mirror of https://github.com/ralsina/xrandroll.git
52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
"""Read/Write system display state using xrandr."""
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import subprocess
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from .monitor import Monitor, _split_by_lines_matching
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def is_replica_of(a, b):
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"""Return True if monitor a is a replica of b.
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Replica means same resolution and position.
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"""
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return (
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a.pos_x == b.pos_x
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and a.pos_y == b.pos_y
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and a.res_x == b.res_x
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and a.res_y == b.res_y
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and b.enabled
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)
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class Screen:
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"""A Screen is a collection of monitors."""
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def __init__(self, data):
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self.monitors = {}
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for monitor_data in _split_by_lines_matching(r"^[^ \t].*", data[1:]):
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m = Monitor(monitor_data)
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self.monitors[m.output] = m
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self.update_replica_of()
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def update_replica_of(self):
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"""Decide which monitors are replicas of each other and
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mark them as such."""
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for a in self.monitors:
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self.monitors[a].replica_of = []
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for b in self.monitors:
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if a != b and is_replica_of(self.monitors[a], self.monitors[b]):
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self.monitors[a].replica_of.append(b)
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def read_data():
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data = subprocess.check_output(
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["xrandr", "--verbose"], encoding="utf-8"
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).splitlines()
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return data
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def parse_data(data):
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# Going to pretend there can only be one screen because life is short.
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return Screen(_split_by_lines_matching("^Screen ", data)[0])
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