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# Copyright 2018 ke liang <lokyse@163.com>.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
import logging
from logging import Formatter
ATTRIBUTES = {
'normal': 0,
'bold': 1,
'underline': 4,
'blink': 5,
'invert': 7,
'hide': 8,
}
HIGHLIGHTS = {
'black': 40,
'red': 41,
'green': 42,
'yellow': 43,
'blue': 44,
'purple': 45,
'cyan': 46,
'white': 47,
}
COLORS = {
'black': 30,
'red': 31,
'green': 32,
'yellow': 33,
'blue': 34,
'purple': 35,
'cyan': 36,
'white': 37,
}
COLOR_TAG = "color"
HIGHLIGHT_TAG = "highlight"
ATTRIBUTE_TAG = "attribute"
RESET = '\033[0m'
def colored(text, color=None, on_color=None, attrs=None):
# It can't support windows system cmd right now!
# TODO: colered output on windows system cmd
if os.name in ('nt', 'ce'):
return text
if isinstance(attrs, str):
attrs = [attrs]
if os.getenv('ANSI_COLORS_DISABLED', None) is None:
fmt_str = '\033[%dm%s'
if color is not None and isinstance(color, str):
text = fmt_str % (COLORS.get(color, 0), text)
if on_color is not None and isinstance(on_color, str):
text = fmt_str % (HIGHLIGHTS.get(on_color, 0), text)
if attrs is not None:
for attr in attrs:
text = fmt_str % (ATTRIBUTES.get(attr, 0), text)
# keep origin color for tail spaces
text += RESET
return text
class BaseColorFormatter(Formatter):
def __init__(self, fmt=None, datefmt=None, colorfmt=None, style="%"):
if sys.version_info > (3, 2):
super(BaseColorFormatter, self).__init__(
fmt=fmt, datefmt=datefmt, style=style)
elif sys.version_info > (2, 7):
super(BaseColorFormatter, self).__init__(fmt, datefmt)
else:
Formatter.__init__(self, fmt, datefmt)
self.style = style
if sys.version_info > (3, 2):
if self.style not in logging._STYLES:
raise ValueError('Style must be one of: %s' % ','.join(
logging._STYLES.keys()))
self.colorfmt = colorfmt
def _parseColor(self, record):
"""
color formatter for instance:
{
"logging-levelname":
{
"color":"<COLORS>",
"highlight":"<HIGHLIGHTS>",
"attribute":"<ATTRIBUTES>",
}
}
:param record:
:return: text color, background color, text attribute
"""
if self.colorfmt and isinstance(self.colorfmt, dict):
level = record.levelname
colors = self.colorfmt.get(level, None)
if colors is not None and isinstance(colors, dict):
return colors.get(COLOR_TAG, None), \
colors.get(HIGHLIGHT_TAG, None), \
colors.get(ATTRIBUTE_TAG, None)
return None, None, None
def format(self, record):
if sys.version_info > (2, 7):
s = super(BaseColorFormatter, self).format(record)
else:
s = Formatter.format(self, record)
color, on_color, attribute = self._parseColor(record)
return colored(s, color, on_color, attrs=attribute)
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