarrow,
+ .reveal .controls,
+ .reveal .progress,
+ .reveal .playback,
+ .reveal.overview,
+ .state-background {
+ display: none !important;
+ }
+
+ .reveal pre code {
+ overflow: hidden !important;
+ }
+
+ .reveal {
+ width: auto !important;
+ height: auto !important;
+ overflow: hidden !important;
+ }
+ .reveal .slides {
+ position: static;
+ width: 100% !important;
+ height: auto !important;
+ zoom: 1 !important;
+ pointer-events: initial;
+
+ left: auto;
+ top: auto;
+ margin: 0 !important;
+ padding: 0 !important;
+
+ overflow: visible;
+ display: block;
+
+ perspective: none;
+ perspective-origin: 50% 50%;
+ }
+
+ .reveal .slides .pdf-page {
+ position: relative;
+ overflow: hidden;
+ z-index: 1;
+
+ page-break-after: always;
+ }
+
+ .reveal .slides .pdf-page:last-of-type {
+ page-break-after: avoid;
+ }
+
+ .reveal .slides section {
+ visibility: visible !important;
+ display: block !important;
+ position: absolute !important;
+
+ margin: 0 !important;
+ padding: 0 !important;
+ box-sizing: border-box !important;
+ min-height: 1px;
+
+ opacity: 1 !important;
+
+ transform-style: flat !important;
+ transform: none !important;
+ }
+
+ .reveal section.stack {
+ position: relative !important;
+ margin: 0 !important;
+ padding: 0 !important;
+ page-break-after: avoid !important;
+ height: auto !important;
+ min-height: auto !important;
+ }
+
+ .reveal img {
+ box-shadow: none;
+ }
+
+ /* Slide backgrounds are placed inside of their slide when exporting to PDF */
+ .reveal .backgrounds {
+ display: none;
+ }
+ .reveal .slide-background {
+ display: block !important;
+ position: absolute;
+ top: 0;
+ left: 0;
+ width: 100%;
+ height: 100%;
+ z-index: auto !important;
+ }
+
+ /* Display slide speaker notes when 'showNotes' is enabled */
+ .reveal.show-notes {
+ max-width: none;
+ max-height: none;
+ }
+ .reveal .speaker-notes-pdf {
+ display: block;
+ width: 100%;
+ height: auto;
+ max-height: none;
+ top: auto;
+ right: auto;
+ bottom: auto;
+ left: auto;
+ z-index: 100;
+ }
+
+ /* Layout option which makes notes appear on a separate page */
+ .reveal .speaker-notes-pdf[data-layout="separate-page"] {
+ position: relative;
+ color: inherit;
+ background-color: transparent;
+ padding: 20px;
+ page-break-after: always;
+ border: 0;
+ }
+
+ /* Display slide numbers when 'slideNumber' is enabled */
+ .reveal .slide-number-pdf {
+ display: block;
+ position: absolute;
+ font-size: 14px;
+ visibility: visible;
+ }
+
+ /* This accessibility tool is not useful in PDF and breaks it visually */
+ .aria-status {
+ display: none;
+ }
+}