Shortcode improvements

- New shortcode for quotation. Not using this yet.
- Make picture shortcode round image dimensions to integer values.
- Make quotecaption support code snippets borrowed from other places.
  Not using this yet.

layouts/shortcodes/picture.html

@@ -13,8 +13,8 @@
 {{- $img_width := $light_png.Width -}}
 {{- $img_height := $light_png.Height -}}
 {{- with (.Get "sf") -}}
-	{{- $img_width = (mul $img_width . ) -}}
-	{{- $img_height = (mul $img_height . ) -}}
+	{{- $img_width = (mul $img_width . | math.Round) -}}
+	{{- $img_height = (mul $img_height . | math.Round ) -}}
 	{{- if eq . 2 -}}
 		{{- $isPix = true -}}
 	{{- end -}}

layouts/shortcodes/quotation.html

@@ -0,0 +1,7 @@
+{{- $itemprop := "mentions" -}}
+{{- with .Get "itemprop" -}}
+	{{- $itemprop = . -}}
+{{- end -}}
+<figure itemprop="{{ $itemprop }}"{{ with .Get "id" }} id="{{ . }}"{{ end }} itemscope itemtype="https://schema.org/Quotation">
+{{ .Inner | markdownify }}
+</figure>

layouts/shortcodes/quotecaption.html

@@ -1,5 +1,11 @@
 <figcaption>
-&mdash;
+{{- with .Parent -}}
+	{{- if eq .Name "quotation" -}}
+		&mdash;
+	{{- else if eq .Name "codefigure" -}}
+		Taken from
+	{{- end -}}
+{{- end -}}
 <span class="h-cite" itemprop="citation" role="doc-credit">
 	<span itemprop="isPartOf" itemscope itemtype="https://schema.org/{{ .Get "partOfType" }}">
 		{{ .Inner | markdownify | safeHTML }}