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 lib/erubis/tiny.rb, line 20
20:     def initialize(input=nil)
21:       @src = convert(input) if input
22:     end

Public Instance methods

convert(input)

[Source]

    # File lib/erubis/tiny.rb, line 27
27:     def convert(input)
28:       src = "_buf = '';"           # preamble
29:       pos = 0
30:       input.scan(EMBEDDED_PATTERN) do |indicator, code|
31:         match = Regexp.last_match
32:         len   = match.begin(0) - pos
33:         text  = input[pos, len]
34:         pos   = match.end(0)
35:         #src << " _buf << '" << escape_text(text) << "';"
36:         text.gsub!(/['\\]/, '\\\\\&')
37:         src << " _buf << '" << text << "';" unless text.empty?
38:         if !indicator              # <% %>
39:           src << code << ";"
40:         elsif indicator == '#'     # <%# %>
41:           src << ("\n" * code.count("\n"))
42:         else                       # <%= %>
43:           src << " _buf << (" << code << ").to_s;"
44:         end
45:       end
46:       #rest = $' || input                        # ruby1.8
47:       rest = pos == 0 ? input : input[pos..-1]   # ruby1.9
48:       #src << " _buf << '" << escape_text(rest) << "';"
49:       rest.gsub!(/['\\]/, '\\\\\&')
50:       src << " _buf << '" << rest << "';" unless rest.empty?
51:       src << "\n_buf.to_s\n"       # postamble
52:       return src
53:     end

evaluate(_context=Object.new)

[Source]

    # File lib/erubis/tiny.rb, line 63
63:     def evaluate(_context=Object.new)
64:       if _context.is_a?(Hash)
65:         _obj = Object.new
66:         _context.each do |k, v| _obj.instance_variable_set("@#{k}", v) end
67:         _context = _obj
68:       end
69:       _context.instance_eval @src
70:     end

result(_binding=TOPLEVEL_BINDING)

def escape_text(text)

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

end

[Source]

    # File lib/erubis/tiny.rb, line 59
59:     def result(_binding=TOPLEVEL_BINDING)
60:       eval @src, _binding
61:     end