Class: Fusuma::Plugin::Remap::KeyboardRemapper

Inherits:
Object
  • Object
show all
Includes:
Revdev
Defined in:
lib/fusuma/plugin/remap/keyboard_remapper.rb

Defined Under Namespace

Classes: KeyboardSelector, TouchpadSelector

Constant Summary collapse

VIRTUAL_KEYBOARD_NAME = 
"fusuma_virtual_keyboard"
DEFAULT_EMERGENCY_KEYBIND = 
"RIGHTCTRL+LEFTCTRL".freeze
KEYMAP =

Key conversion tables for better performance and readability

Revdev.constants.select { |c| c.start_with?("KEY_", "BTN_") }
.map { |c| [Revdev.const_get(c), c.to_s.delete_prefix("KEY_")] }
.to_h.freeze
CODEMAP = 
Revdev.constants.select { |c| c.start_with?("KEY_", "BTN_") }
.map { |c| [c, Revdev.const_get(c)] }
.to_h.freeze

Instance Method Summary collapse

Constructor Details

#initialize(layer_manager:, fusuma_writer:, config: {}) ⇒ KeyboardRemapper

Returns a new instance of KeyboardRemapper.

Parameters:



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# File 'lib/fusuma/plugin/remap/keyboard_remapper.rb', line 28

def initialize(layer_manager:, fusuma_writer:, config: {})
  @layer_manager = layer_manager # request to change layer
  @fusuma_writer = fusuma_writer # write event to original keyboard
  @config = config
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/fusuma/plugin/remap/keyboard_remapper.rb', line 34

def run
  create_virtual_keyboard
  @source_keyboards = reload_keyboards

  old_ie = nil
  layer = nil
  next_mapping = nil
  current_mapping = {}

  loop do
    ios = IO.select([*@source_keyboards.map(&:file), @layer_manager.reader])
    io = ios.first.first

    if io == @layer_manager.reader
      layer = @layer_manager.receive_layer # update @current_layer
      if layer.nil?
        next
      end

      next_mapping = @layer_manager.find_mapping(layer)
      next
    end

    if next_mapping && virtual_keyboard_all_key_released?
      if current_mapping != next_mapping
        current_mapping = next_mapping
      end
      next_mapping = nil
    end

    input_event = @source_keyboards.find { |kbd| kbd.file == io }.read_input_event
    input_key = code_to_key(input_event.code)

    if input_event.type == EV_KEY
      @emergency_stop.call(old_ie, input_event)

      old_ie = input_event
      if input_event.value != 2 # repeat
        data = {key: input_key, status: input_event.value, layer: layer}
        begin
          @fusuma_writer.write(data.to_msgpack)
        rescue IOError => e
          MultiLogger.error("Failed to write to fusuma_writer: #{e.message}")
          @destroy&.call(1)
          return
        end
      end
    end

    remapped = current_mapping.fetch(input_key.to_sym, nil)
    case remapped
    when String, Symbol
      # Remapped to another key - continue processing below
    when Hash
      # Command execution (e.g., {:SENDKEY=>"LEFTCTRL+BTN_LEFT", :CLEARMODIFIERS=>true})
      # Skip input event processing and let Fusuma's Executor handle this
      next
    when nil
      # Not remapped - write original key event as-is
      uinput_keyboard.write_input_event(input_event)
      next
    else
      # Invalid remapping configuration
      MultiLogger.warn("Invalid remapped value - type: #{remapped.class}, key: #{input_key}")
      next
    end

    remapped_code = key_to_code(remapped)
    if remapped_code.nil?
      MultiLogger.warn("Invalid remapped value - unknown key: #{remapped}, input: #{input_key}")
      uinput_keyboard.write_input_event(input_event)
      next
    end

    remapped_event = InputEvent.new(nil, input_event.type, remapped_code, input_event.value)

    # Workaround: If a key was pressed before remapping started and is being released,
    # use the original key code to ensure proper key release
    if should_use_original_key?(remapped, remapped_event.value)
      remapped_event.code = input_event.code
    else
      # Only update virtual key state if we're using the remapped key
      update_virtual_key_state(remapped, remapped_event.value)
    end

    # remap to command will be nil
    # e.g) remap: { X: { command: echo 'foo' } }
    # this is because the command will be executed by fusuma process
    next if remapped_event.code.nil?

    uinput_keyboard.write_input_event(remapped_event)
  rescue Errno::ENODEV => e # device is removed
    MultiLogger.error "Device is removed: #{e.message}"
    @source_keyboards = reload_keyboards
  end
rescue EOFError => e # device is closed
  MultiLogger.error "Device is closed: #{e.message}"
ensure
  @destroy&.call
end