class Reline::Config

# File lib/reline/config.rb, line 50
def initialize
  @additional_key_bindings = {} # from inputrc
  @additional_key_bindings[:emacs] = {}
  @additional_key_bindings[:vi_insert] = {}
  @additional_key_bindings[:vi_command] = {}
  @oneshot_key_bindings = {}
  @editing_mode_label = :emacs
  @keymap_label = :emacs
  @keymap_prefix = []
  @key_actors = {}
  @key_actors[:emacs] = Reline::KeyActor::Emacs.new
  @key_actors[:vi_insert] = Reline::KeyActor::ViInsert.new
  @key_actors[:vi_command] = Reline::KeyActor::ViCommand.new
  @vi_cmd_mode_string = '(cmd)'
  @vi_ins_mode_string = '(ins)'
  @emacs_mode_string = '@'
  # https://tiswww.case.edu/php/chet/readline/readline.html#IDX25
  @history_size = -1 # unlimited
  @keyseq_timeout = 500
  @test_mode = false
  @autocompletion = false
  @convert_meta = true if seven_bit_encoding?(Reline::IOGate.encoding)
  @loaded = false
end

# File lib/reline/config.rb, line 176
def add_default_key_binding(keystroke, target)
  @key_actors[@keymap_label].default_key_bindings[keystroke] = target
end

# File lib/reline/config.rb, line 172
def add_default_key_binding_by_keymap(keymap, keystroke, target)
  @key_actors[keymap].default_key_bindings[keystroke] = target
end

# File lib/reline/config.rb, line 164
def add_oneshot_key_binding(keystroke, target)
  @oneshot_key_bindings[keystroke] = target
end

# File lib/reline/config.rb, line 348
def bind_key(key, func_name)
  if key =~ /\A"(.*)"\z/
    keyseq = parse_keyseq($1)
  else
    keyseq = nil
  end
  if func_name =~ /"(.*)"/
    func = parse_keyseq($1)
  else
    func = func_name.tr(?-, ?_).to_sym # It must be macro.
  end
  [keyseq, func]
end

# File lib/reline/config.rb, line 265
def bind_variable(name, value)
  case name
  when 'history-size'
    begin
      @history_size = Integer(value)
    rescue ArgumentError
      @history_size = 500
    end
  when 'bell-style'
    @bell_style =
      case value
      when 'none', 'off'
        :none
      when 'audible', 'on'
        :audible
      when 'visible'
        :visible
      else
        :audible
      end
  when 'comment-begin'
    @comment_begin = value.dup
  when 'completion-query-items'
    @completion_query_items = value.to_i
  when 'isearch-terminators'
    @isearch_terminators = retrieve_string(value)
  when 'editing-mode'
    case value
    when 'emacs'
      @editing_mode_label = :emacs
      @keymap_label = :emacs
      @keymap_prefix = []
    when 'vi'
      @editing_mode_label = :vi_insert
      @keymap_label = :vi_insert
      @keymap_prefix = []
    end
  when 'keymap'
    case value
    when 'emacs', 'emacs-standard'
      @keymap_label = :emacs
      @keymap_prefix = []
    when 'emacs-ctlx'
      @keymap_label = :emacs
      @keymap_prefix = [?\C-x.ord]
    when 'emacs-meta'
      @keymap_label = :emacs
      @keymap_prefix = [?\e.ord]
    when 'vi', 'vi-move', 'vi-command'
      @keymap_label = :vi_command
      @keymap_prefix = []
    when 'vi-insert'
      @keymap_label = :vi_insert
      @keymap_prefix = []
    end
  when 'keyseq-timeout'
    @keyseq_timeout = value.to_i
  when 'show-mode-in-prompt'
    case value
    when 'off'
      @show_mode_in_prompt = false
    when 'on'
      @show_mode_in_prompt = true
    else
      @show_mode_in_prompt = false
    end
  when 'vi-cmd-mode-string'
    @vi_cmd_mode_string = retrieve_string(value)
  when 'vi-ins-mode-string'
    @vi_ins_mode_string = retrieve_string(value)
  when 'emacs-mode-string'
    @emacs_mode_string = retrieve_string(value)
  when *VARIABLE_NAMES then
    variable_name = :"@#{name.tr(?-, ?_)}"
    instance_variable_set(variable_name, value.nil? || value == '1' || value == 'on')
  end
end

# File lib/reline/config.rb, line 86
def editing_mode
  @key_actors[@editing_mode_label]
end

# File lib/reline/config.rb, line 90
def editing_mode=(val)
  @editing_mode_label = val
end

# File lib/reline/config.rb, line 94
def editing_mode_is?(*val)
  val.any?(@editing_mode_label)
end

# File lib/reline/config.rb, line 230
def handle_directive(directive, file, no, if_stack)
  directive, args = directive.split(' ')
  case directive
  when 'if'
    condition = false
    case args
    when /^mode=(vi|emacs)$/i
      mode = $1.downcase
      # NOTE: mode=vi means vi-insert mode
      mode = 'vi_insert' if mode == 'vi'
      if @editing_mode_label == mode.to_sym
        condition = true
      end
    when 'term'
    when 'version'
    else # application name
      condition = true if args == 'Ruby'
      condition = true if args == 'Reline'
    end
    if_stack << [no, !condition]
  when 'else'
    if if_stack.empty?
      raise InvalidInputrc, "#{file}:#{no}: unmatched else"
    end
    if_stack.last[1] = !if_stack.last[1]
  when 'endif'
    if if_stack.empty?
      raise InvalidInputrc, "#{file}:#{no}: unmatched endif"
    end
    if_stack.pop
  when 'include'
    read(File.expand_path(args))
  end
end

# File lib/reline/config.rb, line 106
def inputrc_path
  case ENV['INPUTRC']
  when nil, ''
  else
    return File.expand_path(ENV['INPUTRC'])
  end

  # In the XDG Specification, if ~/.config/readline/inputrc exists, then
  # ~/.inputrc should not be read, but for compatibility with GNU Readline,
  # if ~/.inputrc exists, then it is given priority.
  home_rc_path = File.expand_path('~/.inputrc')
  return home_rc_path if File.exist?(home_rc_path)

  case path = ENV['XDG_CONFIG_HOME']
  when nil, ''
  else
    path = File.join(path, 'readline/inputrc')
    return path if File.exist?(path) and path == File.expand_path(path)
  end

  path = File.expand_path('~/.config/readline/inputrc')
  return path if File.exist?(path)

  return home_rc_path
end

# File lib/reline/config.rb, line 156
def key_bindings
  # The key bindings for each editing mode will be overwritten by the user-defined ones.
  kb = @key_actors[@editing_mode_label].default_key_bindings.dup
  kb.merge!(@additional_key_bindings[@editing_mode_label])
  kb.merge!(@oneshot_key_bindings)
  kb
end

# File lib/reline/config.rb, line 362
def key_notation_to_code(notation)
  case notation
  when /\\(?:C|Control)-([A-Za-z_])/
    (1 + $1.downcase.ord - ?a.ord)
  when /\\(?:M|Meta)-([0-9A-Za-z_])/
    modified_key = $1
    case $1
    when /[0-9]/
      ?\M-0.bytes.first + (modified_key.ord - ?0.ord)
    when /[A-Z]/
      ?\M-A.bytes.first + (modified_key.ord - ?A.ord)
    when /[a-z]/
      ?\M-a.bytes.first + (modified_key.ord - ?a.ord)
    end
  when /\\(?:C|Control)-(?:M|Meta)-[A-Za-z_]/, /\\(?:M|Meta)-(?:C|Control)-[A-Za-z_]/
  # 129 M-^A
  when /\\(\d{1,3})/ then $1.to_i(8) # octal
  when /\\x(\h{1,2})/ then $1.to_i(16) # hexadecimal
  when "\\e" then ?\e.ord
  when "\\\\" then ?\\.ord
  when "\\\"" then ?".ord
  when "\\'" then ?'.ord
  when "\\a" then ?\a.ord
  when "\\b" then ?\b.ord
  when "\\d" then ?\d.ord
  when "\\f" then ?\f.ord
  when "\\n" then ?\n.ord
  when "\\r" then ?\r.ord
  when "\\t" then ?\t.ord
  when "\\v" then ?\v.ord
  else notation.ord
  end
end

# File lib/reline/config.rb, line 98
def keymap
  @key_actors[@keymap_label]
end

# File lib/reline/config.rb, line 102
def loaded?
  @loaded
end

# File lib/reline/config.rb, line 396
def parse_keyseq(str)
  ret = []
  str.scan(KEYSEQ_PATTERN) do
    ret << key_notation_to_code($&)
  end
  ret
end

# File lib/reline/config.rb, line 136
def read(file = nil)
  file ||= default_inputrc_path
  begin
    if file.respond_to?(:readlines)
      lines = file.readlines
    else
      lines = File.readlines(file)
    end
  rescue Errno::ENOENT
    return nil
  end

  read_lines(lines, file)
  @loaded = true
  self
rescue InvalidInputrc => e
  warn e.message
  nil
end

# File lib/reline/config.rb, line 186
def read_lines(lines, file = nil)
  if not lines.empty? and lines.first.encoding != Reline.encoding_system_needs
    begin
      lines = lines.map do |l|
        l.encode(Reline.encoding_system_needs)
      rescue Encoding::UndefinedConversionError
        mes = "The inputrc encoded in #{lines.first.encoding.name} can't be converted to the locale #{Reline.encoding_system_needs.name}."
        raise Reline::ConfigEncodingConversionError.new(mes)
      end
    end
  end
  if_stack = []

  lines.each_with_index do |line, no|
    next if line.match(/\A\s*#/)

    no += 1

    line = line.chomp.lstrip
    if line.start_with?('$')
      handle_directive(line[1..-1], file, no, if_stack)
      next
    end

    next if if_stack.any? { |_no, skip| skip }

    case line
    when /^set +([^ ]+) +([^ ]+)/i
      var, value = $1.downcase, $2
      bind_variable(var, value)
      next
    when /\s*("#{KEYSEQ_PATTERN}+")\s*:\s*(.*)\s*$/o
      key, func_name = $1, $2
      func_name = func_name.split.first
      keystroke, func = bind_key(key, func_name)
      next unless keystroke
      @additional_key_bindings[@keymap_label][@keymap_prefix + keystroke] = func
    end
  end
  unless if_stack.empty?
    raise InvalidInputrc, "#{file}:#{if_stack.last[0]}: unclosed if"
  end
end

# File lib/reline/config.rb, line 75
def reset
  if editing_mode_is?(:vi_command)
    @editing_mode_label = :vi_insert
  end
  @additional_key_bindings.keys.each do |key|
    @additional_key_bindings[key].clear
  end
  @oneshot_key_bindings.clear
  reset_default_key_bindings
end

# File lib/reline/config.rb, line 180
def reset_default_key_bindings
  @key_actors.values.each do |ka|
    ka.reset_default_key_bindings
  end
end

# File lib/reline/config.rb, line 168
def reset_oneshot_key_bindings
  @oneshot_key_bindings.clear
end

# File lib/reline/config.rb, line 343
def retrieve_string(str)
  str = $1 if str =~ /\A"(.*)"\z/
  parse_keyseq(str).map { |c| c.chr(Reline.encoding_system_needs) }.join
end

# File lib/reline/config.rb, line 132
        def default_inputrc_path
  @default_inputrc_path ||= inputrc_path
end

# File lib/reline/config.rb, line 404
        def seven_bit_encoding?(encoding)
  encoding == Encoding::US_ASCII
end