From: "Mattias Engdegård" <mattiase@acm.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: 46621@debbugs.gnu.org, "Simen Heggestøyl" <simenheg@runbox.com>,
"Juri Linkov" <juri@linkov.net>
Subject: bug#46621: Copy line
Date: Mon, 20 Jun 2022 11:26:18 +0200 [thread overview]
Message-ID: <181B4CC3-B934-45AE-A7E8-9AF2B70C302E@acm.org> (raw)
In-Reply-To: <871qvkvft6.fsf@gnus.org>
[-- Attachment #1: Type: text/plain, Size: 717 bytes --]
19 juni 2022 kl. 17.22 skrev Lars Ingebrigtsen <larsi@gnus.org>:
> No, it's consistent -- it always creates a new line.
Either behaviour can be seen as consistent. I suppose it's a matter of what behaviour we find more convenient.
It's expected to be a rare case and I have no strong opinion about it.
> It's edgy compared to what it's supposed to be doing -- duplicating
> lines.
Well, now it does more. Do you mean that you prefer it wouldn't, or that we change the name?
I have no strong opinion about the name but it would be a shame to make the command less useful.
Here is an updated patch that fixes a bug in the original code (would crash when called without an argument) and adds tests.
[-- Attachment #2: 0001-Make-duplicate-line-work-on-regions-bug-46621.patch --]
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From 8f210a9ee0f61c22a2b1996b1b61c7242e2372dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mattias=20Engdeg=C3=A5rd?= <mattiase@acm.org>
Date: Mon, 20 Jun 2022 11:16:26 +0200
Subject: [PATCH] Make duplicate-line work on regions (bug#46621)
With an active region, duplicate that region instead of the current
line. Rectangular regions are duplicated on the right-hand side.
* lisp/rect.el (rectangle--duplicate-right): New.
* lisp/misc.el (duplicate-line): Work on regions. Allow calls without
an argument.
* test/lisp/misc-tests.el (misc--duplicate-line): New test.
---
lisp/misc.el | 48 +++++++++++++++++++++++++++++++++++------
lisp/rect.el | 21 ++++++++++++++++++
test/lisp/misc-tests.el | 35 ++++++++++++++++++++++++++++++
3 files changed, 97 insertions(+), 7 deletions(-)
diff --git a/lisp/misc.el b/lisp/misc.el
index 3fb30e5372..906d6c2012 100644
--- a/lisp/misc.el
+++ b/lisp/misc.el
@@ -63,19 +63,53 @@ copy-from-above-command
(+ n (point)))))))
(insert string)))
+(declare-function rectangle--duplicate-right "rect" (n))
+
+;; `duplicate-line' preserves an active region and changes the buffer
+;; outside of it: disregard the region when immediately undoing the
+;; actions of this command.
+(put 'duplicate-line 'undo-inhibit-region t)
+
;;;###autoload
(defun duplicate-line (&optional n)
"Duplicate the current line N times.
+If the region is inactive, duplicate the current line.
+Otherwise, duplicate the region's contents. The region remains
+active afterwards.
+If the region is rectangular, duplicate on its right-hand side.
Interactively, N is the prefix numeric argument, and defaults to 1.
Also see the `copy-from-above-command' command."
(interactive "p")
- (let ((line (buffer-substring (line-beginning-position) (line-end-position))))
- (save-excursion
- (forward-line 1)
- (unless (bolp)
- (insert "\n"))
- (dotimes (_ n)
- (insert line "\n")))))
+ (unless n
+ (setq n 1))
+ (cond
+ ;; Duplicate rectangle.
+ ((bound-and-true-p rectangle-mark-mode)
+ (require 'rect)
+ (rectangle--duplicate-right n)
+ (setq deactivate-mark nil))
+
+ ;; Duplicate (contiguous) region.
+ ((use-region-p)
+ (let* ((beg (region-beginning))
+ (end (region-end))
+ (text (buffer-substring beg end)))
+ (save-excursion
+ (goto-char end)
+ (dotimes (_ n)
+ (insert text))))
+ (setq deactivate-mark nil))
+
+ ;; Duplicate line.
+ (t
+ (let ((line (buffer-substring (line-beginning-position)
+ (line-end-position))))
+ (save-excursion
+ (forward-line 1)
+ (unless (bolp)
+ (insert "\n"))
+ (dotimes (_ n)
+ (insert line "\n")))))))
;; Variation of `zap-to-char'.
diff --git a/lisp/rect.el b/lisp/rect.el
index e717d2ac7e..c41a545e85 100644
--- a/lisp/rect.el
+++ b/lisp/rect.el
@@ -931,6 +931,27 @@ rectangle--unhighlight-for-redisplay
(mapc #'delete-overlay (nthcdr 5 rol))
(setcar (cdr rol) nil)))
+(defun rectangle--duplicate-right (n)
+ "Duplicate the rectangular region N times on the right-hand side."
+ (let ((cols (rectangle--pos-cols (point) (mark))))
+ (apply-on-rectangle
+ (lambda (startcol endcol)
+ (let ((lines (list nil)))
+ (extract-rectangle-line startcol endcol lines)
+ (move-to-column endcol t)
+ (dotimes (_ n)
+ (insert (cadr lines)))))
+ (region-beginning) (region-end))
+ ;; Recompute the rectangle state; no crutches should be needed now.
+ (let ((p (point))
+ (m (mark)))
+ (rectangle--reset-crutches)
+ (goto-char m)
+ (move-to-column (cdr cols) t)
+ (set-mark (point))
+ (goto-char p)
+ (move-to-column (car cols) t))))
+
(provide 'rect)
;;; rect.el ends here
diff --git a/test/lisp/misc-tests.el b/test/lisp/misc-tests.el
index 236223ef49..2036488f13 100644
--- a/test/lisp/misc-tests.el
+++ b/test/lisp/misc-tests.el
@@ -80,5 +80,40 @@ misc-test-backward-to-word
(backward-to-word 3)
(should (equal (point) 1))))
+(ert-deftest misc--duplicate-line ()
+ ;; Duplicate a line (twice).
+ (with-temp-buffer
+ (insert "abc\ndefg\nh\n")
+ (goto-char 7)
+ (duplicate-line 2)
+ (should (equal (buffer-string) "abc\ndefg\ndefg\ndefg\nh\n"))
+ (should (equal (point) 7)))
+ ;; Duplicate a non-terminated line.
+ (with-temp-buffer
+ (insert "abc")
+ (goto-char 2)
+ (duplicate-line)
+ (should (equal (buffer-string) "abc\nabc\n"))
+ (should (equal (point) 2)))
+ ;; Duplicate a region.
+ (with-temp-buffer
+ (insert "abc\ndef\n")
+ (set-mark 2)
+ (goto-char 7)
+ (should (use-region-p))
+ (duplicate-line)
+ (should (equal (buffer-string) "abc\ndebc\ndef\n"))
+ (should (equal (point) 7)))
+ ;; Duplicate a rectangular region.
+ (with-temp-buffer
+ (insert "x\n>a\n>bcde\n>fg\nyz\n")
+ (goto-char 4)
+ (rectangle-mark-mode)
+ (goto-char 15)
+ (rectangle-forward-char 1)
+ (duplicate-line)
+ (should (equal (buffer-string) "x\n>a a \n>bcdbcde\n>fg fg \nyz\n"))
+ (should (equal (point) 24))))
+
(provide 'misc-tests)
;;; misc-tests.el ends here
--
2.32.0 (Apple Git-132)
next prev parent reply other threads:[~2022-06-20 9:26 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-18 19:07 bug#46621: Copy line Juri Linkov
2021-02-18 19:30 ` bug#46621: [External] : " Drew Adams
2021-02-20 6:58 ` Richard Stallman
2021-02-19 13:09 ` Lars Ingebrigtsen
2021-02-19 20:27 ` Daniel Martín via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-02-20 6:54 ` Eli Zaretskii
2021-02-20 13:05 ` Lars Ingebrigtsen
2021-02-20 13:12 ` Eli Zaretskii
2021-02-20 13:18 ` Lars Ingebrigtsen
2021-02-20 14:15 ` Eli Zaretskii
2021-02-20 14:35 ` Dmitry Gutov
2021-02-20 13:03 ` Lars Ingebrigtsen
2021-02-20 18:28 ` Juri Linkov
2021-02-21 6:16 ` Richard Stallman
2021-02-21 6:21 ` Richard Stallman
2021-02-21 8:54 ` Juri Linkov
2021-02-21 10:41 ` Eli Zaretskii
2021-02-21 13:12 ` Lars Ingebrigtsen
2021-02-21 13:19 ` Eli Zaretskii
2021-02-21 15:51 ` Lars Ingebrigtsen
2021-02-21 17:06 ` Eli Zaretskii
2021-02-21 17:39 ` Lars Ingebrigtsen
2021-02-21 18:00 ` bug#46621: [External] : " Drew Adams
2021-02-21 17:45 ` Drew Adams
2021-02-22 6:22 ` Richard Stallman
2021-02-21 17:41 ` bug#46621: [External] : " Drew Adams
2021-02-21 20:37 ` Juri Linkov
2021-02-21 22:06 ` bug#46621: [External] : " Drew Adams
2021-02-22 15:45 ` Eli Zaretskii
2021-02-21 23:04 ` Howard Melman
2021-02-22 6:23 ` Richard Stallman
2021-02-22 9:07 ` Juri Linkov
2021-02-22 15:43 ` Eli Zaretskii
2021-02-22 16:28 ` Helmut Eller
2021-02-22 16:58 ` Andreas Schwab
2021-02-22 18:32 ` Helmut Eller
2021-02-22 19:41 ` Howard Melman
2021-02-22 19:46 ` bug#46621: [External] : " Drew Adams
2021-02-23 19:29 ` Dmitry Gutov
2022-06-28 14:28 ` Drew Adams
2021-02-22 17:08 ` Eli Zaretskii
2021-02-22 18:42 ` Helmut Eller
2021-02-22 17:04 ` Gregory Heytings
2021-02-22 17:16 ` Eli Zaretskii
2021-02-22 17:54 ` Gregory Heytings
2021-02-22 20:51 ` Stephen Berman
2021-02-21 13:13 ` Lars Ingebrigtsen
2022-06-17 17:34 ` Lars Ingebrigtsen
2022-06-18 9:32 ` Simen Heggestøyl
2022-06-20 18:28 ` Richard Stallman
2022-06-18 18:02 ` Mattias Engdegård
2022-06-18 18:09 ` Eli Zaretskii
2022-06-19 15:02 ` Mattias Engdegård
2022-07-03 17:21 ` Mattias Engdegård
2022-07-04 3:24 ` Pankaj Jangid
2022-07-05 16:02 ` Mattias Engdegård
2022-07-05 16:52 ` Lars Ingebrigtsen
2022-07-05 20:19 ` Mattias Engdegård
2022-06-19 11:43 ` Lars Ingebrigtsen
2022-06-19 15:20 ` Mattias Engdegård
2022-06-19 15:22 ` Lars Ingebrigtsen
2022-06-20 9:26 ` Mattias Engdegård [this message]
2022-06-21 10:35 ` Lars Ingebrigtsen
2022-06-21 11:13 ` Mattias Engdegård
2022-06-22 4:11 ` Lars Ingebrigtsen
2022-06-21 17:41 ` Juri Linkov
2022-06-22 4:07 ` Lars Ingebrigtsen
2022-06-22 7:28 ` Juri Linkov
2022-06-22 7:54 ` Lars Ingebrigtsen
2022-06-22 17:21 ` Pankaj Jangid
2022-06-22 18:24 ` Juri Linkov
2022-06-22 18:45 ` Lars Ingebrigtsen
2022-06-23 7:49 ` Lars Ingebrigtsen
2022-06-23 8:08 ` Pankaj Jangid
2022-06-23 8:17 ` Andreas Schwab
2022-06-23 9:05 ` Lars Ingebrigtsen
2022-07-06 17:34 ` Juri Linkov
2022-07-07 7:58 ` Lars Ingebrigtsen
2022-07-07 16:45 ` Juri Linkov
2022-07-07 18:03 ` Lars Ingebrigtsen
2022-07-07 18:20 ` Juri Linkov
2022-07-07 18:24 ` Lars Ingebrigtsen
2022-07-08 17:10 ` Juri Linkov
2022-07-10 12:57 ` Lars Ingebrigtsen
2022-07-14 17:16 ` Juri Linkov
2022-07-14 17:47 ` Andreas Schwab
2022-07-14 19:30 ` Juri Linkov
2022-06-23 9:22 ` Robert Pluim
2022-06-23 11:16 ` Pankaj Jangid
2022-06-23 11:34 ` Lars Ingebrigtsen
2022-06-23 9:04 ` Lars Ingebrigtsen
2022-06-23 11:12 ` Pankaj Jangid
2022-06-23 15:10 ` Mattias Engdegård
2022-06-23 15:20 ` Lars Ingebrigtsen
2022-06-25 16:35 ` Mattias Engdegård
2022-06-23 17:35 ` Juri Linkov
2022-06-23 17:49 ` Drew Adams
2022-06-25 16:51 ` Mattias Engdegård
2022-06-25 17:48 ` Drew Adams
2022-06-27 19:40 ` Juri Linkov
2022-06-28 8:41 ` Mattias Engdegård
2022-06-28 12:10 ` Helmut Eller
2022-06-22 14:10 ` Drew Adams
2022-06-22 17:27 ` Pankaj Jangid
2022-06-22 20:44 ` Sean Whitton
2022-06-22 20:50 ` Drew Adams
2022-06-23 15:47 ` Helmut Eller
2022-06-23 16:07 ` Eli Zaretskii
2022-06-23 17:46 ` Drew Adams
2022-06-23 5:47 ` Eli Zaretskii
2022-06-23 17:00 ` Sean Whitton
2022-06-23 17:37 ` Sean Whitton
2022-06-23 18:31 ` Eli Zaretskii
2022-06-30 16:31 ` Sean Whitton
2022-07-01 9:27 ` Lars Ingebrigtsen
2022-07-01 16:34 ` Sean Whitton
[not found] <87a6aal3l5.fsf@simenheg@gmail.com>
2022-06-18 12:56 ` Lars Ingebrigtsen
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