uim.rb

#!/usr/bin/env ruby

require 'fiddle/import'
require 'shellwords'

Libuim = `/sbin/ldconfig -p`.split(/[\r\n]/).map do |line|
  line.strip.split(/\s+/)[0]
end.find do |line|
  line =~ /\Alibuim[.]so[.][0-9]+\z/
end

module UIM
  extend Fiddle::Importer

  dlload Libuim

  extern 'int uim_helper_init_client_fd(void*)'
  extern 'void uim_helper_close_client_fd(int)'
  extern 'void uim_helper_send_message(int, char*)'

  def self.connect()
    Helper.new
  end

  def self.on()
    scheme_exp = %q{
      (or (and custom-activate-default-im-name? default-im-name)
          (and enable-im-toggle? toggle-im-alt-im)
          (car enabled-im-list))

    }
    im_name = %x{ uim-sh -e #{scheme_exp.shellescape} }
    puts im_name
    Helper.new.im_change_whole_desktop(im_name).close()
  end

  def self.off()
    Helper.new.im_change_whole_desktop('direct').close()
  end

  class Helper
    def initialize()
      @fd = UIM.uim_helper_init_client_fd(nil)
    end

    def close()
      UIM.uim_helper_close_client_fd(@fd)
      return self
    end

    def send_message(str)
      UIM.uim_helper_send_message(@fd, str)
      return self
    end

    def im_change_whole_desktop(im_name)
      send_message("im_change_whole_desktop\n#{im_name}\n")
      return self
    end
  end
end

case ARGV[0]
when 'on' then
  UIM.on()
when 'off' then
  UIM.off()
else
  puts("#{File.basename($0)} {on|off}")
end