Enhance XML Autocomplete for Magento 2 Configuration Files

[DmitryFurs]

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

This request proposes improvements to the XML autocomplete functionality for various Magento 2 configuration files. Enhancing these autocompletions can significantly speed up development and improve the overall experience for developers working with Magento 2 projects.

Describe the solution you'd like

di.xml

• xsi:type attribute: Autocomplete for common Magento value types:
  • array
  • object
  • string
  • boolean
  • null
  • etc.

db_schema.xml

• column xsi:type attribute: Autocomplete for valid column data types:
  • int
  • text
  • varchar
  • decimal
  • date
  • timestamp
  • etc.

Layout XML & UI Components (e.g., layout/*.xml, ui_component/*.xml)

• <argument xsi:type="...">: Enhance suggestions for valid xsi:type values (same list as in di.xml, plus any layout/UI-specific ones).

csp_whitelist.xml

• id attribute: Autocomplete known CSP directives:
  • script-src
  • style-src
  • img-src
  • frame-src
  • etc.

acl.xml

• resource id attribute: Autocomplete existing ACL resources:
  • Magento_Backend::admin
  • Magento_Backend::stores
  • Magento_Catalog::catalog
  • etc.

routes.xml

• Autocomplete known frontNames and valid route IDs:
  • admin
  • standard

Additional context

Benefit to Developers:

• Reduces manual lookup of valid attribute values and resource IDs.
• Decreases the chance of typos and related errors.
• Aligns with Magento’s established XML structure and best practices.

Additional potential for autocomplete can be found in other, less commonly used configuration files referenced in the documentation: https://experienceleague.adobe.com/en/docs/commerce-operations/configuration-guide/files/module-files#configuration-types-objects-and-interfaces