Re: [orca-list] Still issues with the navigation extension in FF

["Rich Caloggero" <rjc MIT EDU>]

Hi Jason.

My understanding is that xPath only works on XML documents. What happens if 
we load an HTML4 document? Will xPath still be usable?

Thanx.
-- Rich


----- Original Message ----- 
From: "Jason White" <jason jasonjgw net>
To: <orca-list gnome org>
Sent: Wednesday, July 09, 2008 12:51 AM
Subject: Re: [orca-list] Still issues with the navigation extension in FF


On Tue, Jul 08, 2008 at 02:22:48PM -0400, Rich Caloggero wrote:

> This is due to the way I'm processing the document. Because I wanted a 
> quick
> and durty first pass, I process the entire document and extract all links
> (or headings depending on which extension we're talking about) into an 
> array
> each time I open the extension's main dialog. This gives a large 
> performance
> hit for large pages. I'll fix this soon.

As others have suggested, XPath might give you more efficient results. While
it would be possible to maintain a cache of the links (or headings), the
problem is that a client-side script can modify the DOM at any moment,
potentially modifying/inserting/deleting links or headings. The added
complexity of obtaining and handling mutation events to detect such changes,
and keeping the cache accurate, may not be worth the efficiency gain.

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