window-min-delta

window-min-delta is a compiled Lisp function in `window.el'.

(window-min-delta &optional WINDOW HORIZONTAL IGNORE TRAIL NOUP NODOWN PIXELWISE)

Return number of lines by which WINDOW can be shrunk.
WINDOW must be a valid window and defaults to the selected one.
Return zero if WINDOW cannot be shrunk.

Optional argument HORIZONTAL non-nil means return number of
columns by which WINDOW can be shrunk.

The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument TRAIL restricts the
windows that can be enlarged. If its value is `before', only
windows to the left of or above WINDOW can be enlarged. If it is
`after', only windows to the right of or below WINDOW can be
enlarged.

Optional argument NOUP non-nil means don't go up in the window
tree, but try to enlarge windows within WINDOW's combination
only. Optional argument NODOWN non-nil means don't check whether
WINDOW itself (and its child windows) can be shrunk; check only
whether at least one other window can be enlarged appropriately.

Optional argument PIXELWISE non-nil means return number of pixels
by which WINDOW can be shrunk.