module Reline::Terminfo

Public Class Methods

curses_dl() click to toggle source
# File lib/reline/terminfo.rb, line 24
def self.curses_dl
  return @curses_dl unless @curses_dl == false
  if RUBY_VERSION >= '3.0.0'
    # Gem module isn't defined in test-all of the Ruby repository, and
    # Fiddle in Ruby 3.0.0 or later supports Fiddle::TYPE_VARIADIC.
    fiddle_supports_variadic = true
  elsif Fiddle.const_defined?(:VERSION) and Gem::Version.create(Fiddle::VERSION) >= Gem::Version.create('1.0.1')
    # Fiddle::TYPE_VARIADIC is supported from Fiddle 1.0.1.
    fiddle_supports_variadic = true
  else
    fiddle_supports_variadic = false
  end
  if fiddle_supports_variadic and not Fiddle.const_defined?(:TYPE_VARIADIC)
    # If the libffi version is not 3.0.5 or higher, there isn't TYPE_VARIADIC.
    fiddle_supports_variadic = false
  end
  if fiddle_supports_variadic
    curses_dl_files.each do |curses_name|
      result = Fiddle::Handle.new(curses_name)
    rescue Fiddle::DLError
      next
    else
      @curses_dl = result
      break
    end
  end
  @curses_dl = nil if @curses_dl == false
  @curses_dl
end
curses_dl_files() click to toggle source
# File lib/reline/terminfo.rb, line 9
def self.curses_dl_files
  case RUBY_PLATFORM
  when /mingw/, /mswin/
    # aren't supported
    []
  when /cygwin/
    %w[cygncursesw-10.dll cygncurses-10.dll]
  when /darwin/
    %w[libncursesw.dylib libcursesw.dylib libncurses.dylib libcurses.dylib]
  else
    %w[libncursesw.so libcursesw.so libncurses.so libcurses.so]
  end
end
enabled?() click to toggle source
# File lib/reline/terminfo.rb, line 117
def self.enabled?
  true
end
setupterm(term, fildes) click to toggle source

TODO: add int tigetflag(char *capname) and int tigetnum(char *capname)

# File lib/reline/terminfo.rb, line 71
def self.setupterm(term, fildes)
  errret_int = String.new("\x00" * 8, encoding: 'ASCII-8BIT')
  ret = @setupterm.(term, fildes, errret_int)
  errret = errret_int.unpack('i')[0]
  case ret
  when 0 # OK
    0
  when -1 # ERR
    case errret
    when 1
      raise TerminfoError.new('The terminal is hardcopy, cannot be used for curses applications.')
    when 0
      raise TerminfoError.new('The terminal could not be found, or that it is a generic type, having too little information for curses applications to run.')
    when -1
      raise TerminfoError.new('The terminfo database could not be found.')
    else # unknown
      -1
    end
  else # unknown
    -2
  end
end
tigetstr(capname) click to toggle source
# File lib/reline/terminfo.rb, line 100
def self.tigetstr(capname)
  capability = @tigetstr.(capname)
  case capability.to_i
  when 0, -1
    raise TerminfoError, "can't find capability: #{capname}"
  end
  StringWithTiparm.new(capability.to_s)
end
tiparm(str, *args) click to toggle source
# File lib/reline/terminfo.rb, line 109
def self.tiparm(str, *args)
  new_args = []
  args.each do |a|
    new_args << Fiddle::TYPE_INT << a
  end
  @tiparm.(str, *new_args).to_s
end