method

g_unpack

v2.2.1 - Show latest stable - 0 notes - Class: ActiveSupport::Multibyte::Chars

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What's this?

g_unpack(string) public

Unpack the string at grapheme boundaries. Returns a list of character lists.

Example:

  Chars.g_unpack('à¤à¥à¤·à¤¿') #=> [[2325, 2381], [2359], [2367]]
  Chars.g_unpack('CafÃ©') #=> [[67], [97], [102], [233]]

Show source

# File activesupport/lib/active_support/multibyte/chars.rb, line 467
        def g_unpack(string)
          codepoints = u_unpack(string)
          unpacked = []
          pos = 0
          marker = 0
          eoc = codepoints.length
          while(pos < eoc)
            pos += 1
            previous = codepoints[pos-1]
            current = codepoints[pos]
            if (
                # CR X LF
                one = ( previous == UCD.boundary[:cr] and current == UCD.boundary[:lf] ) or
                # L X (L|V|LV|LVT)
                two = ( UCD.boundary[:l] === previous and in_char_class?(current, [:l,:v,:lv,:lvt]) ) or
                # (LV|V) X (V|T)
                three = ( in_char_class?(previous, [:lv,:v]) and in_char_class?(current, [:v,:t]) ) or
                # (LVT|T) X (T)
                four = ( in_char_class?(previous, [:lvt,:t]) and UCD.boundary[:t] === current ) or
                # X Extend
                five = (UCD.boundary[:extend] === current)
              )
            else
              unpacked << codepoints[marker..pos-1]
              marker = pos
            end
          end 
          unpacked
        end

g_unpack

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