From 86e5224386fc192e89cafca5b913e80372ecaed9 Mon Sep 17 00:00:00 2001
From: Fred Brennan <copypaste@kittens.ph>
Date: Sat, 12 Nov 2022 17:25:24 -0500
Subject: [PATCH] DRAFT: HTML support

---
 packages/markdown/html.lua | 44 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 packages/markdown/html.lua

diff --git a/packages/markdown/html.lua b/packages/markdown/html.lua
new file mode 100644
index 0000000..7a61d22
--- /dev/null
+++ b/packages/markdown/html.lua
@@ -0,0 +1,44 @@
+local base = require("packages.base")
+local utils = require("packages.markdown.utils")
+
+local package = pl.class(base)
+package._name = "markdown.html"
+
+local passthroughs = {
+  "sup",
+  "sub",
+  "em",
+  "strong",
+  { ["div"] = "hbox" },
+  { ["b"] = "strong" },
+  { ["i"] = "em" },
+}
+
+package.registerHTMLcommands = function(self)
+  self:registerCommand("markdown:html:br", function (_, _)
+    SU.debug("markdown", "warning: manual linebreak (\\cr) inserted")
+    SILE.call("cr")
+  end, "HTML <br/> in Markdown")
+
+  for _, p in pairs(passthroughs) do
+    local html_name, sile_name
+    if type(p) == "table" then
+      html_name, sile_name = next(p), p[next(p)]
+    else
+      html_name, sile_name = p, p
+    end
+
+    self:registerCommand("markdown:html:" .. html_name, function(options, content)
+      SU.debug("markdown", "info: " .. html_name .. " replaced by \\" .. sile_name)
+      return utils.createCommand(sile_name, options, content)
+    end)
+  end
+end
+
+package.documentation = [[\begin{document}
+A helper package for Markdown processing, providing HTML support.
+
+It is not intended to be used alone.
+\end{document}]]
+
+return package