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ruby-2.7.8
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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{ 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-icon vi-ins-mode-icon emacs-mode-string } VARIABLE_NAME_SYMBOLS = VARIABLE_NAMES.map { |v| :"#{v.tr(?-, ?_)}" } VARIABLE_NAME_SYMBOLS.each do |v| attr_accessor v end 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_icon = '(cmd)' @vi_ins_mode_icon = '(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 def reset if editing_mode_is?(:vi_command) @editing_mode_label = :vi_insert end @additional_key_bindings = {} @default_key_bindings = {} 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.respond_to?(:any?) ? val : [val]).any?(@editing_mode_label) end def keymap @key_actors[@keymap_label] 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 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 def key_bindings # override @default_key_bindings with @additional_key_bindings @default_key_bindings.merge(@additional_key_bindings) end def add_default_key_binding(keystroke, target) @default_key_bindings[keystroke] = target end def reset_default_key_bindings @default_key_bindings = {} end 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 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 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 = instance_eval(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_icon = retrieve_string(value) when 'vi-ins-mode-string' @vi_ins_mode_icon = 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) if str =~ /\A"(.*)"\z/ parse_keyseq($1).map(&:chr).join else parse_keyseq(str).map(&:chr).join end 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 end