Class: Steep::Services::CompletionProvider::RBS

Inherits:
Object
  • Object
show all
Defined in:
lib/steep/services/completion_provider/rbs.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, signature) ⇒ RBS

Returns a new instance of RBS.



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# File 'lib/steep/services/completion_provider/rbs.rb', line 7

def initialize(path, signature)
  @path = path
  @signature = signature
end

Instance Attribute Details

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/steep/services/completion_provider/rbs.rb', line 5

def path
  @path
end

#project ⇒ Object (readonly)

Returns the value of attribute project.



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# File 'lib/steep/services/completion_provider/rbs.rb', line 5

def project
  @project
end

#signature ⇒ Object (readonly)

Returns the value of attribute signature.



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# File 'lib/steep/services/completion_provider/rbs.rb', line 5

def signature
  @signature
end

Instance Method Details

#run(line, column) ⇒ Object 



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# File 'lib/steep/services/completion_provider/rbs.rb', line 12

def run(line, column)
  context = nil #: RBS::Resolver::context

  case signature.status
  when Services::SignatureService::SyntaxErrorStatus, Services::SignatureService::AncestorErrorStatus
    if source = signature.latest_env.each_rbs_source.find { _1.buffer.name == path }
      dirs = source.directives
    else
      dirs = [] #: Array[RBS::AST::Directives::t]
    end
  else
    file = signature.files.fetch(path)
    file.is_a?(Services::SignatureService::RBSFileStatus) or raise
    source = file.source
    source.is_a?(::RBS::Source::RBS) or raise
    buffer = source.buffer
    dirs = source.directives
    decls = source.declarations

    locator = ::RBS::Locator.new(buffer: buffer, dirs: dirs, decls: decls)

    _hd, tail = locator.find2(line: line, column: column)
    tail ||= [] #: Array[RBS::Locator::component]

    tail.reverse_each do |t|
      case t
      when ::RBS::AST::Declarations::Module, ::RBS::AST::Declarations::Class
        if (last_type_name = context&.[](1)).is_a?(::RBS::TypeName)
          context = [context, last_type_name + t.name]
        else
          context = [context, t.name.absolute!]
        end
      end
    end
  end

  content =
    case file = signature.files.fetch(path)
    when ::RBS::Source::Ruby
      file.buffer.content
    when Services::SignatureService::RBSFileStatus
      file.content
    end
  buffer = ::RBS::Buffer.new(name: path, content: content)
  prefix = Services::CompletionProvider::TypeName::Prefix.parse(buffer, line: line, column: column)

  completion = Services::CompletionProvider::TypeName.new(env: signature.latest_env, context: context, dirs: dirs)
  type_names = completion.find_type_names(prefix)
  prefix_size = prefix ? prefix.size : 0

  [
    prefix_size,
    type_names.filter_map do |type_name|
      if (absolute_name, relative_name = completion.resolve_name_in_context(type_name))
        [absolute_name, relative_name]
      end
    end
  ]
end