Module: JavaProperties::Encoding::Unicode

Defined in:
lib/java-properties/encoding/unicode.rb

Overview

Module to encode and decode unicode chars

See Also:

Constant Summary collapse

UNICODE_MARKER =

Marker for encoded unicode chars

Returns:

  • (Regexp) 
/\\[uU]([0-9a-fA-F]{4,5}|10[0-9a-fA-F]{4})/
UNICODE_ESCAPE =

Escape char for unicode chars

Returns:

  • (String) 
"\\u"

Class Method Summary collapse

Class Method Details

.decode!(text) ⇒ String

Decodes all unicode chars from escape sequences in place

Parameters:

  • text (String)

Returns:

  • (String) —

    The encoded text for chaining



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# File 'lib/java-properties/encoding/unicode.rb', line 18

def self.decode!(text)
  text.gsub!(UNICODE_MARKER) do
    unicode($1.hex)
  end
  text
end

.encode!(text) ⇒ String

Decodes all unicode chars into escape sequences in place

Parameters:

  • text (String)

Returns:

  • (String) —

    The decoded text for chaining



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# File 'lib/java-properties/encoding/unicode.rb', line 28

def self.encode!(text)
  buffer = StringIO.new
  text.each_char do |char|
    if char.ascii_only?
      buffer << char
    else
      buffer << UNICODE_ESCAPE
      buffer << hex(char.codepoints.first)
    end
  end
  text.replace buffer.string
  text
end

.hex(codepoint) ⇒ Object 



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# File 'lib/java-properties/encoding/unicode.rb', line 48

def self.hex(codepoint)
  hex  = codepoint.to_s(16)
  size = [4, hex.size].max
  target_size = size.even? ? size : size+1
  hex.rjust(target_size, '0')
end

.unicode(code) ⇒ Object 



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# File 'lib/java-properties/encoding/unicode.rb', line 44

def self.unicode(code)
  code.chr(::Encoding::UTF_8)
end