From 141e4077b7fc08e6edd21b02b13162e3161cb41c Mon Sep 17 00:00:00 2001
From: Shohei Ueda <30958501+peaceiris@users.noreply.github.com>
Date: Fri, 11 Dec 2020 03:43:50 +0900
Subject: [PATCH] feat: auto enable math in posts (#241)

---
 exampleSite/content/en/posts/mathjax.md |  4 ++--
 layouts/_default/list.html              | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/exampleSite/content/en/posts/mathjax.md b/exampleSite/content/en/posts/mathjax.md
index bf72fe529..0b8db765d 100644
--- a/exampleSite/content/en/posts/mathjax.md
+++ b/exampleSite/content/en/posts/mathjax.md
@@ -1,6 +1,6 @@
 ---
-title: MathJax Support
-description: Beautiful math in all browsers
+title: MathJax Support $E=mc^2$
+description: Beautiful math in all browsers $E=mc^2$
 publishdate: 2020-01-01T01:00:00.000Z
 # draft: true
 # eyecatch: images/mathjax.jpg
diff --git a/layouts/_default/list.html b/layouts/_default/list.html
index e9f588306..b5507fa3c 100644
--- a/layouts/_default/list.html
+++ b/layouts/_default/list.html
@@ -1,4 +1,8 @@
 {{ define "main" }}
+
+{{ $math := false }}
+{{ $hasDollar := false }}
+
 <main>
   <article>
     <!-- "{{.Content}}" pulls from the markdown content of the corresponding _index.md -->
@@ -23,7 +27,16 @@
                 {{ end }}
               {{ end }}
               <h2 class="title">{{ $title }}</h2>
+              {{ if (findRE "\\$$" $title) }}
+                {{ $hasDollar = true }}
+              {{ end }}
               <p>{{ .Description }}</p>
+              {{ if (findRE "\\$$" .Description) }}
+                {{ $hasDollar = true }}
+              {{ end }}
+              {{ if .Params.math }}
+                {{ $math = true }}
+              {{ end }}
               <!-- TODO: is-pulled-right does not work -->
               <p>{{ .Date.Format "2006-01-02" }}{{ partial "badges/slide" . }}</p>
             </div>
@@ -33,4 +46,9 @@ <h2 class="title">{{ $title }}</h2>
     </div>
   {{ end }}
 </main>
+
+{{ if and $math $hasDollar }}
+  {{ partialCached "mathjax" . }}
+{{ end }}
+
 {{ end }}