--- Begin Message ---
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Subject: |
29.0.60; Bindings on `image-map` cause error on sliced images |
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Date: |
Wed, 05 Apr 2023 17:23:11 +0200 |
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User-agent: |
mu4e 1.10.1; emacs 29.0.60 |
Dear Emacs maintainers,
Starting from `emacs -Q`, post the following code into scratch buffer,
```
(let* ((image (create-image path-to-png 'png nil :mask 'heuristic))
(rows (max 1 (1- (cdr (image-size image))))))
(goto-char (point-max))
(insert "\n")
(insert-sliced-image image " " nil rows))
```
This inserts the image specified at the end of the buffer. The image
has a `keymap` text property which include binding for various
operations on images but moving point to the image and trying to use
any of these (e.g. `i +` to increase image size) results in the error,
Error running timer ‘image--change-size’: (error "No image under point")
Rah Guzar
In GNU Emacs 29.0.60 (build 1, x86_64-suse-linux-gnu, GTK+ Version
3.24.37, cairo version 1.17.8) of 2023-04-03 built on cloud108
System Description: openSUSE Tumbleweed
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--- End Message ---
--- Begin Message ---
|
Subject: |
Re: bug#62679: 29.0.60; Bindings on `image-map` cause error on sliced images |
|
Date: |
Sat, 08 Apr 2023 12:46:55 +0300 |
> From: Rah Guzar <rahguzar@zohomail.eu>
> Cc: larsi@gnus.org, 62679@debbugs.gnu.org
> Date: Thu, 06 Apr 2023 20:30:19 +0200
>
> > I cannot reproduce this. On my system, if I move point with the right
> > arrow key, "M-x describe-text-properties" doesn't show the keymap
> > property.
>
> You are right there is no keymap property there but somehow "image-map"
> is still active. I can press "i +" there and see the error while after or
> before the image pressing "i +" will insert the two characters.
Thanks, I fixed this now on the emacs-29 branch.
> >> According to the info manual, the advantage of using sliced images is
> >> to get a more intuitive scrolling behavior and that is the reason I am
> >> using them. I think for everything else the image should behave as a
> >> single image. For that reason the behavior of "i r" seems correct to
> >> me. It rotates the image and then slices.
> >
> > If this is what you see, I guess you have Emacs built with
> > ImageMagick? I don't see "rotation followed by slicing", because the
> > code doesn't do that, at least not with rotation that is implemented
> > natively in Emacs on my system. But, as I said, rotation of sliced
> > image is not well defined, so my opinion is that people should not
> > depend on it doing something sensible.
>
> Evaluating "(image-type-available-p 'imagemagick)" returns nil so I
> think Emacs is built without imagemagick support. The sequence of
> command I ran to build it were
> ./configure --with-pgtk
> make
> make bootstrap
> where the first make failed due to some org issue.
>
> But to the broader point about rotation not being sensible I think it
> might be a good idea to put a different keymap on sliced images in that
> case. Maybe "sliced-image-map" which should be the parent of
> "image-map". I don't see any misbehavior though.
I added a new map, in which some commands that have no meaning for
sliced images are absent.
And with that, I'm closing this bug.
--- End Message ---