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"""module with the Writer class that helps write colorful output"""
class Writer(object):
"Class which helps to print in color and with alignment and width"
color_templates = (
("Black" , "0;30"),
("Red" , "0;31"),
("Green" , "0;32"),
("Brown" , "0;33"),
("Blue" , "0;34"),
("Purple" , "0;35"),
("Cyan" , "0;36"),
("LightGray" , "0;37"),
("DarkGray" , "1;30"),
("LightRed" , "1;31"),
("LightGreen" , "1;32"),
("Yellow" , "1;33"),
("LightBlue" , "1;34"),
("LightPurple" , "1;35"),
("LightCyan" , "1;36"),
("White" , "1;37"), )
colors = dict(color_templates)
c_normal = '\033[0m'
c_color = '\033[%sm'
def __init__(self, in_file = None):
import sys
self._line_wrap = False
self._write_pos = 0
self._file = in_file or sys.stdout
#self._file = sys.stdout
if not (hasattr(self._file, 'isatty') and self._file.isatty()):
# the stdout is not a terminal, this for example happens if the
# output is piped to less, e.g. "bin/test | less". In this case,
# the terminal control sequences would be printed verbatim, so
# don't use any colors.
self.write = self.normal_write
elif sys.platform != "win32":
# We are on *nix system we can use ansi
self.write = self.ansi_write
else:
try:
import colorama
colorama.init(wrap=False)
self._file = colorama.AnsiToWin32(self._file).stream
self.write = self.ansi_write
except ImportError:
self.write = self.normal_write
def write(self, text, color="", align="left", width=80):
"""
Prints a text on the screen.
It uses file.write(), so no readline library is necessary.
color ... choose from the colors below, "" means default color
align ... left/right, left is a normal print, right is aligned on the
right hand side of the screen, filled with " " if necessary
width ... the screen width
"""
def normal_write(self, text, color="", align="left", width=80):
"Ignores color but uses alignment and width"
_color = color
if align == "right":
if self._write_pos + len(text) > width:
# we don't fit on the current line, create a new line
self.write("\n")
self.write(" " * (width - self._write_pos - len(text)))
if self._line_wrap:
if text != "" and text[0] != "\n":
self._file.write("\n")
self._file.write(text)
self._file.flush()
next_new_line = text.rfind("\n")
if next_new_line == -1:
self._write_pos += len(text)
else:
self._write_pos = len(text) - next_new_line - 1
self._line_wrap = self._write_pos >= width
self._write_pos %= width
def ansi_write(self, text, color="", align="left", width=80):
"Writes with color, alignment and width"
try:
return self.normal_write(
text=(
"%s%s%s" % (
self.c_color % self.colors[color],
text,
self.c_normal
)
if color in self.colors
else text
),
color=color,
align=align,
width=width
)
except AssertionError:
return self.normal_write(
text=text,
color=color,
align=align,
width=width
)
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