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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 Transforms
class CasingTransform < TransformRule
VALID_FORMS = %w(lower upper title)
class << self
def accepts?(forward_form, backward_form)
valid_form?(forward_form) && valid_form?(backward_form)
end
private
def valid_form?(form)
!form || form.null? || form.blank? || (
VALID_FORMS.include?(form.transform.downcase)
)
end
end
attr_reader :forward_transform, :backward_transform
def apply_to(cursor)
if forward_transform
case forward_transform
when 'lower'
apply_lower(cursor)
when 'upper'
apply_upper(cursor)
when 'title'
apply_title(cursor)
end
cursor.reset_position
end
end
private
def after_initialize
@forward_transform = normalize_transform(forward_form)
@backward_transform = normalize_transform(backward_form)
end
def normalize_transform(form)
if form && form.has_transform?
form.transform.downcase
end
end
def apply_lower(cursor)
cursor.set_text(caser.downcase(cursor.text))
end
def apply_upper(cursor)
cursor.set_text(caser.upcase(cursor.text))
end
def apply_title(cursor)
cursor.set_text(caser.titlecase(cursor.text))
end
def caser
TwitterCldr::Shared::Caser
end
end
end
end
end
Version data entries
29 entries across 29 versions & 1 rubygems