GNU bug report logs - #36385
Missing delete-selection-mode annotations on some regions

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From: Clément Pit-Claudel <cpitclaudel <at> gmail.com>
To: 36385 <at> debbugs.gnu.org
Subject: bug#36385: Missing delete-selection-mode annotations on some regions
Date: Tue, 25 Jun 2019 21:29:51 -0400

Hi there,

AucTeX rebinds some keys normally bound to self-insert-command, but doesn't put the appropriate 'delete-selection properties on the corresponding commands.  As a result, when in delete-selection-mode, selecting some text and pressing '{' doesn't replace the selected text (instead, it inserts '{' next to it).

Here is what delsel.el says:
  
;; Commands which will delete the selection need a 'delete-selection
;; property on their symbols; commands which insert text but don't
;; have this property won't delete the selection.  It can be one of
;; the values:
;;  `yank'
;;      For commands which do a yank; ensures the region about to be
;;      deleted isn't immediately yanked back, which would make the
;;      command a no-op.
;;  `supersede'
;;      Delete the active region and ignore the current command,
;;      i.e. the command will just delete the region.  This is for
;;      commands that normally delete small amounts of text, like
;;      a single character -- they will instead delete the whole
;;      active region.
;;  `kill'
;;      `kill-region' is used on the selection, rather than
;;      `delete-region'.  (Text selected with the mouse will typically
;;      be yankable anyhow.)
;;  t
;;      The normal case: delete the active region prior to executing
;;      the command which will insert replacement text.
;;  FUNCTION
;;      For commands which need to dynamically determine this behavior.
;;      FUNCTION should take no argument and return one of the above
;;      values, or nil.  In the latter case, FUNCTION should itself
;;      do with the active region whatever is appropriate."

Emacs  : GNU Emacs 27.0.50 (build 4, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2019-05-14
Package: 12.1.2

current state:
==============
(setq
 AUCTeX-date "2019-02-08"
 window-system 'x
 LaTeX-version "2e"
 TeX-style-path '("~/.emacs.d/auctex" "/home/clement/.emacs.d/.cask/27.0/elpa/auctex-12.1.2/style" "/home/clement/.emacs.d/auctex/auto"
                  "/home/clement/.emacs.d/auctex/style" "auto" "style")
 TeX-auto-save t
 TeX-parse-self t
 TeX-master t)

Cheers,
Clément.

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