Revert "use of mathml instead of katex"

This reverts commit 22b68f549e.

Cargo.lock

@@ -859,7 +859,6 @@ dependencies = [
  "chrono",
  "comrak",
  "glob",
- "latex2mathml",
  "minify-html",
  "ramhorns",
  "reqwest",
@@ -1271,12 +1270,6 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4345964bb142484797b161f473a503a434de77149dd8c7427788c6e13379388"
 
-[[package]]
-name = "latex2mathml"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "678cf5bdb3ba63a264e6e0c9eee36538ca1d2da0afa4dd801c1f96309e710765"
-
 [[package]]
 name = "lazy_static"
 version = "1.4.0"

Cargo.toml

@@ -20,6 +20,5 @@ serde_yaml = "0.9"
 minify-html = "0.10.8"
 glob = "0.3.1"
 comrak = "0.18"
-latex2mathml = "0.2.3"
 reqwest = { version = "0.11", features = ["json"] }
 chrono = "0.4.24"

src/misc/markdown.rs

@@ -18,6 +18,7 @@ pub struct FileMetadata {
 #[derive(Content)]
 pub struct Metadata {
     pub info: FileMetadata,
+    pub math: bool,
     pub mermaid: bool,
     pub syntax_highlight: bool,
 }
@@ -52,9 +53,9 @@ pub fn get_options() -> ComrakOptions {
             hardbreaks: false, // could be true? change by metadata could be good for compatibility
             github_pre_lang: false,
             full_info_string: true,
-            width: 0, // 0 mean disabled?
-            unsafe_: true,
-            escape: false, // may change in the future?
+            width: 0,       // 0 mean disabled?
+            unsafe_: false, // could be true? change by metadata could be good for compatibility
+            escape: false,  // may change in the future?
             list_style: ListStyleType::Dash,
             sourcepos: false,
         },
@@ -64,11 +65,8 @@ pub fn get_options() -> ComrakOptions {
 pub fn read(raw_text: &str) -> File {
     let arena = Arena::new();
 
-    // LaTeX conversion to MathML
-    let text = latex2mathml::replace(raw_text).unwrap_or_default();
-
     let options = get_options();
-    let root = parse_document(&arena, &text, &options);
+    let root = parse_document(&arena, raw_text, &options);
 
     // Find metadata
     let metadata = get_metadata(root);

templates/blog/footer.html

@@ -2,7 +2,31 @@
   <a href="/blog">Retour à la liste des posts</a>
 </footer>
 
-{{#data}} {{#post}} {{#metadata}} {{#mermaid}}
+{{#data}} {{#post}} {{#metadata}} {{#math}}
+<!-- KaTeX -->
+<script
+  defer
+  src="//cdn.jsdelivr.net/npm/katex@0.16.6/dist/katex.min.js"
+  integrity="sha384-j/ZricySXBnNMJy9meJCtyXTKMhIJ42heyr7oAdxTDBy/CYA9hzpMo+YTNV5C+1X"
+  crossorigin="anonymous"
+></script>
+<script
+  defer
+  src="//cdn.jsdelivr.net/npm/katex@0.16.6/dist/contrib/auto-render.min.js"
+  integrity="sha384-+VBxd3r6XgURycqtZ117nYw44OOcIax56Z4dCRWbxyPt0Koah1uHoK0o4+/RRE05"
+  crossorigin="anonymous"
+  onload="renderMathInElement(document.body);"
+></script>
+<script>
+  window.addEventListener("load", () => {
+    for (let item of document.getElementsByClassName("language-math")) {
+      katex.render(item.textContent, item, {
+        displayMode: item.classList.contains("math-display"),
+      });
+    }
+  });
+</script>
+{{/math}} {{#mermaid}}
 <!-- Mermaid diagrams -->
 <script type="module">
   import mermaid from "https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.esm.min.mjs";

templates/blog/head.html

@@ -39,7 +39,15 @@
   <meta content="/icons/apple-touch-icon.png" property="og:image" />
   <meta content="#43B581" data-react-helmet="true" name="theme-color" />
 
-  {{#data}} {{#post}} {{#metadata}} {{#syntax_highlight}}
+  {{#data}} {{#post}} {{#metadata}} {{#math}}
+  <!-- KaTeX -->
+  <link
+    rel="stylesheet"
+    href="//cdn.jsdelivr.net/npm/katex@0.16.6/dist/katex.min.css"
+    integrity="sha384-mXD7x5S50Ko38scHSnD4egvoExgMPbrseZorkbE49evAfv9nNcbrXJ8LLNsDgh9d"
+    crossorigin="anonymous"
+  />
+  {{/math}} {{#syntax_highlight}}
   <!-- Syntax highligthing -->
   <link
     rel="stylesheet"