mirror of
https://gitlab.freedesktop.org/libinput/libinput.git
synced 2025-12-20 04:30:06 +01:00
9e37bc0cfa
This patch adds support for Lua scripts to modify evdev devices and
event frames before libinput sees those events.
Plugins in Lua are sandboxed and restricted in what they can do: no IO,
no network, not much of anything else.
A plugin is notified about a new device before libinput handles it and
it can thus modify that device (changes are passed through to our libevdev
context). A plugin can then also connect an evdev frame handler which
gives it access to the evdev frames before libinput processes them. The
example plugin included shows how to swap left/right mouse buttons:
libinput:register({1})
function frame(device, frame)
for _, v in ipairs(frame.events) do
if v.usage == evdev.BTN_RIGHT then
v.usage = evdev.BTN_LEFT
elseif v.usage == evdev.BTN_LEFT then
v.usage = evdev.BTN_RIGHT
end
end
return frame
end
function device_new(plugin, device)
local usages = device:usages()
if usages[evdev.BTN_LEFT] and usages[evdev.BTN_RIGHT] then
device:connect("evdev-frame", frame)
end
end
libinput:connect("new-evdev-device", device_new)
A few other example plugins are included in this patch
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1192>
32 lines
1.1 KiB
Lua
32 lines
1.1 KiB
Lua
-- SPDX-License-Identifier: MIT
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--
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-- This plugin inverts the horizontal scroll direction of
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-- the Logitech MX Master mouse. OOTB the mouse scrolls
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-- in the opposite direction to all other mice out there.
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--
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-- This plugin is only needed when the mouse is connected
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-- to the Logitech Bolt receiver - on that receiver we cannot
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-- tell which device is connected.
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--
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-- For the Logitech Unifying receiver and Bluetooth please
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-- add the ModelInvertHorizontalScrolling=1 quirk
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-- in quirks/30-vendor-logitech.quirks.
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--
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--
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-- Install this file in /etc/libinput/plugins and
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--
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-- UNCOMMENT THIS LINE TO ACTIVATE THE PLUGIN
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-- libinput:register({1})
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libinput:connect("new-evdev-device", function (_, device)
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local info = device:info()
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if info.vid == 0x046D and info.pid == 0xC548 then
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device:connect("evdev-frame", function (_, frame, timestamp)
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for _, event in ipairs(frame) do
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if event.usage == evdev.REL_HWHEEL or event.usage == evdev.REL_HWHEEL_HI_RES then
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event.value = -event.value
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end
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end
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return frame
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end)
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end
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end)
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