From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Ctrl-[ ? Date: Thu, 06 Jun 2019 16:01:44 +0300 Message-ID: <838suesw93.fsf@gnu.org> References: <08AC8151-5911-40FA-8B20-818B839D00AB@traduction-libre.org> <6F55E018-B15E-42B0-8794-21F55BBA23D3@traduction-libre.org> <34E3289C-10EE-4A23-AEE4-80D984DB2EDE@gnu.org> <6A538FF9-94C8-491D-B1B9-5C0D09FE7C39@acm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="132127"; mail-complaints-to="usenet@blaine.gmane.org" Cc: jean.christophe.helary@traduction-libre.org, emacs-devel@gnu.org To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jun 06 15:02:17 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hYs24-000YDC-3R for ged-emacs-devel@m.gmane.org; Thu, 06 Jun 2019 15:02:16 +0200 Original-Received: from localhost ([127.0.0.1]:60271 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hYs22-0001d7-97 for ged-emacs-devel@m.gmane.org; Thu, 06 Jun 2019 09:02:14 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:33563) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hYs1v-0001cz-6C for emacs-devel@gnu.org; Thu, 06 Jun 2019 09:02:09 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:45065) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hYs1m-00052D-96; Thu, 06 Jun 2019 09:02:00 -0400 Original-Received: from [176.228.60.248] (port=3966 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hYs1l-0007Q8-AJ; Thu, 06 Jun 2019 09:01:58 -0400 In-reply-to: <6A538FF9-94C8-491D-B1B9-5C0D09FE7C39@acm.org> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Thu, 6 Jun 2019 14:44:31 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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:237275 Archived-At: > From: Mattias Engdegård > Date: Thu, 6 Jun 2019 14:44:31 +0200 > Cc: Emacs developers , > Jean-Christophe Helary > > 6 juni 2019 kl. 12.12 skrev Eli Zaretskii : > > > > It isn't hardcoded in Emacs, it' "hardcoded" in the way the OS produces character codes when you type keys on the keyboard. C-[ produces ESC for the same reason C-i produces TAB and C-j produces RET: these keys emit the same codes as the corresponding Ctrl sequences. > > The above is true when Emacs is running in a terminal. Otherwise, Emacs has code to emulate that behaviour (make_ctrl_char), so that we can enjoy a whiff of early 1960s bit-paired keyboards. And this does appear to be hard-coded, in the sense that it cannot be disabled. Why is it useful to have different behavior on GUI and TTY frames?