Re: [PATCH] Unconditional quit on SIGUSR2

[Daniel Colascione]

On 3/28/2011 1:06 PM, Lennart Borgman wrote:
> On Mon, Mar 28, 2011 at 9:56 PM, Daniel Colascione
> <address@hidden>  wrote:
> > On 3/28/2011 12:52 PM, Lennart Borgman wrote:
> > > But can't that be taken care of by letting font lock run again?
> >
> > It depends on how fontification is being run.  If we're using jit-lock, then
> > I believe we'll try again automatically.  If we're using some other
> > approach, then fontification will likely just be canceled until the next
> > time that portion of the buffer is modified.  There's also the issue of
> > runaway process filters which I believe also run with quit disabled.
>
> Should not all new code use jit-lock for fontification (or the a bit
> misname fontification-functions)? Is there a lot of old code in Emacs
> not using jit-lock?

Until we remove everything besides jit-lock, we have to account for its 
absence.  And it still doesn't address the issue of other background 
work that runs with quit inhibited.

Also, I strongly discourage anyone using fontification-functions 
directly.  Using this function bypass font-lock entirely, breaking 
font-lock-mode, add-font-lock-keywords, highlight-phrase, and other 
Emacs features.  It also adds no expressive power over 
font-lock-keywords, and IMHO, fontification-functions should be 
documented as being for internal use only.