Add ICU syntax highlighting with XML

[dakur]

Describe the issue

In icu-message-format docs, there are useful icu-flags mentioned, but there is no explanation on how to use it.

I've tried icu-message-format,icu-flags:xml

but that didn't seem to work (icu syntax got highlighted, but XML tags didn't):

I already tried

• [X] I've read and searched the documentation.
• [X] I've searched for similar issues in this repository.

Steps to reproduce the behavior

–

Expected behavior

No response

Screenshots

No response

Exception traceback

No response

How do you run Weblate?

Docker container

Weblate versions

4.13.1

Weblate deploy checks

No response

Additional context

No response

[dakur]

Now I found this doc page from which it seems that icu-message-format,icu-flags:xml is truly correct.

However, it still doesn't work. Did I misunderstand something?

[dakur]

Ok, there are two problems:

• code blocks in docs are probably broken, because in source file on github, I can see the example (search for icu-message-format, icu-flags:xml:-plural_selectors)
• icu-flags:xml does not work or does something else than I expect. Shouldn't it highlight HTML/XML tags in ICU syntax (like above)?

[nijel]

I think the xml flag has no effect on UI highlighting, it affects the check only. The documentation for check is here: https://docs.weblate.org/en/weblate-4.13.1/user/checks.html#check-icu-message-format

[dakur]

@nijel Thanks for response. But icu-message-format does UI highlighting, doesn't it? How do I recognize which check does and which one doesn't?

I found the docs, but as I mentioned above, the .. code-block::text is not transformed, it's removed, see:

[nijel]

Yes, it does, but there is no highlighting available for ICU+XML in PrismJS we use, thus the XML flag has no effect here. Once the highlighting would be available, it can be easily enabled in Weblate here:

https://github.com/WeblateOrg/weblate/blob/6b1083389871916a6c4cb9e26f1823c9250b5cdb/weblate/trans/models/unit.py#L1414-L1428

The docs should be fixed by 6b1083389871916a6c4cb9e26f1823c9250b5cdb, thanks for spotting.

[github-actions[bot]]

This issue has been added to the backlog. It is not scheduled on the Weblate roadmap, but it eventually might be implemented.

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