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# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
'''
This module generates ANSI character codes to printing colors to terminals.
See: http://en.wikipedia.org/wiki/ANSI_escape_code
'''
CSI = '\033['
OSC = '\033]'
BEL = '\a'
def code_to_chars(code):
return CSI + str(code) + 'm'
def set_title(title):
return OSC + '2;' + title + BEL
def clear_screen(mode=2):
return CSI + str(mode) + 'J'
def clear_line(mode=2):
return CSI + str(mode) + 'K'
class AnsiCodes(object):
def __init__(self):
# the subclasses declare class attributes which are numbers.
# Upon instantiation we define instance attributes, which are the same
# as the class attributes but wrapped with the ANSI escape sequence
for name in dir(self):
if not name.startswith('_'):
value = getattr(self, name)
setattr(self, name, code_to_chars(value))
class AnsiCursor(object):
def UP(self, n=1):
return CSI + str(n) + 'A'
def DOWN(self, n=1):
return CSI + str(n) + 'B'
def FORWARD(self, n=1):
return CSI + str(n) + 'C'
def BACK(self, n=1):
return CSI + str(n) + 'D'
def POS(self, x=1, y=1):
return CSI + str(y) + ';' + str(x) + 'H'
class AnsiFore(AnsiCodes):
BLACK = 30
RED = 31
GREEN = 32
YELLOW = 33
BLUE = 34
MAGENTA = 35
CYAN = 36
WHITE = 37
RESET = 39
# These are fairly well supported, but not part of the standard.
LIGHTBLACK_EX = 90
LIGHTRED_EX = 91
LIGHTGREEN_EX = 92
LIGHTYELLOW_EX = 93
LIGHTBLUE_EX = 94
LIGHTMAGENTA_EX = 95
LIGHTCYAN_EX = 96
LIGHTWHITE_EX = 97
class AnsiBack(AnsiCodes):
BLACK = 40
RED = 41
GREEN = 42
YELLOW = 43
BLUE = 44
MAGENTA = 45
CYAN = 46
WHITE = 47
RESET = 49
# These are fairly well supported, but not part of the standard.
LIGHTBLACK_EX = 100
LIGHTRED_EX = 101
LIGHTGREEN_EX = 102
LIGHTYELLOW_EX = 103
LIGHTBLUE_EX = 104
LIGHTMAGENTA_EX = 105
LIGHTCYAN_EX = 106
LIGHTWHITE_EX = 107
class AnsiStyle(AnsiCodes):
BRIGHT = 1
DIM = 2
NORMAL = 22
RESET_ALL = 0
Fore = AnsiFore()
Back = AnsiBack()
Style = AnsiStyle()
Cursor = AnsiCursor()
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