feat: Add mathjax & katex support

layout/_common/head.pug

@@ -51,4 +51,5 @@ link(rel="stylesheet" href=`${url_for(theme.css)}/index.css?v=${stun_env("versio
 include ../_third-party/analytics/index.pug
 include ../_third-party/search/index.pug
 include ../_third-party/comments/index.pug
+include ../_third-party/math/index.pug
 include ./config.pug

layout/_common/layout.pug

@@ -16,5 +16,3 @@ html(lang=config.language)
     
     include ../_scripts/cdn.pug
     include ../_scripts/common.pug
-    if is_post()
-      include ../_scripts/post.pug

layout/_scripts/common.pug

@@ -8,3 +8,6 @@ if theme.sidebar && theme.sidebar.enable
 
 if theme.algolia_search.enable
   script(src=`${ url_for(theme.js)}/algolia-search.js?v=${stun_env("version")}`)
+
+if is_post()
+  script(src=`${url_for(theme.js)}/post.js?v=${stun_env("version")}`)

layout/_scripts/post.pug

-script(src=`${url_for(theme.js)}/post.js?v=${stun_env("version")}`)

layout/_third-party/math/index.pug

+if theme.math.enable
+  - var isHomeHasMath = false;
+
+  if is_home()
+    - page.posts.each(function (post) {
+      if post.math && !isHomeHasMath
+        - isHomeHasMath = true
+    - })
+
+  if !is_tag() && !is_category() && !is_archive()
+    if isHomeHasMath || (theme.math.per_page || page.math)
+      if theme.math.engine == 'mathjax'
+        include ./mathjax.pug
+      else if theme.math.engine == 'katex'
+        include ./katex.pug

layout/_third-party/math/katex.pug

+link(href=theme.math.katex.cdn rel="stylesheet" type="text/css")
+
+if theme.math.katex.copy_tex.enable
+  if theme.math.katex.copy_tex.copy_tex_js
+    script(src=theme.math.katex.copy_tex.copy_tex_js async)
+  if theme.math.katex.copy_tex.copy_tex_css
+    link(href=theme.math.katex.copy_tex.copy_tex_css rel="stylesheet" type="text/css")

layout/_third-party/math/mathjax.pug

+script(type="text/x-mathjax-config").
+  var mathjaxMhchem = '';
+
+  if (!!'!{theme.math.mathjax.mhchem}') {
+    mathjaxMhchem = '!{theme.math.mathjax.mhchem}'
+    MathJax.Ajax.config.path['mhchem'] = mathjaxMhchem;
+  }
+
+  MathJax.Hub.Config({
+    tex2jax: {
+      inlineMath: [['$', '$'], ['\\(', '\\)']],
+      processEscapes: true,
+      skipTags: ['script', 'noscript', 'style', 'textarea', 'pre', 'code']
+    },
+    TeX: {
+      extensions: [mathjaxMhchem],
+      equationNumbers: {
+        autoNumber: 'AMS'
+      }
+    }
+  });
+
+  MathJax.Hub.Register.StartupHook('TeX Jax Ready', function() {
+    MathJax.InputJax.TeX.prefilterHooks.Add(function(data) {
+      if (data.display) {
+        var next = data.script.nextSibling;
+        while (next && next.nodeName.toLowerCase() === '#text') { next = next.nextSibling }
+        if (next && next.nodeName.toLowerCase() === 'br') { next.parentNode.removeChild(next) }
+      }
+    });
+  });
+
+script(type="text/x-mathjax-config").
+  MathJax.Hub.Queue(function() {
+    var all = MathJax.Hub.getAllJax(), i;
+    for (i = 0; i < all.length; i++) {
+      document.getElementById(all[i].inputID + '-Frame').parentNode.className += ' has-jax';
+    }
+  });
+
+script(src=theme.math.mathjax.cdn async)

source/js/scroll.js

@@ -2,6 +2,7 @@ $(document).ready(function () {
   // The previous distance from the page to the top.
   var prevScrollTop = 0;
 
+  addContainerToTable();
   // Initial run.
   headerNavScroll();
   backToTop();
@@ -101,4 +102,10 @@ $(document).ready(function () {
       $('#back-top').css('display', 'none');
     }
   }
+
+  // Add a container outside the tables to make it scroll when needed.
+  function addContainerToTable () {
+    var $wrapper = $('<div style="overflow: auto"></div>');
+    $('table').wrap($wrapper);
+  }
 });