Re: Read a line from user without clearing screen below the prompt while allowing user to use arrow keys to make edits in middle of line

[OG Code Poet <ogcodepoet@gmail.com>]

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I had tried tput cup $LINES $((COLUMNS-1)) and tput cup $LINES $COLUMNS.
Vared seems to clear the entire line of cursor, not just from
cursor position to the end of line. Not sure if this has something to do
with xterm-256color and tmux-256color, unlike the description of tput el
"clear to end of line". On all the terminals I have tested this on, they
clear from beginning of current line to the end. My machine is: Apple
Silicon macOS 13.1. Did that really work on your machine?

On Fri, Dec 30, 2022 at 9:20 PM Bart Schaefer <schaefer@brasslantern.com>
wrote:

> On Fri, Dec 30, 2022 at 7:52 PM OG Code Poet <ogcodepoet@gmail.com> wrote:
> >
> > Here's some more context.
>
> So ... vared sends the clear-to-end-of-screen before printing the
> prompt, then starts ZLE and clears again after ZLE exits.  This means
> your job, in creating a workaround, is to move the cursor to the lower
> right corner of the screen before calling vared, move it to the
> desired position before printing the prompt, and move back to the
> lower right again before ending ZLE.
>
> This translates approximately to:
>
> to-lower-right() { tput cup $LINES $((COLUMNS-1)) }
> zle -N to-lower-right
> tput sc
> to-lower-right
> vared -f to-lower-right -p "%{$(tput cup 0 0)%}Enter something: " ...
> tput rc
>
> Other tricks may be needed to keep a newline from being output when
> pressing ENTER to accept the edit.
>
> If this is unsatisfactory, you could try using zcurses to manage the
> display, which I think would allow you to always redraw whatever vared
> erased.
>

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