23 classes have been removed as they are no longer needed using the new
capture logic. This should help quite a bit with future MC updates.
BlockPlaceEvent Refactor
Before calling Item.interactWith, a recording flag is turned on for
setTypeAndData to capture a blockstate for each block that attempts to be set.
When a block place event is cancelled, the recorded blockstate, stack
size, and metadata will revert back to the captured state. If the event is
not cancelled, a notification will be sent to clients and block physics
will be updated.
BlockChangeDelegate Refactor
Now that we have the ability to capture blockstates through world, there
is no need to modify world gen classes with BlockChangeDelegate. Instead
we will simply capture blocks during world generation in order to "replay"
all of the captured blockstates to send back to delegates.
StructureGrowDelegate and BlockSapling.TreeGenerator have also been
removed as part of this change. BlockSapling and BlockMushroom will
capture blockstates the same as block placement and revert back any grow
events if needed.
Any new API here needs more thought, skulls require a name but OfflinePlayer
is not guaranteed to have one. There is a Mojang approved way to get a
complete profile from a name but not from a UUID so for now just pretend
this still only uses names.
For Cocoa Blocks, Block.getDropType() returns the item form of the Cocoa
block, rather than the Cocoa Bean item. Because of this, Cocoa blocks need
to have explicit handling in order to return the proper drop contents.
The CraftBlock class is setting bit 0x4 of the update flag when bit 0x2
should in fact be set here. Bit 0x2 means "do updates"; bit 0x4 means
"don't do updates if the world is static, even when bit 0x2 is set".
When a block placement happens we currently update physics on the
attempted placement and update again if the placement is cancelled.
To correct the first one we simply set the block without applying
physics. To correct the second we have to add a new method to
BlockState that lets us update without applying physics and use
this method method when putting the block back.
