47306: edit-command-line: add editor style

Completion/Zsh/Command/_zstyle

@@ -143,6 +143,7 @@ styles=(
   cursor                 e:
   edit-buffer            e:bool
   edit-previous          e:bool
+  editor                 e:
   insert-kept            e:
   leave-cursor           e:bool
   match                  e:

Doc/Zsh/contrib.yo

@@ -2472,6 +2472,12 @@ item(tt(edit-command-line))(
 Edit the command line using your visual editor, as in tt(ksh).
 
 example(bindkey -M vicmd v edit-command-line)
+
+The editor to be used can also be specified using the tt(editor) style in
+the context of the widget. It is specified as an array of command and
+arguments:
+
+example(zstyle :zle:edit-command-line editor gvim -f)
 )
 tindex(expand-absolute-path)
 item(tt(expand-absolute-path))(

Functions/Zle/edit-command-line

@@ -22,8 +22,12 @@ fi
   (( $+zle_bracketed_paste )) && print -r -n - $zle_bracketed_paste[2]
 
   # Open the editor, placing the cursor at the right place if we know how.
-  local editor=( "${(@Q)${(z)${VISUAL:-${EDITOR:-vi}}}}" )
-  case $editor in 
+  local -a editor
+  zstyle -a :zle:$WIDGET editor editor
+  if (( ! $#editor )); then
+    editor=( "${(@Q)${(z)${VISUAL:-${EDITOR:-vi}}}}" )
+  fi
+  case $editor in
     (*vim*)
       integer byteoffset=$(( $#PREBUFFER + $#LBUFFER + 1 ))
       "${(@)editor}" -c "normal! ${byteoffset}go" -- $1;;