Class: Rouge::Lexers::YAML

Inherits:
RegexLexer show all
Defined in:
lib/rouge/lexers/yaml.rb

Constant Summary

Constants inherited from RegexLexer

RegexLexer::MAX_NULL_SCANS

Constants included from Token::Tokens

Token::Tokens::Num, Token::Tokens::Str

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from RegexLexer

#delegate, get_state, #get_state, #goto, #group, #groups, #in_state?, #pop!, #push, #reset!, #reset_stack, #run_callback, #run_rule, #stack, start, start_procs, #state, state, #state?, states, #step, #stream_tokens, #token

Methods inherited from Rouge::Lexer

aliases, all, assert_utf8!, #debug, default_options, demo, demo_file, desc, filenames, find, find_fancy, guess, guess_by_filename, guess_by_mimetype, guess_by_source, guesses, #initialize, lex, #lex, mimetypes, #option, #options, #reset!, #stream_tokens, tag, #tag

Methods included from Token::Tokens

token

Constructor Details

This class inherits a constructor from Rouge::Lexer

Class Method Details

.analyze_text(text) ⇒ Object 



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# File 'lib/rouge/lexers/yaml.rb', line 9

def self.analyze_text(text)
  # look for the %YAML directive
  return 1 if text =~ /\A\s*%YAML/m
end

Instance Method Details

#continue_indent(match) ⇒ Object 



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# File 'lib/rouge/lexers/yaml.rb', line 56

def continue_indent(match)
  debug { "    yaml: continue_indent" }
  @next_indent += match.size
end

#dedent?(level) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rouge/lexers/yaml.rb', line 31

def dedent?(level)
  level < self.indent
end

#indent ⇒ Object 



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# File 'lib/rouge/lexers/yaml.rb', line 26

def indent
  raise 'empty indent stack!' if @indent_stack.empty?
  @indent_stack.last
end

#indent?(level) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rouge/lexers/yaml.rb', line 35

def indent?(level)
  level > self.indent
end

#reset_indent ⇒ Object

reset the indentation levels



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# File 'lib/rouge/lexers/yaml.rb', line 19

def reset_indent
  debug { "    yaml: reset_indent" }
  @indent_stack = [0]
  @next_indent = 0
  @block_scalar_indent = nil
end

#save_indent(match) ⇒ Object

Save a possible indentation level



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# File 'lib/rouge/lexers/yaml.rb', line 40

def save_indent(match)
  @next_indent = match.size
  debug { "    yaml: indent: #{self.indent}/#@next_indent" }
  debug { "    yaml: popping indent stack - before: #@indent_stack" }
  if dedent?(@next_indent)
    @indent_stack.pop while dedent?(@next_indent)
    debug { "    yaml: popping indent stack - after: #@indent_stack" }
    debug { "    yaml: indent: #{self.indent}/#@next_indent" }

    # dedenting to a state not previously indented to is an error
    [match[0...self.indent], match[self.indent..-1]]
  else
    [match, '']
  end
end

#set_indent(opts = {}) ⇒ Object 



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# File 'lib/rouge/lexers/yaml.rb', line 61

def set_indent(opts={})
  if indent < @next_indent
    @indent_stack << @next_indent
  end

  @next_indent += @last_match[0].size unless opts[:implicit]
end