docs: backport layouts updates from the main branch

site/layouts/partials/home/masthead.html

@@ -18,6 +18,6 @@
         </p>
       </div>
     </div>
-    {{ partial "ads.html" . }}
+    {{ partial "ads" . }}
   </div>
 </main>

site/layouts/partials/scripts.html

@@ -13,7 +13,7 @@
 
 {{- $vendor := resources.Match "js/vendor/*.js" -}}
 {{- $js := resources.Match "js/*.js" -}}
-{{- $targetDocsJSPath := printf "/docs/%s/assets/js/docs.js" .Site.Params.docs_version -}}
+{{- $targetDocsJSPath := path.Join "/docs" .Site.Params.docs_version "assets/js/docs.js" -}}
 {{- $docsJs := append $js $vendor | resources.Concat $targetDocsJSPath -}}
 
 {{- if eq hugo.Environment "production" -}}

site/layouts/partials/stylesheet.html

@@ -11,7 +11,7 @@
 {{- end -}}
 
 {{- if (ne .Page.Layout "examples") }}
-{{- $targetDocsCssPath := printf "/docs/%s/assets/css/docs.css" .Site.Params.docs_version -}}
+{{- $targetDocsCssPath := path.Join "/docs" .Site.Params.docs_version "assets/css/docs.css" -}}
 {{- $sassOptions := dict "targetPath" $targetDocsCssPath "outputStyle" "expanded" "precision" 6 -}}
 {{- $postcssOptions := dict "use" "autoprefixer" "noMap" true -}}
 

site/layouts/shortcodes/callout.html

 {{- /*
-  Usage: `callout "type"`,
-  where type is one of info (default), danger, warning
+  Usage: `callout "type"`, where `type` is one of info (default), danger, or warning
 */ -}}
 
 {{- $css_class := .Get 0 | default "info" -}}

site/layouts/shortcodes/docsref.html

-{{- relref . ((printf "docs/%s%s" $.Site.Params.docs_version (.Get 0)) | relURL) -}}
+{{- relref . ((path.Join "docs" $.Site.Params.docs_version (.Get 0)) | relURL) -}}

site/layouts/shortcodes/example.html

 {{- /*
-  Usage: `example [args]`
+  Usage: `example args`
 
-  `args` are optional and can be one of the following:
-    id: the `div`'s id - default: ""
-    class: any extra class(es) to be added to the `div` - default ""
-    show_preview: if the preview should be output in the HTML - default: `true`
-    show_markup: if the markup should be output in the HTML - default: `true`
+  `args` are all optional and can be one of the following:
+    * id: the `div`'s id - default: ""
+    * class: any extra class(es) to be added to the `div` - default: ""
+    * show_preview: if the preview should be output in the HTML - default: `true`
+    * show_markup: if the markup should be output in the HTML - default: `true`
 */ -}}
 
+{{- $id := .Get "id" -}}
+{{- $class := .Get "class" -}}
 {{- $lang := .Get "lang" | default "html" -}}
 {{- $show_preview := .Get "show_preview" | default true -}}
 {{- $show_markup := .Get "show_markup" | default true -}}
 {{- $input := .Inner -}}
 
 {{- if eq $show_preview true -}}
-<div{{ with .Get "id" }} id="{{ . }}"{{ end }} class="bd-example{{ with .Get "class" }} {{ . }}{{ end }}">
+<div{{ with $id }} id="{{ . }}"{{ end }} class="bd-example{{ with $class }} {{ . }}{{ end }}">
   {{- $input -}}
 </div>
 {{- end -}}
 
 {{- if eq $show_markup true -}}
-  {{- $content := replaceRE `<svg class="bd\-placeholder\-img(?:\-lg)?(?: *?bd\-placeholder\-img\-lg)? ?(.*?)".*?<\/svg>\n` `<img src="..." class="$1" alt="...">` $input -}}
+  {{- $content := replaceRE `<svg class="bd-placeholder-img(?:-lg)?(?: *?bd-placeholder-img-lg)? ?(.*?)".*?<\/svg>\n` `<img src="..." class="$1" alt="...">` $input -}}
   {{- $content = replaceRE ` (class=" *?")` "" $content -}}
   {{- highlight (trim $content "\n") $lang "" -}}
 {{- end -}}

site/layouts/shortcodes/param.html

 {{- /*
   Work around wrong escapes in integrity attributes.
+  Original: https://github.com/gohugoio/hugo/blob/master/tpl/tplimpl/embedded/templates/shortcodes/param.html
 */ -}}
 
 {{- $name := .Get 0 -}}
 {{- with $name -}}
 {{- $value := $.Page.Param . -}}
-{{- if in $name "_hash" -}}
+{{- /* If any parameter ends with `_hash`, mark the string as safe HTML */ -}}
+{{- if (strings.HasSuffix $name "_hash") -}}
   {{- $value = $value | safeHTML -}}
 {{- end -}}
 {{- with $value }}{{ . }}{{ else }}{{ errorf "Param %q not found: %s" $name $.Position }}{{ end -}}

site/layouts/shortcodes/placeholder.html

 {{- /*
   Usage: `placeholder args`
 
-  args can be one of the following:
-    title: Used in the SVG `title` tag, default "Placeholder"
-    text: The text to show in the image - default: "width x height"
-    class: default: "bd-placeholder-img"
-    color: The text color (foreground) - default: "#dee2e6"
-    background: The background color - default: "#868e96"
-    width: default: 100%
-    height: default: 180px
+  `args` are all optional and can be one of the following:
+    * title: Used in the SVG `title` tag - default: "Placeholder"
+    * text: The text to show in the image - default: "width x height"
+    * class: Class to add to the `svg` - default: "bd-placeholder-img"
+    * color: The text color (foreground) - default: "#dee2e6"
+    * background: The background color - default: "#868e96"
+    * width: default: "100%"
+    * height: default: "180px"
 */ -}}
 
 {{- $grays := $.Site.Data.grays -}}
+{{- $default_color := (index $grays 2).hex -}}
+{{- $default_background := (index $grays 5).hex -}}
+
 {{- $title := .Get "title" | default "Placeholder" -}}
 {{- $class := .Get "class" -}}
-{{- $color := .Get "color" | default (index $grays 2).hex -}}
-{{- $background := .Get "background" | default (index $grays 5).hex -}}
+{{- $color := .Get "color" | default $default_color -}}
+{{- $background := .Get "background" | default $default_background -}}
 {{- $width := .Get "width" | default "100%" -}}
 {{- $height := .Get "height" | default "180" -}}
 {{- $text := .Get "text" | default (printf "%sx%s" $width $height) -}}
@@ -24,7 +27,7 @@
 {{- $show_text := not (eq $text "false") -}}
 
 <svg class="bd-placeholder-img{{ with $class }} {{ . }}{{ end }}" width="{{ $width }}" height="{{ $height }}" xmlns="http://www.w3.org/2000/svg"{{ if (or $show_title $show_text) }} role="img" aria-label="{{ if $show_title }}{{ $title }}{{ if $show_text }}: {{ end }}{{ end }}{{ if ($show_text) }}{{ $text }}{{ end }}"{{ else }} aria-hidden="true"{{ end }} preserveAspectRatio="xMidYMid slice" focusable="false">
-  {{- if $show_title -}}<title>{{ $title }}</title>{{- end -}}
+  {{- if $show_title }}<title>{{ $title }}</title>{{ end -}}
   <rect width="100%" height="100%" fill="{{ $background }}"/>
-  {{- if $show_text -}}<text x="50%" y="50%" fill="{{ $color }}" dy=".3em">{{ $text }}</text>{{- end -}}
+  {{- if $show_text }}<text x="50%" y="50%" fill="{{ $color }}" dy=".3em">{{ $text }}</text>{{ end -}}
 </svg>

site/layouts/shortcodes/year.html

-{{- /*
-  Output the current year
-*/ -}}
+{{- /* Outputs the current year */ -}}
 
 {{- now.Format "2006" -}}