Re: [Bug-AUCTeX] TeX fill instead of LaTeX fill for \subsection at top of file

[Chris Pickett]

Ralf Angeli wrote:

> Wow, you make me jump through hoops.  I had to switch to a Linux console
> to see what you mean because the GTK port behaves differently.  So I
> guess I can confirm it.  But couldn't you just have said "Yes, there is
> a menu called 'Command'"?

I'm sorry, I thought you meant there should be a Command sub-menu or 
menu item specific for AUCTeX.  I didn't realize everything in Command 
was AUCTeX specific, or I thought a Command menu existed normally, or I 
don't even know what I thought.  Something illogical, but I guess I 
rarely use menus.  Mea culpa for not reading closely.

> This was just an example demonstrating that forcing LaTeX mode under
> every circumstance is not a good idea.

Looking at the manual and seeing it applies to TeXinfo too which I do 
edit occasionally, this makes sense for me personally also.

> Okay, I now actually checked with a file as you provided it (shame on me
> for not doing so before) and yes, it falls back to Plain TeX mode
> because there is no string which is recognized by AUCTeX identifying the
> file as being a LaTeX file.

Perhaps, getting down to the supposed "bug" here, it would be possible 
to make \subsection be such a string.  After all, if \section is such a 
string, presumably there's an argument for \subsection being derived 
from it and inheriting many of its properties/connotations/whatever. 
(Of course the same would apply to other section headers too.)

> You have two options dealing with the problem:
>
> 1) Set `TeX-force-default-mode' to t.
>
>    This will disable the automatic file type recognition and always use
>    the mode specified in `TeX-default-mode'.  However, I don't recommend
>    this because it will disable a useful feature and is usually not
>    necessary because there is option 2.
>
> 2) Set the variables `TeX-auto-save', `TeX-parse-self' and `TeX-master'
>    as described on the first page of the AUCTeX manual.
>
>    Especially the `TeX-master' setting will lead to AUCTeX prompting you
>    for a master file each time you start a new file and then insert a
>    "Local variables" stanza into the file like this:
>
>    %%% Local Variables: 
>    %%% mode: latex
>    %%% TeX-master: t
>    %%% End: 

Ah, I remember these guys from some past life.  Now I know what they do!

>    You can see that in the stanza the mode is specified and this is
>    usually the default mode, namely LaTeX mode.  Each time you open the
>    file this mode will be activated regardless of what the automatic
>    detection would propose.
>
>    For your existing files you can force the insertion of the stanza by
>    typing `C-c _'.  You will have to replace `plain-tex' with `latex'
>    and then type `C-c C-n' to reinitialize the mode.
>
>    Note that this feature is mainly about the master file.  (The mode
>    setting is secondary.)  The master file is the LaTeX should be run on
>    in order to typeset the document if it is spread across different
>    files.  Since you mentioned you actually _are_ dealing with documents
>    spread across several files this is likely useful for you.

Thanks for your help,
Chris