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# Autoload this function, run `zle -N <func-name>' and bind <func-name>
# to a key.
# This allows incremental completion of a word. After starting this
# command, a list of completion choices can be shown after every character
# you type, which you can delete with ^h or DEL. RET will accept the
# completion so far. You can hit TAB to do normal completion, ^g to
# abort back to the state when you started, and ^d to list the matches.
#
# This works only with the new function based completion system.
# The main widget function.
incremental-complete-word() {
#emulate -L zsh
unsetopt autolist menucomplete automenu # doesn't work well
local key lbuf="$LBUFFER" rbuf="$RBUFFER" pmpt pstr word
local lastl lastr wid twid num alt post toolong
local curcontext="${curcontext}:incremental" stop brk
zstyle -s ":completion${curcontext}" prompt pmpt ||
pmpt='incremental (%c): %u%s %l'
zstyle -s ":completion${curcontext}" stop stop
zstyle -s ":completion${curcontext}" break brk
if zstyle -t ":completion${curcontext}" list; then
wid=list-choices
post=( icw-list-helper )
else
wid=complete-word
post=()
fi
comppostfuncs=( "$post[@]" )
zle $wid "$@"
LBUFFER="$lbuf"
RBUFFER="$rbuf"
num=$_lastcomp[nmatches]
if (( ! num )); then
num="${_lastcomp[alternate_nmatches]}"
alt=' -alt-'
fi
if (( ! num )); then
word=''
state='-no match-'
elif [[ "${LBUFFER}${RBUFFER}" = *${_lastcomp[unambiguous]}* ]]; then
word=''
state='-no prefix-'
else
word="${_lastcomp[unambiguous]}"
state=''
fi
zformat -f pstr "$pmpt" "u:${word}" "s:$state" "n:$num" "a:$alt" \
"l:$toolong" "c:${_lastcomp[completer][2,-1]}"
zle -R "$pstr"
read -k key
while [[ '#key' -ne '#\\r' && '#key' -ne '#\\n' &&
'#key' -ne '#\\C-g' ]]; do
twid=$wid
if [[ "$key" = ${~stop} ]]; then
zle -U "$key"
return
elif [[ "$key" = ${~brk} ]]; then
return
elif [[ '#key' -eq '#\\C-h' || '#key' -eq '#\\C-?' ]]; then
[[ $#LBUFFER -gt $#l ]] && LBUFFER="$LBUFFER[1,-2]"
elif [[ '#key' -eq '#\\t' ]]; then
zle complete-word "$@"
lbuf="$LBUFFER"
rbuf="$RBUFFER"
elif [[ '#key' -eq '#\\C-d' ]]; then
twid=list-choices
else
LBUFFER="$LBUFFER$key"
fi
lastl="$LBUFFER"
lastr="$RBUFFER"
[[ "$twid" = "$wid" ]] && comppostfuncs=( "$post[@]" )
toolong=''
zle $twid "$@"
LBUFFER="$lastl"
RBUFFER="$lastr"
num=$_lastcomp[nmatches]
if (( ! num )); then
num="${_lastcomp[alternate_nmatches]}"
alt=' -alt-'
else
alt=''
fi
if (( ! num )); then
word=''
state='-no match-'
elif [[ "${LBUFFER}${RBUFFER}" = *${_lastcomp[unambiguous]}* ]]; then
word=''
state='-no prefix-'
else
word="${_lastcomp[unambiguous]}"
state=''
fi
zformat -f pstr "$pmpt" "u:${word}" "s:$state" "n:$num" "a:$alt" \
"l:$toolong" "c:${_lastcomp[completer][2,-1]}"
zle -R "$pstr"
read -k key
done
if [[ '#key' -eq '#\\C-g' ]]; then
LBUFFER="$lbuf"
RBUFFER="$rbuf"
fi
zle -Rc
}
# Helper function used as a completion post-function used to make sure that
# the list of matches in only shown if it fits on the screen.
icw-list-helper() {
# +1 for the status line we will add...
if [[ compstate[list_lines]+BUFFERLINES+1 -gt LINES ]]; then
compstate[list]='list explanations'
if [[ compstate[list_lines]+BUFFERLINES+1 -gt LINES ]]; then
compstate[list]=''
compstate[force_list]=yes
fi
toolong='...'
fi
}
incremental-complete-word "$@"
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