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bug#32978: 26.1; newline-and-indent duplicates displayed image

From: Eli Zaretskii
Subject: bug#32978: 26.1; newline-and-indent duplicates displayed image
Date: Mon, 15 Oct 2018 05:33:56 +0300

tags 32978 notabug

> From: Markus Triska <address@hidden>
> Cc: address@hidden
> Date: Sun, 14 Oct 2018 22:40:50 +0200
> > Not sure why you expected that.  Perhaps you thought that forward-char
> > will move to after the image?
> Yes indeed! Since a single forward-char moves over the image when used
> interactively, I got the impression that the image is only a single
> character. From your code example, I see that this is not the case!

No, it's not.  You can see in image-file.el that what
insert-image-file does is insert the entire image file into the
buffer, and then put a 'display' property over all those bytes.  So
the image spans many characters in this case.

> I think a very good solution would be to document the return value of
> insert-image-file, i.e., to add to its description a statement such as:
>     Returns list of absolute file name and number of characters
>     inserted.
> What do you think?

I was thinking the same; will do.

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