From: Eli Zaretskii <eliz@gnu.org>
To: Corwin Brust <corwin@bru.st>
Cc: 54084@debbugs.gnu.org
Subject: bug#54084: 28.0.91; Regression: can't create empty image buffer
Date: Mon, 21 Feb 2022 16:00:12 +0200 [thread overview]
Message-ID: <83mtikuxoz.fsf@gnu.org> (raw)
In-Reply-To: <CAJf-WoSU0e4dEmVTH=wxX5=UywqP0Vy7emhXqv4vXaKtVmPMFg@mail.gmail.com> (message from Corwin Brust on Mon, 21 Feb 2022 07:41:36 -0600)
[Please use Reply All, so that the bug tracker remains on the CC.]
> From: Corwin Brust <corwin@bru.st>
> Date: Mon, 21 Feb 2022 07:41:36 -0600
>
> On Mon, Feb 21, 2022 at 6:57 AM Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > It's a feature, see bug#16062. (It misfired when the empty buffer
> > wasn't visiting a file, but I've now fixed that on the release
> > branch.)
>
> Is there a way to disable this feature?
Why is that needed? Turning on image-mode in an empty buffer is a
pretty strange thing to do, or at least a rare thing.
> In my case the image type won't change, I'd be fine hard-coding
> that.
>
> >
> > You are supposed to insert the data, and then turn on image-mode. We
> > don't support image-mode in empty buffers, because that makes it
> > impossible to detect the image type, and thus leads to complications
> > down the road.
> >
> > Thanks.
>
> I'm not sure how to avoid this error when I create a new buffer in a
> mode derived from image mode.
Can't you use ignore-errors?
> Is there an alternative you can recommend to creating my own
> "one-off" version of image mode and deriving from that? In my case,
> I have created an SVG sketching mode and have been reusing,
> e.g. "canvas" resizing logic from image-mode for a couple of years
> without issue.
>
> TIA for any hints.
How about delaying the mode switch until the user inserted something?
next prev parent reply other threads:[~2022-02-21 14:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 8:21 bug#54084: 28.0.91; Regression: can't create empty image buffer Corwin Brust
2022-02-21 12:57 ` Eli Zaretskii
2022-02-21 13:58 ` Corwin Brust
2022-02-21 14:03 ` Eli Zaretskii
[not found] ` <CAJf-WoSU0e4dEmVTH=wxX5=UywqP0Vy7emhXqv4vXaKtVmPMFg@mail.gmail.com>
2022-02-21 14:00 ` Eli Zaretskii [this message]
2022-02-21 14:16 ` Corwin Brust
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