Michael Stapelberg
103 lines
3.6 KiB
Go Template
103 lines
3.6 KiB
Go Template
{{- /* 1. set standard effects */}}
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{{- $effects := dict "download" false "target" false }}
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{{- $attributes := .attributes | default dict }}
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{{- /* 2. stack configured site effects */}}
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{{- if .page.Site.Params.linkeffects }}
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{{- $effects = merge $effects .page.Site.Params.linkeffects }}
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{{- end }}
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{{- /* 2.1 special case to stack target effect and add external URL marker to attributes */}}
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{{- $u := urls.Parse .url }}
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{{- if $u.IsAbs }}
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{{- $attributes = merge $attributes (dict "rel" "external") }}
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{{- if isset .page.Site.Params "externallinktarget" }}
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{{- $target := trim .page.Site.Params.externallinktarget "\n\r\t " }}
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{{- if in (slice "") $target }}
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{{- $target = false }}
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{{- else if in (slice "false" false 0) $target }}
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{{- $target = "_self" }}
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{{- else if in (slice "true" true 1) $target }}
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{{- $target = "_blank" }}
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{{- end }}
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{{- $effects = merge $effects (dict "target" $target) }}
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{{- end }}
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{{- end }}
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{{- /* 3. stack pages frontmatter effects */}}
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{{- if .page.Params.linkeffects }}
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{{- $effects = merge $effects .page.Params.linkeffects }}
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{{- end }}
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{{- /* 3.1 special case to stack target effect of pages frontmatter */}}
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{{- if $u.IsAbs }}
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{{- if isset .page.Params "externallinktarget" }}
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{{- $target := trim .page.Params.externallinktarget "\n\r\t " }}
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{{- if in (slice "") $target }}
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{{- $target = false }}
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{{- else if in (slice "false" false 0) $target }}
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{{- $target = "_self" }}
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{{- else if in (slice "true" true 1) $target }}
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{{- $target = "_blank" }}
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{{- end }}
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{{- $effects = merge $effects (dict "target" $target) }}
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{{- end }}
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{{- end }}
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{{- /* 4. stack URL query parameter */}}
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{{- if $u.RawQuery }}
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{{- /* 4.1 stack "classes" parameter effects; handle "no" prefix */}}
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{{- if $u.Query.Has "classes" }}
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{{- $classes := slice | append (split ($u.Query.Get "classes") ",") }}
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{{- range $classes }}
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{{- $k := . }}
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{{- if isset $effects $k }}
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{{- $v := true }}
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{{- if strings.HasPrefix $k "no" }}
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{{- $k := strings.TrimPrefix "no" $k }}
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{{- $v := false }}
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{{- end }}
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{{- $effects = merge $effects (dict $k $v) }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{- /* 4.2 stack other effect parameter; no handling for "no" prefix */}}
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{{- range $k, $v := $effects }}
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{{- if $u.Query.Has $k }}
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{{- $paramValue := $u.Query.Get $k }}
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{{- $newValue := true }}
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{{- if eq $paramValue "" }}
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{{- $newValue = true }}
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{{- else if eq $paramValue "true" }}
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{{- $newValue = true }}
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{{- else if eq $paramValue "false" }}
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{{- $newValue = false }}
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{{- else }}
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{{- $newValue = $paramValue }}
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{{- end }}
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{{- $effects = merge $effects (dict $k $newValue) }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{- /* manually translate effects to HTML attributes */}}
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{{- /* "class" should only contain boolean effects if they are true */}}
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{{- $classes := slice }}
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{{- range $k, $v := $effects }}
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{{- if $v }}
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{{- if eq (printf "%T" $v) "bool" }}
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{{- $classes = $classes | append $k }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{- if $attributes.class }}{{ $classes = $classes | append (split $attributes.class " ") }}{{ end }}
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{{- $classes = delimit $classes " " }}
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{{- $attributes = merge $attributes (dict "class" $classes ) }}
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{{- $attributes = merge $attributes (dict "href" .url) }}
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{{- $attributes = merge $attributes (dict "download" $effects.download) }}
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{{- $attributes = merge $attributes (dict "target" $effects.target) }}
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{{- return $attributes }} |