Module: Erubis::InterpolationEnhancer

Included in:
FastEruby, InterpolationEruby
Defined in:
lib/erubis/enhancer.rb

Overview

convert “<h1><%=title%></h1>” into “_buf << %Q`<h1>#title</h1>‘”

this is only for Eruby.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.desc ⇒ Object

:nodoc:



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# File 'lib/erubis/enhancer.rb', line 571

def self.desc   # :nodoc:
  "convert '<p><%=text%></p>' into '_buf << %Q`<p>\#{text}</p>`'"
end

Instance Method Details

#_add_text_to_str(str, text) ⇒ Object 



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# File 'lib/erubis/enhancer.rb', line 639

def _add_text_to_str(str, text)
  return if !text || text.empty?
  text.gsub!(/['\#\\]/, '\\\\\&')
  str << text
end

#add_expr_escaped(str, code) ⇒ Object 



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# File 'lib/erubis/enhancer.rb', line 645

def add_expr_escaped(str, code)
  str << "\#{#{escaped_expr(code)}}"
end

#add_expr_literal(str, code) ⇒ Object 



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# File 'lib/erubis/enhancer.rb', line 649

def add_expr_literal(str, code)
  str << "\#{#{code}}"
end

#add_text(src, text) ⇒ Object 



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# File 'lib/erubis/enhancer.rb', line 628

def add_text(src, text)
  return if !text || text.empty?
  #src << " _buf << %Q`" << text << "`;"
  if text[-1] == ?\n
    text[-1] = "\\n"
    src << " _buf << %Q`" << text << "`\n"
  else
    src << " _buf << %Q`" << text << "`;"
  end
end

#convert_input(src, input) ⇒ Object 



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# File 'lib/erubis/enhancer.rb', line 575

def convert_input(src, input)
  pat = @pattern
  regexp = pat.nil? || pat == '<% %>' ? Basic::Converter::DEFAULT_REGEXP : pattern_regexp(pat)
  pos = 0
  is_bol = true     # is beginning of line
  str = ''
  input.scan(regexp) do |indicator, code, rspace|
    match = Regexp.last_match()
    len  = match.begin(0) - pos
    text = input[pos, len]
    pos  = match.end(0)
    ch   = indicator ? indicator[0] : nil
    lspace = ch == ?= ? nil : detect_spaces_at_bol(text, is_bol)
    is_bol = rspace ? true : false
    _add_text_to_str(str, text)
    ## * when '<%= %>', do nothing
    ## * when '<% %>' or '<%# %>', delete spaces iff only spaces are around '<% %>'
    if ch == ?=              # <%= %>
      str << lspace if lspace
      add_expr(str, code, indicator)
      str << rspace if rspace
    elsif ch == ?\#          # <%# %>
      n = code.count("\n") + (rspace ? 1 : 0)
      if @trim && lspace && rspace
        add_text(src, str)
        str = ''
        add_stmt(src, "\n" * n)
      else
        str << lspace if lspace
        add_text(src, str)
        str = ''
        add_stmt(src, "\n" * n)
        str << rspace if rspace
      end
    else                     # <% %>
      if @trim && lspace && rspace
        add_text(src, str)
        str = ''
        add_stmt(src, "#{lspace}#{code}#{rspace}")
      else
        str << lspace if lspace
        add_text(src, str)
        str = ''
        add_stmt(src, code)
        str << rspace if rspace
      end
    end
  end
  rest = $' || input     # add input when no matched
  _add_text_to_str(str, rest)
  add_text(src, str)
end