FixIt/layouts/partials/plugin/image.html

{{- /*  
The image plugin is a partial that handles image resources.

Parameters:
- Src: The path to the image. 
    It can be a page resource (inside a page bundle) https://gohugo.io/methods/page/resources/
    or a global resource (inside the assets directory) https://gohugo.io/functions/resources/get/
    or a link to a remote resource, which can be cached if the site parameter is set https://gohugo.io/functions/resources/getremote/
- Resources: If the image is a page resource, this parameter is required. It is the .Resources of the page.
- OptimConfig: optimisation parameter, defined like 
    {{- $optim := slice 
        (dict "Process" "resize 800x Center webp q75" "descriptor" "800w")
        (dict "Process" "resize 1200x Center webp q75" "descriptor" "1200w")
        (dict "Process" "resize 1600x Center webp q75" "descriptor" "1600w")
    -}}
    See https://gohugo.io/content-management/image-processing/ for more information.
- Alt: alt text for the image. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#alt
- Height: The intrinsic height of the image, in pixels. Must be an integer without a unit.
    We try to generate this value automatically if possible. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#height
- Width: The intrinsic width of the image, in pixels. Must be an integer without a unit.
    We try to generate this value automatically if possible. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#width
- Loading: Indicates how the browser should load the image: eager or lazy. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#loading
- Optimise: Override the site parameter to optimise the image.
- CacheRemote: Override the site parameter to cache remote images.

Thanks @HEIGE-PCloud for the original code in the DoIt theme.
https://github.com/HEIGE-PCloud/DoIt/blob/main/layouts/partials/plugin/image.html
*/ -}}

{{- $isInline := strings.HasPrefix .Src "data:image" -}}
{{- $isRemote := urls.Parse .Src | partial "function/is-url-remote.html" -}}
{{- $resource := dict -}}

{{- if not $isRemote | and (not $isInline) -}}
  {{- $resource = (.Resources.Get .Src) | default (resources.Get .Src) -}}
{{- end -}}

{{- $cacheRemote := .CacheRemote | default site.Params.image.cacheRemote | default false -}}
{{- $optimise := .Optimise | default site.Params.image.optimise | default false -}}

{{- if not $resource | and $isRemote | and $cacheRemote -}}
  {{- with try (resources.GetRemote .Src) -}}
    {{- with .Err -}}
      {{- warnf "%s" . -}}
    {{- else with .Value -}}
      {{- if .ResourceType | eq "image" -}}
        {{- /* placed remote image in public/images/remote/ */ -}}
        {{- $resource = . | resources.Copy (add "/images/remote/" .Name) -}}
      {{- end -}}
    {{- else -}}
      {{- warnf "Unable to get remote image %q" .Src -}}
    {{- end -}}
  {{- end -}}
{{- end -}}

{{- $isSvg := false -}}
{{- if $resource -}}
  {{- $isSvg = (eq $resource.MediaType.SubType "svg") -}}
{{- end -}}

{{- $optim := .OptimConfig -}}
{{- $srcset := "" -}}
{{- if $optim | and $resource | and $optimise | and (not $isSvg) -}}
  {{ $srcsetSlice := slice -}}
  {{- range $optim -}}
    {{- if .Process -}}
      {{- $processed := $resource.Process .Process -}}
      {{- $srcsetSlice = $srcsetSlice | append (printf "%s %s" $processed.RelPermalink .descriptor) -}}
    {{- end -}}
  {{- end -}}
  {{- $srcset = delimit $srcsetSlice ", " -}}
{{- end -}}

{{- $src := $resource.RelPermalink | default .Src -}}
{{- $alt := .Alt | default $src -}}
{{- $caption := .Caption | default $alt -}}
{{- $height := .Height -}}
{{- $width := .Width -}}
{{- if not $isSvg -}}
  {{- $height = $height | default $resource.Height | default "" -}}
  {{- $width = $width | default $resource.Width | default "" -}}
{{- end -}}

{{- if .Linked -}}
<a class="lightgallery" href="{{ $src }}" title="{{ .Title | default $alt }}" data-thumbnail="{{ $src }}"{{ with $caption }} data-sub-html="<h2>{{ . }}</h2>{{ with $.Title }}<p>{{ . }}</p>{{ end }}"{{ end }}{{ with .Rel }} rel="{{ . }}"{{ end }}>
{{- end -}}
<img {{- with .Class }} class="{{ . }}"{{ end }}{{ with .Loading }} loading="{{ . }}"{{ end }} {{ printf "src='%v'" $src | safeHTMLAttr }}{{ with $srcset }} srcset="{{ . }}"{{ end }}{{ with .Sizes }} sizes="{{ . }}"{{ end }}{{ with $alt }} alt="{{ . }}"{{ end }}{{ with $height }} height="{{ . }}"{{ end }}{{ with $width }} width="{{ . }}"{{ end }}{{ with .Decoding }} decoding="{{ . }}"{{ end }}{{ with .Referrerpolicy }} referrerpolicy="{{ . }}"{{ end }}>
{{- if .Linked -}}
</a>
{{- end -}}