Stefan Kangas <stefankangas@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 66769) by debbugs.gnu.org; 2 Nov 2023 06:28:56 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Nov 02 02:28:56 2023 Received: from localhost ([127.0.0.1]:53747 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qyRCJ-00046p-QC for submit <at> debbugs.gnu.org; Thu, 02 Nov 2023 02:28:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44048) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1qyRCI-00046d-2k for 66769 <at> debbugs.gnu.org; Thu, 02 Nov 2023 02:28:54 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1qyRBd-0000BE-UJ; Thu, 02 Nov 2023 02:28:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=TTS0nahcZoNcxxSaLv5Y/v08/GtkORKsWp+LXITCIag=; b=ja4dVyb67RS5 MVurACz1JOUyc9qGXb9Q+Hf5WZTyUsLevvHmEjgi6lYNnciJGrz7Fn26nI0RYPXAuj00Uw1FuTBjB baJ/vBvnNMZUzt82m2csiFJ3WHNK5sweqAi5QU14WhALPkpQYw7ahDD1H4HQsD5MQpFrqOBFTOcS9 YfuK8srS1vn7Z7/Q2aWNWvaiuuSTNXe98EW4F17B+Cutdn9Xl1Ko1/hIgKLTLwOARnlWlrRDoZXU5 94qRdlclan9Am/O8C5v8M2bnzlDK86zqdh9qrnG1sj+ivl+e15OkLFTieivlY3KxU+hwEx9WjPS72 rW7Cu/DSy0Z/gPdpHqQIMA==; Date: Thu, 02 Nov 2023 08:28:05 +0200 Message-Id: <83fs1o8ya2.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Aaron Jensen <aaronjensen@HIDDEN> In-Reply-To: <CAHyO48xkxt3bHE2Sofn3XqABqHyzp=fn0UN53UytEuXwPCCECg@HIDDEN> (message from Aaron Jensen on Wed, 1 Nov 2023 22:49:40 -0700) Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <CAHyO48xkxt3bHE2Sofn3XqABqHyzp=fn0UN53UytEuXwPCCECg@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 66769 Cc: luangruo@HIDDEN, 66769 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Cc: 66769 <at> debbugs.gnu.org > From: Aaron Jensen <aaronjensen@HIDDEN> > Date: Wed, 1 Nov 2023 22:49:40 -0700 > > Is there a fast way to compute the position that is scroll-margin lines away from the window start Try something like (save-excursion (goto-char (window-start)) (vertical-motion scroll-margin) (point)) Caveat: I have no idea if this is "fast enough" for the purposes of pixel-scroll-precision-mode.
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
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Hermes SMTP Server) with ESMTPA ID 5ba4ec4d7d568842ba60b94828143f8d; Thu, 02 Nov 2023 06:17:03 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Aaron Jensen <aaronjensen@HIDDEN> Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression In-Reply-To: <CAHyO48xkxt3bHE2Sofn3XqABqHyzp=fn0UN53UytEuXwPCCECg@HIDDEN> (Aaron Jensen's message of "Wed, 1 Nov 2023 22:49:40 -0700") References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <CAHyO48xkxt3bHE2Sofn3XqABqHyzp=fn0UN53UytEuXwPCCECg@HIDDEN> Date: Thu, 02 Nov 2023 14:16:58 +0800 Message-ID: <8734xowug5.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.21890 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 1187 X-Spam-Score: -0.5 (/) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.5 (-) Aaron Jensen <aaronjensen@HIDDEN> writes: > It looks like the current code uses posn-at-point already, yes? What > is it that would make it too slow to use it again for the point? posn-at-point is presently not used by p-s-p-m. > I'm trying to understand the code and making some headway, but it's > still not totally clear what's happening and why. It does seem that if > you force a redisplay after the set-window-vscroll, the window-start > will move in the case that it butts up against the scroll margin. Yes, because redisplay is the process responsible for enforcing the scroll margin in the process of maintaining point within the window. > Is there a fast way to compute the position that is scroll-margin > lines away from the window start and then compare the point to that? > Or is the bigger problem when scrolling up? The problem is two-fold: a position must be calculated that is scroll-margin rows from the window start or end, but that position must be replaced by the position of the row farthest from the window boundary opposite the direction being scrolled in if there are fewer than scroll-margin rows displayed in the window _after_ the scroll completes.
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
Full text available.Received: (at 66769) by debbugs.gnu.org; 2 Nov 2023 05:50:26 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Nov 02 01:50:26 2023 Received: from localhost ([127.0.0.1]:53659 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qyQb3-000346-SA for submit <at> debbugs.gnu.org; Thu, 02 Nov 2023 01:50:26 -0400 Received: from mail-lf1-x12c.google.com ([2a00:1450:4864:20::12c]:46480) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <aaronjensen@HIDDEN>) id 1qyQb1-00033m-0F for 66769 <at> debbugs.gnu.org; Thu, 02 Nov 2023 01:50:23 -0400 Received: by mail-lf1-x12c.google.com with SMTP id 2adb3069b0e04-507e85ebf50so595617e87.1 for <66769 <at> debbugs.gnu.org>; Wed, 01 Nov 2023 22:49:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1698904182; x=1699508982; darn=debbugs.gnu.org; h=cc:to:subject:message-id:date:in-reply-to:from:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=xbHYqLFV42H/EiC0znYpVaBG75LMwLFvI57pQhVucr0=; b=gxODx2ROwGMUYL792D+3smvBnn9/MckwHhnjH8sZaoxw5iQkorCxkbZg6eNwOhDWXr HySpPzgz1DlDyURkBQCJjGydPJCxO43jgi5+twhC1TrErm/QNIEBPi7UVXgse2SvJmek xlOinMEStNThGGv91dC08ibHf/UmVuPjn9vBcJ4HeDeqJLjvJbRF3k4lWrsdk9MZ/ABT G7hdcHwVxxcKqiHiHQVSVBCHOUqZFXdEcKFhunZuSTqIzcy5k2UoHNYAKDRYhw+c172F zx7i9mSt5PzcPlGkK9Cj6y6JQl7I6I7vKp+EqMvMig/RepTdBF+0MC5GCr6KIoTK0jhC iV2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698904182; x=1699508982; h=cc:to:subject:message-id:date:in-reply-to:from:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=xbHYqLFV42H/EiC0znYpVaBG75LMwLFvI57pQhVucr0=; b=uxt3p4zlnLNnRsCAZDV9h1L5SGD9JQFEyd7Tv61Bw8IsXX8XzN52I1tD4gT4k/uLAd eFevL3rgPzHSozqRz3o2QgWFZmhWuD1PvdMTvsrLwoCadoRpyXWdv8diSQixAa95Kn5P KGRe+jvhimfEEvYlgRA012yOZb2OGT6NF0GXKUGLVBCcKybAC85pnBiqphs7FNhe5gjv jc19yZSSXEpTywvBCZquOq+QOeJHM/ZrNW2HaPw5e+uDw75892d9j/QaNaS3Ai0+SSao yqio0zrVrrvFbeZtxUvbKK8tjYrsxw/5YoTlALjyZ1nJR6fFf75p36SQwM9eTjLOCl35 2XxA== X-Gm-Message-State: AOJu0Yw7nWVjvAfAsSNDzT++zpps7PKR9O15XZdDv5bC1TAJwRsPDfJC S2zJH2UgocfP0ec63AOKbPCTPIS6/IkMaEF2oxY= X-Google-Smtp-Source: AGHT+IHFqfDgIIPSWKEaSc3cuUtxR19lUfKB6QXiRCE6Sm3SgJH2YiXBs2vXNmPLPbkk02IkCEZpXHJfUgeCrjQdgbY= X-Received: by 2002:a05:6512:2306:b0:509:115c:51de with SMTP id o6-20020a056512230600b00509115c51demr12122731lfu.25.1698904181417; Wed, 01 Nov 2023 22:49:41 -0700 (PDT) Received: from 649336022844 named unknown by gmailapi.google.com with HTTPREST; Wed, 1 Nov 2023 22:49:40 -0700 Mime-Version: 1.0 References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> From: Aaron Jensen <aaronjensen@HIDDEN> In-Reply-To: <877cn7xzg0.fsf@HIDDEN> X-Superhuman-ID: logro782.77ed2b4e-fb58-41ce-9e70-b8893290d679 X-Superhuman-Draft-ID: draft0099d055574b7adb X-Mailer: Superhuman Desktop (2023-11-01T19:13:16Z) Date: Wed, 1 Nov 2023 22:49:40 -0700 Message-ID: <CAHyO48xkxt3bHE2Sofn3XqABqHyzp=fn0UN53UytEuXwPCCECg@HIDDEN> Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression To: Po Lu <luangruo@HIDDEN> Content-Type: multipart/alternative; boundary="0000000000003dacfa060924f4a2" X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) --0000000000003dacfa060924f4a2 Content-Type: text/plain; charset="UTF-8" On Fri, Oct 27, 2023 at 10:17 PM, Po Lu <luangruo@HIDDEN> wrote: > Aaron Jensen <aaronjensen@HIDDEN> writes: > > Commit 1da4fca0647ebf1d5d6f12817301a17661560810 caused a regression of > bug#52231 > > The repro is the same: > > (progn (setq scroll-margin 4) > (pixel-scroll-precision-mode)) > > And scroll down a buffer with mouse wheel. > > The buffer does not scroll properly, it jumps back unless you scroll fast > enough. > > Hmm, I'm not certain what the solution to this should be. > > For images to scroll properly, the "target point" must be derived from > whether the point is visible after scrolling, instead of outside a set > number of rows from the window start or end. Yet the latter information is > mandatory if the scroll margin is to be taken into account, and no function > supplies both besides posn-at-point, which is much too slow. > > The immediate remedy is to restore the old code when scroll-margin is in > effect and document the consequent incapacity to scroll over large images > as an unfortunate corollary. Is that acceptable by you? > It looks like the current code uses posn-at-point already, yes? What is it that would make it too slow to use it again for the point? I'm trying to understand the code and making some headway, but it's still not totally clear what's happening and why. It does seem that if you force a redisplay after the set-window-vscroll, the window-start will move in the case that it butts up against the scroll margin. Is there a fast way to compute the position that is scroll-margin lines away from the window start and then compare the point to that? Or is the bigger problem when scrolling up? Aaron --0000000000003dacfa060924f4a2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <html><head></head><body><div><div><div class=3D""><div class=3D""><div cla= ss=3D""><div class=3D""><span style=3D"color:rgba(0,0,0,0.6)">On Fri, Oct 2= 7, 2023 at 10:17 PM, Po Lu </span><span dir=3D"ltr" class=3D""><<a href= =3D"mailto:luangruo@HIDDEN" target=3D"_blank" class=3D"">luangruo@yahoo.= com</a>></span><span style=3D"color:rgba(0,0,0,0.6)"> wrote:</span><br><= /div></div></div><div class=3D"sh-quoted-content"><div class=3D""><div clas= s=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .= 8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"gmail_extra"= ><div class=3D"gmail_quote"><p class=3D"">Aaron Jensen <<a target=3D"_bl= ank" rel=3D"noopener noreferrer" href=3D"mailto:aaronjensen@HIDDEN" clas= s=3D"">aaronjensen@<wbr>gmail.<wbr>com</a>> writes: <br></p><blockquote class=3D""><p class=3D""> Commit 1da4fca0647ebf1d5d6f12817301a17661560810 caused a regression of bug#52231 <br></p><p class=3D""> The repro is the same: <br></p><p class=3D""> (progn (setq scroll-margin 4) <br> (pixel-scroll-precision-mode)) </p><p class=3D""> And scroll down a buffer with mouse wheel. <br></p><p class=3D""> The buffer does not scroll properly, it jumps back unless you scroll fast enough. <br></p></blockquote><p class=3D""> Hmm, I'm not certain what the solution to this should be. <br></p><p class=3D""> For images to scroll properly, the "target point" must be derived= from whether the point is visible after scrolling, instead of outside a set number of rows from the window start or end. Yet the latter information is mandatory if the scroll margin is to be taken into account, and no function supplies both besides posn-at-point, which is much too slow. <br></p><p class=3D""> The immediate remedy is to restore the old code when scroll-margin is in effect and document the consequent incapacity to scroll over large images as an unfortunate corollary. Is that acceptable by you?<br></p></di= v></div></blockquote></div></div></div></div><div><div><br></div><div>It lo= oks like the current code uses posn-at-point already, yes? What is it that = would make it too=C2=A0slow to use it again for the point? I'm trying t= o understand the code and making some headway, but it's still not total= ly clear what's happening and why. It does seem that if you force a red= isplay after the=C2=A0set-window-vscroll, the window-start will move in the= case that it butts up against=C2=A0the scroll margin.=C2=A0<br></div><div>= <br></div><div>Is there a fast way to compute the=C2=A0position that is scr= oll-margin lines away from the window start and then compare the point to t= hat? Or is the bigger problem when scrolling up?<br></div><div><br></div><d= iv>Aaron</div><div><br></div></div><div><br></div></div><div></div></div></= body></html> --0000000000003dacfa060924f4a2--
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
Full text available.Received: (at 66769) by debbugs.gnu.org; 28 Oct 2023 12:55:49 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Oct 28 08:55:49 2023 Received: from localhost ([127.0.0.1]:37918 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qwiqy-0007nL-88 for submit <at> debbugs.gnu.org; Sat, 28 Oct 2023 08:55:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50804) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1qwiqk-0007mp-6O for 66769 <at> debbugs.gnu.org; Sat, 28 Oct 2023 08:55:46 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1qwiq8-00045g-LO; Sat, 28 Oct 2023 08:54:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=oIm/hgzPrSg0MTg6l9/LfhgUM/eG8KIAufowq5UjRkk=; b=YrzKb1xdqxXL XzTo6P6R5NvMUtwSs3bq1zfw7ngUlvXa838NhBtfrGsWxKsGh1ux32fV+NHUxsqpfyoaNBAVXzm9F PaFRdtp2jt4yZz6oyhvZlDlnPHN2R7Mn/OEkVZR+o/JYBGuiKeewsegsNQp72HLQ+k/ALi25MWjXX +rak3L7stK+13cfw/bbjVQ3wES7OG2mWb3Uyksl0dCOfh2vMdb3ST+NqvGVpjUc1hj/+Q9JXUmqD5 Ob1m6hwkD+9xA5GJ6wHV8ABrK1e7cqnOanF2al0pmLzQ2VLQVERnA6yOv4V93H+o7jAm7tT6l1ZAE kl9fyabc1AWTohmkMmhz5Q==; Date: Sat, 28 Oct 2023 15:54:49 +0300 Message-Id: <83fs1udi06.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Aaron Jensen <aaronjensen@HIDDEN> In-Reply-To: <CAHyO48xfzuwTZEsHOezwZXzFqoz16WNoXTMhJr6td+QKk6xRvg@HIDDEN> (message from Aaron Jensen on Sat, 28 Oct 2023 05:33:06 -0700) Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <83wmv7ckmw.fsf@HIDDEN> <87ttqbw66m.fsf@HIDDEN> <83sf5vcfqk.fsf@HIDDEN> <87pm0zw3g6.fsf@HIDDEN> <83r0lfcf4o.fsf@HIDDEN> <CAHyO48xfzuwTZEsHOezwZXzFqoz16WNoXTMhJr6td+QKk6xRvg@HIDDEN> X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 66769 Cc: luangruo@HIDDEN, 66769 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Aaron Jensen <aaronjensen@HIDDEN> > Date: Sat, 28 Oct 2023 05:33:06 -0700 > Cc: Po Lu <luangruo@HIDDEN>, 66769 <at> debbugs.gnu.org > > I gather that it is redisplay that attempts to reconcile scroll-margin, is that correct? Yes, of course. Moreover, the scrolling itself is done by the display engine, and it keeps point out of the scroll-margin as part of that. > If so, is there a way > to flip scroll-margin on its head such that it is only intentional point movement operations that cause > scroll-margin to trigger scrolling? i.e., when doing pixel scrolling, you either temporarily disable the > scroll margin (which has the negative impact of once a user does move the point, it will cause a > jump), Maybe someone will come up with some clever trick, but if so, it will be very fragile. You seem to think that redisplay knows what moved point, or more generally why there should be some change to be done on display, like whether it was the fact that point moved or something else. But that's not what happens. What actually happens is that redisplay is called whenever Emacs is idle, and it (redisplay) then needs to decide whether something should be done to redraw some part of the Emacs display, and if so, which parts and how to do that. The reason _why_ the display needs to be updated is mostly not known to the display engine, at least not in terms of user commands, which is the level which you seem to have in mind. Moreover, even if by some trick we succeed to "persuade" redisplay to refrain from some action, the very next redisplay cycle will almost certainly "forget" that reason and do what we don't want anyway. For example, if redisplay finds that point is inside the scroll margin, it will scroll the window or move point so as to have point out of scroll-margin. So any such temporary measure, even if it succeeds, will be almost immediately undone. > or, after a pixel scroll is done, you move the point to be outside of the bounds of the scroll > margin, rather than allowing the redisplay to change the scroll position. Perhaps that is what you are > describing and is what would require posn-at-point. AFAIU, this is what Po Lu was thinking about, and this is what he said would be too slow.
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
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I don't know how many people use scroll-margin, but I've used it for years. I suppose I just would have to choose between precision scrolling and scroll margin, but I would have to choose between them to support something that doesn't matter to me: scrolling with images. It also introduces additional complexity and variation in the scrolling code, which in general, means higher overall maintenance costs (not that it's my role to police this in Emacs). I gather that it is redisplay that attempts to reconcile scroll-margin, is that correct? If so, is there a way to flip scroll-margin on its head such that it is only intentional point movement operations that cause scroll-margin to trigger scrolling? i.e., when doing pixel scrolling, you either temporarily disable the scroll margin (which has the negative impact of once a user does move the point, it will cause a jump), or, after a pixel scroll is done, you move the point to be outside of the bounds of the scroll margin, rather than allowing the redisplay to change the scroll position. Perhaps that is what you are describing and is what would require posn-at-point. Aaron On Sat, Oct 28, 2023 at 4:42 AM, Eli Zaretskii <eliz@HIDDEN> wrote: > From: Po Lu <luangruo@HIDDEN> > Cc: aaronjensen@HIDDEN, 66769 <at> debbugs.gnu.org > Date: Sat, 28 Oct 2023 16:34:17 +0800 > > Eli Zaretskii <eliz@HIDDEN> writes: > > And what are the problems in computing this target point in the particular > case described here? > > It should be outside the scroll margin, so additional layout computations > must be performed after scrolling, compounding those performed beforehand > to establish the new window start. > > Even if it's done "only in this case"? It should slow down only this case, > no? > > And what exactly is the crucial difference between "this case" and the > other cases, where scrolling works correctly? > > The distinction is that scroll-margin is set. > > That's what I thought, and which is why I asked whether calling the slow > posn-at-point only when scroll-margin is non-zero wouldn't be the proper > solution, as it should only slow down scrolling for those users who set > scroll-margin. Or what am I missing? > --000000000000c994d30608c601d7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <html><head></head><body><div><div><div><div class=3D"">Depending on what &= quot;slow down to a crawl" means exactly in practice, I think the reas= on is that it would cripple a feature. I don't know how many people use= scroll-margin, but I've used it for years. I suppose I just would have= to choose between precision scrolling and scroll margin, but I would have = to choose between them to support something that doesn't matter to me: = scrolling with images.=C2=A0<br></div><div class=3D""><br></div><div class= =3D"">It also introduces additional complexity and variation in the scrolli= ng code, which in general, means higher overall maintenance costs (not that= it's my role to police this in Emacs).=C2=A0<br></div><div class=3D"">= <br></div><div class=3D"">I gather that it is redisplay that attempts to re= concile scroll-margin, is that correct? If so, is there a way to flip scrol= l-margin on its head such that it is only intentional point movement operat= ions that cause scroll-margin to trigger scrolling? i.e., when doing pixel = scrolling, you either temporarily disable the scroll margin (which has the = negative impact of once a user does move the point, it will cause a jump), = or, after a pixel scroll is done, you move the point to be outside of the b= ounds of the scroll margin, rather than allowing the redisplay to change th= e scroll position. Perhaps that is what you are describing and is what woul= d require=C2=A0<span style=3D"text-decoration-color:initial;text-decoration= -style:initial;font-weight:400" class=3D"">posn-at-point.</span><br></div><= /div><div></div><br><div class=3D"gmail_signature"><div><br>Aaron</div><br>= </div></div><br><div><div class=3D"gmail_quote">On Sat, Oct 28, 2023 at 4:4= 2 AM, Eli Zaretskii <span dir=3D"ltr"><<a href=3D"mailto:eliz@HIDDEN" t= arget=3D"_blank">eliz@HIDDEN</a>></span> wrote:<br><blockquote class=3D= "gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding= -left:1ex"><div class=3D"gmail_extra"><div class=3D"gmail_quote sh-color-bl= ack sh-color"><blockquote class=3D"sh-color-black sh-color"><p class=3D"sh-= color-black sh-color"> From: Po Lu <<a target=3D"_blank" rel=3D"noopener noreferrer" href=3D"ma= ilto:luangruo@HIDDEN" class=3D"sh-color-blue sh-color">luangruo@<wbr>yah= oo.<wbr>com</a>> <br> Cc: <a target=3D"_blank" rel=3D"noopener noreferrer" href=3D"mailto:aaronje= nsen@HIDDEN" class=3D"sh-color-blue sh-color">aaronjensen@<wbr>gmail.<wb= r>com</a>, <a target=3D"_blank" rel=3D"noopener noreferrer" href=3D"mailto= :66769 <at> debbugs.gnu.org" class=3D"sh-color-blue sh-color">66769@<wbr>debbugs= .<wbr>gnu.<wbr>org</a> <br> Date: <span class=3D"sh-date">Sat</span>, <span class=3D"sh-date">28 Oct 20= 23</span> 16:34:17 +0800 </p><p class=3D"sh-color-black sh-color"> Eli Zaretskii <<a target=3D"_blank" rel=3D"noopener noreferrer" href=3D"= mailto:eliz@HIDDEN" class=3D"sh-color-blue sh-color">eliz@<wbr>gnu.<wbr>or= g</a>> writes: </p><blockquote class=3D"sh-color-black sh-color"><p class=3D"sh-color-blac= k sh-color"> And what are the problems in computing this target point in the particular case described here? </p></blockquote><p class=3D"sh-color-black sh-color"> It should be outside the scroll margin, so additional layout computations must be performed after scrolling, compounding those performed beforehand to establish the new window start. </p><blockquote class=3D"sh-color-black sh-color"><p class=3D"sh-color-blac= k sh-color"> Even if it's done "only in this case"? It should slow down o= nly this case, no? </p><p class=3D"sh-color-black sh-color"> And what exactly is the crucial difference between "this case" an= d the other cases, where scrolling works correctly? </p></blockquote><p class=3D"sh-color-black sh-color"> The distinction is that scroll-margin is set. </p></blockquote><p class=3D"sh-color-black sh-color"> That's what I thought, and which is why I asked whether calling the slow posn-at-point only when scroll-margin is non-zero wouldn't be the proper solution, as it should only slow down scrolling for those users who set scroll-margin. Or what am I missing?</p></div></div></blockquote><= /div></div><br></div></body></html> --000000000000c994d30608c601d7--
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
Full text available.Received: (at 66769) by debbugs.gnu.org; 28 Oct 2023 08:42:44 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Oct 28 04:42:44 2023 Received: from localhost ([127.0.0.1]:37731 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qweu4-0000zj-5z for submit <at> debbugs.gnu.org; Sat, 28 Oct 2023 04:42:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37080) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1qweu0-0000zU-6B for 66769 <at> debbugs.gnu.org; Sat, 28 Oct 2023 04:42:42 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1qwetO-0001p8-DL; Sat, 28 Oct 2023 04:42:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=dyGerb1NP/v/a2uQ4brh7PnnR8JL0TLZ+Qv7nTv69P8=; b=nNNZuSowi0kZ xtZWRlJOcO1MymSESh0NO0mHD2ufTct7yTWfx/ELFsML5kgW1u6DoFZcEkltbAdG49YJy91Xiuao6 i/wwxQwhE13d2GPTx96jThhILtNrobVGuKsCXhqjkIkH6wYsXeM7MtaOwfQA6JgcJVVJ2xGKR7CRn oUPeEsanpQ9oA9twuSTD0qVuMf8mva1ZkvWLBgExwkA7WZqQxp4exOGBW6sj8OIycRpZw/oRfV/Vk JzmDaqgPgLgb1pMW7PuHtwnfwl/X/e0EO+MdPWKABz/VwSrcQERtZaF5rxDLx/xWnCS5Dq4bepjeQ RzzUrs8utL8rZNdOsEN4Cw==; Date: Sat, 28 Oct 2023 11:42:15 +0300 Message-Id: <83r0lfcf4o.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Po Lu <luangruo@HIDDEN> In-Reply-To: <87pm0zw3g6.fsf@HIDDEN> (message from Po Lu on Sat, 28 Oct 2023 16:34:17 +0800) Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <83wmv7ckmw.fsf@HIDDEN> <87ttqbw66m.fsf@HIDDEN> <83sf5vcfqk.fsf@HIDDEN> <87pm0zw3g6.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org, aaronjensen@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Po Lu <luangruo@HIDDEN> > Cc: aaronjensen@HIDDEN, 66769 <at> debbugs.gnu.org > Date: Sat, 28 Oct 2023 16:34:17 +0800 > > Eli Zaretskii <eliz@HIDDEN> writes: > > > And what are the problems in computing this target point in the > > particular case described here? > > It should be outside the scroll margin, so additional layout > computations must be performed after scrolling, compounding those > performed beforehand to establish the new window start. > > > Even if it's done "only in this case"? It should slow down only this > > case, no? > > > > And what exactly is the crucial difference between "this case" and the > > other cases, where scrolling works correctly? > > The distinction is that scroll-margin is set. That's what I thought, and which is why I asked whether calling the slow posn-at-point only when scroll-margin is non-zero wouldn't be the proper solution, as it should only slow down scrolling for those users who set scroll-margin. Or what am I missing?
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
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Hermes SMTP Server) with ESMTPA ID f9e0048e621c5cf519174dd4a94a075e; Sat, 28 Oct 2023 08:34:25 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression In-Reply-To: <83sf5vcfqk.fsf@HIDDEN> (Eli Zaretskii's message of "Sat, 28 Oct 2023 11:29:07 +0300") References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <83wmv7ckmw.fsf@HIDDEN> <87ttqbw66m.fsf@HIDDEN> <83sf5vcfqk.fsf@HIDDEN> Date: Sat, 28 Oct 2023 16:34:17 +0800 Message-ID: <87pm0zw3g6.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.21890 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 577 X-Spam-Score: -0.5 (/) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org, aaronjensen@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.5 (-) Eli Zaretskii <eliz@HIDDEN> writes: > And what are the problems in computing this target point in the > particular case described here? It should be outside the scroll margin, so additional layout computations must be performed after scrolling, compounding those performed beforehand to establish the new window start. > Even if it's done "only in this case"? It should slow down only this > case, no? > > And what exactly is the crucial difference between "this case" and the > other cases, where scrolling works correctly? The distinction is that scroll-margin is set.
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
Full text available.Received: (at 66769) by debbugs.gnu.org; 28 Oct 2023 08:29:34 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Oct 28 04:29:34 2023 Received: from localhost ([127.0.0.1]:37717 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qwehK-0000dN-Fk for submit <at> debbugs.gnu.org; Sat, 28 Oct 2023 04:29:34 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60154) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1qwehH-0000d7-W2 for 66769 <at> debbugs.gnu.org; Sat, 28 Oct 2023 04:29:32 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1qwegg-000848-Go; Sat, 28 Oct 2023 04:28:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=h8MIAadVOiG0DP2NCOY+vpzE7tVFQMQOf6TrG5bfUPY=; b=HHqsHJdHZMK1 /l/j9ebV3u2KCNENu3C4GD17A+7Sjl5kuEUFDcXRlzs65iv62fyOLi6SS+RrGgNmgLpYvn1D3Mb75 dzOJXnnqws0cgpHUn4y6ddkTC+uLQIvk3elIo05bL8l/ylvDaK2a78ACacEb/pJ2WCqhIYWiQS4fL G/lVUWJGxiCGfaDQwbh3lth3zZRb8wzEov0dtrjHbDV/6ItRB0Bb5XpvLQdqDqT8G+fTOFtEzVsj9 Agpr9YMU3F+MG1r0dtKm73ulcb8Zu+98NFTEgd6D7DlldYwdS23POKV//ZX04wQcWSeeCtapD6AGr R8TjF6LRxAha3DBH/coxGg==; Date: Sat, 28 Oct 2023 11:29:07 +0300 Message-Id: <83sf5vcfqk.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Po Lu <luangruo@HIDDEN> In-Reply-To: <87ttqbw66m.fsf@HIDDEN> (message from Po Lu on Sat, 28 Oct 2023 15:35:13 +0800) Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <83wmv7ckmw.fsf@HIDDEN> <87ttqbw66m.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org, aaronjensen@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Po Lu <luangruo@HIDDEN> > Cc: aaronjensen@HIDDEN, 66769 <at> debbugs.gnu.org > Date: Sat, 28 Oct 2023 15:35:13 +0800 > > Eli Zaretskii <eliz@HIDDEN> writes: > > > What is the "target point" in the above text? target for what? > > The position where point will be moved after the window start and > vscroll are adjusted, which is such that redisplay will not recenter or > otherwise undermine the scrolling operation. And what are the problems in computing this target point in the particular case described here? > > Why not use the too-slow posn-at-point, but only in this case? > > Because with that, precision scrolling slows down to a crawl. Even if it's done "only in this case"? It should slow down only this case, no? And what exactly is the crucial difference between "this case" and the other cases, where scrolling works correctly?
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
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Hermes SMTP Server) with ESMTPA ID 84434ce851364c371772c05c62c96d21; Sat, 28 Oct 2023 07:35:20 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression In-Reply-To: <83wmv7ckmw.fsf@HIDDEN> (Eli Zaretskii's message of "Sat, 28 Oct 2023 09:43:19 +0300") References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> <83wmv7ckmw.fsf@HIDDEN> Date: Sat, 28 Oct 2023 15:35:13 +0800 Message-ID: <87ttqbw66m.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.21890 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 416 X-Spam-Score: -0.5 (/) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org, aaronjensen@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.5 (-) Eli Zaretskii <eliz@HIDDEN> writes: > What is the "target point" in the above text? target for what? The position where point will be moved after the window start and vscroll are adjusted, which is such that redisplay will not recenter or otherwise undermine the scrolling operation. > Why not use the too-slow posn-at-point, but only in this case? Because with that, precision scrolling slows down to a crawl.
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
Full text available.Received: (at 66769) by debbugs.gnu.org; 28 Oct 2023 06:43:46 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Oct 28 02:43:46 2023 Received: from localhost ([127.0.0.1]:37655 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1qwd2w-0005lt-6k for submit <at> debbugs.gnu.org; Sat, 28 Oct 2023 02:43:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52434) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1qwd2t-0005le-HE for 66769 <at> debbugs.gnu.org; Sat, 28 Oct 2023 02:43:44 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1qwd2I-0005m5-9h; Sat, 28 Oct 2023 02:43:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=jQX+pN8LoFB7e3PrYqUAMm7qQVKu1HoY2vqsMcjaPNQ=; b=qVOjGqXzkobf jRVB3MT22tdr7kpYYrirqNI5NuMFtrKUT5/rdzGqakuRYADdaXWZjpRiZNO7EhASM+F+f3PigMAqu tSBefLtb1CJyD0RwdlGBOXeYUmY3oanJNz6PjDIMknt/2gwMUy6MzFOd0ti6yJC9aU8i2uHaYSlvr pkTHGUsxpZHSPfEyEDge95OMbkpbQtcLL1b+c+UWo/q3l1kdApit3YdbqTm2OKYCbGyOCAAPzamyt 2wcwo6Di9YgxTXF+2E1ERa5FHwY8wfJ4u4aHQDnHnNZFkDKFaJPU374Bijq0Wj6LOtnLYQNiISuEM vFy/tDjxDM5528xL9My+VQ==; Date: Sat, 28 Oct 2023 09:43:19 +0300 Message-Id: <83wmv7ckmw.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Po Lu <luangruo@HIDDEN> In-Reply-To: <877cn7xzg0.fsf@HIDDEN> (bug-gnu-emacs@HIDDEN) Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression References: <m2bkck8xso.fsf@HIDDEN> <877cn7xzg0.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org, aaronjensen@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Cc: 66769 <at> debbugs.gnu.org > Date: Sat, 28 Oct 2023 10:17:51 +0800 > From: Po Lu via "Bug reports for GNU Emacs, > the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN> > > Aaron Jensen <aaronjensen@HIDDEN> writes: > > > Commit 1da4fca0647ebf1d5d6f12817301a17661560810 caused a regression of > > bug#52231 > > > > The repro is the same: > > > > (progn (setq scroll-margin 4) > > (pixel-scroll-precision-mode)) > > > > And scroll down a buffer with mouse wheel. > > > > The buffer does not scroll properly, it jumps back unless you scroll > > fast enough. > > Hmm, I'm not certain what the solution to this should be. > > For images to scroll properly, the "target point" must be derived from > whether the point is visible after scrolling, instead of outside a set > number of rows from the window start or end. Yet the latter information > is mandatory if the scroll margin is to be taken into account, and no > function supplies both besides posn-at-point, which is much too slow. What is the "target point" in the above text? target for what? > The immediate remedy is to restore the old code when scroll-margin is in > effect and document the consequent incapacity to scroll over large > images as an unfortunate corollary. Is that acceptable by you? Why not use the too-slow posn-at-point, but only in this case?
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
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Hermes SMTP Server) with ESMTPA ID 2a6d88895f4935650a0eabee64a4b21b; Sat, 28 Oct 2023 02:17:56 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Aaron Jensen <aaronjensen@HIDDEN> Subject: Re: bug#66769: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression In-Reply-To: <m2bkck8xso.fsf@HIDDEN> (Aaron Jensen's message of "Fri, 27 Oct 2023 01:00:23 -0400") References: <m2bkck8xso.fsf@HIDDEN> Date: Sat, 28 Oct 2023 10:17:51 +0800 Message-ID: <877cn7xzg0.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.21890 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 987 X-Spam-Score: -0.5 (/) X-Debbugs-Envelope-To: 66769 Cc: 66769 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.5 (-) Aaron Jensen <aaronjensen@HIDDEN> writes: > Commit 1da4fca0647ebf1d5d6f12817301a17661560810 caused a regression of > bug#52231 > > The repro is the same: > > (progn (setq scroll-margin 4) > (pixel-scroll-precision-mode)) > > And scroll down a buffer with mouse wheel. > > The buffer does not scroll properly, it jumps back unless you scroll > fast enough. Hmm, I'm not certain what the solution to this should be. For images to scroll properly, the "target point" must be derived from whether the point is visible after scrolling, instead of outside a set number of rows from the window start or end. Yet the latter information is mandatory if the scroll margin is to be taken into account, and no function supplies both besides posn-at-point, which is much too slow. The immediate remedy is to restore the old code when scroll-margin is in effect and document the consequent incapacity to scroll over large images as an unfortunate corollary. Is that acceptable by you?
bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
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From: Aaron Jensen <aaronjensen@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 30.0.50; pixel-scroll-precision-mode and scroll-margin regression
Date: Fri, 27 Oct 2023 01:00:23 -0400
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Commit 1da4fca0647ebf1d5d6f12817301a17661560810 caused a regression of
bug#52231
The repro is the same:
(progn (setq scroll-margin 4)
(pixel-scroll-precision-mode))
And scroll down a buffer with mouse wheel.
The buffer does not scroll properly, it jumps back unless you scroll
fast enough.
In GNU Emacs 30.0.50 (build 1, aarch64-apple-darwin22.6.0, NS
appkit-2299.70 Version 13.6 (Build 22G120)) of 2023-10-17 built on
Aarons-Laptop.local
Windowing system distributor 'Apple', version 10.3.2487
System Description: macOS 14.1
Configured using:
'configure --disable-dependency-tracking --disable-silent-rules
--enable-locallisppath=/opt/homebrew/share/emacs/site-lisp
--infodir=/opt/homebrew/Cellar/emacs-plus@30/30.0.50/share/info/emacs
--prefix=/opt/homebrew/Cellar/emacs-plus@30/30.0.50 --with-xml2
--with-gnutls --with-native-compilation --without-compress-install
--without-dbus --without-imagemagick --with-modules --with-rsvg
--with-webp --with-ns --disable-ns-self-contained 'CFLAGS=-Os -w -pipe
-mmacosx-version-min=13
-isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk
-DFD_SETSIZE=10000 -DDARWIN_UNLIMITED_SELECT'
'CPPFLAGS=-I/opt/homebrew/opt/zlib/include
-I/opt/homebrew/opt/jpeg/include -I/opt/homebrew/opt/icu4c/include
-isystem/opt/homebrew/include -F/opt/homebrew/Frameworks
-isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk'
'LDFLAGS=-L/opt/homebrew/opt/zlib/lib -L/opt/homebrew/opt/jpeg/lib
-L/opt/homebrew/opt/icu4c/lib -L/opt/homebrew/lib
-F/opt/homebrew/Frameworks -Wl,-headerpad_max_install_names
-isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk
-L/opt/homebrew/opt/libgccjit/lib''
Configured features:
ACL GIF GLIB GMP GNUTLS JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY KQUEUE NS PDUMPER PNG RSVG SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM ZLIB
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Text
Minor modes in effect:
eval-sexp-fu-flash-mode: t
global-git-commit-mode: t
transient-posframe-mode: t
global-evil-mc-mode: t
evil-mc-mode: t
windmove-mode: t
global-flycheck-mode: t
flycheck-mode: t
xterm-mouse-mode: t
pixel-scroll-precision-mode: t
org-roam-db-autosync-mode: t
corfu-prescient-mode: t
corfu-history-mode: t
undo-fu-session-global-mode: t
undo-fu-session-mode: t
ws-butler-global-mode: t
ws-butler-mode: t
save-place-mode: t
winner-mode: t
tabspaces-mode: t
savehist-mode: t
delete-selection-mode: t
yas-global-mode: t
yas-minor-mode: t
vertico-prescient-mode: t
prescient-persist-mode: t
vertico-mouse-mode: t
vertico-mode: t
mini-frame-mode: t
better-jumper-mode: t
better-jumper-local-mode: t
global-auto-revert-mode: t
ns-auto-titlebar-mode: t
global-anzu-mode: t
anzu-mode: t
which-key-posframe-mode: t
which-key-mode: t
gcmh-mode: t
recentf-mode: t
repeat-mode: t
+popup-mode: t
evil-mode: t
evil-local-mode: t
server-mode: t
leader-key-leader-override-mode: t
global-leader-key-leader-override-mode: t
elpaca-use-package-mode: t
override-global-mode: t
global-display-line-numbers-mode: t
display-line-numbers-mode: t
global-eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tab-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
window-divider-mode: t
minibuffer-regexp-mode: t
line-number-mode: t
auto-fill-function: yas--auto-fill
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
/Users/aaronjensen/.emacs.d/elpaca/builds/lispy/elpa hides /Users/aaronjensen/.emacs.d/elpaca/builds/ivy/elpa
Features:
(shadow sort mail-extr emacsbug copy-as-format all-the-icons
data-material data-weathericons data-octicons data-fileicons
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org-clock cal-move magit-patch magit-subtree magit-gitignore semantic/ia
semantic/analyze/refs semantic/db-find semantic/db-ref semantic/senator
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org-crypt cal-iso avy consult dired-aux evil-nerd-commenter
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evil-collection-magit magit-bookmark magit-submodule magit-blame
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magit-files magit-refs magit-status magit package url-handlers
magit-repos magit-apply magit-wip magit-log which-func magit-diff
smerge-mode diff git-commit log-edit pcvs-util add-log magit-core
magit-autorevert magit-margin magit-transient magit-process with-editor
magit-mode transient-posframe transient magit-git magit-base crm
sh-script treesit executable tramp-cmds evil-mc evil-mc-command-execute
evil-mc-command-record evil-mc-cursor-make evil-mc-region
evil-mc-cursor-state evil-mc-undo evil-mc-vars evil-mc-known-commands
evil-mc-common evil-collection-helpful helpful cc-langs cc-vars cc-defs
trace evil-collection-edebug edebug evil-collection-debug debug
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windmove tab-line hide-mode-line popup-mode-core evil-collection-vterm
vterm bookmark tramp trampver tramp-integration files-x tramp-message
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oc-basic ol-eww eww url-queue mm-url ol-rmail ol-mhe ol-irc ol-info
ol-gnus nnselect gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls
dig gnus-sum shr pixel-fill kinsoku url-file svg dom browse-url
gnus-group gnus-undo gnus-start gnus-dbus dbus xml gnus-cloud nnimap
nnmail mail-source utf7 nnoo parse-time gnus-spec gnus-int gnus-range
message sendmail yank-media rfc822 mml mml-sec epa epg rfc6068
epg-config mm-decode mm-bodies mm-encode mailabbrev gmm-utils mailheader
gnus-win gnus nnheader gnus-util mail-utils range ol-docview doc-view
image-mode exif ol-bibtex bibtex iso8601 ol-bbdb ol-w3m ol-doi
org-link-doi evil-terminal-cursor-changer color flycheck xt-mouse
pixel-scroll cua-base org-download url-http url url-proxy url-privacy
url-expand url-methods url-history mailcap url-auth mail-parse rfc2231
rfc2047 rfc2045 mm-util ietf-drums mail-prsvr url-cookie
generate-lisp-file url-domsuf url-gw nsm puny async vulpea vulpea-meta
vulpea-select vulpea-buffer vulpea-db s vulpea-utils vulpea-note
org-roam-migrate org-roam-log org-roam-mode org-roam-capture org-roam-id
org-roam-node org-roam-db emacsql-sqlite-builtin sqlite org-roam-utils
org-roam-compat org-roam org-mac-link org-goto org-capture org-attach
evil-org-agenda evil-org imenu ox-odt rng-loc rng-uri rng-parse
rng-match rng-dt rng-util rng-pttrn nxml-parse nxml-ns nxml-enc xmltok
nxml-util ox-latex ox-icalendar org-agenda ox-ascii ox-gfm ox-md ox-html
table ox-publish ox org-element org-persist xdg org-id org-refile
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ob-ref ob-lob ob-table ob-exp org-macro org-src ob-comint org-pcomplete
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noutline outline ob-emacs-lisp ob-core ob-eval org-cycle org-table ol
org-fold org-fold-core org-keys oc org-loaddefs find-func cal-menu
calendar cal-loaddefs org-version org-compat org-macs emacsql-sqlite
emacsql-sqlite-common emacsql emacsql-compiler magit-section format-spec
dash jka-compr url-util cape corfu-prescient corfu-history corfu
evil-ruby-text-objects ruby-refactor elec-pair envrc inheritenv
evil-surround evil-matchit-evil-setup bundler inf-ruby compile
text-property-search comint ansi-osc ansi-color ruby-mode smie
undo-fu-session ws-butler vc-git diff-mode vertico-directory saveplace
winner tabspaces dired-x dired dired-loaddefs vc vc-dispatcher
cursor-sensor savehist delsel yasnippet vertico-prescient prescient
char-fold vertico-mouse vertico mini-frame better-jumper autorevert
filenotify ns-auto-titlebar evil-anzu anzu popup-mode-hacks
which-key-posframe posframe evil-collection-which-key which-key gcmh
recentf tree-widget repeat orderless popup-mode popup-mode-settings
evil-collection annalist evil-little-word cus-edit cus-start cus-load
wid-edit pp evil evil-integration evil-maps evil-commands reveal
evil-jumps evil-command-window evil-types evil-search evil-ex
evil-macros evil-repeat evil-states evil-core advice evil-common
thingatpt rect evil-vars memoize nano-modeline nano-light-theme
face-remap nano-theme disp-table gcmh-autoloads copy-as-format-autoloads
pdf-tools-autoloads tablist-autoloads restclient-autoloads
vterm-autoloads dumb-jump-autoloads popup-autoloads haml-mode-autoloads
emmet-mode-autoloads terraform-mode-autoloads hcl-mode-autoloads
dockerfile-mode-autoloads yaml-mode-autoloads json-mode-autoloads
json-snatcher-autoloads grip-mode-autoloads lua-mode-autoloads
bundler-autoloads inf-ruby-autoloads ruby-refactor-autoloads
evil-ruby-text-objects-autoloads sotlisp-autoloads elisp-def-autoloads
lispyville-autoloads lispy-autoloads zoutline-autoloads swiper-autoloads
ivy-autoloads iedit-autoloads eros-autoloads eval-sexp-fu-autoloads
web-mode-autoloads ripgrep-capf-autoloads git-link-autoloads
consult-git-commit-autoloads git-timemachine-autoloads
magit-delta-autoloads xterm-color-autoloads prettier-autoloads
editorconfig-autoloads nvm-autoloads iter2-autoloads flycheck-autoloads
pkg-info-autoloads epl-autoloads lsp-ui-autoloads lsp-mode-autoloads
markdown-mode-autoloads spinner-autoloads imenu-list-autoloads
org-superstar-autoloads ox-gfm-autoloads org-pandoc-import-autoloads
gnuplot-autoloads org-download-autoloads async-autoloads
org-journal-autoloads vulpea-autoloads org-roam-autoloads
emacsql-autoloads orgonomic-autoloads org-drill-autoloads
persist-autoloads org-appear-autoloads org-mac-link-autoloads
evil-org-autoloads evil-terminal-cursor-changer-autoloads
transient-posframe-autoloads better-jumper-autoloads
buffer-move-autoloads rotate-autoloads mini-frame-autoloads
embark-consult-autoloads embark-autoloads consult-autoloads
orderless-autoloads cape-autoloads corfu-prescient-autoloads
corfu-autoloads vertico-prescient-autoloads vertico-autoloads
prescient-autoloads tabspaces-autoloads which-key-posframe-autoloads
which-key-autoloads popup-mode-autoloads hide-mode-line-autoloads
evil-anzu-autoloads anzu-autoloads titlecase-autoloads wgrep-autoloads
yasnippet-autoloads form-feed-autoloads drag-stuff-autoloads
dtrt-indent-autoloads ws-butler-autoloads evil-collection-autoloads
annalist-autoloads evil-mc-autoloads evil-numbers-autoloads
speeddating-autoloads evil-little-word-autoloads evil-matchit-autoloads
evil-nerd-commenter-autoloads evil-visualstar-autoloads
evil-surround-autoloads vundo-autoloads undo-fu-session-autoloads
ztree-autoloads dwim-shell-command-autoloads treemacs-tab-bar-autoloads
treemacs-magit-autoloads magit-autoloads magit-section-autoloads
git-commit-autoloads with-editor-autoloads treemacs-evil-autoloads
evil-autoloads goto-chg-autoloads treemacs-autoloads cfrs-autoloads
ht-autoloads pfuture-autoloads ace-window-autoloads avy-autoloads
all-the-icons-autoloads rainbow-mode-autoloads posframe-autoloads
ns-auto-titlebar-autoloads nano-modeline-autoloads nano-theme-autoloads
memoize-autoloads envrc-autoloads inheritenv-autoloads helpful-autoloads
elisp-refs-autoloads f-autoloads s-autoloads dired-subtree-autoloads
dired-hacks-utils-autoloads dash-autoloads project server pcase hydra lv
url-parse auth-source eieio eieio-core password-cache json map url-vars
edmacro kmacro byte-opt ring compdef derived leader-key bind-map
no-littering compat compdef-autoloads hydra-autoloads lv-autoloads
leader-key-autoloads bind-map-autoloads no-littering-autoloads
compat-autoloads elpaca-use-package use-package use-package-ensure
use-package-delight use-package-diminish use-package-bind-key bind-key
easy-mmode use-package-core elpaca-use-package-autoloads elpaca
elpaca-process elpaca-autoloads comp comp-cstr warnings subr-x rx cl-seq
cl-macs gv bytecomp byte-compile cl-extra help-mode icons cl-loaddefs
cl-lib display-line-numbers rmc iso-transl tooltip cconv eldoc paren
electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
term/ns-win ns-win ucs-normalize mule-util term/common-win touch-screen
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq
simple cl-generic indonesian philippine cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite emoji-zwj charscript charprop case-table
epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button
loaddefs theme-loaddefs faces cus-face macroexp files window
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget keymap hashtable-print-readable backquote threads kqueue
cocoa ns lcms2 multi-tty make-network-process native-compile emacs)
Memory information:
((conses 16 2080572 2381461) (symbols 48 77654 1056) (strings 32 451266 180979)
(string-bytes 1 11467384) (vectors 16 155030) (vector-slots 8 3667916 2180885)
(floats 8 1945 7523) (intervals 56 76874 1098) (buffers 992 36))
Aaron Jensen <aaronjensen@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#66769; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.