ckeditor5-1.0.x-dev/config/schema/ckeditor5.schema.yml

# Schema for the configuration files of the CKEditor5 module.

editor.settings.ckeditor5:
  type: mapping
  label: 'CKEditor 5 settings'
  mapping:
    toolbar:
      type: mapping
      label: 'Toolbar configuration'
      mapping:
        items:
          type: sequence
          label: 'Items'
          sequence:
            type: ckeditor5.toolbar_item
            label: 'Button'
    plugins:
      type: sequence
      label: 'Plugins'
      sequence:
        type: ckeditor5.plugin.[%key]
  constraints:
    # Each enabled CKEditor 5 plugin that implements \Drupal\ckeditor5\Plugin\CKEditor5PluginConfigurableInterface
    # must exist in here.
    CKEditor5EnabledConfigurablePlugins: []

# Plugin \Drupal\ckeditor5\Plugin\CKEditor5Plugin\Language
ckeditor5.plugin.language:
  type: mapping
  label: 'Language'
  mapping:
    language_list:
      type: string
      label: 'Language list ID'
      constraints:
        # Configuring this does not make sense without the corresponding button.
        CKEditor5ToolbarItemDependencyConstraint:
          toolbarItem: textPartLanguage
        # Only two possible values are accepted.
        Choice:
          - un
          - all

# Plugin \Drupal\ckeditor5\Plugin\CKEditor5Plugin\Heading
ckeditor5.plugin.ckeditor5heading:
  type: mapping
  label: Headings
  mapping:
    enabled_headings:
      type: sequence
      label: 'Enabled Headings'
      constraints:
        NotBlank:
          message: "Enable at least one heading, otherwise disable the Heading plugin."
      sequence:
        type: string
        label: 'Heading type'
        constraints:
          Choice:
            callback: \Drupal\ckeditor5\Plugin\CKEditor5Plugin\Heading::validChoices