Class: MarkdownIt::RulesInline::Emphasis

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

Constant Summary

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

Class Method Details

.postProcess(state) ⇒ Object

Walk through delimiter list and replace text tokens with tags



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# File 'lib/motion-markdown-it/rules_inline/emphasis.rb', line 110

def self.postProcess(state)
  tokens_meta = state.tokens_meta
  max = state.tokens_meta.length

  private_postProcess(state, state.delimiters)

  0.upto(max - 1) do |curr|
    if (tokens_meta[curr] && tokens_meta[curr][:delimiters])
      private_postProcess(state, tokens_meta[curr][:delimiters])
    end
  end
end

.private_postProcess(state, delimiters) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_inline/emphasis.rb', line 55

def self.private_postProcess(state, delimiters)
  max = delimiters.length

  i = max - 1
  while i >= 0
    startDelim = delimiters[i]

    (i -= 1) and next if startDelim[:marker] != 0x5F && startDelim[:marker] != 0x2A #  _ and *

    # Process only opening markers
    (i -= 1) and next if startDelim[:end] == -1

    endDelim = delimiters[startDelim[:end]]

    # If the previous delimiter has the same marker and is adjacent to this one,
    # merge those into one strong delimiter.
    #
    # `<em><em>whatever</em></em>` -> `<strong>whatever</strong>`
    #
    isStrong = i > 0 &&
               delimiters[i - 1][:end] == startDelim[:end] + 1 &&
               # check that first two markers match and adjacent
               delimiters[i - 1][:marker] == startDelim[:marker] &&
               delimiters[i - 1][:token] == startDelim[:token] - 1 &&
               # check that last two markers are adjacent (we can safely assume they match)
               delimiters[startDelim[:end] + 1][:token] == endDelim[:token] + 1

    ch = fromCodePoint(startDelim[:marker])

    token         = state.tokens[startDelim[:token]]
    token.type    = isStrong ? 'strong_open' : 'em_open'
    token.tag     = isStrong ? 'strong' : 'em'
    token.nesting = 1
    token.markup  = isStrong ? ch + ch : ch
    token.content = ''

    token         = state.tokens[endDelim[:token]]
    token.type    = isStrong ? 'strong_close' : 'em_close'
    token.tag     = isStrong ? 'strong' : 'em'
    token.nesting = -1
    token.markup  = isStrong ? ch + ch : ch
    token.content = ''

    if isStrong
      state.tokens[delimiters[i - 1][:token]].content = ''
      state.tokens[delimiters[startDelim[:end] + 1][:token]].content = ''
      i -= 1
    end

    i -= 1
  end
end

.tokenize(state, silent) ⇒ Object

Insert each marker as a separate text token, and add it to delimiter list



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# File 'lib/motion-markdown-it/rules_inline/emphasis.rb', line 10

def self.tokenize(state, silent)
  start   = state.pos
  marker  = charCodeAt(state.src, start)

  return false if silent

  return false if (marker != 0x5F && marker != 0x2A) #  _ and *

  scanned = state.scanDelims(state.pos, marker == 0x2A)

  0.upto(scanned[:length] - 1) do |i|
    token         = state.push('text', '', 0)
    token.content = fromCodePoint(marker)

    state.delimiters.push({
      # Char code of the starting marker (number).
      #
      marker: marker,

      # Total length of these series of delimiters.
      #
      length: scanned[:length],

      # A position of the token this delimiter corresponds to.
      #
      token:  state.tokens.length - 1,

      # If this delimiter is matched as a valid opener, `end` will be
      # equal to its position, otherwise it's `-1`.
      #
      end:    -1,

      # Boolean flags that determine if this delimiter could open or close
      # an emphasis.
      #
      open:   scanned[:can_open],
      close:  scanned[:can_close]
    })
  end

  state.pos += scanned[:length]

  return true
end