Class: Steep::Services::HoverProvider::RBS

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

Constant Summary collapse

TypeAliasContent = 
_ = Struct.new(:location, :decl, keyword_init: true)
ClassContent = 
_ = Struct.new(:location, :decl, keyword_init: true)
InterfaceContent = 
_ = Struct.new(:location, :decl, keyword_init: true)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(service:) ⇒ RBS

Returns a new instance of RBS.



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# File 'lib/steep/services/hover_provider/rbs.rb', line 11

def initialize(service:)
  @service = service
end

Instance Attribute Details

#service ⇒ Object (readonly)

Returns the value of attribute service.



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# File 'lib/steep/services/hover_provider/rbs.rb', line 9

def service
  @service
end

Instance Method Details

#content_for(target:, path:, line:, column:) ⇒ Object 



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# File 'lib/steep/services/hover_provider/rbs.rb', line 19

def content_for(target:, path:, line:, column:)
  service = self.service.signature_services.fetch(target.name)

  env = service.latest_env
  buffer = env.buffers.find {|buf| buf.name.to_s == path.to_s } or return
  (dirs, decls = env.signatures[buffer]) or raise

  locator = ::RBS::Locator.new(buffer: buffer, dirs: dirs, decls: decls)
  loc_key, path = locator.find2(line: line, column: column) || return
  head, *_tail = path

  case head
  when ::RBS::Types::Alias
    content_for_type_name(head.name, env: env, location: head.location || raise)

  when ::RBS::Types::ClassInstance, ::RBS::Types::ClassSingleton
    if loc_key == :name
      location = head.location&.[](:name) or raise
      content_for_type_name(head.name, env: env, location: location)
    end

  when ::RBS::Types::Interface
    location = head.location&.[](:name) or raise
    content_for_type_name(head.name, env: env, location: location)

  when ::RBS::AST::Declarations::ClassAlias, ::RBS::AST::Declarations::ModuleAlias
    if loc_key == :old_name
      location = head.location&.[](:old_name) or raise
      content_for_type_name(head.old_name, env: env, location: location)
    end

  when ::RBS::AST::Directives::Use::SingleClause
    if loc_key == :type_name
      location = head.location&.[](:type_name) or raise
      content_for_type_name(head.type_name.absolute!, env: env, location: location)
    end

  when ::RBS::AST::Directives::Use::WildcardClause
    if loc_key == :namespace
      location = head.location&.[](:namespace) or raise
      content_for_type_name(head.namespace.to_type_name.absolute!, env: env, location: location)
    end
  end
end

#content_for_type_name(type_name, env:, location:) ⇒ Object 



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# File 'lib/steep/services/hover_provider/rbs.rb', line 64

def content_for_type_name(type_name, env:, location:)
  case
  when type_name.alias?
    alias_decl = env.type_alias_decls[type_name]&.decl or return
    TypeAliasContent.new(location: location, decl: alias_decl)
  when type_name.interface?
    interface_decl = env.interface_decls[type_name]&.decl or return
    InterfaceContent.new(location: location, decl: interface_decl)
  when type_name.class?
    class_entry = env.module_class_entry(type_name) or return

    case class_entry
    when ::RBS::Environment::ClassEntry, ::RBS::Environment::ModuleEntry
      class_decl = class_entry.primary.decl
    when ::RBS::Environment::ClassAliasEntry, ::RBS::Environment::ModuleAliasEntry
      class_decl = class_entry.decl
    end

    ClassContent.new(location: location, decl: class_decl)
  end
end

#project ⇒ Object 



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# File 'lib/steep/services/hover_provider/rbs.rb', line 15

def project
  service.project
end