Re: Fontless Info

[Alan Mackenzie]

Hi, Eli.

On Tue, Feb 19, 2013 at 06:20:41PM +0200, Eli Zaretskii wrote:
> > From: Tassilo Horn <address@hidden>
> > Date: Tue, 19 Feb 2013 11:16:25 +0100
> > Cc: address@hidden

> > Aidan Gauland <address@hidden> writes:

> > > Emacs was run with -Q, and I ran `make distclean' before rebuilding
> > > again to make sure it wasn't a problem with my local build.  This
> > > appears to be a bug, but if no one else can reproduce it...

> > You are not alone.  I've just updated my emacs copy, and I can reproduce
> > the issue.  So it's clearly a bug.

> This happens because font-lock-mode gets turned off in Info buffers.
> Type "M-x font-lock-mode RET", and all the niceties are back.  (You
> could guess that this is the problem if you'd go to the un-decorated
> text and type "M-x describe-text-properties RET" there.)

> The reason seems to be the changes in revision 111794: their result is
> that, after Info mode is turned on and turns on font-lock, font-lock
> is turned off again by something called
> global-font-lock-mode-check-buffers.  And to make things _really_
> interesting, if you run this under Edebug, the problem disappears...

Thanks for the prod!

> Since the voodoo of easy-mmode is beyond me, I'll let others fix this.

This might well do the trick:



=== modified file 'lisp/emacs-lisp/easy-mmode.el'
*** lisp/emacs-lisp/easy-mmode.el       2013-02-15 20:01:51 +0000
--- lisp/emacs-lisp/easy-mmode.el       2013-02-19 23:03:30 +0000
***************
*** 417,423 ****
         ;; Go through existing buffers.
         (dolist (buf (buffer-list))
           (with-current-buffer buf
!            (if ,global-mode (,turn-on) (when ,mode (,mode -1))))))
  
         ;; Autoloading define-globalized-minor-mode autoloads everything
         ;; up-to-here.
--- 417,425 ----
         ;; Go through existing buffers.
         (dolist (buf (buffer-list))
           (with-current-buffer buf
!            (if ,global-mode
!                (,turn-on)
!              (when ,mode (let (,disable-MODE) (,mode -1)))))))
  
         ;; Autoloading define-globalized-minor-mode autoloads everything
         ;; up-to-here.
***************
*** 439,445 ****
                   (if ,mode (,mode -1))
                 (unless (eq ,MODE-major-mode major-mode)
                   (if ,mode
!                      (progn
                         (,mode -1)
                         (,turn-on))
                     (,turn-on))))
--- 441,447 ----
                   (if ,mode (,mode -1))
                 (unless (eq ,MODE-major-mode major-mode)
                   (if ,mode
!                      (let (,disable-MODE)
                         (,mode -1)
                         (,turn-on))
                     (,turn-on))))


-- 
Alan Mackenzie (Nuremberg, Germany).