put everything in lib

lib/termsupport.zsh

@@ -0,0 +1,21 @@
+case "$TERM" in
+  xterm*|rxvt*)
+    preexec () {
+      print -Pn "\e]0;%n@%m: $1\a"  # xterm
+    }
+    precmd () {
+      print -Pn "\e]0;%n@%m: %~\a"  # xterm
+    }
+    ;;
+  screen*)
+    preexec () {
+      local CMD=${1[(wr)^(*=*|sudo|ssh|-*)]}
+      echo -ne "\ek$CMD\e\\"
+      print -Pn "\e]0;%n@%m: $1\a"  # xterm
+    }
+    precmd () {
+      echo -ne "\ekzsh\e\\"
+      print -Pn "\e]0;%n@%m: %~\a"  # xterm
+    }
+    ;;
+esac