* bug#31061: 27.0.50; next-page of page-ext non-functional in dired
@ 2018-04-04 14:24 Marco Wahl
2018-04-25 1:51 ` Noam Postavsky
0 siblings, 1 reply; 6+ messages in thread
From: Marco Wahl @ 2018-04-04 14:24 UTC (permalink / raw)
To: 31061
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Precondition:
- Have a dired with several subdirectories open.
Action:
- C-x C-p C-n
Expectation:
- The dired buffer narrows to the next subdirectory.
Observation:
- The dired buffer narrows to the current subdirectory.
Proposition for a fix should be attached.
Thanks.
In GNU Emacs 27.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version 3.22.29)
of 2018-03-28 built on tm6592
Repository revision: 4b3f1a95567127ee39a7a3e4704bb1faa34b5282
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Arch Linux
Recent messages:
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C-x C-g is undefined
Configured using:
'configure PKG_CONFIG_PATH=/usr/lib/imagemagick6/pkgconfig'
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY
ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11 THREADS LIBSYSTEMD JSON LCMS2
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Group
Minor modes in effect:
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beacon-mode: t
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zen-reward-mode: t
pause-indication-mode: t
keystrokes-mode: t
global-pretty-mode: t
pcre-mode: t
csv-field-index-mode: t
nyan-mode: t
diff-auto-refine-mode: t
magit-auto-revert-mode: t
global-git-commit-mode: t
async-bytecomp-package-mode: t
on-screen-global-mode: t
wrap-region-global-mode: t
wrap-region-mode: t
keyfreq-autosave-mode: t
keyfreq-mode: t
dired-async-mode: t
global-company-mode: t
company-mode: t
ido-everywhere: t
override-global-mode: t
shell-dirtrack-mode: t
winner-mode: t
timeclock-mode-line-display: t
show-paren-mode: t
display-time-mode: t
auto-insert-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
jit-lock-debug-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
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line-number-mode: t
transient-mark-mode: t
abbrev-mode: t
Load-path shadows:
Error during checking
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custom widget hashtable-print-readable backquote dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)
Memory information:
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[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-Fix-next-page-for-certain-page-delimiters.patch --]
[-- Type: text/x-patch, Size: 859 bytes --]
From b161560c6d092a956aeba1372d94947d8b2a0ed8 Mon Sep 17 00:00:00 2001
From: Marco Wahl <marcowahlsoft@gmail.com>
Date: Wed, 4 Apr 2018 16:07:24 +0200
Subject: [PATCH] Fix next-page for certain page-delimiters
* lisp/textmodes/page-ext.el (next-page): Jump ahead page-delimiter if
at such before narrow. This fixes the command for dired.
---
lisp/textmodes/page-ext.el | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lisp/textmodes/page-ext.el b/lisp/textmodes/page-ext.el
index 8a41bc3742..d8072e3e01 100644
--- a/lisp/textmodes/page-ext.el
+++ b/lisp/textmodes/page-ext.el
@@ -317,6 +317,8 @@ next-page
(goto-char (match-beginning 0))
(goto-char (point-min)))
(setq count (1+ count)))
+ (when (looking-at page-delimiter)
+ (goto-char (match-end 0)))
(narrow-to-page)
(goto-char (point-min))
(recenter 0))
--
2.16.3
^ permalink raw reply related [flat|nested] 6+ messages in thread
* bug#31061: 27.0.50; next-page of page-ext non-functional in dired
2018-04-04 14:24 bug#31061: 27.0.50; next-page of page-ext non-functional in dired Marco Wahl
@ 2018-04-25 1:51 ` Noam Postavsky
2018-04-27 11:50 ` Marco Wahl
0 siblings, 1 reply; 6+ messages in thread
From: Noam Postavsky @ 2018-04-25 1:51 UTC (permalink / raw)
To: Marco Wahl; +Cc: 31061
[-- Attachment #1: Type: text/plain, Size: 1318 bytes --]
Marco Wahl <marcowahlsoft@gmail.com> writes:
> Precondition:
>
> - Have a dired with several subdirectories open.
Also, M-x load-lib RET page-ext RET
> Action:
>
> - C-x C-p C-n
>
> Expectation:
>
> - The dired buffer narrows to the next subdirectory.
>
> Observation:
>
> - The dired buffer narrows to the current subdirectory.
> * lisp/textmodes/page-ext.el (next-page): Jump ahead page-delimiter if
> at such before narrow. This fixes the command for dired.
I think the problem is rather that next-page is going an extra page
backwards even when COUNT was positive, so the fix should be more like
this (inline version with whitespace changes ignored, full version
attached):
--- a/lisp/textmodes/page-ext.el
+++ b/lisp/textmodes/page-ext.el
@@ -304,6 +304,7 @@ next-page
(or count (setq count 1))
(widen)
;; Cannot use forward-page because of problems at page boundaries.
+ (if (>= count 0)
(while (and (> count 0) (not (eobp)))
(if (re-search-forward page-delimiter nil t)
nil
@@ -316,7 +317,7 @@ next-page
(if (re-search-backward page-delimiter nil t)
(goto-char (match-beginning 0))
(goto-char (point-min)))
- (setq count (1+ count)))
+ (setq count (1+ count))))
(narrow-to-page)
(goto-char (point-min))
(recenter 0))
[-- Attachment #2: patch --]
[-- Type: text/plain, Size: 1931 bytes --]
From d0be1dd4592fbe16a4d9799031aed5a7c22fb144 Mon Sep 17 00:00:00 2001
From: Noam Postavsky <npostavs@gmail.com>
Date: Tue, 24 Apr 2018 21:36:17 -0400
Subject: [PATCH] Fix off-by-1 error in next-page (Bug#31061)
* lisp/textmodes/page-ext.el (next-page): Only go backwards if COUNT
was originally negative.
---
lisp/textmodes/page-ext.el | 27 ++++++++++++++-------------
1 file changed, 14 insertions(+), 13 deletions(-)
diff --git a/lisp/textmodes/page-ext.el b/lisp/textmodes/page-ext.el
index 8a41bc3742..1a1a62e963 100644
--- a/lisp/textmodes/page-ext.el
+++ b/lisp/textmodes/page-ext.el
@@ -304,19 +304,20 @@ next-page
(or count (setq count 1))
(widen)
;; Cannot use forward-page because of problems at page boundaries.
- (while (and (> count 0) (not (eobp)))
- (if (re-search-forward page-delimiter nil t)
- nil
- (goto-char (point-max)))
- (setq count (1- count)))
- ;; If COUNT is negative, we want to go back -COUNT + 1 page boundaries.
- ;; The first page boundary we reach is the top of the current page,
- ;; which doesn't count.
- (while (and (< count 1) (not (bobp)))
- (if (re-search-backward page-delimiter nil t)
- (goto-char (match-beginning 0))
- (goto-char (point-min)))
- (setq count (1+ count)))
+ (if (>= count 0)
+ (while (and (> count 0) (not (eobp)))
+ (if (re-search-forward page-delimiter nil t)
+ nil
+ (goto-char (point-max)))
+ (setq count (1- count)))
+ ;; If COUNT is negative, we want to go back -COUNT + 1 page boundaries.
+ ;; The first page boundary we reach is the top of the current page,
+ ;; which doesn't count.
+ (while (and (< count 1) (not (bobp)))
+ (if (re-search-backward page-delimiter nil t)
+ (goto-char (match-beginning 0))
+ (goto-char (point-min)))
+ (setq count (1+ count))))
(narrow-to-page)
(goto-char (point-min))
(recenter 0))
--
2.11.0
^ permalink raw reply related [flat|nested] 6+ messages in thread
* bug#31061: 27.0.50; next-page of page-ext non-functional in dired
2018-04-25 1:51 ` Noam Postavsky
@ 2018-04-27 11:50 ` Marco Wahl
2018-04-29 0:13 ` Noam Postavsky
0 siblings, 1 reply; 6+ messages in thread
From: Marco Wahl @ 2018-04-27 11:50 UTC (permalink / raw)
To: Noam Postavsky; +Cc: 31061
Noam Postavsky <npostavs@gmail.com> writes:
> Marco Wahl <marcowahlsoft@gmail.com> writes:
>
>> Precondition:
>>
>> - Have a dired with several subdirectories open.
>
> Also, M-x load-lib RET page-ext RET
Yes, thanks.
>> Action:
>>
>> - C-x C-p C-n
>>
>> Expectation:
>>
>> - The dired buffer narrows to the next subdirectory.
>>
>> Observation:
>>
>> - The dired buffer narrows to the current subdirectory.
>
>> * lisp/textmodes/page-ext.el (next-page): Jump ahead page-delimiter if
>> at such before narrow. This fixes the command for dired.
>
> I think the problem is rather that next-page is going an extra page
> backwards even when COUNT was positive, so the fix should be more like
> this (inline version with whitespace changes ignored, full version
> attached):
>
> --- a/lisp/textmodes/page-ext.el
> +++ b/lisp/textmodes/page-ext.el
> @@ -304,6 +304,7 @@ next-page
> (or count (setq count 1))
> (widen)
> ;; Cannot use forward-page because of problems at page boundaries.
> + (if (>= count 0)
> (while (and (> count 0) (not (eobp)))
> (if (re-search-forward page-delimiter nil t)
> nil
> @@ -316,7 +317,7 @@ next-page
> (if (re-search-backward page-delimiter nil t)
> (goto-char (match-beginning 0))
> (goto-char (point-min)))
> - (setq count (1+ count)))
> + (setq count (1+ count))))
> (narrow-to-page)
> (goto-char (point-min))
> (recenter 0))
I think this is a good idea to separate the cases clearly.
I found that with your suggestion next-page with negative argument goes
back one page too much in a dired buffer, though.
I further think that the core of the irritation is that `narrow-to-page'
does not narrow to the following page when on the start of the '\n\n'
page-separator (unlike for the usual '^^L' separator).
Starting with your fix I propose this modification of the else part:
(while (and (< count 1) (not (bobp)))
(if (re-search-backward page-delimiter nil t)
(when (= count 0)
(goto-char (match-end 0)))
(goto-char (point-min)))
(setq count (1+ count)))
This is: go to the end of the delimiter when the final page has been
reached.
Below a diff to make the suggested change perfectly clear, hopefully.
diff --git a/lisp/textmodes/page-ext.el b/lisp/textmodes/page-ext.el
index fbdae5892a..4990fde65a 100644
--- a/lisp/textmodes/page-ext.el
+++ b/lisp/textmodes/page-ext.el
@@ -304,19 +304,21 @@ next-page
(or count (setq count 1))
(widen)
;; Cannot use forward-page because of problems at page boundaries.
- (while (and (> count 0) (not (eobp)))
- (if (re-search-forward page-delimiter nil t)
- nil
- (goto-char (point-max)))
- (setq count (1- count)))
- ;; If COUNT is negative, we want to go back -COUNT + 1 page boundaries.
- ;; The first page boundary we reach is the top of the current page,
- ;; which doesn't count.
- (while (and (< count 1) (not (bobp)))
- (if (re-search-backward page-delimiter nil t)
- (goto-char (match-beginning 0))
- (goto-char (point-min)))
- (setq count (1+ count)))
+ (if (>= count 0)
+ (while (and (> count 0) (not (eobp)))
+ (if (re-search-forward page-delimiter nil t)
+ nil
+ (goto-char (point-max)))
+ (setq count (1- count)))
+ ;; If COUNT is negative, we want to go back -COUNT + 1 page boundaries.
+ ;; The first page boundary we reach is the top of the current page,
+ ;; which doesn't count.
+ (while (and (< count 1) (not (bobp)))
+ (if (re-search-backward page-delimiter nil t)
+ (when (= count 0)
+ (goto-char (match-end 0)))
+ (goto-char (point-min)))
+ (setq count (1+ count))))
(narrow-to-page)
(goto-char (point-min))
(recenter 0))
^ permalink raw reply related [flat|nested] 6+ messages in thread
* bug#31061: 27.0.50; next-page of page-ext non-functional in dired
2018-04-27 11:50 ` Marco Wahl
@ 2018-04-29 0:13 ` Noam Postavsky
2018-04-29 20:23 ` Marco Wahl
0 siblings, 1 reply; 6+ messages in thread
From: Noam Postavsky @ 2018-04-29 0:13 UTC (permalink / raw)
To: Marco Wahl; +Cc: 31061
Marco Wahl <marcowahlsoft@gmail.com> writes:
> I found that with your suggestion next-page with negative argument goes
> back one page too much in a dired buffer, though.
>
> I further think that the core of the irritation is that `narrow-to-page'
> does not narrow to the following page when on the start of the '\n\n'
> page-separator (unlike for the usual '^^L' separator).
As far as I can tell, narrow-to-page still has the same problem with the
default "\n\f" separator as the "\n\n" one. It's just that the problem
is more visually obvious in the dired case. Using thingatpt seems to
work better (but this doesn't handle the COUNT argument for
narrow-to-page):
(let ((bounds (bounds-of-thing-at-point 'page)))
(narrow-to-region (car bounds) (cdr bounds)))
Though I guess it might be arguable whether the page separator should
count as part of the page or not. The above expression (and
`mark-page') treat the separator as part of the preceding page,
`narrow-to-page' seems to exclude the separator from the page.
> Starting with your fix I propose this modification of the else part:
>
> (while (and (< count 1) (not (bobp)))
> (if (re-search-backward page-delimiter nil t)
> (when (= count 0)
> (goto-char (match-end 0)))
> (goto-char (point-min)))
> (setq count (1+ count)))
>
> This is: go to the end of the delimiter when the final page has been
> reached.
Yeah, that works.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#31061: 27.0.50; next-page of page-ext non-functional in dired
2018-04-29 0:13 ` Noam Postavsky
@ 2018-04-29 20:23 ` Marco Wahl
2018-05-03 0:36 ` Noam Postavsky
0 siblings, 1 reply; 6+ messages in thread
From: Marco Wahl @ 2018-04-29 20:23 UTC (permalink / raw)
To: Noam Postavsky; +Cc: 31061
Noam Postavsky <npostavs@gmail.com> writes:
> Marco Wahl <marcowahlsoft@gmail.com> writes:
>
>> I found that with your suggestion next-page with negative argument goes
>> back one page too much in a dired buffer, though.
>>
>> I further think that the core of the irritation is that `narrow-to-page'
>> does not narrow to the following page when on the start of the '\n\n'
>> page-separator (unlike for the usual '^^L' separator).
>
> As far as I can tell, narrow-to-page still has the same problem with the
> default "\n\f" separator as the "\n\n" one. It's just that the problem
> is more visually obvious in the dired case. Using thingatpt seems to
> work better (but this doesn't handle the COUNT argument for
> narrow-to-page):
>
> (let ((bounds (bounds-of-thing-at-point 'page)))
> (narrow-to-region (car bounds) (cdr bounds)))
>
> Though I guess it might be arguable whether the page separator should
> count as part of the page or not. The above expression (and
> `mark-page') treat the separator as part of the preceding page,
> `narrow-to-page' seems to exclude the separator from the page.
I fully agree that one might like the separator to be part of the page.
This might help e.g. for killing and yanking.
Actually I tend towards excluding any separator when narrowing to a
page. I see a document as sequence like
<content><separator><content><separator>...<separator><content>
and the content is all I'd expect when narrowing to a page.
>> Starting with your fix I propose this modification of the else part:
>>
>> (while (and (< count 1) (not (bobp)))
>> (if (re-search-backward page-delimiter nil t)
>> (when (= count 0)
>> (goto-char (match-end 0)))
>> (goto-char (point-min)))
>> (setq count (1+ count)))
>>
>> This is: go to the end of the delimiter when the final page has been
>> reached.
>
> Yeah, that works.
Cool.
Best regards!
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#31061: 27.0.50; next-page of page-ext non-functional in dired
2018-04-29 20:23 ` Marco Wahl
@ 2018-05-03 0:36 ` Noam Postavsky
0 siblings, 0 replies; 6+ messages in thread
From: Noam Postavsky @ 2018-05-03 0:36 UTC (permalink / raw)
To: Marco Wahl; +Cc: 31061
tags 31061 fixed
close 31061 27.1
quit
Marco Wahl <marcowahlsoft@gmail.com> writes:
>>
>> Yeah, that works.
>
> Cool.
>
> Best regards!
Okay, pushed to master.
[1: 8a6521260d]: 2018-05-02 20:35:20 -0400
Fix next-page for dired (Bug#31061)
https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=8a6521260dc650b4b713ea8bc71348cbe730f6e4
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-05-03 0:36 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-04 14:24 bug#31061: 27.0.50; next-page of page-ext non-functional in dired Marco Wahl
2018-04-25 1:51 ` Noam Postavsky
2018-04-27 11:50 ` Marco Wahl
2018-04-29 0:13 ` Noam Postavsky
2018-04-29 20:23 ` Marco Wahl
2018-05-03 0:36 ` Noam Postavsky
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