Add option for fully locking a block

[mtias]

Currently, the locking options are all about selectively restricting some block interactions. "Content only" introduced a little while back started dealing with the editing of blocks. We are lacking an option to fully lock down a block so that no edits are possible.

[richtabor]

"Content only" introduced a little while back started dealing with the editing of blocks.

We also don't have a UI for content only.

[annezazu]

Related on the theme author front: #36008

[bradhogan]

+1

[fabiankaegy]

Isn't this solved by useBlockEditingMode('disabled') ? The disabled mode removes the block from the list view and makes it completely inert?

[bradhogan]

@fabiankaegy This isn't about disabling the option to use a block it's about adding a block with content and disabling the option for that content to be changed.

[fabiankaegy]

@bradhogan Yeah, I get that. I think that exactly is possible with this.

A block can programmatically get its editing mode set to disabled at which point you can no longer interact with the block. It sill exists and it still outputs everything that was set in it. But it cannot be changed anymore until it gets unlocked 🤔

[bradhogan]

@fabiankaegy Ok got it. So you're saying this could potentially be implemented in core (or Gutenberg) relatively easily since the option is essentially already there. 🤞