feat(developer): Checks when adding layer name on "Code" panel

[dyacob]

Is your feature request related to a problem? Please describe.

In Keyman Developer, in the Touch layout interface, the Add layer feature does not permit non-Roman letters in the layer name, when letters of other scripts are used the following error message appears (see also the attached screenshot):

Layer name must contain only alphanumerics, underscore, and hyphen.

However, the user can add a temporary name, switch to the "Code" panel, and replace the temporary name with the desired non-Roman name without issue.

Developer

Describe the solution you'd like

The JSON spec does not have the alphanumeric limitation for attribute values. I would like the feature to check validity against a JSON API, and report an error to the user as applicable.

Describe alternatives you've considered

No response

Related issues

No response

Keyman apps

• [ ] Keyman for Android
• [ ] Keyman for iPhone and iPad
• [ ] Keyman for Linux
• [ ] Keyman for macOS
• [ ] Keyman for Windows
• [X] Keyman Developer
• [ ] KeymanWeb
• [ ] Other - give details at bottom of form

Keyman version

15.0.273

Operating system

Windows 11

Device

Windows Laptop

Target application

N/A

Browser

N/A

Keyboard name

N/A

Keyboard version

N/A

Language name

N/A

Additional context

No response

[mcdurdin]

Technically, you've discovered a workaround for a restriction that we put in place for some reason, which I cannot currently recall. Layer names are used in places other than the JSON source, such as in the layer() statement in .kmn files, which would preclude some characters.

I think it is likely that we made the allowable character set overly restrictive. Will consider relaxing that where we can for a future update.