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# -*- encoding: utf-8 -*-
require "unicode_utils/char_name"
module UnicodeUtils
# A Codepoint instance represents a single Unicode code point.
#
# UnicodeUtils::Codepoint.new(0x20ac) => #<U+20AC "€" EURO SIGN utf8:e2,82,ac>
class Codepoint
# The Unicode codespace. Any integer in this range is a Unicode
# code point.
RANGE = 0..0x10FFFF
# Create a Codepoint instance that wraps the given Integer. +int+
# must be in Codepoint::RANGE.
def initialize(int)
unless RANGE.include?(int)
raise ArgumentError, "#{int} not in codespace"
end
@int = int
end
# Convert to Integer.
def ord
@int
end
# Format in U+ notation.
#
# Codepoint.new(0xc5).uplus => "U+00C5"
def uplus
sprintf('U+%04X', @int)
end
# Get the normative Unicode name of this code point.
#
# See also: UnicodeUtils.char_name
def name
UnicodeUtils.char_name(@int)
end
# Convert this code point to an UTF-8 encoded string. Returns a new
# string on each call and thus it is allowed to mutate the return
# value.
def to_s
@int.chr(Encoding::UTF_8)
end
# Get the bytes used to encode this code point in UTF-8,
# hex-formatted.
#
# Codepoint.new(0xe4).hexbytes => "c3,a4"
def hexbytes
to_s.bytes.map { |b| sprintf("%02x", b) }.join(",")
end
# #<U+... char name utf8-hexbytes>
def inspect
"#<#{uplus} #{to_s.inspect} #{name || "nil"} utf8:#{hexbytes}>"
end
end
end
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