variable-width padding

Padding prevents line-wrap during output from coloring the background of
the whole line with the escape character color.  It works by ensuring
line-wrap occurs with color set to defaults.  After printing blank
spaces, backspaces are printed to move cursor back to the starting
point.

1 files changed, 14 insertions, 2 deletions

diff --git a/src/write-tty b/src/write-tty
index 62ff4f4..5de700a 100644
--- a/src/write-tty
+++ b/src/write-tty
@@ -84,14 +84,26 @@ tokenize()
         done
 }
 
+padding()
+{
+        for ((i=0; i<$1; ++i))
+        do
+                echo -n ' '
+        done
+        for ((i=0; i<$1; ++i))
+        do
+                echo -en '\b'
+        done
+}
+
 soft_cursor()
 {
         BASH_ARGV0=soft_cursor
         echo -n "$0" >/proc/$BASHPID/comm
-        FMT=$'%s \b\e[%sm \e[m \b\b'
+        FMT=$'\e[m %s\b%s\e[%sm \b\e[m'
         REPLY=
         color=105
-        while printf "$FMT" "$REPLY" "$color"
+        while printf "$FMT" "$(padding ${#REPLY})" "$REPLY" "$color"
         do
                 read -r || break
         done