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e58719d13c
When samba.colour is first imported, the function
colour.c_BLUE("samba")
will give you the string "\033[1;34msamba\033[0m", which will show up
as blue on an ANSI terminal. If you then go:
colour.switch_colour_off()
colour.c_BLUE("samba")
the c_BLUE call will return the uncoloured string "samba".
This is so things like samba-tool can do this sort of thing:
if not os.isatty(self.outf):
switch_colour_off()
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
91 lines
2.8 KiB
Python
91 lines
2.8 KiB
Python
# ANSI codes for 4 bit and xterm-256color
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#
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# Copyright (C) Andrew Bartlett 2018
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#
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# Originally written by Douglas Bagnall
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# The 4 bit colours are available as global variables with names like
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# RED, DARK_RED, REV_RED (for red background), and REV_DARK_RED. If
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# switch_colour_off() is called, these names will all point to the
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# empty string. switch_colour_on() restores the default values.
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#
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# The 256-colour codes are obtained using xterm_256_color(n), where n
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# is the number of the desired colour.
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def _gen_ansi_colours():
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g = globals()
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for i, name in enumerate(('BLACK', 'RED', 'GREEN', 'YELLOW', 'BLUE',
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'MAGENTA', 'CYAN', 'WHITE')):
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g[name] = "\033[1;3%dm" % i
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g['DARK_' + name] = "\033[3%dm" % i
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g['REV_' + name] = "\033[1;4%dm" % i
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g['REV_DARK_' + name] = "\033[4%dm" % i
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# kcc.debug uses these aliases (which make visual sense)
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g['PURPLE'] = DARK_MAGENTA
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g['GREY'] = DARK_WHITE
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# C_NORMAL resets to normal, whatever that is
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g['C_NORMAL'] = "\033[0m"
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# Non-colour ANSI codes.
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g['UNDERLINE'] = "\033[4m"
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_gen_ansi_colours()
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# Generate functions that colour a string. The functions look like
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# this:
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#
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# c_BLUE("hello") # "\033[1;34mhello\033[0m" -> blue text
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# c_DARK_RED(3) # 3 will be stringified and coloured
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#
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# but if colour is switched off, no colour codes are added.
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#
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# c_BLUE("hello") # "hello"
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#
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# The definition of the functions looks a little odd, because we want
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# to bake in the name of the colour but not its actual value.
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for _k in list(globals().keys()):
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if _k.isupper():
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def _f(s, name=_k):
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return "%s%s%s" % (globals()[name], s, C_NORMAL)
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globals()['c_%s' % _k] = _f
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del _k, _f
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def switch_colour_off():
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"""Convert all the ANSI colour codes into empty strings."""
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g = globals()
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for k, v in list(g.items()):
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if k.isupper() and isinstance(v, str) and v.startswith('\033'):
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g[k] = ''
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def switch_colour_on():
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"""Regenerate all the ANSI colour codes."""
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_gen_ansi_colours()
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def xterm_256_colour(n, bg=False, bold=False):
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weight = '01;' if bold else ''
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target = '48' if bg else '38'
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return "\033[%s%s;5;%dm" % (weight, target, int(n))
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