https://github.com/muniftanjim/lua-evdev

LuaJIT FFI Bindings for libevdev.
https://github.com/muniftanjim/lua-evdev

evdev ffi libevdev luajit

Last synced: about 2 months ago
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LuaJIT FFI Bindings for libevdev.

• Host: GitHub
• URL: https://github.com/muniftanjim/lua-evdev
• Owner: MunifTanjim
• License: mit
• Created: 2021-12-25T17:59:19.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-08-27T12:49:40.000Z (over 2 years ago)
• Last Synced: 2024-10-11T08:19:11.192Z (2 months ago)
• Topics: evdev, ffi, libevdev, luajit
• Language: Lua
• Homepage: https://luarocks.org/modules/MunifTanjim/lua-evdev
• Size: 53.7 KB
• Stars: 3
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# lua-evdev

LuaJIT FFI Bindings for [`libevdev`](https://gitlab.freedesktop.org/libevdev/libevdev).

## Usage

### Initializing a Device

```lua

local Device = require("evdev.device")

---@param dev Device

local function print_device(dev)

  local name = dev:name():gsub("\n", " | ")

  print("============", "===")

  print("=     Name: ", name)

  print("=     Phys: ", dev:phys())

  print("=     Uniq: ", dev:uniq())

  print("=  Product: ", dev:product_id())

  print("=   Vendor: ", dev:vendor_id())

  print("=  Bustype: ", dev:bustype())

  print("=  Version: ", dev:version())

  print("============", "===")

end

local dev = Device:new("/dev/input/event7")

print_device(dev)

```

### Reading Events from a Device

```lua

local Event = require("evdev.event")

local Device = require("evdev.device")

local libevdev = require("evdev.libevdev")

local input = require("evdev.linux.input")

local enum = libevdev.enum

local input_constant = input.constant

---@param ev Event

local function print_event(ev)

  print(string.format("{'%s', '%s', %d};", ev:type_name(), ev:code_name(), ev:value()))

end

---@param dev Device

---@param initial_state table

local function events(dev, initial_state)

  initial_state = initial_state or {}

  if not initial_state.read_flag then

    initial_state.read_flag = initial_state.read_flag or enum.libevdev_read_flag.NORMAL

  end

  if not initial_state.should_skip then

    initial_state.should_skip = function()

      return false

    end

  end

  ---@return Event

  local function iter(state)

    local rc, ev = 0, Event:new()

    repeat

      rc, ev = dev:next_event(state.read_flag, ev)

      if (rc == enum.libevdev_read_status.SUCCESS) or (rc == enum.libevdev_read_status.SYNC) then

        if not state.should_skip(ev) then

          return ev, state

        end

      end

    until rc ~= enum.libevdev_read_status.SUCCESS and rc ~= enum.libevdev_read_status.SYNC and rc ~= -11

    return nil, state

  end

  return iter, initial_state

end

local dev = Device:new("/dev/input/event7")

local initial_state = {

  ---@param ev Event

  should_skip = function(ev)

    ev:is_type(input_constant.EV_KEY)

  end,

}

for ev in events(dev, initial_state) do

  print_event(ev)

end

```

### Initializing a UInputDevice

```lua

local Device = require("evdev.device")

local UIDevice = require("evdev.uinput-device")

---@param uidev UInputDevice

local function print_uinput_device(uidev)

  print("============", "===")

  print("=       FD: ", uidev:fd())

  print("=  SysPath: ", uidev:syspath())

  print("=  DevNode: ", uidev:devnode())

  print("============", "===")

end

local dev = Device:new("/dev/input/event7")

local uidev = UIDevice:new(dev)

print_uinput_device(uidev)

```

## License

Licensed under the MIT License. Check the [LICENSE](./LICENSE) file for details.