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# -*- coding: utf-8 -*-
"""
Color schemes for exception handling code in IPython.
"""
import os
import warnings
#*****************************************************************************
# Copyright (C) 2005-2006 Fernando Perez <fperez@colorado.edu>
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#*****************************************************************************
from IPython.utils.coloransi import ColorSchemeTable, TermColors, ColorScheme
def exception_colors():
"""Return a color table with fields for exception reporting.
The table is an instance of ColorSchemeTable with schemes added for
'Neutral', 'Linux', 'LightBG' and 'NoColor' and fields for exception handling filled
in.
Examples:
>>> ec = exception_colors()
>>> ec.active_scheme_name
''
>>> print(ec.active_colors)
None
Now we activate a color scheme:
>>> ec.set_active_scheme('NoColor')
>>> ec.active_scheme_name
'NoColor'
>>> sorted(ec.active_colors.keys())
['Normal', 'caret', 'em', 'excName', 'filename', 'filenameEm', 'line',
'lineno', 'linenoEm', 'name', 'nameEm', 'normalEm', 'topline', 'vName',
'val', 'valEm']
"""
ex_colors = ColorSchemeTable()
# Populate it with color schemes
C = TermColors # shorthand and local lookup
ex_colors.add_scheme(ColorScheme(
'NoColor',
# The color to be used for the top line
topline = C.NoColor,
# The colors to be used in the traceback
filename = C.NoColor,
lineno = C.NoColor,
name = C.NoColor,
vName = C.NoColor,
val = C.NoColor,
em = C.NoColor,
# Emphasized colors for the last frame of the traceback
normalEm = C.NoColor,
filenameEm = C.NoColor,
linenoEm = C.NoColor,
nameEm = C.NoColor,
valEm = C.NoColor,
# Colors for printing the exception
excName = C.NoColor,
line = C.NoColor,
caret = C.NoColor,
Normal = C.NoColor
))
# make some schemes as instances so we can copy them for modification easily
ex_colors.add_scheme(ColorScheme(
'Linux',
# The color to be used for the top line
topline = C.LightRed,
# The colors to be used in the traceback
filename = C.Green,
lineno = C.Green,
name = C.Purple,
vName = C.Cyan,
val = C.Green,
em = C.LightCyan,
# Emphasized colors for the last frame of the traceback
normalEm = C.LightCyan,
filenameEm = C.LightGreen,
linenoEm = C.LightGreen,
nameEm = C.LightPurple,
valEm = C.LightBlue,
# Colors for printing the exception
excName = C.LightRed,
line = C.Yellow,
caret = C.White,
Normal = C.Normal
))
# For light backgrounds, swap dark/light colors
ex_colors.add_scheme(ColorScheme(
'LightBG',
# The color to be used for the top line
topline = C.Red,
# The colors to be used in the traceback
filename = C.LightGreen,
lineno = C.LightGreen,
name = C.LightPurple,
vName = C.Cyan,
val = C.LightGreen,
em = C.Cyan,
# Emphasized colors for the last frame of the traceback
normalEm = C.Cyan,
filenameEm = C.Green,
linenoEm = C.Green,
nameEm = C.Purple,
valEm = C.Blue,
# Colors for printing the exception
excName = C.Red,
#line = C.Brown, # brown often is displayed as yellow
line = C.Red,
caret = C.Normal,
Normal = C.Normal,
))
ex_colors.add_scheme(ColorScheme(
'Neutral',
# The color to be used for the top line
topline = C.Red,
# The colors to be used in the traceback
filename = C.LightGreen,
lineno = C.LightGreen,
name = C.LightPurple,
vName = C.Cyan,
val = C.LightGreen,
em = C.Cyan,
# Emphasized colors for the last frame of the traceback
normalEm = C.Cyan,
filenameEm = C.Green,
linenoEm = C.Green,
nameEm = C.Purple,
valEm = C.Blue,
# Colors for printing the exception
excName = C.Red,
#line = C.Brown, # brown often is displayed as yellow
line = C.Red,
caret = C.Normal,
Normal = C.Normal,
))
# Hack: the 'neutral' colours are not very visible on a dark background on
# Windows. Since Windows command prompts have a dark background by default, and
# relatively few users are likely to alter that, we will use the 'Linux' colours,
# designed for a dark background, as the default on Windows.
if os.name == "nt":
ex_colors.add_scheme(ex_colors['Linux'].copy('Neutral'))
return ex_colors
|
