Class: CodeRay::Scanners::Groovy

Inherits:
Java
  • Object
show all
Includes:
CodeRay::Streamable
Defined in:
lib/coderay/scanners/groovy.rb

Constant Summary collapse

GROOVY_KEYWORDS =

TODO: Check this!

%w[
  as assert def in
]
KEYWORDS_EXPECTING_VALUE = 
WordList.new.add %w[
  case instanceof new return throw typeof while as assert in
]
GROOVY_MAGIC_VARIABLES = 
%w[ it ]
IDENT_KIND = 
Java::IDENT_KIND.dup.
add(GROOVY_KEYWORDS, :keyword).
add(GROOVY_MAGIC_VARIABLES, :local_variable)
ESCAPE = 
/ [bfnrtv$\n\\'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} /x
UNICODE_ESCAPE =

no 4-byte unicode chars? U8

/ u[a-fA-F0-9]{4} /x
REGEXP_ESCAPE = 
/ [bfnrtv\n\\'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} | \d | [bBdDsSwW\/] /x
STRING_CONTENT_PATTERN =

TODO: interpretation inside ‘, “, /

{
  "'" => /(?>\\[^\\'\n]+|[^\\'\n]+)+/,
  '"' => /[^\\$"\n]+/,
  "'''" => /(?>[^\\']+|'(?!''))+/,
  '"""' => /(?>[^\\$"]+|"(?!""))+/,
  '/' => /[^\\$\/\n]+/,
}

Constants inherited from Java

Java::CONSTANTS, Java::DIRECTIVES, Java::IDENT, Java::KEYWORDS, Java::MAGIC_VARIABLES, Java::RESERVED, Java::TYPES

Constants inherited from Scanner

Scanner::DEFAULT_OPTIONS, Scanner::KINDS_NOT_LOC, Scanner::ScanError

Instance Method Summary collapse

Methods inherited from Scanner

#column, #each, file_extension, #initialize, #line, #marshal_dump, #marshal_load, normify, #reset, streamable?, #streaming?, #string=, #tokenize, #tokens

Methods included from Plugin

#helper, #included, #plugin_host, #plugin_id, #register_for, #title

Constructor Details

This class inherits a constructor from CodeRay::Scanners::Scanner

Instance Method Details

#scan_tokens(tokens, options) ⇒ Object 



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# File 'lib/coderay/scanners/groovy.rb', line 37

def scan_tokens tokens, options

  state = :initial
  inline_block_stack = []
  inline_block_paren_depth = nil
  string_delimiter = nil
  import_clause = class_name_follows = last_token = after_def = false
  value_expected = true

  until eos?

    kind = nil
    match = nil
    
    case state

    when :initial

      if match = scan(/ \s+ | \\\n /x)
        tokens << [match, :space]
        if match.index ?\n
          import_clause = after_def = false
          value_expected = true unless value_expected
        end
        next
      
      elsif scan(%r! // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !mx)
        value_expected = true
        after_def = false
        kind = :comment
      
      elsif bol? && scan(/ \#!.* /x)
        kind = :doctype
      
      elsif import_clause && scan(/ (?!as) #{IDENT} (?: \. #{IDENT} )* (?: \.\* )? /ox)
        after_def = value_expected = false
        kind = :include
      
      elsif match = scan(/ #{IDENT} | \[\] /ox)
        kind = IDENT_KIND[match]
        value_expected = (kind == :keyword) && KEYWORDS_EXPECTING_VALUE[match]
        if last_token == '.'
          kind = :ident
        elsif class_name_follows
          kind = :class
          class_name_follows = false
        elsif after_def && check(/\s*[({]/)
          kind = :method
          after_def = false
        elsif kind == :ident && last_token != '?' && check(/:/)
          kind = :key
        else
          class_name_follows = true if match == 'class' || (import_clause && match == 'as')
          import_clause = match == 'import'
          after_def = true if match == 'def'
        end
      
      elsif scan(/;/)
        import_clause = after_def = false
        value_expected = true
        kind = :operator
      
      elsif scan(/\{/)
        class_name_follows = after_def = false
        value_expected = true
        kind = :operator
        if !inline_block_stack.empty?
          inline_block_paren_depth += 1
        end
      
      # TODO: ~'...', ~"..." and ~/.../ style regexps
      elsif match = scan(/ \.\.<? | \*?\.(?!\d)@? | \.& | \?:? | [,?:(\[] | -[->] | \+\+ |
          && | \|\| | \*\*=? | ==?~ | <=?>? | [-+*%^~&|>=!]=? | <<<?=? | >>>?=? /x)
        value_expected = true
        value_expected = :regexp if match == '~'
        after_def = false
        kind = :operator
      
      elsif match = scan(/ [)\]}] /x)
        value_expected = after_def = false
        if !inline_block_stack.empty? && match == '}'
          inline_block_paren_depth -= 1
          if inline_block_paren_depth == 0  # closing brace of inline block reached
            tokens << [match, :inline_delimiter]
            tokens << [:close, :inline]
            state, string_delimiter, inline_block_paren_depth = inline_block_stack.pop
            next
          end
        end
      
      elsif check(/[\d.]/)
        after_def = value_expected = false
        if scan(/0[xX][0-9A-Fa-f]+/)
          kind = :hex
        elsif scan(/(?>0[0-7]+)(?![89.eEfF])/)
          kind = :oct
        elsif scan(/\d+[fFdD]|\d*\.\d+(?:[eE][+-]?\d+)?[fFdD]?|\d+[eE][+-]?\d+[fFdD]?/)
          kind = :float
        elsif scan(/\d+[lLgG]?/)
          kind = :integer
        end

      elsif match = scan(/'''|"""/)
        after_def = value_expected = false
        state = :multiline_string
        tokens << [:open, :string]
        string_delimiter = match
        kind = :delimiter
      
      # TODO: record.'name'
      elsif match = scan(/["']/)
        after_def = value_expected = false
        state = match == '/' ? :regexp : :string
        tokens << [:open, state]
        string_delimiter = match
        kind = :delimiter

      elsif value_expected && (match = scan(/\//))
        after_def = value_expected = false
        tokens << [:open, :regexp]
        state = :regexp
        string_delimiter = '/'
        kind = :delimiter

      elsif scan(/ @ #{IDENT} /ox)
        after_def = value_expected = false
        kind = :annotation

      elsif scan(/\//)
        after_def = false
        value_expected = true
        kind = :operator
      
      else
        getch
        kind = :error

      end

    when :string, :regexp, :multiline_string
      if scan(STRING_CONTENT_PATTERN[string_delimiter])
        kind = :content
        
      elsif match = scan(state == :multiline_string ? /'''|"""/ : /["'\/]/)
        tokens << [match, :delimiter]
        if state == :regexp
          # TODO: regexp modifiers? s, m, x, i?
          modifiers = scan(/[ix]+/)
          tokens << [modifiers, :modifier] if modifiers && !modifiers.empty?
        end
        state = :string if state == :multiline_string
        tokens << [:close, state]
        string_delimiter = nil
        after_def = value_expected = false
        state = :initial
        next
      
      elsif (state == :string || state == :multiline_string) &&
          (match = scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /mox))
        if string_delimiter[0] == ?' && !(match == "\\\\" || match == "\\'")
          kind = :content
        else
          kind = :char
        end
      elsif state == :regexp && scan(/ \\ (?: #{REGEXP_ESCAPE} | #{UNICODE_ESCAPE} ) /mox)
        kind = :char
      
      elsif match = scan(/ \$ #{IDENT} /mox)
        tokens << [:open, :inline]
        tokens << ['$', :inline_delimiter]
        match = match[1..-1]
        tokens << [match, IDENT_KIND[match]]
        tokens << [:close, :inline]
        next
      elsif match = scan(/ \$ \{ /x)
        tokens << [:open, :inline]
        tokens << ['${', :inline_delimiter]
        inline_block_stack << [state, string_delimiter, inline_block_paren_depth]
        inline_block_paren_depth = 1
        state = :initial
        next
      
      elsif scan(/ \$ /mx)
        kind = :content
      
      elsif scan(/ \\. /mx)
        kind = :content
      
      elsif scan(/ \\ | \n /x)
        tokens << [:close, state]
        kind = :error
        after_def = value_expected = false
        state = :initial
      
      else
        raise_inspect "else case \" reached; %p not handled." % peek(1), tokens
      end

    else
      raise_inspect 'Unknown state', tokens

    end

    match ||= matched
    if $DEBUG and not kind
      raise_inspect 'Error token %p in line %d' %
        [[match, kind], line], tokens
    end
    raise_inspect 'Empty token', tokens unless match
    
    last_token = match unless [:space, :comment, :doctype].include? kind
    
    tokens << [match, kind]

  end

  if [:multiline_string, :string, :regexp].include? state
    tokens << [:close, state]
  end

  tokens
end