Re: file modified on opening

[Kevin Rodgers]

François Gannaz wrote:
> Le mer 28 jun 09:43, Mickey Ferguson a écrit :
> > > I'm using a mmm-mode for HTML and PHP files (mixing html-helper-mode,
> > > php-mode, css-mode, etc.). When I open some files, they are marked as
> > > modifed ("**" in status bar), even if I just view them from Dired. Of
> > > course, the content isn't really modified.
> > Is there any chance that something that your .emacs is doing is causing
> > the butter to be modified?  One example I can think of is if you
> > automatically enter and exit picture-mode.  A buffer that has any
> > trailing spaces at the end of a line will then be modified by trimming
> > the trailing spaces.  Now this is only one possible example, but I would
> > comment out everything in your .emacs, and then add back in, piece by
> > piece, until you might find a cause that way.

I would suspect that text properties are being added.  Mickey could
find out with `M-: (goto-char (next-property-change (point-min)))'
followed by `C-u C-x ='.

> At first, I thought it was this, but I've already narrowed my .emacs to
>
> (require 'mmm-mode)
> (setq mmm-global-mode 'maybe)
> (mmm-add-group
>  'fancy-html
>   '(
>    (html-php-embedded
>     :submode php-mode
>     :face mmm-code-submode-face
>     :front "<\\?\\(php\\)?"
>     :back "\\?>")
>    ))
> (add-to-list 'mmm-mode-ext-classes-alist '(html-helper-mode nil fancy-html))
>
> And with such a tiny config, my file is still tagged as modified (at
> least with Emacs22, it's OK with Emacs 21). Maybe it's because of
> Debian's initialization, but I doubt it.

It's easy enough to check: Start Emacs 22 with the -Q option, then paste
that code into *scratch* and `M-x eval-buffer'.

> I tried debugging the wole process, I even learned to use edebug as the plain
> backtracing wasn't enough, but I can't find anything for now. I'll try
> debugging once again as I can't think of anything better.

--
Kevin