GNU bug report logs - #71345
Feature: unleash font-lock's secret weapon; handle Qfontified = non-nil

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 71345 <at> debbugs.gnu.org, jdtsmith <at> gmail.com, dmitry <at> gutov.dev
Subject: bug#71345: Feature: unleash font-lock's secret weapon; handle Qfontified = non-nil
Date: Wed, 05 Jun 2024 12:28:01 -0400

>> Because a given buffer can have several (window-)points,
>> position-dependent highlighting will ideally want to be added via
>> (window-specific) overlays rather than text-properties.
>
> Not sure I understand how this remark is relevant to the issue
> discussed here, but let me just point out that when redisplay starts
> working on a window, it temporarily moves point to the window-point
> position.  So position-dependent highlighting will behave in each
> window according to its window-point, which I think is what's expected
> here?

But the highlighting is done "once and for all" (at least until the next
command), so if you want it to be different in different windows (to
reflect the different values of `point` in those windows) you'll need
overlays with the `window` property because the highlighting will not be
re-done in the middle of redisplay when we go from one window to another.


        Stefan

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