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executable file 151 lines (134 sloc) 5.31 kb
#!/usr/bin/env ruby
begin
$:.unshift(File.expand_path(File.dirname(__FILE__) + '/../lib'))
require 'active_support'
rescue IOError
end
require 'open-uri'
require 'tmpdir'
module ActiveSupport
module Multibyte
module Unicode
class UnicodeDatabase
def load; end
end
class DatabaseGenerator
BASE_URI = "http://www.unicode.org/Public/#{UNICODE_VERSION}/ucd/"
SOURCES = {
:codepoints => BASE_URI + 'UnicodeData.txt',
:composition_exclusion => BASE_URI + 'CompositionExclusions.txt',
:grapheme_break_property => BASE_URI + 'auxiliary/GraphemeBreakProperty.txt',
:cp1252 => 'http://unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT'
}
def initialize
@ucd = Unicode::UnicodeDatabase.new
default = Codepoint.new
default.combining_class = 0
default.uppercase_mapping = 0
default.lowercase_mapping = 0
@ucd.codepoints = Hash.new(default)
end
def parse_codepoints(line)
codepoint = Codepoint.new
raise "Could not parse input." unless line =~ /^
([0-9A-F]+); # code
([^;]+); # name
([A-Z]+); # general category
([0-9]+); # canonical combining class
([A-Z]+); # bidi class
(<([A-Z]*)>)? # decomposition type
((\ ?[0-9A-F]+)*); # decomposition mapping
([0-9]*); # decimal digit
([0-9]*); # digit
([^;]*); # numeric
([YN]*); # bidi mirrored
([^;]*); # unicode 1.0 name
([^;]*); # iso comment
([0-9A-F]*); # simple uppercase mapping
([0-9A-F]*); # simple lowercase mapping
([0-9A-F]*)$/ix # simple titlecase mapping
codepoint.code = $1.hex
#codepoint.name = $2
#codepoint.category = $3
codepoint.combining_class = Integer($4)
#codepoint.bidi_class = $5
codepoint.decomp_type = $7
codepoint.decomp_mapping = ($8=='') ? nil : $8.split.collect { |element| element.hex }
#codepoint.bidi_mirrored = ($13=='Y') ? true : false
codepoint.uppercase_mapping = ($16=='') ? 0 : $16.hex
codepoint.lowercase_mapping = ($17=='') ? 0 : $17.hex
#codepoint.titlecase_mapping = ($18=='') ? nil : $18.hex
@ucd.codepoints[codepoint.code] = codepoint
end
def parse_grapheme_break_property(line)
if line =~ /^([0-9A-F.]+)\s*;\s*([\w]+)\s*#/
type = $2.downcase.intern
@ucd.boundary[type] ||= []
if $1.include? '..'
parts = $1.split '..'
@ucd.boundary[type] << (parts[0].hex..parts[1].hex)
else
@ucd.boundary[type] << $1.hex
end
end
end
def parse_composition_exclusion(line)
if line =~ /^([0-9A-F]+)/i
@ucd.composition_exclusion << $1.hex
end
end
def parse_cp1252(line)
if line =~ /^([0-9A-Fx]+)\s([0-9A-Fx]+)/i
@ucd.cp1252[$1.hex] = $2.hex
end
end
def create_composition_map
@ucd.codepoints.each do |_, cp|
if !cp.nil? and cp.combining_class == 0 and cp.decomp_type.nil? and !cp.decomp_mapping.nil? and cp.decomp_mapping.length == 2 and @ucd.codepoints[cp.decomp_mapping[0]].combining_class == 0 and !@ucd.composition_exclusion.include?(cp.code)
@ucd.composition_map[cp.decomp_mapping[0]] ||= {}
@ucd.composition_map[cp.decomp_mapping[0]][cp.decomp_mapping[1]] = cp.code
end
end
end
def normalize_boundary_map
@ucd.boundary.each do |k,v|
if [:lf, :cr].include? k
@ucd.boundary[k] = v[0]
end
end
end
def parse
SOURCES.each do |type, url|
filename = File.join(Dir.tmpdir, "#{url.split('/').last}")
unless File.exist?(filename)
$stderr.puts "Downloading #{url.split('/').last}"
File.open(filename, 'wb') do |target|
open(url) do |source|
source.each_line { |line| target.write line }
end
end
end
File.open(filename) do |file|
file.each_line { |line| send "parse_#{type}".intern, line }
end
end
create_composition_map
normalize_boundary_map
end
def dump_to(filename)
File.open(filename, 'wb') do |f|
f.write Marshal.dump([@ucd.codepoints, @ucd.composition_exclusion, @ucd.composition_map, @ucd.boundary, @ucd.cp1252])
end
end
end
end
end
end
if __FILE__ == $0
filename = ActiveSupport::Multibyte::Unicode::UnicodeDatabase.filename
generator = ActiveSupport::Multibyte::Unicode::DatabaseGenerator.new
generator.parse
print "Writing to: #{filename}"
generator.dump_to filename
puts " (#{File.size(filename)} bytes)"
end
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