Module: AnnotateRb::Helper

Defined in:
lib/annotate_rb/helper.rb

Constant Summary collapse

DOUBLE_WIDTH_RANGES =

Unicode ranges that typically occupy 2 columns in monospace terminals. This is a simplified wcwidth implementation.

[
  0x1100..0x115F,   # Hangul Jamo
  0x2E80..0x303E,   # CJK Radicals, Kangxi, CJK Symbols
  0x3040..0x4DBF,   # Hiragana, Katakana, Bopomofo, CJK Ext A
  0x4E00..0x9FFF,   # CJK Unified Ideographs
  0xAC00..0xD7AF,   # Hangul Syllables
  0xF900..0xFAFF,   # CJK Compatibility Ideographs
  0xFE30..0xFE6F,   # CJK Compatibility Forms
  0xFF01..0xFF60,   # Fullwidth Forms
  0xFFE0..0xFFE6,   # Fullwidth Signs
  0x20000..0x2FA1F, # CJK Extensions B-F
  0x30000..0x3134F  # CJK Extensions G-I
].freeze

Class Method Summary collapse

Class Method Details

.fallback(*args) ⇒ Object

TODO: Find another implementation that doesn’t depend on ActiveSupport



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# File 'lib/annotate_rb/helper.rb', line 27

def fallback(*args)
  args.compact.detect(&:present?)
end

.width(string) ⇒ Object 



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# File 'lib/annotate_rb/helper.rb', line 22

def width(string)
  string.each_char.sum { |char| double_width?(char) ? 2 : 1 }
end