This workaround relies on the fact that a closing client goes inactive before the attachments derez calls happen.
This reverts the change to remove scripts too early instead of stopping them, since the the two step stop then remove is necessary to execute the detach event.
This involves making Attachments module listen for start/stop script changes.
It also involves removing the script from the region on detach in the same manner as every other DeleteSceneObject() call rather than simply stopping it
This is necessary tue to the bad assymetry of start and stop script triggers but it appears to be the correct behaviour anyway, as detached objects are completely gone from the sim.
Not just in a state where their scripts have been stopped.
It seems this is happening because we send a kill for objects that are selected when attached.
A code comment says that this is to get the client to deselect it, but v3 and v1 clients do this just fine without the kill.
Aims to address http://opensimulator.org/mantis/view.php?id=6456
Uses new IEntityInventory.TryGetScriptInstanceRunning()
Makes it clearer that TaskInventoryItem.ScriptRunning cannot be used as it is temporary and not updated.
Enables previously disabled regression test.
Based on SingpostMarv's patch in http://opensimulator.org/mantis/view.php?id=6302 but I prefer a simpler approach that does not expose a resume scripts option right now.
justincc's original work. Sample scripts before doing so. Also refactor some
crucial common code and eliminate parameters that were only ever used with
the same constant value.
Note, this behaviour appears to be at variance with the ll grid as of Tues 17 July 2012, testing with viewer 3.2.1.
The item name in inventory does not change either at the point of detach or after a relog.
This doesn't seem to make any sense and probably stems from a period when this code was directly involved in attaching objects directly from the scene.
This message is already being sent by InventoryAccessModule code instead.
This is to fix a regression starting from 5301648 where attachments had to start being deleted before persistence in order to avoid race conditions with hud update threads.
This prevents a stack overflow where a get position on the avatar will refer to the attachment which will in turn refer back to the avatar.
This required recording of all sitting avatars on a prim which is done separately from recording the sit target avatar.
Recording HashSet is null if there are no sitting avatars in order to save memory.
null would only ever be returned if the item couldn't be located within inventory and this would happen immediately.
In this case, derezzing wouldn't work anyway since there is no item to derez.
If delete doesn't occur first then the update thread can outrace the IsAttachment = false necessary to save attachments and send hud artifacts to other viewers.
Serialization of attachments requires IsAttachment = false so that correct positions are serialized instead of avatar position.
However, doing this when a hud is still attached allows race conditions with update threads, resulting in hud artifacts on other viewers.
This change sets SOG.IsDeleted before serialization changes take place (IsDeleted itself is not a serialized property).
LLClientView then screens out any deleted SOGs before sending updates to viewers.
Previously, setting IsAttachment to false then true was necessary to serialize the updated attachment object information.
However, UpdateAttachmentPosition no longer does this update.
Whilst IsAttachment is set to false there is a race condition where the update thread can wrongly send hud object updates to clients that do not own the hud, resulting in screen artifacts.
The reference is not guaranteed to be there when AddRegion() is called but will definitely be present at RegionLoaded() if it's going to be present at all.
This is because the attachments module code was setting the 'object slam' bit by using PermissionMask.All
Solution here is to route the attachment item creation call through the existing inventory code in BasicInventoryAccessModule rather than copy/pasted code in AttachmentsModule itself.