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Contents
#--
# Author:: Tyler Rick
# Copyright:: Copyright (c) 2007 QualitySmith, Inc.
# License:: Ruby License
# Submit to Facets?:: Maybe
#++
module WithKnowledgeOfColor
Color_regexp = /\e\[[^m]+m/
def strip_color
gsub(Color_regexp, '')
end
# This version of +length+ takes into account the fact that the ANSI color codes themselves don't take up any space to display on the screen.
# So this returns the number of characters wide the string is when it is actually printed to the screen.
def length_without_color
strip_color.length
end
def nonprinting_characters_used_for_color
self.scan(Color_regexp).join
end
def ljust_without_color(width)
ljust(width + nonprinting_characters_used_for_color.length)
end
end
class String
include WithKnowledgeOfColor
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'rubygems'
gem 'colored'
require 'colored'
class TheTest < Test::Unit::TestCase
def test_strip_color
assert "abc" != "abc".blue
assert_equal "abc", "abc".blue.strip_color
end
def test_length_without_color
assert_equal 12, "abc".blue.length
assert_equal 3, "abc".blue.length_without_color
end
def test_nonprinting_characters_used_for_color
assert_equal "\e[34m\e[0m", 'abc'.blue.nonprinting_characters_used_for_color
end
def test_ljust_without_color
assert_equal "abc ", 'abc'. ljust( 5)
assert_equal "abc ", 'abc'.blue.ljust_without_color(5).strip_color
assert_equal "\e[34mabc\e[0m ", 'abc'.blue.ljust_without_color(5)
end
end
=end
Version data entries
14 entries across 14 versions & 2 rubygems