Class: MarkdownIt::ParserBlock

Inherits:
Object
  • Object
show all
Defined in:
lib/motion-markdown-it/parser_block.rb

Constant Summary collapse

RULES = 
[
  # First 2 params - rule name & source. Secondary array - list of rules,
  # which can be terminated by this one.
  [ 'table',        lambda { |state, startLine, endLine, silent| RulesBlock::Table.table(state, startLine, endLine, silent) },      [ 'paragraph', 'reference' ] ],
  [ 'code',         lambda { |state, startLine, endLine, silent| RulesBlock::Code.code(state, startLine, endLine, silent) } ],
  [ 'fence',        lambda { |state, startLine, endLine, silent| RulesBlock::Fence.fence(state, startLine, endLine, silent) },      [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
  [ 'blockquote',   lambda { |state, startLine, endLine, silent| RulesBlock::Blockquote.blockquote(state, startLine, endLine, silent) }, [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
  [ 'hr',           lambda { |state, startLine, endLine, silent| RulesBlock::Hr.hr(state, startLine, endLine, silent) },         [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
  [ 'list',         lambda { |state, startLine, endLine, silent| RulesBlock::List.list(state, startLine, endLine, silent) },       [ 'paragraph', 'reference', 'blockquote' ] ],
  [ 'reference',    lambda { |state, startLine, endLine, silent| RulesBlock::Reference.reference(state, startLine, endLine, silent) } ],
  [ 'heading',      lambda { |state, startLine, endLine, silent| RulesBlock::Heading.heading(state, startLine, endLine, silent) },    [ 'paragraph', 'reference', 'blockquote' ] ],
  [ 'lheading',     lambda { |state, startLine, endLine, silent| RulesBlock::Lheading.lheading(state, startLine, endLine, silent) } ],
  [ 'html_block',   lambda { |state, startLine, endLine, silent| RulesBlock::HtmlBlock.html_block(state, startLine, endLine, silent) }, [ 'paragraph', 'reference', 'blockquote' ] ],
  [ 'paragraph',    lambda { |state, startLine, endLine, silent| RulesBlock::Paragraph.paragraph(state, startLine) } ]
]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ParserBlock

new ParserBlock()



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# File 'lib/motion-markdown-it/parser_block.rb', line 30

def initialize
  # ParserBlock#ruler -> Ruler
  #
  # [[Ruler]] instance. Keep configuration of block rules.
  @ruler = Ruler.new

  RULES.each do |rule|
    @ruler.push(rule[0], rule[1], {alt: (rule[2] || []) })
  end
end

Instance Attribute Details

#ruler ⇒ Object

Returns the value of attribute ruler.



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

def ruler
  @ruler
end

Instance Method Details

#parse(src, md, env, outTokens) ⇒ Object

ParserBlock.parse(src, md, env, outTokens)

Process input string and push block tokens into ‘outTokens`



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# File 'lib/motion-markdown-it/parser_block.rb', line 100

def parse(src, md, env, outTokens)

  return if !src

  state = RulesBlock::StateBlock.new(src, md, env, outTokens)

  tokenize(state, state.line, state.lineMax)
end

#tokenize(state, startLine, endLine, ignored = false) ⇒ Object

Generate tokens for input range



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# File 'lib/motion-markdown-it/parser_block.rb', line 44

def tokenize(state, startLine, endLine, ignored = false)
  rules         = @ruler.getRules('')
  len           = rules.length
  line          = startLine
  hasEmptyLines = false
  maxNesting    = state.md.options[:maxNesting]

  while line < endLine
    state.line = line = state.skipEmptyLines(line)
    break if line >= endLine

    # Termination condition for nested calls.
    # Nested calls currently used for blockquotes & lists
    break if state.sCount[line] < state.blkIndent

    # If nesting level exceeded - skip tail to the end. That's not ordinary
    # situation and we should not care about content.
    if state.level >= maxNesting
      state.line = endLine
      break
    end

    # Try all possible rules.
    # On success, rule should:
    #
    # - update `state.line`
    # - update `state.tokens`
    # - return true
    0.upto(len - 1) do |i|
      ok = rules[i].call(state, line, endLine, false)
      break if ok
    end

    # set state.tight if we had an empty line before current tag
    # i.e. latest empty line should not count
    state.tight = !hasEmptyLines

    # paragraph might "eat" one newline after it in nested lists
    if state.isEmpty(state.line - 1)
      hasEmptyLines = true
    end

    line = state.line

    if line < endLine && state.isEmpty(line)
      hasEmptyLines = true
      line += 1
      state.line = line
    end
  end
end