hugo-theme-relearn/layouts/partials/_relearn/imageAttributes.gotmpl

{{- $attributes := .attributes | default dict }}
{{- $height := "auto" }}
{{- $width := "auto" }}
{{- $effects := dict "border" false "lazy" true "lightbox" true "shadow" false }}
{{- if .page.Site.Params.imageeffects }}
  {{- $effects = merge $effects .page.Site.Params.imageeffects }}
{{- end }}
{{- if .page.Params.imageEffects }}
  {{- $effects = merge $effects .page.Params.imageEffects }}
{{- end }}
{{- $u := urls.Parse .url }}
{{- if $u.RawQuery }}
  {{- if $u.Query.Has "classes" }}
    {{- $classes := slice | append (split ($u.Query.Get "classes") ",") }}
    {{- range $classes }}
      {{- $k := . }}
      {{- $v := true }}
      {{- if strings.HasPrefix $k "no" }}
        {{- $k := strings.TrimPrefix "no" $k }}
        {{- $v := false }}
      {{- end }}
      {{- $effects = merge $effects (dict $k $v) }}
    {{- end }}
  {{- end }}
  {{- if $u.Query.Has "featherlight" }}
    {{- $filepath := "[virtual file]" }}{{ with and .page .page.File .page.File.Filename }}{{ $filepath = . }}{{ end }}
    {{- warnf "%q: DEPRECATED usage of 'featherlight' image CSS class found, use 'lightbox' instead; see https://mcshelby.github.io/hugo-theme-relearn/introduction/releasenotes/5/#5-11-0" $filepath }}
    {{- $effects = merge $effects (dict "lightbox" (ne ($u.Query.Get "featherlight") "false")) }}
  {{- end }}
  {{- range $k, $v := $effects }}
    {{- if $u.Query.Has $k }}
      {{- $effects = merge $effects (dict $k (ne ($u.Query.Get $k) "false")) }}
    {{- end }}
  {{- end }}
  {{- range $k, $v := $effects }}
    {{- if $u.Query.Has $k }}
      {{- $paramValue := $u.Query.Get $k }}
      {{- $newValue := true }}
      {{- if eq $paramValue "" }}
        {{- $newValue = true }}
      {{- else if eq $paramValue "true" }}
        {{- $newValue = true }}
      {{- else if eq $paramValue "false" }}
        {{- $newValue = false }}
      {{- else }}
        {{- $newValue = $paramValue }}
      {{- end }}
      {{- $effects = merge $effects (dict $k $newValue) }}
    {{- end }}
  {{- end }}
  {{- with $u.Query.Get "height" }}
    {{- $height = . }}
  {{- end }}
  {{- with $u.Query.Get "width" }}
    {{- $width = . }}
  {{- end }}
{{- end }}
{{- $classes := slice }}
{{- range $k, $v := $effects }}
  {{- if $v }}
    {{- if eq (printf "%T" $v) "bool" }}
	  {{- $classes = $classes | append $k }}
    {{- end }}
  {{- end }}
{{- end }}
{{- if $attributes.class }}{{ $classes = $classes | append (split $attributes.class " ") }}{{ end }}
{{- $attributes = merge $attributes (dict "class" (delimit $classes " ")) }}
{{- $attributes = merge $attributes (dict "src" .url) }}
{{- $attributes = merge $attributes (dict "style" (printf " height: %s; width: %s;%s" $height $width (index $attributes "style" | default ""))) }}
{{- if $effects.lazy }}{{ $attributes = merge $attributes (dict "loading" "lazy") }}{{ end }}
{{- return $attributes }}