* zero-width line continuation glyph
@ 2018-09-11 11:58 Robert Pluim
2018-09-11 12:24 ` Eli Zaretskii
2018-09-11 12:37 ` Eli Zaretskii
0 siblings, 2 replies; 7+ messages in thread
From: Robert Pluim @ 2018-09-11 11:58 UTC (permalink / raw)
To: emacs-devel
Hi,
Iʼm trying to get the line continuation character to not be shown for
lines that are exactly as long as the window width. In a GUI frame,
with the fringe turned off, I can do:
(let ((disptab (or buffer-display-table
(setq buffer-display-table (make-display-table)))))
(set-display-table-slot disptab 'wrap (gethash "ZERO WIDTH SPACE" (ucs-names))))
which causes the '\' to not be shown, but the next character does not
get displayed in its place, ie
0123456789
xxxxxxxxxx\
x
gets transformed to
0123456789
xxxxxxxxxx
x
In emacs -nw, the behaviour is different:
0123456789
xxxxxxxxxx\
x
gets transformed to
0123456789
xxxxxxxxxxx
which is what I want, but then any characters I add to the end of that line are not
displayed at all.
Thanks
Robert
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: zero-width line continuation glyph
2018-09-11 11:58 zero-width line continuation glyph Robert Pluim
@ 2018-09-11 12:24 ` Eli Zaretskii
2018-09-11 12:52 ` Robert Pluim
2018-09-11 12:37 ` Eli Zaretskii
1 sibling, 1 reply; 7+ messages in thread
From: Eli Zaretskii @ 2018-09-11 12:24 UTC (permalink / raw)
To: Robert Pluim; +Cc: emacs-devel
> From: Robert Pluim <rpluim@gmail.com>
> Date: Tue, 11 Sep 2018 13:58:55 +0200
>
> Iʼm trying to get the line continuation character to not be shown for
> lines that are exactly as long as the window width. In a GUI frame,
> with the fringe turned off, I can do:
>
> (let ((disptab (or buffer-display-table
> (setq buffer-display-table (make-display-table)))))
> (set-display-table-slot disptab 'wrap (gethash "ZERO WIDTH SPACE" (ucs-names))))
>
> which causes the '\' to not be shown, but the next character does not
> get displayed in its place, ie
ZERO WIDTH SPACE by default is displayed as a 1-pixel thin space, so I
think you will have to tweak glyphless-char-display-control to display
that character as nothing, to get what you want. Otherwise, the 1
pixel less space left on the line is not enough for Emacs to display
another character.
> In emacs -nw, the behaviour is different:
>
> 0123456789
> xxxxxxxxxx\
> x
>
> gets transformed to
>
> 0123456789
> xxxxxxxxxxx
>
> which is what I want, but then any characters I add to the end of that line are not
> displayed at all.
Since TTYs cannot display thin characters, the above sounds like a bug
to me. But again, without tweaking glyphless-char-display-control,
what you want cannot happen (if at all).
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: zero-width line continuation glyph
2018-09-11 12:24 ` Eli Zaretskii
@ 2018-09-11 12:52 ` Robert Pluim
0 siblings, 0 replies; 7+ messages in thread
From: Robert Pluim @ 2018-09-11 12:52 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: emacs-devel
Eli Zaretskii <eliz@gnu.org> writes:
>> In emacs -nw, the behaviour is different:
>>
>> 0123456789
>> xxxxxxxxxx\
>> x
>>
>> gets transformed to
>>
>> 0123456789
>> xxxxxxxxxxx
>>
>> which is what I want, but then any characters I add to the end of that line are not
>> displayed at all.
>
> Since TTYs cannot display thin characters, the above sounds like a bug
> to me. But again, without tweaking glyphless-char-display-control,
> what you want cannot happen (if at all).
Even with glyphless-char-display-control tweaked for 'format-control',
I get the same behaviour.
Robert
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: zero-width line continuation glyph
2018-09-11 11:58 zero-width line continuation glyph Robert Pluim
2018-09-11 12:24 ` Eli Zaretskii
@ 2018-09-11 12:37 ` Eli Zaretskii
2018-09-11 12:51 ` Robert Pluim
1 sibling, 1 reply; 7+ messages in thread
From: Eli Zaretskii @ 2018-09-11 12:37 UTC (permalink / raw)
To: Robert Pluim; +Cc: emacs-devel
> From: Robert Pluim <rpluim@gmail.com>
> Date: Tue, 11 Sep 2018 13:58:55 +0200
>
> Iʼm trying to get the line continuation character to not be shown for
> lines that are exactly as long as the window width. In a GUI frame,
> with the fringe turned off, I can do:
>
> (let ((disptab (or buffer-display-table
> (setq buffer-display-table (make-display-table)))))
> (set-display-table-slot disptab 'wrap (gethash "ZERO WIDTH SPACE" (ucs-names))))
>
> which causes the '\' to not be shown, but the next character does not
> get displayed in its place, ie
Actually, I'm not sure this will work at all, because Emacs needs a
place to put the cursor at EOL. So it cannot put a character there,
because without a fringe, there's no place to display the cursor.
I think you will have a much better approximation of what you want if
you keep the fringe, but make it 1-pixel wide.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: zero-width line continuation glyph
2018-09-11 12:37 ` Eli Zaretskii
@ 2018-09-11 12:51 ` Robert Pluim
2018-09-11 13:08 ` Eli Zaretskii
0 siblings, 1 reply; 7+ messages in thread
From: Robert Pluim @ 2018-09-11 12:51 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: emacs-devel
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Robert Pluim <rpluim@gmail.com>
>> Date: Tue, 11 Sep 2018 13:58:55 +0200
>>
>> Iʼm trying to get the line continuation character to not be shown for
>> lines that are exactly as long as the window width. In a GUI frame,
>> with the fringe turned off, I can do:
>>
>> (let ((disptab (or buffer-display-table
>> (setq buffer-display-table (make-display-table)))))
>> (set-display-table-slot disptab 'wrap (gethash "ZERO WIDTH SPACE" (ucs-names))))
>>
>> which causes the '\' to not be shown, but the next character does not
>> get displayed in its place, ie
>
> Actually, I'm not sure this will work at all, because Emacs needs a
> place to put the cursor at EOL. So it cannot put a character there,
> because without a fringe, there's no place to display the cursor.
Youʼre right: customizing glyphless-char-display-control to
zero-width for 'format-control' makes no difference.
> I think you will have a much better approximation of what you want if
> you keep the fringe, but make it 1-pixel wide.
Unfortunately emacs -nw has no fringes.
Robert
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: zero-width line continuation glyph
2018-09-11 12:51 ` Robert Pluim
@ 2018-09-11 13:08 ` Eli Zaretskii
2018-09-11 13:12 ` Robert Pluim
0 siblings, 1 reply; 7+ messages in thread
From: Eli Zaretskii @ 2018-09-11 13:08 UTC (permalink / raw)
To: Robert Pluim; +Cc: emacs-devel
> From: Robert Pluim <rpluim@gmail.com>
> Cc: emacs-devel@gnu.org
> Date: Tue, 11 Sep 2018 14:51:32 +0200
>
> > I think you will have a much better approximation of what you want if
> > you keep the fringe, but make it 1-pixel wide.
>
> Unfortunately emacs -nw has no fringes.
Is -nw so important that it must be part of the solution? It should
be easier to make the window slightly wider, no?
More radical solutions will need changes on the C level, I think.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: zero-width line continuation glyph
2018-09-11 13:08 ` Eli Zaretskii
@ 2018-09-11 13:12 ` Robert Pluim
0 siblings, 0 replies; 7+ messages in thread
From: Robert Pluim @ 2018-09-11 13:12 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: emacs-devel
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Robert Pluim <rpluim@gmail.com>
>> Cc: emacs-devel@gnu.org
>> Date: Tue, 11 Sep 2018 14:51:32 +0200
>>
>> > I think you will have a much better approximation of what you want if
>> > you keep the fringe, but make it 1-pixel wide.
>>
>> Unfortunately emacs -nw has no fringes.
>
> Is -nw so important that it must be part of the solution? It should
> be easier to make the window slightly wider, no?
>
It would be nice if the same mechanism worked for both, but itʼs not
mandatory.
> More radical solutions will need changes on the C level, I think.
Itʼs not a big problem, I was just intrigued by the
possibilities. Getting d-s-m sorted out is more important :-)
Thanks
Robert
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2018-09-11 13:12 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-09-11 11:58 zero-width line continuation glyph Robert Pluim
2018-09-11 12:24 ` Eli Zaretskii
2018-09-11 12:52 ` Robert Pluim
2018-09-11 12:37 ` Eli Zaretskii
2018-09-11 12:51 ` Robert Pluim
2018-09-11 13:08 ` Eli Zaretskii
2018-09-11 13:12 ` Robert Pluim
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