/// <summary>
/// Enqueues an operation to remove the root view.
/// </summary>
/// <param name="rootViewTag">The root view tag.</param>
public void EnqueueRemoveRootView(int rootViewTag)
{
// Called on layout manager thread
UIViewOperationQueueInstance queue = GetQueueByTag(rootViewTag);
// Send forward
queue.EnqueueRemoveRootView(rootViewTag);
// Do some maintenance/cleanup if needed.
// Find the queue info
var pair = _dispatcherToOperationQueueInfo.First(p => p.Value.queueInstance == queue);
// Decrement number of root views
pair.Value.rootViewCount--;
if (queue != MainUIViewOperationQueue)
{
if (pair.Value.rootViewCount == 0)
{
// We can remove this queue and then destroy
_dispatcherToOperationQueueInfo.Remove(pair.Key);
// Simulate an OnDestroy from the correct dispatcher thread
// (OnResume/OnSuspend/OnDestroy have this thread affinity, all other methods do enqueuings in a thread safe manner)
DispatcherHelpers.RunOnDispatcher(pair.Key, queue.OnDestroy);
}
}
}
/// <summary>
/// Enqueues an operation to remove the root view.
/// </summary>
/// <param name="rootViewTag">The root view tag.</param>
public Task RemoveRootViewAsync(int rootViewTag)
{
// Called on layout manager thread
UIViewOperationQueueInstance queue = GetQueueByTag(rootViewTag);
// Send forward
queue.EnqueueRemoveRootView(rootViewTag);
// Do some maintenance/cleanup if needed.
// Find the queue info
KeyValuePair <CoreDispatcher, QueueInstanceInfo> pair;
lock (_lock)
{
pair = _dispatcherToOperationQueueInfo.First(p => p.Value.queueInstance == queue);
}
// Decrement number of root views
pair.Value.rootViewCount--;
if (queue != MainUIViewOperationQueue)
{
if (pair.Value.rootViewCount == 0)
{
lock (_lock)
{
// We can remove this queue and then destroy
_dispatcherToOperationQueueInfo.Remove(pair.Key);
}
// Simulate an OnDestroy from the correct dispatcher thread
// (OnResume/OnSuspend/OnDestroy have this thread affinity, all other methods do enqueuings in a thread safe manner)
return(DispatcherHelpers.CallOnDispatcher(pair.Key, () =>
{
queue.OnDestroy();
return true;
}));
}
else
{
return(Task.CompletedTask);
}
}
else
{
return(Task.CompletedTask);
}
}