tpl: Add optional "title" attribute to iframe in Vimeo shortcode

Add an optional "title" attribute to the iframe in the vimeo shortcode. If one is not given, the title attribute will default to "vimeo video". It is imperative for iframes to have a non-empty "title" attribute in order to meet WCAG2.0 accessibility guidelines https://www.w3.org/TR/WCAG20-TECHS/H64.

4 files changed, 21 insertions, 11 deletions

diff --git a/docs/content/en/content-management/shortcodes.md b/docs/content/en/content-management/shortcodes.md
index 3be1c6f9e..94966343a 100644
--- a/docs/content/en/content-management/shortcodes.md
+++ b/docs/content/en/content-management/shortcodes.md
@@ -345,10 +345,10 @@ Using the preceding `vimeo` example, the following HTML will be added to your re
 {{< /output >}}
 
 {{% tip %}}
-If you want to further customize the visual styling of the YouTube or Vimeo output, add a `class` named parameter when calling the shortcode. The new `class` will be added to the `<div>` that wraps the `<iframe>` *and* will remove the inline styles. Note that you will need to call the `id` as a named parameter as well.
+If you want to further customize the visual styling of the YouTube or Vimeo output, add a `class` named parameter when calling the shortcode. The new `class` will be added to the `<div>` that wraps the `<iframe>` *and* will remove the inline styles. Note that you will need to call the `id` as a named parameter as well. You can also give the vimeo video a descriptive title with `title`. 
 
 ```
-{{</* vimeo id="146022717" class="my-vimeo-wrapper-class" */>}}
+{{</* vimeo id="146022717" class="my-vimeo-wrapper-class" title="My vimeo video" */>}}
 ```
 {{% /tip %}}
 
diff --git a/hugolib/embedded_shortcodes_test.go b/hugolib/embedded_shortcodes_test.go
index b34a767ca..64f2203e9 100644
--- a/hugolib/embedded_shortcodes_test.go
+++ b/hugolib/embedded_shortcodes_test.go
@@ -212,17 +212,27 @@ func TestShortcodeVimeo(t *testing.T) {
 	}{
 		{
 			`{{< vimeo 146022717 >}}`,
-			"(?s)\n<div style=\".*?\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" style=\".*?\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>\n",
+			"(?s)\n<div style=\".*?\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" style=\".*?\" title=\"vimeo video\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>\n",
 		},
 		// set class
 		{
 			`{{< vimeo 146022717 video >}}`,
-			"(?s)\n<div class=\"video\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>\n",
+			"(?s)\n<div class=\"video\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" title=\"vimeo video\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>\n",
+		},
+		// set vimeo title
+		{
+			`{{< vimeo 146022717 video my-title >}}`,
+			"(?s)\n<div class=\"video\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" title=\"my-title\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>\n",
 		},
 		// set class (using named params)
 		{
 			`{{< vimeo id="146022717" class="video" >}}`,
-			"(?s)^<div class=\"video\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>",
+			"(?s)^<div class=\"video\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" title=\"vimeo video\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>",
+		},
+		// set vimeo title (using named params)
+		{
+			`{{< vimeo id="146022717" class="video" title="my vimeo video" >}}`,
+			"(?s)^<div class=\"video\">.*?<iframe src=\"https://player.vimeo.com/video/146022717\" title=\"my vimeo video\" webkitallowfullscreen mozallowfullscreen allowfullscreen>.*?</iframe>.*?</div>",
 		},
 	} {
 		var (
diff --git a/tpl/tplimpl/embedded/templates.autogen.go b/tpl/tplimpl/embedded/templates.autogen.go
index 50016764f..2bdb56b5b 100644
--- a/tpl/tplimpl/embedded/templates.autogen.go
+++ b/tpl/tplimpl/embedded/templates.autogen.go
@@ -466,10 +466,10 @@ if (!doNotTrack) {
 {{ template "_internal/shortcodes/vimeo_simple.html" . }}
 {{- else -}}
 {{ if .IsNamedParams }}<div {{ if .Get "class" }}class="{{ .Get "class" }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
-  <iframe src="https://player.vimeo.com/video/{{ .Get "id" }}" {{ if not (.Get "class") }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
+  <iframe src="https://player.vimeo.com/video/{{ .Get "id" }}" {{ if not (.Get "class") }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}{{ if .Get "title"}}title="{{ .Get "title" }}"{{ else }}title="vimeo video"{{ end }} webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
  </div>{{ else }}
-<div {{ if len .Params | eq 2 }}class="{{ .Get 1 }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
-  <iframe src="https://player.vimeo.com/video/{{ .Get 0 }}" {{ if len .Params | eq 1 }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
+<div {{ if gt (len .Params) 1 }}class="{{ .Get 1 }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
+  <iframe src="https://player.vimeo.com/video/{{ .Get 0 }}" {{ if len .Params | eq 1 }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}{{ if len .Params | eq 3 }}title="{{ .Get 2 }}"{{ else }}title="vimeo video"{{ end }} webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
  </div>
 {{ end }}
 {{- end -}}
diff --git a/tpl/tplimpl/embedded/templates/shortcodes/vimeo.html b/tpl/tplimpl/embedded/templates/shortcodes/vimeo.html
index 94f03470e..1680c1694 100644
--- a/tpl/tplimpl/embedded/templates/shortcodes/vimeo.html
+++ b/tpl/tplimpl/embedded/templates/shortcodes/vimeo.html
@@ -4,10 +4,10 @@
 {{ template "_internal/shortcodes/vimeo_simple.html" . }}
 {{- else -}}
 {{ if .IsNamedParams }}<div {{ if .Get "class" }}class="{{ .Get "class" }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
-  <iframe src="https://player.vimeo.com/video/{{ .Get "id" }}" {{ if not (.Get "class") }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
+  <iframe src="https://player.vimeo.com/video/{{ .Get "id" }}" {{ if not (.Get "class") }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}{{ if .Get "title"}}title="{{ .Get "title" }}"{{ else }}title="vimeo video"{{ end }} webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
  </div>{{ else }}
-<div {{ if len .Params | eq 2 }}class="{{ .Get 1 }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
-  <iframe src="https://player.vimeo.com/video/{{ .Get 0 }}" {{ if len .Params | eq 1 }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
+<div {{ if gt (len .Params) 1 }}class="{{ .Get 1 }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
+  <iframe src="https://player.vimeo.com/video/{{ .Get 0 }}" {{ if len .Params | eq 1 }}style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }}{{ if len .Params | eq 3 }}title="{{ .Get 2 }}"{{ else }}title="vimeo video"{{ end }} webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
  </div>
 {{ end }}
 {{- end -}}