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From: Gregory Heytings <gregory@heytings.org>
To: Juri Linkov <juri@linkov.net>
Cc: Ergus <spacibba@aol.com>, emacs-devel@gnu.org
Subject: Re: Simple isearch concerns
Date: Tue, 06 Apr 2021 00:30:25 +0000	[thread overview]
Message-ID: <acf6f0cd7e9d21e6c35b@heytings.org> (raw)
In-Reply-To: <878s5wmsjp.fsf@mail.linkov.net>

[-- Attachment #1: Type: text/plain, Size: 939 bytes --]


>> 1) Are there any option to move the cursor to the start of the 
>> candidate after the search? I see that there is an isearch-other-end. 
>> But it is not a custom but an internal variable. Now I am using a hook 
>> but it seems a bit hacky.
>
> As you see from the discussion, adding a defcustom makes little sense, 
> because this feature might be needed only occasionally, so better to be 
> bound to a special key, e.g. C-RET to exit and move to other-end, S-RET 
> to exit and mark the found string as a region.
>

Note that neither C-RET nor S-RET are available in a terminal.

What I consider to be the most useful feature of CTRLF, namely the 
possibility to scroll among the matches, has not much been discussed so 
far, alas.  I attach a short patch which implements that feature in 
isearch.  I've been using it for a day, and I'm convinced it's a 
must-have, it makes navigating among the search matches much faster. 
WDYT?

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From a1dd7f1f93f0a2b74c7f9e43d97f5b5f09e16b69 Mon Sep 17 00:00:00 2001
From: Gregory Heytings <gregory@heytings.org>
Date: Tue, 6 Apr 2021 00:17:39 +0000
Subject: [PATCH] New user option to scroll isearch matches

* lisp/isearch.el (isearch-allow-match-scroll): New user option.
(isearch-scroll-up, isearch-scroll-down): New commands to scroll
the current search match, that complement the existing
isearch-beginning-of-buffer and isearch-end-of-buffer commands.
(isearch-pre-command-hook): Handle the new option and commands.

* etc/NEWS: Mention the new user option.

* doc/emacs/search.texi: Document the new user option.
---
 doc/emacs/search.texi |  8 ++++++++
 etc/NEWS              |  8 ++++++++
 lisp/isearch.el       | 47 ++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/doc/emacs/search.texi b/doc/emacs/search.texi
index f3c42bcea7..6c161d4c58 100644
--- a/doc/emacs/search.texi
+++ b/doc/emacs/search.texi
@@ -587,6 +587,14 @@ Not Exiting Isearch
 an incremental search.  This feature is disabled if
 @code{isearch-allow-scroll} is @code{nil} (which it is by default).
 
+@vindex isearch-allow-match-scroll
+  Likewise, if you change the variable @code{isearch-allow-match-scroll}
+to a non-@code{nil} value, this enables the use of the keyboard scrolling
+commands @kbd{C-v},  @kbd{M-v}, @kbd{M-<} and @kbd{M->} to move
+respectively to the first first occurrence of the current search
+string in the buffer, the last one, the first one after the current
+window, and the last one before the current window.
+
 @item Motion Commands
 @cindex motion commands, during incremental search
 When @code{isearch-yank-on-move} is customized to @code{shift},
diff --git a/etc/NEWS b/etc/NEWS
index c8400ba8c2..411ea72e7c 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -367,6 +367,14 @@ trying to be non-destructive.
 This command opens a new buffer called "*Memory Report*" and gives a
 summary of where Emacs is using memory currently.
 
++++
+** New user option 'isearch-allow-match-scroll'.
+When this option is set, the commands 'beginning-of-buffer',
+'end-of-buffer', 'scroll-up-command' and 'scroll-down-command' move
+respectively to the first first occurrence of the current search
+string in the buffer, the last one, the first one after the current
+window, and the last one before the current window.
+
 ** Outline
 
 +++
diff --git a/lisp/isearch.el b/lisp/isearch.el
index 943e24aa56..bdb2f147ab 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -1942,6 +1942,23 @@ isearch-end-of-buffer
     (goto-char (point-max))
     (isearch-repeat 'backward arg)))
 
+(defun isearch-scroll-up ()
+  "Go to the first occurrence of the current search string after window.
+Move point to the end of the window, and search forward."
+  (interactive)
+  (setq isearch-just-started t)
+  (goto-char (window-end))
+  (isearch-repeat 'forward))
+
+(defun isearch-scroll-down ()
+  "Go to the first occurrence of the current search string before window.
+Move point to the beginning of the window, recenter it, and search backward."
+  (interactive)
+  (setq isearch-just-started t)
+  (goto-char (window-start))
+  (recenter nil t)
+  (isearch-repeat 'backward))
+
 \f
 ;;; Toggles for `isearch-regexp-function' and `search-default-mode'.
 (defmacro isearch-define-mode-toggle (mode key function &optional docstring &rest body)
@@ -2840,12 +2857,35 @@ isearch-allow-scroll
 However, you cannot scroll far enough that the current match is
 no longer visible (is off screen).  But if the value is `unlimited'
 that limitation is removed and you can scroll any distance off screen.
-If nil, scrolling commands exit Isearch mode."
+If nil, scrolling commands exit Isearch mode.
+See also the related option `isearch-allow-match-scroll'."
   :type '(choice (const :tag "Scrolling exits Isearch" nil)
                  (const :tag "Scrolling with current match on screen" t)
                  (const :tag "Scrolling with current match off screen" unlimited))
   :group 'isearch)
 
+(put 'beginning-of-buffer 'isearch-match-scroll t)
+(put 'end-of-buffer 'isearch-match-scroll t)
+(put 'scroll-up-command 'isearch-match-scroll t)
+(put 'scroll-down-command 'isearch-match-scroll t)
+
+(put 'beginning-of-buffer 'isearch-match-scroll-command 'isearch-beginning-of-buffer)
+(put 'end-of-buffer 'isearch-match-scroll-command 'isearch-end-of-buffer)
+(put 'scroll-up-command 'isearch-match-scroll-command 'isearch-scroll-up)
+(put 'scroll-down-command 'isearch-match-scroll-command 'isearch-scroll-down)
+
+(defcustom isearch-allow-match-scroll nil
+  "Whether scrolling to another match is allowed during incremental search.
+If non-nil, the four scrolling commands `beginning-of-buffer',
+`end-of-buffer', `scroll-up-command' and `scroll-down-command' move
+respectively to the first first occurrence of the current search string in
+the buffer, the last one, the first one after the current window, and the
+last one before the current window.
+See also the related option `isearch-allow-scroll'."
+  :type '(choice (const :tag "Off" nil)
+                 (const tag "On" t))
+  :group 'isearch)
+
 (defcustom isearch-allow-prefix t
   "Whether prefix arguments are allowed during incremental search.
 If non-nil, entering a prefix argument will not terminate the
@@ -2947,6 +2987,11 @@ isearch-pre-command-hook
      ;; Optionally edit the search string instead of exiting.
      ((eq search-exit-option 'edit)
       (setq this-command 'isearch-edit-string))
+     ;; Handle match scrolling functions
+     ((and isearch-allow-match-scroll
+           (symbolp this-command)
+           (eq (get this-command 'isearch-match-scroll) t))
+      (setq this-command (get this-command 'isearch-match-scroll-command)))
      ;; Handle a scrolling function or prefix argument.
      ((or (and isearch-allow-prefix
                (memq this-command '(universal-argument universal-argument-more
-- 
2.30.2


  parent reply	other threads:[~2021-04-06  0:30 UTC|newest]

Thread overview: 143+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210403001539.x4rb55dvh46rmhb3.ref@Ergus>
2021-04-03  0:15 ` Simple isearch concerns Ergus
2021-04-03  5:56   ` Thierry Volpiatto
2021-04-03  6:33   ` Manuel Uberti
2021-04-03 10:37     ` Daniel Martín
2021-04-06  7:12       ` Zhiwei Chen
2021-04-06 13:04         ` Stefan Monnier
2021-04-06 13:18           ` Gregory Heytings
2021-04-06 14:17             ` Gregory Heytings
2021-04-06 18:56               ` Juri Linkov
2021-04-06 20:10                 ` Gregory Heytings
2021-04-07 10:22                   ` Gregory Heytings
2021-04-07 16:24                     ` Juri Linkov
2021-04-07 17:03                       ` Gregory Heytings
2021-04-08 19:08                         ` Juri Linkov
2021-04-09  6:42                           ` Zhiwei Chen
2021-04-21 17:51         ` Juri Linkov
2021-04-25  8:16           ` Zhiwei Chen
2021-04-03 11:28     ` Philip Kaludercic
2021-04-03 12:26       ` Gregory Heytings
2021-04-03 16:37         ` Philip Kaludercic
2021-04-03 17:31           ` Gregory Heytings
2021-04-03 18:36             ` Philip Kaludercic
2021-04-03 19:36               ` Dmitry Gutov
2021-04-05  2:18                 ` Ergus
2021-04-05  8:39                   ` Juri Linkov
2021-04-03 17:45           ` Ergus
2021-04-22  7:15             ` Augusto Stoffel
2021-04-22 22:24               ` Juri Linkov
2021-04-25  7:15                 ` Augusto Stoffel
2021-04-25 17:24                   ` Juri Linkov
2021-04-25 18:41                     ` [External] : " Drew Adams
2021-04-26  5:39                     ` Augusto Stoffel
2021-04-27 17:41                       ` Juri Linkov
2021-04-29 16:29                         ` Juri Linkov
2021-04-29 17:50                           ` Augusto Stoffel
2021-04-29 23:00                             ` Juri Linkov
2021-04-30  7:07                               ` Augusto Stoffel
2021-04-30 16:41                                 ` Juri Linkov
2021-05-02  6:09                                   ` Augusto Stoffel
2021-05-02 22:18                                     ` Juri Linkov
2021-05-03  5:30                                       ` Augusto Stoffel
2021-05-03 16:51                                         ` Juri Linkov
2021-05-05 20:52                                           ` Juri Linkov
2021-05-07 17:14                                             ` Juri Linkov
2021-05-08 10:17                                               ` Augusto Stoffel
2021-05-09 19:12                                                 ` Juri Linkov
2021-05-09 19:53                                                   ` [External] : " Drew Adams
2021-05-10 21:11                                                     ` Juri Linkov
2021-05-10 23:06                                                       ` Drew Adams
2021-05-11 18:32                                                         ` Juri Linkov
2021-05-11 20:01                                                           ` Drew Adams
2021-05-11  6:20                                                       ` Yuri Khan
2021-05-11  9:01                                                         ` Augusto Stoffel
2021-05-11 18:37                                                         ` Juri Linkov
2021-05-11 20:56                                           ` Juri Linkov
2021-04-03 12:29       ` Gregory Heytings
2021-04-03 13:02         ` Daniel Martín
2021-04-03 13:25           ` Gregory Heytings
2021-04-03 17:25         ` Ergus
2021-04-03 10:28   ` Daniel Martín
2021-04-04 22:48   ` Juri Linkov
2021-04-04 23:27     ` Stefan Monnier
2021-04-05  1:41       ` Ergus
2021-04-05  2:22         ` [External] : " Drew Adams
2021-04-05  8:34           ` Juri Linkov
2021-04-05 14:58             ` Drew Adams
2021-04-05  2:38         ` Stefan Monnier
2021-04-05  8:30           ` Juri Linkov
2021-04-05  9:52           ` Basil L. Contovounesios
2021-04-05 15:08             ` [External] : " Drew Adams
2021-04-05  2:08     ` Ergus
2021-04-05 20:37   ` Juri Linkov
2021-04-05 21:18     ` [External] : " Drew Adams
2021-04-05 21:35       ` Juri Linkov
2021-04-05 22:37         ` Ergus
2021-04-06 19:11           ` Juri Linkov
2021-04-06 19:30             ` Eli Zaretskii
2021-04-06 20:10               ` Gregory Heytings
2021-04-07 16:30                 ` Juri Linkov
2021-04-07 17:14                   ` Gregory Heytings
2021-04-07 20:12             ` Gregory Heytings
2021-04-05 23:06         ` Drew Adams
2021-04-05 22:16     ` Ergus
2021-04-06 19:17       ` Juri Linkov
2021-04-06  0:30     ` Gregory Heytings [this message]
2021-04-06  0:44       ` Gregory Heytings
2021-04-06 18:53         ` Juri Linkov
2021-04-06 20:10           ` Gregory Heytings
2021-04-07 16:36             ` Juri Linkov
2021-04-07 17:21               ` Gregory Heytings
2021-04-07 20:12                 ` Juri Linkov
2021-04-07 21:09                   ` Gregory Heytings
2021-04-08  8:08                     ` Juri Linkov
2021-04-08  8:48                       ` Gregory Heytings
2021-04-08 19:12                         ` Juri Linkov
2021-04-08 19:27                           ` Gregory Heytings
2021-04-08 20:05                             ` Juri Linkov
2021-04-08 20:10                               ` Gregory Heytings
2021-04-08 22:40                               ` Gregory Heytings
2021-04-09  6:22                                 ` Eli Zaretskii
2021-04-09  7:20                                   ` Gregory Heytings
2021-04-09  8:37                                     ` Juri Linkov
2021-04-09 10:50                                       ` Eli Zaretskii
2021-04-09 16:49                                         ` Juri Linkov
2021-04-09 10:46                                     ` Eli Zaretskii
2021-04-09 11:27                                       ` Gregory Heytings
2021-04-09 12:45                                         ` Eli Zaretskii
2021-04-09  6:05                               ` Eli Zaretskii
2021-04-09  8:39                                 ` Juri Linkov
2021-04-09 10:51                                   ` Eli Zaretskii
2021-04-09 11:48                                     ` Gregory Heytings
2021-04-09 12:48                                       ` Eli Zaretskii
2021-04-09 13:26                                         ` Gregory Heytings
2021-04-09 13:49                                           ` Eli Zaretskii
2021-04-09 14:36                                             ` Gregory Heytings
2021-04-09 14:56                                               ` Eli Zaretskii
2021-04-09 15:25                                                 ` Gregory Heytings
2021-04-09 19:01                                                   ` Eli Zaretskii
2021-04-09 19:04                                                     ` [External] : " Drew Adams
2021-04-09 23:18                                                     ` Gregory Heytings
2021-04-10  7:17                                                       ` Eli Zaretskii
2021-04-10 10:36                                                         ` Gregory Heytings
2021-04-10 10:46                                                           ` Eli Zaretskii
2021-04-10 10:57                                                             ` Gregory Heytings
2021-04-10 11:13                                                               ` Eli Zaretskii
2021-04-10 19:02                                                               ` Now branch isearch-vertical Ergus
2021-04-10 20:00                                                                 ` Gregory Heytings
2021-04-10 22:12                                                               ` Simple isearch concerns Juri Linkov
2021-04-10 23:55                                                                 ` Gregory Heytings
2021-04-11  7:07                                                                 ` Eli Zaretskii
2021-04-11  8:49                                                                   ` Gregory Heytings
2021-04-11 10:16                                                                     ` Gregory Heytings
2021-04-11 22:09                                                                       ` Juri Linkov
2021-04-11 22:17                                                                       ` Juri Linkov
2021-04-11 23:06                                                                         ` Gregory Heytings
2021-04-11 22:05                                                                   ` Juri Linkov
2021-04-08  3:32                   ` Ergus
2022-03-03 16:36                   ` Augusto Stoffel
2022-03-03 17:50                     ` Alan Mackenzie
2022-03-03 18:39                       ` Augusto Stoffel
2022-03-03 18:46                         ` Eli Zaretskii
2021-04-07 16:41             ` Howard Melman
2021-04-06  2:21       ` Ergus

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