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from typing import Dict, List, Optional, Tuple
from pyvirtualdisplay.xephyr import XephyrDisplay
from pyvirtualdisplay.xvfb import XvfbDisplay
from pyvirtualdisplay.xvnc import XvncDisplay
_class_map = {"xvfb": XvfbDisplay, "xvnc": XvncDisplay, "xephyr": XephyrDisplay}
class Display(object):
"""
Proxy class
:param color_depth: [8, 16, 24, 32]
:param size: screen size (width,height)
:param bgcolor: background color ['black' or 'white']
:param visible: True -> Xephyr, False -> Xvfb
:param backend: 'xvfb', 'xvnc' or 'xephyr', ignores ``visible``
:param xauth: If a Xauthority file should be created.
:param manage_global_env: if True then $DISPLAY is set in os.environ
which is not thread-safe. Use False to make it thread-safe.
"""
def __init__(
self,
backend: Optional[str] = None,
visible: bool = False,
size: Tuple[int, int] = (1024, 768),
color_depth: int = 24,
bgcolor: str = "black",
use_xauth: bool = False,
# check_startup=False,
retries: int = 10,
extra_args: List[str] = [],
manage_global_env: bool = True,
**kwargs
):
self._color_depth = color_depth
self._size = size
self._bgcolor = bgcolor
self._visible = visible
self._backend = backend
if not self._backend:
if self._visible:
self._backend = "xephyr"
else:
self._backend = "xvfb"
cls = _class_map.get(self._backend)
if not cls:
raise ValueError("unknown backend: %s" % self._backend)
self._obj = cls(
size=size,
color_depth=color_depth,
bgcolor=bgcolor,
retries=retries,
use_xauth=use_xauth,
# check_startup=check_startup,
extra_args=extra_args,
manage_global_env=manage_global_env,
**kwargs
)
def start(self) -> "Display":
"""
start display
:rtype: self
"""
self._obj.start()
return self
def stop(self) -> "Display":
"""
stop display
:rtype: self
"""
self._obj.stop()
return self
def __enter__(self):
"""used by the :keyword:`with` statement"""
self.start()
return self
def __exit__(self, *exc_info):
"""used by the :keyword:`with` statement"""
self.stop()
def is_alive(self) -> bool:
return self._obj.is_alive()
# @property
# def return_code(self):
# return self._obj.return_code
@property
def pid(self) -> int:
"""
PID (:attr:`subprocess.Popen.pid`)
:rtype: int
"""
return self._obj.pid
@property
def display(self) -> int:
"""The new $DISPLAY variable as int. Example 1 if $DISPLAY=':1'"""
return self._obj.display
@property
def new_display_var(self) -> str:
"""The new $DISPLAY variable like ':1'"""
return self._obj.new_display_var
def env(self) -> Dict[str, str]:
"""env() copies global os.environ and adds disp.new_display_var"""
return self._obj._env()