lotsa improvements to markslider

reporting/markslider

@@ -24,7 +24,7 @@ function display_slide {
      !/^# /{
             print $0;
      }
-' "$1" | sed -n '/^'$2'# /,/^'$j'# /p' | grep -v "^$j# "  | sed 's,^'$i'\(# .*\),'$H'\1'$Z',' | eval sed $REGEX 
+' "$1" | sed -n '/^'$2'# /,/^'$j'# /p' | grep -v "^$j# "  | sed -e 's,^'$i'\(# .*\),'$H'\1'$Z',' -e ${HROW}'s/^\(.*\)/'$H$Y'\1'$Z'/' | eval sed $REGEX 
 }
 function slide_exec {
     # find executables in the slide
@@ -94,12 +94,14 @@ REGEX="$REGEX -e 's/^\$(\([^)]\{20\}\).*)/\$(\1...)/g'"
 
 i=1
 MENU=1
+HROW=1
 while true
 do 
     # print slide $i
     NO_SLIDES=$( grep -ce "^# " "$1" )
     SLIDE_CHARS=$(( ${#i} + ${#NO_SLIDES} +1 ))
     COLS=$(( $( tput cols ) - $SLIDE_CHARS ))
+    LINES=$( tput lines )
     [ "$cmd" = "e" ] && read -N 1 foo
     display_slide "$1" $i
     # save cursor location
@@ -119,13 +121,23 @@ do
     [ "$cmd" = "" ] && read -s -N 2 cmd
     
     case "$cmd" in
-        2|"[D")
+        2|"[D"|"[5")
             i=$(( $i - 1 ))
             [ $i -lt 1 ] && i=1
+            HROW=1
         ;;
-        1|"[C"|"")
+        1|"[C"|"[6"|"")
             i=$(( $i + 1 ))
             [ $i -gt $NO_SLIDES ] && i=$NO_SLIDES
+            HROW=1
+        ;;
+        4|"[A")
+            HROW=$(( $HROW - 1 ))
+            [ $HROW -lt 1 ] && HROW=1
+        ;;
+        3|"[B")
+            HROW=$(( $HROW + 1 ))
+            [ $HROW -gt $LINES ] && HROW=$LINES
         ;;
         m)
             [ -z "$MENU" ] && {