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emulate -L zsh
setopt extendedglob
autoload read-from-minibuffer
local p1="Replace: " p2=" with: "
local REPLY MATCH MBEGIN MEND curwidget=$WIDGET previous
local -a match mbegin mend
if (( ${+NUMERIC} )); then
(( $NUMERIC > 0 )) && previous=1
else
zstyle -t ":zle:$WIDGET" edit-previous && previous=1
fi
read-from-minibuffer $p1 ${previous:+$_replace_string_src} || return 1
_replace_string_src=$REPLY
read-from-minibuffer "$p1$_replace_string_src$p2" \
${previous:+$_replace_string_rep} || return 1
_replace_string_rep=$REPLY
if [[ $curwidget = *pattern* ]]; then
local rep2
# The following horror is so that an & preceded by an even
# number of backslashes is active, without stripping backslashes,
# while preceded by an odd number of backslashes is inactive,
# with one backslash being stripped. A similar logic applies
# to \digit.
local rep=$_replace_string_rep
while [[ $rep = (#b)([^\\]#)(\\\\)#(\\|)(\&|\\<->|\\\{<->\})(*) ]]; do
if [[ -n $match[3] ]]; then
# Expression is quoted, strip quotes
rep2="${match[1]}${match[2]}${match[4]}"
else
rep2+="${match[1]}${match[2]}"
if [[ $match[4] = \& ]]; then
rep2+='${MATCH}'
elif [[ $match[4] = \\\{* ]]; then
rep2+='${match['${match[4][3,-2]}']}'
else
rep2+='${match['${match[4][2,-1]}']}'
fi
fi
rep=${match[5]}
done
rep2+=$rep
LBUFFER=${LBUFFER//(#bm)$~_replace_string_src/${(e)rep2}}
RBUFFER=${RBUFFER//(#bm)$~_replace_string_src/${(e)rep2}}
else
LBUFFER=${LBUFFER//$_replace_string_src/$_replace_string_rep}
RBUFFER=${RBUFFER//$_replace_string_src/$_replace_string_rep}
fi
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