Class: Async::Terminal

Inherits:
Object
  • Object
show all
Defined in:
lib/async/terminal.rb

Overview

Styled terminal output. Internal Use Only

Defined Under Namespace

Modules: Attributes, Colors

Instance Method Summary collapse

Constructor Details

#initialize(output) ⇒ Terminal

Returns a new instance of Terminal.



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# File 'lib/async/terminal.rb', line 47

def initialize(output)
  @output = output
end

Instance Method Details

#color(foreground, background = nil, attributes = nil) ⇒ Object 



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# File 'lib/async/terminal.rb', line 55

def color(foreground, background = nil, attributes = nil)
  return nil unless tty?
  
  buffer = String.new
  
  buffer << "\e["
  first = true
  
  if attributes
    buffer << (attributes).to_s
    first = false
  end
  
  if foreground
    if !first
      buffer << ";" 
    else
      first = false
    end
    
    buffer << (30 + foreground).to_s
  end
  
  if background
    if !first
      buffer << ";" 
    else
      first = false
    end
    
    buffer << (40 + background).to_s
  end
  
  buffer << 'm'
  
  return buffer
end

#reset ⇒ Object 



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# File 'lib/async/terminal.rb', line 93

def reset
  return nil unless tty?
  
  return "\e[0m"
end

#tty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/terminal.rb', line 51

def tty?
  @output.isatty
end