Plegado de código para LaTeX en Emacs

Question

¿Hay un modo menor de Emacs (o un fragmento de código elisp) que le permite ocultar/mostrar selectivamente entornos mientras está en modo LaTeX? Por ejemplo, me gustaría moverme al comienzo de un largo bloque \begin{figure}, presionar una tecla y tener el contenido de ese entorno de figura oculto a la vista. Del mismo modo con \begin{proof} y así sucesivamente, e idealmente incluso con \subsection s.

¿Esto es posible? Acabo de probar hs-minor-mode, allout-mode y outline-minor-mode, pero la mayoría de ellos no reconocen los entornos de LaTeX, p. hs-minor-mode falla con "error de escaneo: paréntesis desbalanceados". Preferiría no tener que ingresar marcas de doblado explícitas como {{{como en folding-mode.

[Lo ideal sería grande si el plegamiento fueron persistent, pero veo que esa pregunta no tiene una respuesta aceptado todavía.]

Answer 1

AUCTeX hace plegado: http://www.gnu.org/software/auctex/manual/auctex.html#Folding

A popular complaint about markup languages like TeX and LaTeX is that there is too much clutter in the source text and that one cannot focus well on the content. There are macros where you are only interested in the content they are enclosing, like font specifiers where the content might already be fontified in a special way by font locking. Or macros the content of which you only want to see when actually editing it, like footnotes or citations. Similarly you might find certain environments or comments distracting when trying to concentrate on the body of your document.

With AUCTeX’s folding functionality you can collapse those items and replace them by a fixed string, the content of one of their arguments, or a mixture of both. If you want to make the original text visible again in order to view or edit it, move point sideways onto the placeholder (also called display string) or left-click with the mouse pointer on it. (The latter is currently only supported on Emacs.) The macro or environment will unfold automatically, stay open as long as point is inside of it and collapse again once you move point out of it. (Note that folding of environments currently does not work in every AUCTeX mode.)

In order to use this feature, you have to activate TeX-fold-mode which will activate the auto-reveal feature and the necessary commands to hide and show macros and environments. You can activate the mode in a certain buffer by typing the command M-x TeX-fold-mode RET or using the keyboard shortcut C-c C-o C-f . If you want to use it every time you edit a LaTeX document, add it to a hook:

(add-hook 'LaTeX-mode-hook (lambda() 
          (TeX-fold-mode 1))) 

If it should be activated in all AUCTeX modes, use TeX-mode-hook instead of LaTeX-mode-hook .

Once the mode is active there are several commands available to hide and show macros, environments and comments...