Forum: Ruby tagz-4.6.0

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1bac2e65d64faf472cf2ebc94f0f5ee0?d=identicon&s=25 Ara Howard (ahoward)
on 2009-02-06 19:27
(Received via mailing list)
NAME

   tagz.rb

SYNOPSIS

   require Tagz

   include Tagz.globally

   a_(:href => "/foo"){ "bar" }  #=>  <a href="/foo">bar</a>

DESCRIPTION

   tagz.rb is generates html, xml, or any sgml variant like a small
ninja
   running across the backs of a herd of giraffes swatting of heads
like a
   mark-up weedwacker.  weighing in at less than 200 lines of code
tagz.rb adds
   an html syntax to ruby that is both unobtrusive, safe, and available
   globally to objects without the need for any builder or superfluous
objects.
   tagz.rb is designed for applications that generate html to be able
to do so
   easily in any context without heavyweight syntax or scoping issues,
like a
   ninja sword through butter.

RAILS

   in config/environment.rb

     require 'tagz'

   in a helper

     def list_of_users
       ul_(:class => 'users'){
         @users.each{|user| li_{ user }}
       }
     end

   in a view

     <%=
       table_{
         rows.each do |row|
           tr_{
             row.each do |cell|
               td_{ cell }
             end
           }
         end
       }
     %>

   in a controller

     def ajax_responder
       text =
         tagz{
           table_{
             rows.each do |row|
               tr_{
                 row.each do |cell|
                   td_{ cell }
                 end
               }
             end
           }
         }

       render :text => text
     end

INSTALL

   gem install tagz

HISTORY
   4.6.0
     - fix a bug with self closing tagz that had crept in 1.0.0 ->
4.2.0.  thx
       jeremy hinegardner

     - added tests from 1.0.0 back into svn

   4.4.0
     - remove dependancy on cgi lib, tagz is now completely standalone

   4.3.0
     - detect rails and auto-include into ActionController::Base and
include
       globally into ActionView::Base

   4.2.0
     - general lib cleanup
     - introduction of dual-mixin technique (Tagz.globally)
     - few small bug fixes
     - ninja tales

SAMPLES

   <========< samples/a.rb >========>

   ~ > cat samples/a.rb

     #
     # in the simplest case tagz generates html using a syntax which
safely mixes
     # in to any object
     #

     require 'tagz'
     include Tagz.globally

     class GiraffeModel
       def link
         a_(:href => "/giraffe/neck/42"){ "whack!" }
       end
     end

     puts GiraffeModel.new.link

   ~ > ruby samples/a.rb

     <a href="/giraffe/neck/42">whack!</a>


   <========< samples/b.rb >========>

   ~ > cat samples/b.rb

     #
     # tagz.rb mixes quite easily with your favourite templating
engine, avoiding
     # the need for '<% rows.each do |row| %> ... <% row.each do |
cell| %> '
     # madness and other types of logic to be coded in the templating
language,
     # leaving templating to template engines and logic and looping to
ruby -
     # unencumbered by extra funky syntax
     #

     require 'tagz'
     include Tagz.globally

     require 'erb'

     rows = %w( a b c ), %w( 1 2 3 )

     template = ERB.new <<-ERB
       <html>
         <body>
           <%=

             if rows

               table_{
                 rows.each do |row|
                   tr_{
                     row.each do |cell|
                       td_{ cell }
                     end
                   }
                 end
               }

             end

           %>
         </body>
       </html>
     ERB

     puts template.result(binding)


   ~ > ruby samples/b.rb

       <html>
         <body>
           <table><tr><td>a</td><td>b</td><td>c</td></tr><tr><td>1</
td><td>2</td><td>3</td></tr></table>
         </body>
       </html>


   <========< samples/c.rb >========>

   ~ > cat samples/c.rb

     #
     # once you've learned to generate html using tagz you're primed
to generate
     # xml too
     #

     require 'tagz'
     include Tagz.globally

     doc =
       xml_{
         giraffe_{ 'large' }
         ninja_{ 'small' }
       }

     puts doc

   ~ > ruby samples/c.rb

     <xml><giraffe>large</giraffe><ninja>small</ninja></xml>


   <========< samples/d.rb >========>

   ~ > cat samples/d.rb

     #
     # tagz.rb doesn't cramp your style, allowing even invalid html to
be
     # generated.  note the use of the 'tagz' method, which can be
used both to
     # capture output and to append content to the top of the stack.
     #

     require 'tagz'
     include Tagz.globally

     def header
       tagz{
         html_
           body_(:class => 'ninja-like', :id => 'giraffe-slayer')

           tagz << "\n<!-- this is the header -->\n"
       }
     end

     def footer
       tagz{
         tagz << "\n<!-- this is the footer -->\n"

         body_
           html_
       }
     end

     puts header, footer

   ~ > ruby samples/d.rb

     <html><body class="ninja-like" id="giraffe-slayer">
     <!-- this is the header -->

     <!-- this is the footer -->
     <body><html>


   <========< samples/e.rb >========>

   ~ > cat samples/e.rb

     #
     # tagz.rb allows a safer method of mixin which requires any tagz
methods to be
     # insider a tagz block - tagz generating methods outside a tagz
block with
     # raise an error if tagz is included this way.  also notice that
the error is
     # reported from where it was raised - not from the bowels of the
the tagz.rb
     # lib.
     #

     require 'tagz'
     include Tagz

     puts tagz{
      html_{ 'works only in here' }
     }

     begin
       html_{ 'not out here' }
     rescue Object => e
       p :backtrace => e.backtrace
     end


   ~ > ruby samples/e.rb

     <html>works only in here</html>
     {:backtrace=>["samples/e.rb:17"]}


   <========< samples/f.rb >========>

   ~ > cat samples/f.rb

     #
     # tagz.rb can generate really compact html.  this is great to
save bandwidth
     # but can sometimes make reading the generated html a bit rough.
of course
     # using tidy or the dom inspector in firebug obviates the issue;
nevertheless
     # it's sometime nice to break things up a little.  you can use
'tagz << "\n"'
     # or the special shorthand '__' to accomplish this
     #

     require 'tagz'
     include Tagz.globally

     p div_{
       span_{ true }
       __
       span_{ false }  # hey ryan, i fixed this ;-)
       __
     }

   ~ > ruby samples/f.rb

     "<div><span>true</span>\n<span>false</span>\n</div>"






a @ http://codeforpeople.com/
Ef0db53920b243d6758c2f6b1306df0d?d=identicon&s=25 Steve Ross (cwd)
on 2009-02-08 04:18
(Received via mailing list)
On Feb 6, 2009, at 10:25 AM, ara.t.howard wrote:

>
>  a_(:href => "/foo"){ "bar" }  #=>  <a href="/foo">bar</a>
>

p_{
   em_{"this rocks"}
}
p_{"thank you very much for tagz!"}
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