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From: Dan Bullok <dan@bullok.com>
To: zsh-workers@sunsite.dk
Subject: PATCH:  (one-liner) adjustwinsize doesn't update prompt string
Date: Sat, 6 Aug 2005 12:20:23 -0500
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zsh 4.2.5 does not re-evaluate the prompt string when the window size changes.    
When the window size changes, it seems to me that zle should know about it, 
and redisplay the prompt appropriately.  Most of the two line prompts get 
very screwed up on a window resize, and you have to hit enter for them to 
behave again.

There's another closely related issue that's bugging me, which I don't have a 
fix for.  When the window is resized, zsh keeps moving the prompt down a line 
at a time.  This isn't a big deal, except that it often ends up causing the 
display to scroll up so that I can't see anything but the messed up prompt 
bits on screen.  Is it necessary to do this when the display is updated?  Is 
there a way to prevent it without messing everything else up?  I've looked at 
zrefresh for a couple of hours, but I'm completely confused by it. 
-Dan

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diff -ur zsh-4.2.5.ORIG/Src/utils.c zsh-4.2.5/Src/utils.c
--- zsh-4.2.5.ORIG/Src/utils.c	2005-03-21 12:49:00.000000000 -0600
+++ zsh-4.2.5/Src/utils.c	2005-08-06 07:43:46.000000000 -0500
@@ -1054,7 +1054,7 @@
 	winchanged =
 #endif /* TIOCGWINSZ */
 	    resetneeded = 1;
-	zrefresh();
+	trashzle();
     }
 }
 
Only in zsh-4.2.5/Src: utils.c~

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#!/bin/zsh


prompt_stretchy_setup () {
    PS1="\$(prompt_stretchy_line1)${prompt_newline}-->"
    PS2="---%{$fg_bold[white]%}%_> %{${fg_nobold[white]}%}"
    PS3="%{$fg_bold[white]%}?# %{${fg_nobold[white]}%}"
}

prompt_stretchy_line1 () {
    datestr="[$(date)]"
    local datestrwid=${#datestr}
    local prompt_padding_size=$(( COLUMNS - 1 - datestrwid ))
    local prompt_padding
    if (( prompt_padding_size > 0 )); then
        eval "prompt_padding=\${(l:${prompt_padding_size}::-:)_empty_zz}"
        echo -n "%{${fg_bold[cyan]}%}${prompt_padding}%{${fg_bold[green]}%}$datestr"
        return
    fi
    prompt_padding_size=$(( COLUMNS -1 ))

    # Didn't fit; just return padding
    if (( prompt_padding_size > 0 )); then
        eval "prompt_padding=\${(l:${prompt_padding_size}::-:)_empty_zz}"
        echo -n "%{${fg_bold[cyan]}%}${prompt_padding}"
        return
    fi
    # a terminal with 1 column?  nice...
    echo -n ""

}

prompt_stretchy_preexec () {
    print -n "${reset_color}"
}

prompt_stretchy_setup "$@"


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