Class: Reflexive::CodeRayRubyScanner

Inherits:
CodeRay::Scanners::Scanner
  • Object
show all
Defined in:
lib/reflexive/coderay_ruby_scanner.rb

Overview

TODO Heredocs in args are royally screwed

Constant Summary collapse

SCANNER_EVENT_TO_CODERAY_TOKEN = 
{
        :kw => :reserved,
        :nl => :space,
        :sp => :space,
        :ignored_nl => :space,
        # :tstring_beg => :delimiter,
        # :tstring_end => :delimiter,
        :tstring_content => :content,
        # Кipper reports rbrace always, CodeRay differentiates
        # between blocks, and rbraces in string interpol
        # :embexpr_beg => :inline_delimiter,
        :lbrace => :operator,
        :rbrace => :operator,
        :lparen => :operator,
        :rparen => :operator,
        :lbracket => :operator,
        :rbracket => :operator,
        :comma => :operator,
        :op => :operator,
        :int => :integer,
        :period => :operator,
        :const => :constant,
        :cvar => :class_variable,
        :ivar => :instance_variable,
        :gvar => :global_variable,
        :embvar => :escape, # ?
        :embdoc_beg => :comment,
        :embdoc => :comment,
        :embdoc_end => :comment,
        :qwords_beg => :content,
        :words_sep => :content,
        :CHAR => :integer,
        # * :constant => :class, CodeRay reports `class` token for
        #   class def, we report just `const` always
        # * Ripper doesn't have `char` event
        # * `42 if true` - CodeRay reports `pre_constant`
}

Instance Method Summary collapse

Instance Method Details

#coderay_tokens(scanner_events) ⇒ Object 



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# File 'lib/reflexive/coderay_ruby_scanner.rb', line 47

def coderay_tokens(scanner_events)
  @coderay_tokens = []
  in_backtick = false
  in_symbol = false
  in_embexpr_nesting = 0

  scanner_events.each do |scanner_event|
    token_val, event, tags =
            ReflexiveRipper.destruct_scanner_event(scanner_event)
    
    #        if event == :meta_scope
    #          @coderay_tokens << [token_val, event]
    #          next
    #        end
    #
    #        if token_val == :method_call
    #          @coderay_tokens << [token_val, event, tags]
    #          next
    #        end

    ripper_token = SCANNER_EVENT_TO_CODERAY_TOKEN[event.to_sym] || event.to_sym
    if in_backtick && event == :lparen
      @coderay_tokens.pop # remove [:open, :shell], [token_val, :delimiter]
      @coderay_tokens.pop # and replace with method declaration
      @coderay_tokens << ["`", :method]
      @coderay_tokens << ["(", :operator]
    elsif in_embexpr_nesting > 0 && event == :rbrace
      @coderay_tokens << [token_val, :inline_delimiter]
      @coderay_tokens << [:close, :inline]
      in_embexpr_nesting -= 1
    elsif event == :embexpr_beg
      @coderay_tokens << [:open, :inline]
      @coderay_tokens << [token_val, :inline_delimiter]
      in_embexpr_nesting += 1
    elsif in_symbol && [:ident, :const, :ivar, :cvar, :gvar, :op, :kw].include?(event)
      # parse.y
      #
      # symbol		: tSYMBEG sym
      #
      #          sym		: fname
      #              | tIVAR
      #              | tGVAR
      #              | tCVAR
      #              ;
      #
      #          fname		: tIDENTIFIER
      #              | tCONSTANT
      #              | tFID
      #              | op
      #                  {
      #                lex_state = EXPR_ENDFN;
      #                $$ = $1;
      #                  }
      #              | reswords
      #                  {
      #                lex_state = EXPR_ENDFN;
      #                  /*%%%*/
      #                $$ = $<id>1;
      #                  /*%
      #                $$ = $1;
      #                  %*/
      #                  }
      #              ;
      @coderay_tokens << [token_val, :content]
      @coderay_tokens.last << tags if tags
      @coderay_tokens << [:close, :symbol]
      in_symbol = false
    elsif ripper_token == :regexp_beg
      @coderay_tokens << [:open, :regexp]
      @coderay_tokens << [token_val, :delimiter]
    elsif ripper_token == :regexp_end
      @coderay_tokens << [token_val, :delimiter]
      @coderay_tokens << [:close, :regexp]
    elsif ripper_token == :tstring_beg
      @coderay_tokens << [:open, :string]
      @coderay_tokens << [token_val, :delimiter]
    elsif ripper_token == :tstring_end
      @coderay_tokens << [token_val, :delimiter]
      if in_backtick
        @coderay_tokens << [:close, :shell]
        in_backtick = false
      elsif in_symbol
        @coderay_tokens << [:close, :symbol]
        in_symbol = false
      else
        @coderay_tokens << [:close, :string]
      end
    elsif ripper_token == :symbeg
      if in_symbol # nesting not supported
        @coderay_tokens << [token_val, :symbol]
      else
        @coderay_tokens << [:open, :symbol]
        @coderay_tokens << [token_val, :delimiter]
        in_symbol = true
      end
    elsif ripper_token == :backtick
      if in_backtick # nesting not supported 
        @coderay_tokens << [token_val, :operator]
      else
        @coderay_tokens << [:open, :shell]
        @coderay_tokens << [token_val, :delimiter]
        in_backtick = true
      end
    else
      if @coderay_tokens.size > 0 && @coderay_tokens[-1][1] == ripper_token
        @coderay_tokens.last[0] << token_val # same consequent tokens get squeezed
      else
        @coderay_tokens << [token_val, ripper_token]
        @coderay_tokens.last << tags if tags
      end
    end
  end

  tokens = @coderay_tokens
  # tokens = squeeze_constants(tokens)
  # tokens = inject_constant_tags(tokens)
  tokens = inject_load_path_tags(tokens)
  tokens
end

#inject_constant_tags(coderay_tokens) ⇒ Object 



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# File 'lib/reflexive/coderay_ruby_scanner.rb', line 187

def inject_constant_tags(coderay_tokens)
  scope = nil
  coderay_tokens.each do |token|
    if token[1] == :constant
      token << { :scope => scope }
    elsif token[0] == :method_call &&
            token[1] == :open
      begin
      token[2][:scope] = scope
      rescue Exception
        r(token)
        end
      
    elsif token[1] == :meta_scope
      scope = token[0]
      scope = nil if scope.empty?
    end
  end
  coderay_tokens
end

#inject_load_path_tags(coderay_tokens) ⇒ Object 



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# File 'lib/reflexive/coderay_ruby_scanner.rb', line 208

def inject_load_path_tags(coderay_tokens)
  state = nil
  coderay_tokens.each do |token|
    value, type = token
    if state == nil && type == :ident && value =~ /\A(require|load)\z/
      state = :ident
    elsif state == :ident && [ :operator, :space ].include?(type)
      # skip
    elsif state == :ident && value == :open && type == :string
      state = :open_string
    elsif state == :open_string && type == :delimiter
      # skip
    elsif state == :open_string && type == :content
      token << { :load_path => true }
    else
      state = nil
    end
  end
  coderay_tokens
end

#scan_tokens(tokens, options) ⇒ Object 



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# File 'lib/reflexive/coderay_ruby_scanner.rb', line 229

def scan_tokens(tokens, options)
  parser = ReflexiveRipper.new(code)
  parser.parse
  tokens.replace(coderay_tokens(parser.scanner_events))
  tokens
end

#squeeze_constants(coderay_tokens) ⇒ Object 



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# File 'lib/reflexive/coderay_ruby_scanner.rb', line 167

def squeeze_constants(coderay_tokens)
  tokens = []
  coderay_tokens.reverse_each do |token|
    if tokens.size > 0
      if token[1] == :constant &&
        tokens[-1][1] == :constant
        tokens[-1][0] = "#{ token[0] }#{ tokens[-1][0] }"
      elsif token == [ "::", :operator ] &&
        tokens[-1][1] == :constant
        tokens[-1][0] = "#{ token[0] }#{ tokens[-1][0] }"
      else
        tokens << token
      end
    else
      tokens << token
    end
  end
  tokens.reverse
end