How to check if .Inner is empty

support
1

I am trying to write a {{< gallery >}} shortcode that will either generate a gallery with all the images in a directory you define, the contents you define via .Inner, or simply all the image resources related to the page. Here are the forms I’m trying to support:

  1. {{< gallery dir="/gallery/alaska/" />}} - specified directory
  2. {{< gallery >}} {{< figure src="image1.jpg" >}} {{< /gallery >}} - specified inner content
  3. {{< gallery >}} - use all the image resources for tht page

I can process the first two, but it is not clear to me how to determine if there nothing in the .Inner variable so I can process form 3 above. I would expect to do something like the following:

{{ with (.Get "dir") }}
  // do stuff with the specified directory (works fine)
{{ else }}
  {{ if .Inner }}
	{{ .Inner }} // Always executes
  {{ else }}
    // do stuff related to resources in this page
  {{ end }}
{{ end }}

How do I detect a bare shortcode with no arguments nor inner content?

2

with should be what you look for.

And judging from your first line you probably knew that. Is this not working? Replace the {{ if .Inner }} with a {{ with .Inner }}.

3

If I replace the {{ if .Inner }} with a {{ with .Inner }} , I get an error:

executing "shortcodes/gallery.html" at <.Inner>: can't evaluate field Inner in type template.HTML
4

Because inside the with the .Inner is just an . :wink:

{{ with (.Get "dir") }}

{{ else }}
  {{ with .Inner }}
	{{ . }} 
  {{ else }}

  {{ end }}
{{ end }}
5

Oh…duh. OK. The following always displays “Check 1” for an empty shortcode of {{< gallery >}}:

{{ with (.Get "dir") }}
  <h5>Process Dir</h5>
{{ else }}
  {{ with .Inner }}
    <h5>Check 1</h5>
    {{ . }}
  {{ else }}
    <h5>Check 2</h5>
  {{ end }}
{{ end }}

I’m expecting “Check 2” for an empty shortcode.

6

Note:

{{< gallery >}}
{{< /gallery >}}

Is NOT empty. It’s a line break. Whitespace is content. You might work through this by using (trim .Inner "\n").

Other than that: post a sample repo so we can look into the issue.

7

I’m only specifying {{< gallery >}} on a line by itself. There are no open/close shortcodes.

---
front matter
---
This is my gallery.
{{< load-photoswipe >}}
{{< gallery >}}

The above is essentially my test page. There are about a dozen images in the same directory as the page. I’d like to display all the images in that posts directory.

8

{{ .Inner }} implies that you have at least {{< gallery >}}{{< /gallery >}}, I don’t think you can have shortcodes that close itself AND take .inner codings. So if you want to support {{< gallery >}}something{{< /gallery >}} you will have to have closing tags.

1 Like
9

That’s it…you have to call it as an empty element - {{< gallery />}}.

Thanks for walking me through this!

10

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