40945 - Implement validating HTML parser using SP

Status: RESOLVED WONTFIX

Description

[Heikki Toivonen (remove -bugzilla when emailing directly)]

Because it has been possible to integrate Expat into Mozilla, it shouldn't be 
impossible to integrate SP, the validating SGML parser from James Clark, either. 
SP is used in many HTML validators available on the web already.

I do not know who would have the drive to implement this. Perhaps some HTML 
editor folks? Or it might interest the academic... A test project for advanced 
students learning programming with help of Mozilla, for example.

I see this as no big requirement. It would just be nice to have an HTML 
validator right in your browser, occasionally.

This could also be expanded to include support for any SGML documents (like what 
DocZilla does, although DocZilla has a closed-source parser). That would require 
quite a bit more work, however.

Comment 1

[rickg]

Nice to have, but absolutely non-essential for 6.0.

Comment 2

[Blake Ross]

reopening and marking Future...

Comment 3

[bsharma]

updated qa contact.

Comment 4

[Greg K.]

Possible applications for this include an iCab-style validness indicator, or
outright error indications for invalid content, perhaps as a user-selectable
preference.

Comment 5

[David Baron :dbaron: 🏴󠁵󠁳󠁣󠁡󠁿 ⌚UTC-8 (if account gets disabled due to email bounces, ask a bugzilla admin to reenable it)]

For reference:  http://www.jclark.com/sp/index.htm

Comment 6

[Christopher Hoess (gone)]

Reassigning to nobody.

Comment 7

[Scott A. Colcord]

Should this bug be a dependency for some of the bugs relating to user feedback
on invalid pages (bug 6211, for example)?

Comment 8

[Adam Tomlinson]

how difficult would this be to do? i can't program myself, but if it wouldn't 
be that hard i'm sure someone would be able to. this is blocking some pretty 
IMO important bugs.

Comment 9

[Brant Gurganus]

We might be able to use some of the basic code of the W3C's validator and port
it to C.  It uses the SP parser.

Comment 10

[Hixie (not reading bugmail)]

WONTFIX. This would be nice to have in an extension, but realistically, Mozilla
builds will probably never ship with this feature, even if someone provided a
patch to do it.

Comment 11

[Gérard Talbot]

I've been using HTML validator extension from M. Gueury at
http://users.skynet.be/mgueury/mozilla/
The Windows users can download and install version 0.8.3 
http://users.skynet.be/mgueury/mozilla/preview_080.html
which is a true validator, a SGML validator (based on OpenSP). 

I've been using it for the last 3 days with Firefox 1.5.0.3 and it works
basically - almost exactly - the same as the W3C validator but without having
to submit the page to the W3C HTML valdiator. It's great and I've had no problem whatsoever with it and while using it. I did not notice any significant
slowing down in the rendering of page and I'm using a Pentium 3, 667Mhz cpu,
384MB of RAM. The extension is 1,849 KB in size. M. Gueury's extension is more
powerful, more reliable, more useful and more versatile than anything I've seen
so far: it works off-line (and that is a big advantage), it can alternatively
use HTML Tidy (same code as Tidy from W3C), it can report accessibility errors,
warnings, accessibility issues to check manually.