esc seq in prompt

esc seq in prompt

[Scott Smedley]

Hi,                                                                             
                                                                                
I'm having a small trouble with the command-line completion                     
system when I have escape sequences in my PROMPT environment variable.          
                                                                                
Basically, the cursor jumps to the right of screen (spaces are                  
inserted?) & confuses the hell out of mE when I hit TAB in a                    
directory & get multiple matches.                                               
                                                                                
Below is a copy of the *entire* .zshrc file I'm using to try &                  
debug this. I'd love some help or a pointer to get around this.                 
                                                                                
burns>> echo $ZSH_VERSION                                                       
3.1.9-dev-1                                                                     
burns>> uname -a                                                                
Linux burns 2.2.12-20 #1 Mon Sep 27 10:40:35 EDT 1999 i686 unknown              
                                                                                
=== cut: .zshrc ===                                                             
                                                                                
setPrompt ()                                                                    
{                                                                               
        rv=$?                                                                   
        local red green white errno color1 color2                               
        red=`print -nP '\e[\033[31;;1m'`                                        
        green=`print -nP '\e[\033[32;;1m'`                                      
        white=`print -nP '\e[\033[37;;1m'`                                      
        errno=""                                                                
        if [ $rv = 0 ] ; then                                                   
                color1=$green                                                   
                color2=$green                                                   
        else                                                                    
                color2=$red                                                     
                if [ $rv = 1 ] ; then                                           
                        color1=$green                                           
                else                                                            
                        color1=$red                                             
                        if [ $rv != 2 ] ; then                                  
                                errno="($rv)"                                   
                        fi                                                      
                fi
        fi                                                                      
        export PROMPT=$green$MACHINE$color1$errno">"$color2"> "$white           
}                                                                               
                                                                                
export MACHINE=`uname -n`                                                       
                                                                                
precmd ()                                                                       
{                                                                               
        setPrompt                                                               
}                                                                               
                                                                                
=== end: .zshrc ===                                                             
                                                                                
SCoTT! :)                                                                       
--------------------                                                            
scott@mobinfo.com.au

Re: esc seq in prompt

[Zefram]

Scott Smedley wrote:
>        red=`print -nP '\e[\033[31;;1m'`

	red=$'\e[31m'

etc.  You have the \e[ part doubled, and it's more efficient to use $''.

>        export PROMPT=$green$MACHINE$color1$errno">"$color2"> "$white

	PROMPT="%{$green%}$MACHINE%{$color1%}$errno>%{$color2%}> %{$white%}"

%{ and %} must surround all parts of the prompt that don't affect the
cursor position.  Otherwise zsh has no idea how much space the prompt
will take up on the screen.

This is addressed in the FAQ, question 3.25.

-zefram