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# encoding: utf-8 # Phusion Passenger - https://www.phusionpassenger.com/ # Copyright (c) 2013-2025 Asynchronous B.V. # # "Passenger", "Phusion Passenger" and "Union Station" are registered # trademarks of Asynchronous B.V. # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. module PhusionPassenger module Utils class TerminalChoiceMenu class Choice attr_reader :name attr_accessor :checked alias checked? checked def self.create(choice) if choice.is_a?(Choice) return choice else return Choice.new(choice) end end def initialize(name, checked = false) @name = name @checked = checked end def toggle! @checked = !@checked end end def initialize(choices, mode = :multiple_choice) @choices = choices.map { \|choice\| Choice.create(choice) } @mode = mode @pointer = 0 @index = index_choices end def display_choices display(render_to_string) end def query if STDIN.tty? done = false begin raw_no_echo_mode hide_cursor while !done display_choices done = process_input clear_screen if !done end if @mode == :single_choice [@pointer, @choices[@pointer].name] else nil end ensure restore_mode show_cursor puts end else display_choices puts nil end end def [](name) return @index[name] end def selected_choices @choices.find_all{ \|c\| c.checked? }.map{ \|c\| c.name } end private JRUBY = defined?(RUBY_ENGINE) && RUBY_ENGINE == 'jruby' def index_choices index = {} @choices.each do \|choice\| index[choice.name] = choice end return index end def process_input case getchar(STDIN) when "\x1b" process_cursor_move false when " " if @mode == :multiple_choice process_toggle end false when "!" process_disable_utf8 false when "\r" true else false end end def process_cursor_move if getchar(STDIN) == "[" case getchar(STDIN) when "A" # up @pointer = [@pointer - 1, 0].max when "B" # down @pointer = [@pointer + 1, @choices.size - 1].min end end end def process_toggle @choices[@pointer].toggle! end def process_disable_utf8 ENV['UTF8_MENUS'] = '0' end def render_to_string str = "" @choices.each_with_index do \|choice, i\| pointer = render_pointer(i) checkbox = render_checkbox(choice.checked) str << " #{pointer} #{checkbox} #{choice.name}\r\n" end str.chomp! str end def render_pointer(index) @pointer == index ? maybe_utf8("‣", ">") : " " end def render_checkbox(checked) if @mode == :multiple_choice if checked maybe_utf8("⬢", "(*)") else maybe_utf8("⬡", "( )") end else nil end end def display(str) STDOUT.write(str) STDOUT.flush end def clear_screen number_of_lines = render_to_string.split("\n").size display("\r") (number_of_lines - 1).times do display(move_up) end end def maybe_utf8(utf8, plain) if ENV['UTF8_MENUS'] == '0' return plain else return utf8 end end def hide_cursor display("\x1b[?25l") end def show_cursor display("\x1b[?25h") end def move_up return "\x1b[0A" end def getchar(io) char = io.getc char = char.chr if char.is_a?(Integer) return char end if JRUBY require 'java' require 'readline' java_import 'jline.console.ConsoleReader' def raw_no_echo_mode input = STDIN.to_inputstream output = STDOUT.to_outputstream @console = ConsoleReader.new(input, output) @console.set_history_enabled(false) @console.set_bell_enabled(true) @console.set_pagination_enabled(false) @terminal_state = @console.getEchoCharacter @console.setEchoCharacter(0) end def restore_mode @console.setEchoCharacter(@terminal_state) @console.get_terminal.restore end else def raw_no_echo_mode @terminal_state = `stty -g` system("stty raw -echo -icanon isig") end def restore_mode system("stty #{@terminal_state}") end end end end # module Utils end # module PhusionPassenger