def change_resolution(resolution):
"""Change display resolution.
Takes a string for single monitors or a list of displays as returned
by get_outputs().
"""
if not resolution:
logger.warning("No resolution provided")
return
if isinstance(resolution, str):
logger.debug("Switching resolution to %s", resolution)
if resolution not in get_resolutions():
logger.warning("Resolution %s doesn't exist.", resolution)
else:
logger.info("Changing resolution to %s", resolution)
with subprocess.Popen(
[LINUX_SYSTEM.get("xrandr"), "-s", resolution]) as xrandr:
xrandr.communicate()
else:
for display in resolution:
logger.debug("Switching to %s on %s", display.mode, display.name)
if display.rotation is not None and display.rotation in (
"normal",
"left",
"right",
"inverted",
):
rotation = display.rotation
else:
rotation = "normal"
logger.info("Switching resolution of %s to %s", display.name,
display.mode)
with subprocess.Popen([
LINUX_SYSTEM.get("xrandr"),
"--output",
display.name,
"--mode",
display.mode,
"--pos",
display.position,
"--rotate",
rotation,
"--rate",
display.rate,
]) as xrandr:
xrandr.communicate()
def find_executable(exec_name):
"""Return the absolute path of an executable"""
if not exec_name:
return None
cached = LINUX_SYSTEM.get(exec_name)
if cached:
return cached
return shutil.which(exec_name)
def find_executable(exec_name):
"""Return the absolute path of an executable"""
if not exec_name:
return None
cached = LINUX_SYSTEM.get(exec_name)
if cached:
return cached
return shutil.which(exec_name)
def turn_off_except(display):
"""Use XrandR to turn off displays except the one referenced by `display`"""
if not display:
logger.error("No active display given, no turning off every display")
return
for output in get_outputs():
if output.name != display:
logger.info("Turning off %s", output[0])
with subprocess.Popen(
[LINUX_SYSTEM.get("xrandr"), "--output", output.name,
"--off"]) as xrandr:
xrandr.communicate()
def _get_vidmodes():
"""Return video modes from XrandR"""
logger.debug("Retrieving video modes from XrandR")
return read_process_output([LINUX_SYSTEM.get("xrandr")]).split("\n")
