`class XTerm`

Represents an XTerm-compatible output handler with color and style support.

Definitions

`COLORS = {...}`

Color codes for ANSI terminal colors.

Implementation

COLORS = {
	black: 0,
	red: 1,
	green: 2,
	yellow: 3,
	blue: 4,
	magenta: 5,
	cyan: 6,
	white: 7,
	default: 9,
}

`ATTRIBUTES = {...}`

Style attribute codes for ANSI terminal attributes.

Implementation

ATTRIBUTES = {
	normal: 0,
	bold: 1,
	bright: 1,
	faint: 2,
	italic: 3,
	underline: 4,
	blink: 5,
	reverse: 7,
	hidden: 8,
}

`def colors?`

Signature

returns　Boolean: Always returns true, as XTerm output supports colors.

Implementation

def colors?
	true
end

`def size`

Signature

returns　Array(Integer): The terminal size [height, width].

Implementation

def size
	@io.winsize
end

`def style(foreground, background = nil, *attributes)`

Create an ANSI escape sequence for styling.

Signature

parameter　foreground　Symbol, nil: The foreground color name.
parameter　background　Symbol, nil: The background color name.
parameter　attributes　Array: Additional style attributes.
returns　String: An ANSI escape sequence.

Implementation

def style(foreground, background = nil, *attributes)
	tokens = []
	
	if foreground
		tokens << 30 + COLORS.fetch(foreground)
	end
	
	if background
		tokens << 40 + COLORS.fetch(background)
	end
	
	attributes.each do |attribute|
		tokens << ATTRIBUTES.fetch(attribute){attribute.to_i}
	end
	
	return "\e[#{tokens.join(';')}m"
end

`def reset`

Signature

returns　String: The ANSI reset sequence.

Implementation

def reset
	"\e[0m"
end