hugo-snap-gallery/layouts/shortcodes/snap-gallery.html

{{/*  Count number of gallery on page  */}}
{{- $.Page.Scratch.Add "gallerycount" 1 -}}
{{ $galno := $.Page.Scratch.Get "gallerycount" }}

{{/*  Load CSS/JS and make sure it is only loaded once  */}}
{{- if eq ($.Page.Scratch.Get "gallerycount") 1 }}
{{- with resources.Get "scss/snap-gallery.scss" | toCSS }}
<link rel="stylesheet" href="{{ .RelPermalink }}" crossorigin="anonymous">
{{- end }}
<script src="/js/snap-gallery.js"></script>
{{ end }}

{{/*  Initialise index of this gallery  */}}
<script>imageIndex[{{ $galno }}] = 1;</script>

{{/*  Initialise variables holding image paths and extension  */}}
{{ $imgs_collect := slice }}
{{ $imgs := slice }}
{{ $img_exts := slice ".jpg" ".jpeg" ".png" ".gif" ".webp" ".tiff" }}

{{/*  Get images from src Param, separated by comma  */}}
{{ range (split .Params.src ",") }}
  {{ $img := (trim . " ") }}
  {{ $img_static := print "/static/" $img }}
  {{/*  Only proceed when path exists  */}}
  {{ if os.FileExists $img_static }}
    {{/*  If current item is a directory, range each of them, and add with full path to the slice  */}}
    {{ if (os.Stat $img_static).IsDir }}
      {{- range readDir $img_static -}}
        {{ $imgs_collect = $imgs_collect | append (path.Join $img .Name ) }}
      {{ end }}
    {{/*  If a single file, just add it to the slice  */}}
    {{ else }}
      {{ $imgs_collect = $imgs_collect | append $img }}
    {{ end }}
  {{ end }}
{{ end }}

{{/*  Filter collected files by whether they are an image. Throw others out  */}}
{{ range $imgs_collect }}
  {{ if in $img_exts (lower (path.Ext .)) }}
    {{ $imgs = $imgs | append . }}
  {{ end }}
{{ end }}

{{/*  Define cursor when hovering over images, depending on lightbox status  */}}
{{ $lightbox := (default true .Params.lightbox) }}
{{ $cursor := "auto" }}
{{ if $lightbox }}{{ $cursor = "zoom-in" }}{{ end }}

{{/*  Visible images in separate modes  */}}
{{ $mode := default "gallery" .Params.mode }}
{{/*  Gallery mode  */}}
{{ if eq $mode "gallery" }}
{{ partial "gallery" (dict "columns" .Params.columns "minwidth" .Params.minwidth "imgs" $imgs "galno" $galno "cursor" $cursor) }}
{{/*  Slideshow mode  */}}
{{ else if eq $mode "slideshow" }}
{{ partial "slideshow" (dict "imgs" $imgs "galno" $galno "width" .Params.slideshowwidth "cursor" $cursor) }}
{{/*  Set autorotate timer for slideshow, if configured (default: yes)  */}}
{{ if .Params.slideshowrotate }}
<script>const autoSlideshow = setInterval(moveSlideshowItem, {{ default 5000 .Params.slideshowrotate_timer }}, {{ $galno }}, 1, "auto");</script>
{{ end }}
{{ end }}

{{/*  The Modal/Lightbox  */}}
{{ if $lightbox }}
{{ partial "lightbox" (dict "galno" $galno "imgs" $imgs) }}
{{ end }}