Class: MarkdownIt::RulesBlock::Blockquote

Inherits:
Object
  • Object
show all
Extended by:
Common::Utils
Defined in:
lib/motion-markdown-it/rules_block/blockquote.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

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



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

def self.blockquote(state, startLine, endLine, silent)
  oldLineMax  = state.lineMax
  pos         = state.bMarks[startLine] + state.tShift[startLine]
  max         = state.eMarks[startLine]

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

  # check the block quote marker
  return false if state.src.charCodeAt(pos) != 0x3E # >
  pos += 1

  # we know that it's going to be a valid blockquote,
  # so no point trying to find the end of it in silent mode
  return true if silent

  # skip spaces after ">" and re-calculate offset
  initial = offset = state.sCount[startLine] + pos - (state.bMarks[startLine] + state.tShift[startLine])

  # skip one optional space after '>'
  if state.src.charCodeAt(pos) == 0x20 # space
    # ' >   test '
    #     ^ -- position start of line here:
    pos             += 1
    initial         += 1
    offset          +=1
    adjustTab        = false
    spaceAfterMarker = true
  elsif state.src.charCodeAt(pos) == 0x09 # tab
    spaceAfterMarker = true

    if ((state.bsCount[startLine] + offset) % 4 == 3)
      # '  >\t  test '
      #       ^ -- position start of line here (tab has width===1)
      pos       += 1
      initial   += 1
      offset    += 1
      adjustTab  = false
    else
      # ' >\t  test '
      #    ^ -- position start of line here + shift bsCount slightly
      #         to make extra space appear
      adjustTab = true
    end
  else
    spaceAfterMarker = false
  end

  oldBMarks               = [ state.bMarks[startLine] ]
  state.bMarks[startLine] = pos

  while pos < max
    ch = state.src.charCodeAt(pos)

    if isSpace(ch)
      if ch == 0x09
        offset += 4 - (offset + state.bsCount[startLine] + (adjustTab ? 1 : 0)) % 4
      else
        offset += 1
      end
    else
      break
    end

    pos += 1
  end

  oldBSCount = [ state.bsCount[startLine] ]
  state.bsCount[startLine] = state.sCount[startLine] + 1 + (spaceAfterMarker ? 1 : 0)

  lastLineEmpty = pos >= max

  oldSCount = [ state.sCount[startLine] ]
  state.sCount[startLine] = offset - initial

  oldTShift               = [ state.tShift[startLine] ]
  state.tShift[startLine] = pos - state.bMarks[startLine]

  terminatorRules         = state.md.block.ruler.getRules('blockquote')

  oldParentType     = state.parentType
  state.parentType  = 'blockquote'
  wasOutdented      = false

  # Search the end of the block
  #
  # Block ends with either:
  #  1. an empty line outside:
  #     ```
  #     > test
  #
  #     ```
  #  2. an empty line inside:
  #     ```
  #     >
  #     test
  #     ```
  #  3. another tag:
  #     ```
  #     > test
  #      - - -
  #     ```
  nextLine = startLine + 1
  while nextLine < endLine
    # check if it's outdented, i.e. it's inside list item and indented
    # less than said list item:
    #
    # ```
    # 1. anything
    #    > current blockquote
    # 2. checking this line
    # ```
    wasOutdented = true if (state.sCount[nextLine] < state.blkIndent)

    pos = state.bMarks[nextLine] + state.tShift[nextLine]
    max = state.eMarks[nextLine]

    if pos >= max
      # Case 1: line is not inside the blockquote, and this line is empty.
      break
    end

    if state.src.charCodeAt(pos) == 0x3E && !wasOutdented # >
      pos += 1
      # This line is inside the blockquote.

      # skip spaces after ">" and re-calculate offset
      initial = offset = state.sCount[nextLine] + pos - (state.bMarks[nextLine] + state.tShift[nextLine])

      # skip one optional space after '>'
      if state.src.charCodeAt(pos) == 0x20 # space
        # ' >   test '
        #     ^ -- position start of line here:
        pos             += 1
        initial         += 1
        offset          += 1
        adjustTab        = false
        spaceAfterMarker = true
      elsif state.src.charCodeAt(pos) == 0x09 # tab
        spaceAfterMarker = true

        if ((state.bsCount[nextLine] + offset) % 4 == 3)
          # '  >\t  test '
          #       ^ -- position start of line here (tab has width===1)
          pos       += 1
          initial   += 1
          offset    += 1
          adjustTab  = false
        else
          # ' >\t  test '
          #    ^ -- position start of line here + shift bsCount slightly
          #         to make extra space appear
          adjustTab = true
        end
      else
        spaceAfterMarker = false
      end

      oldBMarks.push(state.bMarks[nextLine])
      state.bMarks[nextLine] = pos

      while pos < max
        ch = state.src.charCodeAt(pos)

        if isSpace(ch)
          if ch == 0x09
            offset += 4 - (offset + state.bsCount[nextLine] + (adjustTab ? 1 : 0)) % 4
          else
            offset += 1
          end
        else
          break
        end

        pos += 1
      end

      lastLineEmpty = pos >= max

      oldBSCount.push(state.bsCount[nextLine])
      state.bsCount[nextLine] = state.sCount[nextLine] + 1 + (spaceAfterMarker ? 1 : 0)

      oldSCount.push(state.sCount[nextLine])
      state.sCount[nextLine] = offset - initial\

      oldTShift.push(state.tShift[nextLine])
      state.tShift[nextLine] = pos - state.bMarks[nextLine]
      nextLine += 1
      next
    else
      pos += 1
    end

    # Case 2: line is not inside the blockquote, and the last line was empty.
    break if lastLineEmpty

    # Case 3: another tag found.
    terminate = false
    (0...terminatorRules.length).each do |i|
      if terminatorRules[i].call(state, nextLine, endLine, true)
        terminate = true
        break
      end
    end

    if terminate
      # Quirk to enforce "hard termination mode" for paragraphs;
      # normally if you call `tokenize(state, startLine, nextLine)`,
      # paragraphs will look below nextLine for paragraph continuation,
      # but if blockquote is terminated by another tag, they shouldn't
      state.lineMax = nextLine

      if state.blkIndent != 0
        # state.blkIndent was non-zero, we now set it to zero,
        # so we need to re-calculate all offsets to appear as
        # if indent wasn't changed
        oldBMarks.push(state.bMarks[nextLine])
        oldBSCount.push(state.bsCount[nextLine])
        oldTShift.push(state.tShift[nextLine])
        oldSCount.push(state.sCount[nextLine])
        state.sCount[nextLine] -= state.blkIndent
      end

      break
    end

    oldBMarks.push(state.bMarks[nextLine])
    oldBSCount.push(state.bsCount[nextLine])
    oldTShift.push(state.tShift[nextLine])
    oldSCount.push(state.sCount[nextLine])

    # A negative indentation means that this is a paragraph continuation
    #
    state.sCount[nextLine] = -1
    nextLine += 1
  end

  oldIndent         = state.blkIndent
  state.blkIndent   = 0

  token             = state.push('blockquote_open', 'blockquote', 1)
  token.markup      = '>'
  token.map         = lines = [ startLine, 0 ]

  state.md.block.tokenize(state, startLine, nextLine)

  token             = state.push('blockquote_close', 'blockquote', -1)
  token.markup      = '>'

  state.lineMax     = oldLineMax;
  state.parentType  = oldParentType
  lines[1]          = state.line

  # Restore original tShift; this might not be necessary since the parser
  # has already been here, but just to make sure we can do that.
  (0...oldTShift.length).each do |i|
    state.bMarks[i + startLine]   = oldBMarks[i]
    state.tShift[i + startLine]   = oldTShift[i]
    state.sCount[i + startLine]   = oldSCount[i]
    state.bsCount[i + startLine]  = oldBSCount[i]
  end
  state.blkIndent = oldIndent
  return true
end