From: jakemiles <jacob.miles@...>
Date: 2009-12-05T01:10:24+09:00
Subject: Re: using heredoc string in erb

Thanks!  The .chomp fixed it.

No, the intention isn't to create helper functions in Java.  The web
page happens to be a tutorial on Java.  The helper function is a ruby
helper that appliers google's syntaxhighlighting javascript thing to
the provided block of text.

The resulting code in the view, for posterity, is:

  <%= code "java", <<-"CODE".chomp

	// create a panel using a GridBagLayout
	JPanel panel = new JPanel (new GridBagLayout());

	// three labels on the first row
	panel.add (new JLabel ("One"));
	panel.add (new JLabel ("Two"));
	panel.add (new JLabel ("Threeeee"));

CODE
%>

And the helper function it calls is this:

  def code(lang, block)
    "<script type=\"syntaxhighlighter\" class=\"brush: #{lang}\"><!
[CDATA[#{block}]]></script>"
  end

This turns the provided block of code into this HTML:

  <script type="syntaxhighlighter" class="brush: java"><![CDATA[
	// create a panel using a GridBagLayout
	JPanel panel = new JPanel (new GridBagLayout());

	// three labels on the first row
	panel.add (new JLabel ("One"));
	panel.add (new JLabel ("Two"));
	panel.add (new JLabel ("Threeeee"));
]]></script>

Which is the syntax for the syntaxhighlighter package that syntax-
highlights the code in the page andmakes it look quite sharp.  The
helper will also automagically include the right javascript file for
the language of the formatted code block.



On Dec 4, 9:51 am, Robert Klemme <shortcut...@googlemail.com> wrote:
> 2009/12/4 jakemiles <jacob.mi...@gmail.com>:
>
>
>
> > Hi.  I'd like to use heredoc notation in an erb view (I'm using Merb,
> > but I believe this is an erb issue, not specific to merb).  For
> > example, I wrote a helper function that lets me use syntax like that
> > below.  However, this example produces a parser error:
>
> > can't find string "CODE" anywhere before EOF
>
> > Any ideas how I can get this to work?  I posted this on the merb group
> > as well, but I suspect it's really an erb issue:
>
> >  <%= code "java", <<-CODE
>
> >        // create a panel using a GridBagLayout
> >        JPanel panel = new JPanel (new GridBagLayout());
>
> >        // three labels on the first row
> >        panel.add (new JLabel ("One"));
> >        panel.add (new JLabel ("Two"));
> >        panel.add (new JLabel ("Threeeee"));
>
> >  CODE %>
>
> Make that
> CODE
> %>

>

> IOW, place the %> on the next line.
>
> > If I can get this to work it would be a really cool technique for
> > writing HTML helper functions.
>
> HTML helper functions in Java in an ERB template?  How does this work?
>
> Cheers
>
> robert
>
> --
> remember.guy do |as, often| as.you_can - without endhttp://blog.rubybestpractices.com/