Class: Fusuma::LibinputCommand

Inherits:
Object
  • Object
show all
Defined in:
lib/fusuma/libinput_command.rb

Overview

Execute libinput command

Constant Summary collapse

NEW_CLI_OPTION_VERSION =

libinput-list-devices and libinput-debug-events are deprecated, use ‘libinput list-devices` and `libinput debug-events` from 1.8.

1.8
DEFAULT_WAIT_TIME = 
0.3
TIMEOUT_MESSAGE = 
'LIBINPUT TIMEOUT'

Instance Method Summary collapse

Constructor Details

#initialize(libinput_options: [], commands: {}) ⇒ LibinputCommand

Returns a new instance of LibinputCommand.



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# File 'lib/fusuma/libinput_command.rb', line 8

def initialize(libinput_options: [], commands: {})
  @debug_events_command = commands[:debug_events_command]
  @list_devices_command = commands[:list_devices_command]
  @libinput_options = libinput_options
end

Instance Method Details

#debug_events ⇒ Integer, IO

Return a latest line libinput debug-events

Returns:

  • (Integer, IO) —

    return a latest line libinput debug-events



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# File 'lib/fusuma/libinput_command.rb', line 45

def debug_events
  @debug_events = begin
    p, i, o, _e = POSIX::Spawn.popen4(debug_events_with_options)
    i.close
    [p, o]
  end
end

#debug_events_command ⇒ Object 



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# File 'lib/fusuma/libinput_command.rb', line 78

def debug_events_command
  if @debug_events_command
    @debug_events_command
  elsif new_cli_option_available?
    'libinput debug-events'
  else
    'libinput-debug-events'
  end
end

#debug_events_with_options ⇒ Object 



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# File 'lib/fusuma/libinput_command.rb', line 88

def debug_events_with_options
  prefix = 'stdbuf -oL --'
  "#{prefix} #{debug_events_command} #{@libinput_options.join(' ')}".strip
end

#list_devices {|gives| ... } ⇒ Object

Yield Parameters:

  • gives (String) —

    a line in libinput list-devices output to the block



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# File 'lib/fusuma/libinput_command.rb', line 33

def list_devices(&block)
  cmd = list_devices_command
  MultiLogger.debug(list_devices: cmd)
  p, i, o, e = POSIX::Spawn.popen4(cmd)
  i.close
  o.each(&block)
ensure
  [i, o, e].each { |io| io.close unless io.closed? }
  Process.waitpid(p)
end

#list_devices_command ⇒ Object 



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# File 'lib/fusuma/libinput_command.rb', line 68

def list_devices_command
  if @list_devices_command
    @list_devices_command
  elsif new_cli_option_available?
    'libinput list-devices'
  else
    'libinput-list-devices'
  end
end

#new_cli_option_available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fusuma/libinput_command.rb', line 22

def new_cli_option_available?
  Gem::Version.new(version) >= Gem::Version.new(NEW_CLI_OPTION_VERSION)
end

#version ⇒ String

Returns:



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# File 'lib/fusuma/libinput_command.rb', line 27

def version
  # versiom_command prints "1.6.3\n"
  @version ||= `#{version_command}`.strip
end

#version_command ⇒ String

Returns command.

Returns:

Raises:

  • (SystemExit) 


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# File 'lib/fusuma/libinput_command.rb', line 55

def version_command
  if @debug_events_command && @list_devices_command
    "#{@list_devices_command} --version"
  elsif which('libinput')
    'libinput --version'
  elsif which('libinput-list-devices')
    'libinput-list-devices --version'
  else
    MultiLogger.error 'Please install libinput-tools'
    exit 1
  end
end