Support markdown sub/superscript, use external crate for spoilers (Le…

…mmyNet#5135)

* Use external crate for spoiler tags

* Also add other plugins

* fix test

crates/utils/Cargo.toml

@@ -82,6 +82,10 @@ ts-rs = { workspace = true, optional = true }
 enum-map = { workspace = true, optional = true }
 cfg-if = "1"
 clearurls = { version = "0.0.4", features = ["linkify"] }
+markdown-it-block-spoiler = "1.0.0"
+markdown-it-sub = "1.0.0"
+markdown-it-sup = "1.0.0"
+markdown-it-ruby = "1.0.0"
 
 [dev-dependencies]
 reqwest = { workspace = true }

crates/utils/src/utils/markdown/mod.rs

@@ -5,13 +5,15 @@ use std::sync::LazyLock;
 
 pub mod image_links;
 mod link_rule;
-mod spoiler_rule;
 
 static MARKDOWN_PARSER: LazyLock<MarkdownIt> = LazyLock::new(|| {
   let mut parser = MarkdownIt::new();
   markdown_it::plugins::cmark::add(&mut parser);
   markdown_it::plugins::extra::add(&mut parser);
-  spoiler_rule::add(&mut parser);
+  markdown_it_block_spoiler::add(&mut parser);
+  markdown_it_sub::add(&mut parser);
+  markdown_it_sup::add(&mut parser);
+  markdown_it_ruby::add(&mut parser);
   link_rule::add(&mut parser);
 
   parser
@@ -102,12 +104,22 @@ mod tests {
       (
         "basic spoiler",
         "::: spoiler click to see more\nhow spicy!\n:::\n",
-        "<details><summary>click to see more</summary><p>how spicy!\n</p></details>\n"
+        "<details><summary>click to see more</summary>how spicy!\n</details>\n"
       ),
       (
         "escape html special chars",
         "<script>alert('xss');</script> hello &\"",
         "<p>&lt;script&gt;alert(‘xss’);&lt;/script&gt; hello &amp;&quot;</p>\n"
+      ),("subscript","log~2~(a)","<p>log<sub>2</sub>(a)</p>\n"),
+      (
+        "superscript",
+        "Markdown^TM^",
+        "<p>Markdown<sup>TM</sup></p>\n"
+      ),
+      (
+        "ruby text",
+        "{漢|Kan}{字|ji}",
+        "<p><ruby>漢<rp>(</rp><rt>Kan</rt><rp>)</rp></ruby><ruby>字<rp>(</rp><rt>ji</rt><rp>)</rp></ruby></p>\n"
       )
     ];