Added option --maximumsize, using pixel-based selection rather than boundary-based so slop can no longer output a size of 0x0 (unless a window is that size and you somehow hover over it), improved render speed for slower laptops.
Added a workaround for being incapable of selecting the bottom right corner of pixels, and added option --minimumsize for those who don't want to accidentally select a 0x0 size selection.
Cleaned up code
Windows are now selected via EnterNotify events
Improved response time on rectangle drawing (no longer creates new rectangles when window selection changes, waits 0.01 seconds between re-drawing for xorg to catch up and display)
Removed offset settings as they seem useless
Added --version option
--nodecorations now doesn't attempt to actively search for the correct subwindow. Now it just allows for selection of subwindows. This should keep slop from crashing/not work properly on weird WMs like openbox, but may make it act a little unexpectedly since you can still click on decorations to include them.
Dalton Nell
Sam Lakerveld