Module: Asciidoctor::Pdf::Linewrap::Ja::Converter

Defined in:
lib/asciidoctor/pdf/linewrap/ja/converter.rb

Constant Summary collapse

PROHIBIT_LINE_BREAK_BEFORE =

行頭禁則文字

'’”）〕］｝〉》」』】｠〙〗»〟' +  # 終わり括弧類（cl-02）
'‐〜゠–' + # ハイフン類（cl-03）
'！？‼⁇⁈⁉' + # 区切り約物（cl-04）
'・：；' + # 中点類（cl-05）
'。．' + # 句点類（cl-06）
'、，' + # 読点類（cl-07）
'ヽヾゝゞ々〻' + # 繰返し記号（cl-09）
'ー' + # 長音記号（cl-10）
'ぁぃぅぇぉァィゥェォっゃゅょゎゕゖッャュョヮヵヶㇰㇱㇲㇳㇴㇵㇶㇷㇸㇹㇺㇻㇼㇽㇾㇿㇷ゚' + # 小書きの仮名（cl-11）
'）〕］'
PROHIBIT_LINE_BREAK_AFTER =

行末禁則文字

'‘“（〔［｛〈《「『【｟〘〖«〝' + # 始め括弧類（cl-01）
'（〔［'
PROHIBIT_DIVIDE =

分離禁止文字

'—…‥〳〴〵'
ZERO_WIDTH_SPACE =

ゼロ幅スペース

'{zwsp}'

Class Method Summary collapse

Class Method Details

.insert_zero_width_space(line) ⇒ Object

ZERO_WIDTH_SPACE = '★'



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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 32

def self.insert_zero_width_space(line)

  return line if line.nil?

  new_line = ''

  line.each_char.with_index do |ch, idx|

    new_line << ch
    new_line << ZERO_WIDTH_SPACE if insert_zero_width_space?(ch, line[idx + 1])
  end

  return remove_zero_width_space(new_line)
end

.insert_zero_width_space?(ch, next_ch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 47

def self.insert_zero_width_space?(ch, next_ch)

  if japanese_char?(ch)
    return !prohibit_line_break?(ch, next_ch)
  elsif next_ch != nil && japanese_char?(next_ch)
    return !prohibit_line_break_before?(next_ch)
  end

  return false
end

.japanese_char?(ch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 64

def self.japanese_char?(ch)
  (/[\p{Han}\p{Hiragana}\p{Katakana}ー]/ === ch) \
  || PROHIBIT_LINE_BREAK_BEFORE.include?(ch) \
  || PROHIBIT_LINE_BREAK_AFTER.include?(ch) \
  || PROHIBIT_DIVIDE.include?(ch)
end

.prohibit_divide?(ch, next_ch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 83

def self.prohibit_divide?(ch, next_ch)
  next_ch == nil || (PROHIBIT_DIVIDE.include?(ch) && PROHIBIT_DIVIDE.include?(next_ch))
end

.prohibit_line_break?(ch, next_ch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 71

def self.prohibit_line_break?(ch, next_ch)
  prohibit_line_break_after?(ch) || prohibit_line_break_before?(next_ch) || prohibit_divide?(ch, next_ch)
end

.prohibit_line_break_after?(ch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 75

def self.prohibit_line_break_after?(ch)
  PROHIBIT_LINE_BREAK_AFTER.include?(ch)
end

.prohibit_line_break_before?(ch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 79

def self.prohibit_line_break_before?(ch)
  ch == nil || PROHIBIT_LINE_BREAK_BEFORE.include?(ch)
end

.remove_zero_width_space(line) ⇒ Object 



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# File 'lib/asciidoctor/pdf/linewrap/ja/converter.rb', line 58

def self.remove_zero_width_space(line)
  line.gsub(/http.*?[\]\s]/) do |href|
    href.gsub(/#{ZERO_WIDTH_SPACE}/, "")
  end
end