mh-window-full-height-p

mh-window-full-height-p is an alias for `window-full-height-p' in `mh-compat.el'.

(mh-window-full-height-p &optional WINDOW)

Return t if WINDOW is as high as its containing frame.
More precisely, return t if and only if the total height of
WINDOW equals the total height of the root window of WINDOW's
frame. WINDOW must be a valid window and defaults to the
selected one.