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# frozen_string_literal: true
# Redmine - project management software
# Copyright (C) 2006- Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
module Redmine
module CodesetUtil
def self.replace_invalid_utf8(str)
return nil if str.nil?
str = str.dup
str.force_encoding('UTF-8')
unless str.valid_encoding?
str = str.encode("UTF-16LE", :invalid => :replace,
:undef => :replace, :replace => '?').encode("UTF-8")
end
str
end
def self.to_utf8(str, encoding)
return if str.nil?
str = str.b
if str.empty?
str.force_encoding("UTF-8")
return str
end
enc = encoding.blank? ? "UTF-8" : encoding
if enc.casecmp("UTF-8") != 0
str.force_encoding(enc)
str = str.encode("UTF-8", :invalid => :replace,
:undef => :replace, :replace => '?')
else
str = replace_invalid_utf8(str)
end
str
end
def self.to_utf8_by_setting(str)
return if str.nil?
str = str.dup
self.to_utf8_by_setting_internal(str).force_encoding('UTF-8')
end
def self.to_utf8_by_setting_internal(str)
return if str.nil?
str = str.b
return str if str.empty?
return str if /\A[\r\n\t\x20-\x7e]*\Z/n.match?(str) # for us-ascii
str.force_encoding('UTF-8')
encodings = Setting.repositories_encodings.split(',').collect(&:strip)
encodings.each do |encoding|
begin
str.force_encoding(encoding)
utf8 = str.encode('UTF-8')
return utf8 if utf8.valid_encoding?
rescue
# do nothing here and try the next encoding
end
end
self.replace_invalid_utf8(str).force_encoding('UTF-8')
end
def self.from_utf8(str, encoding)
return if str.nil?
str = str.dup
str ||= ''
str.force_encoding('UTF-8')
if encoding.casecmp('UTF-8') != 0
str = str.encode(encoding, :invalid => :replace,
:undef => :replace, :replace => '?')
else
str = self.replace_invalid_utf8(str)
end
end
def self.guess_encoding(str)
return if str.nil?
str = str.dup
encodings = Setting.repositories_encodings.split(',').collect(&:strip)
encodings = encodings.presence || ['UTF-8']
encodings.each do |encoding|
begin
str.force_encoding(encoding)
rescue Encoding::ConverterNotFoundError
# ignore if the encoding name is invalid
end
return encoding if str.valid_encoding?
end
nil
end
end
end
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