48 lines
1.7 KiB
HTML
48 lines
1.7 KiB
HTML
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{{/* get file that matches the filename as specified as src="" in shortcode */}}
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{{ $src := .Page.Resources.GetMatch (printf "*%s*" (.Get "src")) }}
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{{/* set image sizes, these are hardcoded for now, x dictates that images are resized to this width */}}
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{{ $tinyw := default "500x" }}
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{{ $smallw := default "800x" }}
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{{ $mediumw := default "1200x" }}
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{{ $largew := default "1500x" }}
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{{/* resize the src image to the given sizes */}}
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{{ .Scratch.Set "tiny" ($src.Resize $tinyw) }}
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{{ .Scratch.Set "small" ($src.Resize $smallw) }}
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{{ .Scratch.Set "medium" ($src.Resize $mediumw) }}
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{{ .Scratch.Set "large" ($src.Resize $largew) }}
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{{/* add the processed images to the scratch */}}
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{{ $tiny := .Scratch.Get "tiny" }}
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{{ $small := .Scratch.Get "small" }}
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{{ $medium := .Scratch.Get "medium" }}
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{{ $large := .Scratch.Get "large" }}
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{{/* only use images smaller than or equal to the src (original) image size, as Hugo will upscale small images */}}
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{{/* set the sizes attribute to (min-width: 35em) 1200px, 100vw unless overridden in shortcode */}}
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<img
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{{ with .Get "sizes" }}sizes='{{.}}'{{ else }}sizes="(min-width: 35em) 1200px, 100vw"{{ end }}
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srcset='
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{{ if ge $src.Width "500" }}
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{{ with $tiny.RelPermalink }}{{.}} 500w{{ end }}
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{{ end }}
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{{ if ge $src.Width "800" }}
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{{ with $small.RelPermalink }}, {{.}} 800w{{ end }}
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{{ end }}
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{{ if ge $src.Width "1200" }}
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{{ with $medium.RelPermalink }}, {{.}} 1200w{{ end }}
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{{ end }}
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{{ if ge $src.Width "1500" }}
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{{ with $large.RelPermalink }}, {{.}} 1500w {{ end }}
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{{ end }}'
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{{ if .Get (print $medium) }}
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src="{{ $medium.RelPermalink }}"
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{{ else }}
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src="{{ $src.RelPermalink }}"
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{{ end }}
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{{ with .Get "alt" }}alt="{{.}}"{{ else }}alt=""{{ end }}>
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