-- box-filter.lua
-- Converts fenced divs like:
--   ::: {.defbox title="Def. 1.1 -- Something"}
--   content (normal Markdown: **bold**, lists, code blocks, math...)
--   :::
-- into raw LaTeX tcolorbox environments (defbox/theobox/exbox), while the
-- content itself stays as ordinary Markdown blocks that pandoc converts
-- normally (bold -> \textbf, code fences -> lstlisting, etc.).

local boxnames = { defbox = true, theobox = true, exbox = true }

function Div(el)
  for name, _ in pairs(boxnames) do
    if el.classes:includes(name) then
      local title = el.attributes["title"] or ""
      local open = pandoc.RawBlock("latex", "\\begin{" .. name .. "}[" .. title .. "]")
      local close = pandoc.RawBlock("latex", "\\end{" .. name .. "}")
      local blocks = { open }
      for _, b in ipairs(el.content) do
        table.insert(blocks, b)
      end
      table.insert(blocks, close)
      return blocks
    end
  end
  return nil
end