From: martin rudalics <rudalics@gmx.at>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Eli Zaretskii <eliz@gnu.org>, npostavs@gmail.com, emacs-devel@gnu.org
Subject: Re: "after" variable watchers
Date: Tue, 18 May 2021 19:01:34 +0200 [thread overview]
Message-ID: <b8fe3388-87bf-e487-300e-316c1418e1f7@gmx.at> (raw)
In-Reply-To: <jwvtun0nix6.fsf-monnier+emacs@gnu.org>
> What was the problem you encountered when you tried to add:
>
> if (<dirty>) window_updeco_window (...);
>
> to the getters of the realized values?
There are too many implicit "realized" values to make this work nicely.
Think of macros like WINDOW_BODY_PIXEL_WIDTH, WINDOW_BOX_LEFT_EDGE_X,
WINDOW_BOX_RIGHT_EDGE_X, WINDOW_SCROLL_BAR_X or functions like
window_box_height in addition to the things window_updeco_window sets
directly.
> You obviously know more about this code, so I can't say much more.
> I was just pointing in the direction of using dirty "bits" (it's
> actually often better to represent dirty state via things like our
> buffer ticks than via actual `dirty` bits) because it's the standard
> solution for such problems: experience has usually shown that decoupling
> the setting of vars from the execution of the consequences usually leads
> to a much more solid design where it's much easier to deal with problems
> of inf-loops or (in)efficiency.
Right. But note that I implicitly call window_updeco_window also
whenever I change a window's size, for example, from adjust_frame_size
after a frame got resized. A `window-body-size' or `window-min-size'
call after that would then require to run window_updeco_window too.
Identifying all sorts of such getters is not a very reliable process.
(BTW, identifying all sorts of setters is not that easy either -
face-remap.el alone contains six calls for this.)
I do use a quite extended mechanism for identifying a "dirty" state when
trying to catch changes in windows (see run_window_change_functions) so
I think that I'm not allergic to such a solution. But in the case at
hand I simply failed to integrate it well in the existing framework.
martin
next prev parent reply other threads:[~2021-05-18 17:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 8:27 "after" variable watchers martin rudalics
2021-05-17 10:23 ` Eli Zaretskii
2021-05-17 16:40 ` martin rudalics
2021-05-17 16:57 ` Eli Zaretskii
2021-05-18 15:10 ` martin rudalics
2021-05-20 13:46 ` Eli Zaretskii
2021-05-24 8:47 ` martin rudalics
2021-05-27 16:51 ` Eli Zaretskii
2021-06-06 7:42 ` martin rudalics
2021-05-17 18:36 ` Stefan Monnier
2021-05-17 18:45 ` Eli Zaretskii
2021-05-17 18:54 ` Stefan Monnier
2021-05-17 18:55 ` Stefan Monnier
2021-05-18 15:10 ` martin rudalics
2021-05-18 15:57 ` Stefan Monnier
2021-05-18 17:01 ` martin rudalics [this message]
2021-05-20 13:49 ` Eli Zaretskii
2021-05-24 8:48 ` martin rudalics
2021-05-27 16:53 ` Eli Zaretskii
2021-05-17 14:57 ` Matt Armstrong
2021-05-17 16:41 ` martin rudalics
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