class Reline::ANSI RAW_KEYSTROKE_CONFIG = { [27, 91, 65] => :ed_prev_history, # ↑ [27, 91, 66] => :ed_next_history, # ↓ [27, 91, 67] => :ed_next_char, # → [27, 91, 68] => :ed_prev_char, # ← [27, 91, 51, 126] => :key_delete, # Del [27, 91, 49, 126] => :ed_move_to_beg, # Home [27, 91, 52, 126] => :ed_move_to_end, # End }.each_key(&:freeze).freeze @@input = STDIN def self.input=(val) @@input = val end @@output = STDOUT def self.output=(val) @@output = val end @@buf = [] def self.getc unless @@buf.empty? return @@buf.shift end @@input.getbyte end def self.ungetc(c) @@buf.unshift(c) end def self.retrieve_keybuffer result = select([@@input], [], [], 0.001) return if result.nil? str = @@input.read_nonblock(1024) str.bytes.each do |c| @@buf.push(c) end end def self.get_screen_size @@input.winsize rescue Errno::ENOTTY [24, 80] end def self.set_screen_size(rows, columns) @@input.winsize = [rows, columns] self rescue Errno::ENOTTY self end def self.cursor_pos begin res = '' @@input.raw do |stdin| @@output << "\e[6n" @@output.flush while (c = stdin.getc) != 'R' res << c if c end end m = res.match(/(?\d+);(?\d+)/) column = m[:column].to_i - 1 row = m[:row].to_i - 1 rescue Errno::ENOTTY buf = @@output.pread(@@output.pos, 0) row = buf.count("\n") column = buf.rindex("\n") ? (buf.size - buf.rindex("\n")) - 1 : 0 end Reline::CursorPos.new(column, row) 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 @@old_winch_handler = nil def self.set_winch_handler(&handler) @@old_winch_handler = Signal.trap('WINCH', &handler) end def self.prep retrieve_keybuffer int_handle = Signal.trap('INT', 'IGNORE') otio = `stty -g`.chomp setting = ' -echo -icrnl cbreak' stty = `stty -a` if /-parenb\b/ =~ stty setting << ' pass8' end if /\bdsusp *=/ =~ stty setting << ' dsusp undef' end setting << ' -ixoff' `stty #{setting}` Signal.trap('INT', int_handle) otio end def self.deprep(otio) int_handle = Signal.trap('INT', 'IGNORE') `stty #{otio}` Signal.trap('INT', int_handle) Signal.trap('WINCH', @@old_winch_handler) if @@old_winch_handler end end