Commit 35954cb9 authored by Tino Calancha's avatar Tino Calancha

register-read-with-preview: Quit if user input C-g or ESC

* lisp/register.el (register-read-with-preview):
Quit if user input C-g or ESC (bug#27634).
* doc/emacs/regs.texi (Registers): Update manual.
* test/lisp/register-tests.el (register-test-bug27634): Add test.
parent 32daa3cb
......@@ -15,7 +15,10 @@ jump back to that position once, or many times.
Each register has a name that consists of a single character, which
we will denote by @var{r}; @var{r} can be a letter (such as @samp{a})
or a number (such as @samp{1}); case matters, so register @samp{a} is
not the same as register @samp{A}.
not the same as register @samp{A}. You can also set a register in
non-alphanumeric characters, for instance @samp{*} or @samp{C-d}.
Note, it's not possible to set a register in @samp{C-g} or @samp{ESC},
because these keys are reserved to terminate interactive commands.
@findex view-register
A register can store a position, a piece of text, a rectangle, a
......@@ -164,6 +164,10 @@ display such a window regardless."
(unless (get-buffer-window buffer)
(register-preview buffer 'show-empty)))
(when (or (eq ?\C-g last-input-event)
(eq 'escape last-input-event)
(eq ?\C-\[ last-input-event))
(if (characterp last-input-event) last-input-event
(error "Non-character input-event")))
(and (timerp timer) (cancel-timer timer))
;;; register-tests.el --- tests for register.el -*- lexical-binding: t-*-
;; Copyright (C) 2017 Free Software Foundation, Inc.
;; Author: Tino Calacha <>
;; Keywords:
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <>.
;;; Commentary:
;;; Code:
(require 'ert)
(require 'cl-lib)
(ert-deftest register-test-bug27634 ()
"Test for ."
(dolist (event (list ?\C-g 'escape ?\C-\[))
(cl-letf (((symbol-function 'read-key) #'ignore)
(last-input-event event)
(register-alist nil))
(should (equal 'quit
(condition-case err
(call-interactively 'point-to-register)
(quit (car err)))))
(should-not register-alist))))
(provide 'register-tests)
;;; register-tests.el ends here
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