Class: MarkdownIt::RulesCore::Smartquotes

Inherits:
Object
  • Object
show all
Extended by:
Common::Utils
Defined in:
lib/motion-markdown-it/rules_core/smartquotes.rb

Constant Summary collapse

QUOTE_TEST_RE = 
/['"]/
QUOTE_RE = 
/['"]/
APOSTROPHE =

’

"\u2019"

Constants included from Common::Utils

Common::Utils::DIGITAL_ENTITY_TEST_RE, Common::Utils::ENTITY_RE, Common::Utils::HTML_ESCAPE_REPLACE_RE, Common::Utils::HTML_ESCAPE_TEST_RE, Common::Utils::HTML_REPLACEMENTS, Common::Utils::REGEXP_ESCAPE_RE, Common::Utils::UNESCAPE_ALL_RE, Common::Utils::UNESCAPE_MD_RE, Common::Utils::UNICODE_PUNCT_RE

Class Method Summary collapse

Methods included from Common::Utils

arrayReplaceAt, assign, escapeHtml, escapeRE, fromCharCode, fromCodePoint, isMdAsciiPunct, isPunctChar, isSpace, isValidEntityCode, isWhiteSpace, normalizeReference, replaceEntityPattern, unescapeAll, unescapeMd

Class Method Details

.process_inlines(tokens, state) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/smartquotes.rb', line 18

def self.process_inlines(tokens, state)
  stack = []

  (0...tokens.length).each do |i|
    token = tokens[i]

    thisLevel = tokens[i].level

    j = stack.length - 1
    while j >= 0
      break if (stack[j][:level] <= thisLevel)
      j -= 1
    end

    # stack.length = j + 1
    stack = (j < stack.length ? stack.slice(0, j + 1) : stack.fill(nil, stack.length...(j+1)))

    next if (token.type != 'text')

    text = token.content
    pos  = 0
    max  = text.length

    # OUTER loop
    while pos < max
      continue_outer_loop = false
      t = QUOTE_RE.match(text, pos)
      break if t.nil?

      canOpen  = true
      canClose = true
      pos      = t.begin(0) + 1
      isSingle = (t[0] == "'")

      # Find previous character,
      # default to space if it's the beginning of the line
      #
      lastChar = 0x20

      if t.begin(0) - 1 >= 0
        lastChar = text.charCodeAt(t.begin(0) - 1)
      else
        (i - 1).downto(0) do |j|
          break if tokens[j].type == 'softbreak' || tokens[j].type == 'hardbreak' # lastChar defaults to 0x20
          next if tokens[j].type != 'text'

          lastChar = tokens[j].content.charCodeAt(tokens[j].content.length - 1)
          break
        end
      end

      # Find next character,
      # default to space if it's the end of the line
      #
      nextChar = 0x20

      if pos < max
        nextChar = text.charCodeAt(pos)
      else
        (i + 1).upto(tokens.length - 1) do |j|
          break if tokens[j].type == 'softbreak' || tokens[j].type == 'hardbreak' # nextChar defaults to 0x20
          next if tokens[j].type != 'text'

          nextChar = tokens[j].content.charCodeAt(0)
          break
        end
      end

      isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(fromCodePoint(lastChar))
      isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(fromCodePoint(nextChar))

      isLastWhiteSpace = isWhiteSpace(lastChar)
      isNextWhiteSpace = isWhiteSpace(nextChar)

      if (isNextWhiteSpace)
        canOpen = false
      elsif (isNextPunctChar)
        if (!(isLastWhiteSpace || isLastPunctChar))
          canOpen = false
        end
      end

      if (isLastWhiteSpace)
        canClose = false
      elsif (isLastPunctChar)
        if (!(isNextWhiteSpace || isNextPunctChar))
          canClose = false
        end
      end

      if (nextChar == 0x22 && t[0] == '"') # "
        if (lastChar >= 0x30 && lastChar <= 0x39)   # >= 0  && <= 9
          # special case: 1"" - count first quote as an inch
          canClose = canOpen = false
        end
      end

      if (canOpen && canClose)
        # treat this as the middle of the word
        canOpen  = false
        canClose = isNextPunctChar
      end

      if (!canOpen && !canClose)
        # middle of word
        if (isSingle)
          token.content = replaceAt(token.content, t.begin(0), APOSTROPHE)
        end
        next
      end

      if (canClose)
        # this could be a closing quote, rewind the stack to get a match
        j = stack.length - 1
        while j >= 0
          item = stack[j]
          break if (stack[j][:level] < thisLevel)
          if (item[:single] == isSingle && stack[j][:level] == thisLevel)
            item = stack[j]
            if isSingle
              openQuote  = state.md.options[:quotes][2]
              closeQuote = state.md.options[:quotes][3]
            else
              openQuote  = state.md.options[:quotes][0]
              closeQuote = state.md.options[:quotes][1]
            end

            # replace token.content *before* tokens[item.token].content,
            # because, if they are pointing at the same token, replaceAt
            # could mess up indices when quote length != 1
            token.content = replaceAt(token.content, t.begin(0), closeQuote)
            tokens[item[:token]].content = replaceAt(tokens[item[:token]].content, item[:pos], openQuote)

            pos += closeQuote.length - 1
            pos += (openQuote.length - 1) if item[:token] == i

            text = token.content
            max  = text.length

            stack = (j < stack.length ? stack.slice(0, j) : stack.fill(nil, stack.length...(j)))  # stack.length = j
            continue_outer_loop = true    # continue OUTER;
            break
          end
          j -= 1
        end
      end
      next if continue_outer_loop

      if (canOpen)
        stack.push({
          token: i,
          pos: t.begin(0),
          single: isSingle,
          level: thisLevel
        })
      elsif (canClose && isSingle)
        token.content = replaceAt(token.content, t.begin(0), APOSTROPHE)
      end
    end
  end
end

.replaceAt(str, index, ch) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/smartquotes.rb', line 13

def self.replaceAt(str, index, ch)
  return str[0, index] + ch + str.slice_to_end(index + 1)
end

.smartquotes(state) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/smartquotes.rb', line 182

def self.smartquotes(state)
  return if (!state.md.options[:typographer])

  blkIdx = state.tokens.length - 1
  while blkIdx >= 0
    if (state.tokens[blkIdx].type != 'inline' || !(QUOTE_TEST_RE =~ state.tokens[blkIdx].content))
      blkIdx -= 1
      next
    end

    process_inlines(state.tokens[blkIdx].children, state)
    blkIdx -= 1
  end
end