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module CodeRay
module Scanners
load :java
# Scanner for Groovy.
class Groovy < Java
include Streamable
register_for :groovy
# TODO: check list of keywords
GROOVY_KEYWORDS = %w[
as assert def in
] # :nodoc:
KEYWORDS_EXPECTING_VALUE = WordList.new.add %w[
case instanceof new return throw typeof while as assert in
] # :nodoc:
GROOVY_MAGIC_VARIABLES = %w[ it ] # :nodoc:
IDENT_KIND = Java::IDENT_KIND.dup.
add(GROOVY_KEYWORDS, :keyword).
add(GROOVY_MAGIC_VARIABLES, :local_variable) # :nodoc:
ESCAPE = / [bfnrtv$\n\\'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} /x # :nodoc:
UNICODE_ESCAPE = / u[a-fA-F0-9]{4} /x # :nodoc: no 4-byte unicode chars? U[a-fA-F0-9]{8}
REGEXP_ESCAPE = / [bfnrtv\n\\'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} | \d | [bBdDsSwW\/] /x # :nodoc:
# TODO: interpretation inside ', ", /
STRING_CONTENT_PATTERN = {
"'" => /(?>\\[^\\'\n]+|[^\\'\n]+)+/,
'"' => /[^\\$"\n]+/,
"'''" => /(?>[^\\']+|'(?!''))+/,
'"""' => /(?>[^\\$"]+|"(?!""))+/,
'/' => /[^\\$\/\n]+/,
} # :nodoc:
protected
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
kind = :operator
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' syntax
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 $CODERAY_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
end
end
end
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