Current File : //opt/cpanel/ea-ruby27/root/usr/share/passenger/phusion_passenger/utils/terminal_choice_menu.rb
# encoding: utf-8
# Phusion Passenger - https://www.phusionpassenger.com/
# Copyright (c) 2013-2017 Phusion Holding B.V.
#
# "Passenger", "Phusion Passenger" and "Union Station" are registered
# trademarks of Phusion Holding 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
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