61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
# Copyright (C) 2018 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""This module is used for enabling formatting on Windows."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import ctypes
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import os
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import platform
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import subprocess
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import sys
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try:
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import colorama # pylint: disable=g-import-not-at-top, # pytype: disable=import-error
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HAS_COLORAMA = True
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except ImportError:
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HAS_COLORAMA = False
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def initialize_or_disable():
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"""Enables ANSI processing on Windows or disables it as needed."""
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if HAS_COLORAMA:
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wrap = True
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if sys.stdout.isatty() and platform.release() == '10':
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# Enables native ANSI sequences in console.
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# Windows 10, 2016, and 2019 only.
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wrap = False
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kernel32 = ctypes.windll.kernel32 # pytype: disable=module-attr
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enable_virtual_terminal_processing = 0x04
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out_handle = kernel32.GetStdHandle(subprocess.STD_OUTPUT_HANDLE) # pylint: disable=line-too-long, # pytype: disable=module-attr
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# GetConsoleMode fails if the terminal isn't native.
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mode = ctypes.wintypes.DWORD()
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if kernel32.GetConsoleMode(out_handle, ctypes.byref(mode)) == 0:
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wrap = True
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if not mode.value & enable_virtual_terminal_processing:
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if kernel32.SetConsoleMode(
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out_handle, mode.value | enable_virtual_terminal_processing) == 0:
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# kernel32.SetConsoleMode to enable ANSI sequences failed
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wrap = True
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colorama.init(wrap=wrap)
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else:
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os.environ['ANSI_COLORS_DISABLED'] = '1'
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if sys.platform.startswith('win'):
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initialize_or_disable()
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