145 lines
4 KiB
Ruby
145 lines
4 KiB
Ruby
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##
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## $Release: 2.6.5 $
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## copyright(c) 2006-2009 kuwata-lab.com all rights reserved.
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##
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module Erubis
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##
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## tiny and the simplest implementation of eRuby
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##
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## ex.
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## eruby = TinyEruby.new(File.read('example.rhtml'))
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## print eruby.src # print ruby code
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## print eruby.result(binding()) # eval ruby code with Binding object
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## print eruby.evalute(context) # eval ruby code with context object
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##
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class TinyEruby
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def initialize(input=nil)
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@src = convert(input) if input
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end
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attr_reader :src
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EMBEDDED_PATTERN = /<%(=+|\#)?(.*?)-?%>/m
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def convert(input)
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src = "_buf = '';" # preamble
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pos = 0
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input.scan(EMBEDDED_PATTERN) do |indicator, code|
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m = Regexp.last_match
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text = input[pos...m.begin(0)]
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pos = m.end(0)
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#src << " _buf << '" << escape_text(text) << "';"
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text.gsub!(/['\\]/, '\\\\\&')
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src << " _buf << '" << text << "';" unless text.empty?
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if !indicator # <% %>
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src << code << ";"
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elsif indicator == '#' # <%# %>
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src << ("\n" * code.count("\n"))
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else # <%= %>
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src << " _buf << (" << code << ").to_s;"
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end
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end
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#rest = $' || input # ruby1.8
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rest = pos == 0 ? input : input[pos..-1] # ruby1.9
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#src << " _buf << '" << escape_text(rest) << "';"
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rest.gsub!(/['\\]/, '\\\\\&')
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src << " _buf << '" << rest << "';" unless rest.empty?
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src << "\n_buf.to_s\n" # postamble
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return src
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end
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#def escape_text(text)
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# return text.gsub!(/['\\]/, '\\\\\&') || text
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#end
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def result(_binding=TOPLEVEL_BINDING)
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eval @src, _binding
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end
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def evaluate(_context=Object.new)
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if _context.is_a?(Hash)
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_obj = Object.new
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_context.each do |k, v| _obj.instance_variable_set("@#{k}", v) end
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_context = _obj
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end
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_context.instance_eval @src
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end
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end
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module PI
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end
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class PI::TinyEruby
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def initialize(input=nil, options={})
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@escape = options[:escape] || 'Erubis::XmlHelper.escape_xml'
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@src = convert(input) if input
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end
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attr_reader :src
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EMBEDDED_PATTERN = /(^[ \t]*)?<\?rb(\s.*?)\?>([ \t]*\r?\n)?|@(!+)?\{(.*?)\}@/m
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def convert(input)
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src = "_buf = '';" # preamble
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pos = 0
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input.scan(EMBEDDED_PATTERN) do |lspace, stmt, rspace, indicator, expr|
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match = Regexp.last_match
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len = match.begin(0) - pos
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text = input[pos, len]
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pos = match.end(0)
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#src << " _buf << '" << escape_text(text) << "';"
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text.gsub!(/['\\]/, '\\\\\&')
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src << " _buf << '" << text << "';" unless text.empty?
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if stmt # <?rb ... ?>
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if lspace && rspace
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src << "#{lspace}#{stmt}#{rspace}"
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else
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src << " _buf << '" << lspace << "';" if lspace
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src << stmt << ";"
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src << " _buf << '" << rspace << "';" if rspace
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end
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else # ${...}, $!{...}
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if !indicator
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src << " _buf << " << @escape << "(" << expr << ");"
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elsif indicator == '!'
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src << " _buf << (" << expr << ").to_s;"
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end
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end
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end
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#rest = $' || input # ruby1.8
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rest = pos == 0 ? input : input[pos..-1] # ruby1.9
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#src << " _buf << '" << escape_text(rest) << "';"
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rest.gsub!(/['\\]/, '\\\\\&')
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src << " _buf << '" << rest << "';" unless rest.empty?
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src << "\n_buf.to_s\n" # postamble
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return src
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end
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#def escape_text(text)
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# return text.gsub!(/['\\]/, '\\\\\&') || text
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#end
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def result(_binding=TOPLEVEL_BINDING)
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eval @src, _binding
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end
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def evaluate(_context=Object.new)
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if _context.is_a?(Hash)
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_obj = Object.new
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_context.each do |k, v| _obj.instance_variable_set("@#{k}", v) end
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_context = _obj
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end
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_context.instance_eval @src
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end
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end
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end
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