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require 'ncurses'
module CLI
def self.keytable(key)
case key
when 12
'<redraw>'
when ?\n
'<cr>'
when ?\b, Ncurses::KEY_BACKSPACE, 127
'<bs>'
when Ncurses::KEY_RIGHT
'<right>'
when Ncurses::KEY_LEFT
'<left>'
when Ncurses::KEY_UP
'<up>'
when Ncurses::KEY_DOWN
'<down>'
when ?\e
'<esc>'
when Ncurses::KEY_BTAB
'<s-tab>'
when 9
'<tab>'
when 1..26 # CTRL + ...
"<c-#{(key+96).chr}>"
when 32..127
key.chr
else
''
end
end
def self.included(this)
@@window = Ncurses.initscr
starti
end
# (Re)Start the Interface
def starti
@@running = true
@@screen = Ncurses.stdscr
@@screen.keypad(true)
Ncurses.start_color
Ncurses.use_default_colors
Ncurses.noecho
Ncurses.curs_set 0
Ncurses.halfdelay(200)
@@colortable = []
end
def self.refresh
Ncurses.refresh
end
# Close the Interface
def closei
@@running = false
Ncurses.echo
Ncurses.nocbreak
Ncurses.curs_set 1
Ncurses.endwin
end
def running?() @@running end
def cleari
Ncurses.mvaddstr(0, 0, ' ' * (lines * cols))
end
def geti
CLI.keytable(Ncurses.getch)
end
def set_title(x)
print "\e]2;#{x}\007"
end
def lines
Ncurses.LINES
end
def cols
Ncurses.COLS
end
def movi(y=0, x=0)
y < 0 and y += lines
Ncurses.move(y, x)
end
def puti *args
case args.size
when 1
Ncurses.addstr(args[0].to_s)
when 2
if (y = args[0]) < 0 then y += Ncurses.LINES end
Ncurses.mvaddstr(y, 0, args[1].to_s)
when 3
if (y = args[0]) < 0 then y += Ncurses.LINES end
Ncurses.mvaddstr(y, args[1], args[2].to_s)
end
end
def attr_set(fg=-1, bg=-1, attr = nil)
fg, bg, attr = fg if fg.is_a? Array
if attr
Ncurses.attrset(attr | Ncurses.COLOR_PAIR(get_color(fg, bg)))
else
Ncurses.color_set(get_color(fg, bg), nil)
end
end
def attr_at(y=0, x=0, len=-1, fg=-1, bg=-1, attr=0)
fg, bg, attr = fg if fg.is_a? Array
y += lines if y < 0
x += cols if x < 0
attr ||= 0
Ncurses.mvchgat(y, x, len, attr, get_color(fg, bg), nil)
end
def get_color(fg, bg)
n = bg+2 + 9*(fg+2)
color = @@colortable[n]
unless color
# create a new pair
size = @@colortable.reject{|x| x.nil? }.size + 1
Ncurses::init_pair(size, fg, bg)
color = @@colortable[n] = size
end
return color
end
end
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