From 5a45671be03119875f1c5b5f9afc7f35315dc4c6 Mon Sep 17 00:00:00 2001
From: Iain Patterson <me@iain.cx>
Date: Fri, 20 Feb 2015 15:37:55 +0000
Subject: [PATCH] Enable a background highlight for the prompt.

When __ps1_background is 1, set the background colour for the prompt
according to the value of PROMPT_BACKGROUND_COLOUR.

Use "prompt show background" or "prompt hide background" to control
__ps1_background and hence the highlighting.
---
 .profile.d/ps1.bashrc | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/.profile.d/ps1.bashrc b/.profile.d/ps1.bashrc
index 528b49d..556a057 100644
--- a/.profile.d/ps1.bashrc
+++ b/.profile.d/ps1.bashrc
@@ -47,6 +47,7 @@
 # SVN: magenta.
 case $(tput colors) in
   256)
+    PROMPT_BACKGROUND_COLOUR="0;48;5;26"
     PROMPT_OK_COLOUR="1;38;5;34"
     PROMPT_FAILED_COLOUR="1;38;5;160"
     ROOT_OK_COLOUR="0"
@@ -57,6 +58,7 @@ case $(tput colors) in
   ;;
 
   88)
+    PROMPT_BACKGROUND_COLOUR="0;48;5;18"
     PROMPT_OK_COLOUR="1;38;5;24"
     PROMPT_FAILED_COLOUR="1;38;5;48"
     ROOT_OK_COLOUR="0"
@@ -67,6 +69,7 @@ case $(tput colors) in
   ;;
 
   *)
+    PROMPT_BACKGROUND_COLOUR="0;44"
     PROMPT_OK_COLOUR="1;32"
     PROMPT_FAILED_COLOUR="1;31"
     ROOT_OK_COLOUR="0"
@@ -81,7 +84,7 @@ function __ps1() {
   # Default __ps1_user to 1.
   [ -z "$__ps1_user" ] && __ps1_user=1
 
-  PS1='\[\033[0m\]$(__ps1_user $? \u@)\[\033[$(__ps1_col $? 2>/dev/null)m\]$(__ps1_user $? \h)\[\033[$(__ps1_colour_escape $? $GIT_COLOUR)m\]$(__ps1_git $? 2>/dev/null)\[\033[0m\]\[\033[$(__ps1_colour_escape $? $P4_COLOUR)m\]$(__ps1_p4 $? 2>/dev/null)\[\033[0m\]\[\033[$(__ps1_colour_escape $? $SVN_COLOUR)m\]$(__ps1_svn $? 2>/dev/null)\[\033[0m\]$(__ps1_ret $? 2>/dev/null)$(__ps1_colon $?)\w\[\033[$(__ps1_root $? 2>/dev/null)m\]\$\[\033[0m\] '
+  PS1='\[\033[$(__ps1_background $?)m\]$(__ps1_user $? \u@)\[\033[$(__ps1_col $? 2>/dev/null)m\]$(__ps1_user $? \h)\[\033[$(__ps1_colour_escape $? $GIT_COLOUR $PROMPT_BACKGROUND_COLOUR)m\]$(__ps1_git $? 2>/dev/null)\[\033[0m\]\[\033[$(__ps1_colour_escape $? $P4_COLOUR $PROMPT_BACKGROUND_COLOUR)m\]$(__ps1_p4 $? 2>/dev/null)\[\033[0m\]\[\033[$(__ps1_colour_escape $? $SVN_COLOUR $PROMPT_BACKGROUND_COLOUR)m\]$(__ps1_svn $? 2>/dev/null)\[\033[$(__ps1_background $?)m\]$(__ps1_ret $? 2>/dev/null)$(__ps1_colon $?)\w\[\033[$(__ps1_root $? 2>/dev/null)m\]\$\[\033[0m\] '
   return 0
 }
 
@@ -90,17 +93,26 @@ function __ps1_colour_escape() {
   local ret=$1; shift
   local bold="${1%%;*}"
   local colour="${1#*;}"
+  local bgcolour="${2#*;}"
 
   echo -en "${bold}m\033[$colour"
+  [ "$__ps1_background" = 1 ] && echo -en "m\033[$bgcolour"
+  return $ret
+}
+
+function __ps1_background() {
+  local ret=$1; shift
+  echo -n "0"
+  [ "$__ps1_background" = 1 ] && echo -en "m\033[${PROMPT_BACKGROUND_COLOUR}"
   return $ret
 }
 
 function __ps1_col() {
   local ret=$1; shift
   if [ $ret -gt 0 ]; then
-    __ps1_colour_escape $ret "$PROMPT_FAILED_COLOUR"
+    __ps1_colour_escape $ret "$PROMPT_FAILED_COLOUR" "$PROMPT_BACKGROUND_COLOUR"
   else
-    __ps1_colour_escape $ret "$PROMPT_OK_COLOUR"
+    __ps1_colour_escape $ret "$PROMPT_OK_COLOUR" "$PROMPT_BACKGROUND_COLOUR"
   fi
   return $ret
 }
@@ -108,9 +120,9 @@ function __ps1_col() {
 function __ps1_root() {
   local ret=$1; shift
   if [ $ret -gt 0 ]; then
-    __ps1_colour_escape $ret "$ROOT_FAILED_COLOUR"
+    __ps1_colour_escape $ret "$ROOT_FAILED_COLOUR" "$PROMPT_BACKGROUND_COLOUR"
   else
-    __ps1_colour_escape $ret "$ROOT_OK_COLOUR"
+    __ps1_colour_escape $ret "$ROOT_OK_COLOUR" "$PROMPT_BACKGROUND_COLOUR"
   fi
   return $ret
 }
-- 
2.20.1