Class: Erubis::TinyEruby

tiny and the simplest implementation of eRuby

ex.

  eruby = TinyEruby.new(File.read('example.rhtml'))
  print eruby.src                 # print ruby code
  print eruby.result(binding())   # eval ruby code with Binding object
  print eruby.evalute(context)    # eval ruby code with context object

Methods

convert evaluate new result

Constants

EMBEDDED_PATTERN = /<%(=+|\#)?(.*?)-?%>/m

Attributes

src [R]

Public Class methods

new(input=nil)

[Source]

# File erubis/tiny.rb, line 19
    def initialize(input=nil)
      @src = convert(input) if input
    end

Public Instance methods

convert(input)

[Source]

# File erubis/tiny.rb, line 26
    def convert(input)
      src = "_buf = '';"           # preamble
      pos = 0
      input.scan(EMBEDDED_PATTERN) do |indicator, code|
        m = Regexp.last_match
        text = input[pos...m.begin(0)]
        pos  = m.end(0)
        #src << " _buf << '" << escape_text(text) << "';"
        text.gsub!(/['\\]/, '\\\\\&')
        src << " _buf << '" << text << "';" unless text.empty?
        if !indicator              # <% %>
          src << code << ";"
        elsif indicator == '#'     # <%# %>
          src << ("\n" * code.count("\n"))
        else                       # <%= %>
          src << " _buf << (" << code << ").to_s;"
        end
      end
      #rest = $' || input                        # ruby1.8
      rest = pos == 0 ? input : input[pos..-1]   # ruby1.9
      #src << " _buf << '" << escape_text(rest) << "';"
      rest.gsub!(/['\\]/, '\\\\\&')
      src << " _buf << '" << rest << "';" unless rest.empty?
      src << "\n_buf.to_s\n"       # postamble
      return src
    end

evaluate(_context=Object.new)

[Source]

# File erubis/tiny.rb, line 61
    def evaluate(_context=Object.new)
      if _context.is_a?(Hash)
        _obj = Object.new
        _context.each do |k, v| _obj.instance_variable_set("@#{k}", v) end
        _context = _obj
      end
      _context.instance_eval @src
    end

result(_binding=TOPLEVEL_BINDING)

def escape_text(text)

  return text.gsub!(/['\\]/, '\\\\\&') || text

end

[Source]

# File erubis/tiny.rb, line 57
    def result(_binding=TOPLEVEL_BINDING)
      eval @src, _binding
    end