Stefan Kangas <stefankangas@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 74178) by debbugs.gnu.org; 2 Nov 2024 18:45:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Nov 02 14:45:14 2024 Received: from localhost ([127.0.0.1]:54978 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1t7J7Z-0004e0-Tm for submit <at> debbugs.gnu.org; Sat, 02 Nov 2024 14:45:14 -0400 Received: from eggs.gnu.org ([209.51.188.92]:34380) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1t7J7W-0004ZP-QQ for 74178 <at> debbugs.gnu.org; Sat, 02 Nov 2024 14:45:11 -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 1t7J7R-0003fh-9l; Sat, 02 Nov 2024 14:45:05 -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=68vjy1iWRUVzUZ+xCS41T713yF1IkxsWtRbeCFcgiSA=; b=d98WwEhM+x6r +S59sDE56nCzsRCRmQb+1Lox5CHTTQwV8MtQPf2TV5jY1VAFVi7pc2DfwWsdllDQf5HfrwURBzNzj QoLKL3GpaOQvlbK+vM/AZnOmCZ8S5eezVQTZaO/N6AWkb1PpkxHJjU00qEx41GKe1VQuUjrZVWWOo 56k2rJWhwhXmdA4c3nNeVqkey4BiG3WoZEXX6uBhx+qeWprejr6dpMh2vvPnZfuYnr2GSV3wYmIrS Ix9E0nJ0yEtNoRmaPKjHScC4JkGTOAo6RhGtpl/k4+E86JELr83Ujdvmbi8uLNKFJSkQMPhlXr3yg xiIvtl10qMw4E8FtUNCiYg==; Date: Sat, 02 Nov 2024 20:45:02 +0200 Message-Id: <865xp5xyoh.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: dannym@HIDDEN In-Reply-To: <0977f406630ca447c857de6c38a9df7e@HIDDEN> (dannym@HIDDEN) Subject: Re: bug#74178: Handle tab stops on display so they work in variable-pitch-mode References: <0977f406630ca447c857de6c38a9df7e@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 74178 Cc: 74178 <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 (---) > Date: Sat, 02 Nov 2024 19:06:54 +0100 > From: dannym@HIDDEN > > Right now, when using variable-pitch-mode, there's no way for the user > to make tables. This patch adds a feature to do that. > > This patch handles tab-stop-list in the display part of emacs so that > they work as expected when using variable-pitch-mode. > > The unit of the values in tab-stop-list is space characters. > > The reasons why those values are in space characters are: > > - Works with HiDPI and LoDPI screens the same way with the same values > inside tab-stop-list. > - Works in console emacs. > - Works in graphical emacs. > - Is backward compatible. > > My assumption is that existing user files either don't have any '\t' > in their buffers or they are using the (previous) high-level version > of emacs tab-stop-list (which will replace all '\t' by some spaces), > not both. This way, emacs without the patch is forward-compatible > to emacs with the patch. > > This is a version that will use tabs in the order they appear in the > tab-stop-list, (on purpose) regardless of whether the text on the > line already exceeded the respective tab stop position (because it's > still better not to use the wrong column in the table). > > Each respective tab stop, in order, will be used for a respective > '\t', per line. If these fixed tab stops are used up, it will fall > back to the automatic tab stops every tab_width that emacs also > already had done before. > > The list of tab stops is buffer-local--as before. Thanks, but please tell how this feature is intended to be used. In particular, what would be the value of the new buffer-local variable, and how will the tab stops of this value be determined by users or Lisp programs who want to take advantage of this feature? There are also some technical problems with the idea of your implementation: for example, it sounds like the display iterator will need to always start from the beginning of a physical line, otherwise it will be unable to correctly account for the tab stops before the position where it is initialized. But let's ignore these aspects for now and talk about the general idea, because it's possible that the feature could be implemented in some other way that is free of these problems. P.S. There's also the issue of assigning to the FSF the copyright for your work, without which we will be unable to accept a contribution of this size. Should I send you the form to fill and the instructions, to start the legal paperwork rolling?
bug-gnu-emacs@HIDDEN:bug#74178; Package emacs.
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Sat, 02 Nov 2024 18:06:54 +0000 Received: from webmail.friendly-machines.com (ip-66-33-200-4.dreamhost.com [66.33.200.4]) (Authenticated sender: dannym@HIDDEN) by pdx1-sub0-mail-a254.dreamhost.com (Postfix) with ESMTPA id 4Xglzy33C6z1L for <bug-gnu-emacs@HIDDEN>; Sat, 2 Nov 2024 11:06:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=friendly-machines.com; s=dreamhost; t=1730570814; bh=6l50YC4ZvVlG+klRHcFrxTY8LQHGAGEGLZ2/6IxDV9s=; h=Date:From:To:Subject:Content-Type; b=SGbkPO3Fz4/UipjQk26wC+z0cYasR9iAq80RCB+JzAQ0PNrgnWdPghGk4U10Y5ugx spvbWq9TmmTmZqVWGEkmL0Hq3XukKqmSNSrefjlddPvu5sLwxoxLI8t7jj+QC7h+el zyBWRZg9eXz23no+fo2Ee3mP6XX6FXYuceeDGk6kItr+yJIZPPLnzJaIdS2QJm/be0 D46pMI16Y4iNegSz99Xa/H4De6fh9nmhmlXXhz5OgJIVw/KRmvzSuSdMNSBcFIKwjy 3oxMJnMLzkLs5doOyX1X5UtGCwOrQuuue8NIunpjAi8P+Sl2tnCZMzKClfGJbOJB49 6ZlO+X2n4yGDg== MIME-Version: 1.0 Date: Sat, 02 Nov 2024 19:06:54 +0100 From: dannym@HIDDEN To: bug-gnu-emacs@HIDDEN Subject: Handle tab stops on display so they work in variable-pitch-mode User-Agent: Roundcube Webmail/1.5.0 Message-ID: <0977f406630ca447c857de6c38a9df7e@HIDDEN> X-Sender: dannym@HIDDEN Content-Type: multipart/mixed; boundary="=_9104b8db68e8b3b9e0d90f4c10fd313d" Received-SPF: pass client-ip=23.83.223.36; envelope-from=dannym@HIDDEN; helo=cichlid.cherry.relay.mailchannels.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-Debbugs-Envelope-To: submit 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: -2.4 (--) --=_9104b8db68e8b3b9e0d90f4c10fd313d Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; format=flowed Hello, Right now, when using variable-pitch-mode, there's no way for the user to make tables. This patch adds a feature to do that. This patch handles tab-stop-list in the display part of emacs so that they work as expected when using variable-pitch-mode. The unit of the values in tab-stop-list is space characters. The reasons why those values are in space characters are: - Works with HiDPI and LoDPI screens the same way with the same values inside tab-stop-list. - Works in console emacs. - Works in graphical emacs. - Is backward compatible. My assumption is that existing user files either don't have any '\t' in their buffers or they are using the (previous) high-level version of emacs tab-stop-list (which will replace all '\t' by some spaces), not both. This way, emacs without the patch is forward-compatible to emacs with the patch. This is a version that will use tabs in the order they appear in the tab-stop-list, (on purpose) regardless of whether the text on the line already exceeded the respective tab stop position (because it's still better not to use the wrong column in the table). Each respective tab stop, in order, will be used for a respective '\t', per line. If these fixed tab stops are used up, it will fall back to the automatic tab stops every tab_width that emacs also already had done before. The list of tab stops is buffer-local--as before. I successfully tested both console and graphical emacs. In GNU Emacs 29.4 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) System Description: Guix System Configured using: 'configure CONFIG_SHELL=/gnu/store/3jhfhxdf6v5ms10x5zmnl166dh3yhbr1-bash-minimal-5.1.16/bin/bash SHELL=/gnu/store/3jhfhxdf6v5ms10x5zmnl166dh3yhbr1-bash-minimal-5.1.16/bin/bash --prefix=/gnu/store/9q1cfyj0bk0lqvx75pg9gn4isnlz2llv-emacs-pgtk-29.4 --enable-fast-install --with-pgtk --with-cairo --with-modules --with-native-compilation=aot --disable-build-details' --=_9104b8db68e8b3b9e0d90f4c10fd313d Content-Transfer-Encoding: base64 Content-Type: text/x-diff; name=emacs-tab-stops-v2.patch Content-Disposition: attachment; filename=emacs-tab-stops-v2.patch; size=8703 ZGlmZiAtcnUgJy1GXltfYS16QS1aMC05JF1cKyAqKCcgb3JpZy9lbWFjcy0yOS40L0NoYW5nZUxv ZyBlbWFjcy0yOS40L0NoYW5nZUxvZwotLS0gb3JpZy9lbWFjcy0yOS40L0NoYW5nZUxvZwkxOTcw LTAxLTAxIDAxOjAwOjAxLjAwMDAwMDAwMCArMDEwMAorKysgZW1hY3MtMjkuNC9DaGFuZ2VMb2cJ 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dannym@HIDDEN:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#74178; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.