Optimize the ys.zsh-theme make it more expressive

themes/ys.zsh-theme

 # Clean, simple, compatible and meaningful.
 # Tested on Linux, Unix and Windows under ANSI colors.
-# It is recommended to use with a dark background and the font Inconsolata.
+# It is recommended to use with a dark background.
 # Colors: black, red, green, yellow, *blue, magenta, cyan, and white.
-# 
-# http://ysmood.org/wp/2013/03/my-ys-terminal-theme/
-# Mar 2013 ys
-
-# Machine name.
-function box_name {
-    [ -f ~/.box-name ] && cat ~/.box-name || echo $HOST
-}
-
-# Directory info.
-local current_dir='${PWD/#$HOME/~}'
+#
+# Mar 2013 Yad Smood
 
 # VCS
 YS_VCS_PROMPT_PREFIX1=" %{$fg[white]%}on%{$reset_color%} "
@@ -21,7 +12,7 @@ YS_VCS_PROMPT_SUFFIX="%{$reset_color%}"
 YS_VCS_PROMPT_DIRTY=" %{$fg[red]%}x"
 YS_VCS_PROMPT_CLEAN=" %{$fg[green]%}o"
 
-# Git info.
+# Git info
 local git_info='$(git_prompt_info)'
 ZSH_THEME_GIT_PROMPT_PREFIX="${YS_VCS_PROMPT_PREFIX1}git${YS_VCS_PROMPT_PREFIX2}"
 ZSH_THEME_GIT_PROMPT_SUFFIX="$YS_VCS_PROMPT_SUFFIX"
@@ -44,29 +35,24 @@ ys_hg_prompt_info() {
 	fi
 }
 
-# Prompt format: \n # USER at MACHINE in DIRECTORY on git:BRANCH STATE [TIME] \n $ 
-PROMPT="
-%{$terminfo[bold]$fg[blue]%}#%{$reset_color%} \
-%{$fg[cyan]%}%n \
-%{$fg[white]%}at \
-%{$fg[green]%}$(box_name) \
-%{$fg[white]%}in \
-%{$terminfo[bold]$fg[yellow]%}${current_dir}%{$reset_color%}\
-${hg_info}\
-${git_info} \
-%{$fg[white]%}[%*]
-%{$terminfo[bold]$fg[red]%}$ %{$reset_color%}"
 
-if [[ "$USER" == "root" ]]; then
+# Prompt format:
+#
+# PRIVILEGES USER @ MACHINE in DIRECTORY on git:BRANCH STATE [TIME] L:SHELL_LEVEL N:LINE_NUM
+# $ COMMAND
+#
+# For example:
+#
+# % ys @ ys-mbp in ~/.oh-my-zsh on git:master x [21:47:42] tty:s000 L:1 N:12
+# $
 PROMPT="
 %{$terminfo[bold]$fg[blue]%}#%{$reset_color%} \
-%{$bg[yellow]%}%{$fg[cyan]%}%n%{$reset_color%} \
-%{$fg[white]%}at \
-%{$fg[green]%}$(box_name) \
+%(#,%{$bg[yellow]%}%{$fg[black]%}%n%{$reset_color%},%{$fg[cyan]%}%n) \
+%{$fg[white]%}@ \
+%{$fg[green]%}%m \
 %{$fg[white]%}in \
-%{$terminfo[bold]$fg[yellow]%}${current_dir}%{$reset_color%}\
+%{$terminfo[bold]$fg[yellow]%}%~%{$reset_color%}\
 ${hg_info}\
 ${git_info} \
-%{$fg[white]%}[%*]
+%{$fg[white]%}[%*] tty:%l L:%L N:%i
 %{$terminfo[bold]$fg[red]%}$ %{$reset_color%}"
-fi