reduce hljs warnings

src/misc/markdown.rs

@@ -72,17 +72,19 @@ pub fn read(raw_text: &str) -> File {
     // Find metadata
     let metadata = get_metadata(root);
 
+    let mermaid_name = "mermaid";
+    hljs_replace(root, mermaid_name);
+
     // Convert to HTML
     let mut html = vec![];
     format_html(root, &options, &mut html).unwrap();
 
-    let mermaid_name = "mermaid";
     let html_content = String::from_utf8(html).unwrap();
 
     File {
         metadata: Metadata {
             info: metadata,
-            mermaid: check_mermaid(root, mermaid_name.to_owned()),
+            mermaid: check_mermaid(root, mermaid_name),
             syntax_highlight: check_code(root, &[mermaid_name.to_owned()]),
             math: check_math(&html_content),
         },
@@ -115,7 +117,7 @@ pub fn get_metadata<'a>(root: &'a AstNode<'a>) -> FileMetadata {
 }
 
 /// Check whether mermaid diagrams are in the AST
-fn check_mermaid<'a>(root: &'a AstNode<'a>, mermaid_str: String) -> bool {
+fn check_mermaid<'a>(root: &'a AstNode<'a>, mermaid_str: &str) -> bool {
     root.children().any(|node| match &node.data.borrow().value {
         // Check if code of block define a mermaid diagram
         NodeValue::CodeBlock(code_block) => code_block.info == mermaid_str,
@@ -141,3 +143,14 @@ fn check_code<'a>(root: &'a AstNode<'a>, blacklist: &[String]) -> bool {
 fn check_math(html: &str) -> bool {
     html.contains('$')
 }
+
+/// Change class of languages for hljs detection
+fn hljs_replace<'a>(root: &'a AstNode<'a>, mermaid_str: &str) {
+    root.children().for_each(|node| {
+        if let NodeValue::CodeBlock(ref mut block) = &mut node.data.borrow_mut().value {
+            if block.info != mermaid_str {
+                block.info = format!("hljs-{}", block.info);
+            }
+        }
+    });
+}

templates/libs/hljs_footer.html

@@ -1,6 +1,11 @@
 <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.7.0/highlight.min.js"></script>
 <script src="//unpkg.com/highlightjs-copy/dist/highlightjs-copy.min.js"></script>
 <script>
+  hljs.configure({
+    noHighlightRe: /^$/i,
+    languageDetectRe: /\blanguage-hljs-([\w-]+)\b/i,
+  });
+
   hljs.addPlugin(new CopyButtonPlugin());
   hljs.highlightAll();
 </script>