Fwd: libhubbub: branch rupindersingh/libhubbub updated. release/0.3.0-30-g1b8977f

John-Mark Bell jmb at netsurf-browser.org
Mon Jul 14 17:31:30 BST 2014


On Mon, Jul 14, 2014 at 09:11:05PM +0530, Rupinder Singh wrote:
> On Sat, Jul 12, 2014 at 10:47:48PM +0100, NetSurf Browser Project wrote:
> 
> > I don't understand this changeset. Why have you exposed the tokeniser's
> > internal state to the outside world? It is extremely dangerous to do
> > this, as it makes it utterly unclear what triggers a state transition.
> > Additionally, only the tokeniser needs to know what state it is in; the
> > client of the tokeniser must treat it as a black box.
> >
> 
> > I had the same concerns. Wanted to, but couldn't discuss it earlier. I
> did it as the specs say that the treebuilder must change tokeniser's state
> here, under "script" start tag, step 7.
> http://www.whatwg.org/specs/web-apps/current-work/multipage/tree-construction.html#parsing-main-inhead
> .. There can be workarounds to avoid this. Please suggest some, or I'll try
> to work out some.

Well, the existing precedent for this kind of thing is the tokeniser's
content model, or the pause flag. Essentially, hubbub_tokeniser_setopt
is used to inject configuration into the tokeniser, which it is
perfectly at liberty to ignore, if it wants. The point here is that the
injection of configuration is a *request* to do something, which allows
the internals of the tokeniser to be kept private from its client.


J.



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