Re: Variable-width font indentation

[Paul Eggert]

On 03/05/2018 05:40 PM, Clément Pit-Claudel wrote:
> I've tested it on two files: src/termcap.c and lisp/dabbrev.el.  To try it out, 
> open one of these files in emacs -Q, then run M-x ~/variable-pitch-indent, and 
> then M-x variable-pitch-mode.
>
> I do agree that it doesn't look too bad, and presumably a C implementation of the 
> algorithm above would be very fast, since it could build the "spine" above 
> during redisplay.

Thanks, that was fast! Yes, it should work fast.

I saw one easily-fixable minor glitch (on my screen lisp/dabbr.el line 
533 had the wrong indent, presumably since the "user-error" on the 
previous line was in a fatter-than usual font). The biggest trickier 
minor glitch was that indenting of #if and #else subparts were 
annoyingly different because the "#" violates the usual indentation 
rule. Personally I've always thought that we should indent "#" like 
anything else -- the only reason we don't is that it didn't work with 
K&R C and so we got used to bad style -- but even if we stick with the 
bad "#if" indenting it still looks pretty reasonable.