Dash in front-matter keys breaks the syntax highlighting of the title

[feliksik]

Observed vs. expected behavior

When using frontmatter, the title is not highlighted in the editor (it's black). This makes it look like you're doing it wrong -- but you're doing it exactly right.

I expect it to be Blue, like it is without frontmatter.

Additionally, like the VS Code asciidoc plugin, I would expect squiggly error-lines and the "level 0 sections can only be used when doctype is book" error when the asciidoc is incorrect.

Steps to reproduce

Correct frontmatter, incorrect highlighting:

---
this: is frontmatter
key: value
---
= My title

The title is black, should be blue. 

In the document below, blue highlighting of title makes it look correct, but this is incorrect asciidoc for non-book doctype ("asciidoctor: ERROR: ../myfile.adoc: line 0: level 0 sections can only be used when doctype is book")

---
this: is frontmatter
key: value
---

= My title

The title is blue, but is incorrect asciidoc for non-book format. 

Environment

Plugin Version: 0.41.13

IntelliJ Details: IntelliJ IDEA 2023.3.5 (Ultimate Edition) Build #IU-233.14808.21, built on March 12, 2024

[ahus1]

Thanks for reporting this. I'm trying to reproduce it locally, but yet without success, so I might be missing something. Some additional information might help:

• Please share a screenshot of the editor + its preview
• Do you have an .asciidoctorconfig file? I wonder if its contents interfere here - it should work as long as you only for example set attributes there.

I would expect squiggly error-lines and the "level 0 sections can only be used when doctype is book" error when the asciidoc is incorrect.

I don't agree that the level 0 section warning is expected with the example you provided: While only a book is allowed to have multiple level 0 sections, an article is allowed to have a title which looks basically the same. As long as there is only a title, then there shouldn't be a warning.

This is what I see:

[feliksik]

You are correct, my example was wrong.

It turns out it's a dash in a frontmatter key breaks the highlighting; so it's a subtle bug.

---
dashed-key-breaks-highting: blah
this: is frontmatter
key: value
---
= My title

The title is black, should be blue.

[ahus1]

The next version of the plugin will use a better heuristic to recognize YAML in the frontmatter.

I'll update this issue once a pre-release is available.

[feliksik]

Thanks!!

[ahus1]

Plugin-version 0.41.14 is now available with a fix. It should be available from the JetBrains markeplace soon.

The it is also available from GitHub releases.