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Re: Fix info display of images

From: David Kastrup
Subject: Re: Fix info display of images
Date: Sun, 13 Dec 2009 12:09:35 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

David Kastrup <address@hidden> writes:

> Juri Linkov <address@hidden> writes:
>>> the info images in the Lilypond documentation have a rather messed-up
>>> display.  That's more or less due to Emacs putting "invisible"
>>> properties over image code indiscriminately.
>>> I find that the following does help.
>> If you provided a test case, I would be able to confirm whether it
>> works or not.
> I can't easily provide a useful test case since that requires the
> corresponding image files as well, and those are in one rather large
> directory.
> *I* can confirm that the patch works as intended.
>> But now it seems strange to me that you fix this in
>> `Info-hide-cookies-node' instead of `Info-display-images-node'.
> The problem is that `Info-hide-cookies-node' rehides the images.  The
> combination of invisible and display properties wreaks havoc on the
> resulting display and cursor movement.  This gets even worse because the
> images are also displayed using the "rear-nonsticky (display)" property,
> which implies that all other properties (including invisible) become
> rear-sticky.
> So Info-hide-cookies-node should simply refrain from tampering with
> cookies that have already been handled.
> The extended test in my patch does that.

Since there does not appear to be interest to apply this patch, let me
illustrate the difference using two screen shots, the first without the
patch, the second with the patch.

I think that the improvement is rather obvious.

PNG image

PNG image

David Kastrup

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