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# Back end for replace-string; can be called as a widget to repeat
# the previous replacement. _replace_string_src and _replace_string_rep
# are global.
# When called from replace-string, we need to use the widget
# name passed to decide whether to do pattern matching: the widget
# may since have been overwritten.
local MATCH MBEGIN MEND curwidget=${1:-$WIDGET}
local -a match mbegin mend
if [[ -z $_replace_string_src ]]; then
zle -M "No string to replace."
return 1
fi
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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