Very early poc

.vscode/settings.json

@@ -1,3 +1,7 @@
 {
-    "C_Cpp.default.configurationProvider": "ms-vscode.cmake-tools"
+    "C_Cpp.default.configurationProvider": "ms-vscode.cmake-tools",
+    "files.associations": {
+        "qapplication": "cpp",
+        "ostream": "cpp"
+    }
 }

CMakeLists.txt

@@ -25,6 +25,8 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 #endif()
 
 find_package(Qt5 COMPONENTS Widgets REQUIRED)
+find_library(libcmark-gfm libcmark-gfm.so REQUIRED)
+find_library(libcmark-gfm-extensions libcmark-gfm-extensions.so REQUIRED)
 
 if(ANDROID)
   add_library(browser SHARED
@@ -42,4 +44,4 @@ else()
   )
 endif()
 
-target_link_libraries(browser PRIVATE Qt5::Widgets)
+target_link_libraries(browser PRIVATE Qt5::Widgets libcmark-gfm.so libcmark-gfm-extensions.so)

main.cpp

@@ -1,11 +1,77 @@
 #include "mainwindow.h"
 
+#include <string.h>
+#include <cmark-gfm.h>
+#include <cmark-gfm-core-extensions.h>
+
 #include <QApplication>
+#include <QDebug>
+#include <QFile>
+#include <QDir>
+#include <QTextStream>
+
+// This is a function that will make enabling extensions easier later on.
+void addMarkdownExtension(cmark_parser *parser, char *extName) {
+  cmark_syntax_extension *ext = cmark_find_syntax_extension(extName);
+  if ( ext )
+    cmark_parser_attach_syntax_extension(parser, ext);
+}
+
+// A function to convert HTML to markdown
+char *to_html(const char *markdown_string)
+{
+    int options = CMARK_OPT_DEFAULT; // You can also use CMARK_OPT_STRIKETHROUGH_DOUBLE_TILDE to enforce double tilde.
+
+    cmark_gfm_core_extensions_ensure_registered();
+
+    // Modified version of cmark_parse_document in blocks.c
+    cmark_parser *parser = cmark_parser_new(options);
+
+    // Add extensions
+    addMarkdownExtension(parser, "strikethrough");
+    addMarkdownExtension(parser, "table");
+
+    // cmark AST
+    cmark_node *doc;
+    cmark_parser_feed(parser, markdown_string, strlen(markdown_string));
+    doc = cmark_parser_finish(parser);
+    cmark_parser_free(parser);
+
+    // no cmake_node_dump() ?
+    qDebug() << "AST" << doc << endl;
+
+    // Render
+    char *html = cmark_render_html(doc, options, NULL);
+    cmark_node_free(doc);
+
+    return html;
+}
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
     MainWindow w;
+
+    QString exePath = QCoreApplication::applicationDirPath();
+    QString filePath = exePath + QDir::separator() + "../test.md";
+
+    QFile file(filePath);
+    if(!file.open(QIODevice::ReadOnly))
+    {
+        qDebug() << "error opening file: " << file.error();
+        return -1;
+    }
+
+    QTextStream instream(&file);
+    QString line = instream.readLine();
+    const char *LineCStr = line.toStdString().c_str();
+    file.close();
+
+    char *html = to_html(LineCStr);
+
+    printf("%s", html);
+    free(html);
+
     w.show();
     return a.exec();
 }

test.md

@@ -0,0 +1,2 @@
+Hello *World*
+