Kovasky Buezo
61 lines
2.6 KiB
HTML
61 lines
2.6 KiB
HTML
{{/* Parameter Parsing */}}
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{{ $usage := `lazyimg:
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Usage like:
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- {{ partial "lazyimg" "image.jpg" }}
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- {{ partial "lazyimg" (resources.Get "image.jpg") }}
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...or more verbose by specifying a dict overriding the site.Params.lazyimg, e.g.:
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- {{ partial "lazyimg" (dict "resizer" "auto" "renderer" "lqip") }}
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- {{ partial "lazyimg" (dict "img" "image.jpg" "responsiveSizes" (slice "320px" "640px") "resizer" "responsive") }}
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Please ensure that image exists in ./assets directory.
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` }}
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{{/* Parse and normalize input parameters: */}}
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{{ $params := merge site.Params.lazyimg (dict
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"img" .
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"resizer" (default "responsive" site.Params.lazyimg.resizer)
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"renderer" (default "lqip" site.Params.lazyimg.renderer)
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)}}
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{{ if reflect.IsMap . }}
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{{ $userParams := dict }}
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{{/* Normalize by transforming all keys to lower-case: */}}
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{{ range $k, $v := . -}}
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{{ $userParams = $userParams | merge (dict (lower $k) $v) }}
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{{- end -}}
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{{ $params = merge $params $userParams }}
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{{ end }}
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{{/* Attempt to load image resource: */}}
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{{ $resType := (printf "%T" $params.img) }}
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{{ $resLoaded := in $resType "resource" }}
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{{ if not $resLoaded }}
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{{ with $res := resources.Get $params.img }}
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{{ $params = merge $params (dict "img" $res) }}
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{{ $resLoaded = true }}
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{{ end }}
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{{ end }}
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{{/* Handle error if not loaded yet: */}}
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{{ if not $resLoaded }}
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{{/* Try if error-handler is able to resolve it */}}
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{{ $params = partial (printf "error-handler/%s" site.Params.lazyimg.errorHandler) $params }}
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{{ if $params }}
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{{ $resLoaded = in (printf "%T" $params.img) "resource" }}
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{{ end }}
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{{ end }}
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{{/* Only proceed if resource has been loaded: */}}
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{{ if $resLoaded }}
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{{/* Special handling for WebP renderers: */}}
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{{ if in $params.renderer "webp" }}
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{{/* Override user-supplied target format */}}
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{{ $resizeOptionsWebP := printf "%s webp" ($params.resizeoptions | replaceRE "(jpg|png|tif|bmp|gif)" "") }}
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{{ $paramsWebP := merge $params (dict "resizeoptions" $resizeOptionsWebP) }}
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{{ $imagesWebP := partial (printf "resizer/%s" $params.resizer) $paramsWebP }}
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{{ $imagesRegular := partial (printf "resizer/%s" $params.resizer) $params }}
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{{ partial (printf "renderer/%s" $params.renderer) (merge $params (dict "imgDict" $imagesWebP "imgDictFallback" $imagesRegular)) }}
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{{ else }}
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{{ $sizes := partial (printf "resizer/%s" $params.resizer) $params }}
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{{ partial (printf "renderer/%s" $params.renderer) (merge $params (dict "imgDict" $sizes)) }}
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{{ end }}
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{{ end }} |