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require_relative "basic"
require_relative "lcs_diff"
class Thor
module Shell
# Inherit from Thor::Shell::Basic and add set_color behavior. Check
# Thor::Shell::Basic to see all available methods.
#
class Color < Basic
include LCSDiff
# Embed in a String to clear all previous ANSI sequences.
CLEAR = "\e[0m"
# The start of an ANSI bold sequence.
BOLD = "\e[1m"
# Set the terminal's foreground ANSI color to black.
BLACK = "\e[30m"
# Set the terminal's foreground ANSI color to red.
RED = "\e[31m"
# Set the terminal's foreground ANSI color to green.
GREEN = "\e[32m"
# Set the terminal's foreground ANSI color to yellow.
YELLOW = "\e[33m"
# Set the terminal's foreground ANSI color to blue.
BLUE = "\e[34m"
# Set the terminal's foreground ANSI color to magenta.
MAGENTA = "\e[35m"
# Set the terminal's foreground ANSI color to cyan.
CYAN = "\e[36m"
# Set the terminal's foreground ANSI color to white.
WHITE = "\e[37m"
# Set the terminal's background ANSI color to black.
ON_BLACK = "\e[40m"
# Set the terminal's background ANSI color to red.
ON_RED = "\e[41m"
# Set the terminal's background ANSI color to green.
ON_GREEN = "\e[42m"
# Set the terminal's background ANSI color to yellow.
ON_YELLOW = "\e[43m"
# Set the terminal's background ANSI color to blue.
ON_BLUE = "\e[44m"
# Set the terminal's background ANSI color to magenta.
ON_MAGENTA = "\e[45m"
# Set the terminal's background ANSI color to cyan.
ON_CYAN = "\e[46m"
# Set the terminal's background ANSI color to white.
ON_WHITE = "\e[47m"
# Set color by using a string or one of the defined constants. If a third
# option is set to true, it also adds bold to the string. This is based
# on Highline implementation and it automatically appends CLEAR to the end
# of the returned String.
#
# Pass foreground, background and bold options to this method as
# symbols.
#
# Example:
#
# set_color "Hi!", :red, :on_white, :bold
#
# The available colors are:
#
# :bold
# :black
# :red
# :green
# :yellow
# :blue
# :magenta
# :cyan
# :white
# :on_black
# :on_red
# :on_green
# :on_yellow
# :on_blue
# :on_magenta
# :on_cyan
# :on_white
def set_color(string, *colors)
if colors.compact.empty? || !can_display_colors?
string
elsif colors.all? { |color| color.is_a?(Symbol) || color.is_a?(String) }
ansi_colors = colors.map { |color| lookup_color(color) }
"#{ansi_colors.join}#{string}#{CLEAR}"
else
# The old API was `set_color(color, bold=boolean)`. We
# continue to support the old API because you should never
# break old APIs unnecessarily :P
foreground, bold = colors
foreground = self.class.const_get(foreground.to_s.upcase) if foreground.is_a?(Symbol)
bold = bold ? BOLD : ""
"#{bold}#{foreground}#{string}#{CLEAR}"
end
end
protected
def can_display_colors?
are_colors_supported? && !are_colors_disabled?
end
def are_colors_supported?
stdout.tty? && ENV["TERM"] != "dumb"
end
def are_colors_disabled?
!ENV["NO_COLOR"].nil? && !ENV["NO_COLOR"].empty?
end
end
end
end
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