From: michael libby <x@...>
Date: 2002-08-11T09:06:48+09:00
Subject: Re: extend Html4?

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On Saturday 10 August 2002 18:44, Philip Mak wrote:

> How can I become able to write it like this?
>
> > puts p{"Hello, "+b{"world"}+"!"}
>
> I want the "p", "b" etc. methods to be exported to my namespace. They
> are defined inside Html4:

Here's what I did, although it may not suit your tastes:

class MyCGI  < CGI
  def hello_world
	return p{"Hello, " + b{"world"} + "!"}
  end
end

c = MyCGI.new("html4")
puts c.hello_world

This way I can keep all the messages in my subclass, where they are fairly 
self-contained. This way, if I ever need to switch from CGI to XML or 
plain output for the screen, instead of rewriting my main module, I just 
have to make a MyXML or MyMessages class and use it in my main script 
instead.

I also build methods to translate CGI stuff like parameters into what my 
main script needs to know. Prevents my main script from having to know 
that the request started life as CGI.

Not that I ever expect to do need to switch from CGI to something else, but 
the main benefit is that it keeps program logic separate from message 
output logic, so both the program and output code is easier to follow... 
and it makes writing the HTML methods a lot easier.

 -michael

++++++++++++++++++++++++++++++++++++++++++
Michael C. Libby <x@ichimunki.com>
public key: http://www.ichimunki.com/public_key.txt
web site: http://www.ichimunki.com
++++++++++++++++++++++++++++++++++++++++++
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