Plugin patterns appear under "Theme patterns" heading

[jameskoster]

In the Site Editor Pattern library, patterns added by plugins appear under the "Theme patterns" heading which is inaccurate:

[jameskoster]

Possible solutions:

1. Update "Theme patterns" to "Theme & plugin patterns".
2. Add a separate "Plugin patterns" group.

[bgardner]

Hard vote for #2.

[jeffikus]

@jameskoster I've been thinking about this for templates as well. I think clarity is the most important thing, so I would want to know where a pattern is coming from/sourced. My vote would be for #2 as well.

[richtabor]

Could probably just be “Theme” and “Plugin” headings, as “Patterns” is already declared above.

[glendaviesnz]

In relation to option 2 I had a quick look and I am not sure how we would reliably identify plugin patterns as separate to theme patterns as it seems like both just use register_block_pattern. This currently doesn't provide any source information other than the voluntary use of a hopefully meaningful slug.

We could potentially try and filter out theme patterns by matching the first part of the slug against the theme name, but that seems a little unreliable. I may be missing some other way of identifying that a pattern came from a plugin as apposed to a theme though.

[vcanales]

An optional source property was added recently.

• source (optional): A string that denotes the source of the pattern. For a plugin registering a pattern, pass the string 'plugin'. For a theme, pass the string 'theme'.

It doesn't seem to be used within the Gutenberg codebase as of yet, but I'd imagine we can:

1. Add source = theme to all patterns registered by a theme, ie. because they are in a theme's patterns/ directory.
2. Using the source property when available to separate patterns in categories (eg. "Theme patterns", "Plugin patterns", "Other patterns").

[glendaviesnz]

1. Add source = theme to all patterns registered by a theme, ie. because they are in a theme's patterns/ directory.

I was overlooking the fact that theme patterns are actually registered from the patterns/ dir with _register_theme_block_patterns() , so modifying that method to add the source seems like a good option @vcanales

[jameskoster]

@vcanales @glendaviesnz thank you for looking into this. Do you think it's possible this gets done in time for 6.3?

If not we may need to go with option 1, or another equally simple idea. Perhaps we could remove the "Theme patterns" heading entirely, and move template parts beneath them:

[carolinan]

There are many older patterns in themes that were registered before the patterns folder was an option.

[carolinan]

Perhaps we could remove the "Theme patterns" heading entirely, and move template parts beneath them:

Yeah, that would work I think? Now that "My patterns" always show.