Class: MarkdownIt::RulesBlock::Table

Inherits:
Object
  • Object
show all
Extended by:
Common::Utils
Defined in:
lib/motion-markdown-it/rules_block/table.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, escapeHtml, escapeRE, fromCharCode, fromCodePoint, isMdAsciiPunct, isPunctChar, isSpace, isValidEntityCode, isWhiteSpace, normalizeReference, replaceEntityPattern, unescapeAll, unescapeMd

Class Method Details

.escapedSplit(str) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_block/table.rb', line 17

def self.escapedSplit(str)
  result       = []
  pos          = 0
  max          = str.length
  escapes      = 0
  lastPos      = 0
  backTicked   = false
  lastBackTick = 0

  ch           = str.charCodeAt(pos)

  while (pos < max)
    if ch == 0x60  # `
      if (backTicked)
        # make \` close code sequence, but not open it;
        # the reason is: `\` is correct code block
        backTicked = false
        lastBackTick = pos
      elsif escapes % 2 == 0
        backTicked   = !backTicked
        lastBackTick = pos
      end
    elsif (ch == 0x7c && (escapes % 2 == 0) && !backTicked)     # '|'
      result.push(str[lastPos...pos])
      lastPos = pos + 1
    end

    if ch == 0x5c   # '\'
      escapes += 1
    else
      escapes = 0
    end

    pos += 1
    # If there was an un-closed backtick, go back to just after
    # the last backtick, but as if it was a normal character
    if (pos == max && backTicked)
      backTicked = false
      pos = lastBackTick + 1
    end
    ch   = str.charCodeAt(pos)
  end

  result.push(str.slice_to_end(lastPos))

  return result
end

.getLine(state, line) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_block/table.rb', line 9

def self.getLine(state, line)
  pos = state.bMarks[line] + state.blkIndent
  max = state.eMarks[line]

  return state.src[pos, max - pos]
end

.table(state, startLine, endLine, silent) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_block/table.rb', line 67

def self.table(state, startLine, endLine, silent)
  # should have at least two lines
  return false if (startLine + 2 > endLine)

  nextLine = startLine + 1

  return false if (state.sCount[nextLine] < state.blkIndent)

  # if it's indented more than 3 spaces, it should be a code block
  return false if state.sCount[nextLine] - state.blkIndent >= 4

  # first character of the second line should be '|', '-', ':',
  # and no other characters are allowed but spaces;
  # basically, this is the equivalent of /^[-:|][-:|\s]*$/ regexp

  pos = state.bMarks[nextLine] + state.tShift[nextLine]
  return false if (pos >= state.eMarks[nextLine])

  ch = state.src.charCodeAt(pos)
  pos += 1
  return false if (ch != 0x7C && ch != 0x2D && ch != 0x3A) # | or  - or :

  while pos < state.eMarks[nextLine]
    ch = state.src.charCodeAt(pos)
    return false if (ch != 0x7C && ch != 0x2D && ch != 0x3A && !isSpace(ch)) # | or - or :

    pos += 1
  end

  lineText = getLine(state, startLine + 1)

  columns = lineText.split('|')
  aligns = []
  (0...columns.length).each do |i|
    t = columns[i].strip
    if t.empty?
      # allow empty columns before and after table, but not in between columns
      # e.g. allow ` |---| `, disallow ` ---||--- `
      if (i == 0 || i == columns.length - 1)
        next
      else
        return false
      end
    end

    return false if (/^:?-+:?$/ =~ t).nil?
    if (t.charCodeAt(t.length - 1) == 0x3A)  # ':'
      aligns.push(t.charCodeAt(0) == 0x3A ? 'center' : 'right')
    elsif (t.charCodeAt(0) == 0x3A)
      aligns.push('left')
    else
      aligns.push('')
    end
  end

  lineText = getLine(state, startLine).strip
  return false if !lineText.include?('|')
  return false if state.sCount[startLine] - state.blkIndent >= 4
  columns = self.escapedSplit(lineText.gsub(/^\||\|$/, ''))

  # header row will define an amount of columns in the entire table,
  # and align row shouldn't be smaller than that (the rest of the rows can)
  columnCount = columns.length
  return false if columnCount > aligns.length

  return true  if silent

  token     = state.push('table_open', 'table', 1)
  token.map = tableLines = [ startLine, 0 ]

  token     = state.push('thead_open', 'thead', 1)
  token.map = [ startLine, startLine + 1 ]

  token     = state.push('tr_open', 'tr', 1)
  token.map = [ startLine, startLine + 1 ]

  (0...columns.length).each do |i|
    token          = state.push('th_open', 'th', 1)
    token.map      = [ startLine, startLine + 1 ]
    unless aligns[i].empty?
      token.attrs  = [ [ 'style', 'text-align:' + aligns[i] ] ]
    end

    token          = state.push('inline', '', 0)
    token.content  = columns[i].strip
    token.map      = [ startLine, startLine + 1 ]
    token.children = []

    token          = state.push('th_close', 'th', -1)
  end

  token     = state.push('tr_close', 'tr', -1)
  token     = state.push('thead_close', 'thead', -1)

  token     = state.push('tbody_open', 'tbody', 1)
  token.map = tbodyLines = [ startLine + 2, 0 ]

  nextLine = startLine + 2
  while nextLine < endLine
    break if (state.sCount[nextLine] < state.blkIndent)

    lineText = getLine(state, nextLine).strip
    break if !lineText.include?('|')
    break if state.sCount[nextLine] - state.blkIndent >= 4
    columns = self.escapedSplit(lineText.gsub(/^\||\|$/, ''))

    token = state.push('tr_open', 'tr', 1)
    (0...columnCount).each do |i|
      token          = state.push('td_open', 'td', 1)
      unless aligns[i].empty?
        token.attrs  = [ [ 'style', 'text-align:' + aligns[i] ] ]
      end

      token          = state.push('inline', '', 0)
      token.content  = columns[i] ? columns[i].strip : ''
      token.children = []

      token          = state.push('td_close', 'td', -1)
    end
    token = state.push('tr_close', 'tr', -1)
    nextLine += 1
  end
  token = state.push('tbody_close', 'tbody', -1)
  token = state.push('table_close', 'table', -1)

  tableLines[1] = tbodyLines[1] = nextLine
  state.line = nextLine
  return true
end