Re: [docbook] <informalexample> to contain one or multiple <programlisting>element(s) for a multi-line source code block?

[Patrick Eisenacher <eisenacher@fillmore-labs.com>]

Hi Taro,

the docbook programlisting tag preserves whitespaces. From TDG 
(http://www.docbook.org/tdg/en/html/programlisting.html):

> Processing Expectations
> 
> Formatted as a displayed block. This element is displayed “verbatim”; whitespace and linebreaks within this element are significant. ProgramListings are usually displayed in a fixed width font.

Patrick

Taro Ikai schrieb:
> 
> http://www.docbook.org/tdg/en/html/informalexample.html
> 
> cites an example of <informalexample><programlisting> block that contains
> several lines of source code block in a single <programlisting> element:
> 
> <informalexample>
> <programlisting>
> sub print_content_model {
>    my($self) = shift;
>    local($_) = shift;
>    local(*FILE) = shift;
> 
>    my(@cm) = $self->format_content_model2($_);
>    foreach $_ (@cm) {
>        print FILE $self->make_links($_, 1, 1), "\n";
>    }
> }
> </programlisting>
> </informalexample>
> 
> My limited understanding of XML is that it does not pay attention to
> the white spaces or new lines within CDATA sections. The CYGWIN
> distribution of Tidy, for example, does not not preserve
> the new lines within CDATA.
> 
> Am I better off to use something like the following?
> 
> <informalexample>
>   <programlisting>sub print_content_model {</programlisting>
>   <programlisting>&nbsp;&nbsp;my($self) = shift;</programlisting>
>   <programlisting>&nbsp;&nbsp;local($_) = shift;</programlisting>
>   <programlisting>&nbsp;&nbsp;local(*FILE) = shift;</programlisting>
>   <programlisting>&nbsp;&nbsp; my(@cm) = 
> $self->format_content_model2($_);</programlisting>
>   <programlisting/>
>   <programlisting>&nbsp;&nbsp;foreach $_ (@cm) {</programlisting>
>   <programlisting>&nbsp;&nbsp;    print FILE $self->make_links($_, 1, 
> 1), "\n";</programlisting>
>   <programlisting>&nbsp;&nbsp;}</programlisting>
>   <programlisting>}</programlisting>
> </informalexample>
> 
> Taro Ikai