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#!/usr/bin/env python3
import argparse
import enum
import subprocess
import sys
from gi.repository import GLib, Gio
NAME = 'org.gnome.Mutter.DisplayConfig'
INTERFACE = 'org.gnome.Mutter.DisplayConfig'
OBJECT_PATH = '/org/gnome/Mutter/DisplayConfig'
TRANSFORM_STRINGS = {
0: 'normal',
1: '90',
2: '180',
3: '270',
4: 'flipped',
5: 'flipped-90',
6: 'flipped-180',
7: 'flipped-270',
}
COLOR_MODES = {
0: 'default',
1: 'BT.2100',
}
class Source(enum.Enum):
DBUS = 1
COMMAND_LINE = 2
FILE = 3
class MonitorConfig:
CONFIG_VARIANT_TYPE = GLib.VariantType.new(
'(ua((ssss)a(siiddada{sv})a{sv})a(iiduba(ssss)a{sv})a{sv})')
def get_current_state(self) -> GLib.Variant:
raise NotImplementedError()
def parse_data(self):
"""TODO: add data parser so that can be used for reconfiguring"""
def print_data(self, *, level, is_last, lines, data):
if is_last:
link = '└'
else:
link = '├'
padding = ' '
if level >= 0:
indent = level
buffer = f'{link:{padding}>{indent * 4}}──{data}'
buffer = list(buffer)
for line in lines:
if line == level:
continue
index = line * 4
if line > 0:
index -= 1
buffer[index] = '│'
buffer = ''.join(buffer)
else:
buffer = data
print(buffer)
if is_last and level in lines:
lines.remove(level)
elif not is_last and level not in lines:
lines.append(level)
def maybe_describe(self, property, value):
if property == 'color-modes':
return [COLOR_MODES.get(color_mode)
for color_mode in value]
else:
return value
def print_properties(self, *, level, lines, properties):
property_list = list(properties)
self.print_data(level=level, is_last=True, lines=lines,
data=f'Properties: ({len(property_list)})')
for property in property_list:
is_last = property == property_list[-1]
property_value = self.maybe_describe(property, properties[property])
self.print_data(level=level + 1, is_last=is_last, lines=lines,
data=f'{property} ⇒ {property_value}')
def print_current_state(self, short):
variant = self.get_current_state()
print('Serial: {}'.format(variant[0]))
print()
print('Monitors:')
monitors = variant[1]
lines = []
for monitor in monitors:
is_last = monitor == monitors[-1]
spec = monitor[0]
modes = monitor[1]
properties = monitor[2]
self.print_data(level=0, is_last=is_last, lines=lines,
data='Monitor {}'.format(spec[0]))
self.print_data(level=1, is_last=False, lines=lines,
data=f'EDID: vendor: {spec[1]}, product: {spec[2]}, serial: {spec[3]}')
mode_count = len(modes)
if short:
modes = [mode for mode in modes if len(mode[6]) > 0]
self.print_data(level=1, is_last=False, lines=lines,
data=f'Modes ({len(modes)}, {mode_count - len(modes)} omitted)')
else:
self.print_data(level=1, is_last=False, lines=lines,
data=f'Modes ({len(modes)})')
for mode in modes:
is_last = mode == modes[-1]
self.print_data(level=2, is_last=is_last, lines=lines,
data=f'{mode[0]}')
self.print_data(level=3, is_last=False, lines=lines,
data=f'Dimension: {mode[1]}x{mode[2]}')
self.print_data(level=3, is_last=False, lines=lines,
data=f'Refresh rate: {mode[3]:.3f}')
self.print_data(level=3, is_last=False, lines=lines,
data=f'Preferred scale: {mode[4]}')
self.print_data(level=3, is_last=False, lines=lines,
data=f'Supported scales: {mode[5]}')
mode_properties = mode[6]
self.print_properties(level=3, lines=lines,
properties=mode_properties)
self.print_properties(level=1, lines=lines, properties=properties)
print()
print('Logical monitors:')
logical_monitors = variant[2]
index = 1
for logical_monitor in logical_monitors:
is_last = logical_monitor == logical_monitors[-1]
properties = logical_monitor[2]
self.print_data(level=0, is_last=is_last, lines=lines,
data=f'Logical monitor #{index}')
self.print_data(level=1, is_last=False, lines=lines,
data=f'Position: ({logical_monitor[0]}, {logical_monitor[1]})')
self.print_data(level=1, is_last=False, lines=lines,
data=f'Scale: {logical_monitor[2]}')
self.print_data(level=1, is_last=False, lines=lines,
data=f'Transform: {TRANSFORM_STRINGS.get(logical_monitor[3])}')
self.print_data(level=1, is_last=False, lines=lines,
data=f'Primary: {logical_monitor[4]}')
monitors = logical_monitor[5]
self.print_data(level=1, is_last=False, lines=lines,
data=f'Monitors: ({len(monitors)})')
for monitor in monitors:
is_last = monitor == monitors[-1]
self.print_data(level=2, is_last=is_last, lines=lines,
data=f'{monitor[0]} ({monitor[1]}, {monitor[2]}, {monitor[3]})')
properties = logical_monitor[6]
self.print_properties(level=1, lines=lines, properties=properties)
index += 1
properties = variant[3]
print()
self.print_properties(level=-1, lines=lines, properties=properties)
class MonitorConfigDBus(MonitorConfig):
def __init__(self):
self._proxy = Gio.DBusProxy.new_for_bus_sync(
bus_type=Gio.BusType.SESSION,
flags=Gio.DBusProxyFlags.NONE,
info=None,
name=NAME,
object_path=OBJECT_PATH,
interface_name=INTERFACE,
cancellable=None,
)
def get_current_state(self) -> GLib.Variant:
variant = self._proxy.call_sync(
method_name='GetCurrentState',
parameters=None,
flags=Gio.DBusCallFlags.NO_AUTO_START,
timeout_msec=-1,
cancellable=None
)
assert variant.get_type().equal(self.CONFIG_VARIANT_TYPE)
return variant
class MonitorConfigCommandLine(MonitorConfig):
def get_current_state(self) -> GLib.Variant:
command = ('gdbus call -e '
f'-d {NAME} '
f'-o {OBJECT_PATH} '
f'-m {INTERFACE}.GetCurrentState')
result = subprocess.run(command, shell=True,
check=True, capture_output=True, text=True)
return GLib.variant_parse(self.CONFIG_VARIANT_TYPE, result.stdout)
class MonitorConfigFile(MonitorConfig):
def __init__(self, file_path):
if file_path == '-':
self._data = sys.stdin.read()
else:
with open(file_path) as file:
self._data = file.read()
def get_current_state(self) -> GLib.Variant:
return GLib.variant_parse(self.CONFIG_VARIANT_TYPE, self._data)
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Get display state')
parser.add_argument('--file', metavar='FILE', type=str, nargs='?',
help='Read the output from gdbus call instead of calling D-Bus')
parser.add_argument('--gdbus', action='store_true')
parser.add_argument('--short', action='store_true')
args = parser.parse_args()
if args.file and args.gdbus:
raise argparse.ArgumentTypeError('Incompatible arguments')
if args.file:
monitor_config = MonitorConfigFile(args.file)
elif args.gdbus:
monitor_config = MonitorConfigCommandLine()
else:
monitor_config = MonitorConfigDBus()
monitor_config.print_current_state(short=args.short)
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