88 lines
2.5 KiB
Ruby
88 lines
2.5 KiB
Ruby
module CodeRay
|
|
|
|
# = Duo
|
|
#
|
|
# $Id: scanner.rb 123 2006-03-21 14:46:34Z murphy $
|
|
#
|
|
# A Duo is a convenient way to use CodeRay. You just create a Duo,
|
|
# giving it a lang (language of the input code) and a format (desired
|
|
# output format), and call Duo#highlight with the code.
|
|
#
|
|
# Duo makes it easy to re-use both scanner and encoder for a repetitive
|
|
# task. It also provides a very easy interface syntax:
|
|
#
|
|
# require 'coderay'
|
|
# CodeRay::Duo[:python, :div].highlight 'import this'
|
|
#
|
|
# Until you want to do uncommon things with CodeRay, I recommend to use
|
|
# this method, since it takes care of everything.
|
|
class Duo
|
|
|
|
attr_accessor :lang, :format, :options
|
|
|
|
# Create a new Duo, holding a lang and a format to highlight code.
|
|
#
|
|
# simple:
|
|
# CodeRay::Duo[:ruby, :page].highlight 'bla 42'
|
|
#
|
|
# streaming:
|
|
# CodeRay::Duo[:ruby, :page].highlight 'bar 23', :stream => true
|
|
#
|
|
# with options:
|
|
# CodeRay::Duo[:ruby, :html, :hint => :debug].highlight '????::??'
|
|
#
|
|
# alternative syntax without options:
|
|
# CodeRay::Duo[:ruby => :statistic].encode 'class << self; end'
|
|
#
|
|
# alternative syntax with options:
|
|
# CodeRay::Duo[{ :ruby => :statistic }, :do => :something].encode 'abc'
|
|
#
|
|
# The options are forwarded to scanner and encoder
|
|
# (see CodeRay.get_scanner_options).
|
|
def initialize lang = nil, format = nil, options = {}
|
|
if format == nil and lang.is_a? Hash and lang.size == 1
|
|
@lang = lang.keys.first
|
|
@format = lang[@lang]
|
|
else
|
|
@lang = lang
|
|
@format = format
|
|
end
|
|
@options = options
|
|
end
|
|
|
|
class << self
|
|
# To allow calls like Duo[:ruby, :html].highlight.
|
|
alias [] new
|
|
end
|
|
|
|
# The scanner of the duo. Only created once.
|
|
def scanner
|
|
@scanner ||= CodeRay.scanner @lang, CodeRay.get_scanner_options(@options)
|
|
end
|
|
|
|
# The encoder of the duo. Only created once.
|
|
def encoder
|
|
@encoder ||= CodeRay.encoder @format, @options
|
|
end
|
|
|
|
# Tokenize and highlight the code using +scanner+ and +encoder+.
|
|
#
|
|
# If the :stream option is set, the Duo will go into streaming mode,
|
|
# saving memory for the cost of time.
|
|
def encode code, options = { :stream => false }
|
|
stream = options.delete :stream
|
|
options = @options.merge options
|
|
if stream
|
|
encoder.encode_stream(code, @lang, options)
|
|
else
|
|
scanner.code = code
|
|
encoder.encode_tokens(scanner.tokenize, options)
|
|
end
|
|
end
|
|
alias highlight encode
|
|
|
|
end
|
|
|
|
end
|
|
|