Re: [AUCTeX] A bug to add a pair of braces and more?

[Ralf Angeli]

* Adam Johnson (2006-11-01) writes:

> When I first select a region like "abc" forward from 'a' to 'c', and then 
> use C-c C-{, a pair of {} was added around "abc" so it becomes "{abc}".  If 
> I select the same region backwards from 'c' to 'a', the same operation 
> produces something like "}abc{", which, in general, is meaningless.

This has been fixed in CVS for quite some time.

> Just a thought, can you please produce any operation to delete a pair of 
> braces, that is to change "{blabla}" to "blabla"?  In general, an extra pair 
> of "{}" will not affect anything, but I'd like to keep my document as neat 
> as possible.  (that is, without extra things like this in the document.)

How about the following function?

(defun TeX-remove-braces ()
  "Remove a pair of braces.
Braces are only removed if point is between a matching pair of
them.  The function does nothing if this is not the case."
  (interactive)
  (let ((opening-brace (TeX-find-opening-brace))
        (closing-brace (TeX-find-closing-brace)))
    (when (and opening-brace closing-brace)
      (delete-region (1- closing-brace) closing-brace)
      (delete-region opening-brace (1+ opening-brace)))))

I should probably write a function which returns both the opening and
the closing brace in one go.

And here is something if you want to remove a whole macro:

(defun TeX-remove-macro ()
  "Remove a single-argument TeX macro leaving its argument untouched."
  (interactive)
  (let ((macro-start (TeX-find-macro-start))
        (macro-end (TeX-find-macro-end))
        opening-brace)
    (when (and macro-start macro-end)
      (save-excursion
        (goto-char (1- macro-end))
        (setq opening-brace (TeX-find-opening-brace)))
      (delete-region (1- macro-end) macro-end)
      (delete-region macro-start (1+ opening-brace)))))

-- 
Ralf