Class RDoc::RI::Driver < Object

# File ../ruby/lib/rdoc/ri/driver.rb, line 76
def self.default_options
  options = {}
  options[:use_stdout] = !$stdout.tty?
  options[:width] = 72
  options[:interactive] = false
  options[:use_cache] = true
  options[:profile] = false

  # By default all standard paths are used.
  options[:use_system] = true
  options[:use_site] = true
  options[:use_home] = true
  options[:use_gems] = true
  options[:extra_doc_dirs] = []

  return options
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 97
def self.dump data_path
  require 'pp'

  open data_path, 'rb' do |io|
    pp Marshal.load(io.read)
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 330
def initialize initial_options = {}
  @paging = false
  @classes = nil

  options = self.class.default_options.update(initial_options)

  @formatter_klass = options[:formatter]

  require 'profile' if options[:profile]

  @names = options[:names]
  @list = options[:list]

  @doc_dirs = []
  @stores   = []

  RDoc::RI::Paths.each(options[:use_system], options[:use_site],
                       options[:use_home], options[:use_gems],
                       *options[:extra_doc_dirs]) do |path, type|
    @doc_dirs << path

    store = RDoc::RI::Store.new path, type
    store.load_cache
    @stores << store
  end

  @list_doc_dirs = options[:list_doc_dirs]

  @interactive = options[:interactive]
  @use_stdout  = options[:use_stdout]
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 108
  def self.process_args argv
    options = default_options

    opts = OptionParser.new do |opt|
      opt.accept File do |file,|
        File.readable?(file) and not File.directory?(file) and file
      end

      opt.program_name = File.basename $0
      opt.version = RDoc::VERSION
      opt.release = nil
      opt.summary_indent = ' ' * 4

      opt.banner = <<-EOT
Usage: #{opt.program_name} [options] [names...]

Where name can be:

  Class | Class::method | Class#method | Class.method | method

All class names may be abbreviated to their minimum unambiguous form. If a name
is ambiguous, all valid options will be listed.

A '.' matches either class or instance methods, while #method
matches only instance and ::method matches only class methods.

For example:

    #{opt.program_name} Fil
    #{opt.program_name} File
    #{opt.program_name} File.new
    #{opt.program_name} zip

Note that shell quoting or escaping may be required for method names containing
punctuation:

    #{opt.program_name} 'Array.[]'
    #{opt.program_name} compact\\!

To see the default directories ri will search, run:

    #{opt.program_name} --list-doc-dirs

Specifying the --system, --site, --home, --gems or --doc-dir options will
limit ri to searching only the specified directories.

Options may also be set in the 'RI' environment variable.
      EOT

      opt.separator nil
      opt.separator "Options:"

      opt.separator nil

      formatters = RDoc::Markup.constants.grep(/^To[A-Z][a-z]+$/).sort
      formatters = formatters.sort.map do |formatter|
        formatter.to_s.sub('To', '').downcase
      end

      opt.on("--format=NAME", "-f",
             "Uses the selected formatter. The default",
             "formatter is bs for paged output and ansi",
             "otherwise. Valid formatters are:",
             formatters.join(' '), formatters) do |value|
        options[:formatter] = RDoc::Markup.const_get "To#{value.capitalize}"
      end

      opt.separator nil

      opt.on("--no-pager", "-T",
             "Send output directly to stdout,",
             "rather than to a pager.") do
        options[:use_stdout] = true
      end

      opt.separator nil

      opt.on("--width=WIDTH", "-w", OptionParser::DecimalInteger,
             "Set the width of the output.") do |value|
        options[:width] = value
      end

      opt.separator nil

      opt.on("--interactive", "-i",
             "In interactive mode you can repeatedly",
             "look up methods with autocomplete.") do
        options[:interactive] = true
      end

      opt.separator nil

      opt.on("--list", "-l",
             "List classes ri knows about.") do
        options[:list] = true
      end

      opt.separator nil

      opt.on("--[no-]profile",
             "Run with the ruby profiler") do |value|
        options[:profile] = value
      end

      opt.separator nil
      opt.separator "Data source options:"
      opt.separator nil

      opt.on("--list-doc-dirs",
             "List the directories from which ri will",
             "source documentation on stdout and exit.") do
        options[:list_doc_dirs] = true
      end

      opt.separator nil

      opt.on("--doc-dir=DIRNAME", "-d", Array,
             "List of directories from which to source",
             "documentation in addition to the standard",
             "directories.  May be repeated.") do |value|
        value.each do |dir|
          unless File.directory? dir then
            raise OptionParser::InvalidArgument, "#{dir} is not a directory"
          end

          options[:extra_doc_dirs] << File.expand_path(dir)
        end
      end

      opt.separator nil

      opt.on("--no-standard-docs",
             "Do not include documentation from",
             "the Ruby standard library, site_lib,",
             "installed gems, or ~/.rdoc.",
             "Use with --doc-dir") do
        options[:use_system] = false
        options[:use_site] = false
        options[:use_gems] = false
        options[:use_home] = false
      end

      opt.separator nil

      opt.on("--[no-]system",
             "Include documentation from Ruby's standard",
             "library.  Defaults to true.") do |value|
        options[:use_system] = value
      end

      opt.separator nil

      opt.on("--[no-]site",
             "Include documentation from libraries",
             "installed in site_lib.",
             "Defaults to true.") do |value|
        options[:use_site] = value
      end

      opt.separator nil

      opt.on("--[no-]gems",
             "Include documentation from RubyGems.",
             "Defaults to true.") do |value|
        options[:use_gems] = value
      end

      opt.separator nil

      opt.on("--[no-]home",
             "Include documentation stored in ~/.rdoc.",
             "Defaults to true.") do |value|
        options[:use_home] = value
      end

      opt.separator nil
      opt.separator "Debug options:"
      opt.separator nil

      opt.on("--dump=CACHE", File,
             "Dumps data from an ri cache or data file") do |value|
        options[:dump_path] = value
      end
    end

    argv = ENV['RI'].to_s.split.concat argv

    opts.parse! argv

    options[:names] = argv

    options[:use_stdout] ||= !$stdout.tty?
    options[:use_stdout] ||= options[:interactive]
    options[:width] ||= 72

    options

  rescue OptionParser::InvalidArgument, OptionParser::InvalidOption => e
    puts opts
    puts
    puts e
    exit 1
  end

# File ../ruby/lib/rdoc/ri/driver.rb, line 315
def self.run argv = ARGV
  options = process_args argv

  if options[:dump_path] then
    dump options[:dump_path]
    return
  end

  ri = new options
  ri.run
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 365
def add_also_in out, also_in
  return if also_in.empty?

  out << RDoc::Markup::Rule.new(1)
  out << RDoc::Markup::Paragraph.new("Also found in:")

  paths = RDoc::Markup::Verbatim.new
  also_in.each do |store|
    paths.parts.push store.friendly_path, "\n"
  end
  out << paths
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 382
def add_class out, name, classes
  heading = if classes.all? { |klass| klass.module? } then
              name
            else
              superclass = classes.map do |klass|
                klass.superclass unless klass.module?
              end.compact.shift || 'Object'

              superclass = superclass.full_name unless String === superclass

              "#{name} < #{superclass}"
            end

  out << RDoc::Markup::Heading.new(1, heading)
  out << RDoc::Markup::BlankLine.new
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 402
def add_from out, store
  out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 409
def add_includes out, includes
  return if includes.empty?

  out << RDoc::Markup::Rule.new(1)
  out << RDoc::Markup::Heading.new(1, "Includes:")

  includes.each do |modules, store|
    if modules.length == 1 then
      include = modules.first
      name = include.name
      path = store.friendly_path
      out << RDoc::Markup::Paragraph.new("#{name} (from #{path})")

      if include.comment then
        out << RDoc::Markup::BlankLine.new
        out << include.comment
      end
    else
      out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")

      wout, with = modules.partition { |incl| incl.comment.empty? }

      out << RDoc::Markup::BlankLine.new unless with.empty?

      with.each do |incl|
        out << RDoc::Markup::Paragraph.new(incl.name)
        out << RDoc::Markup::BlankLine.new
        out << incl.comment
      end

      unless wout.empty? then
        verb = RDoc::Markup::Verbatim.new

        wout.each do |incl|
          verb.push incl.name, "\n"
        end

        out << verb
      end
    end
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 455
def add_method_list out, methods, name
  return if methods.empty?

  out << RDoc::Markup::Heading.new(1, "#{name}:")
  out << RDoc::Markup::BlankLine.new

  if @use_stdout and !@interactive
    out.push(*methods.map do |method|
      RDoc::Markup::Verbatim.new method
    end)
  else
    out << RDoc::Markup::IndentedParagraph.new(2, methods.join(', '))
  end

  out << RDoc::Markup::BlankLine.new
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 475
def ancestors_of klass
  ancestors = []

  unexamined = [klass]
  seen = []

  loop do
    break if unexamined.empty?
    current = unexamined.shift
    seen << current

    stores = classes[current]

    break unless stores and not stores.empty?

    klasses = stores.map do |store|
      store.ancestors[current]
    end.flatten.uniq

    klasses = klasses - seen

    ancestors.push(*klasses)
    unexamined.push(*klasses)
  end

  ancestors.reverse
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 512
def class_document name, found, klasses, includes
  also_in = []

  out = RDoc::Markup::Document.new

  add_class out, name, klasses

  add_includes out, includes

  found.each do |store, klass|
    comment = klass.comment
    # TODO the store's cache should always return an empty Array
    class_methods    = store.class_methods[klass.full_name]    || []
    instance_methods = store.instance_methods[klass.full_name] || []
    attributes       = store.attributes[klass.full_name]       || []

    if comment.empty? and
       instance_methods.empty? and class_methods.empty? then
      also_in << store
      next
    end

    add_from out, store

    unless comment.empty? then
      out << RDoc::Markup::Rule.new(1)

      if comment.merged? then
        parts = comment.parts
        parts = parts.zip [RDoc::Markup::BlankLine.new] * parts.length
        parts.flatten!
        parts.pop

        out.push(*parts)
      else
        out << comment
      end
    end

    if class_methods or instance_methods or not klass.constants.empty? then
      out << RDoc::Markup::Rule.new(1)
    end

    unless klass.constants.empty? then
      out << RDoc::Markup::Heading.new(1, "Constants:")
      out << RDoc::Markup::BlankLine.new
      list = RDoc::Markup::List.new :NOTE

      constants = klass.constants.sort_by { |constant| constant.name }

      list.push(*constants.map do |constant|
        parts = constant.comment.parts if constant.comment
        parts << RDoc::Markup::Paragraph.new('[not documented]') if
          parts.empty?

        RDoc::Markup::ListItem.new(constant.name, *parts)
      end)

      out << list
      out << RDoc::Markup::BlankLine.new
    end

    add_method_list out, class_methods,    'Class methods'
    add_method_list out, instance_methods, 'Instance methods'
    add_method_list out, attributes,       'Attributes'
  end

  add_also_in out, also_in

  out
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 587
def classes
  return @classes if @classes

  @classes = {}

  @stores.each do |store|
    store.cache[:modules].each do |mod|
      # using default block causes searched-for modules to be added
      @classes[mod] ||= []
      @classes[mod] << store
    end
  end

  @classes
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 607
def classes_and_includes_for name
  klasses = []
  includes = []

  found = @stores.map do |store|
    begin
      klass = store.load_class name
      klasses  << klass
      includes << [klass.includes, store] if klass.includes
      [store, klass]
    rescue Errno::ENOENT
    end
  end.compact

  includes.reject! do |modules,| modules.empty? end

  [found, klasses, includes]
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 629
def complete name
  klasses = classes.keys
  completions = []

  klass, selector, method = parse_name name

  # may need to include Foo when given Foo::
  klass_name = method ? name : klass

  if name !~ /#|\./ then
    completions = klasses.grep(/^#{Regexp.escape klass_name}[^:]*$/)
    completions.concat klasses.grep(/^#{Regexp.escape name}[^:]*$/) if
      name =~ /::$/

    completions << klass if classes.key? klass # to complete a method name
  elsif selector then
    completions << klass if classes.key? klass
  elsif classes.key? klass_name then
    completions << klass_name
  end

  if completions.include? klass and name =~ /#|\.|::/ then
    methods = list_methods_matching name

    if not methods.empty? then
      # remove Foo if given Foo:: and a method was found
      completions.delete klass
    elsif selector then
      # replace Foo with Foo:: as given
      completions.delete klass
      completions << "#{klass}#{selector}"
    end

    completions.push(*methods)
  end

  completions.sort.uniq
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 671
def display document
  page do |io|
    text = document.accept formatter(io)

    io.write text
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 682
def display_class name
  return if name =~ /#|\./

  found, klasses, includes = classes_and_includes_for name

  return if found.empty?

  out = class_document name, found, klasses, includes

  display out
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 697
def display_method name
  found = load_methods_matching name

  raise NotFoundError, name if found.empty?

  filtered = filter_methods found, name

  out = method_document name, filtered

  display out
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 715
def display_name name
  return true if display_class name

  display_method name if name =~ /::|#|\./

  true
rescue NotFoundError
  matches = list_methods_matching name if name =~ /::|#|\./
  matches = classes.keys.grep(/^#{name}/) if matches.empty?

  raise if matches.empty?

  page do |io|
    io.puts "#{name} not found, maybe you meant:"
    io.puts
    io.puts matches.join("\n")
  end

  false
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 739
def display_names names
  names.each do |name|
    name = expand_name name

    display_name name
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 751
def expand_class klass
  klass.split('::').inject '' do |expanded, klass_part|
    expanded << '::' unless expanded.empty?
    short = expanded << klass_part

    subset = classes.keys.select do |klass_name|
      klass_name =~ /^#{expanded}[^:]*$/
    end

    abbrevs = Abbrev.abbrev subset

    expanded = abbrevs[short]

    raise NotFoundError, short unless expanded

    expanded.dup
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 774
def expand_name name
  klass, selector, method = parse_name name

  return [selector, method].join if klass.empty?

  "#{expand_class klass}#{selector}#{method}"
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 785
def filter_methods found, name
  regexp = name_regexp name

  filtered = found.find_all do |store, methods|
    methods.any? { |method| method.full_name =~ regexp }
  end

  return filtered unless filtered.empty?

  found
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 803
def find_methods name
  klass, selector, method = parse_name name

  types = method_type selector

  klasses = nil
  ambiguous = klass.empty?

  if ambiguous then
    klasses = classes.keys
  else
    klasses = ancestors_of klass
    klasses.unshift klass
  end

  methods = []

  klasses.each do |ancestor|
    ancestors = classes[ancestor]

    next unless ancestors

    klass = ancestor if ambiguous

    ancestors.each do |store|
      methods << [store, klass, ancestor, types, method]
    end
  end

  methods = methods.sort_by do |_, k, a, _, m|
    [k, a, m].compact
  end

  methods.each do |item|
    yield(*item) # :yields: store, klass, ancestor, types, method
  end

  self
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 847
def formatter(io)
  if @formatter_klass then
    @formatter_klass.new
  elsif paging? or !io.tty? then
    RDoc::Markup::ToBs.new
  else
    RDoc::Markup::ToAnsi.new
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 896
def in_path? file
  return true if file =~ %r\A/% and File.exist? file

  ENV['PATH'].split(File::PATH_SEPARATOR).any? do |path|
    File.exist? File.join(path, file)
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 860
def interactive
  puts "\nEnter the method name you want to look up."

  if defined? Readline then
    Readline.completion_proc = method :complete
    puts "You can use tab to autocomplete."
  end

  puts "Enter a blank line to exit.\n\n"

  loop do
    name = if defined? Readline then
             Readline.readline ">> "
           else
             print ">> "
             $stdin.gets
           end

    return if name.nil? or name.empty?

    name = expand_name name.strip

    begin
      display_name name
    rescue NotFoundError => e
      puts e.message
    end
  end

rescue Interrupt
  exit
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 908
def list_known_classes names = []
  classes = []

  stores.each do |store|
    classes << store.modules
  end

  classes = classes.flatten.uniq.sort

  unless names.empty? then
    filter = Regexp.union names.map { |name| /^#{name}/ }

    classes = classes.grep filter
  end

  page do |io|
    if paging? or io.tty? then
      if names.empty? then
        io.puts "Classes and Modules known to ri:"
      else
        io.puts "Classes and Modules starting with #{names.join ', '}:"
      end
      io.puts
    end

    io.puts classes.join("\n")
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 940
def list_methods_matching name
  found = []

  find_methods name do |store, klass, ancestor, types, method|
    if types == :instance or types == :both then
      methods = store.instance_methods[ancestor]

      if methods then
        matches = methods.grep(/^#{Regexp.escape method.to_s}/)

        matches = matches.map do |match|
          "#{klass}##{match}"
        end

        found.push(*matches)
      end
    end

    if types == :class or types == :both then
      methods = store.class_methods[ancestor]

      next unless methods
      matches = methods.grep(/^#{Regexp.escape method.to_s}/)

      matches = matches.map do |match|
        "#{klass}::#{match}"
      end

      found.push(*matches)
    end
  end

  found.uniq
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 979
def load_method store, cache, klass, type, name
  methods = store.send(cache)[klass]

  return unless methods

  method = methods.find do |method_name|
    method_name == name
  end

  return unless method

  store.load_method klass, "#{type}#{method}"
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 996
def load_methods_matching name
  found = []

  find_methods name do |store, klass, ancestor, types, method|
    methods = []

    methods << load_method(store, :class_methods, ancestor, '::',  method) if
      [:class, :both].include? types

    methods << load_method(store, :instance_methods, ancestor, '#',  method) if
      [:instance, :both].include? types

    found << [store, methods.compact]
  end

  found.reject do |path, methods| methods.empty? end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1017
def method_document name, filtered
  out = RDoc::Markup::Document.new

  out << RDoc::Markup::Heading.new(1, name)
  out << RDoc::Markup::BlankLine.new

  filtered.each do |store, methods|
    methods.each do |method|
      out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")

      unless name =~ /^#{Regexp.escape method.parent_name}/ then
        out << RDoc::Markup::Heading.new(3, "Implementation from #{method.parent_name}")
      end
      out << RDoc::Markup::Rule.new(1)

      if method.arglists then
        arglists = method.arglists.chomp.split "\n"
        arglists = arglists.map { |line| line + "\n" }
        out << RDoc::Markup::Verbatim.new(*arglists)
        out << RDoc::Markup::Rule.new(1)
      end

      out << RDoc::Markup::BlankLine.new
      out << method.comment
      out << RDoc::Markup::BlankLine.new
    end
  end

  out
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1051
def method_type selector
  case selector
  when '.', nil then :both
  when '#'      then :instance
  else               :class
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1063
def name_regexp name
  klass, type, name = parse_name name

  case type
  when '#', '::' then
    /^#{klass}#{type}#{Regexp.escape name}$/
  else
    /^#{klass}(#|::)#{Regexp.escape name}$/
  end
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1077
def page
  if pager = setup_pager then
    begin
      yield pager
    ensure
      pager.close
    end
  else
    yield $stdout
  end
rescue Errno::EPIPE
ensure
  @paging = false
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1095
def paging?
  @paging
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1106
def parse_name name
  parts = name.split(/(::|#|\.)/)

  if parts.length == 1 then
    if parts.first =~ /^[a-z]|^([%&*+\/<>^`|~-]|\+@|-@|<<|<=>?|===?|=>|=~|>>|\[\]=?|~@)$/ then
      type = '.'
      meth = parts.pop
    else
      type = nil
      meth = nil
    end
  elsif parts.length == 2 or parts.last =~ /::|#|\./ then
    type = parts.pop
    meth = nil
  elsif parts[-2] != '::' or parts.last !~ /^[A-Z]/ then
    meth = parts.pop
    type = parts.pop
  end

  klass = parts.join

  [klass, type, meth]
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1133
def run
  if @list_doc_dirs then
    puts @doc_dirs
  elsif @list then
    list_known_classes @names
  elsif @interactive or @names.empty? then
    interactive
  else
    display_names @names
  end
rescue NotFoundError => e
  abort e.message
end

# File ../ruby/lib/rdoc/ri/driver.rb, line 1151
def setup_pager
  return if @use_stdout

  pagers = [ENV['RI_PAGER'], ENV['PAGER'], 'pager', 'less', 'more']

  pagers.compact.uniq.each do |pager|
    next unless pager

    pager_cmd = pager.split.first

    next unless in_path? pager_cmd

    io = IO.popen(pager, 'w') rescue next

    next if $? and $?.exited? # pager didn't work

    @paging = true

    return io
  end

  @use_stdout = true

  nil
end