Module: Asciidoctor::PDF::TextTransformer

Included in:
FormattedText::Transform, IndexCatalog, Asciidoctor::Prawn::Extensions
Defined in:
lib/asciidoctor/pdf/text_transformer.rb

Constant Summary collapse

XMLMarkupRx = 
/&#?[a-z\d]+;|</
PCDATAFilterRx = 
/(&#?[a-z\d]+;|<[^>]+>)|([^&<]+)/
TagFilterRx = 
/(<[^>]+>)|([^<]+)/
ContiguousCharsRx = 
/\p{Graph}+/
WordRx = 
/\p{Word}+/
BareClassRx = 
/ class="bare[" ]/
Hyphen = 
'-'
SoftHyphen = 
?\u00ad
LowerAlphaChars = 
'a-z'
SmallCapsChars =

NOTE: use more widely-supported ғ instead of ꜰ as replacement for F NOTE: use more widely-supported ǫ instead of ꞯ as replacement for Q NOTE: use more widely-supported s (lowercase latin “s”) instead of ꜱ as replacement for S NOTE: in small caps, x (lowercase latin “x”) remains unchanged

'ᴀʙᴄᴅᴇғɢʜɪᴊᴋʟᴍɴoᴘǫʀsᴛᴜᴠᴡxʏᴢ'

Instance Method Summary collapse

Instance Method Details

#capitalize_words(string) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 29

def capitalize_words string
  string.gsub(ContiguousCharsRx) { $&.capitalize }
end

#capitalize_words_pcdata(string) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 21

def capitalize_words_pcdata string
  if XMLMarkupRx.match? string
    string.gsub(PCDATAFilterRx) { $2 ? (capitalize_words $2) : $1 }
  else
    capitalize_words string
  end
end

#hyphenate_words(string, hyphenator) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 49

def hyphenate_words string, hyphenator
  string.gsub(WordRx) { hyphenator.visualize $&, SoftHyphen }
end

#hyphenate_words_pcdata(string, hyphenator) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 33

def hyphenate_words_pcdata string, hyphenator
  if XMLMarkupRx.match? string
    skipping = false
    string.gsub PCDATAFilterRx do
      if $2
        skipping ? $2 : (hyphenate_words $2, hyphenator)
      else
        skipping = skipping ? $1 != '</a>' : ($1.start_with? '<a ') && (BareClassRx.match? $1)
        $1
      end
    end
  else
    hyphenate_words string, hyphenator
  end
end

#lowercase_pcdata(string) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 53

def lowercase_pcdata string
  if string.include? '<'
    string.gsub(TagFilterRx) { $2 ? $2.downcase : $1 }
  else
    string.downcase
  end
end

#smallcaps(string) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 77

def smallcaps string
  string.tr LowerAlphaChars, SmallCapsChars
end

#smallcaps_pcdata(string) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 69

def smallcaps_pcdata string
  if XMLMarkupRx.match? string
    string.gsub(PCDATAFilterRx) { $2 ? (smallcaps $2) : $1 }
  else
    smallcaps string
  end
end

#transform_text(text, transform) ⇒ Object

Apply the text transform to the specified text.

Supported transform values are “uppercase”, “lowercase”, or “none” (passed as either a String or a Symbol). When the uppercase transform is applied to the text, it correctly uppercases visible text while leaving markup and named character entities unchanged. The none transform returns the text unmodified.



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 89

def transform_text text, transform
  case transform
  when :uppercase, 'uppercase'
    uppercase_pcdata text
  when :lowercase, 'lowercase'
    lowercase_pcdata text
  when :capitalize, 'capitalize'
    capitalize_words_pcdata text
  when :smallcaps, 'smallcaps'
    smallcaps_pcdata text
  else
    text
  end
end

#uppercase_pcdata(string) ⇒ Object 



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# File 'lib/asciidoctor/pdf/text_transformer.rb', line 61

def uppercase_pcdata string
  if XMLMarkupRx.match? string
    string.gsub(PCDATAFilterRx) { $2 ? $2.upcase : $1 }
  else
    string.upcase
  end
end