FSE/Global-Styles mods for adminbar.

[aristath]

The adminbar currently has links to create new posts, pages etc, as well as a link to go to the customizer.
With FSE & global styles, some things won't make a lot of sense, while new additions will be necessary to make editing sites easier.

If the currently active theme supports FSE, then I propose the following modifications to the adminbar:

• Customize: The customizer can still be used in some cases but won't be as frequent. I propose we either remove it for FSE themes, or at least move it under the sitename link - which already has a submenu containing dashboard & themes.
• Global Styles: This could take the place of the current "Customize" item.
• Edit Template: When viewing a specific page, we could check if there's a specific template for that page/post. If there is one, we could add a top-level item in the adminbar to allow easier access to it, so users can edit it directly.
• New Template: When viewing a specific page/post, if there is no template for this post, then we could add a new item under the "+New" menu to allow creating one. The benefit of having it there would be that on creation it would automatically add the correct title to allow for templates-hierarchy. User's won't have to think "now what do I need to call this?", it will be "post-25" and that's it.

[noahtallen]

I agree we should make some changes here! (maybe even also to wp-admin sidebar? 👻 )

Global Styles: This could take the place of the current "Customize" item.

I think the goal is for this to be part of the site editor in general (see #24250). maybe this just opens the site editor?

New Template: When viewing a specific page/post, if there is no template for this post, then we could add a new item under the "+New" menu to allow creating one. The benefit of having it there would be that on creation it would automatically add the correct title to allow for templates-hierarchy. User's won't have to think "now what do I need to call this?", it will be "post-25" and that's it.

This is interesting, but I'm not sure it's possible?? Like, in order for WordPress to render the page/post, there must be a template to layout the page. A lot of times this wouldn't be specific to one page, but be general for several pages (like a singular template). Or are you talking more just an "override template" link?

[aristath]

maybe this just opens the site editor?

Yes, that's what I was thinking

there must be a template to layout the page

Yes, I usually start with a catch-all index and go from there.

Or are you talking more just an "override template" link?

Pretty much yes. A link that would allow users to create a new template specifically for that page/post.

[aristath]

Fixed in #27135