Re: Font-lock repeats itself

[Daniel Pfeiffer]

Saluton,

Stefan Monnier <address@hidden> skribis:

> > Note: I don't think a font-lock support mode is compatible with compile,
> 
> I'd take it to mean that your `compile' should not use font-lock or should
> use it differently.  Especially since `jit-lock' is the default in Emacs-21.

I know.  In my compilation-mode font-lock support-modes are currently turned 
off.

Rather than patch two different parsers which both have deficiencies 
(compilation's are far bigger than font-lock's), emacs should have just one 
parser and make that really good.  On that hope I am rebasing shaky compile on 
font-lock.

> > because I am dependent on everything before the current line having been
> > parsed.  (At least the directory lines, but in practise that means
> > everything.)
> 
> Font-lock does not give you this guarantee.

As far as I have seen, non-support-mode font-locking doesn't leave any 
unfontified gaps, so at least the result is correct.  Should even this not be 
generally true, I'd have to learn support modes in depth.  I'll explore later 
what can maybe be done with JIT.  The other support-modes don't make sence here.

> PS: I haven't looked at your recipe yet, so I'm not saying there's no
>     bug, just that even if there's a bug, the fix will not ensure that
>     "everything before point has been parsed".

More an inefficiency than a bug.  My worry is just that font-lock wastes 
ressources by doing the same text repeatedly even though that text hasn't been 
touched in between.  Since I get this behaviour in JIT and no support-mode, I 
guess it must be font-lock itself that's at fault.

JIT is a good workaround (besides preventing emacs from locking up for seconds 
while loading a huge buffer).  But JIT can also lock up almost endlessly when 
you hit the page-down key repeatedly since it won't scroll before it's 
fontified and it won't fontify because there's a pending command...  This only 
happens with my setup, not emacs -q, but I don't understand why -- have to 
explore that too.

coralament / best Grötens / liebe Grüße / best regards / elkorajn salutojn
Daniel Pfeiffer

-- 
lerne / learn / apprends / läramå    Esperanto:
                              http://lernu.net/