Variable: x-dnd-current-state

The current state for a drop.
This is an alist with one entry for each display. The value for each display
is a vector that contains the state for drag and drop for that display.
Elements in the vector are:
Last buffer drag was in,
last window drag was in,
types available for drop,
the action suggested by the source,
the type we want for the drop,
the action we want for the drop, any protocol specific data.