Class: Reline::Config

Inherits:
Object
  • Object
show all
Defined in:
lib/reline/config.rb

Defined Under Namespace

Classes: InvalidInputrc

Constant Summary collapse

KEYSEQ_PATTERN = 
/\\(?:C|Control)-[A-Za-z_]|\\(?:M|Meta)-[0-9A-Za-z_]|\\(?:C|Control)-(?:M|Meta)-[A-Za-z_]|\\(?:M|Meta)-(?:C|Control)-[A-Za-z_]|\\e|\\[\\\"\'abdfnrtv]|\\\d{1,3}|\\x\h{1,2}|./
VARIABLE_NAMES = 
%w{
  bind-tty-special-chars
  blink-matching-paren
  byte-oriented
  completion-ignore-case
  convert-meta
  disable-completion
  enable-keypad
  expand-tilde
  history-preserve-point
  history-size
  horizontal-scroll-mode
  input-meta
  keyseq-timeout
  mark-directories
  mark-modified-lines
  mark-symlinked-directories
  match-hidden-files
  meta-flag
  output-meta
  page-completions
  prefer-visible-bell
  print-completions-horizontally
  show-all-if-ambiguous
  show-all-if-unmodified
  visible-stats
  show-mode-in-prompt
  vi-cmd-mode-string
  vi-ins-mode-string
  emacs-mode-string
  enable-bracketed-paste
  isearch-terminators
}
VARIABLE_NAME_SYMBOLS = 
VARIABLE_NAMES.map { |v| :"#{v.tr(?-, ?_)}" }

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Config

Returns a new instance of Config.



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# File 'lib/reline/config.rb', line 48

def initialize
  @additional_key_bindings = {} # from inputrc
  @default_key_bindings = {} # environment-dependent
  @skip_section = nil
  @if_stack = nil
  @editing_mode_label = :emacs
  @keymap_label = :emacs
  @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
end

Instance Attribute Details

#test_mode ⇒ Object (readonly)

Returns the value of attribute test_mode.



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# File 'lib/reline/config.rb', line 2

def test_mode
  @test_mode
end

Instance Method Details

#add_default_key_binding(keystroke, target) ⇒ Object 



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# File 'lib/reline/config.rb', line 142

def add_default_key_binding(keystroke, target)
  @default_key_bindings[keystroke] = target
end

#bind_key(key, func_name) ⇒ Object 



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# File 'lib/reline/config.rb', line 292

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

#bind_variable(name, value) ⇒ Object 



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# File 'lib/reline/config.rb', line 217

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
    when 'vi'
      @editing_mode_label = :vi_insert
      @keymap_label = :vi_insert
    end
  when 'keymap'
    case value
    when 'emacs', 'emacs-standard', 'emacs-meta', 'emacs-ctlx'
      @keymap_label = :emacs
    when 'vi', 'vi-move', 'vi-command'
      @keymap_label = :vi_command
    when 'vi-insert'
      @keymap_label = :vi_insert
    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

#editing_mode ⇒ Object 



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# File 'lib/reline/config.rb', line 76

def editing_mode
  @key_actors[@editing_mode_label]
end

#editing_mode=(val) ⇒ Object 



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# File 'lib/reline/config.rb', line 80

def editing_mode=(val)
  @editing_mode_label = val
end

#editing_mode_is?(*val) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/reline/config.rb', line 84

def editing_mode_is?(*val)
  (val.respond_to?(:any?) ? val : [val]).any?(@editing_mode_label)
end

#handle_directive(directive, file, no) ⇒ Object 



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# File 'lib/reline/config.rb', line 187

def handle_directive(directive, file, no)
  directive, args = directive.split(' ')
  case directive
  when 'if'
    condition = false
    case args
    when 'mode'
    when 'term'
    when 'version'
    else # application name
      condition = true if args == 'Ruby'
      condition = true if args == 'Reline'
    end
    @if_stack << [file, no, @skip_section]
    @skip_section = !condition
  when 'else'
    if @if_stack.empty?
      raise InvalidInputrc, "#{file}:#{no}: unmatched else"
    end
    @skip_section = !@skip_section
  when 'endif'
    if @if_stack.empty?
      raise InvalidInputrc, "#{file}:#{no}: unmatched endif"
    end
    @skip_section = @if_stack.pop
  when 'include'
    read(args)
  end
end

#inputrc_path ⇒ Object 



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# File 'lib/reline/config.rb', line 92

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

#key_bindings ⇒ Object 



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# File 'lib/reline/config.rb', line 137

def key_bindings
  # override @default_key_bindings with @additional_key_bindings
  @default_key_bindings.merge(@additional_key_bindings)
end

#key_notation_to_code(notation) ⇒ Object 



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# File 'lib/reline/config.rb', line 306

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

#keymap ⇒ Object 



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# File 'lib/reline/config.rb', line 88

def keymap
  @key_actors[@keymap_label]
end

#parse_keyseq(str) ⇒ Object 



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# File 'lib/reline/config.rb', line 340

def parse_keyseq(str)
  ret = []
  str.scan(KEYSEQ_PATTERN) do
    ret << key_notation_to_code($&)
  end
  ret
end

#read(file = nil) ⇒ Object 



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# File 'lib/reline/config.rb', line 118

def read(file = nil)
  file ||= 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)
  self
rescue InvalidInputrc => e
  warn e.message
  nil
end

#read_lines(lines, file = nil) ⇒ Object 



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# File 'lib/reline/config.rb', line 150

def read_lines(lines, file = nil)
  conditions = [@skip_section, @if_stack]
  @skip_section = nil
  @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)
      next
    end

    next if @skip_section

    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
      keystroke, func = bind_key(key, func_name)
      next unless keystroke
      @additional_key_bindings[keystroke] = func
    end
  end
  unless @if_stack.empty?
    raise InvalidInputrc, "#{file}:#{@if_stack.last[1]}: unclosed if"
  end
ensure
  @skip_section, @if_stack = conditions
end

#reset ⇒ Object 



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# File 'lib/reline/config.rb', line 68

def reset
  if editing_mode_is?(:vi_command)
    @editing_mode_label = :vi_insert
  end
  @additional_key_bindings = {}
  @default_key_bindings = {}
end

#reset_default_key_bindings ⇒ Object 



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# File 'lib/reline/config.rb', line 146

def reset_default_key_bindings
  @default_key_bindings = {}
end

#retrieve_string(str) ⇒ Object 



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# File 'lib/reline/config.rb', line 284

def retrieve_string(str)
  if str =~ /\A"(.*)"\z/
    parse_keyseq($1).map(&:chr).join
  else
    parse_keyseq(str).map(&:chr).join
  end
end