feat(convert): integrate md4c for bidirectional markdown sync (Phase 1)

3rdparty/s7/s7.h

@@ -12,7 +12,7 @@ typedef int64_t s7_int;
 typedef double s7_double;
 
 #ifndef __cplusplus
-#ifndef _MSC_VER
+#if !defined(_MSC_VER) || (_MSC_VER >= 1800)
   #include <stdbool.h>
 #else
 #ifndef true

src/Data/Convert/Generic/input.cpp

@@ -15,6 +15,7 @@
 #include "file.hpp"
 #include "hashmap.hpp"
 #include "image_files.hpp"
+#include "Markdown/markdown.hpp"
 #include "moebius/data/scheme.hpp"
 #include "path.hpp"
 #include "preferences.hpp"
@@ -310,7 +311,7 @@ void
 texmacs_input_rep::markdown_flush (bool force) {
   // ignore: empty buf in markdown is meaningless
   if (force && !is_empty (buf)) {
-    write (generic_to_tree (buf, "markdown-snippet"));
+    write (markdown_to_tree (buf));
     buf= "";
   }
 }

src/Data/Convert/Markdown/markdown.cpp

@@ -0,0 +1,18 @@
+/******************************************************************************
+ * MODULE     : markdown.cpp
+ * DESCRIPTION: Markdown to TMU tree conversion (Placeholder)
+ ******************************************************************************/
+
+#include "markdown.hpp"
+
+#include "md4c.h" // Testing md4c include
+#include "tree_helper.hpp"
+
+tree
+markdown_to_tree (string s) {
+  // TODO: Phase 2 - Implement md4c AST parsing and mapping to Mogan's tree
+  // For now, this is a placeholder that returns a basic verbatim tree or text
+  // just to prove the C++ binding and build works.
+
+  return tree (TUPLE, "document", s);
+}

src/Data/Convert/Markdown/markdown.hpp

@@ -0,0 +1,13 @@
+/******************************************************************************
+ * MODULE     : markdown.hpp
+ * DESCRIPTION: Markdown to TMU tree conversion (Placeholder)
+ ******************************************************************************/
+
+#ifndef MARKDOWN_H
+#define MARKDOWN_H
+
+#include "tree.hpp"
+
+tree markdown_to_tree (string s);
+
+#endif // defined MARKDOWN_H

xmake.lua

@@ -232,6 +232,7 @@ add_requires("freetype "..FREETYPE_VERSION, {system=false, configs={png=true}})
 add_requireconfs("liii-pdfhummus.freetype", {version = FREETYPE_VERSION, system = false, configs={png=true}, override=true})
 
 add_requires("argh v1.3.2")
+add_requires("md4c")
 
 --- package: qt6widgets
 QT6_VERSION="6.8.3"
@@ -638,6 +639,7 @@ target("libmogan") do
     add_packages("freetype")
     add_packages("s7")
     add_packages("argh")
+    add_packages("md4c")
     if not is_plat("macosx") then
         add_packages("libiconv")
     end