[4.x] Add localizable toggle to edit field stack

[robdekort]

This adds the localizable toggle to the edit field stack. Currently it's only available on the fieldset builder overview as a globe icon. Often users can't find out how to set localizable to true. This should help.

[sjclark]

My hero 🥂
I'm an "often user"

[duncanmcclean]

Right now, this config field is showing on all fields, even if you're working on a single-site install or in managing fields in a Grid.

We should probably only be showing this option when the canDefineLocalizable prop is set to true (which is what we use to determine if the localizable icon shows or not).

[robdekort]

Ahh yeah, great catch. Don't think I can do that from the PHP array can I?

[robdekort]

Btw, something to consider. I wouldn't mind always having the globe and this toggle available. I've had quite a few projects where I know it's gonna be multisite some day, but not yet. In those cases I would still like to prepare fields by setting them to localizable or not.

[duncanmcclean]

Ahh yeah, great catch. Don't think I can do that from the PHP array can I?

Nope, it'll need to be done in Vue.

[robdekort]

An if based on the handle? I could look into later.

[aerni]

You can use the Sites::hasMultiple() of the Sites Facade to determine if the localizable toggle should be added or not. That's effectively the same thing as the method in Vue.

cms/src/Sites/Sites.php

Lines 36 to 39 in 897803d

	public function hasMultiple()
	{
	return $this->sites->count() > 1;
	}

[duncanmcclean]

Unfortunately, that won't work for nested fields (like Grids and Replicators), where the canDefineLocalizable is set to false.

cms/resources/js/components/fieldtypes/grid/FieldsFieldtype.vue

Line 6 in 897803d

:can-define-localizable="false"

Ideally, we'd be using the same logic for this new field.

From a quick look at the code, it looks like showing the field based on that prop might be a little involved.

[robdekort]

I don't have a clue how to do this. Closing this one. If someone else wants to take a stab at it: be my guest :-).