Class: MarkdownIt::RulesCore::Normalize

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

Constant Summary collapse

TABS_SCAN_RE = 
/[\n\t]/
NEWLINES_RE = 
/\r[\n\u0085]|[\u2424\u2028\u0085]/
NULL_RE = 
/\u0000/

Class Method Summary collapse

Class Method Details

.inline(state) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/normalize.rb', line 13

def self.inline(state)
  # Normalize newlines
  str = state.src.gsub(NEWLINES_RE, "\n")

  # Replace NULL characters
  str = str.gsub(NULL_RE, '\uFFFD')

  # Replace tabs with proper number of spaces (1..4)
  if str.include?("\t")
    lineStart  = 0
    lastTabPos = 0

    str = str.gsub(TABS_SCAN_RE) do
      md      = Regexp.last_match
      match   = md.to_s
      offset  = md.begin(0)
      if str.charCodeAt(offset) == 0x0A
        lineStart   = offset + 1
        lastTabPos  = 0
        next match
      end
      result      = '    '.slice_to_end((offset - lineStart - lastTabPos) % 4)
      lastTabPos  = offset - lineStart + 1
      result
    end
  end

  state.src = str
end