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From: Ihor Radchenko <yantar92@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: larsi@gnus.org, Stefan Kangas <stefankangas@gmail.com>,
	arthur.miller@live.com, emacs-devel@gnu.org
Subject: Re: Patch proposal: display symbol source code in help buffers
Date: Tue, 21 Sep 2021 17:17:19 +0800	[thread overview]
Message-ID: <87r1diqodc.fsf@localhost> (raw)
In-Reply-To: <83r1diz5k9.fsf@gnu.org>

[-- Attachment #1: Type: text/plain, Size: 682 bytes --]

Eli Zaretskii <eliz@gnu.org> writes:

>> Ihor Radchenko <yantar92@gmail.com> writes:
>> 
>> > I like this idea. Maybe we can simply change the default value of
>> > find-function-after-hook like in the attached patch?
>> 
>> We generally prefer not to add hooks like this if we can avoid it.  We
>> can usually just change the code instead.
>> 
>> For example, in this case maybe we could just call `push-mark' at the
>> end of `help-function-def--button-function'.
>
> Indeed, especially since the proposed change to find-func.el would
> affect all users of that package.

Agree. I updated the patch and also added support for
widen-automatically variable. See below.

Best,
Ihor


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From e94ae3711796679e330637921b980f970b9d7025 Mon Sep 17 00:00:00 2001
Message-Id: <e94ae3711796679e330637921b980f970b9d7025.1632215537.git.yantar92@gmail.com>
From: Ihor Radchenko <yantar92@gmail.com>
Date: Tue, 21 Sep 2021 17:00:50 +0800
Subject: [PATCH 1/2] Save position in mark ring before jumping to definition

* lisp/help-mode.el (help-function-def--button-function): Current
point is saved in the mark ring before jumping to definition.

Following up:
https://lists.gnu.org/archive/html/emacs-devel/2021-09/msg01561.html
---
 etc/NEWS          | 3 +++
 lisp/help-mode.el | 1 +
 2 files changed, 4 insertions(+)

diff --git a/etc/NEWS b/etc/NEWS
index 2bdcb6434b..2132e8babc 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -648,7 +648,10 @@ clicking the "X" icon in the tool bar.
 
 ---
 *** 'g' ('revert-buffer') in 'help-mode' no longer requires confirmation.
+*** Jumping to function/variable source now saves mark before moving point
+Jumping to source from "*Help*" buffer moves the point when the source buffer is already open.  Now, the old point is pushed to mark ring.
 
+---
 ** File Locks
 
 +++
diff --git a/lisp/help-mode.el b/lisp/help-mode.el
index 551cf7e1a3..57655db337 100644
--- a/lisp/help-mode.el
+++ b/lisp/help-mode.el
@@ -268,6 +268,7 @@ help-function-def--button-function
             (when (or (< position (point-min))
                       (> position (point-max)))
               (widen))
+            (push-mark nil t)
             (goto-char position))
         (message "Unable to find location in file")))))
 
-- 
2.32.0


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From 109bd7192b5b672508b9fa1d53c10a5a8aec3846 Mon Sep 17 00:00:00 2001
Message-Id: <109bd7192b5b672508b9fa1d53c10a5a8aec3846.1632215537.git.yantar92@gmail.com>
In-Reply-To: <e94ae3711796679e330637921b980f970b9d7025.1632215537.git.yantar92@gmail.com>
References: <e94ae3711796679e330637921b980f970b9d7025.1632215537.git.yantar92@gmail.com>
From: Ihor Radchenko <yantar92@gmail.com>
Date: Tue, 21 Sep 2021 17:10:10 +0800
Subject: [PATCH 2/2] Honor widen-automatically in
 help-function-def--button-function

* lisp/help-mode.el (help-function-def--button-function): Ask user to
widen the buffer when `widen-automatically' is set to nil.
---
 lisp/help-mode.el | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lisp/help-mode.el b/lisp/help-mode.el
index 57655db337..5d566ca083 100644
--- a/lisp/help-mode.el
+++ b/lisp/help-mode.el
@@ -263,11 +263,14 @@ help-function-def--button-function
       (pop-to-buffer (car location))
       (run-hooks 'find-function-after-hook)
       (if position
-          (progn
+          (catch :exit
             ;; Widen the buffer if necessary to go to this position.
             (when (or (< position (point-min))
                       (> position (point-max)))
-              (widen))
+              (if (or widen-automatically
+                      (yes-or-no-p "The location is outside narrowing. Widen? "))
+                  (widen)
+                (throw :exit nil)))
             (push-mark nil t)
             (goto-char position))
         (message "Unable to find location in file")))))
-- 
2.32.0


  reply	other threads:[~2021-09-21  9:17 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-19 19:50 Patch proposal: display symbol source code in help buffers Arthur Miller
2021-09-20  5:46 ` Lars Ingebrigtsen
2021-09-20  6:09   ` Stefan Kangas
2021-09-20  6:14     ` Lars Ingebrigtsen
2021-09-20  7:17       ` Ihor Radchenko
2021-09-20  7:43         ` Stefan Kangas
2021-09-20  8:29           ` martin rudalics
2021-09-20  9:04           ` Ihor Radchenko
2021-09-20 23:45             ` Arthur Miller
2021-09-21  4:16             ` Lars Ingebrigtsen
2021-09-21  6:59               ` Ihor Radchenko
2021-09-21  7:41                 ` Stefan Kangas
2021-09-21  8:38                   ` Eli Zaretskii
2021-09-21  9:17                     ` Ihor Radchenko [this message]
2021-09-21 16:49                       ` Lars Ingebrigtsen
2021-10-01  7:05                         ` Ihor Radchenko
2021-10-01  7:09                           ` Lars Ingebrigtsen
2021-10-01  7:21                             ` Ihor Radchenko
2021-10-01  7:21                               ` Lars Ingebrigtsen
2021-10-01  9:04                                 ` Ihor Radchenko
2021-10-01 12:20                                   ` Lars Ingebrigtsen
2021-10-01  7:24                           ` Eli Zaretskii
2021-10-01  9:08                             ` Ihor Radchenko
2021-10-01 10:24                               ` Eli Zaretskii
2021-10-01 14:14                                 ` Ihor Radchenko
2021-09-21  8:34               ` martin rudalics
2021-09-20 15:01           ` Arthur Miller
2021-09-21  7:41             ` Stefan Kangas
2021-09-20 15:27         ` Arthur Miller
2021-09-20  6:47     ` Eli Zaretskii
2021-09-20 15:27       ` Arthur Miller
2021-09-20 14:55     ` Arthur Miller
2021-09-21  4:18       ` Lars Ingebrigtsen
2021-09-21 10:26         ` Arthur Miller
2021-09-20 15:23   ` Arthur Miller
2021-09-20  5:59 ` Eli Zaretskii
2021-09-20  6:37   ` Gregor Zattler
2021-09-20  7:01     ` Eli Zaretskii
2021-09-20 15:21       ` Arthur Miller
2021-09-20  8:21     ` martin rudalics
2021-09-20 18:13       ` Arthur Miller
2021-09-21  8:34         ` martin rudalics
2021-09-21 10:24           ` Arthur Miller
2021-09-21 16:52             ` martin rudalics
2021-09-21 18:56               ` Arthur Miller
2021-09-21 17:30           ` Juri Linkov
2021-09-21 19:13             ` Arthur Miller
2021-09-22  7:49               ` martin rudalics
2021-09-22 16:04                 ` Juri Linkov
2021-09-22 17:52                   ` martin rudalics
2021-09-23  8:15                     ` martin rudalics
2021-09-23 15:52                       ` Juri Linkov
2021-09-26  9:10                         ` martin rudalics
2021-09-22 22:38                 ` Arthur Miller
2021-09-23  8:22                   ` martin rudalics
2021-09-20 12:19     ` Dmitry Gutov
2021-09-20 15:13       ` Arthur Miller
2021-09-20 15:11   ` Arthur Miller

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