class RubyLsp::Requests::Formatting

registering the ruby-lsp as the Ruby formatter.
request uses RuboCop to fix auto-correctable offenses in the document. This requires enabling format on save and
The [formatting](microsoft.github.io/language-server-protocol/specification#textDocument_formatting)

def initialize(global_state, document)

: (GlobalState global_state, RubyDocument document) -> void 
def initialize(global_state, document)
  super()
  @document = document
  @active_formatter = global_state.active_formatter #: Support::Formatter?
  @uri = document.uri #: URI::Generic
end

def perform

: -> (Array[Interface::TextEdit] & Object)?
@override 
def perform
  return unless @active_formatter
  return if @document.syntax_error?
  # We don't format erb documents yet
  formatted_text = @active_formatter.run_formatting(@uri, @document)
  return unless formatted_text
  lines = @document.source.lines
  size = @document.source.size
  return if formatted_text.size == size && formatted_text == @document.source
  [
    Interface::TextEdit.new(
      range: Interface::Range.new(
        start: Interface::Position.new(line: 0, character: 0),
        end: Interface::Position.new(line: lines.size, character: 0),
      ),
      new_text: formatted_text,
    ),
  ]
end

def provider

: -> TrueClass 
def provider
  true
end