class FastRI::RiService

# File lib/fastri/ri_service.rb, line 112
def initialize(ri_reader)
  @ri_reader = ri_reader
end

# File lib/fastri/ri_service.rb, line 276
def all_classes
  @ri_reader.full_class_names
end

# File lib/fastri/ri_service.rb, line 271
def all_methods
  @ri_reader.full_method_names
end

# File lib/fastri/ri_service.rb, line 237
def args(keyword, options = {})
  options = DEFAULT_INFO_OPTIONS.merge(options)
  return nil if keyword.strip.empty?
  descriptor = NameDescriptor.new(keyword)
  entries = obtain_entries(descriptor, options)
  return nil if entries.empty? || RiIndex::ClassEntry === entries[0]

  params_text = ""
  entries.each do |entry|
    desc = @ri_reader.get_method(entry)
    params_text << capture_stdout(display(options)) do |display|
      display.full_params(desc)
    end
  end
  params_text
rescue RiError
  return nil
end

# File lib/fastri/ri_service.rb, line 258
def class_list(keyword)
  _class_list(keyword, '\1')
end

# File lib/fastri/ri_service.rb, line 265
def class_list_with_flag(keyword)
  r = _class_list(keyword, '\1\2')
  r ? r.map{|x| x.gsub(/\./, "::")} : nil
end

# File lib/fastri/ri_service.rb, line 141
def completion_list(keyw)
  return @ri_reader.full_class_names if keyw == ""

  descriptor = NameDescriptor.new(keyw)

  if descriptor.class_names.empty?
    # try partial matches
    meths = @ri_reader.methods_under_matching("", /(#|\.)#{descriptor.method_name}/, true)
    ret = meths.map{|x| x.name}.uniq.sort
    return ret.empty? ? nil : ret
  end

  # if we're here, some namespace was given
  full_ns_name = descriptor.class_names.join("::")
  if descriptor.method_name == nil && ! [?#, ?:, ?.].include?(keyw[-1])
    # partial match
    namespaces = @ri_reader.namespaces_under_matching("", /^#{full_ns_name}/, false)
    ret = namespaces.map{|x| x.full_name}.uniq.sort
    return ret.empty? ? nil : ret
  else
    if [?#, ?:, ?.].include?(keyw[-1])
      seps = case keyw[-1]
        when ?#; %w[#]
        when ?:; %w[.]
        when ?.; %w[. #]
      end
    else  # both namespace and method
      seps = separators(descriptor.is_class_method)
    end
    sep_re = "(" + seps.map{|x| Regexp.escape(x)}.join("|") + ")"
    # partial
    methods = @ri_reader.methods_under_matching(full_ns_name, /#{sep_re}#{descriptor.method_name}/, false)
    ret = methods.map{|x| x.full_name}.uniq.sort
    return ret.empty? ? nil : ret
  end
rescue RiError
  return nil
end

# File lib/fastri/ri_service.rb, line 197
def info(keyw, options = {})
  options = DEFAULT_INFO_OPTIONS.merge(options)
  return nil if keyw.strip.empty?
  descriptor = NameDescriptor.new(keyw)
  entries = obtain_entries(descriptor, options)

  case entries.size
  when 0; nil
  when 1
    case entries[0].type
    when :namespace
      capture_stdout(display(options)) do |display|
        display.display_class_info(@ri_reader.get_class(entries[0]), @ri_reader)
        if options[:extended]
          methods = @ri_reader.methods_under(entries[0], true)
          methods.each do |meth_entry|
            display.display_method_info(@ri_reader.get_method(meth_entry))
          end
        end
      end
    when :method
      capture_stdout(display(options)) do |display|
        display.display_method_info(@ri_reader.get_method(entries[0]))
      end
    end
  else
    capture_stdout(display(options)) do |display|
      formatter = display.formatter
      formatter.draw_line("Multiple choices:")
      formatter.blankline
      formatter.wrap(entries.map{|x| x.full_name}.join(", "))
      entries.each do |entry|
        display.display_method_info(@ri_reader.get_method(entry)) if entry.type == :method
      end if options[:expand_choices]
    end
  end
rescue RiError
  return nil
end

# File lib/fastri/ri_service.rb, line 187
def matches(keyword, options = {})
  options = DEFAULT_INFO_OPTIONS.merge(options)
  return nil if keyword.strip.empty?
  descriptor = NameDescriptor.new(keyword)
  ret = obtain_entries(descriptor, options).map{|x| x.full_name}
  ret ? ret : nil
rescue RiError
  return nil
end

# File lib/fastri/ri_service.rb, line 122
def obtain_entries(descriptor, options = {})
  options = DEFAULT_OBTAIN_ENTRIES_OPTIONS.merge(options)
  if descriptor.class_names.empty?
    seps = separators(descriptor.is_class_method)
    return obtain_unqualified_method_entries(descriptor.method_name, seps,
                                             options[:lookup_order])
  end

  # if we're here, some namespace was given
  full_ns_name = descriptor.class_names.join("::")
  if descriptor.method_name == nil
    return obtain_namespace_entries(full_ns_name, options[:lookup_order])
  else  # both namespace and method
    seps = separators(descriptor.is_class_method)
    return obtain_qualified_method_entries(full_ns_name, descriptor.method_name, 
                                           seps, options[:lookup_order])
  end
end