Class: Fira::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/fira/engine.rb

Constant Summary collapse

ID_REGEX = 
/ #([^0-9][a-z_A-Z0-9_\-]+)/
CLASS_REGEX = 
/ \.([^0-9][a-z_A-Z0-9_\-]+)/
QUOTE_REGEX = 
/\S+=["']?(?:.(?!["']?\s+(?:\S+)=|[>"']))+.["']?/
TAG_OPEN_REGEX = 
/<[^\/%!]\w* /
TAG_END_REGEX = 
/([\/]?>)/

Instance Method Summary collapse

Instance Method Details

#insert_quotes(_quotes, tag) ⇒ Object 



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# File 'lib/fira/engine.rb', line 70

def insert_quotes(_quotes, tag)
  space = ''
  space = ' ' if _quotes.length > 0
  quotes = _quotes.join(" ")
  tag.sub(TAG_END_REGEX, space + quotes + '\1')
end

#is_opening_tag?(text) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fira/engine.rb', line 77

def is_opening_tag?(text)
  val = text =~ TAG_OPEN_REGEX
  val.nil? || val > 0 ? false : true
end

#parse_classes(text) ⇒ Object 



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# File 'lib/fira/engine.rb', line 46

def parse_classes(text)
  #find fira class attributes
  classes = text.scan(CLASS_REGEX)

  if classes.empty?
    return text
  end

  #build an HTML class attribute
  att = 'class="'

  classes.each do |cl|
    att += " #{cl[0]}"
    text = text.sub(" ." + cl[0], "")
  end

  att += '"'

  #remove the space before the first class
  att = att.sub(/class=" /, ' class="')

  text.sub(TAG_END_REGEX, att + '\1')
end

#parse_text(text) ⇒ Object 



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# File 'lib/fira/engine.rb', line 14

def parse_text(text)
  output = ""
  tokenizer = HTML::Tokenizer.new(text)
  while token = tokenizer.next

    #if it's an opening tag, analyze it
    if is_opening_tag?(token)

      #remove any quotes
      quotes = token.scan(QUOTE_REGEX)
      no_quotes = token.gsub(QUOTE_REGEX, '')

      #find and replace fira ID attributes
      result = no_quotes.sub(ID_REGEX, ' id="\1"')

      #find and replace fira class attributes
      result = parse_classes(result)

      #add back in the quotes
      output += insert_quotes(quotes, result)

      #find and replace fira data attributes
      output = output.gsub("\$", "data-")

    else
      output += token
    end
  end

  return output
end