Module: CLI::UI::Terminal

Defined in:
lib/cli/ui/terminal.rb

Constant Summary collapse

DEFAULT_WIDTH = 
80
DEFAULT_HEIGHT = 
24

Class Method Summary collapse

Class Method Details

.height ⇒ Object

Returns the width of the terminal, if possible Otherwise, will return DEFAULT_HEIGHT

: -> Integer



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# File 'lib/cli/ui/terminal.rb', line 25

def height
  winsize[0]
end

.setup_winsize_trap ⇒ Object

: -> void



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# File 'lib/cli/ui/terminal.rb', line 46

def setup_winsize_trap
  @winsize_trap ||= Signal.trap('WINCH') do
    @winsize = nil
  end
end

.width ⇒ Object

Returns the width of the terminal, if possible Otherwise will return DEFAULT_WIDTH

: -> Integer



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# File 'lib/cli/ui/terminal.rb', line 17

def width
  winsize[1]
end

.winsize ⇒ Object

: -> [Integer, Integer]



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# File 'lib/cli/ui/terminal.rb', line 30

def winsize
  @winsize ||= begin
    winsize = IO.console.winsize
    setup_winsize_trap

    if winsize.any?(&:zero?)
      [DEFAULT_HEIGHT, DEFAULT_WIDTH]
    else
      winsize
    end
  rescue
    [DEFAULT_HEIGHT, DEFAULT_WIDTH]
  end
end