Is there a gem like 'Term::ANSIColor' which works with 256 color terminals? The perl script 256colors2.pl works great in my terminal, and I'd like to use some of these colors in my ruby scripts without manually inserting the ANSI codes.
A:
There is a gem called Term::ANSIColor on Rubyforge... :)
No idea how good it is though.
ba
2009-09-10 06:45:23
That is the one he linked in his question.
sepp2k
2009-09-10 09:05:59
To clarify that mentioned gem provides 8 color ANSI support. I'm looking for the same sort of thing, with more colors.
brianegge
2009-09-10 13:21:25
+5
A:
Here's an adaptation of the 256colors2.pl script to ruby, with some help from this guide. It defines a print_color(text, foreground, background)
method that should be easily applicable to your projects. It prints the string in colour, and then resets the colour to the terminal default. Should be easy enough to skip the reset if you'd prefer that.
def rgb(red, green, blue)
16 + (red * 36) + (green * 6) + blue
end
def gray(g)
232 + g
end
def set_color(fg, bg)
print "\x1b[38;5;#{fg}m" if fg
print "\x1b[48;5;#{bg}m" if bg
end
def reset_color
print "\x1b[0m"
end
def print_color(txt, fg, bg)
set_color(fg, bg)
print txt
reset_color
end
# convenience method
def rgb_cube
for green in 0..5 do
for red in 0..5 do
for blue in 0..5 do
yield [red, green, blue]
end
print " "
end
puts
end
end
# rgb list on black bg
rgb_cube do |red, green, blue|
print_color("%d%d%d " % [red, green, blue], rgb(red, green, blue), nil)
end
puts
# rgb list on white bg
rgb_cube do |red, green, blue|
print_color("%d%d%d " % [red, green, blue], rgb(red, green, blue), 15)
end
puts
# system palette:
print "System colors:\n";
(0..7).each do |color|
print_color(" ", nil, color)
end
puts
(8..15).each do |color|
print_color(" ", nil, color)
end
puts
puts
# color cube
print "Color cube, 6x6x6:\n"
rgb_cube do |red, green, blue|
print_color(" ", nil, rgb(red, green, blue))
end
puts
# grayscale ramp
print "Grayscale ramp:\n"
for g in (0..23) do
print_color(" ", nil, gray(g))
end
puts
puts
Martin DeMello
2009-09-10 14:03:46
+1
A:
I played around a bit with the earlier answer and got something that I found a little more fun to work with.
LIB
def gray(g); 232 + g; end
def rgb(red, green, blue); 16 + (red * 36) + (green * 6) + blue; end
def green; rgb(0,5,0); end
def red; rgb(5,0,0); end
def c( fg, bg = nil ); "#{fg ? "\x1b[38;5;#{fg}m" : ''}#{bg ? "\x1b[48;5;#{bg}m" : ''}" end
def ec; "\x1b[0m"; end
EXAMPLE USAGE
BASE_DIR = File.expand_path( File.join( File.dirname(__FILE__), '..' ) )
def status( sDaemon )
b = File.exist?( File.join( BASE_DIR, 'pids', "#{sDaemon}.pid" ) )
puts c( b ? green : red ) + sDaemon + ( b ? ' RUNNING' : ' STOPPED' ) + ec
end
%w{ backuper emailSpamChecker indexer log2email orderManager sitemapProducer }.each { |s| status s }
Peder
2010-01-04 21:51:13