Begin adding support for Markdown in special blocks (#23) [WIP]

Author: cxw42

src/reader/md4c-reader.vala

@@ -183,7 +183,30 @@ namespace My
                 self.node_ = self.node_.parent;
             }
 
-            // TODO? check here that the block we are leaving has the type we expect?
+            // Postprocess special blocks
+            while(self.node_.data.ty == BLOCK_SPECIAL) {    //do once
+                // Render the block's contents back to Markdown (TODO find a
+                // better way)
+                string inner_contents = "";
+
+
+                // Parse the text
+                var inner_reader = new MarkdownMd4cReader();
+                // TODO copy reader options from this to inner_reader
+
+                Doc inner_doc = null;
+                try {
+                    inner_doc = inner_reader.read_string(inner_contents);
+                } catch(MarkupError e) {
+                    lwarningo(self.node_,
+                              "Could not parse special block's contents as Markdown: %s",
+                              e.message);
+                    break;
+                }
+
+                // Replace the special block's children with the results
+                // of parsing the inner text
+            }
 
             // Leave the current block
             self.node_ = self.node_.parent;