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reline
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config.rb
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class Reline::Config attr_reader :test_mode 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}|./ class InvalidInputrc < RuntimeError attr_accessor :file, :lineno end VARIABLE_NAMES = %w{ completion-ignore-case convert-meta disable-completion history-size keyseq-timeout show-all-if-ambiguous 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(?-, ?_)}" } VARIABLE_NAME_SYMBOLS.each do |v| attr_accessor v end attr_accessor :autocompletion 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 @enable_bracketed_paste = true end def reset if editing_mode_is?(:vi_command) @editing_mode_label = :vi_insert end @oneshot_key_bindings.clear end def editing_mode @key_actors[@editing_mode_label] end def editing_mode=(val) @editing_mode_label = val end def editing_mode_is?(*val) val.any?(@editing_mode_label) end def keymap @key_actors[@keymap_label] end def loaded? @loaded end 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 private def default_inputrc_path @default_inputrc_path ||= inputrc_path end def read(file = nil) @loaded = true 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) self rescue InvalidInputrc => e warn e.message nil end 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 def add_oneshot_key_binding(keystroke, target) @oneshot_key_bindings[keystroke] = target end def reset_oneshot_key_bindings @oneshot_key_bindings.clear end def add_default_key_binding_by_keymap(keymap, keystroke, target) @key_actors[keymap].default_key_bindings[keystroke] = target end def add_default_key_binding(keystroke, target) @key_actors[@keymap_label].default_key_bindings[keystroke] = target end 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, $2 func_name = func_name.split.first keystroke, func = bind_key(key, func_name) next unless keystroke @additional_key_bindings[@keymap_label][@keymap_prefix + keystroke] = func end end unless if_stack.empty? raise InvalidInputrc, "#{file}:#{if_stack.last[0]}: unclosed if" end end def handle_directive(directive, file, no, if_stack) directive, args = directive.split(' ') case directive when 'if' condition = false case args when /^mode=(vi|emacs)$/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 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 def retrieve_string(str) str = $1 if str =~ /\A"(.*)"\z/ parse_keyseq(str).map { |c| c.chr(Reline.encoding_system_needs) }.join end 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 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 $1.to_i(16) # hexadecimal when "\\e" then ?\e.ord when "\\\\" then ?\\.ord when "\\\"" then ?".ord when "\\'" then ?'.ord when "\\a" then ?\a.ord when "\\b" then ?\b.ord when "\\d" then ?\d.ord when "\\f" then ?\f.ord when "\\n" then ?\n.ord when "\\r" then ?\r.ord when "\\t" then ?\t.ord when "\\v" then ?\v.ord else notation.ord end end def parse_keyseq(str) ret = [] str.scan(KEYSEQ_PATTERN) do ret << key_notation_to_code($&) end ret end private def seven_bit_encoding?(encoding) encoding == Encoding::US_ASCII end end