bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[David Klein]

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runemacs.exe -Q
(setq auto-mode-alist
      (cons '("\\.latex$" . latex-mode) auto-mode-alist))^X^E
(add-hook 'latex-mode-hook 'refill-mode)^X^E
^X^F junk.latex
Type in a few random lines interspersed with empty lines
Go back to the end of a line that is followed by an empty line and type
a space (or several). No space gets inserted. Non whitespace inserts
correctly.



In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 of 2019-08-29 built on CIRROCUMULUS
Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
Windowing system distributor 'Microsoft Corp.', version 10.0.19041
Recent messages:
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Checking 176 files in
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Checking 24 files in c:/emacs-26.3-x86_64/share/emacs/26.3/lisp/cedet...
Checking 57 files in c:/emacs-26.3-x86_64/share/emacs/26.3/lisp/calendar...
Checking 87 files in c:/emacs-26.3-x86_64/share/emacs/26.3/lisp/calc...
Checking 105 files in c:/emacs-26.3-x86_64/share/emacs/26.3/lisp/obsolete...
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bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[Eli Zaretskii]

> From: David Klein <dklein0@gmail.com>
> Date: Tue, 8 Dec 2020 10:16:40 +0200
> 
> runemacs.exe -Q
> (setq auto-mode-alist
>       (cons '("\\.latex$" . latex-mode) auto-mode-alist))^X^E
> (add-hook 'latex-mode-hook 'refill-mode)^X^E
> ^X^F junk.latex
> Type in a few random lines interspersed with empty lines
> Go back to the end of a line that is followed by an empty line and type
> a space (or several). No space gets inserted. Non whitespace inserts correctly.

Isn't that expected,, given that the doc string of this mode says:

                                             When enabled, the
  current paragraph is refilled as you edit.  Self-inserting
  characters only cause refilling if they would cause
  auto-filling.

"Refilled as you edit means excess whitespace is removed, no?

bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[David Klein]

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Apologies. I didn't make myself sufficiently clear.

If I typed in the text

"The quick brown

jumped

over
"

and then went up to the end of the first line and type the characters
'[space]' 'H' 'e' 'l' 'l' 'o'

I get

"The quick brownHello"

instead of

"The quick brown Hello"

i.e. zero spaces instead of one. Only excess whitespace should be removed
and the first space isn't excess.



On Tue, Dec 8, 2020 at 5:21 PM Eli Zaretskii <eliz@gnu.org> wrote:

> > From: David Klein <dklein0@gmail.com>
> > Date: Tue, 8 Dec 2020 10:16:40 +0200
> >
> > runemacs.exe -Q
> > (setq auto-mode-alist
> >       (cons '("\\.latex$" . latex-mode) auto-mode-alist))^X^E
> > (add-hook 'latex-mode-hook 'refill-mode)^X^E
> > ^X^F junk.latex
> > Type in a few random lines interspersed with empty lines
> > Go back to the end of a line that is followed by an empty line and type
> > a space (or several). No space gets inserted. Non whitespace inserts
> correctly.
>
> Isn't that expected,, given that the doc string of this mode says:
>
>                                              When enabled, the
>   current paragraph is refilled as you edit.  Self-inserting
>   characters only cause refilling if they would cause
>   auto-filling.
>
> "Refilled as you edit means excess whitespace is removed, no?
>

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bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[Eli Zaretskii]

> From: David Klein <dklein0@gmail.com>
> Date: Tue, 8 Dec 2020 19:13:33 +0200
> Cc: 45116@debbugs.gnu.org
> 
> If I typed in the text
> 
> "The quick brown
> 
> jumped
> 
> over
> "
> 
> and then went up to the end of the first line and type the characters
> '[space]' 'H' 'e' 'l' 'l' 'o'
> 
> I get
> 
> "The quick brownHello"
> 
> instead of
> 
> "The quick brown Hello"
> 
> i.e. zero spaces instead of one. Only excess whitespace should be removed
> and the first space isn't excess.

What logic would you suggest to implement to decide that this space is
it not excess?

bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[David Klein]

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For example, set a flag when user inserts a space character after a
non-space character. If he subsequently inserts a non space character,
insert a single space into the buffer.

Did you try it out in an emacs buffer? Really, give it a shot. The current
behavior is so counterintuitive as to make it useless.

On Tue, 8 Dec 2020, 19:25 Eli Zaretskii, <eliz@gnu.org> wrote:

> > From: David Klein <dklein0@gmail.com>
> > Date: Tue, 8 Dec 2020 19:13:33 +0200
> > Cc: 45116@debbugs.gnu.org
> >
> > If I typed in the text
> >
> > "The quick brown
> >
> > jumped
> >
> > over
> > "
> >
> > and then went up to the end of the first line and type the characters
> > '[space]' 'H' 'e' 'l' 'l' 'o'
> >
> > I get
> >
> > "The quick brownHello"
> >
> > instead of
> >
> > "The quick brown Hello"
> >
> > i.e. zero spaces instead of one. Only excess whitespace should be removed
> > and the first space isn't excess.
>
> What logic would you suggest to implement to decide that this space is
> it not excess?
>

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bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[David Klein]

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Actually, an even better behaviour would be that when user inserts a
whitespace character at the end of the line and the whitespace is preceded
by non-whitespace, refill *does* insert the whitespace immediately into the
buffer.

On Tue, Dec 8, 2020 at 7:36 PM David Klein <dklein0@gmail.com> wrote:

> For example, set a flag when user inserts a space character after a
> non-space character. If he subsequently inserts a non space character,
> insert a single space into the buffer.
>
> Did you try it out in an emacs buffer? Really, give it a shot. The current
> behavior is so counterintuitive as to make it useless.
>
> On Tue, 8 Dec 2020, 19:25 Eli Zaretskii, <eliz@gnu.org> wrote:
>
>> > From: David Klein <dklein0@gmail.com>
>> > Date: Tue, 8 Dec 2020 19:13:33 +0200
>> > Cc: 45116@debbugs.gnu.org
>> >
>> > If I typed in the text
>> >
>> > "The quick brown
>> >
>> > jumped
>> >
>> > over
>> > "
>> >
>> > and then went up to the end of the first line and type the characters
>> > '[space]' 'H' 'e' 'l' 'l' 'o'
>> >
>> > I get
>> >
>> > "The quick brownHello"
>> >
>> > instead of
>> >
>> > "The quick brown Hello"
>> >
>> > i.e. zero spaces instead of one. Only excess whitespace should be
>> removed
>> > and the first space isn't excess.
>>
>> What logic would you suggest to implement to decide that this space is
>> it not excess?
>>
>

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bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[Lars Ingebrigtsen]

David Klein <dklein0@gmail.com> writes:

> If I typed in the text 
>
> "The quick brown
>
> jumped 
>
> over
> "
>
> and then went up to the end of the first line and type the characters '
> [space]' 'H' 'e' 'l' 'l' 'o'
>
> I get
>
> "The quick brownHello"
>
> instead of 
>
> "The quick brown Hello"
>
> i.e. zero spaces instead of one. Only excess whitespace should be removed
> and the first space isn't excess.

I tried reproducing this in various Emacs versions, but I was unable
to -- the space isn't removed (with refill-mode on) when I test this.

Do you have a complete recipe, starting from "emacs -Q"?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[David Klein]

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I no longer have the setup I had when I posted the question. In my current
setups I can't reproduce either.


On Wed, Sep 8, 2021 at 12:39 PM Lars Ingebrigtsen <larsi@gnus.org> wrote:

> David Klein <dklein0@gmail.com> writes:
>
> > If I typed in the text
> >
> > "The quick brown
> >
> > jumped
> >
> > over
> > "
> >
> > and then went up to the end of the first line and type the characters '
> > [space]' 'H' 'e' 'l' 'l' 'o'
> >
> > I get
> >
> > "The quick brownHello"
> >
> > instead of
> >
> > "The quick brown Hello"
> >
> > i.e. zero spaces instead of one. Only excess whitespace should be removed
> > and the first space isn't excess.
>
> I tried reproducing this in various Emacs versions, but I was unable
> to -- the space isn't removed (with refill-mode on) when I test this.
>
> Do you have a complete recipe, starting from "emacs -Q"?
>
> --
> (domestic pets only, the antidote for overdose, milk.)
>    bloggy blog: http://lars.ingebrigtsen.no
>

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bug#45116: 26.3; refill-mode doesn't allow me to add text at the end of a paragraph

[Lars Ingebrigtsen]

David Klein <dklein0@gmail.com> writes:

> I no longer have the setup I had when I posted the question. In my current
> setups I can't reproduce either.

OK; I'm closing this bug report, then.  If you re-experience the bug,
please respond to the debbugs address, and we'll reopen.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no