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Contents
# encoding: UTF-8
# Copyright 2012 Twitter, Inc
# http://www.apache.org/licenses/LICENSE-2.0
module TwitterCldr
module Transforms
module Filters
class UnicodeFilter < FilterRule
class << self
def parse(rule_text, symbol_table)
rule_text = Rule.remove_comment(rule_text).strip
rule_text = rule_text[2..-2].strip if rule_text.start_with?('::')
direction = direction_for(rule_text)
re = TwitterCldr::Shared::UnicodeRegex.compile(
clean_rule(rule_text, direction)
)
# filters are always just a unicode set
new(re.elements.first.to_set.to_set, direction)
end
def accepts?(rule_text)
!!(rule_text =~ /\A::[\s]*\(?[\s]*\[/)
end
private
def direction_for(rule_text)
if rule_text.start_with?('(')
:backward
else
:forward
end
end
def clean_rule(rule_text, direction)
if direction == :backward
rule_text[1..-2].strip
else
rule_text
end
end
end
attr_reader :charset, :direction
def initialize(charset, direction)
@charset = charset
@direction = direction
end
def resolve(symbol_table)
self
end
def matches?(cursor)
charset.include?(cursor.text[cursor.position].ord)
end
def forward?
direction == :forward
end
def backward?
direction == :backward
end
end
end
end
end
Version data entries
28 entries across 28 versions & 1 rubygems