Class: ANSI

Inherits:
Object show all
Defined in:
lib/selecta.rb

Constant Summary collapse

ESC = 
27.chr

Class Method Summary collapse

Class Method Details

.clear ⇒ Object 



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# File 'lib/selecta.rb', line 703

def clear
  escape "2J"
end

.clear_line ⇒ Object 



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# File 'lib/selecta.rb', line 719

def clear_line
  escape "2K"
end

.color(fg, bg = :default) ⇒ Object 



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# File 'lib/selecta.rb', line 723

def color(fg, bg=:default)
  fg_codes = {
    :black => 30,
    :red => 31,
    :green => 32,
    :yellow => 33,
    :blue => 34,
    :magenta => 35,
    :cyan => 36,
    :white => 37,
    :default => 39,
  }
  bg_codes = {
    :black => 40,
    :red => 41,
    :green => 42,
    :yellow => 43,
    :blue => 44,
    :magenta => 45,
    :cyan => 46,
    :white => 47,
    :default => 49,
  }
  fg_code = fg_codes.fetch(fg)
  bg_code = bg_codes.fetch(bg)
  escape "#{fg_code};#{bg_code}m"
end

.cursor_up(lines) ⇒ Object 



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# File 'lib/selecta.rb', line 715

def cursor_up(lines)
  escape "#{lines}A"
end

.escape(sequence) ⇒ Object 



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# File 'lib/selecta.rb', line 699

def escape(sequence)
  ESC + "[" + sequence
end

.hide_cursor ⇒ Object 



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# File 'lib/selecta.rb', line 707

def hide_cursor
  escape "?25l"
end

.inverse ⇒ Object 



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# File 'lib/selecta.rb', line 751

def inverse
  escape("7m")
end

.reset ⇒ Object 



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# File 'lib/selecta.rb', line 755

def reset
  escape("0m")
end

.show_cursor ⇒ Object 



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# File 'lib/selecta.rb', line 711

def show_cursor
  escape "?25h"
end