How can I repair a figure caption set using a multiline content block with leading and trailing whitespace?

Questions
1

I’ve read a few posts on this, including this issue posted by @Andrew, but I’m still unclear on the best way to fix it (aside from avoiding it, which isn’t an option for now).

In short, I’m working with a Quarto-typst template and through a combination of their lua filters and our Julia code, our figure captions in the intermediate .typ file look like this:

#figure(
  box(width: 1in,height: 1in, fill: blue),
  caption: [
    #lorem(15)
  ]
)

The newlines inside [ ] result in additional whitespace being prepended to the outline entry for the figure.

image
image1108×410 31.2 KB

It’s less of an issue for short captions, but it’s definitely noticeable for longer captions, which are common for our reports. I was able to resolve the issue using a combination of content-to-string conversion and show figure rule:

#let stringify(content) = {
    if content.has("text") {
        if type(content.text) == str {
            content.text
        } else {
            stringify(content.text)
        }
    } else if content.has("children") {
        content.children.map(stringify).join("")
    } else if content.has("body") {
        stringify(content.body)
    } else if content == [ ] {
        ""
    }
}

#show figure: it => {
  if it.kind == "mod-figure" {return it}
  figure(
    it.body,
    caption: stringify(it.caption.body),
    kind: "mod-figure",
    supplement: [Figure]
  )
}

My question is whether there’s a better way to handle this?

2

You can use a zero-length weak space to remove the unwanted space. For example we can modify the default entry format

#show outline.entry: it => link(
  it.element.location(),
  it.indented(it.prefix(), it.inner()),
)

and add the weak spacing before the inner part:

#show outline.entry: it => link(
  it.element.location(),
  it.indented(it.prefix(), h(0pt, weak: true) + it.inner()),
)

#outline(target: figure)

#figure(
  box(width: 1in,height: 1in, fill: blue),
  caption: [ #lorem(15) ]
)

image
image375×143 28.9 KB

2 Likes
3

Thanks sijo, that works well and with a lot less code. :slightly_smiling_face:

1 Like
4

You mean the spaces are added upstream, so you can’t fix the root problem? Until they fix it themselves, or something.

5

You mean the spaces are added upstream, so you can’t fix the root problem?

Yeah. When you add a figure to Quarto,

---
format:
    typst:
        keep-typ: true
---

![A Figure](myplot.svg)

the default output looks like this:

#figure([
#box(image("myplot.svg"))
], caption: figure.caption(
position: bottom, 
[
A Figure
]), 
kind: "quarto-float-fig", 
supplement: "Figure", 
)
6

That’s sad. Better report it, if not already.