// Finalizer method, only to be called from Release or by
// the Go runtime
func (e *Element) finalize() {
// Detach handlers
if attachedHandlers, hasHandlers := eventHandlers[e.handle]; hasHandlers {
for handler := range attachedHandlers {
tag := uintptr(unsafe.Pointer(handler))
C.HTMLayoutDetachEventHandler(e.handle, (*[0]byte)(unsafe.Pointer(goElementProc)), C.LPVOID(tag))
}
delete(eventHandlers, e.handle)
}
// Release the underlying htmlayout handle
unuse(e.handle)
e.handle = BAD_HELEMENT
}
func (e *Element) DetachHandler(handler *EventHandler) {
tag := uintptr(unsafe.Pointer(handler))
if attachedHandlers, exists := eventHandlers[e.handle]; exists {
if _, exists := attachedHandlers[handler]; exists {
if ret := C.HTMLayoutDetachEventHandler(e.handle, (*[0]byte)(unsafe.Pointer(goElementProc)), C.LPVOID(tag)); ret != HLDOM_OK {
domPanic(ret, "Failed to detach event handler from element")
}
delete(attachedHandlers, handler)
if len(attachedHandlers) == 0 {
delete(eventHandlers, e.handle)
}
return
}
}
panic("cannot detach, handler was not registered")
}