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module CodeRay
module Encoders
# Counts the LoC (Lines of Code). Returns an Integer >= 0.
#
# Alias: +loc+
#
# Everything that is not comment, markup, doctype/shebang, or an empty line,
# is considered to be code.
#
# For example,
# * HTML files not containing JavaScript have 0 LoC
# * in a Java class without comments, LoC is the number of non-empty lines
#
# A Scanner class should define the token kinds that are not code in the
# KINDS_NOT_LOC constant, which defaults to [:comment, :doctype].
class LinesOfCode < Encoder
register_for :lines_of_code
NON_EMPTY_LINE = /^\s*\S.*$/
protected
def setup options
@out = 0
end
def compile tokens, options
if scanner = tokens.scanner
kinds_not_loc = scanner.class::KINDS_NOT_LOC
else
warn "Tokens have no associated scanner, counting all nonempty lines." if $VERBOSE
kinds_not_loc = CodeRay::Scanners::Scanner::KINDS_NOT_LOC
end
code = tokens.token_kind_filter :exclude => kinds_not_loc
@out = code.to_s.scan(NON_EMPTY_LINE).size
end
def finish options
@out
end
end
end
end
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