message PanelArea
Control plane
message PanelAreaWhether anything is in the way of a panel.
What it answers is "is the strip I occupy clear of windows right now", which is the whole question an auto-hiding dock has and the only one it cannot answer for itself: a client knows where it is and nothing about what is in front of it.
idl/lava.npidl:544
Fields
covered: booleanTrue when a window on the current workspace overlaps the panel's own rectangle. Minimized windows and other panels do not count — nor does a window on another workspace, which is not on screen to be in the way.
idl/lava.npidl:550