91 lines
3.2 KiB
HTML
91 lines
3.2 KiB
HTML
<!--
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# Responsive images and resizing
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Our picture width is 700 css pixels. "Retina" screens have 2 device pixel ratio
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(dpr), crazy folks have 4. So the maximum width of the picture we can possibly
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care about is 700*4=2800px.
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-->
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<!-- image -->
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{{ $src := resources.GetMatch (.Get "src") | resources.Fingerprint }}
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{{ $jmax := $src | resources.Fingerprint }}
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{{ $j350 := $src.Resize "350x" }}
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{{ $j700 := $src.Resize "700x" }}
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{{ $j1400 := $src.Resize "1400x" }}
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{{ $j2800 := $src.Resize "2800x" }}
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{{ $width := cond (eq (.Get "half") "true") "350px" "700px" }}
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{{ with .Get "hint" }}
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{{ else }}
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{{ errorf "missing value for param 'hint': %s" .Position }}
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{{ end }}
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{{ $hint := .Get "hint" }}
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{{ $wmax := $src.Resize (printf "%dx%d webp" $src.Width $src.Height) }}
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{{ $w350 := $src.Resize (print "350x webp " $hint ) }}
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{{ $w700 := $src.Resize (print "700x webp " $hint ) }}
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{{ $w1400 := $src.Resize (print "1400x webp " $hint ) }}
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{{ $w2800 := $src.Resize (print "2800x webp " $hint ) }}
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<figure {{ with .Get "class" }}class="{{.}}"{{ end }}>
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{{ with .Get "link" }}<a href="{{ . }}">{{ end }}
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<picture>
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<source type="image/webp"
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sizes="(max-width: 600px) 350px, {{ $width }}"
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{{- if eq $hint "graph" }}
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srcset='{{ $wmax.RelPermalink}} {{ $wmax.Width}}w'
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{{- else }}
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srcset='
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{{- if ge $src.Width "350" }}
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{{ with $w350.RelPermalink }}{{.}} 350w{{ end }}
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{{- end }}
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{{- if ge $src.Width "700" }}
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{{ with $w700.RelPermalink }}, {{.}} 700w{{ end }}
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{{- end }}
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{{- if ge $src.Width "1400" }}
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{{ with $w1400.RelPermalink }}, {{.}} 1400w{{ end }}
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{{- end }}
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{{- if ge $src.Width "2800" }}
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{{ with $w2800.RelPermalink }}, {{.}} 2800w{{ end }}
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{{- end }}'
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{{- end }}
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/>
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<img
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sizes="(max-width: 600px) 350px, 700px"
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{{- if eq $hint "graph" }}
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srcset='{{ $jmax.RelPermalink}} {{ $jmax.Width}}w'
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{{- else }}
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srcset='
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{{- if ge $src.Width "350" }}
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{{ with $j350.RelPermalink }}{{.}} 350w{{ end }}
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{{- end }}
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{{- if ge $src.Width "700" }}
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{{ with $j700.RelPermalink }}, {{.}} 700w{{ end }}
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{{- end }}
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{{- if ge $src.Width "1400" }}
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{{ with $j1400.RelPermalink }}, {{.}} 1400w{{ end }}
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{{- end }}
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{{- if ge $src.Width "2800" }}
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{{ with $j2800.RelPermalink }}, {{.}} 2800w{{ end }}
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{{- end }}'
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{{- end }}
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src="{{ $j700.RelPermalink }}"
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{{ if or (.Get "alt") (.Get "caption") }}alt="{{ with .Get "alt" }}{{ . }}{{ else }}{{ .Get "caption" }}{{ end }}"{{ end }}
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/>
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</picture>
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{{ if .Get "link" }}</a>{{ end }}
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{{ if or (or (.Get "title") (.Get "caption")) (.Get "attr") }}
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<figcaption>{{ if isset .Params "title" }}
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<h4>{{ .Get "title" }}</h4>{{ end }}
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{{ if or (.Get "caption") (.Get "attr") }}<p>
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{{ .Get "caption" }}
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{{ with .Get "attrlink" }}<a href="{{ . }}"> {{ end }}
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{{ .Get "attr" }}
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{{ if .Get "attrlink" }}</a> {{ end }}
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</p> {{ end }}
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</figcaption>
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{{ end }}
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</figure>
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<!-- image -->
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