# File lib/ruby_lsp/requests/completion.rb, line 54
def initialize(document, global_state, position, typechecker_enabled, dispatcher)
  super()
  @target = T.let(nil, T.nilable(Prism::Node))
  @dispatcher = dispatcher
  # Completion always receives the position immediately after the character that was just typed. Here we adjust it
  # back by 1, so that we find the right node
  char_position = document.create_scanner.find_char_position(position) - 1
  matched, parent, nesting = document.locate(
    document.tree,
    char_position,
    node_types: [Prism::CallNode, Prism::ConstantReadNode, Prism::ConstantPathNode],
  )
  @response_builder = T.let(
    ResponseBuilders::CollectionResponseBuilder[Interface::CompletionItem].new,
    ResponseBuilders::CollectionResponseBuilder[Interface::CompletionItem],
  )

  Listeners::Completion.new(
    @response_builder,
    global_state,
    nesting,
    typechecker_enabled,
    dispatcher,
    document.uri,
  )

  Addon.addons.each do |addon|
    addon.create_completion_listener(@response_builder, nesting, dispatcher, document.uri)
  end

  return unless matched && parent

  @target = case matched
  when Prism::CallNode
    matched
  when Prism::ConstantReadNode, Prism::ConstantPathNode
    if parent.is_a?(Prism::ConstantPathNode) && matched.is_a?(Prism::ConstantReadNode)
      parent
    else
      matched
    end
  end
end

# File lib/ruby_lsp/requests/completion.rb, line 34
def provider
  Interface::CompletionOptions.new(
    resolve_provider: true,
    trigger_characters: ["/", "\"", "'"],
    completion_item: {
      labelDetailsSupport: true,
    },
  )
end

# File lib/ruby_lsp/requests/completion.rb, line 99
def perform
  return [] unless @target

  @dispatcher.dispatch_once(@target)
  @response_builder.response
end