Fix resize.sh to work in dash.

[fvwmconf.git] / scripts / resize.sh

diff --git a/scripts/resize.sh b/scripts/resize.sh
index a375ddd5f589da97ef66b06ab1404fe73a89d036..65d646c072d2cc24c5a2b26c56230e15f5548809 100755 (executable)
--- a/scripts/resize.sh
+++ b/scripts/resize.sh
@@ -1,36 +1,49 @@
 #!/bin/sh
-# resize.sh mouseX mouseY windowW windowH
+#
+# Copyright © 2008, 2015 Nick Bowler
+#
 # Emits an FVWM directed resize command based on the position of the mouse
 # cursor within a window (mouseX, mouseY) and the width and height of the
 # window (windowW, windowH).
+#
+# License WTFPL2: Do What The Fuck You Want To Public License, version 2.
+# This is free software: you are free to do what the fuck you want to.
+# There is NO WARRANTY, to the extent permitted by law.
 
 if [ $# -lt 4 ]; then
-       echo "usage: $0 mouseX mouseY windowW windowH"
+       printf 'usage: %s mouseX mouseY windowW windowH\n' "$0" 1>&2
        exit 1
 fi
 
-echo -n "Resize Direction "
+# The window's area is divided into a 4x4 grid of equally sized rectangles.
+# We return a resize direction depending on which rectangle was clicked,
+# according to the following diagram:
+#
+#            ┏━━━━━━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━━┓
+#            ┃ NorthWest │         North         │ NorthEast ┃
+#            ┠───────────┼───────────┬───────────┼───────────┨
+#            ┃           │ NorthWest │ NorthEast │           ┃
+#            ┃   West    ├───────────┼───────────┤    East   ┃
+#            ┃           │ SouthWest │ SouthEast │           ┃
+#            ┠───────────┼───────────┴───────────┼───────────┨
+#            ┃ SouthWest │         South         │ SouthEast ┃
+#            ┗━━━━━━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━┷━━━━━━━━━━━┛
 
-# Straight directions
-if [ $1 -le $(($3/4)) -a $2 -ge $(($4/3)) -a $2 -le $(($4/3*2)) ]; then
-       echo "West"
-elif [ $1 -ge $(($3/4*3)) -a $2 -ge $(($4/3)) -a $2 -le $(($4/3*2)) ]; then
-       echo "East"
-elif [ $2 -le $(($4/4)) -a $1 -ge $(($3/3)) -a $1 -le $(($3/3*2)) ]; then
-       echo "North"
-elif [ $2 -ge $(($4/4*3)) -a $1 -ge $(($3/3)) -a $1 -le $(($3/3*2)) ]; then
-       echo "South"
-# Quadrants
-elif [ $1 -le $(($3/2)) ]; then
-       if [ $2 -le $(($4/2)) ]; then
-               echo "NorthWest"
-       else
-               echo "SouthWest"
-       fi
-else
-       if [ $2 -le $(($4/2)) ]; then
-               echo "NorthEast"
-       else
-               echo "SouthEast"
-       fi
-fi
+rect_w=$(($3/4))
+rect_h=$(($4/4))
+grid_x=$(($1/$rect_w))
+grid_y=$(($2/$rect_h))
+
+case $grid_x$grid_y in
+11|00) dir=NorthWest ;;
+21|30) dir=NorthEast ;;
+12|03) dir=SouthWest ;;
+22|33) dir=SouthEast ;;
+?0) dir=North ;;
+0?) dir=West ;;
+3?) dir=East ;;
+?3) dir=South ;;
+*) exit 1 ;;
+esac
+
+printf 'Resize Direction %s\n' "$dir"