FixIt/layouts/partials/plugin/image.html

{{- /* this method is only available for image resources that are raster images */ -}}
{{- $src := .Src -}}
{{- $class := .Class | default "" -}}
{{- $style := "" -}}
{{- $loading := .Loading | default "lazy" -}}
{{- $onload := "" -}}
{{- $onerror := "" -}}
{{- $cacheRemoteImages := (.Params.cacheRemoteImages | default dict) | merge site.Params.cacheRemoteImages -}}
{{- $suffixList := slice ".jpeg" ".jpg" ".png" ".gif" ".bmp" ".tif" ".tiff" ".webp" -}}

{{- /* handle for default size image */ -}}
{{- with dict "Path" $src "Resources" .Resources "CacheRemoteImages" $cacheRemoteImages.enable | partial "function/resource.html" -}}
  {{- $url := urls.Parse $src -}}
  {{- $suffixValid := dict "Path" $src "Suffixes" $suffixList | partial "function/suffix-validation.html" -}}
  {{- if not $url.Host | or $cacheRemoteImages.replace -}}
    {{- $src = .RelPermalink -}}
  {{- end -}}
  {{- if not $suffixValid -}}
    {{- $class = printf "%v suffix-invalid" $class -}}
  {{- else if eq .ResourceType "image" -}}
    {{- $style = printf "--width: %vpx;--aspect-ratio: %v / %v;" .Width .Width .Height | safeHTMLAttr -}}
  {{- end -}}
{{- end -}}

{{- /* handle for small size image */ -}}
{{- $small := .SrcSmall | default $src -}}
{{- with dict "Path" .SrcSmall "Resources" .Resources "CacheRemoteImages" $cacheRemoteImages.enable | partial "function/resource.html" -}}
  {{- $url := urls.Parse $.SrcSmall -}}
  {{- $suffixValid := dict "Path" $.SrcSmall "Suffixes" $suffixList | partial "function/suffix-validation.html" -}}
  {{- if not $url.Host | or $cacheRemoteImages.replace -}}
    {{- $small = .RelPermalink -}}
  {{- end -}}
  {{- if not $suffixValid -}}
    {{- $class = printf "%v suffix-invalid__small" $class -}}
  {{- else if eq .ResourceType "image" -}}
    {{- $style = printf "%v--width-small: %vpx;--aspect-ratio-small: %v / %v;" $style .Width .Width .Height | safeHTMLAttr -}}
  {{- end -}}
{{- end -}}

{{- /* handle for large size image */ -}}
{{- $large := .SrcLarge | default $src -}}
{{- with dict "Path" .SrcLarge "Resources" .Resources "CacheRemoteImages" $cacheRemoteImages.enable | partial "function/resource.html" -}}
  {{- $url := urls.Parse $.SrcLarge -}}
  {{- $suffixValid := dict "Path" $.SrcLarge "Suffixes" $suffixList | partial "function/suffix-validation.html" -}}
  {{- if not $url.Host | or $cacheRemoteImages.replace -}}
    {{- $large = .RelPermalink -}}
  {{- end -}}
  {{- if not $suffixValid -}}
    {{- $class = printf "%v suffix-invalid__large" $class -}}
  {{- else if eq .ResourceType "image" -}}
    {{- $style = printf "%v--width-large: %vpx;--aspect-ratio-large: %v / %v;" $style .Width .Width .Height | safeHTMLAttr -}}
  {{- end -}}
{{- end -}}

{{- /* set image alt and caption */ -}}
{{- $alt := .Alt | default $src -}}
{{- $caption := .Caption | default $alt -}}

{{- /* set image lazy loading */ -}}
{{- /* for details, see https://lruihao.cn/posts/native-img-loading-lazy/ */ -}}
{{- if eq $loading "lazy" -}}
  {{- /* TODO move to theme.js */ -}}
  {{- $commonScript := "this.title=this.dataset.title;this.alt=this.dataset.alt;for(const i of ['style', 'data-title','data-alt','onerror','onload']){this.removeAttribute(i);}" -}}
  {{- $onload = printf " onload=\"%vthis.dataset.lazyloaded='';\"" $commonScript | safeHTMLAttr -}}
  {{- $onerror = printf " onerror=\"%v\"" $commonScript | safeHTMLAttr -}}
  {{- $style = printf " style=\"%vbackground: url(%v) no-repeat center;\"" $style (resources.Get "svg/loading.svg" | minify).RelPermalink | safeHTMLAttr -}}
{{- end -}}

{{- /* structure of lightgallery or img */ -}}
{{- if .Linked -}}
  <a class="lightgallery" href="{{ $large | safeURL }}" data-thumbnail="{{ $small | safeURL }}"{{ with $caption }} data-sub-html="<h2>{{ . }}</h2>{{ with $.Title }}<p>{{ . }}</p>{{ end }}"{{ end }}{{ with .Rel }} rel="{{ . }}"{{ end }}>
{{- end -}}
<img loading="{{ $loading }}" src="{{ $src | safeURL }}" srcset="{{ $small | safeURL }}?size=small, {{ $src | safeURL }}?size=medium 1.5x, {{ $large | safeURL }}?size=large 2x" sizes="auto"
  {{- if eq $loading "lazy" }} data-title="{{ .Title | default $alt }}" data-alt="{{ $alt }}"
  {{- else }} title="{{ .Title | default $alt }}" alt="{{ $alt }}"{{- end -}}
  {{- with .Width }} width="{{ . }}"{{- end -}}
  {{- with .Height }} height="{{ . }}"{{- end -}}
  {{- with $class }} class="{{ trim . " " }}"{{- end -}}
  {{- with $style -}}{{ . }}{{- end -}}
  {{- with $onload -}}{{ . }}{{- end -}}
  {{- with $onerror -}}{{ . }}{{- end -}}
/>
{{- if .Linked -}}
  </a>
{{- end -}}