96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
import os
|
|
|
|
from fabric.core.service import Property, Service, Signal
|
|
from fabric.utils import exec_shell_command_async, monitor_file
|
|
from gi.repository import GLib
|
|
from loguru import logger
|
|
|
|
|
|
def exec_brightnessctl_async(args: str):
|
|
exec_shell_command_async(f"brightnessctl {args}", lambda _: None)
|
|
|
|
|
|
# Discover screen backlight device
|
|
try:
|
|
screen_device = os.listdir("/sys/class/backlight")
|
|
screen_device = screen_device[0] if screen_device else ""
|
|
except FileNotFoundError:
|
|
logger.error(f"No backlight devices found, brightness control disabled")
|
|
screen_device = ""
|
|
|
|
|
|
class Brightness(Service):
|
|
"""Service to manage screen brightness levels."""
|
|
|
|
instance = None
|
|
|
|
@staticmethod
|
|
def get_initial():
|
|
if Brightness.instance is None:
|
|
Brightness.instance = Brightness()
|
|
|
|
return Brightness.instance
|
|
|
|
@Signal
|
|
def screen(self, value: int) -> None:
|
|
"""Signal emitted when screen brightness changes."""
|
|
# Implement as needed for your application
|
|
|
|
def __init__(self, **kwargs):
|
|
super().__init__(**kwargs)
|
|
|
|
# Path for screen backlight control
|
|
self.screen_backlight_path = f"/sys/class/backlight/{screen_device}"
|
|
|
|
# Initialize maximum brightness level
|
|
self.max_screen = self.do_read_max_brightness(self.screen_backlight_path)
|
|
|
|
if screen_device == "":
|
|
return
|
|
|
|
# Monitor screen brightness file
|
|
self.screen_monitor = monitor_file(f"{self.screen_backlight_path}/brightness")
|
|
|
|
self.screen_monitor.connect(
|
|
"changed",
|
|
lambda _, file, *args: self.emit(
|
|
"screen",
|
|
round(int(file.load_bytes()[0].get_data())),
|
|
),
|
|
)
|
|
|
|
# Log the initialization of the service
|
|
logger.info(f"Brightness service initialized for device: {screen_device}")
|
|
|
|
def do_read_max_brightness(self, path: str) -> int:
|
|
# Reads the maximum brightness value from the specified path.
|
|
max_brightness_path = os.path.join(path, "max_brightness")
|
|
if os.path.exists(max_brightness_path):
|
|
with open(max_brightness_path) as f:
|
|
return int(f.readline())
|
|
return -1 # Return -1 if file doesn't exist, indicating an error.
|
|
|
|
@Property(int, "read-write")
|
|
def screen_brightness(self) -> int:
|
|
# Property to get or set the screen brightness.
|
|
brightness_path = os.path.join(self.screen_backlight_path, "brightness")
|
|
if os.path.exists(brightness_path):
|
|
with open(brightness_path) as f:
|
|
return int(f.readline())
|
|
logger.warning(f"Brightness file does not exist: {brightness_path}")
|
|
return -1 # Return -1 if file doesn't exist, indicating error.
|
|
|
|
@screen_brightness.setter
|
|
def screen_brightness(self, value: int):
|
|
# Setter for screen brightness property.
|
|
if not (0 <= value <= self.max_screen):
|
|
value = max(0, min(value, self.max_screen))
|
|
|
|
try:
|
|
exec_brightnessctl_async(f"--device '{screen_device}' set {value}")
|
|
self.emit("screen", int((value / self.max_screen) * 100))
|
|
except GLib.Error as e:
|
|
logger.error(f"Error setting screen brightness: {e.message}")
|
|
except Exception as e:
|
|
logger.exception(f"Unexpected error setting screen brightness: {e}")
|