hugo-theme-relearn/layouts/partials/shortcodes/mermaid.html

{{- $page := .page }}
{{- if and (not $page) .context }}
  {{- $page = .context }}
  {{- warnf "%q: DEPRECATED parameter 'context' for shortcode 'mermaid' found, use 'page' instead; see https://mcshelby.github.io/hugo-theme-relearn/introduction/releasenotes/5/#5-18-0" $page.File.Filename }}
{{- end }}
{{- $content := .content }}
{{- $align := .align | default "center" }}
{{- $zoom := $page.Site.Params.mermaidZoom | default false }}
{{- with $page.Params.mermaidZoom }}
  {{- $zoom = . }}
  {{- if eq (printf "%T" .) "string" }}
    {{- $zoom = (eq . "true") }}
  {{- end }}
{{- end }}
{{- with .zoom }}
  {{- $zoom = . }}
  {{- if eq (printf "%T" .) "string" }}
    {{- $zoom = (eq . "true") }}
  {{- end }}
{{- end }}

{{- /* separate shortcode attributes from rest */}}
{{- $attributes := .attributes | default dict }}
{{- $otherAttributes := dict }}
{{- range $k, $v := $attributes }}
  {{- if eq $k "align" }}
  {{- else if eq $k "zoom" }}
  {{- else }}
    {{- $otherAttributes = (dict $k $v) | merge $otherAttributes }}
  {{- end }}
{{- end }}
{{- $attributes = $otherAttributes }}

{{- /* enrich attributes */}}
{{- $attributes = merge $attributes (dict "class" (delimit (append (index $attributes "class" | default slice) "mermaid" slice) " ")) }}
{{- $attributes = merge $attributes (dict "class" (delimit (append (index $attributes "class" | default slice) (printf "align-%s" $align) slice) " ")) }}
{{- $attributes = merge $attributes (dict "class" (delimit (append (index $attributes "class" | default slice) (printf "%s" (cond $zoom "zoomable" "")) slice) " ")) }}

{{- with $page -}}
<pre
  {{- range $k, $v := $attributes }}
    {{- if $v }}
      {{- printf " %s=%q" $k $v | safeHTMLAttr }}
    {{- end }}
  {{- end }}>{{ $content | htmlEscape | safeHTML }}</pre>
{{- .Store.Set "hasMermaid" true }}
{{- end }}