From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Dmitry Gutov Newsgroups: gmane.emacs.devel Subject: Re: Variable-width font indentation Date: Tue, 6 Mar 2018 17:15:29 +0200 Message-ID: <64941465-696a-4da1-a2af-e0258b8776fa@yandex.ru> References: <87inaiss6l.fsf@web.de> <6FCF6ACA-4F29-4B6B-BE9D-D7130C6E9495@gnu.org> <87fu5moe4c.fsf@web.de> <877eqyocro.fsf@web.de> <83zi3uz4nb.fsf@gnu.org> <0b1dd3fa-e0b0-ed20-a256-dd92d1c1826f@dancol.org> <8bc3c4c7-dfc7-987a-95e7-bd309e2326c6@cs.ucla.edu> <03118DC0-39DA-4AB5-980E-A33809B9A5EE@raeburn.org> <83vaeas8uz.fsf@gnu.org> <29d3eeff-f9a9-ec31-f72c-cfbd7d00f7e0@cs.ucla.edu> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1520349233 3415 195.159.176.226 (6 Mar 2018 15:13:53 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 6 Mar 2018 15:13:53 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Thunderbird/59.0 Cc: raeburn@raeburn.org, rms@gnu.org, emacs-devel@gnu.org To: Paul Eggert , dancol@dancol.org, Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Mar 06 16:13:48 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 1etEHc-0007vO-GJ for ged-emacs-devel@m.gmane.org; Tue, 06 Mar 2018 16:13:40 +0100 Original-Received: from localhost ([::1]:56388 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1etEJf-0008JX-7y for ged-emacs-devel@m.gmane.org; Tue, 06 Mar 2018 10:15:47 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45083) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1etEJZ-0008JI-2b for emacs-devel@gnu.org; Tue, 06 Mar 2018 10:15:42 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1etEJT-0002nb-4U for emacs-devel@gnu.org; Tue, 06 Mar 2018 10:15:41 -0500 Original-Received: from mail-wr0-x233.google.com ([2a00:1450:400c:c0c::233]:38252) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1etEJS-0002mp-Tq; Tue, 06 Mar 2018 10:15:35 -0500 Original-Received: by mail-wr0-x233.google.com with SMTP id n7so21321155wrn.5; Tue, 06 Mar 2018 07:15:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=EIOqvczLrUVtn0i6xcPlax0+Z+DYPlV9736B6bWTAjs=; b=VUkuT+BW2Jhl0UTg8/chgawsqU+9Ww88Ol+PxXBfrAyy6pab/Rn5CX2cW2uV/WF2Xd aDo+Z6iy29PJnz49+c0QXkvIDReMdQ17+XGwfMCFops7aOTy0lxCLIKnSHk28rZ8jK+y z94oQEMmqXyfWWw/89G5Lrzv4Ep/G6eELlKgH5SNge1YNIqUfaPNJZSZHfXdDnCP5nNt +7atGX/zIKGZKzGqzFI23EvobztN23TwbIAd+a5eqat4x+behw36XFWZGEmW7SgI/PdR VHUPW9YFuO85noRmcGQtKldyslZbAGINiOiPiTkRVwgrlko/8tKdWpso7NIoC7xTJ6pu 9mHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=EIOqvczLrUVtn0i6xcPlax0+Z+DYPlV9736B6bWTAjs=; b=sWJO5evrOJ8+2kAY3uPBGT2epU1lJednTYZ+6E78IAMugsW+QDg5tj34015jdh8UF0 ddsMy5FI8LN//zumn75S1TyQuhNmZk04jstbze6JVQ4S1HdoK3J50cU2JlLUITJVRrG1 zgb0HMNMykFgAbv/dZ2g+924wbave+B+HnKyGYW8l4BIfxX1G8wlfDvcjXcCcF9H72Z/ c3qOGzs8U6e/SK5m4JreqKgzr7JTntGfXg71i0TK8MXR2wOX1lEO+Y68iAZXMJKpskDG w7GNO2sW2IQCslQc2U4vaDiZOaBNlVZ3ZPM7Z0Ew8wHid6GX1p4GEQXSLiqLtWT2R7ra TmCg== X-Gm-Message-State: APf1xPAJjPbx9s1g4+46KgHu5TeDi9SO85BGw6MOAeaIm/S49OzUERPd C6nPXg+YBfQdGGDQplHKUTOIhLdt X-Google-Smtp-Source: AG47ELvB+sYSNBsJlA+jeYP6jGH6IIYP4TI55sCcCt8BlTjDqz/Ea770rGTYboc7umPKXmk0tLUhlQ== X-Received: by 10.223.143.101 with SMTP id p92mr15887061wrb.241.1520349333171; Tue, 06 Mar 2018 07:15:33 -0800 (PST) Original-Received: from [192.168.0.174] ([212.50.99.193]) by smtp.googlemail.com with ESMTPSA id 74sm1963410wmf.26.2018.03.06.07.15.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Mar 2018 07:15:31 -0800 (PST) In-Reply-To: <29d3eeff-f9a9-ec31-f72c-cfbd7d00f7e0@cs.ucla.edu> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:400c:c0c::233 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:223329 Archived-At: On 3/5/18 9:49 PM, Paul Eggert wrote: > On 03/05/2018 11:32 AM, dancol@dancol.org wrote: >> 1: void foo(int a, >> 2:          int b) >> 3: { >> 4:  ... >> >> How is any generic indentation system supposed to know that the "i" on >> line 2 is supposed to line up with the "i" on line 1? > > It assumes the input is fixed-width, and that leading white space is > intended to indent with respect to previous lines. Although it'd be some > work to get Emacs to do this, I don't offhand see any algorithmic > problem here. If the way whitespace at bol is rendered depends on indentation code, will the mean that while scrolling a buffer the display engine will have to call indentation code?