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-- SPDX-License-Identifier: MIT
--
-- This is an example libinput plugin
--
-- This plugin delays any event with relative motion by the given DELAY
-- by storing it in a table and replaying it via a timer callback later.
-- UNCOMMENT THIS LINE TO ACTIVATE THE PLUGIN
-- libinput:register({1})
DELAY = 1500 * 1000 -- 1.5s
next_timer_expiry = 0
devices = {}
function timer_expired(time_in_microseconds)
next_timer_expiry = 0
for device, frames in pairs(devices) do
while #frames > 0 and frames[1].time <= time_in_microseconds do
--- we don't have a current frame so it doesn't matter
--- whether we prepend or append
device:prepend_frame(frames[1].frame)
table.remove(frames, 1)
end
local next_frame = frames[1]
if next_frame and (next_timer_expiry == 0 or next_frame.time < next_timer_expiry) then
next_timer_expiry = next_frame.time
end
end
if next_timer_expiry ~= 0 then
libinput:timer_set_absolute(next_timer_expiry)
end
end
function frame(device, frame, timestamp)
for _, v in ipairs(frame) do
if v.usage == evdev.REL_X or v.usage == evdev.REL_Y then
local next_time = timestamp + DELAY
table.insert(devices[device], {
time = next_time,
frame = frame
})
if next_timer_expiry == 0 then
next_timer_expiry = next_time
libinput:timer_set_absolute(next_timer_expiry)
end
return {} -- discard frame
end
end
return nil
end
function device_new(device)
local usages = device:usages()
if usages[evdev.REL_X] then
devices[device] = {}
device:connect("evdev-frame", frame)
device:connect("device-removed", function(dev)
devices[dev] = nil
end)
end
end
libinput:connect("new-evdev-device", device_new)
libinput:connect("timer-expired", timer_expired)
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