//user U can take cursor on shape S <=> (U doesn't have other cursors && S is free)
public void HandleCursorRequest(LitePeer peer,
OperationRequest operationRequest,
SendParameters sendParameters)
{
var req = CursorRequest.Read(operationRequest.Parameters);
var changes = false;
if (req.doSet)
{
if (_doc.UserHasCursor(req.ownerId))
{
return; //already holds another cursor
}
var sh = _doc.TryGetShape(req.shapeId);
if (sh == null)
{
return; //no such shape
}
if (sh.GetCursor() != null)
{
return; // shape is busy
}
//ok, lock shape
_doc.LockShape(sh, req.ownerId);
changes = true;
}
else
{
//cursor remove operation is always ok
var sh = _doc.TryGetShape(req.shapeId);
if (sh == null)
{
return; //no such shape
}
_doc.UnlockShape(sh, req.ownerId);
changes = true;
}
if (changes)
{
_room.Broadcast(peer,
CursorEvent.Write(req.doSet, req.ownerId, req.shapeId, _topicId),
sendParameters,
(byte)DiscussionEventCode.CursorEvent,
BroadcastTo.RoomAll); //include self
}
}
public void HandleInitialSceneLoad(LitePeer peer,
OperationRequest operationRequest,
SendParameters sendParameters)
{
//// var req = InitialSceneLoadRequest.Read(operationRequest);
/// req.topicId
_log.Debug("scene load request");
CleanupEmptyClusters();
//1st phase, send creation events for simple shapes (+cluster) in the scene
var simpleShapes = _doc.GetShapes().Where(sh => sh.ShapeCode() != VdShapeType.ClusterLink).ToArray();
foreach (var sh in simpleShapes)
{
_room.PublishEventToSingle(peer,
CreateShape.Write(sh.InitialOwner(), sh.Id(),
sh.ShapeCode(), 400, 400, false, sh.Tag(),
_topicId),
sendParameters,
(byte)DiscussionEventCode.CreateShapeEvent);
}
//2nd phase, send state update packets
foreach (var sh in simpleShapes)
{
var st = sh.GetState();
if (st == null)
{
continue;
}
_room.PublishEventToSingle(peer,
st.ToDict(),
sendParameters,
(byte)DiscussionEventCode.StateSyncEvent);
}
//3rd phase, sequence of cluster-add operations (enumerate contents of all existing clusters)
var clusterShapes = _doc.GetShapes().Where(sh => sh.ShapeCode() == VdShapeType.Cluster);
foreach (var clShape in clusterShapes)
{
var cluster = _topology.GetCluster(clShape.Id());
_log.Info("scene load, cluster updates, num badges =" + cluster.GetClusterables());
foreach (var badge in cluster.GetClusterables())
{
var clustMsg = ClusterBadgeMessage.Write(badge.GetId(),
_doc.TryGetShape(badge.GetId()).InitialOwner(),
badge == cluster.GetClusterables().Last(),
cluster.GetId(),
_topicId,
-1);
_room.PublishEventToSingle(peer,
clustMsg,
sendParameters,
(byte)DiscussionEventCode.ClusterBadgeEvent);
}
}
//4rd phase, create links
var linkShapes = _doc.GetShapes().Where(sh => sh.ShapeCode() == VdShapeType.ClusterLink);
foreach (var lnk in linkShapes)
{
var edge = _topology.GetForwardEdge(lnk.Id());
var ev = LinkCreateMessage.Write(edge.curr.GetId(),
edge.next.GetId(),
lnk.InitialOwner(),
lnk.Id(),
_topicId,
false,
(LinkHeadType)lnk.Tag());
_room.PublishEventToSingle(peer, ev, sendParameters, (byte)DiscussionEventCode.LinkCreateEvent);
//send link state update
var st = lnk.GetState();
if (st != null)
{
_room.PublishEventToSingle(peer,
st.ToDict(),
sendParameters,
(byte)DiscussionEventCode.StateSyncEvent);
}
}
//5th phase, send cursor events
foreach (var sh in _doc.GetShapes())
{
if (sh.GetCursor() == null)
{
continue; //cursors are unset by default for all shapes
}
_room.PublishEventToSingle(peer,
CursorEvent.Write(true,
sh.GetCursor().OwnerId,
sh.Id(),
_topicId),
sendParameters,
(byte)DiscussionEventCode.CursorEvent);
}
//6th phase, send ink
if (_doc.inkData != null)
{
_room.PublishEventToSingle(peer,
InkMessage.Write(-1,
_topicId,
_doc.inkData),
sendParameters,
(byte)DiscussionEventCode.InkEvent);
}
//7th phase, send laser pointers
foreach (var laserPointer in _doc.LaserPointers)
{
_room.PublishEventToSingle(peer,
laserPointer.ToDict(),
sendParameters,
(byte)DiscussionEventCode.AttachLaserPointerEvent);
}
//notify client loading sequence complete
_room.PublishEventToSingle(peer,
null,
sendParameters,
(byte)DiscussionEventCode.SceneLoadingDone);
}