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/css/theme/template/exposer.scss b/inst/reveal.js-5.2.1/css/theme/template/exposer.scss
new file mode 100644
index 0000000..6f56d84
--- /dev/null
+++ b/inst/reveal.js-5.2.1/css/theme/template/exposer.scss
@@ -0,0 +1,32 @@
+// Exposes theme's variables for easy reuse in CSS for plugin authors
+
+@use "sass:color";
+
+:root {
+ --r-background-color: #{$backgroundColor};
+ --r-main-font: #{$mainFont};
+ --r-main-font-size: #{$mainFontSize};
+ --r-main-color: #{$mainColor};
+ --r-block-margin: #{$blockMargin};
+ --r-heading-margin: #{$headingMargin};
+ --r-heading-font: #{$headingFont};
+ --r-heading-color: #{$headingColor};
+ --r-heading-line-height: #{$headingLineHeight};
+ --r-heading-letter-spacing: #{$headingLetterSpacing};
+ --r-heading-text-transform: #{$headingTextTransform};
+ --r-heading-text-shadow: #{$headingTextShadow};
+ --r-heading-font-weight: #{$headingFontWeight};
+ --r-heading1-text-shadow: #{$heading1TextShadow};
+ --r-heading1-size: #{$heading1Size};
+ --r-heading2-size: #{$heading2Size};
+ --r-heading3-size: #{$heading3Size};
+ --r-heading4-size: #{$heading4Size};
+ --r-code-font: #{$codeFont};
+ --r-link-color: #{$linkColor};
+ --r-link-color-dark: #{color.scale( $linkColor, $lightness: -15% )};
+ --r-link-color-hover: #{$linkColorHover};
+ --r-selection-background-color: #{$selectionBackgroundColor};
+ --r-selection-color: #{$selectionColor};
+ --r-overlay-element-bg-color: #{$overlayElementBgColor};
+ --r-overlay-element-fg-color: #{$overlayElementFgColor};
+}