On Tuesday 11 January 2005 08:15 pm, Christopher H. Laco wrote:
Without delving into the docs to get specific I'm pretty sure you can manage
all this in SimpleTagLib since it allows you to define the code which your
tags actually emit. TagLibHelper based taglibs would probably not really be
able to do it efficiently, though its certainly possible to concoct something
that would work.
> I'm looking for more info what exactly what $e is and what it contains
> in the context of writing a taglib:
>
> sub parse_start {
> my ($e, $tag, %attr) = @_;
>
> };
>
> I know AxKit is based on SAX which is basically start/end tag events. Is
> there any look-ahead in SAX?
>
> Basically, I'm trying to find out in one start tag, what the next tag
> is. Let's say I have an optional tag that will be used to filter the
> results normally loadedin the base tag:
>
> <mytag>
> <myfiltertag>
> </mytag>
>
> vs.
>
> <mytag>
>
> </mytag>
>
> When spitting out the underlying code, when <myfiltertag> is supplied, I
> would postpone any setup work in <mytag> until </myfiltertag> end event.
> When <myfiltertag> is left out, I need to do the setup work right awayin
> <mytag>.
>
> As <mytag> may contan many other tags, I can't just wait until the
> </mytag> event.
>
> This problem is even more complicated if <mytag> is a looper since
> typically <mytag> would do the first hald of the 'for $x (@y) {' code
> and the </mytag> code would finish it with '};'.
>
> <myfiltertag> could alter @y on the fly, but that really means I've
> still have to load @y twice. If would be more efficient if <mytag> knew
> it have a <myfiltertag> child and let </myfiltertag> take car of loading
> @y and starting the 'for $x (@y) {' code block.
>
> Thanks,
> -=Chris
>
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