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|
zmodload -i zsh/parameter || return 1
prompt_bart_help () {
setopt localoptions nocshnullcmd noshnullcmd
[[ $ZSH_VERSION < 3.1.6-dev-20 ]] &&
print 'Requires 3.1.6-dev-19 plus zsh-workers/10168.'$'\n'
<<-\EOF
This prompt gives the effect of left and right prompts on the upper
line of a two-line prompt. It also illustrates including history
text in the prompt. The lower line is initialized from the last
(or only) line of whatever prompt was previously in effect.
prompt bart [on|off] [color...]
You may provide up to five colors, though only three colors (red,
blue, and the default foreground) are used if no arguments are
given. The defaults look best on a light background.
The "off" token temporarily disables the theme; "on" restores it.
EOF
[[ $(read -Ek 1 "?${(%):-%S[press return]%s}") == [Qq] ]] &&
print -nP '\r%E' && return
<<-\EOF
The "upper left prompt" looks like:
machine [last command] /current/working/dir
The first three color arguments apply to these components. The
last command is shown in standout mode if the exit status was
nonzero, or underlined if the job was stopped.
The "upper right prompt" looks like:
date time
The fourth color is used for the date, and the first again for the
time. As with RPS1, first the date and then the time disappear as
the upper left prompt grows too wide. The clock is not live; it
changes only after each command, as does the rest of the prompt.
EOF
[[ $(read -Ek 1 "?${(%):-%S[press return]%s}") == [Qq] ]] &&
print -nP '\r%E' && return
<<-\EOF
When RPS1 (RPROMPT) is set before this prompt is selected and a
fifth color is specified, that color is turned on before RPS1 is
displayed and reset after it. Other color changes within RPS1, if
any, remain in effect.
This prompt hijacks psvar[8] and psvar[9] to avoid having to reset
the entire PS1 string on every command. It uses TRAPWINCH to set
the position of the upper right prompt on a window resize, so the
prompt may not match the window width until the next command. No
background colors or hardwired cursor motion escapes are used, and
it is not necessary to setopt promptsubst.
EOF
}
prompt_bart_precmd () {
setopt localoptions noxtrace extendedglob noksharrays
# Using psvar here protects against unwanted promptsubst expansions.
psvar[8]="$history[$[${(%):-%h}-1]]" # Use history text, not just number
psvar[9]='' # Padding before upper right prompt
repeat $[COLUMNS-${#${(%%f)${PS1//[%]\{[^%]#%\}/}}[1]}-1]
do
psvar[9]="$psvar[9] "
done
}
prompt_bart_ps1 () {
local -ah ps1
local -h host hist dir space date time rs="%{$reset_color%}"
local -h eon="%(?.[.%20(?.[%U.%S[))" eoff="%(?.].%20(?.%u].]%s))"
# Set up the components of the upper line
host="%{$fg[%m]%}%m$rs"
hist="%{$fg[%h]%}$eon%8v$eoff$rs"
dir="%{$fg[%~]%}%~$rs"
space=%9v
date="%{$fg[%D]%}%D$rs" # Prefer "%{$fg[%D]%}%W$rs" in the USA?
time="%{$fg[%@]%}%@$rs"
# This is just a tad silly ...
[[ $prompt_theme[1] = oliver ]] && PS1='[%h%0(?..:%?)]%# ' ||
PS1=${PS1//$prompt_newline/$'\n'}
# Assemble the new prompt
ps1=( ${(f)PS1} ) # Split the existing prompt at newlines
ps1=( "%$[COLUMNS-3]>..>" # Begin truncation (upper left prompt)
"$host"
" $hist " # I prefer spaces around this; do you?
"$dir"
"%<<" # End truncation (end upper left prompt)
"$space" # Pad line to upper right position
"%$[COLUMNS-16](l. . $date)"
"%$[COLUMNS-6](l.. $time)"
$'\n'
$ps1[-1] ) # Keep last line of the existing prompt
PS1="${(j::)ps1}"
}
prompt_bart_winch () {
# Delete ourself from TRAPWINCH if not using our precmd insert.
[[ $functions[precmd] = *prompt_bart_precmd* ]] && prompt_bart_ps1 ||
functions[TRAPWINCH]="${functions[TRAPWINCH]//prompt_bart_winch}"
}
prompt_bart_setup () {
# A few extra niceties ...
repeat 1 case "$1:l" in
(off|disable)
functions[precmd]="${functions[precmd]//prompt_bart_precmd}"
functions[TRAPWINCH]="${functions[TRAPWINCH]//prompt_bart_winch}"
[[ $prompt_theme[1] = bart ]] && PS1=${${(f)PS1}[-1]}
return 1
;;
(on|enable)
shift
[[ $prompt_theme[1] = bart ]] && break
;&
(*)
# Abuse the fg assoc to hold our selected colors ...
fg[%m]=$fg[${1:-red}]
fg[%h]=$fg[${2:-blue}]
fg[%~]=$fg[${3:-none}]
fg[%D]=$fg[${4:-none}]
fg[%@]=$fg[${1:-red}]
;;
esac
prompt_bart_ps1
# No RPS1 by default because prompt_off_setup doesn't fix it.
(($#RPS1 && $# > 4)) && RPS1="%{$fg[$5]%}$RPS1%{$reset_color%}"
# Paste our special commands into precmd and TRAPWINCH
functions[precmd]="${functions[precmd]//prompt_*_precmd}
prompt_bart_precmd"
functions[TRAPWINCH]="${functions[TRAPWINCH]//prompt_bart_winch}
prompt_bart_winch"
return 0
}
[[ -o kshautoload ]] || prompt_bart_setup "$@"
|
