This PR restores the controlled nature of focus. Focus allows keyboard
shortcuts and other interactions to occur. The editor's focus should
always / entirely be controlled via the autoFocus prop or by manually
setting `editor.instanceState.isFocused`.
Design note: I'm starting to think that focus is the wrong abstraction,
and that we should instead use a kind of "disabled" state for editors
that the user isn't interacting with directly. In a page where multiple
editors exit (e.g. a notion page), a developer could switch from
disabled to enabled using a first interaction.
### Change Type
- [x] `patch` — Bug fix
### Test Plan
- [x] End to end tests
This PR removes the automatic focus events from the editor.
The `autoFocus` prop is now true by default. When true, the editor will
begin in a focused state (`editor.instanceState.isFocused` will be
`true`) and the component will respond to keyboard shortcuts and other
interactions. When false, the editor will begin in an unfocused state
and not respond to keyboard interactions.
**It's now up to the developer** using the component to update
`isFocused` themselves. There's no predictable way to do that on our
side, so we leave it to the developer to decide when to turn on or off
focus for a container (for example, using an intersection observer to
"unfocus" components that are off screen).
### Change Type
- [x] `major` — Breaking change
### Test Plan
1. Open the multiple editors example.
2. Click to focus each editor.
3. Use the keyboard shortcuts to check that the correct editor is
focused.
4. Start editing a shape, then select the other editor. The first
editing shape should complete.
- [x] Unit Tests
- [x] End to end tests
### Release Notes
- [editor] Make autofocus default, remove automatic blur / focus events.
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Co-authored-by: David Sheldrick <d.j.sheldrick@gmail.com>
This PR is another grab bag:
- renames `readOnly` to `readonly` throughout editor
- fixes a regression related to focus and keyboard shortcuts
- adds a small outline for focused editors
### Change Type
- [x] `major`
### Test Plan
- [x] End to end tests
