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b443bdbdb9
It is one of the reasons why paste to IRB is slow.
147 lines
3 KiB
Ruby
147 lines
3 KiB
Ruby
class Reline::ANSI
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RAW_KEYSTROKE_CONFIG = {
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[27, 91, 65] => :ed_prev_history, # ↑
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[27, 91, 66] => :ed_next_history, # ↓
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[27, 91, 67] => :ed_next_char, # →
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[27, 91, 68] => :ed_prev_char, # ←
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[27, 91, 51, 126] => :key_delete, # Del
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[27, 91, 49, 126] => :ed_move_to_beg, # Home
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[27, 91, 52, 126] => :ed_move_to_end, # End
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}.each_key(&:freeze).freeze
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@@input = STDIN
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def self.input=(val)
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@@input = val
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end
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@@output = STDOUT
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def self.output=(val)
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@@output = val
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end
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@@buf = []
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def self.getc
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unless @@buf.empty?
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return @@buf.shift
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end
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c = nil
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loop do
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result = select([@@input], [], [], 0.001)
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next if result.nil?
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c = @@input.read(1)
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break
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end
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c&.ord
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end
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def self.ungetc(c)
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@@buf.unshift(c)
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end
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def self.retrieve_keybuffer
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result = select([@@input], [], [], 0.001)
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return if result.nil?
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str = @@input.read_nonblock(1024)
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str.bytes.each do |c|
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@@buf.push(c)
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end
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end
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def self.get_screen_size
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@@input.winsize
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rescue Errno::ENOTTY
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[24, 80]
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end
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def self.set_screen_size(rows, columns)
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@@input.winsize = [rows, columns]
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self
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rescue Errno::ENOTTY
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self
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end
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def self.cursor_pos
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begin
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res = ''
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@@input.raw do |stdin|
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@@output << "\e[6n"
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@@output.flush
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while (c = stdin.getc) != 'R'
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res << c if c
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end
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end
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m = res.match(/(?<row>\d+);(?<column>\d+)/)
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column = m[:column].to_i - 1
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row = m[:row].to_i - 1
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rescue Errno::ENOTTY
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buf = @@output.pread(@@output.pos, 0)
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row = buf.count("\n")
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column = buf.rindex("\n") ? (buf.size - buf.rindex("\n")) - 1 : 0
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end
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Reline::CursorPos.new(column, row)
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end
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def self.move_cursor_column(x)
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print "\e[#{x + 1}G"
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end
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def self.move_cursor_up(x)
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if x > 0
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print "\e[#{x}A" if x > 0
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elsif x < 0
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move_cursor_down(-x)
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end
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end
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def self.move_cursor_down(x)
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if x > 0
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print "\e[#{x}B" if x > 0
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elsif x < 0
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move_cursor_up(-x)
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end
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end
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def self.erase_after_cursor
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print "\e[K"
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end
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def self.scroll_down(x)
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return if x.zero?
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print "\e[#{x}S"
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end
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def self.clear_screen
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print "\e[2J"
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print "\e[1;1H"
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end
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@@old_winch_handler = nil
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def self.set_winch_handler(&handler)
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@@old_winch_handler = Signal.trap('WINCH', &handler)
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end
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def self.prep
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retrieve_keybuffer
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int_handle = Signal.trap('INT', 'IGNORE')
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otio = `stty -g`.chomp
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setting = ' -echo -icrnl cbreak'
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stty = `stty -a`
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if /-parenb\b/ =~ stty
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setting << ' pass8'
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end
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if /\bdsusp *=/ =~ stty
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setting << ' dsusp undef'
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end
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setting << ' -ixoff'
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`stty #{setting}`
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Signal.trap('INT', int_handle)
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otio
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end
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def self.deprep(otio)
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int_handle = Signal.trap('INT', 'IGNORE')
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`stty #{otio}`
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Signal.trap('INT', int_handle)
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Signal.trap('WINCH', @@old_winch_handler) if @@old_winch_handler
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end
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end
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