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module Reline
def getc
c = nil
until c
return nil if @line_editor.finished?
result = select([$stdin], [], [], 0.1)
next if result.nil?
c = $stdin.read(1)
end
c.ord
end
def self.get_screen_size
$stdin.winsize
end
def self.set_screen_size(rows, columns)
$stdin.winsize = [rows, columns]
self
end
def self.cursor_pos
res = ''
$stdin.raw do |stdin|
$stdout << "\e[6n"
$stdout.flush
while (c = stdin.getc) != 'R'
res << c if c
end
end
m = res.match(/(?<row>\d+);(?<column>\d+)/)
CursorPos.new(m[:column].to_i - 1, m[:row].to_i - 1)
end
def self.move_cursor_column(x)
print "\e[#{x + 1}G"
end
def self.move_cursor_up(x)
if x > 0
print "\e[#{x}A" if x > 0
elsif x < 0
move_cursor_down(-x)
end
end
def self.move_cursor_down(x)
if x > 0
print "\e[#{x}B" if x > 0
elsif x < 0
move_cursor_up(-x)
end
end
def self.erase_after_cursor
print "\e[K"
end
def self.scroll_down(x)
return if x.zero?
print "\e[#{x}S"
end
def self.clear_screen
print "\e[2J"
print "\e[1;1H"
end
def prep
int_handle = Signal.trap('INT', 'IGNORE')
otio = `stty -g`.chomp
setting = ' -echo -icrnl cbreak'
if (`stty -a`.scan(/-parenb\b/).first == '-parenb')
setting << ' pass8'
end
setting << ' -ixoff'
`stty #{setting}`
Signal.trap('INT', int_handle)
otio
end
def deprep(otio)
int_handle = Signal.trap('INT', 'IGNORE')
`stty #{otio}`
Signal.trap('INT', int_handle)
end
end
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