Module: Cursor

Extended by:
Cursor
Included in:
Cursor
Defined in:
lib/drydock/console.rb

Overview

:nodoc:all

Instance Method Summary collapse

Instance Method Details

#clear_line ⇒ Object 



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# File 'lib/drydock/console.rb', line 193

def clear_line
  tput :el
end

#down(n = 1) ⇒ Object 



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# File 'lib/drydock/console.rb', line 169

def down(n=1)
  tput :cud, n
end

#left(x = 1) ⇒ Object 



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# File 'lib/drydock/console.rb', line 177

def left(x=1)
  tput :cub, x
end

#line(n = 1) ⇒ Object 



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# File 'lib/drydock/console.rb', line 181

def line(n=1)
  tput :il, n
end

#move=(*args) ⇒ Object 



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# File 'lib/drydock/console.rb', line 160

def move=(*args)
  x,y = *args.flatten
  tput(:cup, y, x) # "tput cup" takes y before x
end

#position ⇒ Object

Returns [x,y] for the current cursor position.



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# File 'lib/drydock/console.rb', line 131

def position
  yx = [0,0]
  
  position_lamb = lambda {
    begin
      # NOTE: Can we get cursor position from tput?
      termsettings = `stty -g`
    
      # DEBUGGING: The following code works in Ruby 1.9 but not 1.8.
    
      system("stty raw -echo")
      print "\e[6n"  # Forces output of: \e[49;1R  (\e is not printable)
      c = ''
      (pos ||= '') << c while (c = STDIN.getc) != 'R'# NOTE: There must be a better way!
      yx = pos.scan(/(\d+);(\d+)/).flatten
      yx[0] = yx[0].to_i - 1  # It returns 1 for the first column, but we want 0
      yx[1] = yx[1].to_i - 1
    ensure
      system("stty #{termsettings}") # Get out of raw mode
    end
  }
  
  RUBY_VERSION =~ /1.9/ ? Thread.exclusive(&position_lamb) : position_lamb.call
  yx.reverse
end

#restore ⇒ Object 



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# File 'lib/drydock/console.rb', line 189

def restore
  tput :rc
end

#right(x = 1) ⇒ Object 



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# File 'lib/drydock/console.rb', line 173

def right(x=1)
  tput :cuf, x
end

#save ⇒ Object 



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# File 'lib/drydock/console.rb', line 185

def save
  tput :sc
end

#up(n = 1) ⇒ Object 



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# File 'lib/drydock/console.rb', line 165

def up(n=1)
  tput :cuu, n
end

#x ⇒ Object 



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# File 'lib/drydock/console.rb', line 157

def x; position[0]; end

#y ⇒ Object 



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# File 'lib/drydock/console.rb', line 158

def y; position[1]; end