tex mode sub- and super-scripts

tex mode sub- and super-scripts

[Mark Alford]

I just upgraded to Fedora 7, which means I got upgraded from
emacs-21 to emacs-22. Now I find that when I edit a TeX file,
all subscripts (TeX _{xxx}) and superscripts (TeX ^{xxx})
are rendered in small type, lowered or raised on the line.

Since TeX is a markup language not a WYSIWYG application
this is not helpful to the readability of the TeX source.

How do I switch off this new behavior, while keeping the syntactic
color highlighting (font lock) that is helpful when composing TeX?

Re: tex mode sub- and super-scripts

[Peter Dyballa]

Am 30.06.2007 um 04:30 schrieb Mark Alford:

> I just upgraded to Fedora 7, which means I got upgraded from
> emacs-21 to emacs-22. Now I find that when I edit a TeX file,
> all subscripts (TeX _{xxx}) and superscripts (TeX ^{xxx})
> are rendered in small type, lowered or raised on the line.

Are you using AUCTeX? You can see this in mode-line, menus, and  
*Messages* buffer. Then switch its use off! For example by finding  
the Elisp file that loads or requires tex-site ...

--
Greetings

   Pete

"engineer: a mechanism for converting caffeine into designs"

Re: tex mode sub- and super-scripts

[Sebastian Meisel]

Dear Peter,
>
> Am 30.06.2007 um 04:30 schrieb Mark Alford:
>
> Are you using AUCTeX? You can see this in mode-line, menus, and 
> *Messages* buffer. Then switch its use off! For example by finding the 
> Elisp file that loads or requires tex-site ...
You are more likely wanting to use AUCTeX so you just have to customize:

Font LaTeX Script Display
Font LaTeX Superscript Face
and
Font LaTeX Subscript Face

Greetings
Sebastian Meisel

Re: tex mode sub- and super-scripts

[Reiner Steib]

On Sat, Jun 30 2007, Peter Dyballa wrote:

> Am 30.06.2007 um 04:30 schrieb Mark Alford:
>
>> I just upgraded to Fedora 7, which means I got upgraded from
>> emacs-21 to emacs-22. Now I find that when I edit a TeX file,
>> all subscripts (TeX _{xxx}) and superscripts (TeX ^{xxx})
>> are rendered in small type, lowered or raised on the line.
>
> Are you using AUCTeX? 

The Emacs-builtin TeX mode has this feature as well (it even had it
before AUCTeX, IIRC).

> You can see this in mode-line, menus, and *Messages* buffer. Then
> switch its use off!

Nonsense.  In AUCTeX, there's a variable to turn it off and customize
it.  There's no option to turn it off in the Emacs-builtin TeX mode,
CMIIW.

,----[ <f1> v font-latex-fontify-script RET ]
| font-latex-fontify-script is a variable defined in `font-latex'.
| Its value is t
| 
| This variable is safe as a file local variable if its value
| satisfies the predicate `TeX-booleanp'.
| 
| Documentation:
| If non-nil, fontify subscript and superscript strings.
| This feature does not work in XEmacs.
| 
| You can customize this variable.
`----

,----[ M-x customize-variable RET font-latex-script-display RET ]
| Font Latex Script Display: [Hide Value]
| Choice: [Value Menu] Subscript form: (raise -0.3)
| Choice: [Value Menu] Superscript form: (raise 0.3)
|    [State]: STANDARD.
| 
| Display specification for subscript and superscript content. [Hide Rest]
| The car is used for subscript, the cdr is used for superscripts.
| Parent groups: [Font Latex]
`----

Bye, Reiner.
-- 
       ,,,
      (o o)
---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/

Re: tex mode sub- and super-scripts

[Peter Dyballa]

Am 30.06.2007 um 11:29 schrieb Sebastian Meisel:

> You are more likely wanting to use AUCTeX so you just have to  
> customize:
>
> Font LaTeX Script Display
> Font LaTeX Superscript Face
> and
> Font LaTeX Subscript Face

*I* don't see how to make AUCTeX place them in line instead of above  
or below ...

--
Mit friedvollen Grüßen

   Pete

Patriotismus ist die Überzeugung, dass unser Vaterland allen anderen  
Ländern überlegen ist, weil wir darin geboren wurden.
                                         (George Bernard Shaw)

Re: tex mode sub- and super-scripts

[Eli Zaretskii]

> Date: Fri, 29 Jun 2007 21:30:18 -0500 (CDT)
> From: Mark Alford <alford@wuphys.wustl.edu>
> 
> I just upgraded to Fedora 7, which means I got upgraded from
> emacs-21 to emacs-22. Now I find that when I edit a TeX file,
> all subscripts (TeX _{xxx}) and superscripts (TeX ^{xxx})
> are rendered in small type, lowered or raised on the line.
> 
> Since TeX is a markup language not a WYSIWYG application
> this is not helpful to the readability of the TeX source.
> 
> How do I switch off this new behavior, while keeping the syntactic
> color highlighting (font lock) that is helpful when composing TeX?

You should be able to customize the two faces `subscript' and
`superscript' defined by tex-mode.

Did that do what you want?

Re: tex mode sub- and super-scripts

[Mark Alford]

Thank you all for your help.

Eli Zaretskii <eliz@gnu.org> wrote:
> You should be able to customize the two faces `subscript' and
> `superscript' defined by tex-mode.

Can you tell me how do I do that by putting commands in my .emacs file?
I would like a general solution that I can port to many computers, not
a point-and-click routine that I have to re-do on each machine.




Peter Dyballa <Peter_Dyballa@Web.DE> wrote:
> Are you using AUCTeX? You can see this in mode-line, menus, and
> *Messages* buffer. Then switch its use off!

No, I am just using the regular emacs that came packaged with Fedora 7.
I don't see the word "AUCTeX" anywhere. I don't think it is even 
installed on my computer.


Sebastian Meisel <sebastianmeisel@web.de> wrote:
> You are more likely wanting to use AUCTeX so you just have to customize:
> Font LaTeX Script Display
> Font LaTeX Superscript Face
> Font LaTeX Subscript Face

I don't want to use AUCTeX, I just want to revert the way emacs-22
tex-mode treats super/sub scripts back to how it was in emacs-21.




Mark

Re: tex mode sub- and super-scripts

[Reiner Steib]

On Sat, Jun 30 2007, Peter Dyballa wrote:

> Am 30.06.2007 um 11:29 schrieb Sebastian Meisel:
>
>> You are more likely wanting to use AUCTeX so you just have to customize:
>>
>> Font LaTeX Script Display
>> Font LaTeX Superscript Face
>> and
>> Font LaTeX Subscript Face
>
> *I* don't see how to make AUCTeX place them in line instead of above
> or below ...

How about reading the doc strings or play around with customize?

Set `font-latex-fontify-script' to nil.  That's all.  Or, if you only
want a smaller font, but no raise or lower, set
`font-latex-script-display' to nil:

,----[ M-x customize-variable RET font-latex-script-display RET ]
| font-latex-script-display: [Hide Value]
| Choice: [Value Menu] No lowering
| Choice: [Value Menu] No raising
|    [State]: SET for current session only.
`----

Bye, Reiner.
-- 
       ,,,
      (o o)
---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/

Re: tex mode sub- and super-scripts

[Peter Dyballa]

Am 30.06.2007 um 17:16 schrieb Mark Alford:

> No, I am just using the regular emacs that came packaged with  
> Fedora 7.
> I don't see the word "AUCTeX" anywhere.

Yes, I just could see that 'emacs -Q' shows this behaviour, too. I  
think you will need to edit tex-mode.el not to raise (positively or  
negatively) anything ...

--
Greetings

   Pete

Work is the curse of the drinking class.        — Oscar Wilde

Re: tex mode sub- and super-scripts

[Eli Zaretskii]

> Date: Sat, 30 Jun 2007 10:16:31 -0500 (CDT)
> From: Mark Alford <alford@wuphys.wustl.edu>
> 
> Eli Zaretskii <eliz@gnu.org> wrote:
> > You should be able to customize the two faces `subscript' and
> > `superscript' defined by tex-mode.
> 
> Can you tell me how do I do that by putting commands in my .emacs file?

I can, but I'd like to hear first that doing this interactively solves
your problem.

Re: tex mode sub- and super-scripts

[Mark Alford]

Eli Zaretskii <eliz@gnu.org> wrote:
> You should be able to customize the two faces `subscript' and
> `superscript' defined by tex-mode.

I can control their size but not their raising/lowering.

Edit -> Text Properties -> Display Faces
   click on "superscript", up comes window of properties
   uncheck "height"
   click on "save for future sessions"

This makes superscripts come out the right size, and adds
to my .emacs file the following:

(custom-set-faces
  '(superscript ((t nil))))

All I need now is a way to get rid of the raising of superscripts.
If that isn't a Face property, what is it?


Mark

Re: tex mode sub- and super-scripts

[Eli Zaretskii]

> Date: Sat, 30 Jun 2007 21:02:56 -0500 (CDT)
> From: Mark Alford <alford@wuphys.wustl.edu>
> 
> Eli Zaretskii <eliz@gnu.org> wrote:
> > You should be able to customize the two faces `subscript' and
> > `superscript' defined by tex-mode.
> 
> I can control their size but not their raising/lowering.

I was afraid of that.

> All I need now is a way to get rid of the raising of superscripts.
> If that isn't a Face property, what is it?

It seems to be explicit code, see tex-font-lock-suscript.  Perhaps you
will be able to fix that by tweaking tex-font-lock-keywords-3, but
that means editing tex-mode.el.

I suggest to submit a bug report asking for this feature to be
customizable.

Re: tex mode sub- and super-scripts

[David Kastrup]

Peter Dyballa <Peter_Dyballa@Web.DE> writes:

> Am 30.06.2007 um 04:30 schrieb Mark Alford:
>
>> I just upgraded to Fedora 7, which means I got upgraded from
>> emacs-21 to emacs-22. Now I find that when I edit a TeX file,
>> all subscripts (TeX _{xxx}) and superscripts (TeX ^{xxx})
>> are rendered in small type, lowered or raised on the line.
>
> Are you using AUCTeX? You can see this in mode-line, menus, and
> *Messages* buffer. Then switch its use off!

Since AUCTeX adopted this functionality from Emacs' default modes
rather than the other way round, I doubt that your advice is of any
use in his situation, even if we stipulated that this particular part
of highlighting was enough of a nuisance to make disabling AUCTeX a
no-brainer _if_ it helped.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

Re: tex mode sub- and super-scripts

[Reiner Steib]

[ I'd suggest to move this discussion to <emacs-devel@gnu.org>.

  Summary: In Emacs TeX-mode (textmodes/tex-mode.el), there's no
  option to suppress the raise/lowering of superscripts and
  subscripts.  In AUCTeX, we used tex-mode.el's code, but added
  options to turn off this feature.

  %%%%%%%%%%
  $a_0 = a_{f}^{2} + b_{\alpha}$
  \bye
  %%%%%%%%%%
]

On Sun, Jul 01 2007, Eli Zaretskii wrote:

>> Date: Sat, 30 Jun 2007 21:02:56 -0500 (CDT)
>> From: Mark Alford <alford@wuphys.wustl.edu>
>> 
>> Eli Zaretskii <eliz@gnu.org> wrote:
>> > You should be able to customize the two faces `subscript' and
>> > `superscript' defined by tex-mode.
>> 
>> I can control their size but not their raising/lowering.
[...]
> It seems to be explicit code, see tex-font-lock-suscript.  [...]
>
> I suggest to submit a bug report asking for this feature to be
> customizable.

I'd be willing to port AUCTeX's customization options ([1], code
written by me) to tex-mode.el.  Any objections?  Stefan?

(If it's okay to install this patch, should it go to the Emacs 22
branch?)

--8<---------------cut here---------------start------------->8---
--- tex-mode.el	20 May 2007 15:18:56 +0200	1.186
+++ tex-mode.el	01 Jul 2007 10:38:31 +0200	
@@ -243,6 +243,21 @@
   :options '("''" "\">" "\"'" ">>" "»")
   :group 'tex)
 
+(defcustom tex-fontify-script t
+  "If non-nil, fontify subscript and superscript strings."
+  :type 'boolean
+  :group 'tex)
+(put 'tex-fontify-script 'safe-local-variable 'booleanp)
+
+(defcustom tex-font-script-display '((raise -0.3) . (raise 0.3))
+  "Display specification for subscript and superscript content.
+The car is used for subscript, the cdr is used for superscripts."
+  :group 'tex
+  :type '(cons (choice (sexp :tag "Subscript form")
+		       (const :tag "No lowering" nil))
+	       (choice (sexp :tag "Superscript form")
+		       (const :tag "No raising" nil))))
+
 (defvar tex-last-temp-file nil
   "Latest temporary file generated by \\[tex-region] and \\[tex-buffer].
 Deleted when the \\[tex-region] or \\[tex-buffer] is next run, or when the
@@ -593,13 +608,14 @@
 		  (setq pos (1- pos) odd (not odd)))
 		odd))
     (if (eq (char-after pos) ?_)
-	'(face subscript display (raise -0.3))
-      '(face superscript display (raise +0.3)))))
+	'(face subscript display (car tex-font-script-display))
+      '(face superscript display (cdr tex-font-script-display)))))
 
 (defun tex-font-lock-match-suscript (limit)
   "Match subscript and superscript patterns up to LIMIT."
-  (when (re-search-forward "[_^] *\\([^\n\\{}]\\|\
-\\\\\\([a-zA-Z@]+\\|[^ \t\n]\\)\\|\\({\\)\\)" limit t)
+  (when (and tex-fontify-script
+	     (re-search-forward "[_^] *\\([^\n\\{}]\\|\
+\\\\\\([a-zA-Z@]+\\|[^ \t\n]\\)\\|\\({\\)\\)" limit t))
     (when (match-end 3)
       (let ((beg (match-beginning 3))
 	    (end (save-restriction
--8<---------------cut here---------------end--------------->8---

Bye, Reiner.

[1] Cf.
    http://mid.gmane.org/v93b09938i.fsf%40marauder.physik.uni-ulm.de
    http://mid.gmane.org/v9hcop79f3.fsf%40marauder.physik.uni-ulm.de

,----[ <f1> v font-latex-fontify-script RET ]
| font-latex-fontify-script is a variable defined in `font-latex'.
| Its value is t
| 
| This variable is safe as a file local variable if its value
| satisfies the predicate `TeX-booleanp'.
| 
| Documentation:
| If non-nil, fontify subscript and superscript strings.
| This feature does not work in XEmacs.
| 
| You can customize this variable.
`----

,----[ M-x customize-variable RET font-latex-script-display RET ]
| Font Latex Script Display: [Hide Value]
| Choice: [Value Menu] Subscript form: (raise -0.3)
| Choice: [Value Menu] Superscript form: (raise 0.3)
|    [State]: STANDARD.
| 
| Display specification for subscript and superscript content. [Hide Rest]
| The car is used for subscript, the cdr is used for superscripts.
| Parent groups: [Font Latex]
`----

,----[ M-x customize-variable RET font-latex-script-display RET ]
| font-latex-script-display: [Hide Value]
| Choice: [Value Menu] No lowering
| Choice: [Value Menu] No raising
|    [State]: SET for current session only.
`----
-- 
       ,,,
      (o o)
---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/

Re: tex mode sub- and super-scripts

[Stefan Monnier]

> I'd be willing to port AUCTeX's customization options ([1], code
> written by me) to tex-mode.el.  Any objections?  Stefan?

Fine by me.

> +(defcustom tex-font-script-display '((raise -0.3) . (raise 0.3))
> +  "Display specification for subscript and superscript content.
> +The car is used for subscript, the cdr is used for superscripts."
> +  :group 'tex
> +  :type '(cons (choice (sexp :tag "Subscript form")
> +		       (const :tag "No lowering" nil))
> +	       (choice (sexp :tag "Superscript form")
> +		       (const :tag "No raising" nil))))

I'm curious: for what has this been used?


        Stefan

Re: tex mode sub- and super-scripts

[Reiner Steib]

On Sun, Jul 01 2007, Stefan Monnier wrote:

>> +(defcustom tex-font-script-display '((raise -0.3) . (raise 0.3))
>> +  "Display specification for subscript and superscript content.
>> +The car is used for subscript, the cdr is used for superscripts."
>> +  :group 'tex
>> +  :type '(cons (choice (sexp :tag "Subscript form")
>> +		       (const :tag "No lowering" nil))
>> +	       (choice (sexp :tag "Superscript form")
>> +		       (const :tag "No raising" nil))))
>
> I'm curious: for what has this been used?

A replacement for the hard-codes values, but that's obvious, isn't it?
Probably I didn't understand your question.  Could you be more
specific, please?

Bye, Reiner.
-- 
       ,,,
      (o o)
---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/

Re: tex mode sub- and super-scripts

[Stefan Monnier]

>>> +(defcustom tex-font-script-display '((raise -0.3) . (raise 0.3))
>>> +  "Display specification for subscript and superscript content.
>>> +The car is used for subscript, the cdr is used for superscripts."
>>> +  :group 'tex
>>> +  :type '(cons (choice (sexp :tag "Subscript form")
>>> +		       (const :tag "No lowering" nil))
>>> +	       (choice (sexp :tag "Superscript form")
>>> +		       (const :tag "No raising" nil))))
>> 
>> I'm curious: for what has this been used?

> A replacement for the hard-codes values, but that's obvious, isn't it?
> Probably I didn't understand your question.  Could you be more
> specific, please?

Well, supposedly you/someone replaced those values by different ones, right?
So how did they differ?  Did only the 0.3 ever change or sometimes the whole
thing?  Did it always change symmetrically? ...

I mean the above variable can be used to make super/subscript display in
very wild ways, so I'm wondering if is a feature or a misfeature.


        Stefan

Re: tex mode sub- and super-scripts

[Reiner Steib]

On Thu, Jul 05 2007, Stefan Monnier wrote:

>>>> +(defcustom tex-font-script-display '((raise -0.3) . (raise 0.3))
[...]
> Well, supposedly you/someone replaced those values by different ones, right?
> So how did they differ?  Did only the 0.3 ever change or sometimes the whole
> thing?  Did it always change symmetrically? ...

Personally, I changed them to -0.1/0.1.  I don't know what others do.
But I think asymmetrical values are plausible.

> I mean the above variable can be used to make super/subscript display in
> very wild ways, so I'm wondering if is a feature or a misfeature.

I've installed a simplified version.  Feel free to modify it.

Bye, Reiner.
-- 
       ,,,
      (o o)
---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/

Re: tex mode sub- and super-scripts

[Stefan Monnier]

>>>>> +(defcustom tex-font-script-display '((raise -0.3) . (raise 0.3))
> [...]
>> Well, supposedly you/someone replaced those values by different ones, right?
>> So how did they differ?  Did only the 0.3 ever change or sometimes the whole
>> thing?  Did it always change symmetrically? ...

> Personally, I changed them to -0.1/0.1.  I don't know what others do.
> But I think asymmetrical values are plausible.

The value 0.3 was chosen pretty arbitrarily.  Maybe 0.2 would be
a better default.  In my case 0.1 seems too small (it move it by just
1 pixel, which looks more like a display bug than a feature).

>> I mean the above variable can be used to make super/subscript display in
>> very wild ways, so I'm wondering if is a feature or a misfeature.

> I've installed a simplified version.

Thanks,


        Stefan

Re: tex mode sub- and super-scripts

[Stefan Monnier]

> I just upgraded to Fedora 7, which means I got upgraded from
> emacs-21 to emacs-22. Now I find that when I edit a TeX file,
> all subscripts (TeX _{xxx}) and superscripts (TeX ^{xxx})
> are rendered in small type, lowered or raised on the line.

> Since TeX is a markup language not a WYSIWYG application
> this is not helpful to the readability of the TeX source.

Sorry!

> How do I switch off this new behavior, while keeping the syntactic
> color highlighting (font lock) that is helpful when composing TeX?

In Emacs's builtin tex-mode, there's no config var to do that.
You can do it with the following hack:

(eval-after-load "tex-mode" '(fset 'tex-font-lock-suscript 'ignore))

In AUCTeX (and Emacs-CVS thanks to AUCTeX's maintainer) you can do it by
customizing some faces and vars (e.g. superscript face and
tex-font-script-display var or something like that).


        Stefan "100% guilty of implementing this (mis)feature"