Class: Rkremap::Evdev

Inherits:
Object
  • Object
show all
Defined in:
lib/rkremap/evdev.rb

Overview

www.kernel.org/doc/html/v4.12/input/input_uapi.html

Constant Summary collapse

EVIOCGBIT_ANY =

EVIOCGBIT(0, 1)

2147566880
EVIOCGBIT_EV_KEY =

EVIOCGBIT(EV_KEY, (KEY_CNT-1)/8+1)

2153792801
EVIOCGRAB = 
1074021776
EVIOCGNAME =

EVIOCGNAME(256)

2164278534

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Evdev

Returns a new instance of Evdev.

Parameters:

  • path (String) 


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# File 'lib/rkremap/evdev.rb', line 13

def initialize(path)
  @path = path
  @io = nil
  @capa = nil
  @uinput = nil
  @grab = false
  io
end

Instance Attribute Details

#path ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/rkremap/evdev.rb', line 10

def path
  @path
end

Instance Method Details

#capable?(key) ⇒ Boolean

Parameters:

  • key (Integer)

Returns:

  • (Boolean) 


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# File 'lib/rkremap/evdev.rb', line 50

def capable?(key)
  unless @capa
    buf = ' ' * ((KeyCode::KEY_MAX-1)/8+1)
    io.ioctl(EVIOCGBIT_EV_KEY, buf)
    @capa = buf.unpack('C*')
  end
  @capa[key/8][key%8] != 0
end

#close ⇒ Object 



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# File 'lib/rkremap/evdev.rb', line 44

def close
  @io&.close
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rkremap/evdev.rb', line 26

def eql?(other)
  other.is_a?(Evdev) && self.path == other.path
end

#grab ⇒ Object 



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# File 'lib/rkremap/evdev.rb', line 84

def grab
  io.ioctl(EVIOCGRAB, 1)
  @grab = true
end

#grab? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rkremap/evdev.rb', line 90

def grab?
  @grab
end

#inspect ⇒ Object 



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# File 'lib/rkremap/evdev.rb', line 22

def inspect
  "#<Rkremap::Evdev: #{name} (#{path})>"
end

#io ⇒ IO

Returns:

  • (IO) 


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# File 'lib/rkremap/evdev.rb', line 31

def io
  return @io if @io
  @io = File.open(@path)
end

#keyboard? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rkremap/evdev.rb', line 60

def keyboard?
  return @is_keyboard unless @is_keyboard.nil?
  @is_keyboard = false
  return false if name =~ /\Arkremap\0*\z/

  buf = +''
  io.ioctl(EVIOCGBIT_ANY, buf)
  return false if buf.unpack1('C')[EV_KEY] == 0
  @is_keyboard = capable?(KeyCode::KEY_0) && capable?(KeyCode::KEY_9) &&
                 capable?(KeyCode::KEY_A) && capable?(KeyCode::KEY_Z) && capable?(KeyCode::KEY_SPACE)
end

#match?(pattern) ⇒ Boolean

Parameters:

  • pattern (Symbol, Regexp)

Returns:

  • (Boolean) 


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# File 'lib/rkremap/evdev.rb', line 109

def match?(pattern)
  return true if pattern == true
  return true if pattern == :keyboard && keyboard?
  return true if pattern == :mouse && mouse?
  return true if pattern.is_a?(Regexp) && pattern =~ name
  return false
end

#mouse? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rkremap/evdev.rb', line 73

def mouse?
  return @is_mouse unless @is_mouse.nil?
  @is_mouse = false
  return false if name =~ /\Arkremap\0*\z/

  buf = +''
  io.ioctl(EVIOCGBIT_ANY, buf)
  return false if buf.unpack1('C')[EV_KEY] == 0
  @is_mouse = capable?(KeyCode::BTN_MOUSE)
end

#name ⇒ String

Returns:

  • (String) 


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# File 'lib/rkremap/evdev.rb', line 37

def name
  return @name if @name
  buf = +''
  io.ioctl(EVIOCGNAME, buf)
  @name = buf.sub(/\0+$/, '')
end

#read_event ⇒ Rkremap::Event

struct input_event 

struct timeval time;
unsigned short type;
unsigned short code;
unsigned int value;

;

Returns:



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# File 'lib/rkremap/evdev.rb', line 101

def read_event
  raw = io.sysread(24)  # sizeof(struct input_event)
  sec, usec, type, code, value = raw.unpack('Q!Q!SSl')
  time = Time.at(sec, usec)
  Event.new(self, time, type, code, value)
end