Re: file modified on opening

[Kevin Rodgers <ihs_4664@yahoo.com>]

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