Gros refactoring

backend/centered.lua

@@ -0,0 +1,29 @@
+-- centered.lua
+-- Copyright (c) bpj on GitHub
+-- https://github.com/jgm/pandoc/issues/719#issuecomment-922019826
+-- GPL-2+ license
+
+local center_for = {
+  latex = {
+    pre = pandoc.RawBlock('latex', '\\begin{center}'),
+    post = pandoc.RawBlock('latex', '\\end{center}'),
+  },
+  -- add more as needed...
+}
+
+function Div (div)
+  if div.classes:includes('center') then
+    if center_for[FORMAT] then
+      local rv = {}
+      if center_for[FORMAT].pre then
+        rv[#rv+1] = center_for[FORMAT].pre
+      end
+      rv[#rv+1] = div
+      if center_for[FORMAT].post then
+        rv[#rv+1] = center_for[FORMAT].post
+      end
+      return rv
+    end
+  end
+  return nil
+end