Class: Tui::Terminal

Inherits:

Object

• Object
• Tui::Terminal

Defined in:

lib/tui.rb

Class Method Summary

• .size(io = $stderr) ⇒ Object

Class Method Details

.size(io = $stderr) ⇒ Object

# File 'lib/tui.rb', line 300

def size(io = $stderr)
  env_rows = ENV['TRY_HEIGHT'].to_i
  env_cols = ENV['TRY_WIDTH'].to_i
  rows = env_rows.positive? ? env_rows : nil
  cols = env_cols.positive? ? env_cols : nil

  streams = [io, $stdout, $stdin].compact.uniq

  streams.each do |stream|
    next unless (!rows || !cols)
    next unless stream.respond_to?(:winsize)

    begin
      s_rows, s_cols = stream.winsize
      rows ||= s_rows
      cols ||= s_cols
    rescue IOError, Errno::ENOTTY, Errno::EOPNOTSUPP, Errno::ENODEV
      next
    end
  end

  if (!rows || !cols)
    begin
      console = IO.console
      if console
        c_rows, c_cols = console.winsize
        rows ||= c_rows
        cols ||= c_cols
      end
    rescue IOError, Errno::ENOTTY, Errno::EOPNOTSUPP, Errno::ENODEV
    end
  end

  rows ||= 24
  cols ||= 80
  [rows, cols]
end