update

layouts/shortcodes/picture.html

@@ -0,0 +1,45 @@
+<!--
+    Shortcode to render an image as part of content where the place in text flow is important.
+
+    @params src Image `src` path.
+    @params link  URI or Page Resource to wrap image in. Optional.
+    @params rel Force relationship value. Optional.
+-->
+
+<!-- Variable assignment -->
+
+{{- $src := $.Page.Resources.GetMatch ( .Get "src" ) -}}
+{{- $linkedResource := $.Page.Resources.GetMatch ( .Get "link" ) -}}
+{{- $valid_rel_values := partialCached "util/get_valid_rel_values.html.tmpl" . -}}
+
+<!-- Validation -->
+
+{{- if ( not $src ) -}}
+  {{- errorf "No Page Resource found for src %q (%q)" ( .Get "src" ) .Page.File.Path -}}
+{{- end -}}
+
+{{- if not ( eq $src.ResourceType "image" ) -}}
+    {{- errorf "Resource %q has resource type %q (expected \"image\") (%q)" ( .Get "src" ) $src.ResourceType .Page.File.Path -}}
+{{- end -}}
+
+{{- with .Get "rel" -}}
+    {{- if not ( in $valid_rel_values . ) -}}
+        {{- errorf "Invalid rel value %q (%q)" . .Page.File.Path -}}
+    {{- end -}}
+{{- end -}}
+
+<!-- Rendering -->
+
+{{- if .Get "link" -}}
+    {{- if $linkedResource -}}
+        <a href="{{- $linkedResource.RelPermalink -}}"{{- with .Get "rel" }} rel="{{- . -}}"{{- end -}}>
+    {{- else -}}
+        <a href="{{- .Get "link" -}}">
+    {{- end -}}
+{{- end -}}
+
+{{- partial "media/picture.html.tmpl" $src -}}
+
+{{- if .Get "link" -}}
+    </a>
+{{- end -}}