window

type API interface {

	// ActiveWindowTitle returns the currently active window's title.
	ActiveWindowTitle() string

	// DetectWindowTitleChanges blocks and starts detecting changes in window
	// titles. When a change is detected, the onChange function is called and
	// when a non-fatal error occurs the onError function is called for that
	// error.
	DetectWindowTitleChanges(onChange func(), onError func(error)) error
}

type X11 struct {
	// This is the underlying X11 connection.
	XConnection *xgb.Conn

	// This is the root window.
	RootWindow xproto.Window

	// The value of this atom should be the currently active window identifier.
	// NOTE: Sometimes there is no currently active window.
	ActiveWindowAtom xproto.Atom

	// This is the canonical window title atom. When the value for it is
	// retrieved, it should always return the current real window title.
	WindowNameAtom xproto.Atom

	// This is a common window title atom. Any changes that occur for it may
	// indicate the title has been updated.
	WindowName2Atom xproto.Atom

	// This is another common window title atom. Any changes that occur for it
	// may indicate the title has been updated.
	WindowName3Atom xproto.Atom
}