Class: MarkdownIt::RulesInline::Strikethrough

Inherits:
Object
  • Object
show all
Extended by:
Common::Utils
Defined in:
lib/motion-markdown-it/rules_inline/strikethrough.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/strikethrough.rb', line 111

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/strikethrough.rb', line 52

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

  0.upto(max - 1) do |i|
    startDelim = delimiters[i]

    next if startDelim[:marker] != 0x7E # ~

    next if startDelim[:end] == -1

    endDelim = delimiters[startDelim[:end]]

    token         = state.tokens[startDelim[:token]]
    token.type    = 's_open'
    token.tag     = 's'
    token.nesting = 1
    token.markup  = '~~'
    token.content = ''

    token         = state.tokens[endDelim[:token]]
    token.type    = 's_close'
    token.tag     = 's'
    token.nesting = -1
    token.markup  = '~~'
    token.content = ''

    if (state.tokens[endDelim[:token] - 1].type == 'text' &&
        state.tokens[endDelim[:token] - 1].content == '~')
      loneMarkers.push(endDelim[:token] - 1)
    end
  end

  # If a marker sequence has an odd number of characters, it's splitted
  # like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
  # start of the sequence.
  #
  # So, we have to move all those markers after subsequent s_close tags.
  #
  while loneMarkers.length > 0
    i = loneMarkers.pop
    j = i + 1

    while j < state.tokens.length && state.tokens[j].type == 's_close'
      j += 1
    end

    j -= 1

    if i != j
      token = state.tokens[j]
      state.tokens[j] = state.tokens[i]
      state.tokens[i] = token
    end
  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/strikethrough.rb', line 10

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

  return false if silent

  return false if marker != 0x7E # ~

  scanned = state.scanDelims(state.pos, true)
  len     = scanned[:length]
  ch      = fromCodePoint(marker)

  return false if len < 2

  if len % 2 > 0
    token         = state.push('text', '', 0)
    token.content = ch
    len          -= 1
  end

  i = 0
  while i < len
    token         = state.push('text', '', 0)
    token.content = ch + ch

    state.delimiters.push({
      marker: marker,
      length: 0,     # disable "rule of 3" length checks meant for emphasis
      jump:   i / 2, # for `~~` 1 marker = 2 characters
      token:  state.tokens.length - 1,
      end:    -1,
      open:   scanned[:can_open],
      close:  scanned[:can_close]
    })
    i += 2
  end

  state.pos += scanned[:length]

  return true
end