51 lines
1.9 KiB
Python
Executable File
51 lines
1.9 KiB
Python
Executable File
#!/usr/bin/env python3
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# Freeze/resume the focused window on the controller's Home/guide button (BTN_MODE).
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# Stdlib only: reads raw evdev events. Gamepads are readable by the seat user.
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import glob, os, select, signal, struct, subprocess, time
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EV_KEY, BTN_MODE = 1, 0x13c
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EVENT = struct.Struct('llHHi') # struct input_event
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LONG_BITS = struct.calcsize('l') * 8
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CMD = [os.path.expanduser('~/.config/i3/scripts/freeze-toggle')]
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signal.signal(signal.SIGCHLD, signal.SIG_IGN) # auto-reap child processes
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def has_btn_mode(path):
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try:
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with open(f'/sys/class/input/{os.path.basename(path)}/device/capabilities/key') as f:
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words = f.read().split()
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except OSError:
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return False
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bits = 0
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for w in words:
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bits = bits << LONG_BITS | int(w, 16)
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return bits >> BTN_MODE & 1
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fds = {} # fd -> device path
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last = 0.0
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rescan = 0.0
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while True:
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if time.monotonic() >= rescan: # pick up hotplugged controllers
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for path in glob.glob('/dev/input/event*'):
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if path not in fds.values() and has_btn_mode(path):
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try:
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fds[os.open(path, os.O_RDONLY)] = path
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except OSError:
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pass
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rescan = time.monotonic() + 2
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ready, _, _ = select.select(list(fds), [], [], 2)
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for fd in ready:
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try:
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data = os.read(fd, EVENT.size * 64)
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except OSError: # controller unplugged
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os.close(fd)
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del fds[fd]
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continue
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for sec, usec, type_, code, value in EVENT.iter_unpack(data):
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if type_ == EV_KEY and code == BTN_MODE and value == 1:
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now = sec + usec / 1e6
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if now - last < 0.4: # GuliKit's Home button double-fires ~10ms apart
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continue
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last = now
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subprocess.Popen(CMD, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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