Module: Erubis::HeaderFooterEnhancer

Included in:
HeaderFooterEruby
Defined in:
lib/erubis/enhancer.rb

Overview

[experimental] allow header and footer in eRuby script

ex.

$ cat ex1.eruby <% def list_items(list) %> <% for item in list %>

  • <%= item %>
    • <% end %> <% end %> 
    $ erubis -s ex1.eruby
_buf = []; def list_items(list)
;   for item in list
; _buf << '<li>'; _buf << ( item ).to_s; _buf << '</li>
';   end
; end
;
_buf.join

## with header and footer
$ cat ex2.eruby
<!--#header:
def list_items(list)
#-->
<%  for item in list %>
<li><%= item %></li>
<%  end %>
<!--#footer:
end
#-->

$ erubis -s -c HeaderFooterEruby ex4.eruby

def list_items(list)
_buf = []; _buf << '
';  for item in list
; _buf << '<li>'; _buf << ( item ).to_s; _buf << '</li>
';  end
; _buf << '
';
_buf.join
end

====================

    this is language-independent.

    Constant Summary collapse 

    /(.*?)(^[ \t]*)?<!--\#(\w+):(.*?)\#-->([ \t]*\r?\n)?/m

    Instance Attribute Summary collapse

    Class Method Summary collapse

    Instance Method Summary collapse

    Instance Attribute Details

    Returns the value of attribute footer.

    

601
602
603
    		 
    # File 'lib/erubis/enhancer.rb', line 601

def footer
  @footer
end

    #header ⇒ Object

    Returns the value of attribute header.

    

601
602
603
    		 
    # File 'lib/erubis/enhancer.rb', line 601

def header
  @header
end

    Class Method Details

    .desc ⇒ Object

    :nodoc:

    

579
580
581
    		 
    # File 'lib/erubis/enhancer.rb', line 579

def self.desc   # :nodoc:
  "allow header/footer in document (ex. '<!--#header: #-->')"
end

    Instance Method Details

    #add_text(src, text) ⇒ Object 

    

585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
    		 
    # File 'lib/erubis/enhancer.rb', line 585

def add_text(src, text)
  m = nil
  text.scan(HEADER_FOOTER_PATTERN) do |txt, lspace, word, content, rspace|
    m = Regexp.last_match
    flag_trim = @trim && lspace && rspace
    super(src, txt)
    content = "#{lspace}#{content}#{rspace}" if flag_trim
    super(src, lspace) if !flag_trim && lspace
    instance_variable_set("@#{word}", content)
    super(src, rspace) if !flag_trim && rspace
  end
  #rest = $' || text                    # ruby1.8
  rest = m ? text[m.end(0)..-1] : text  # ruby1.9
  super(src, rest)
end

    #convert(input) ⇒ Object 

    

603
604
605
606
    		 
    # File 'lib/erubis/enhancer.rb', line 603

def convert(input)
  source = super
  return @src = "#{@header}#{source}#{@footer}"
end