HTML::Element->right/->look_down lose, I need to walk the tree
am 20.06.2005 14:56:54 von Roderick Schertler
Consider this HTML::Element dump of a simple HTML page:
@0
@0.0
@0.0.0<br />
"HTML::Element test"<br />
<body> @0.1<br />
<div> @0.1.0<br />
<h1> @0.1.0.0<br />
"heading"<br />
<p> @0.1.1<br />
"paragraph"<br />
<br />
I've got to find the <p> after first searching for the <h1>. Because of<br />
the <div> I can't use $h1->right. My first thought was to start from<br />
$h1->pindex in $h1->parent->content_list, but this would fail if there<br />
were even more levels between the two.<br />
<br />
I really need to continue a walk of the tree, starting at h1. I can't<br />
find an HTML::Element method which does that. It is an easy enough<br />
iterator to write, but it seems so basic a need that I figure it's there and<br />
I'm missing it. Is it?<br />
<br />
It also seems to me that there should be something like ->look_down<br />
(->look_next?) which does a search like this, for the same reason.<br />
<br />
-- <br />
Roderick Schertler<br />
roderick@argon.org</p>
</article>
<article>
<h2>Re: HTML::Element->right/->look_down lose, I need to walk the tree</h2><span>am 05.09.2005 06:28:53 von Terrence Brannon</span>
<p>Roderick Schertler <roderick@argon.org> writes:<br />
<br />
> Consider this HTML::Element dump of a simple HTML page:<br />
><br />
> <html> @0<br />
> <head> @0.0<br />
> <title> @0.0.0<br />
> "HTML::Element test"<br />
> <body> @0.1<br />
> <div> @0.1.0<br />
> <h1> @0.1.0.0<br />
> "heading"<br />
> <p> @0.1.1<br />
> "paragraph"<br />
><br />
> I've got to find the <p> after first searching for the <h1>.<br />
<br />
you want a sibling of $tree->look_down('_tag' => 'h1') ;<br />
<br />
if you use HTML::Element::Library on CPAN you can do this with easeeeee<br />
<br />
> Because of the <div> I can't use $h1->right. My first thought was<br />
> to start from<br />
> $h1->pindex in $h1->parent->content_list, but this would fail if there<br />
> were even more levels between the two.<br />
<br />
you can always use look_up after looking down :)<br />
<br />
> I really need to continue a walk of the tree, starting at h1. I can't<br />
> find an HTML::Element method which does that. It is an easy enough<br />
> iterator to write, but it seems so basic a need that I figure it's there and<br />
> I'm missing it. Is it?<br />
><br />
> It also seems to me that there should be something like ->look_down<br />
> (->look_next?) which does a search like this, for the same reason.<br />
<br />
again HTML::Element::Library contains all of my tree-grokking routines<br />
+ the ones from Matthew Sisk's code for this HTML::Element hax<br />
<br />
> ><br />
> -- <br />
> Roderick Schertler<br />
> roderick@argon.org<br />
<br />
-- <br />
Carter's Compass: I know I'm on the right track when,<br />
by deleting something, I'm adding functionality.</p>
</article>
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