Extend slidebreak shortcode to all slide deck formats

NEWS.md

@@ -1,5 +1,7 @@
 # rpt (development version)
 
+* Extended `slidebreak` shortcode to support all slide deck formats (RevealJS, PowerPoint, Beamer) using the Quarto `slides` format alias (#103)
+
 * Switched from pkgdown to altdoc for documentation generation. Now using Quarto Website for documentation with native math equation support via MathJax.
 * Removed pkgdown-specific configurations and workflows.
 * Retained RevealJS multi-format support for Quarto vignettes and articles.

altdoc/_extensions/slidebreak/slidebreak.lua

@@ -1,18 +1,19 @@
 -- slidebreak.lua
--- A Quarto shortcode that inserts a slide break in revealjs and powerpoint formats
--- but does nothing in docx and html formats
+-- A Quarto shortcode that inserts a slide break in all slide deck formats
+-- (revealjs, pptx, beamer) but does nothing in docx and html formats
 
 function slidebreak()
   -- Get the current output format
+  -- See: https://quarto.org/docs/extensions/lua-api.html#format-detection
   local format = quarto.doc.is_format
 
-  -- Insert slide break for revealjs and powerpoint/pptx formats
-  if format("revealjs") or format("pptx") or format("powerpoint") then
-    -- Use HorizontalRule which creates a slide separator in RevealJS
+  -- Insert slide break for all slide/presentation formats (revealjs, pptx, beamer)
+  if format("revealjs") or format("pptx") or format("beamer") then
+    -- Use HorizontalRule which creates a slide separator in presentation formats
     return pandoc.HorizontalRule()
   end
 
-  -- Return empty for html and docx formats (and any other format)
+  -- Return empty for html and docx formats (and any other non-presentation format)
   return pandoc.Null()
 end