From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Jefferson Carpenter Newsgroups: gmane.emacs.devel Subject: Re: show-enclosing-scopes Date: Wed, 16 May 2018 21:46:08 +0000 Message-ID: <258be7dd-0bf6-f5b1-20d1-08ea65a177e8@gmail.com> References: <5cb3e5a6-310f-1f2a-ceb8-01b929158ebb@gmail.com> <594F9BDF-F041-4B8D-8425-0BE2AABAA448@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1526507071 21856 195.159.176.226 (16 May 2018 21:44:31 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 16 May 2018 21:44:31 +0000 (UTC) User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 To: Eli Zaretskii , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed May 16 23:44:27 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fJ4Dg-0005X2-Sk for ged-emacs-devel@m.gmane.org; Wed, 16 May 2018 23:44:25 +0200 Original-Received: from localhost ([::1]:42533 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fJ4Fo-0008Ug-1L for ged-emacs-devel@m.gmane.org; Wed, 16 May 2018 17:46:36 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:34015) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fJ4FX-0008T8-3L for emacs-devel@gnu.org; Wed, 16 May 2018 17:46:19 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fJ4FW-00078G-6P for emacs-devel@gnu.org; Wed, 16 May 2018 17:46:19 -0400 Original-Received: from mail-it0-x232.google.com ([2607:f8b0:4001:c0b::232]:54864) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fJ4FW-00077w-0W; Wed, 16 May 2018 17:46:18 -0400 Original-Received: by mail-it0-x232.google.com with SMTP id z6-v6so5828636iti.4; Wed, 16 May 2018 14:46:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=I2uhTQC2KXnJI0Rfj1athstoRrDw/V91pK/P5AqL9xI=; b=NHFVyWfZ0Tt6n7VBfK5H2Qa/BEV8Awi+qj5/5WINs4qH2Yz5Z917gNZ6X5qVO2X5VS EnwAaLmHp90V1I0JNUuTLD0+a3sCew0BmSgNivPtFT7mxlRh9+dZmMzRSnyMCi99nNPU pd3JZWt1vKbqDo096+51DhvROm0/5ZeAewj4kBS3vjIrBGXNy4qQqKZTvoF65pbdaaET 7eFitT56UTvX9amUtIHrqYjSI7p70oxGpP2I/eBRTRojumDRgqZ1uPzj3yTRkbAwQc8X jQZEYImCPFgy75CCiHLfuRb8y9DxOb/iaIjoMYUPM9PqL8FxX9wBkamuvIy94IxG6bQ2 qN7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=I2uhTQC2KXnJI0Rfj1athstoRrDw/V91pK/P5AqL9xI=; b=HY2kSulgt+oPOT3jcxnbJ6dXy12LLdMc/jRPAJIicYKXmBVTcj/dw+9SiOkYRD1ckt /cyndA53irH0KVapYqBSed7mf30okD83i8QvRdCjartdVfb68QIRbgMOojEZ4/J3d4SO 7g/ScuFw1h3lalJPKShfDOWfss3Sd2t+p/vVVfn2oHNRBF7+xjoaN+RncvytiexmqcE0 cTQCWhY/zGGhnlmOKDtmMzpXyPEml0LOu9krF2F7kIvikrUkipgZ7AVzhcV+2D8aUZJG BAgri332vEqAIgd3GNZTO32ygVYbOkgmJRQzf020Y3jTGHrG0kCksHZuu1WNJ/B18eG6 4ngA== X-Gm-Message-State: ALKqPwfmbiI2DPQ7pifvJj4MgleAvfkCVVGIIoJIfJ4liwSQWMKWXtO/ 3odVXrB143indChv+C/L6LdCpNaa X-Google-Smtp-Source: AB8JxZqBHHvULQKrKGBqsZ0NF8uklMvKVwcU12ATfR2MLEYvqignP9IoRgbqsUq8+XCnD4e4ujll8A== X-Received: by 2002:a24:9588:: with SMTP id m130-v6mr75477itd.58.1526507177049; Wed, 16 May 2018 14:46:17 -0700 (PDT) Original-Received: from ?IPv6:2601:441:8680:4631:a5e5:7463:6646:c0a9? ([2601:441:8680:4631:a5e5:7463:6646:c0a9]) by smtp.gmail.com with ESMTPSA id w142-v6sm2207798ita.21.2018.05.16.14.46.15 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 May 2018 14:46:15 -0700 (PDT) In-Reply-To: <594F9BDF-F041-4B8D-8425-0BE2AABAA448@gnu.org> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4001:c0b::232 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:225352 Archived-At: replying to all On 5/16/2018 8:03 AM, Eli Zaretskii wrote> AFIU, you have there a function on pre-command-hook that > deletes a window and then forces redisplay. So I'd say you get what > you asked for? Yeah, maybe :) > I don't think I understand why scroll commands rewuire that. Open a blank buffer and enter some text into it, for example "C-x ( F3 C-x ) C-u 20 C-x e". Then, run (progn (scroll-up 1) (beginning-of-buffer)) The window scrolls up by 1 line and point is moved to the middle of the screen, even though (beginning-of-buffer) is sequenced after (scroll-up 1). Compare with: (progn (scroll-up 1) (redisplay) (beginning-of-buffer)) This moves point to the beginning of the buffer, the (scroll-up 1) call essentially becoming a no-op. This is why (redisplay) is used in my code: it appears to flush the internal state set by scroll-up and scroll-down, so that (beginning-of-buffer) has the intended effect.