From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-22716-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 16303 invoked by alias); 26 May 2017 14:46:05 -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>
X-Seq: 22716
Received: (qmail 14842 invoked from network); 26 May 2017 14:46:05 -0000
X-Qmail-Scanner-Diagnostics: from mail-it0-f46.google.com by f.primenet.com.au (envelope-from <jahvascriptmaniac@gmail.com>, uid 7791) with qmail-scanner-2.11 
 (clamdscan: 0.99.2/21882. spamassassin: 3.4.1.  
 Clear:RC:0(209.85.214.46):SA:0(0.5/5.0):. 
 Processed in 1.716076 secs); 26 May 2017 14:46:05 -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=0.5 required=5.0 tests=FREEMAIL_FROM,
	RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,RCVD_IN_SORBS_SPAM,
	SPF_PASS,T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.1
X-Envelope-From: jahvascriptmaniac@gmail.com
X-Qmail-Scanner-Mime-Attachments: |
X-Qmail-Scanner-Zip-Files: |
Received-SPF: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.214.46 as permitted sender)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=mime-version:from:date:message-id:subject:to
         :content-transfer-encoding;
        bh=yTM2//6yXd5Apj+561W4DPWlmwSmFnrWU81lvlhq/p0=;
        b=eSlAE9yd+lyCOp/+Sb4xTLwWmKmmjb+rc9OuQZ2deKsNNOO62z6o9HE/Cw29H6jfoR
         HvhrMJRKzszennRrP8nCVg93J0KmKa5pqRVm2RYvbgx/Mb2nZvKKb2AtQ817EPfhWyGa
         gn70vmjtE7AXP1mV1pRgC7Xt77YWKgXWSxhbR38rpmpK43BFU/jaI9HwjZxxoDTNZLSe
         HXj1pDW0ZRD5FoOXalP2Bf06jrwhCoWE+s2DAOFiqFMsqUPDT0rsziZ2dkVqnI5XszAI
         iFtUsHA/izgUxKhw89H8hsugeEhx1Zfp6BjbV9LcTd5WF3NacWXVKwd9oh9gIx8Z6XwI
         oihA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:from:date:message-id:subject:to
         :content-transfer-encoding;
        bh=yTM2//6yXd5Apj+561W4DPWlmwSmFnrWU81lvlhq/p0=;
        b=ZjIymE5bIfkBq1wVFGojdErF9NfQp3lTXNlBRQuEh45Fy6JhHM+QYnJHF8sVr4apCK
         zF5ZgT/sCBB7db4BHc1Aw66JYsRNt2UePthU3HAzh3gmUga/78iNZdZVjxu6kXLrg6pg
         ONXMxg1WQFGjiVvC9ZtCO8nxCXZV16FXxjc1KMb69srbvoERjuH1blq1WtBq41yHgWNw
         yUOVqutNNtaVOErcqxHh2WmdcaxpZr1vYNwbew8mlSarW70zIDFQUyZPheKPiYHCBmPn
         PWDDUIXzlNgMqkeW9naF3BJY28z4w2p20A0r1jB1PawTol71RNARrX5PsoYSTqI9PZrA
         Y4aA==
X-Gm-Message-State: AODbwcCvQuu6NlBIRc2jOW+huFfYIGhtuc4v4jPinHOnozA9XdA9Q2j1
	ZNwWHVoKx5s0niKcgz7JCvp7KYfBYQ==
X-Received: by 10.36.242.133 with SMTP id j127mr3046539ith.67.1495809959958;
 Fri, 26 May 2017 07:45:59 -0700 (PDT)
MIME-Version: 1.0
From: =?UTF-8?Q?Dup=C3=A9ron_Georges?= <jahvascriptmaniac@gmail.com>
Date: Fri, 26 May 2017 16:45:39 +0200
Message-ID: <CAKQnwqadKiW_UTJPzERKzE=EEpEggSjq3cG8EHNKyznC5V1WHA@mail.gmail.com>
Subject: How to call zle -U while drawing the prompt?
To: zsh-users@zsh.org
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hello!

I am trying to get the current cursor position (in lines and columns
w.r.t. the top left corner of the console) while drawing the ZSH
prompt. My actual goal is to display more or less verbose information
below the "actual" prompt line depending on how much space is
available.

In order to know the current cursor position, I need to send the
escape sequence \e[6n to the terminal, and it replies with \e[Y;XR .

If the user typed some input before the cursor position is read (e.g.
during the "sleep 1" in the example below, or while .zshrc is
initially running when opening a new terminal), then these characters
are discarded.

I tried to re-add these characters to ZSH's input buffer by calling
zle -U "$userinput", but I get the error "can only be called from
widget function".

How can I:

* Call zle -U while drawing the prompt?
* Or otherwise force zsh to either read all input just before I send
    \e[6n to the terminal?

Thanks!
Georges Dup=C3=A9ron

# This is the short .zshrc I use:
setopt prompt_subst
MY_PS1(){
  local stuff line userinput

  # simulate some work:
  sleep 1

  # request the cursor position
  echo -ne "\033[6n" > /dev/tty
  read -s -d 'R' stuff < /dev/tty
  line=3D"${stuff##*\[}"
  line=3D"${line%;*}"
  userinput=3D"${stuff%\[*}"

  # re-inject the already-typed text
  zle -U "$userinput"

  echo "prompt:"
}
PS1=3D'`MY_PS1`'