Sha256: af374bb78913d50e3a3ee5173899b5ae75409cd72d34592655f9ac430eb98420
Contents?: true
Size: 1.75 KB
Versions: 9
Compression:
Stored size: 1.75 KB
Contents
# encoding: utf-8
module Unicode; end
module Unicode::DisplayWidth
VERSION = '0.1.1'
end
class << Unicode::DisplayWidth
DATA_DIR = File.join(File.dirname(__FILE__), '../../data/')
TABLE_FILE = DATA_DIR + 'EastAsianWidth.index'
DATA_FILE = DATA_DIR + 'EastAsianWidth.txt'
# only needed for building the index
def data
@data ||= File.open DATA_FILE
end
def table
if @table
@table
else
build_table unless File.file?(TABLE_FILE)
@table = Marshal.load File.respond_to?(:binread) ? File.binread(TABLE_FILE) : File.read(TABLE_FILE)
end
end
def codepoint(n)
n = n.to_s.unpack('U')[0] unless n.is_a? Integer
table[n] or raise ArgumentError
end
alias width codepoint
alias of codepoint
def build_table
data.rewind
table = {}
dir = File.dirname TABLE_FILE
Dir.mkdir(dir) unless Dir.exists?(dir)
data.lines.each{ |line|
line =~ /^(.*);(.*) # .*$/
if $1 && $2
cps, width = $1, $2
if cps['..']
range = Range.new *cps.split('..').map{ |cp| cp.to_i(16) }
range.each{ |cp| table[ cp ] = width.to_sym }
else
table[ cps.to_i(16) ] = width.to_sym
end
end
}
File.open(TABLE_FILE, 'wb') { |f| Marshal.dump(table, f) }
end
end
class String
def display_width(ambiguous = 1)
#codepoints.inject(0){ |a,c|
unpack('U*').inject(0){ |a,c|
width = case Unicode::DisplayWidth.codepoint(c).to_s
when *%w[F W]
2
when *%w[N Na H]
1
when *%w[A] # TODO
ambiguous
else
1
end
a + width
}
end
alias display_size display_width
alias display_length display_width
end
# J-_-L
Version data entries
9 entries across 8 versions & 2 rubygems