Adding support for stem equations

_includes/script.html

@@ -13,7 +13,22 @@
     };
 
     var replace_math_symb = function(s){
-      return s.replace(/(`[^`]+`)/g, '<<math_symbol>>');
+        // replace mathjax
+        mathjax_containers = s.querySelectorAll('math, mjx-container');
+
+        if(mathjax_containers.length > 0) {
+            s = s.cloneNode(true);
+            s.querySelectorAll('math, mjx-container').forEach(container => {
+                container.replaceWith('<<math_symbol>>');
+            });
+        }
+
+        text = s.innerText;
+
+        // replace asciimath
+        text = text.replace(/(`[^`]+`)/g, '<<math_symbol>>');
+
+        return text;
     };
 
     var copyBtn = d.getElementById('engTermCopy');
@@ -43,7 +58,7 @@
         for (var _elm of elmsToCopy) {
             if (_elm.innerText.trim().length > 0) {
                 // textToCopy = textToCopy + _elm.innerText + '\r\n\r\n';
-                textToCopy = textToCopy + replace_math_symb(_elm.innerText) + '\r\n\r\n';
+                textToCopy = textToCopy + replace_math_symb(_elm) + '\r\n\r\n';
             };
         };
 

lib/jekyll/geolexica/hooks.rb

@@ -11,6 +11,7 @@ def register_all_hooks
         hook :post_read, :site, :load_glossary
         hook :pre_render, :documents, :expose_glossary
         hook :pre_render, :pages, :expose_glossary
+        hook :post_render, :pages, :convert_math
       end
 
       # Adds Jekyll::Site#glossary method, and initializes an empty glossary.
@@ -28,6 +29,26 @@ def expose_glossary(page_or_document, liquid_drop)
         liquid_drop["glossary"] = page_or_document.site.glossary
       end
 
+      def convert_math(page)
+        page.output.gsub!(/stem:\[([^\]]*?)\]/) do
+          ascii_equation = CGI.unescapeHTML(Regexp.last_match[1])
+
+          mathml_equation = Plurimath::Math
+                              .parse(ascii_equation, :asciimath)
+                              .to_mathml
+
+          # temporary hack to use display inline for math equations because
+          # currently there is no option to use display inline in plurimath
+          mathml_equation.gsub!("display=\"block\"", "display=\"inline\"")
+
+          # Removing newlines(\n) and escaping double quotes(")
+          # because they will cause parsing issues in json
+          mathml_equation.gsub!("\n", "").gsub!("\"", "\\\"") unless page.html?
+
+          mathml_equation
+        end
+      end
+
       def hook event, target, action
         Jekyll::Hooks.register target, event, &method(action)
       end