From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Juri Linkov Newsgroups: gmane.emacs.devel Subject: Re: "whether the global keymap C-x 4 will be replaced by a command," Date: Thu, 16 Jul 2020 02:54:30 +0300 Organization: LINKOV.NET Message-ID: <87y2nkbah5.fsf@mail.linkov.net> References: <83ft9woo68.fsf@gnu.org> <87wo377wxp.fsf_-_@mail.linkov.net> <83ft9um9op.fsf@gnu.org> <838sfmm54o.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="23433"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (x86_64-pc-linux-gnu) Cc: Eli Zaretskii , rms@gnu.org, emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Jul 16 01:56:43 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jvrGV-0005yO-QH for ged-emacs-devel@m.gmane-mx.org; Thu, 16 Jul 2020 01:56:43 +0200 Original-Received: from localhost ([::1]:37454 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jvrGU-00010J-QY for ged-emacs-devel@m.gmane-mx.org; Wed, 15 Jul 2020 19:56:42 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50070) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jvrFy-0000aL-Fq for emacs-devel@gnu.org; Wed, 15 Jul 2020 19:56:10 -0400 Original-Received: from relay5-d.mail.gandi.net ([217.70.183.197]:35749) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jvrFv-0001iZ-Vm; Wed, 15 Jul 2020 19:56:10 -0400 X-Originating-IP: 91.129.103.18 Original-Received: from mail.gandi.net (m91-129-103-18.cust.tele2.ee [91.129.103.18]) (Authenticated sender: juri@linkov.net) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id C11FA1C0003; Wed, 15 Jul 2020 23:56:02 +0000 (UTC) In-Reply-To: (Stefan Monnier's message of "Wed, 15 Jul 2020 00:06:14 -0400") Received-SPF: pass client-ip=217.70.183.197; envelope-from=juri@linkov.net; helo=relay5-d.mail.gandi.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/15 19:56:04 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:252972 Archived-At: > Prefix commands give structure to the space of key-bindings. > E.g. the new `C-x 4 4` prefix command makes almost all the special > `foo-other-window` commands (and their key bindings) redundant. It seems one of remaining major problems is how to make the most frequently used key sequences for other-window commands shorter, e.g. how to reduce `C-x 4 4 C-x C-f` to just `C-x 4 C-f`. This suggests there is a need for a new general function that could be used in a prefix command. Such function should prepare the environment for the next command to run it with modified variable bindings. Currently I have no idea for implementation, but maybe it's possible for a such function (and the prefix command where it's used) to return a closure in which the next command should be invoked? Then it could bind `overriding-terminal-local-map` (instead of using `set-transient-map`) and also bind `display-buffer-overriding-action` (instead of using `display-buffer-override-next-command`). This will also solve the problem of setting `default-directory` for `C-x p p` (project-switch-project). As explained in https://debbugs.gnu.org/41890#196 currently it's not possible to bind the value of `default-directory` for the next command, but with a closure the variable binding will have the effect during the next command.