mirror of
https://forge.fsky.io/oneflux/omegafox.git
synced 2026-02-10 06:32:05 -08:00
120 lines
3.2 KiB
Python
120 lines
3.2 KiB
Python
import os
|
|
import subprocess # nosec
|
|
from glob import glob
|
|
from shutil import which
|
|
from typing import List, Optional
|
|
|
|
from camoufox.exceptions import CannotExecuteXvfb, CannotFindXvfb
|
|
|
|
|
|
class VirtualDisplay:
|
|
"""
|
|
A minimal virtual display implementation for Linux.
|
|
"""
|
|
|
|
def __init__(self) -> None:
|
|
"""
|
|
Constructor for the VirtualDisplay class (singleton object).
|
|
"""
|
|
self.proc: Optional[subprocess.Popen] = None
|
|
self._display: Optional[int] = None
|
|
|
|
xvfb_args = (
|
|
# fmt: off
|
|
"-screen", "0", "1x1x8",
|
|
"-ac",
|
|
"-nolisten", "tcp",
|
|
"-extension", "RENDER",
|
|
"-extension", "GLX",
|
|
"-extension", "COMPOSITE",
|
|
"-extension", "XVideo",
|
|
"-extension", "XVideo-MotionCompensation",
|
|
"-extension", "XINERAMA",
|
|
"-shmem",
|
|
"-fp", "built-ins",
|
|
"-nocursor",
|
|
"-br",
|
|
# fmt: on
|
|
)
|
|
|
|
@property
|
|
def xvfb_path(self) -> str:
|
|
"""
|
|
Get the path to the xvfb executable
|
|
"""
|
|
path = which("Xvfb")
|
|
if not path:
|
|
raise CannotFindXvfb("Please install Xvfb to use headless mode.")
|
|
if not os.access(path, os.X_OK):
|
|
raise CannotExecuteXvfb(f"I do not have permission to execute Xvfb: {path}")
|
|
return path
|
|
|
|
@property
|
|
def xvfb_cmd(self) -> List[str]:
|
|
"""
|
|
Get the xvfb command
|
|
"""
|
|
return [self.xvfb_path, f':{self.display}', *self.xvfb_args]
|
|
|
|
def execute_xvfb_singleton(self, debug: Optional[bool] = False):
|
|
"""
|
|
Spawn a detatched process
|
|
"""
|
|
if debug:
|
|
print('Starting virtual display:', ' '.join(self.xvfb_cmd))
|
|
self.proc = subprocess.Popen( # nosec
|
|
self.xvfb_cmd,
|
|
stdout=None if debug else subprocess.DEVNULL,
|
|
stderr=None if debug else subprocess.DEVNULL,
|
|
)
|
|
|
|
def new_or_reuse(self, debug: Optional[bool] = False) -> str:
|
|
"""
|
|
Get the display number
|
|
"""
|
|
if self.proc is None:
|
|
self.execute_xvfb_singleton(debug)
|
|
elif debug:
|
|
print(f'Using virtual display: {self.display}')
|
|
return f':{self.display}'
|
|
|
|
def __del__(self):
|
|
"""
|
|
Terminate the xvfb process
|
|
"""
|
|
if self.proc:
|
|
self.proc.terminate()
|
|
|
|
@staticmethod
|
|
def _get_lock_files() -> List[str]:
|
|
"""
|
|
Get list of lock files in /tmp
|
|
"""
|
|
tmpd = os.environ.get('TMPDIR', '/tmp') # nosec
|
|
try:
|
|
lock_files = glob(os.path.join(tmpd, ".X*-lock"))
|
|
except FileNotFoundError:
|
|
return []
|
|
return [p for p in lock_files if os.path.isfile(p)]
|
|
|
|
@staticmethod
|
|
def _free_display() -> int:
|
|
"""
|
|
Search for free display
|
|
"""
|
|
ls = list(
|
|
map(lambda x: int(x.split("X")[1].split("-")[0]), VirtualDisplay._get_lock_files())
|
|
)
|
|
return max(99, max(ls) + 3) if ls else 99
|
|
|
|
@property
|
|
def display(self) -> int:
|
|
"""
|
|
Get the display number
|
|
"""
|
|
if self._display is None:
|
|
self._display = self._free_display()
|
|
return self._display
|
|
|
|
|
|
VIRTUAL_DISPLAY = VirtualDisplay()
|