From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-23582-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 13464 invoked by alias); 14 Aug 2018 21:51:27 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
List-Unsubscribe: <mailto:zsh-users-unsubscribe@zsh.org>
X-Seq: 23582
Received: (qmail 20218 invoked by uid 1010); 14 Aug 2018 21:51:27 -0000
X-Qmail-Scanner-Diagnostics: from mta04.eastlink.ca by f.primenet.com.au (envelope-from <rayandrews@eastlink.ca>, uid 7791) with qmail-scanner-2.11 
 (clamdscan: 0.99.2/21882. spamassassin: 3.4.1.  
 Clear:RC:0(24.224.136.10):SA:0(-2.6/5.0):. 
 Processed in 3.563842 secs); 14 Aug 2018 21:51:27 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW,
	SPF_PASS autolearn=ham autolearn_force=no version=3.4.1
X-Envelope-From: rayandrews@eastlink.ca
X-Qmail-Scanner-Mime-Attachments: |
X-Qmail-Scanner-Zip-Files: |
MIME-version: 1.0
Content-transfer-encoding: 8BIT
Content-type: text/plain; charset=utf-8; format=flowed
X-Authority-Analysis: v=2.3 cv=R/q35uZX c=1 sm=1 tr=0
 a=RnRVsdTsRxS/hkU0yKjOWA==:117 a=RnRVsdTsRxS/hkU0yKjOWA==:17 a=IkcTkHD0fZMA:10
 a=x7bEGLp0ZPQA:10 a=gir0-LH0AAAA:8 a=vDG3BvN9itEolrkUVxgA:9 a=QEXdDO2ut3YA:10
 a=aLewGyoHDmJ4ULJHWpSz:22
X-EL-IP-NOAUTH: 24.207.101.9
Subject: Re: ticking clock
To: zsh-users@zsh.org
References:
 <CADjGqHu5KYqFWdawfBu6PR5pGyZN_iZSXx690edLO+FtpKfM1A@mail.gmail.com>
 <CAP+y1xB4jzy-8HVEjSU0aX0kpcyAn98TAcm3UGBL0fDUi1+pCw@mail.gmail.com>
 <1534170704.3055908.1472497128.24A0E402@webmail.messagingengine.com>
 <5d1d108b-d65d-9c5b-64fa-017d3a9637a8@eastlink.ca>
 <CACeGjnWxitZunJ3fnz8j1Wb=gxUhjTwM6S7mjXqna0Dr_pecMA@mail.gmail.com>
 <c4247be1-d99c-cdf9-a5a0-fc079a649e1e@eastlink.ca>
 <CAH+w=7Y2x+wAeWmx-wqJjzAUQpNBv1tbnbh4zC=A6bVuTXjamw@mail.gmail.com>
 <84b1dcba-fa72-140e-1733-c31430bf1b41@eastlink.ca>
 <CAH+w=7aAP0Ko+K1fzH7m_4nADXbXJoMeyMaODzah32Q=OhqcDw@mail.gmail.com>
From: Ray Andrews <rayandrews@eastlink.ca>
Message-id: <5c13aae7-ddd8-8f2f-a818-f38dba14150f@eastlink.ca>
Date: Tue, 14 Aug 2018 14:21:15 -0700
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.8.0
In-reply-to:
 <CAH+w=7aAP0Ko+K1fzH7m_4nADXbXJoMeyMaODzah32Q=OhqcDw@mail.gmail.com>
Content-language: en-CA

On 14/08/18 10:27 AM, Bart Schaefer wrote:
> On Mon, Aug 13, 2018 at 3:45 PM, Ray Andrews <rayandrews@eastlink.ca> wrote:
>> So no way to have it tick only when it's idle, and never force a scroll?
> The terminal emulator doesn't "inform" the shell when you scroll back,
> so there's no way for the shell to know that it should stop sending
> output.
Right , so the prompt doesn't even know if it's visible.  And I can see 
that it's no small thing for the shell to try to convince the terminal 
not to detect that it's been written to in some particular situation.
> Some emulators have "scroll to bottom on tty input" as well as (or
> instead of) "on tty output" -- if possible with your emulator, you
> could try enabling only the former.

Sure.  There's little practical difficulty, I'm mostly interested in the 
theory of the thing.  Thanks Bart.


>