From e4e43bd9b12a3e37f0d3c2760ea7f867ba8273a7 Mon Sep 17 00:00:00 2001
From: Alex Shpak <alex-shpak@users.noreply.github.com>
Date: Sat, 11 Apr 2020 20:05:43 +0200
Subject: [PATCH] Refactor KaTeX shortcode, remove whitespaces and fix font
 size

---
 exampleSite/content/docs/shortcodes/katex.md | 17 ++++-------------
 layouts/shortcodes/katex.html                | 16 ++++++++--------
 2 files changed, 12 insertions(+), 21 deletions(-)

diff --git a/exampleSite/content/docs/shortcodes/katex.md b/exampleSite/content/docs/shortcodes/katex.md
index fae88c5..4beeaa0 100644
--- a/exampleSite/content/docs/shortcodes/katex.md
+++ b/exampleSite/content/docs/shortcodes/katex.md
@@ -7,20 +7,14 @@ KaTeX shortcode let you render math typesetting in markdown document. See [KaTeX
 
 ```latex
 {{</* katex [display] [class="text-center"]  */>}}
-x = \begin{cases}
-   a &\text{if } b \\
-   c &\text{if } d
-\end{cases}
+f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi
 {{</* /katex */>}}
 ```
 
 <--->
 
-{{< katex >}}
-x = \begin{cases}
-   a &\text{if } b \\
-   c &\text{if } d
-\end{cases}
+{{< katex display >}}
+f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi
 {{< /katex >}}
 
 {{< /columns >}}
@@ -29,9 +23,6 @@ x = \begin{cases}
 
 Here is some inline example: {{< katex >}}\pi(x){{< /katex >}}, rendered in the same line. And below is `display` example, having `display: block`
 {{< katex display >}}
-x = \begin{cases}
-   a &\text{if } b \\
-   c &\text{if } d
-\end{cases}
+f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi
 {{< /katex >}}
 Text continues here.
diff --git a/layouts/shortcodes/katex.html b/layouts/shortcodes/katex.html
index cc98a7d..e6b7564 100644
--- a/layouts/shortcodes/katex.html
+++ b/layouts/shortcodes/katex.html
@@ -1,13 +1,13 @@
-{{ if not (.Page.Scratch.Get "katex") }}
+{{- if not (.Page.Scratch.Get "katex") -}}
 <!-- Include katext only first time -->
-<link rel="stylesheet" href="{{ "katex/katex.min.css" | relURL }}">
+<link rel="stylesheet" href="{{ "katex/katex.min.css" | relURL }}" />
 <script defer src="{{ "katex/katex.min.js" | relURL }}"></script>
 <script defer src="{{ "katex/auto-render.min.js" | relURL }}" onload="renderMathInElement(document.body);"></script>
-{{ .Page.Scratch.Set "katex" true }}
-{{ end }}
+{{- .Page.Scratch.Set "katex" true -}}
+{{- end -}}
 
-<span class="katex{{ with .Get "class" }} {{ . }}{{ end }}">
-  {{ if in .Params "display" }}\[{{ else }}\({{ end -}}
-  {{ $.Inner }}
-  {{- if in .Params "display" }}\]{{ else }}\){{ end }}
+<span {{- with .Get "class" }} class="{{ . }}"{{ end }}>
+  {{- cond (in .Params "display") "\\[" "\\(" -}}
+  {{- trim .Inner "\n" -}}
+  {{- cond (in .Params "display") "\\]" "\\)" -}}
 </span>