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module CodeRay
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module Scanners
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load :html
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load :ruby
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# Nitro XHTML Scanner
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#
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# $Id$
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class NitroXHTML < Scanner
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include Streamable
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register_for :nitro_xhtml
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NITRO_RUBY_BLOCK = /
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<\?r
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(?>
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[^\?]*
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(?> \?(?!>) [^\?]* )*
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)
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(?: \?> )?
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<ruby>
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(?>
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[^<]*
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(?> <(?!\/ruby>) [^<]* )*
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)
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(?: <\/ruby> )?
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<%
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(?>
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[^%]*
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(?> %(?!>) [^%]* )*
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)
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(?: %> )?
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/mx
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NITRO_VALUE_BLOCK = /
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\#
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(?:
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\{
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[^{}]*
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(?>
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\{ [^}]* \}
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(?> [^{}]* )
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)*
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\}?
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| \| [^|]* \|?
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| \( [^)]* \)?
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| \[ [^\]]* \]?
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| \\ [^\\]* \\?
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)
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/x
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NITRO_ENTITY = /
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% (?: \#\d+ | \w+ ) ;
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/
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START_OF_RUBY = /
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(?=[<\#%])
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< (?: \?r | % | ruby> )
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| \# [{(|]
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| % (?: \#\d+ | \w+ ) ;
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/x
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CLOSING_PAREN = Hash.new do |h, p|
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h[p] = p
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end.update( {
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'(' => ')',
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'[' => ']',
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'{' => '}',
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} )
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private
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def setup
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@ruby_scanner = CodeRay.scanner :ruby, :tokens => @tokens, :keep_tokens => true
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@html_scanner = CodeRay.scanner :html, :tokens => @tokens, :keep_tokens => true, :keep_state => true
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end
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def reset_instance
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super
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@html_scanner.reset
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end
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def scan_tokens tokens, options
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until eos?
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if (match = scan_until(/(?=#{START_OF_RUBY})/o) || scan_until(/\z/)) and not match.empty?
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@html_scanner.tokenize match
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elsif match = scan(/#{NITRO_VALUE_BLOCK}/o)
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start_tag = match[0,2]
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delimiter = CLOSING_PAREN[start_tag[1,1]]
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end_tag = match[-1,1] == delimiter ? delimiter : ''
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tokens << [:open, :inline]
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tokens << [start_tag, :inline_delimiter]
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code = match[start_tag.size .. -1 - end_tag.size]
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@ruby_scanner.tokenize code
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tokens << [end_tag, :inline_delimiter] unless end_tag.empty?
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tokens << [:close, :inline]
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elsif match = scan(/#{NITRO_RUBY_BLOCK}/o)
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start_tag = '<?r'
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end_tag = match[-2,2] == '?>' ? '?>' : ''
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tokens << [:open, :inline]
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tokens << [start_tag, :inline_delimiter]
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code = match[start_tag.size .. -(end_tag.size)-1]
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@ruby_scanner.tokenize code
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tokens << [end_tag, :inline_delimiter] unless end_tag.empty?
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tokens << [:close, :inline]
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elsif entity = scan(/#{NITRO_ENTITY}/o)
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tokens << [entity, :entity]
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elsif scan(/%/)
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tokens << [matched, :error]
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else
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raise_inspect 'else-case reached!', tokens
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end
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end
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tokens
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end
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end
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end
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end
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