zsh-users/6736: widget that puts double-quotes around words before

invoking completion.

Functions/Zle/quote-and-complete-word

@@ -0,0 +1,46 @@
+#autoload
+
+# This widget uses the completion system to double-quote the current word
+# if it is not already quoted, then attempts to complete normally.  If the
+# normal completion fails, the quotes are removed again.
+#
+# To use it:
+#   autoload -U quote-and-complete-word
+#   zle -N quote-and-complete-word
+#   bindkey '\t' quote-and-complete-word
+#
+# BUG: The "undo" mechanism is confused by multiple calls to completion
+# widgets from the same normal widget.
+
+# Note: It's important that this function's name ends in "complete-word".
+# The _oldlist completer does nothing unless the widget has that suffix.
+
+quote-and-complete-word () {
+    setopt localoptions unset noshwordsplit noksharrays
+    local lbuf=$LBUFFER rbuf=$RBUFFER last=$LASTWIDGET
+    if [[ $last != $WIDGET ]]
+    then
+        local oldcontext=$curcontext
+        local curcontext="${WIDGET}:${${curcontext:-:::}#*:}"
+        zle complete-word
+        curcontext=$oldcontext
+    fi
+    zle complete-word
+    local ret=$?
+    if [[ _lastcomp[nmatches] -eq 0 && $last != $WIDGET ]]
+    then
+        LBUFFER=$lbuf RBUFFER=$rbuf
+    fi
+    return ret
+}
+
+_force_quote () {
+    [[ -z $compstate[quoting] ]] &&
+    compstate[to_end]='' &&
+    compadd -U -S "$SUFFIX" -I "$ISUFFIX"\" -i \""$IPREFIX" "${(Q)PREFIX}"
+}
+zstyle ':completion:quote-and-complete-word:*' completer _force_quote
+
+# Handle zsh autoloading conventions
+
+[[ -o kshautoload ]] || quote-and-complete-word "$@"