From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.4 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, T_SCC_BODY_TEXT_LINE,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 21527 invoked from network); 14 Aug 2022 22:52:26 -0000 Received: from zero.zsh.org (2a02:898:31:0:48:4558:7a:7368) by inbox.vuxu.org with ESMTPUTF8; 14 Aug 2022 22:52:26 -0000 ARC-Seal: i=1; cv=none; a=rsa-sha256; d=zsh.org; s=rsa-20210803; t=1660517546; b=ngvSjov8L8B0Tkj24KDiTDUNJMZQpEjBmIVyvG9zPciCviz2QWDAWXc8ZNXpCkqmD7hxxVeclH 1DQyDH3b09fCcpZqN887IFgJpX1tygmk4ZJPYg9DM8FVnOkDz1CI9evIBAtpfWHZKwE97wtDl2 P3j2m9bmLNDbmuu3QXJ0ORYW+Pxe+CkPwdpZULDS4LBhYpDoQYMJFdUOx75qnWVgtjmDaMVjyp bToZUw1Mum0XUS6vzZ4F//R9gn12js97M545AQHtTmnNk1chozxZu8KWckgTkS6CGdQeq7aIow D0FU9bvP8IWqOWzmu7K83K3EwTzOInBt5cMgfq8HFWJ3Ew==; ARC-Authentication-Results: i=1; zsh.org; iprev=pass (mail-ed1-f51.google.com) smtp.remote-ip=209.85.208.51; dkim=pass header.d=gmail.com header.s=20210112 header.a=rsa-sha256; dmarc=pass header.from=gmail.com; arc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed; d=zsh.org; s=rsa-20210803; t=1660517546; bh=sF6cQ6GMM0bePTbn7XoLooCCITQM3P9OoGHchoLOoCM=; h=List-Archive:List-Owner:List-Post:List-Unsubscribe:List-Subscribe:List-Help: List-Id:Sender:Content-Type:Cc:To:Subject:Message-ID:Date:From:In-Reply-To: References:MIME-Version:DKIM-Signature:DKIM-Signature; b=Mi6jfSvT1UEb83C/908oGPztCZYKG9Bk4CwZECcYupt3BpC8VGaV9dkN8chcaVHdIplUAIpgkG fFqLB0vXkHwhggat6LP9qClzB52hDEHb9TvwK9YKR1Gy0V5IAmrgTXD3/dYoJ34oB3kKrrGqmh NHxNe00SOssmhhHmefPE9hmE6zpOGfEj0l3MVNtv45+E9AMh+Pw8Ob4VhTvyOTONX/DHf2PF5U aIiy+RP26b1Q8EL2a+k7A7k22UJb5zDSK9580IEDZ4r5s/A23gLTBaq2pJRJdVvqZZyuwmrAlw UbaWVpncyJlDMV3/XS42JIjD9C7qI24ZhKOB6B8gVXVC9Q==; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zsh.org; s=rsa-20210803; h=List-Archive:List-Owner:List-Post:List-Unsubscribe: List-Subscribe:List-Help:List-Id:Sender:Content-Type:Cc:To:Subject:Message-ID :Date:From:In-Reply-To:References:MIME-Version:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID; bh=TbJ805ETv4ONB/4n5m8mYQQFQgPVLu7TgJ5iyUADuR0=; b=auhYp7mpwZSYgivyl8mo+K0/Fs 5uGqDZ1Oe1vB54LwQ8S31dQg0I4blGjXR7dV8vLwpRaDlHgtX3YqfEx6N+tWxazVRJEgwckn5eSGj 6MiyZWVlKcNWHu/IYEpmTm2wL1euazo6JXwtZkW3vWDGHD9+/ucBvenMiMxOAlrHLSMSV7iPqWvkx CZbolfZyJa3DwVPTzev7RCCOy3c6BvcLlctT80plAOqIQ6Uu9vbQb0qE0CAnHjpW34uzC+Nehw5at o4kQyLS5b1q9bFviG+AnisFc1xr9THQmfZJee6h3j4P+0aC/yAeC6rvngsN7B6Ii247x5uvG9XxJa Z+6aV8Qw==; Received: from authenticated user by zero.zsh.org with local id 1oNMT3-000OVo-8q; Sun, 14 Aug 2022 22:52:25 +0000 Authentication-Results: zsh.org; iprev=pass (mail-ed1-f51.google.com) smtp.remote-ip=209.85.208.51; dkim=pass header.d=gmail.com header.s=20210112 header.a=rsa-sha256; dmarc=pass header.from=gmail.com; arc=none Received: from mail-ed1-f51.google.com ([209.85.208.51]:36670) by zero.zsh.org with esmtps (TLS1.3:TLS_AES_128_GCM_SHA256:128) id 1oNMNt-000O3b-Nn; Sun, 14 Aug 2022 22:47:06 +0000 Received: by mail-ed1-f51.google.com with SMTP id x21so7632306edd.3 for ; Sun, 14 Aug 2022 15:47:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc; bh=TbJ805ETv4ONB/4n5m8mYQQFQgPVLu7TgJ5iyUADuR0=; b=hRCYsw+gE1ZCWsP5UzPJhmKP6ZPpWv8MKJwuSmgDHHjLpcc2QFAT/CW2UUlyoFw6X/ 2WR++4xhhXjtf+3phSU/9e3XU10GYMMPd1ObqVOMK+SUIFQyOXiVAS6B18CLtuKTIeS5 M11NwuKU2dZRyXbn86vJYUkOu7782E1CE2ZKE/fqWhXO5wEFduvLVSyNJaTu9ZjzfkbL 3cXegh6p0pyH4kUo+1cbitOeT9SRa0mcQbA1o/GGneGyeIvNFd14vqkkp4BZ1zfwQBfF ux7YRqHh6yTBbi/7tjHB6N3NM9YJXpxJ64cAyN1wY76+RDK7YEloR+tC6pmLVit82tHd VmhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc; bh=TbJ805ETv4ONB/4n5m8mYQQFQgPVLu7TgJ5iyUADuR0=; b=OPa9a6D0DSBxW9nCCXbI2mIyXg0Qj6xoiNDvp5KYrm5HQ1tsXK8j5HmzYcIbDv/M/7 7USY3PGsWSD4/I4D1EGBWalV3DNzIKCZpXO80Iwk4fLVN+MaU5TcI3ZIjnetCkfh9jzt 7TT3YGCEcpt2AF7v11ZB1I8B61ov5FAYRK345yXp6c5eZSOrmdbCO3qkTrI/XHrjYxmX Nu3wxbFMagWQbewf35EXMZKVtH+D0CEVuZxfvowGIyG7GQF8jWT+aMUiFkGMXYFahGMU bh+eE0ldaFPKMHiU7PGT9OwjMFVCHcP6qvdASmxGVYHVTWmWLaz+PNbvDdj7/KxMVvta f9vw== X-Gm-Message-State: ACgBeo2lYsdgTxdXHwxDEFq5aC6rkL+A+QiCabKXf2XbnLn6xJSNH3UB GvVCfhN9ED1ajb2hfr5JtdQ8GZ5ejmUoxGGJ8VDEFqBmXi0= X-Google-Smtp-Source: AA6agR4C7lhMt4b7CLLCr5pTOW2UEFsu8ho4HTX8h9pUnxdsm8G/SGDbYIuxPsoBQt05w4ieiOeQoP6ajzd5UXxpVfA= X-Received: by 2002:a05:6402:3693:b0:43d:1a40:21fd with SMTP id ej19-20020a056402369300b0043d1a4021fdmr11940082edb.206.1660517225283; Sun, 14 Aug 2022 15:47:05 -0700 (PDT) MIME-Version: 1.0 References: <20220811230901.471640-1-felipe.contreras@gmail.com> In-Reply-To: From: Felipe Contreras Date: Sun, 14 Aug 2022 17:46:54 -0500 Message-ID: Subject: Re: [PATCH v2] prompt: support generic non-visible regions To: Bart Schaefer Cc: zsh-workers@zsh.org Content-Type: text/plain; charset="UTF-8" X-Seq: 50475 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: On Sun, Aug 14, 2022 at 2:57 PM Bart Schaefer wrote: > > On Thu, Aug 11, 2022 at 4:09 PM Felipe Contreras > wrote: > > > > readline uses \001 (start of header) and \002 (start of text) as markers > > to delimit a non-visible character zone, which are necessary to > > calculate the width of a prompt. > > How does one embed a literal ctrl-A or ctrl-B in the prompt? What would that achieve? > I haven't found any readline documentation that explains the use of > "start of header" or "start of text". It's in the code: https://git.savannah.gnu.org/cgit/readline.git/tree/display.c#n340 > I'm also leaning to the opinion that \001 and \002 should only be > recognized when PROMPT_PERCENT is unset. That would defeat the primary purpose of the patch, which is to be able to write prompt helper functions which work in multiple shells. -- Felipe Contreras