Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/hebrew.rb

Overview

extend String class

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.is_codepoint_nikkud_cp1255(cp) ⇒ Object 



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# File 'lib/hebrew.rb', line 140

def self.is_codepoint_nikkud_cp1255(cp)
  return ((cp > 191 && cp < 205) or [209, 210].include?(cp))
  #NIKKUD_CP1255.include?(cp) # cleaner, but much slower
end

.is_codepoint_nikkud_utf8(cp) ⇒ Object

NIKKUD_CP1255.include?(cp) # cleaner, but much slower



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# File 'lib/hebrew.rb', line 144

def self.is_codepoint_nikkud_utf8(cp)
  return ((cp > 0x05af && cp < 0x05bd) or [0x05c1, 0x05c2].include?(cp))
  #NIKKUD_UTF8.include?(cp) # cleaner, but much slower
end

.is_final_by_encoding(c, encoding) ⇒ Object

this will return true if the first parameter is a final letter in the encoding of the second parameter



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# File 'lib/hebrew.rb', line 159

def self.is_final_by_encoding(c, encoding)
  case encoding
  when Encoding::UTF_8
    FIANLS_UTF8.include?(c)
  when Encoding::WINDOWS_1255 || Encoding::CP1255
    FINALS_CP1255.include?(c)
  end
end

.is_nikkud_by_encoding(c, encoding) ⇒ Object

this will return true if the first parameter is a nikkud character in the encoding of the second parameter



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# File 'lib/hebrew.rb', line 149

def self.is_nikkud_by_encoding(c, encoding)
  case encoding
  when Encoding::UTF_8
    self.is_codepoint_nikkud_utf8(c.codepoints.first)
  when Encoding::WINDOWS_1255 || Encoding::CP1255
    self.is_codepoint_nikkud_cp1255(c.codepoints.first)
  # TODO: add Mac encoding?
  end
end

Instance Method Details

#any_hebrew? ⇒ Boolean

this will return true if the string contains any Hebrew character (short circuit)

Returns:

  • (Boolean) 


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# File 'lib/hebrew.rb', line 77

def any_hebrew?
  case self.encoding
  when Encoding::UTF_8
    self.each_codepoint {|cp| return true if is_hebrew_codepoint_utf8(cp) }
    return false
  when Encoding::WINDOWS_1255 || Encoding::CP1255
    self.each_codepoint {|cp| return true if is_hebrew_codepoint_cp1255(cp) }
    return false
  else
    return false
  end
end

#any_nikkud? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hebrew.rb', line 113

def any_nikkud?
  func = case self.encoding
    when Encoding::UTF_8
      :is_codepoint_nikkud_utf8
    when Encoding::WINDOWS_1255 || Encoding::CP1255
      :is_codepoint_nikkud_cp1255
    else
      :falsehood
    end
  self.each_codepoint{|cp| return true if String.send(func, cp)}
  return false
end

#falsehood ⇒ Object 



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# File 'lib/hebrew.rb', line 90

def falsehood
  false
end

#is_hebrew_codepoint_cp1255(cp) ⇒ Object 



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# File 'lib/hebrew.rb', line 126

def is_hebrew_codepoint_cp1255(cp)
  return ((cp > 191 && cp < 202) or [203, 204, 209, 210].include?(cp))
end

#is_hebrew_codepoint_utf8(cp) ⇒ Object 



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# File 'lib/hebrew.rb', line 129

def is_hebrew_codepoint_utf8(cp)
  return (cp >= HEB_UTF8_START && cp <= HEB_UTF8_END)
end

#is_nikkud(c) ⇒ Object

this will return true if the parameter is a nikkud character



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# File 'lib/hebrew.rb', line 136

def is_nikkud(c)
  self.class.is_nikkud_by_encoding(c, self.encoding) # delegate to class method based on instance encoding
end

#naive_full_nikkud ⇒ Object

this will add matres lectionis (yods and vavs as vowels) after diacritics that denote those vowels. The result won’t always be morphologically correct Hebrew, but is useful for generating mostly-likely variants users may search for, when typing inputs (almost no Hebrew users know how to produce diacritics on the keyboard).



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# File 'lib/hebrew.rb', line 95

def naive_full_nikkud
  ret = ''
  prev_char = nil
  case self.encoding
  when Encoding::UTF_8
    self.each_char do |c|
      ret += c
      ret += 'י' if c.codepoints[0] == HEB_UTF8_XIRIK
      ret += 'ו' if c.codepoints[0] == HEB_UTF8_QUBBUTS
      ret += 'ו' if c.codepoints[0] == HEB_UTF8_XOLAM && prev_char != 'ו'
      prev_char = c
    end
    return ret.gsub("\u05b4יי","\u05b4י") # get rid of extraneous yods possibly added because we weren't looking ahead
  else
    return nil # not implemented for other encodings for now.
  end
end

#strip_hebrew ⇒ Object 



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# File 'lib/hebrew.rb', line 23

def strip_hebrew
  case self.encoding
  when Encoding::UTF_8
    strip_hebrew_utf8
  when Encoding::WINDOWS_1255 || Encoding::CP1255
    strip_hebrew_cp1255
  end
end

#strip_hebrew_cp1255 ⇒ Object 



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# File 'lib/hebrew.rb', line 40

def strip_hebrew_cp1255
  target = ''.force_encoding('windows-1255')
  self.each_codepoint {|cp|
    unless self.class.is_codepoint_nikkud_cp1255(cp) or self.is_hebrew_codepoint_cp1255(cp)
      target << cp.chr(Encoding::CP1255) # is there a neater way?
    end
  }
  return target
end

#strip_hebrew_utf8 ⇒ Object 



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# File 'lib/hebrew.rb', line 31

def strip_hebrew_utf8
  target = ''
  self.each_codepoint {|cp|
    unless self.class.is_codepoint_nikkud_utf8(cp) or self.is_hebrew_codepoint_utf8(cp)
      target << cp.chr(Encoding::UTF_8)
    end
  }
  return target
end

#strip_nikkud ⇒ Object

this will return the string, stripped of any Hebrew nikkud characters



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# File 'lib/hebrew.rb', line 50

def strip_nikkud
  case self.encoding
  when Encoding::UTF_8
    strip_nikkud_utf8
  when Encoding::WINDOWS_1255 || Encoding::CP1255
    strip_nikkud_cp1255
  end
end

#strip_nikkud_cp1255 ⇒ Object 



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# File 'lib/hebrew.rb', line 58

def strip_nikkud_cp1255
  target = ''.force_encoding('windows-1255')
  self.each_codepoint {|cp|
    unless self.class.is_codepoint_nikkud_cp1255(cp)
      target << cp.chr(Encoding::CP1255) # is there a neater way?
    end
  }
  return target
end

#strip_nikkud_utf8 ⇒ Object 



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# File 'lib/hebrew.rb', line 67

def strip_nikkud_utf8
  target = ''
  self.each_codepoint {|cp|
    unless self.class.is_codepoint_nikkud_utf8(cp)
      target << cp.chr(Encoding::UTF_8)
    end
  }
  return target
end