Add MarkdownContent HTML rendering (#253)

Author: srna

Sources/MarkdownUI/DSL/Blocks/MarkdownContent.swift

@@ -108,4 +108,9 @@ public struct MarkdownContent: Equatable, MarkdownContentProtocol {
     let result = self.blocks.renderPlainText()
     return result.hasSuffix("\n") ? String(result.dropLast()) : result
   }
+
+  /// Renders this Markdown content value as HTML code.
+  public func renderHTML() -> String {
+    self.blocks.renderHTML()
+  }
 }

Sources/MarkdownUI/Parser/MarkdownParser.swift

@@ -20,6 +20,12 @@ extension Array where Element == BlockNode {
       String(cString: cmark_render_plaintext(document, CMARK_OPT_DEFAULT, 0))
     } ?? ""
   }
+
+  func renderHTML() -> String {
+    UnsafeNode.makeDocument(self) { document in
+      String(cString: cmark_render_html(document, CMARK_OPT_DEFAULT, nil))
+    } ?? ""
+  }
 }
 
 extension BlockNode {