GNU bug report logs - #39115
26.3; eww consecutive links look like one link with mouse-over

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From: Stephen Berman <stephen.berman <at> gmx.net>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 39115 <at> debbugs.gnu.org, ynyaaa <at> gmail.com
Subject: bug#39115: 26.3; eww consecutive links look like one link with mouse-over
Date: Thu, 23 Jan 2020 15:47:28 +0100

On Thu, 23 Jan 2020 13:22:21 +0100 Lars Ingebrigtsen <larsi <at> gnus.org> wrote:

> Stephen Berman <stephen.berman <at> gmx.net> writes:
>
>> Why do overlays and text properties differ on this?
>
> Overlays are objects, so even if they have identical properties, it's
> easy to see where an overlay starts and stops.  For text properties, we
> just use ad-hoc strategies like seeing whether the property we're
> interested changes or not, and determine the start/stop of the region
> based on that.
>
> It's perhaps unfortunate that text property regions don't have more
> "identity", but I guess it'd be difficult to change that now.

On Thu, 23 Jan 2020 16:39:46 +0200 Eli Zaretskii <eliz <at> gnu.org> wrote:

>> From: Stephen Berman <stephen.berman <at> gmx.net>
>> Cc: larsi <at> gnus.org,  ynyaaa <at> gmail.com,  39115 <at> debbugs.gnu.org
>> Date: Wed, 22 Jan 2020 21:44:11 +0100
>>
>> Why do overlays and text properties differ on this?
>
> That's a side effect of different implementations.  Text properties
> are kept as intervals, and so two adjacent intervals with the same
> value of the property are indistinguishable from a single interval
> covering both stretches of text (and AFAIR we actually convert them
> into a single interval when we see fit).  By contrast, overlays are
> kept in a list, and you can have any number of them at the same
> position with the same property (which is why you can have, e.g., two
> or more after-strings at EOB, and they will both be displayed).

Thanks for the explanations.

Steve Berman

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