[qfp] Add highlight command plugin

plugins/highlight-command/highlight-command.plugin.zsh

@@ -0,0 +1,6 @@
+_load_highlight_command() {
+  source $1/highlight-command.sh
+}
+
+[[ -f $ZSH_CUSTOM/plugins/highlight-command/highlight-command.plugin.zsh ]] && _load_highlight_command $ZSH_CUSTOM/plugins/highlight-command
+[[ -f $ZSH/plugins/highlight-command/highlight-command.plugin.zsh ]] && _load_highlight_command $ZSH/plugins/highlight-command

plugins/highlight-command/highlight-command.sh

@@ -0,0 +1,34 @@
+
+setopt extended_glob
+ TOKENS_FOLLOWED_BY_COMMANDS=('|' '||' ';' '&' '&&' 'sudo' 'do' 'time' 'strace')
+
+ recolor-cmd() {
+     region_highlight=()
+     colorize=true
+     start_pos=0
+     for arg in ${(z)BUFFER}; do
+         ((start_pos+=${#BUFFER[$start_pos+1,-1]}-${#${BUFFER[$start_pos+1,-1]## #}}))
+         ((end_pos=$start_pos+${#arg}))
+         if $colorize; then
+             colorize=false
+             res=$(LC_ALL=C builtin type $arg 2>/dev/null)
+             case $res in
+                 *'reserved word'*)   style="fg=magenta,bold";;
+                 *'alias for'*)       style="fg=cyan,bold";;
+                 *'shell builtin'*)   style="fg=yellow,bold";;
+                 *'shell function'*)  style='fg=green,bold';;
+                 *"$arg is"*)
+                     [[ $arg = 'sudo' ]] && style="fg=red,bold" || style="fg=blue,bold";;
+                 *)                   style='none,bold';;
+             esac
+             region_highlight+=("$start_pos $end_pos $style")
+         fi
+         [[ ${${TOKENS_FOLLOWED_BY_COMMANDS[(r)${arg//|/\|}]}:+yes} = 'yes' ]] && colorize=true
+         start_pos=$end_pos
+     done
+ }
+check-cmd-self-insert() { zle .self-insert && recolor-cmd }
+check-cmd-backward-delete-char() { zle .backward-delete-char && recolor-cmd }
+
+zle -N self-insert check-cmd-self-insert
+zle -N backward-delete-char check-cmd-backward-delete-char