| # DExTer : Debugging Experience Tester |
| # ~~~~~~ ~ ~~ ~ ~~ |
| # |
| # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| # See https://llvm.org/LICENSE.txt for license information. |
| # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| """Provides Windows implementation of formatted/colored console output.""" |
| |
| import sys |
| |
| import ctypes |
| import ctypes.wintypes |
| |
| from ..PrettyOutputBase import PrettyOutputBase, Stream, _lock, _null_lock |
| |
| |
| class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure): |
| # pylint: disable=protected-access |
| _fields_ = [('dwSize', ctypes.wintypes._COORD), ('dwCursorPosition', |
| ctypes.wintypes._COORD), |
| ('wAttributes', |
| ctypes.c_ushort), ('srWindow', ctypes.wintypes._SMALL_RECT), |
| ('dwMaximumWindowSize', ctypes.wintypes._COORD)] |
| # pylint: enable=protected-access |
| |
| |
| class PrettyOutput(PrettyOutputBase): |
| |
| stdout = Stream(sys.stdout, ctypes.windll.kernel32.GetStdHandle(-11)) |
| stderr = Stream(sys.stderr, ctypes.windll.kernel32.GetStdHandle(-12)) |
| |
| def __enter__(self): |
| info = _CONSOLE_SCREEN_BUFFER_INFO() |
| |
| for s in (PrettyOutput.stdout, PrettyOutput.stderr): |
| ctypes.windll.kernel32.GetConsoleScreenBufferInfo( |
| s.os, ctypes.byref(info)) |
| s.orig_color = info.wAttributes |
| |
| return self |
| |
| def __exit__(self, *args): |
| self._restore_orig_color(PrettyOutput.stdout) |
| self._restore_orig_color(PrettyOutput.stderr) |
| |
| def _restore_orig_color(self, stream, lock=_lock): |
| if not stream.color_enabled: |
| return |
| |
| with lock: |
| stream = self._set_valid_stream(stream) |
| self.flush(stream) |
| if stream.orig_color: |
| ctypes.windll.kernel32.SetConsoleTextAttribute( |
| stream.os, stream.orig_color) |
| |
| def _color(self, text, color, stream, lock=_lock): |
| stream = self._set_valid_stream(stream) |
| with lock: |
| try: |
| if stream.color_enabled: |
| ctypes.windll.kernel32.SetConsoleTextAttribute( |
| stream.os, color) |
| self._write(text, stream) |
| finally: |
| if stream.color_enabled: |
| self._restore_orig_color(stream, lock=_null_lock) |
| |
| def red_impl(self, text, stream=None, **kwargs): |
| self._color(text, 12, stream, **kwargs) |
| |
| def yellow_impl(self, text, stream=None, **kwargs): |
| self._color(text, 14, stream, **kwargs) |
| |
| def green_impl(self, text, stream=None, **kwargs): |
| self._color(text, 10, stream, **kwargs) |
| |
| def blue_impl(self, text, stream=None, **kwargs): |
| self._color(text, 11, stream, **kwargs) |
| |
| def default_impl(self, text, stream=None, **kwargs): |
| stream = self._set_valid_stream(stream) |
| self._color(text, stream.orig_color, stream, **kwargs) |