has_renderings flag

to skip choose_cell_renderings filter if unused

Author: gordonwoodhull

src/resources/filters/main.lua

@@ -395,7 +395,8 @@ local quarto_post_filters = {
     traverser = 'jog',
   },
   { name = "post-choose-cell_renderings",
-    filter = choose_cell_renderings()
+    filter = choose_cell_renderings(),
+    flags = { "has_renderings" },
   },
   { name = "post-landscape-div",
     filter = landscape_div(),

src/resources/filters/normalize/flags.lua

@@ -109,6 +109,11 @@ function compute_flags()
             flags.needs_output_unrolling = true
           end
         end
+
+        -- cell-renderings.lua
+        if node.attributes["renderings"] then
+          flags.has_renderings = true
+        end
       end
     end,
     CodeBlock = function(node)