godot/misc/utility/color.py

130 lines
4 KiB
Python

from __future__ import annotations
import os
import sys
from enum import Enum
from typing import Final
# Colors are disabled in non-TTY environments such as pipes. This means if output is redirected
# to a file, it won't contain color codes. Colors are always enabled on continuous integration.
IS_CI: Final[bool] = bool(os.environ.get("CI"))
STDOUT_TTY: Final[bool] = bool(sys.stdout.isatty())
STDERR_TTY: Final[bool] = bool(sys.stderr.isatty())
def _color_supported(stdout: bool) -> bool:
"""
Validates if the current environment supports colored output. Attempts to enable ANSI escape
code support on Windows 10 and later.
"""
if IS_CI:
return True
if sys.platform != "win32":
return STDOUT_TTY if stdout else STDERR_TTY
else:
from ctypes import POINTER, WINFUNCTYPE, WinError, windll
from ctypes.wintypes import BOOL, DWORD, HANDLE
STD_HANDLE = -11 if stdout else -12
ENABLE_VIRTUAL_TERMINAL_PROCESSING = 4
def err_handler(result, func, args):
if not result:
raise WinError()
return args
GetStdHandle = WINFUNCTYPE(HANDLE, DWORD)(("GetStdHandle", windll.kernel32), ((1, "nStdHandle"),))
GetConsoleMode = WINFUNCTYPE(BOOL, HANDLE, POINTER(DWORD))(
("GetConsoleMode", windll.kernel32),
((1, "hConsoleHandle"), (2, "lpMode")),
)
GetConsoleMode.errcheck = err_handler
SetConsoleMode = WINFUNCTYPE(BOOL, HANDLE, DWORD)(
("SetConsoleMode", windll.kernel32),
((1, "hConsoleHandle"), (1, "dwMode")),
)
SetConsoleMode.errcheck = err_handler
try:
handle = GetStdHandle(STD_HANDLE)
flags = GetConsoleMode(handle)
SetConsoleMode(handle, flags | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
return True
except OSError:
return False
STDOUT_COLOR: Final[bool] = _color_supported(True)
STDERR_COLOR: Final[bool] = _color_supported(False)
_stdout_override: bool = STDOUT_COLOR
_stderr_override: bool = STDERR_COLOR
def toggle_color(stdout: bool, value: bool | None = None) -> None:
"""
Explicitly toggle color codes, regardless of support.
- `stdout`: A boolean to choose the output stream. `True` for stdout, `False` for stderr.
- `value`: An optional boolean to explicitly set the color state instead of toggling.
"""
if stdout:
global _stdout_override
_stdout_override = value if value is not None else not _stdout_override
else:
global _stderr_override
_stderr_override = value if value is not None else not _stderr_override
class Ansi(Enum):
"""
Enum class for adding ansi codepoints directly into strings. Automatically converts values to
strings representing their internal value.
"""
RESET = "\x1b[0m"
BOLD = "\x1b[1m"
DIM = "\x1b[2m"
ITALIC = "\x1b[3m"
UNDERLINE = "\x1b[4m"
STRIKETHROUGH = "\x1b[9m"
REGULAR = "\x1b[22;23;24;29m"
BLACK = "\x1b[30m"
RED = "\x1b[31m"
GREEN = "\x1b[32m"
YELLOW = "\x1b[33m"
BLUE = "\x1b[34m"
MAGENTA = "\x1b[35m"
CYAN = "\x1b[36m"
WHITE = "\x1b[37m"
GRAY = "\x1b[90m"
def __str__(self) -> str:
return self.value
def print_info(*values: object) -> None:
"""Prints a informational message with formatting."""
if _stdout_override:
print(f"{Ansi.GRAY}{Ansi.BOLD}INFO:{Ansi.REGULAR}", *values, Ansi.RESET)
else:
print("INFO:", *values)
def print_warning(*values: object) -> None:
"""Prints a warning message with formatting."""
if _stderr_override:
print(f"{Ansi.YELLOW}{Ansi.BOLD}WARNING:{Ansi.REGULAR}", *values, Ansi.RESET, file=sys.stderr)
else:
print("WARNING:", *values, file=sys.stderr)
def print_error(*values: object) -> None:
"""Prints an error message with formatting."""
if _stderr_override:
print(f"{Ansi.RED}{Ansi.BOLD}ERROR:{Ansi.REGULAR}", *values, Ansi.RESET, file=sys.stderr)
else:
print("ERROR:", *values, file=sys.stderr)