on-desk? -- Return #t if WIN is on desk N, else #f.
on-desk-n? -- Returns a function which takes WIN and returns #t if WIN is on desk N, else #f.
on-current-desk? -- Return #t if WIN is on the current desk.
rectangle-overlap? -- Returns #t iff the two specified rectangles overlap.
intersection-area -- Returns the size of the intersection of two rectangles.
in-viewport-any-desk? -- Return #t if WIN is in the current viewport ignoring the desk, else #f.
windows-overlap? -- Return #t if WIN and WIN2 overlap at all, else #f.
window-overlaps-window? -- Return a function that takes WIN2 and returns #t if it overlaps WIN.
list-overlapping-windows -- Return a list of windows that overlap WIN.
list-non-overlapping-windows -- Return a list of windows that do not overlap WIN.
visible? -- Return #t if any of WIN is currently potentially visible, else #f.
percent-visible -- Return the percent of WIN currently in the viewport as a real in [0,100].
window-center-position -- Return the virtual coordinates of the center of WIN as a list of the X and Y coordinate.
window-geometry-string -- Return a string corresponding to the geometry specifications for WIN.
time-t->seconds-ago -- Return the number of seconds that have passed since TIMET was the current time.
window-last-focus-time-string -- Return a string corresponding to the last focus time for WIN.
wildcard->regexp -- Return the regular expresision string corresponding to WILDCARD.
window-client-machine-name -- Return the name of the client machine on which WIN is running.
wildcard-matcher -- Return a procedure that matches WILDCARD against a window.
title-match?? -- Return a predicate that tests a window's title.
class-match?? -- Return a predicate that tests a window's resource class.
resource-match?? -- Return a predicate that tests a window's resource instance.
icon-title-match?? -- Return a predicate that tests a window's icon title.
client-hostname-match?? -- Return a predicate that tests a window's client hostname.
find-window-by -- Return a window satisfying predicate PRED.
find-window-by-name -- Return a window with name WINDOW-NAME.
find-window-by-class-resource -- Return a window by its CLASS and RESOURCE names (as strings).