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|
##
## zsh prompt themes extension
## by Adam Spiers <adam@spiers.net>
##
## Load with `autoload -Uz promptinit; promptinit'.
## Type `prompt -h' for help.
##
typeset -gaU prompt_themes
typeset -ga prompt_theme
typeset -g prompt_newline
prompt_themes=()
promptinit () {
emulate -L zsh
setopt extendedglob
local ppath='' name theme
local -a match mbegin mend
# Autoload all prompt_*_setup functions in fpath
for theme in $^fpath/prompt_*_setup(N); do
if [[ $theme == */prompt_(#b)(*)_setup ]]; then
name="$match[1]"
if [[ -r "$theme" ]]; then
prompt_themes=($prompt_themes $name)
autoload -Uz prompt_${name}_setup
else
print "Couldn't read file $theme containing theme $name."
fi
else
print "Eh? Mismatch between glob patterns in promptinit."
fi
done
# To manipulate precmd and preexec hooks...
autoload -Uz add-zsh-hook
# Variables common to all prompt styles
prompt_newline=$'\n%{\r%}'
}
prompt_preview_safely() {
emulate -L zsh
print -P "%b%f%k"
if [[ -z "$prompt_themes[(r)$1]" ]]; then
print "Unknown theme: $1"
return
fi
# This handles all the stuff from the default :prompt-theme cleanup
local +h PS1=$PS1 PS2=$PS2 PS3=$PS3 PS4=$PS4 RPS1=$RPS1 RPS2=$RPS2
local +h PROMPT=$PROMPT RPROMPT=$RPOMPT RPROMPT2=$RPROMPT2 PSVAR=$PSVAR
local -a precmd_functions preexec_functions prompt_preview_cleanup
local -aLl +h zle_highlight
{
# Save and clear current restore-point if any
zstyle -g prompt_preview_cleanup :prompt-theme cleanup
{
zstyle -d :prompt-theme cleanup
# The next line is a bit ugly. It (perhaps unnecessarily)
# runs the prompt theme setup function to ensure that if
# the theme has a _preview function that it's been autoloaded.
prompt_${1}_setup
if typeset +f prompt_${1}_preview >&/dev/null; then
prompt_${1}_preview "$@[2,-1]"
else
prompt_preview_theme "$@"
fi
} always {
# Run any theme-specific cleanup, then reset restore point
zstyle -t :prompt-theme cleanup
}
} always {
(( $#prompt_preview_cleanup )) &&
zstyle -e :prompt-theme cleanup "${prompt_preview_cleanup[@]}"
}
}
set_prompt() {
emulate -L zsh
local opt preview theme usage old_theme
usage='Usage: prompt <options>
Options:
-c Show currently selected theme and parameters
-l List currently available prompt themes
-p [<themes>] Preview given themes (defaults to all)
-h [<theme>] Display help (for given theme)
-s <theme> Set and save theme
<theme> Switch to new theme immediately (changes not saved)
Use prompt -h <theme> for help on specific themes.'
getopts "chlps:" opt
case "$opt" in
(h|p)
setopt localtraps
if [[ -z "$prompt_theme[1]" ]]; then
# Not using a prompt theme; save settings
local +h PS1=$PS1 PS2=$PS2 PS3=$PS3 PS4=$PS4 RPS1=$RPS1 RPS2=$RPS2
local +h PROMPT=$PROMPT RPROMPT=$RPOMPT RPROMPT2=$RPROMPT2 PSVAR=$PSVAR
local -a precmd_functions preexec_functions
else
trap 'prompt_${prompt_theme[1]}_setup "${(@)prompt_theme[2,-1]}"' 0
fi
;;
esac
case "$opt" in
c) if [[ -n $prompt_theme ]]; then
print -n "Current prompt theme"
(( $#prompt_theme > 1 )) && print -n " with parameters"
print " is:\n $prompt_theme"
else
print "Current prompt is not a theme."
fi
return
;;
h) if [[ -n "$2" && -n $prompt_themes[(r)$2] ]]; then
if functions prompt_$2_setup >/dev/null; then
# The next line is a bit ugly. It (perhaps unnecessarily)
# runs the prompt theme setup function to ensure that if
# the theme has a _help function that it's been autoloaded.
prompt_$2_setup
fi
if functions prompt_$2_help >/dev/null; then
print "Help for $2 theme:\n"
prompt_$2_help
else
print "No help available for $2 theme."
fi
print "\nType \`prompt -p $2' to preview the theme, \`prompt $2'"
print "to try it out, and \`prompt -s $2' to use it in future sessions."
else
print "$usage"
fi
;;
l) print Currently available prompt themes:
print $prompt_themes
return
;;
p) preview=( $prompt_themes )
(( $#* > 1 )) && preview=( "$@[2,-1]" )
for theme in $preview; do
[[ "$theme" == "$prompt_theme[*]" ]] && continue
prompt_preview_safely "$=theme"
done
print -P "%b%f%k"
;;
s) print "Set and save not yet implemented. Please ensure your ~/.zshrc"
print "contains something similar to the following:\n"
print " autoload -Uz promptinit"
print " promptinit"
print " prompt $*[2,-1]"
shift
;&
*) if [[ "$1" == 'random' ]]; then
local random_themes
if (( $#* == 1 )); then
random_themes=( $prompt_themes )
else
random_themes=( "$@[2,-1]" )
fi
local i=$(( ( $RANDOM % $#random_themes ) + 1 ))
argv=( "${=random_themes[$i]}" )
fi
if [[ -z "$1" || -z $prompt_themes[(r)$1] ]]; then
print "$usage"
return
fi
# Reset some commonly altered bits to the default
local hook
for hook in chpwd precmd preexec periodic zshaddhistory zshexit; do
add-zsh-hook -D "${hook}" "prompt_*_${hook}"
done
typeset -ga zle_highlight=( ${zle_highlight:#default:*} )
(( ${#zle_highlight} )) || unset zle_highlight
prompt_$1_setup "$@[2,-1]" && prompt_theme=( "$@" )
;;
esac
}
prompt_cleanup () {
local -a cleanup_hooks
if zstyle -g cleanup_hooks :prompt-theme cleanup
then
cleanup_hooks+=(';' "$@")
zstyle -e :prompt-theme cleanup "${cleanup_hooks[@]}"
elif (( $+prompt_preview_cleanup == 0 ))
then
print -u2 "prompt_cleanup: no prompt theme active"
return 1
fi
}
prompt () {
local -a prompt_opts theme_active
zstyle -g theme_active :prompt-theme cleanup || {
# This is done here rather than in set_prompt so that it
# is safe and sane for set_prompt to setopt localoptions,
# which will be cleared before we arrive back here again.
# This is also why we pass around the prompt_opts array.
[[ -o promptbang ]] && prompt_opts+=(bang)
[[ -o promptcr ]] && prompt_opts+=(cr)
[[ -o promptpercent ]] && prompt_opts+=(percent)
[[ -o promptsp ]] && prompt_opts+=(sp)
[[ -o promptsubst ]] && prompt_opts+=(subst)
zstyle -e :prompt-theme cleanup \
'zstyle -d :prompt-theme cleanup;' \
'prompt_default_setup;' \
${PS1+PS1="${(q)PS1}"} \
${PS2+PS2="${(q)PS2}"} \
${PS3+PS3="${(q)PS3}"} \
${PS4+PS4="${(q)PS4}"} \
${RPS1+RPS1="${(q)RPS1}"} \
${RPS2+RPS2="${(q)RPS2}"} \
${RPROMPT+RPROMPT="${(q)RPROMPT}"} \
${RPROMPT2+RPROMPT2="${(q)RPROMPT2}"} \
${PSVAR+PSVAR="${(q)PSVAR}"} \
"precmd_functions=(${(q)precmd_functions[@]})" \
"preexec_functions=(${(q)preexec_functions[@]})" \
"prompt_opts=( ${prompt_opts[*]} )" \
'reply=(yes)'
}
set_prompt "$@"
(( ${#prompt_opts} )) &&
setopt noprompt{bang,cr,percent,sp,subst} "prompt${^prompt_opts[@]}"
true
}
prompt_preview_theme () {
emulate -L zsh
# Check for proper state handling
(( $+prompt_preview_cleanup )) || {
prompt_preview_safely "$@"
return
}
# Minimal preview for prompts that don't supply one
local -a prompt_opts
print -n "$1 theme"
(( $#* > 1 )) && print -n " with parameters \`$*[2,-1]'"
print ":"
prompt_${1}_setup "$@[2,-1]"
(( ${#prompt_opts} )) &&
setopt noprompt{bang,cr,percent,sp,subst} "prompt${^prompt_opts[@]}"
[[ -n ${precmd_functions[(r)prompt_${1}_precmd]} ]] &&
prompt_${1}_precmd
[[ -o promptcr ]] && print -n $'\r'; :
print -P "${PS1}command arg1 arg2 ... argn"
[[ -n ${preexec_functions[(r)prompt_${1}_preexec]} ]] &&
prompt_${1}_preexec
}
[[ -o kshautoload ]] || promptinit "$@"
|
